scrypt-1.2.0/000755 001751 001751 00000000000 12561447070 014500 5ustar00cpercivacperciva000000 000000 scrypt-1.2.0/autocrap/000755 001751 001751 00000000000 12561447061 016316 5ustar00cpercivacperciva000000 000000 scrypt-1.2.0/libcperciva/000755 001751 001751 00000000000 12561447061 016763 5ustar00cpercivacperciva000000 000000 scrypt-1.2.0/lib/000755 001751 001751 00000000000 12561447061 015246 5ustar00cpercivacperciva000000 000000 scrypt-1.2.0/scrypt.1000644 001751 001751 00000006674 12561447061 016123 0ustar00cpercivacperciva000000 000000 .\" Copyright 2009 Colin Percival .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .Dd May 24, 2009 .Dt SCRYPT 1 .Os .Sh NAME .Nm scrypt .Nd encrypt and decrypt files. .Sh SYNOPSIS .Nm .Brq Cm enc | Cm dec .Op Fl M Ar maxmem .Op Fl m Ar maxmemfrac .Op Fl t Ar maxtime .Ar infile .Op Ar outfile .Sh DESCRIPTION .Nm Cm enc encrypts .Ar infile and writes the result to .Ar outfile if specified, or the standard output otherwise. The user will be prompted to enter a passphrase (twice) to be used to generate a derived encryption key. .Pp .Nm Cm dec decrypts .Ar infile and writes the result to .Ar outfile if specified, or the standard output otherwise. The user will be prompted to enter the passphrase used at encryption time to generate the derived encryption key. .Sh OPTIONS .Bl -tag -width "-m maxmemfrac" .It Fl M Ar maxmem Use at most .Ar maxmem bytes of RAM to compute the derived encryption key. .It Fl m Ar maxmemfrac Use at most the fraction .Ar maxmemfrac of the available RAM to compute the derived encryption key. .It Fl t Ar maxtime Use at most .Ar maxtime seconds of CPU time to compute the derived encryption key. .El .Pp In .Nm Cm enc , the memory and CPU time limits are enforced by picking appropriate parameters to the .Nm key derivation function. In .Nm Cm dec , the memory and CPU time limits are enforced by exiting with an error if decrypting the file would require too much memory or CPU time. .Sh EXIT STATUS The .Nm utility exits 0 on success, and >0 if an error occurs. .Pp Note that if the input encrypted file is corrupted, .Nm Cm dec may produce output prior to determining that the input was corrupt and exiting with a non-zero status; so users should direct the output to a safe location and check the exit status of .Nm before using the decrypted data. .Sh SEE ALSO .Rs .%A "Colin Percival" .%T "Stronger Key Derivation via Sequential Memory-Hard Functions" .%O "Presented at BSDCan'09" .%D "May 2009" .Re .Sh HISTORY The .Nm utility was written in May 2009 by Colin Percival as a demonstration of the .Nm key derivation function. The .Nm key derivation function was invented in March 2009 by Colin Percival in order to allow key files from the .Nm tarsnap backup system to be passphrase protected. scrypt-1.2.0/FORMAT000644 001751 001751 00000001230 12561447061 015407 0ustar00cpercivacperciva000000 000000 scrypt encrypted data format ---------------------------- offset length 0 6 "scrypt" 6 1 scrypt data file version number (== 0) 7 1 log2(N) (must be between 1 and 63 inclusive) 8 4 r (big-endian integer; must satisfy r * p < 2^30) 12 4 p (big-endian integer; must satisfy r * p < 2^30) 16 32 salt 48 16 first 16 bytes of SHA256(bytes 0 .. 47) 64 32 HMAC-SHA256(bytes 0 .. 63) 96 X data xor AES256-CTR key stream generated with nonce == 0 96+X 32 HMAC-SHA256(bytes 0 .. 96 + (X - 1)) AES256-CTR is computed with a 256-bit AES key key_enc, and HMAC-SHA256 is computed with a 256-bit key key_hmac, where scrypt(password, salt, N, r, p, 64) == [key_enc][key_hmac] scrypt-1.2.0/main.c000644 001751 001751 00000010673 12561447061 015577 0ustar00cpercivacperciva000000 000000 /*- * Copyright 2009 Colin Percival * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include "scrypt_platform.h" #include #include #include #include #include #include #include "insecure_memzero.h" #include "readpass.h" #include "scryptenc.h" #include "warnp.h" static void usage(void) { fprintf(stderr, "usage: scrypt {enc | dec} [...] infile [outfile]\n"); exit(1); } int main(int argc, char *argv[]) { FILE * infile; FILE * outfile; int dec = 0; size_t maxmem = 0; double maxmemfrac = 0.5; double maxtime = 300.0; int ch; char * passwd; int rc; WARNP_INIT; /* We should have "enc" or "dec" first. */ if (argc < 2) usage(); if (strcmp(argv[1], "enc") == 0) { maxmem = 0; maxmemfrac = 0.125; maxtime = 5.0; } else if (strcmp(argv[1], "dec") == 0) { dec = 1; } else usage(); argc--; argv++; /* Parse arguments. */ while ((ch = getopt(argc, argv, "hm:M:t:")) != -1) { switch (ch) { case 'M': maxmem = strtoumax(optarg, NULL, 0); break; case 'm': maxmemfrac = strtod(optarg, NULL); break; case 't': maxtime = strtod(optarg, NULL); break; default: usage(); } } argc -= optind; argv += optind; /* We must have one or two parameters left. */ if ((argc < 1) || (argc > 2)) usage(); /* If the input isn't stdin, open the file. */ if (strcmp(argv[0], "-")) { if ((infile = fopen(argv[0], "rb")) == NULL) { warnp("Cannot open input file: %s", argv[0]); exit(1); } } else { infile = stdin; } /* If we have an output file, open it. */ if (argc > 1) { if ((outfile = fopen(argv[1], "wb")) == NULL) { warnp("Cannot open output file: %s", argv[1]); exit(1); } } else { outfile = stdout; } /* Prompt for a password. */ if (readpass(&passwd, "Please enter passphrase", dec ? NULL : "Please confirm passphrase", 1)) exit(1); /* Encrypt or decrypt. */ if (dec) rc = scryptdec_file(infile, outfile, (uint8_t *)passwd, strlen(passwd), maxmem, maxmemfrac, maxtime); else rc = scryptenc_file(infile, outfile, (uint8_t *)passwd, strlen(passwd), maxmem, maxmemfrac, maxtime); /* Zero and free the password. */ insecure_memzero(passwd, strlen(passwd)); free(passwd); /* If we failed, print the right error message and exit. */ if (rc != 0) { switch (rc) { case 1: warnp("Error determining amount of available memory"); break; case 2: warnp("Error reading clocks"); break; case 3: warnp("Error computing derived key"); break; case 4: warnp("Error reading salt"); break; case 5: warnp("OpenSSL error"); break; case 6: warnp("Error allocating memory"); break; case 7: warn0("Input is not valid scrypt-encrypted block"); break; case 8: warn0("Unrecognized scrypt format version"); break; case 9: warn0("Decrypting file would require too much memory"); break; case 10: warn0("Decrypting file would take too much CPU time"); break; case 11: warn0("Passphrase is incorrect"); break; case 12: warnp("Error writing file: %s", (argc > 1) ? argv[1] : "standard output"); break; case 13: warnp("Error reading file: %s", argv[0]); break; } exit(1); } return (0); } scrypt-1.2.0/scrypt_platform.h000644 001751 001751 00000000407 12561447061 020102 0ustar00cpercivacperciva000000 000000 #ifndef _SCRYPT_PLATFORM_H_ #define _SCRYPT_PLATFORM_H_ #if defined(CONFIG_H_FILE) #include CONFIG_H_FILE #elif defined(HAVE_CONFIG_H) #include "config.h" #else #error Need either CONFIG_H_FILE or HAVE_CONFIG_H defined. #endif #endif /* !_SCRYPT_PLATFORM_H_ */ scrypt-1.2.0/Makefile.in000644 001751 001751 00000240064 12561447070 016553 0ustar00cpercivacperciva000000 000000 # Makefile.in generated by automake 1.15 from Makefile.am. # @configure_input@ # Copyright (C) 1994-2014 Free Software Foundation, Inc. # This Makefile.in is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY, to the extent permitted by law; without # even the implied warranty of MERCHANTABILITY or FITNESS FOR A # PARTICULAR PURPOSE. @SET_MAKE@ VPATH = @srcdir@ am__is_gnu_make = { \ if test -z '$(MAKELEVEL)'; then \ false; \ elif test -n '$(MAKE_HOST)'; then \ true; \ elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \ true; \ else \ false; \ fi; \ } am__make_running_with_option = \ case $${target_option-} in \ ?) ;; \ *) echo "am__make_running_with_option: internal error: invalid" \ "target option '$${target_option-}' specified" >&2; \ exit 1;; \ esac; \ has_opt=no; \ sane_makeflags=$$MAKEFLAGS; \ if $(am__is_gnu_make); then \ sane_makeflags=$$MFLAGS; \ else \ case $$MAKEFLAGS in \ *\\[\ \ ]*) \ bs=\\; \ sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \ | sed "s/$$bs$$bs[$$bs $$bs ]*//g"`;; \ esac; \ fi; \ skip_next=no; \ strip_trailopt () \ { \ flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \ }; \ for flg in $$sane_makeflags; do \ test $$skip_next = yes && { skip_next=no; continue; }; \ case $$flg in \ *=*|--*) continue;; \ -*I) strip_trailopt 'I'; skip_next=yes;; \ -*I?*) strip_trailopt 'I';; \ -*O) strip_trailopt 'O'; skip_next=yes;; \ -*O?*) strip_trailopt 'O';; \ -*l) strip_trailopt 'l'; skip_next=yes;; \ -*l?*) strip_trailopt 'l';; \ -[dEDm]) skip_next=yes;; \ -[JT]) skip_next=yes;; \ esac; \ case $$flg in \ *$$target_option*) has_opt=yes; break;; \ esac; \ done; \ test $$has_opt = yes am__make_dryrun = (target_option=n; $(am__make_running_with_option)) am__make_keepgoing = (target_option=k; $(am__make_running_with_option)) pkgdatadir = $(datadir)/@PACKAGE@ pkgincludedir = $(includedir)/@PACKAGE@ pkglibdir = $(libdir)/@PACKAGE@ pkglibexecdir = $(libexecdir)/@PACKAGE@ am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd install_sh_DATA = $(install_sh) -c -m 644 install_sh_PROGRAM = $(install_sh) -c install_sh_SCRIPT = $(install_sh) -c INSTALL_HEADER = $(INSTALL_DATA) transform = $(program_transform_name) NORMAL_INSTALL = : PRE_INSTALL = : POST_INSTALL = : NORMAL_UNINSTALL = : PRE_UNINSTALL = : POST_UNINSTALL = : bin_PROGRAMS = scrypt$(EXEEXT) subdir = . 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Note that we *cannot* use a case # here, because this file can only contain one case statement. if test "$depmode" = hp; then # HP compiler uses -M and no extra arg. gccflag=-M depmode=gcc fi if test "$depmode" = dashXmstdout; then # This is just like dashmstdout with a different argument. dashmflag=-xM depmode=dashmstdout fi cygpath_u="cygpath -u -f -" if test "$depmode" = msvcmsys; then # This is just like msvisualcpp but w/o cygpath translation. # Just convert the backslash-escaped backslashes to single forward # slashes to satisfy depend.m4 cygpath_u='sed s,\\\\,/,g' depmode=msvisualcpp fi if test "$depmode" = msvc7msys; then # This is just like msvc7 but w/o cygpath translation. # Just convert the backslash-escaped backslashes to single forward # slashes to satisfy depend.m4 cygpath_u='sed s,\\\\,/,g' depmode=msvc7 fi if test "$depmode" = xlc; then # IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information. gccflag=-qmakedep=gcc,-MF depmode=gcc fi case "$depmode" in gcc3) ## gcc 3 implements dependency tracking that does exactly what ## we want. Yay! Note: for some reason libtool 1.4 doesn't like ## it if -MD -MP comes after the -MF stuff. Hmm. ## Unfortunately, FreeBSD c89 acceptance of flags depends upon ## the command line argument order; so add the flags where they ## appear in depend2.am. Note that the slowdown incurred here ## affects only configure: in makefiles, %FASTDEP% shortcuts this. for arg do case $arg in -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;; *) set fnord "$@" "$arg" ;; esac shift # fnord shift # $arg done "$@" stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi mv "$tmpdepfile" "$depfile" ;; gcc) ## Note that this doesn't just cater to obsosete pre-3.x GCC compilers. ## but also to in-use compilers like IMB xlc/xlC and the HP C compiler. ## (see the conditional assignment to $gccflag above). ## There are various ways to get dependency output from gcc. 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On the theory ## that the space means something, we add a space to the output as ## well. hp depmode also adds that space, but also prefixes the VPATH ## to the object. Take care to not repeat it in the output. ## Some versions of the HPUX 10.20 sed can't process this invocation ## correctly. Breaking it into two sed invocations is a workaround. tr ' ' "$nl" < "$tmpdepfile" \ | sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \ | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; hp) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;; sgi) if test "$libtool" = yes; then "$@" "-Wp,-MDupdate,$tmpdepfile" else "$@" -MDupdate "$tmpdepfile" fi stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" if test -f "$tmpdepfile"; then # yes, the sourcefile depend on other files echo "$object : \\" > "$depfile" # Clip off the initial element (the dependent). Don't try to be # clever and replace this with sed code, as IRIX sed won't handle # lines with more than a fixed number of characters (4096 in # IRIX 6.2 sed, 8192 in IRIX 6.5). We also remove comment lines; # the IRIX cc adds comments like '#:fec' to the end of the # dependency line. tr ' ' "$nl" < "$tmpdepfile" \ | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' \ | tr "$nl" ' ' >> "$depfile" echo >> "$depfile" # The second pass generates a dummy entry for each header file. tr ' ' "$nl" < "$tmpdepfile" \ | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \ >> "$depfile" else make_dummy_depfile fi rm -f "$tmpdepfile" ;; xlc) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;; aix) # The C for AIX Compiler uses -M and outputs the dependencies # in a .u file. In older versions, this file always lives in the # current directory. 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"$@" || exit $? # Remove the call to Libtool. if test "$libtool" = yes; then while test "X$1" != 'X--mode=compile'; do shift done shift fi IFS=" " for arg do case "$arg" in -o) shift ;; $object) shift ;; "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI") set fnord "$@" shift shift ;; *) set fnord "$@" "$arg" shift shift ;; esac done "$@" -E 2>/dev/null | sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile" rm -f "$depfile" echo "$object : \\" > "$depfile" sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::'"$tab"'\1 \\:p' >> "$depfile" echo "$tab" >> "$depfile" sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile" rm -f "$tmpdepfile" ;; msvcmsys) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;; none) exec "$@" ;; *) echo "Unknown depmode $depmode" 1>&2 exit 1 ;; esac exit 0 # Local Variables: # mode: shell-script # sh-indentation: 2 # eval: (add-hook 'write-file-hooks 'time-stamp) # time-stamp-start: "scriptversion=" # time-stamp-format: "%:y-%02m-%02d.%02H" # time-stamp-time-zone: "UTC" # time-stamp-end: "; # UTC" # End: scrypt-1.2.0/lib/crypto/000755 001751 001751 00000000000 12561447061 016566 5ustar00cpercivacperciva000000 000000 scrypt-1.2.0/lib/scryptenc/000755 001751 001751 00000000000 12561447061 017260 5ustar00cpercivacperciva000000 000000 scrypt-1.2.0/lib/util/000755 001751 001751 00000000000 12561447061 016223 5ustar00cpercivacperciva000000 000000 scrypt-1.2.0/lib/README000644 001751 001751 00000000561 12561447061 016130 0ustar00cpercivacperciva000000 000000 The source code under this directory is taken from the client for the Tarsnap online backup system (and released under the 2-clause BSD license with permission of the author); keeping this code in sync with the Tarsnap code is highly desirable and explains why there is some functionality included here which is not actually used by the scrypt file encryption utility. scrypt-1.2.0/lib/util/memlimit.c000644 001751 001751 00000017143 12561447061 020212 0ustar00cpercivacperciva000000 000000 /*- * Copyright 2009 Colin Percival * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * This file was originally written by Colin Percival as part of the Tarsnap * online backup system. */ #include "scrypt_platform.h" #include #include #ifdef HAVE_SYS_PARAM_H #include #endif #ifdef HAVE_SYS_SYSCTL_H #include #endif #ifdef HAVE_SYS_SYSINFO_H #include #endif #include #include #include #include #include #ifdef DEBUG #include #endif #include "memlimit.h" /* If we don't have CTL_HW, we can't use HW_USERMEM. */ #ifndef CTL_HW #undef HW_USERMEM #endif #ifdef CTL_HW static int memlimit_sysctl_hw(size_t * memlimit, int mibleaf) { int mib[2]; uint8_t sysctlbuf[8]; size_t sysctlbuflen = 8; uint64_t sysctlval; /* Ask the kernel how much RAM we have. */ mib[0] = CTL_HW; mib[1] = mibleaf; if (sysctl(mib, 2, sysctlbuf, &sysctlbuflen, NULL, 0)) return (1); /* * If we read 8 bytes out, assume this is a system-endian uint64_t. * If we only read 4 bytes out, the OS is trying to give us a * uint32_t answer -- but given how many systems now have 4GB+ of RAM, * it's probably truncating, and we really can't trust the value we * have returned to us. */ if (sysctlbuflen == sizeof(uint64_t)) memcpy(&sysctlval, sysctlbuf, sizeof(uint64_t)); else if (sysctlbuflen == sizeof(uint32_t)) sysctlval = SIZE_MAX; else return (1); /* Return the sysctl value, but clamp to SIZE_MAX if necessary. */ #if UINT64_MAX > SIZE_MAX if (sysctlval > SIZE_MAX) *memlimit = SIZE_MAX; else *memlimit = sysctlval; #else *memlimit = sysctlval; #endif /* Success! */ return (0); } #endif /* If we don't HAVE_STRUCT_SYSINFO, we can't use sysinfo. */ #ifndef HAVE_STRUCT_SYSINFO #undef HAVE_SYSINFO #endif /* If we don't HAVE_STRUCT_SYSINFO_TOTALRAM, we can't use sysinfo. */ #ifndef HAVE_STRUCT_SYSINFO_TOTALRAM #undef HAVE_SYSINFO #endif #ifdef HAVE_SYSINFO static int memlimit_sysinfo(size_t * memlimit) { struct sysinfo info; uint64_t totalmem; /* Get information from the kernel. */ if (sysinfo(&info)) return (1); totalmem = info.totalram; /* If we're on a modern kernel, adjust based on mem_unit. */ #ifdef HAVE_STRUCT_SYSINFO_MEM_UNIT totalmem = totalmem * info.mem_unit; #endif /* Return the value, but clamp to SIZE_MAX if necessary. */ #if UINT64_MAX > SIZE_MAX if (totalmem > SIZE_MAX) *memlimit = SIZE_MAX; else *memlimit = totalmem; #else *memlimit = totalmem; #endif /* Success! */ return (0); } #endif /* HAVE_SYSINFO */ static int memlimit_rlimit(size_t * memlimit) { struct rlimit rl; uint64_t memrlimit; /* Find the least of... */ memrlimit = (uint64_t)(-1); /* ... RLIMIT_AS... */ #ifdef RLIMIT_AS if (getrlimit(RLIMIT_AS, &rl)) return (1); if ((rl.rlim_cur != RLIM_INFINITY) && ((uint64_t)rl.rlim_cur < memrlimit)) memrlimit = rl.rlim_cur; #endif /* ... RLIMIT_DATA... */ if (getrlimit(RLIMIT_DATA, &rl)) return (1); if ((rl.rlim_cur != RLIM_INFINITY) && ((uint64_t)rl.rlim_cur < memrlimit)) memrlimit = rl.rlim_cur; /* ... and RLIMIT_RSS. */ #ifdef RLIMIT_RSS if (getrlimit(RLIMIT_RSS, &rl)) return (1); if ((rl.rlim_cur != RLIM_INFINITY) && ((uint64_t)rl.rlim_cur < memrlimit)) memrlimit = rl.rlim_cur; #endif /* Return the value, but clamp to SIZE_MAX if necessary. */ #if UINT64_MAX > SIZE_MAX if (memrlimit > SIZE_MAX) *memlimit = SIZE_MAX; else *memlimit = memrlimit; #else *memlimit = memrlimit; #endif /* Success! */ return (0); } #ifdef _SC_PHYS_PAGES /* Some systems define _SC_PAGESIZE instead of _SC_PAGE_SIZE. */ #ifndef _SC_PAGE_SIZE #define _SC_PAGE_SIZE _SC_PAGESIZE #endif static int memlimit_sysconf(size_t * memlimit) { long pagesize; long physpages; uint64_t totalmem; /* Set errno to 0 in order to distinguish "no limit" from "error". */ errno = 0; /* Read the two limits. */ if (((pagesize = sysconf(_SC_PAGE_SIZE)) == -1) || ((physpages = sysconf(_SC_PHYS_PAGES)) == -1)) { /* Did an error occur? */ if (errno != 0) return (1); /* If not, there is no limit. */ totalmem = (uint64_t)(-1); } else { /* Compute the limit. */ totalmem = (uint64_t)(pagesize) * (uint64_t)(physpages); } /* Return the value, but clamp to SIZE_MAX if necessary. */ #if UINT64_MAX > SIZE_MAX if (totalmem > SIZE_MAX) *memlimit = SIZE_MAX; else *memlimit = totalmem; #else *memlimit = totalmem; #endif /* Success! */ return (0); } #endif int memtouse(size_t maxmem, double maxmemfrac, size_t * memlimit) { size_t usermem_memlimit, memsize_memlimit; size_t sysinfo_memlimit, rlimit_memlimit; size_t sysconf_memlimit; size_t memlimit_min; size_t memavail; /* Get memory limits. */ #ifdef HW_USERMEM if (memlimit_sysctl_hw(&usermem_memlimit, HW_USERMEM)) return (1); #else usermem_memlimit = SIZE_MAX; #endif #ifdef HW_MEMSIZE if (memlimit_sysctl_hw(&memsize_memlimit, HW_MEMSIZE)) return (1); #else memsize_memlimit = SIZE_MAX; #endif #ifdef HAVE_SYSINFO if (memlimit_sysinfo(&sysinfo_memlimit)) return (1); #else sysinfo_memlimit = SIZE_MAX; #endif if (memlimit_rlimit(&rlimit_memlimit)) return (1); #ifdef _SC_PHYS_PAGES if (memlimit_sysconf(&sysconf_memlimit)) return (1); #else sysconf_memlimit = SIZE_MAX; #endif #ifdef DEBUG fprintf(stderr, "Memory limits are %zu %zu %zu %zu %zu\n", usermem_memlimit, memsize_memlimit, sysinfo_memlimit, rlimit_memlimit, sysconf_memlimit); #endif /* Find the smallest of them. */ memlimit_min = SIZE_MAX; if (memlimit_min > usermem_memlimit) memlimit_min = usermem_memlimit; if (memlimit_min > memsize_memlimit) memlimit_min = memsize_memlimit; if (memlimit_min > sysinfo_memlimit) memlimit_min = sysinfo_memlimit; if (memlimit_min > rlimit_memlimit) memlimit_min = rlimit_memlimit; if (memlimit_min > sysconf_memlimit) memlimit_min = sysconf_memlimit; /* Only use the specified fraction of the available memory. */ if ((maxmemfrac > 0.5) || (maxmemfrac == 0.0)) maxmemfrac = 0.5; memavail = maxmemfrac * memlimit_min; /* Don't use more than the specified maximum. */ if ((maxmem > 0) && (memavail > maxmem)) memavail = maxmem; /* But always allow at least 1 MiB. */ if (memavail < 1048576) memavail = 1048576; #ifdef DEBUG fprintf(stderr, "Allowing up to %zu memory to be used\n", memavail); #endif /* Return limit via the provided pointer. */ *memlimit = memavail; return (0); } scrypt-1.2.0/lib/util/memlimit.h000644 001751 001751 00000003443 12561447061 020215 0ustar00cpercivacperciva000000 000000 /*- * Copyright 2009 Colin Percival * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * This file was originally written by Colin Percival as part of the Tarsnap * online backup system. */ #ifndef _MEMLIMIT_H_ #define _MEMLIMIT_H_ #include /** * memtouse(maxmem, maxmemfrac, memlimit): * Examine the system and return via memlimit the amount of RAM which should * be used -- the specified fraction of the available RAM, but no more than * maxmem, and no less than 1MiB. */ int memtouse(size_t, double, size_t *); #endif /* !_MEMLIMIT_H_ */ scrypt-1.2.0/lib/scryptenc/scryptenc.c000644 001751 001751 00000035054 12561447061 021445 0ustar00cpercivacperciva000000 000000 /*- * Copyright 2009 Colin Percival * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * This file was originally written by Colin Percival as part of the Tarsnap * online backup system. */ #include "scrypt_platform.h" #include #include #include #include #include #include #include "crypto_aes.h" #include "crypto_aesctr.h" #include "crypto_entropy.h" #include "insecure_memzero.h" #include "sha256.h" #include "sysendian.h" #include "crypto_scrypt.h" #include "memlimit.h" #include "scryptenc_cpuperf.h" #include "scryptenc.h" #define ENCBLOCK 65536 static int pickparams(size_t, double, double, int *, uint32_t *, uint32_t *); static int checkparams(size_t, double, double, int, uint32_t, uint32_t); static int pickparams(size_t maxmem, double maxmemfrac, double maxtime, int * logN, uint32_t * r, uint32_t * p) { size_t memlimit; double opps; double opslimit; double maxN, maxrp; int rc; /* Figure out how much memory to use. */ if (memtouse(maxmem, maxmemfrac, &memlimit)) return (1); /* Figure out how fast the CPU is. */ if ((rc = scryptenc_cpuperf(&opps)) != 0) return (rc); opslimit = opps * maxtime; /* Allow a minimum of 2^15 salsa20/8 cores. */ if (opslimit < 32768) opslimit = 32768; /* Fix r = 8 for now. */ *r = 8; /* * The memory limit requires that 128Nr <= memlimit, while the CPU * limit requires that 4Nrp <= opslimit. If opslimit < memlimit/32, * opslimit imposes the stronger limit on N. */ #ifdef DEBUG fprintf(stderr, "Requiring 128Nr <= %zu, 4Nrp <= %f\n", memlimit, opslimit); #endif if (opslimit < memlimit/32) { /* Set p = 1 and choose N based on the CPU limit. */ *p = 1; maxN = opslimit / (*r * 4); for (*logN = 1; *logN < 63; *logN += 1) { if ((uint64_t)(1) << *logN > maxN / 2) break; } } else { /* Set N based on the memory limit. */ maxN = memlimit / (*r * 128); for (*logN = 1; *logN < 63; *logN += 1) { if ((uint64_t)(1) << *logN > maxN / 2) break; } /* Choose p based on the CPU limit. */ maxrp = (opslimit / 4) / ((uint64_t)(1) << *logN); if (maxrp > 0x3fffffff) maxrp = 0x3fffffff; *p = (uint32_t)(maxrp) / *r; } #ifdef DEBUG fprintf(stderr, "N = %zu r = %d p = %d\n", (size_t)(1) << *logN, (int)(*r), (int)(*p)); #endif /* Success! */ return (0); } static int checkparams(size_t maxmem, double maxmemfrac, double maxtime, int logN, uint32_t r, uint32_t p) { size_t memlimit; double opps; double opslimit; uint64_t N; int rc; /* Figure out the maximum amount of memory we can use. */ if (memtouse(maxmem, maxmemfrac, &memlimit)) return (1); /* Figure out how fast the CPU is. */ if ((rc = scryptenc_cpuperf(&opps)) != 0) return (rc); opslimit = opps * maxtime; /* Sanity-check values. */ if ((logN < 1) || (logN > 63)) return (7); if ((uint64_t)(r) * (uint64_t)(p) >= 0x40000000) return (7); /* Check limits. */ N = (uint64_t)(1) << logN; if ((memlimit / N) / r < 128) return (9); if ((opslimit / N) / (r * p) < 4) return (10); /* Success! */ return (0); } static int scryptenc_setup(uint8_t header[96], uint8_t dk[64], const uint8_t * passwd, size_t passwdlen, size_t maxmem, double maxmemfrac, double maxtime) { uint8_t salt[32]; uint8_t hbuf[32]; int logN; uint64_t N; uint32_t r; uint32_t p; SHA256_CTX ctx; uint8_t * key_hmac = &dk[32]; HMAC_SHA256_CTX hctx; int rc; /* Pick values for N, r, p. */ if ((rc = pickparams(maxmem, maxmemfrac, maxtime, &logN, &r, &p)) != 0) return (rc); N = (uint64_t)(1) << logN; /* Get some salt. */ if (crypto_entropy_read(salt, 32)) return (4); /* Generate the derived keys. */ if (crypto_scrypt(passwd, passwdlen, salt, 32, N, r, p, dk, 64)) return (3); /* Construct the file header. */ memcpy(header, "scrypt", 6); header[6] = 0; header[7] = logN; be32enc(&header[8], r); be32enc(&header[12], p); memcpy(&header[16], salt, 32); /* Add header checksum. */ SHA256_Init(&ctx); SHA256_Update(&ctx, header, 48); SHA256_Final(hbuf, &ctx); memcpy(&header[48], hbuf, 16); /* Add header signature (used for verifying password). */ HMAC_SHA256_Init(&hctx, key_hmac, 32); HMAC_SHA256_Update(&hctx, header, 64); HMAC_SHA256_Final(hbuf, &hctx); memcpy(&header[64], hbuf, 32); /* Success! */ return (0); } static int scryptdec_setup(const uint8_t header[96], uint8_t dk[64], const uint8_t * passwd, size_t passwdlen, size_t maxmem, double maxmemfrac, double maxtime) { uint8_t salt[32]; uint8_t hbuf[32]; int logN; uint32_t r; uint32_t p; uint64_t N; SHA256_CTX ctx; uint8_t * key_hmac = &dk[32]; HMAC_SHA256_CTX hctx; int rc; /* Parse N, r, p, salt. */ logN = header[7]; r = be32dec(&header[8]); p = be32dec(&header[12]); memcpy(salt, &header[16], 32); /* Verify header checksum. */ SHA256_Init(&ctx); SHA256_Update(&ctx, header, 48); SHA256_Final(hbuf, &ctx); if (memcmp(&header[48], hbuf, 16)) return (7); /* * Check whether the provided parameters are valid and whether the * key derivation function can be computed within the allowed memory * and CPU time. */ if ((rc = checkparams(maxmem, maxmemfrac, maxtime, logN, r, p)) != 0) return (rc); /* Compute the derived keys. */ N = (uint64_t)(1) << logN; if (crypto_scrypt(passwd, passwdlen, salt, 32, N, r, p, dk, 64)) return (3); /* Check header signature (i.e., verify password). */ HMAC_SHA256_Init(&hctx, key_hmac, 32); HMAC_SHA256_Update(&hctx, header, 64); HMAC_SHA256_Final(hbuf, &hctx); if (memcmp(hbuf, &header[64], 32)) return (11); /* Success! */ return (0); } /** * scryptenc_buf(inbuf, inbuflen, outbuf, passwd, passwdlen, * maxmem, maxmemfrac, maxtime): * Encrypt inbuflen bytes from inbuf, writing the resulting inbuflen + 128 * bytes to outbuf. */ int scryptenc_buf(const uint8_t * inbuf, size_t inbuflen, uint8_t * outbuf, const uint8_t * passwd, size_t passwdlen, size_t maxmem, double maxmemfrac, double maxtime) { uint8_t dk[64]; uint8_t hbuf[32]; uint8_t header[96]; uint8_t * key_enc = dk; uint8_t * key_hmac = &dk[32]; int rc; HMAC_SHA256_CTX hctx; struct crypto_aes_key * key_enc_exp; struct crypto_aesctr * AES; /* Generate the header and derived key. */ if ((rc = scryptenc_setup(header, dk, passwd, passwdlen, maxmem, maxmemfrac, maxtime)) != 0) return (rc); /* Copy header into output buffer. */ memcpy(outbuf, header, 96); /* Encrypt data. */ if ((key_enc_exp = crypto_aes_key_expand(key_enc, 32)) == NULL) return (5); if ((AES = crypto_aesctr_init(key_enc_exp, 0)) == NULL) return (6); crypto_aesctr_stream(AES, inbuf, &outbuf[96], inbuflen); crypto_aesctr_free(AES); crypto_aes_key_free(key_enc_exp); /* Add signature. */ HMAC_SHA256_Init(&hctx, key_hmac, 32); HMAC_SHA256_Update(&hctx, outbuf, 96 + inbuflen); HMAC_SHA256_Final(hbuf, &hctx); memcpy(&outbuf[96 + inbuflen], hbuf, 32); /* Zero sensitive data. */ insecure_memzero(dk, 64); /* Success! */ return (0); } /** * scryptdec_buf(inbuf, inbuflen, outbuf, outlen, passwd, passwdlen, * maxmem, maxmemfrac, maxtime): * Decrypt inbuflen bytes from inbuf, writing the result into outbuf and the * decrypted data length to outlen. The allocated length of outbuf must * be at least inbuflen. */ int scryptdec_buf(const uint8_t * inbuf, size_t inbuflen, uint8_t * outbuf, size_t * outlen, const uint8_t * passwd, size_t passwdlen, size_t maxmem, double maxmemfrac, double maxtime) { uint8_t hbuf[32]; uint8_t dk[64]; uint8_t * key_enc = dk; uint8_t * key_hmac = &dk[32]; int rc; HMAC_SHA256_CTX hctx; struct crypto_aes_key * key_enc_exp; struct crypto_aesctr * AES; /* * All versions of the scrypt format will start with "scrypt" and * have at least 7 bytes of header. */ if ((inbuflen < 7) || (memcmp(inbuf, "scrypt", 6) != 0)) return (7); /* Check the format. */ if (inbuf[6] != 0) return (8); /* We must have at least 128 bytes. */ if (inbuflen < 128) return (7); /* Parse the header and generate derived keys. */ if ((rc = scryptdec_setup(inbuf, dk, passwd, passwdlen, maxmem, maxmemfrac, maxtime)) != 0) return (rc); /* Decrypt data. */ if ((key_enc_exp = crypto_aes_key_expand(key_enc, 32)) == NULL) return (5); if ((AES = crypto_aesctr_init(key_enc_exp, 0)) == NULL) return (6); crypto_aesctr_stream(AES, &inbuf[96], outbuf, inbuflen - 128); crypto_aesctr_free(AES); crypto_aes_key_free(key_enc_exp); *outlen = inbuflen - 128; /* Verify signature. */ HMAC_SHA256_Init(&hctx, key_hmac, 32); HMAC_SHA256_Update(&hctx, inbuf, inbuflen - 32); HMAC_SHA256_Final(hbuf, &hctx); if (memcmp(hbuf, &inbuf[inbuflen - 32], 32)) return (7); /* Zero sensitive data. */ insecure_memzero(dk, 64); /* Success! */ return (0); } /** * scryptenc_file(infile, outfile, passwd, passwdlen, * maxmem, maxmemfrac, maxtime): * Read a stream from infile and encrypt it, writing the resulting stream to * outfile. */ int scryptenc_file(FILE * infile, FILE * outfile, const uint8_t * passwd, size_t passwdlen, size_t maxmem, double maxmemfrac, double maxtime) { uint8_t buf[ENCBLOCK]; uint8_t dk[64]; uint8_t hbuf[32]; uint8_t header[96]; uint8_t * key_enc = dk; uint8_t * key_hmac = &dk[32]; size_t readlen; HMAC_SHA256_CTX hctx; struct crypto_aes_key * key_enc_exp; struct crypto_aesctr * AES; int rc; /* Generate the header and derived key. */ if ((rc = scryptenc_setup(header, dk, passwd, passwdlen, maxmem, maxmemfrac, maxtime)) != 0) return (rc); /* Hash and write the header. */ HMAC_SHA256_Init(&hctx, key_hmac, 32); HMAC_SHA256_Update(&hctx, header, 96); if (fwrite(header, 96, 1, outfile) != 1) return (12); /* * Read blocks of data, encrypt them, and write them out; hash the * data as it is produced. */ if ((key_enc_exp = crypto_aes_key_expand(key_enc, 32)) == NULL) return (5); if ((AES = crypto_aesctr_init(key_enc_exp, 0)) == NULL) return (6); do { if ((readlen = fread(buf, 1, ENCBLOCK, infile)) == 0) break; crypto_aesctr_stream(AES, buf, buf, readlen); HMAC_SHA256_Update(&hctx, buf, readlen); if (fwrite(buf, 1, readlen, outfile) < readlen) { crypto_aesctr_free(AES); return (12); } } while (1); crypto_aesctr_free(AES); crypto_aes_key_free(key_enc_exp); /* Did we exit the loop due to a read error? */ if (ferror(infile)) return (13); /* Compute the final HMAC and output it. */ HMAC_SHA256_Final(hbuf, &hctx); if (fwrite(hbuf, 32, 1, outfile) != 1) return (12); /* Zero sensitive data. */ insecure_memzero(dk, 64); /* Success! */ return (0); } /** * scryptdec_file(infile, outfile, passwd, passwdlen, * maxmem, maxmemfrac, maxtime): * Read a stream from infile and decrypt it, writing the resulting stream to * outfile. */ int scryptdec_file(FILE * infile, FILE * outfile, const uint8_t * passwd, size_t passwdlen, size_t maxmem, double maxmemfrac, double maxtime) { uint8_t buf[ENCBLOCK + 32]; uint8_t header[96]; uint8_t hbuf[32]; uint8_t dk[64]; uint8_t * key_enc = dk; uint8_t * key_hmac = &dk[32]; size_t buflen = 0; size_t readlen; HMAC_SHA256_CTX hctx; struct crypto_aes_key * key_enc_exp; struct crypto_aesctr * AES; int rc; /* * Read the first 7 bytes of the file; all future versions of scrypt * are guaranteed to have at least 7 bytes of header. */ if (fread(header, 7, 1, infile) < 1) { if (ferror(infile)) return (13); else return (7); } /* Do we have the right magic? */ if (memcmp(header, "scrypt", 6)) return (7); if (header[6] != 0) return (8); /* * Read another 89 bytes of the file; version 0 of the scrypt file * format has a 96-byte header. */ if (fread(&header[7], 89, 1, infile) < 1) { if (ferror(infile)) return (13); else return (7); } /* Parse the header and generate derived keys. */ if ((rc = scryptdec_setup(header, dk, passwd, passwdlen, maxmem, maxmemfrac, maxtime)) != 0) return (rc); /* Start hashing with the header. */ HMAC_SHA256_Init(&hctx, key_hmac, 32); HMAC_SHA256_Update(&hctx, header, 96); /* * We don't know how long the encrypted data block is (we can't know, * since data can be streamed into 'scrypt enc') so we need to read * data and decrypt all of it except the final 32 bytes, then check * if that final 32 bytes is the correct signature. */ if ((key_enc_exp = crypto_aes_key_expand(key_enc, 32)) == NULL) return (5); if ((AES = crypto_aesctr_init(key_enc_exp, 0)) == NULL) return (6); do { /* Read data until we have more than 32 bytes of it. */ if ((readlen = fread(&buf[buflen], 1, ENCBLOCK + 32 - buflen, infile)) == 0) break; buflen += readlen; if (buflen <= 32) continue; /* * Decrypt, hash, and output everything except the last 32 * bytes out of what we have in our buffer. */ HMAC_SHA256_Update(&hctx, buf, buflen - 32); crypto_aesctr_stream(AES, buf, buf, buflen - 32); if (fwrite(buf, 1, buflen - 32, outfile) < buflen - 32) { crypto_aesctr_free(AES); return (12); } /* Move the last 32 bytes to the start of the buffer. */ memmove(buf, &buf[buflen - 32], 32); buflen = 32; } while (1); crypto_aesctr_free(AES); crypto_aes_key_free(key_enc_exp); /* Did we exit the loop due to a read error? */ if (ferror(infile)) return (13); /* Did we read enough data that we *might* have a valid signature? */ if (buflen < 32) return (7); /* Verify signature. */ HMAC_SHA256_Final(hbuf, &hctx); if (memcmp(hbuf, buf, 32)) return (7); /* Zero sensitive data. */ insecure_memzero(dk, 64); return (0); } scrypt-1.2.0/lib/scryptenc/scryptenc.h000644 001751 001751 00000011703 12561447061 021445 0ustar00cpercivacperciva000000 000000 /*- * Copyright 2009 Colin Percival * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * This file was originally written by Colin Percival as part of the Tarsnap * online backup system. */ #ifndef _SCRYPTENC_H_ #define _SCRYPTENC_H_ #include #include /** * NOTE: This file provides prototypes for routines which encrypt/decrypt data * using a key derived from a password by using the scrypt key derivation * function. If you are just trying to "hash" a password for user logins, * this is not the code you are looking for. You want to use the crypt_scrypt * function directly. */ /** * The parameters maxmem, maxmemfrac, and maxtime used by all of these * functions are defined as follows: * maxmem - maximum number of bytes of storage to use for V array (which is * by far the largest consumer of memory). If this value is set to 0, no * maximum will be enforced; any other value less than 1 MiB will be * treated as 1 MiB. * maxmemfrac - maximum fraction of available storage to use for the V array, * where "available storage" is defined as the minimum out of the * RLIMIT_AS, RLIMIT_DATA. and RLIMIT_RSS resource limits (if any are * set). If this value is set to 0 or more than 0.5 it will be treated * as 0.5; and this value will never cause a limit of less than 1 MiB to * be enforced. * maxtime - maximum amount of CPU time to spend computing the derived keys, * in seconds. This limit is only approximately enforced; the CPU * performance is estimated and parameter limits are chosen accordingly. * For the encryption functions, the parameters to the scrypt key derivation * function are chosen to make the key as strong as possible subject to the * specified limits; for the decryption functions, the parameters used are * compared to the computed limits and an error is returned if decrypting * the data would take too much memory or CPU time. */ /** * Return codes from scrypt(enc|dec)_(buf|file): * 0 success * 1 getrlimit or sysctl(hw.usermem) failed * 2 clock_getres or clock_gettime failed * 3 error computing derived key * 4 could not read salt from /dev/urandom * 5 error in OpenSSL * 6 malloc failed * 7 data is not a valid scrypt-encrypted block * 8 unrecognized scrypt format * 9 decrypting file would take too much memory * 10 decrypting file would take too long * 11 password is incorrect * 12 error writing output file * 13 error reading input file */ /** * scryptenc_buf(inbuf, inbuflen, outbuf, passwd, passwdlen, * maxmem, maxmemfrac, maxtime): * Encrypt inbuflen bytes from inbuf, writing the resulting inbuflen + 128 * bytes to outbuf. */ int scryptenc_buf(const uint8_t *, size_t, uint8_t *, const uint8_t *, size_t, size_t, double, double); /** * scryptdec_buf(inbuf, inbuflen, outbuf, outlen, passwd, passwdlen, * maxmem, maxmemfrac, maxtime): * Decrypt inbuflen bytes from inbuf, writing the result into outbuf and the * decrypted data length to outlen. The allocated length of outbuf must * be at least inbuflen. */ int scryptdec_buf(const uint8_t *, size_t, uint8_t *, size_t *, const uint8_t *, size_t, size_t, double, double); /** * scryptenc_file(infile, outfile, passwd, passwdlen, * maxmem, maxmemfrac, maxtime): * Read a stream from infile and encrypt it, writing the resulting stream to * outfile. */ int scryptenc_file(FILE *, FILE *, const uint8_t *, size_t, size_t, double, double); /** * scryptdec_file(infile, outfile, passwd, passwdlen, * maxmem, maxmemfrac, maxtime): * Read a stream from infile and decrypt it, writing the resulting stream to * outfile. */ int scryptdec_file(FILE *, FILE *, const uint8_t *, size_t, size_t, double, double); #endif /* !_SCRYPTENC_H_ */ scrypt-1.2.0/lib/scryptenc/scryptenc_cpuperf.c000644 001751 001751 00000010471 12561447061 023165 0ustar00cpercivacperciva000000 000000 /*- * Copyright 2009 Colin Percival * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * This file was originally written by Colin Percival as part of the Tarsnap * online backup system. */ #include "scrypt_platform.h" #include #include #include #include #include "crypto_scrypt.h" #include "scryptenc_cpuperf.h" #ifdef HAVE_CLOCK_GETTIME static clock_t clocktouse; static int getclockres(double * resd) { struct timespec res; /* * Try clocks in order of preference until we find one which works. * (We assume that if clock_getres works, clock_gettime will, too.) * The use of if/else/if/else/if/else rather than if/elif/elif/else * is ugly but legal, and allows us to #ifdef things appropriately. */ #ifdef CLOCK_VIRTUAL if (clock_getres(CLOCK_VIRTUAL, &res) == 0) clocktouse = CLOCK_VIRTUAL; else #endif #ifdef CLOCK_MONOTONIC if (clock_getres(CLOCK_MONOTONIC, &res) == 0) clocktouse = CLOCK_MONOTONIC; else #endif if (clock_getres(CLOCK_REALTIME, &res) == 0) clocktouse = CLOCK_REALTIME; else return (-1); /* Convert clock resolution to a double. */ *resd = res.tv_sec + res.tv_nsec * 0.000000001; return (0); } static int getclocktime(struct timespec * ts) { if (clock_gettime(clocktouse, ts)) return (-1); return (0); } #else static int getclockres(double * resd) { *resd = 1.0 / CLOCKS_PER_SEC; return (0); } static int getclocktime(struct timespec * ts) { struct timeval tv; if (gettimeofday(&tv, NULL)) return (-1); ts->tv_sec = tv.tv_sec; ts->tv_nsec = tv.tv_usec * 1000; return (0); } #endif static int getclockdiff(struct timespec * st, double * diffd) { struct timespec en; if (getclocktime(&en)) return (1); *diffd = (en.tv_nsec - st->tv_nsec) * 0.000000001 + (en.tv_sec - st->tv_sec); return (0); } /** * scryptenc_cpuperf(opps): * Estimate the number of salsa20/8 cores which can be executed per second, * and return the value via opps. */ int scryptenc_cpuperf(double * opps) { struct timespec st; double resd, diffd; uint64_t i = 0; /* Get the clock resolution. */ if (getclockres(&resd)) return (2); #ifdef DEBUG fprintf(stderr, "Clock resolution is %f\n", resd); #endif /* Loop until the clock ticks. */ if (getclocktime(&st)) return (2); do { /* Do an scrypt. */ if (crypto_scrypt(NULL, 0, NULL, 0, 16, 1, 1, NULL, 0)) return (3); /* Has the clock ticked? */ if (getclockdiff(&st, &diffd)) return (2); if (diffd > 0) break; } while (1); /* Count how many scrypts we can do before the next tick. */ if (getclocktime(&st)) return (2); do { /* Do an scrypt. */ if (crypto_scrypt(NULL, 0, NULL, 0, 128, 1, 1, NULL, 0)) return (3); /* We invoked the salsa20/8 core 512 times. */ i += 512; /* Check if we have looped for long enough. */ if (getclockdiff(&st, &diffd)) return (2); if (diffd > resd) break; } while (1); #ifdef DEBUG fprintf(stderr, "%ju salsa20/8 cores performed in %f seconds\n", (uintmax_t)i, diffd); #endif /* We can do approximately i salsa20/8 cores per diffd seconds. */ *opps = i / diffd; return (0); } scrypt-1.2.0/lib/scryptenc/scryptenc_cpuperf.h000644 001751 001751 00000003306 12561447061 023171 0ustar00cpercivacperciva000000 000000 /*- * Copyright 2009 Colin Percival * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * This file was originally written by Colin Percival as part of the Tarsnap * online backup system. */ #ifndef _SCRYPTENC_CPUPERF_H_ #define _SCRYPTENC_CPUPERF_H_ /** * scryptenc_cpuperf(opps): * Estimate the number of salsa20/8 cores which can be executed per second, * and return the value via opps. */ int scryptenc_cpuperf(double *); #endif /* !_SCRYPTENC_CPUPERF_H_ */ scrypt-1.2.0/lib/crypto/crypto_scrypt.h000644 001751 001751 00000004066 12561447061 021671 0ustar00cpercivacperciva000000 000000 /*- * Copyright 2009 Colin Percival * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * This file was originally written by Colin Percival as part of the Tarsnap * online backup system. */ #ifndef _CRYPTO_SCRYPT_H_ #define _CRYPTO_SCRYPT_H_ #include #include /** * crypto_scrypt(passwd, passwdlen, salt, saltlen, N, r, p, buf, buflen): * Compute scrypt(passwd[0 .. passwdlen - 1], salt[0 .. saltlen - 1], N, r, * p, buflen) and write the result into buf. The parameters r, p, and buflen * must satisfy r * p < 2^30 and buflen <= (2^32 - 1) * 32. The parameter N * must be a power of 2 greater than 1. * * Return 0 on success; or -1 on error. */ int crypto_scrypt(const uint8_t *, size_t, const uint8_t *, size_t, uint64_t, uint32_t, uint32_t, uint8_t *, size_t); #endif /* !_CRYPTO_SCRYPT_H_ */ scrypt-1.2.0/lib/crypto/crypto_scrypt-ref.c000644 001751 001751 00000016526 12561447061 022442 0ustar00cpercivacperciva000000 000000 /*- * Copyright 2009 Colin Percival * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * This file was originally written by Colin Percival as part of the Tarsnap * online backup system. */ #include "scrypt_platform.h" #include #include #include #include #include "sha256.h" #include "sysendian.h" #include "crypto_scrypt.h" static void blkcpy(uint8_t *, uint8_t *, size_t); static void blkxor(uint8_t *, uint8_t *, size_t); static void salsa20_8(uint8_t[64]); static void blockmix_salsa8(uint8_t *, uint8_t *, size_t); static uint64_t integerify(uint8_t *, size_t); static void smix(uint8_t *, size_t, uint64_t, uint8_t *, uint8_t *); static void blkcpy(uint8_t * dest, uint8_t * src, size_t len) { size_t i; for (i = 0; i < len; i++) dest[i] = src[i]; } static void blkxor(uint8_t * dest, uint8_t * src, size_t len) { size_t i; for (i = 0; i < len; i++) dest[i] ^= src[i]; } /** * salsa20_8(B): * Apply the salsa20/8 core to the provided block. */ static void salsa20_8(uint8_t B[64]) { uint32_t B32[16]; uint32_t x[16]; size_t i; /* Convert little-endian values in. */ for (i = 0; i < 16; i++) B32[i] = le32dec(&B[i * 4]); /* Compute x = doubleround^4(B32). */ for (i = 0; i < 16; i++) x[i] = B32[i]; for (i = 0; i < 8; i += 2) { #define R(a,b) (((a) << (b)) | ((a) >> (32 - (b)))) /* Operate on columns. */ x[ 4] ^= R(x[ 0]+x[12], 7); x[ 8] ^= R(x[ 4]+x[ 0], 9); x[12] ^= R(x[ 8]+x[ 4],13); x[ 0] ^= R(x[12]+x[ 8],18); x[ 9] ^= R(x[ 5]+x[ 1], 7); x[13] ^= R(x[ 9]+x[ 5], 9); x[ 1] ^= R(x[13]+x[ 9],13); x[ 5] ^= R(x[ 1]+x[13],18); x[14] ^= R(x[10]+x[ 6], 7); x[ 2] ^= R(x[14]+x[10], 9); x[ 6] ^= R(x[ 2]+x[14],13); x[10] ^= R(x[ 6]+x[ 2],18); x[ 3] ^= R(x[15]+x[11], 7); x[ 7] ^= R(x[ 3]+x[15], 9); x[11] ^= R(x[ 7]+x[ 3],13); x[15] ^= R(x[11]+x[ 7],18); /* Operate on rows. */ x[ 1] ^= R(x[ 0]+x[ 3], 7); x[ 2] ^= R(x[ 1]+x[ 0], 9); x[ 3] ^= R(x[ 2]+x[ 1],13); x[ 0] ^= R(x[ 3]+x[ 2],18); x[ 6] ^= R(x[ 5]+x[ 4], 7); x[ 7] ^= R(x[ 6]+x[ 5], 9); x[ 4] ^= R(x[ 7]+x[ 6],13); x[ 5] ^= R(x[ 4]+x[ 7],18); x[11] ^= R(x[10]+x[ 9], 7); x[ 8] ^= R(x[11]+x[10], 9); x[ 9] ^= R(x[ 8]+x[11],13); x[10] ^= R(x[ 9]+x[ 8],18); x[12] ^= R(x[15]+x[14], 7); x[13] ^= R(x[12]+x[15], 9); x[14] ^= R(x[13]+x[12],13); x[15] ^= R(x[14]+x[13],18); #undef R } /* Compute B32 = B32 + x. */ for (i = 0; i < 16; i++) B32[i] += x[i]; /* Convert little-endian values out. */ for (i = 0; i < 16; i++) le32enc(&B[4 * i], B32[i]); } /** * blockmix_salsa8(B, Y, r): * Compute B = BlockMix_{salsa20/8, r}(B). The input B must be 128r bytes in * length; the temporary space Y must also be the same size. */ static void blockmix_salsa8(uint8_t * B, uint8_t * Y, size_t r) { uint8_t X[64]; size_t i; /* 1: X <-- B_{2r - 1} */ blkcpy(X, &B[(2 * r - 1) * 64], 64); /* 2: for i = 0 to 2r - 1 do */ for (i = 0; i < 2 * r; i++) { /* 3: X <-- H(X \xor B_i) */ blkxor(X, &B[i * 64], 64); salsa20_8(X); /* 4: Y_i <-- X */ blkcpy(&Y[i * 64], X, 64); } /* 6: B' <-- (Y_0, Y_2 ... Y_{2r-2}, Y_1, Y_3 ... Y_{2r-1}) */ for (i = 0; i < r; i++) blkcpy(&B[i * 64], &Y[(i * 2) * 64], 64); for (i = 0; i < r; i++) blkcpy(&B[(i + r) * 64], &Y[(i * 2 + 1) * 64], 64); } /** * integerify(B, r): * Return the result of parsing B_{2r-1} as a little-endian integer. */ static uint64_t integerify(uint8_t * B, size_t r) { uint8_t * X = &B[(2 * r - 1) * 64]; return (le64dec(X)); } /** * smix(B, r, N, V, XY): * Compute B = SMix_r(B, N). The input B must be 128r bytes in length; the * temporary storage V must be 128rN bytes in length; the temporary storage * XY must be 256r bytes in length. The value N must be a power of 2. */ static void smix(uint8_t * B, size_t r, uint64_t N, uint8_t * V, uint8_t * XY) { uint8_t * X = XY; uint8_t * Y = &XY[128 * r]; uint64_t i; uint64_t j; /* 1: X <-- B */ blkcpy(X, B, 128 * r); /* 2: for i = 0 to N - 1 do */ for (i = 0; i < N; i++) { /* 3: V_i <-- X */ blkcpy(&V[i * (128 * r)], X, 128 * r); /* 4: X <-- H(X) */ blockmix_salsa8(X, Y, r); } /* 6: for i = 0 to N - 1 do */ for (i = 0; i < N; i++) { /* 7: j <-- Integerify(X) mod N */ j = integerify(X, r) & (N - 1); /* 8: X <-- H(X \xor V_j) */ blkxor(X, &V[j * (128 * r)], 128 * r); blockmix_salsa8(X, Y, r); } /* 10: B' <-- X */ blkcpy(B, X, 128 * r); } /** * crypto_scrypt(passwd, passwdlen, salt, saltlen, N, r, p, buf, buflen): * Compute scrypt(passwd[0 .. passwdlen - 1], salt[0 .. saltlen - 1], N, r, * p, buflen) and write the result into buf. The parameters r, p, and buflen * must satisfy r * p < 2^30 and buflen <= (2^32 - 1) * 32. The parameter N * must be a power of 2. * * Return 0 on success; or -1 on error. */ int crypto_scrypt(const uint8_t * passwd, size_t passwdlen, const uint8_t * salt, size_t saltlen, uint64_t N, uint32_t _r, uint32_t _p, uint8_t * buf, size_t buflen) { uint8_t * B; uint8_t * V; uint8_t * XY; size_t r = _r, p = _p; uint32_t i; /* Sanity-check parameters. */ #if SIZE_MAX > UINT32_MAX if (buflen > (((uint64_t)(1) << 32) - 1) * 32) { errno = EFBIG; goto err0; } #endif if ((uint64_t)(r) * (uint64_t)(p) >= (1 << 30)) { errno = EFBIG; goto err0; } if (((N & (N - 1)) != 0) || (N == 0)) { errno = EINVAL; goto err0; } if ((r > SIZE_MAX / 128 / p) || #if SIZE_MAX / 256 <= UINT32_MAX (r > SIZE_MAX / 256) || #endif (N > SIZE_MAX / 128 / r)) { errno = ENOMEM; goto err0; } /* Allocate memory. */ if ((B = malloc(128 * r * p)) == NULL) goto err0; if ((XY = malloc(256 * r)) == NULL) goto err1; if ((V = malloc(128 * r * N)) == NULL) goto err2; /* 1: (B_0 ... B_{p-1}) <-- PBKDF2(P, S, 1, p * MFLen) */ PBKDF2_SHA256(passwd, passwdlen, salt, saltlen, 1, B, p * 128 * r); /* 2: for i = 0 to p - 1 do */ for (i = 0; i < p; i++) { /* 3: B_i <-- MF(B_i, N) */ smix(&B[i * 128 * r], r, N, V, XY); } /* 5: DK <-- PBKDF2(P, B, 1, dkLen) */ PBKDF2_SHA256(passwd, passwdlen, B, p * 128 * r, 1, buf, buflen); /* Free memory. */ free(V); free(XY); free(B); /* Success! */ return (0); err2: free(XY); err1: free(B); err0: /* Failure! */ return (-1); } scrypt-1.2.0/lib/crypto/crypto_scrypt.c000644 001751 001751 00000015601 12561447061 021661 0ustar00cpercivacperciva000000 000000 /*- * Copyright 2009 Colin Percival * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * This file was originally written by Colin Percival as part of the Tarsnap * online backup system. */ #include "scrypt_platform.h" #include #include #include #include #include #include #include "cpusupport.h" #include "sha256.h" #include "warnp.h" #include "crypto_scrypt_smix.h" #include "crypto_scrypt_smix_sse2.h" #include "crypto_scrypt.h" static void (*smix_func)(uint8_t *, size_t, uint64_t, void *, void *) = NULL; /** * _crypto_scrypt(passwd, passwdlen, salt, saltlen, N, r, p, buf, buflen, smix): * Perform the requested scrypt computation, using ${smix} as the smix routine. */ static int _crypto_scrypt(const uint8_t * passwd, size_t passwdlen, const uint8_t * salt, size_t saltlen, uint64_t N, uint32_t _r, uint32_t _p, uint8_t * buf, size_t buflen, void (*smix)(uint8_t *, size_t, uint64_t, void *, void *)) { void * B0, * V0, * XY0; uint8_t * B; uint32_t * V; uint32_t * XY; size_t r = _r, p = _p; uint32_t i; /* Sanity-check parameters. */ #if SIZE_MAX > UINT32_MAX if (buflen > (((uint64_t)(1) << 32) - 1) * 32) { errno = EFBIG; goto err0; } #endif if ((uint64_t)(r) * (uint64_t)(p) >= (1 << 30)) { errno = EFBIG; goto err0; } if (((N & (N - 1)) != 0) || (N < 2)) { errno = EINVAL; goto err0; } if ((r > SIZE_MAX / 128 / p) || #if SIZE_MAX / 256 <= UINT32_MAX (r > (SIZE_MAX - 64) / 256) || #endif (N > SIZE_MAX / 128 / r)) { errno = ENOMEM; goto err0; } /* Allocate memory. */ #ifdef HAVE_POSIX_MEMALIGN if ((errno = posix_memalign(&B0, 64, 128 * r * p)) != 0) goto err0; B = (uint8_t *)(B0); if ((errno = posix_memalign(&XY0, 64, 256 * r + 64)) != 0) goto err1; XY = (uint32_t *)(XY0); #if !defined(MAP_ANON) || !defined(HAVE_MMAP) if ((errno = posix_memalign(&V0, 64, 128 * r * N)) != 0) goto err2; V = (uint32_t *)(V0); #endif #else if ((B0 = malloc(128 * r * p + 63)) == NULL) goto err0; B = (uint8_t *)(((uintptr_t)(B0) + 63) & ~ (uintptr_t)(63)); if ((XY0 = malloc(256 * r + 64 + 63)) == NULL) goto err1; XY = (uint32_t *)(((uintptr_t)(XY0) + 63) & ~ (uintptr_t)(63)); #if !defined(MAP_ANON) || !defined(HAVE_MMAP) if ((V0 = malloc(128 * r * N + 63)) == NULL) goto err2; V = (uint32_t *)(((uintptr_t)(V0) + 63) & ~ (uintptr_t)(63)); #endif #endif #if defined(MAP_ANON) && defined(HAVE_MMAP) if ((V0 = mmap(NULL, 128 * r * N, PROT_READ | PROT_WRITE, #ifdef MAP_NOCORE MAP_ANON | MAP_PRIVATE | MAP_NOCORE, #else MAP_ANON | MAP_PRIVATE, #endif -1, 0)) == MAP_FAILED) goto err2; V = (uint32_t *)(V0); #endif /* 1: (B_0 ... B_{p-1}) <-- PBKDF2(P, S, 1, p * MFLen) */ PBKDF2_SHA256(passwd, passwdlen, salt, saltlen, 1, B, p * 128 * r); /* 2: for i = 0 to p - 1 do */ for (i = 0; i < p; i++) { /* 3: B_i <-- MF(B_i, N) */ (smix)(&B[i * 128 * r], r, N, V, XY); } /* 5: DK <-- PBKDF2(P, B, 1, dkLen) */ PBKDF2_SHA256(passwd, passwdlen, B, p * 128 * r, 1, buf, buflen); /* Free memory. */ #if defined(MAP_ANON) && defined(HAVE_MMAP) if (munmap(V0, 128 * r * N)) goto err2; #else free(V0); #endif free(XY0); free(B0); /* Success! */ return (0); err2: free(XY0); err1: free(B0); err0: /* Failure! */ return (-1); } #define TESTLEN 64 static struct scrypt_test { const char * passwd; const char * salt; uint64_t N; uint32_t r; uint32_t p; uint8_t result[TESTLEN]; } testcase = { .passwd = "pleaseletmein", .salt = "SodiumChloride", .N = 16, .r = 8, .p = 1, .result = { 0x25, 0xa9, 0xfa, 0x20, 0x7f, 0x87, 0xca, 0x09, 0xa4, 0xef, 0x8b, 0x9f, 0x77, 0x7a, 0xca, 0x16, 0xbe, 0xb7, 0x84, 0xae, 0x18, 0x30, 0xbf, 0xbf, 0xd3, 0x83, 0x25, 0xaa, 0xbb, 0x93, 0x77, 0xdf, 0x1b, 0xa7, 0x84, 0xd7, 0x46, 0xea, 0x27, 0x3b, 0xf5, 0x16, 0xa4, 0x6f, 0xbf, 0xac, 0xf5, 0x11, 0xc5, 0xbe, 0xba, 0x4c, 0x4a, 0xb3, 0xac, 0xc7, 0xfa, 0x6f, 0x46, 0x0b, 0x6c, 0x0f, 0x47, 0x7b, } }; static int testsmix(void (*smix)(uint8_t *, size_t, uint64_t, void *, void *)) { uint8_t hbuf[TESTLEN]; /* Perform the computation. */ if (_crypto_scrypt( (const uint8_t *)testcase.passwd, strlen(testcase.passwd), (const uint8_t *)testcase.salt, strlen(testcase.salt), testcase.N, testcase.r, testcase.p, hbuf, TESTLEN, smix)) return (-1); /* Does it match? */ return (memcmp(testcase.result, hbuf, TESTLEN)); } static void selectsmix(void) { #ifdef CPUSUPPORT_X86_SSE2 /* If we're running on an SSE2-capable CPU, try that code. */ if (cpusupport_x86_sse2()) { /* If SSE2ized smix works, use it. */ if (!testsmix(crypto_scrypt_smix_sse2)) { smix_func = crypto_scrypt_smix_sse2; return; } warn0("Disabling broken SSE2 scrypt support - please report bug!"); } #endif /* If generic smix works, use it. */ if (!testsmix(crypto_scrypt_smix)) { smix_func = crypto_scrypt_smix; return; } warn0("Generic scrypt code is broken - please report bug!"); /* If we get here, something really bad happened. */ abort(); } /** * crypto_scrypt(passwd, passwdlen, salt, saltlen, N, r, p, buf, buflen): * Compute scrypt(passwd[0 .. passwdlen - 1], salt[0 .. saltlen - 1], N, r, * p, buflen) and write the result into buf. The parameters r, p, and buflen * must satisfy r * p < 2^30 and buflen <= (2^32 - 1) * 32. The parameter N * must be a power of 2 greater than 1. * * Return 0 on success; or -1 on error. */ int crypto_scrypt(const uint8_t * passwd, size_t passwdlen, const uint8_t * salt, size_t saltlen, uint64_t N, uint32_t _r, uint32_t _p, uint8_t * buf, size_t buflen) { if (smix_func == NULL) selectsmix(); return (_crypto_scrypt(passwd, passwdlen, salt, saltlen, N, _r, _p, buf, buflen, smix_func)); } scrypt-1.2.0/lib/crypto/crypto_scrypt_smix.h000644 001751 001751 00000001027 12561447061 022723 0ustar00cpercivacperciva000000 000000 #ifndef _CRYPTO_SCRYPT_SMIX_H_ #define _CRYPTO_SCRYPT_SMIX_H_ /** * crypto_scrypt_smix(B, r, N, V, XY): * Compute B = SMix_r(B, N). The input B must be 128r bytes in length; * the temporary storage V must be 128rN bytes in length; the temporary * storage XY must be 256r + 64 bytes in length. The value N must be a * power of 2 greater than 1. The arrays B, V, and XY must be aligned to a * multiple of 64 bytes. */ void crypto_scrypt_smix(uint8_t *, size_t, uint64_t, void *, void *); #endif /* !_CRYPTO_SCRYPT_SMIX_H_ */ scrypt-1.2.0/lib/crypto/crypto_scrypt_smix_sse2.c000644 001751 001751 00000015444 12561447061 023662 0ustar00cpercivacperciva000000 000000 /*- * Copyright 2009 Colin Percival * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * This file was originally written by Colin Percival as part of the Tarsnap * online backup system. */ #include "cpusupport.h" #ifdef CPUSUPPORT_X86_SSE2 #include #include #include "sysendian.h" #include "crypto_scrypt_smix_sse2.h" static void blkcpy(void *, const void *, size_t); static void blkxor(void *, const void *, size_t); static void salsa20_8(__m128i *); static void blockmix_salsa8(const __m128i *, __m128i *, __m128i *, size_t); static uint64_t integerify(const void *, size_t); static void blkcpy(void * dest, const void * src, size_t len) { __m128i * D = dest; const __m128i * S = src; size_t L = len / 16; size_t i; for (i = 0; i < L; i++) D[i] = S[i]; } static void blkxor(void * dest, const void * src, size_t len) { __m128i * D = dest; const __m128i * S = src; size_t L = len / 16; size_t i; for (i = 0; i < L; i++) D[i] = _mm_xor_si128(D[i], S[i]); } /** * salsa20_8(B): * Apply the salsa20/8 core to the provided block. */ static void salsa20_8(__m128i B[4]) { __m128i X0, X1, X2, X3; __m128i T; size_t i; X0 = B[0]; X1 = B[1]; X2 = B[2]; X3 = B[3]; for (i = 0; i < 8; i += 2) { /* Operate on "columns". */ T = _mm_add_epi32(X0, X3); X1 = _mm_xor_si128(X1, _mm_slli_epi32(T, 7)); X1 = _mm_xor_si128(X1, _mm_srli_epi32(T, 25)); T = _mm_add_epi32(X1, X0); X2 = _mm_xor_si128(X2, _mm_slli_epi32(T, 9)); X2 = _mm_xor_si128(X2, _mm_srli_epi32(T, 23)); T = _mm_add_epi32(X2, X1); X3 = _mm_xor_si128(X3, _mm_slli_epi32(T, 13)); X3 = _mm_xor_si128(X3, _mm_srli_epi32(T, 19)); T = _mm_add_epi32(X3, X2); X0 = _mm_xor_si128(X0, _mm_slli_epi32(T, 18)); X0 = _mm_xor_si128(X0, _mm_srli_epi32(T, 14)); /* Rearrange data. */ X1 = _mm_shuffle_epi32(X1, 0x93); X2 = _mm_shuffle_epi32(X2, 0x4E); X3 = _mm_shuffle_epi32(X3, 0x39); /* Operate on "rows". */ T = _mm_add_epi32(X0, X1); X3 = _mm_xor_si128(X3, _mm_slli_epi32(T, 7)); X3 = _mm_xor_si128(X3, _mm_srli_epi32(T, 25)); T = _mm_add_epi32(X3, X0); X2 = _mm_xor_si128(X2, _mm_slli_epi32(T, 9)); X2 = _mm_xor_si128(X2, _mm_srli_epi32(T, 23)); T = _mm_add_epi32(X2, X3); X1 = _mm_xor_si128(X1, _mm_slli_epi32(T, 13)); X1 = _mm_xor_si128(X1, _mm_srli_epi32(T, 19)); T = _mm_add_epi32(X1, X2); X0 = _mm_xor_si128(X0, _mm_slli_epi32(T, 18)); X0 = _mm_xor_si128(X0, _mm_srli_epi32(T, 14)); /* Rearrange data. */ X1 = _mm_shuffle_epi32(X1, 0x39); X2 = _mm_shuffle_epi32(X2, 0x4E); X3 = _mm_shuffle_epi32(X3, 0x93); } B[0] = _mm_add_epi32(B[0], X0); B[1] = _mm_add_epi32(B[1], X1); B[2] = _mm_add_epi32(B[2], X2); B[3] = _mm_add_epi32(B[3], X3); } /** * blockmix_salsa8(Bin, Bout, X, r): * Compute Bout = BlockMix_{salsa20/8, r}(Bin). The input Bin must be 128r * bytes in length; the output Bout must also be the same size. The * temporary space X must be 64 bytes. */ static void blockmix_salsa8(const __m128i * Bin, __m128i * Bout, __m128i * X, size_t r) { size_t i; /* 1: X <-- B_{2r - 1} */ blkcpy(X, &Bin[8 * r - 4], 64); /* 2: for i = 0 to 2r - 1 do */ for (i = 0; i < r; i++) { /* 3: X <-- H(X \xor B_i) */ blkxor(X, &Bin[i * 8], 64); salsa20_8(X); /* 4: Y_i <-- X */ /* 6: B' <-- (Y_0, Y_2 ... Y_{2r-2}, Y_1, Y_3 ... Y_{2r-1}) */ blkcpy(&Bout[i * 4], X, 64); /* 3: X <-- H(X \xor B_i) */ blkxor(X, &Bin[i * 8 + 4], 64); salsa20_8(X); /* 4: Y_i <-- X */ /* 6: B' <-- (Y_0, Y_2 ... Y_{2r-2}, Y_1, Y_3 ... Y_{2r-1}) */ blkcpy(&Bout[(r + i) * 4], X, 64); } } /** * integerify(B, r): * Return the result of parsing B_{2r-1} as a little-endian integer. */ static uint64_t integerify(const void * B, size_t r) { const uint32_t * X = (const void *)((uintptr_t)(B) + (2 * r - 1) * 64); return (((uint64_t)(X[13]) << 32) + X[0]); } /** * crypto_scrypt_smix_sse2(B, r, N, V, XY): * Compute B = SMix_r(B, N). The input B must be 128r bytes in length; * the temporary storage V must be 128rN bytes in length; the temporary * storage XY must be 256r + 64 bytes in length. The value N must be a * power of 2 greater than 1. The arrays B, V, and XY must be aligned to a * multiple of 64 bytes. * * Use SSE2 instructions. */ void crypto_scrypt_smix_sse2(uint8_t * B, size_t r, uint64_t N, void * V, void * XY) { __m128i * X = XY; __m128i * Y = (void *)((uintptr_t)(XY) + 128 * r); __m128i * Z = (void *)((uintptr_t)(XY) + 256 * r); uint32_t * X32 = (void *)X; uint64_t i, j; size_t k; /* 1: X <-- B */ for (k = 0; k < 2 * r; k++) { for (i = 0; i < 16; i++) { X32[k * 16 + i] = le32dec(&B[(k * 16 + (i * 5 % 16)) * 4]); } } /* 2: for i = 0 to N - 1 do */ for (i = 0; i < N; i += 2) { /* 3: V_i <-- X */ blkcpy((void *)((uintptr_t)(V) + i * 128 * r), X, 128 * r); /* 4: X <-- H(X) */ blockmix_salsa8(X, Y, Z, r); /* 3: V_i <-- X */ blkcpy((void *)((uintptr_t)(V) + (i + 1) * 128 * r), Y, 128 * r); /* 4: X <-- H(X) */ blockmix_salsa8(Y, X, Z, r); } /* 6: for i = 0 to N - 1 do */ for (i = 0; i < N; i += 2) { /* 7: j <-- Integerify(X) mod N */ j = integerify(X, r) & (N - 1); /* 8: X <-- H(X \xor V_j) */ blkxor(X, (void *)((uintptr_t)(V) + j * 128 * r), 128 * r); blockmix_salsa8(X, Y, Z, r); /* 7: j <-- Integerify(X) mod N */ j = integerify(Y, r) & (N - 1); /* 8: X <-- H(X \xor V_j) */ blkxor(Y, (void *)((uintptr_t)(V) + j * 128 * r), 128 * r); blockmix_salsa8(Y, X, Z, r); } /* 10: B' <-- X */ for (k = 0; k < 2 * r; k++) { for (i = 0; i < 16; i++) { le32enc(&B[(k * 16 + (i * 5 % 16)) * 4], X32[k * 16 + i]); } } } #endif /* CPUSUPPORT_X86_SSE2 */ scrypt-1.2.0/lib/crypto/crypto_scrypt_smix.c000644 001751 001751 00000014100 12561447061 022712 0ustar00cpercivacperciva000000 000000 /*- * Copyright 2009 Colin Percival * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * This file was originally written by Colin Percival as part of the Tarsnap * online backup system. */ #include #include #include "sha256.h" #include "sysendian.h" #include "crypto_scrypt_smix.h" static void blkcpy(void *, const void *, size_t); static void blkxor(void *, const void *, size_t); static void salsa20_8(uint32_t[16]); static void blockmix_salsa8(const uint32_t *, uint32_t *, uint32_t *, size_t); static uint64_t integerify(const void *, size_t); static void blkcpy(void * dest, const void * src, size_t len) { size_t * D = dest; const size_t * S = src; size_t L = len / sizeof(size_t); size_t i; for (i = 0; i < L; i++) D[i] = S[i]; } static void blkxor(void * dest, const void * src, size_t len) { size_t * D = dest; const size_t * S = src; size_t L = len / sizeof(size_t); size_t i; for (i = 0; i < L; i++) D[i] ^= S[i]; } /** * salsa20_8(B): * Apply the salsa20/8 core to the provided block. */ static void salsa20_8(uint32_t B[16]) { uint32_t x[16]; size_t i; blkcpy(x, B, 64); for (i = 0; i < 8; i += 2) { #define R(a,b) (((a) << (b)) | ((a) >> (32 - (b)))) /* Operate on columns. */ x[ 4] ^= R(x[ 0]+x[12], 7); x[ 8] ^= R(x[ 4]+x[ 0], 9); x[12] ^= R(x[ 8]+x[ 4],13); x[ 0] ^= R(x[12]+x[ 8],18); x[ 9] ^= R(x[ 5]+x[ 1], 7); x[13] ^= R(x[ 9]+x[ 5], 9); x[ 1] ^= R(x[13]+x[ 9],13); x[ 5] ^= R(x[ 1]+x[13],18); x[14] ^= R(x[10]+x[ 6], 7); x[ 2] ^= R(x[14]+x[10], 9); x[ 6] ^= R(x[ 2]+x[14],13); x[10] ^= R(x[ 6]+x[ 2],18); x[ 3] ^= R(x[15]+x[11], 7); x[ 7] ^= R(x[ 3]+x[15], 9); x[11] ^= R(x[ 7]+x[ 3],13); x[15] ^= R(x[11]+x[ 7],18); /* Operate on rows. */ x[ 1] ^= R(x[ 0]+x[ 3], 7); x[ 2] ^= R(x[ 1]+x[ 0], 9); x[ 3] ^= R(x[ 2]+x[ 1],13); x[ 0] ^= R(x[ 3]+x[ 2],18); x[ 6] ^= R(x[ 5]+x[ 4], 7); x[ 7] ^= R(x[ 6]+x[ 5], 9); x[ 4] ^= R(x[ 7]+x[ 6],13); x[ 5] ^= R(x[ 4]+x[ 7],18); x[11] ^= R(x[10]+x[ 9], 7); x[ 8] ^= R(x[11]+x[10], 9); x[ 9] ^= R(x[ 8]+x[11],13); x[10] ^= R(x[ 9]+x[ 8],18); x[12] ^= R(x[15]+x[14], 7); x[13] ^= R(x[12]+x[15], 9); x[14] ^= R(x[13]+x[12],13); x[15] ^= R(x[14]+x[13],18); #undef R } for (i = 0; i < 16; i++) B[i] += x[i]; } /** * blockmix_salsa8(Bin, Bout, X, r): * Compute Bout = BlockMix_{salsa20/8, r}(Bin). The input Bin must be 128r * bytes in length; the output Bout must also be the same size. The * temporary space X must be 64 bytes. */ static void blockmix_salsa8(const uint32_t * Bin, uint32_t * Bout, uint32_t * X, size_t r) { size_t i; /* 1: X <-- B_{2r - 1} */ blkcpy(X, &Bin[(2 * r - 1) * 16], 64); /* 2: for i = 0 to 2r - 1 do */ for (i = 0; i < 2 * r; i += 2) { /* 3: X <-- H(X \xor B_i) */ blkxor(X, &Bin[i * 16], 64); salsa20_8(X); /* 4: Y_i <-- X */ /* 6: B' <-- (Y_0, Y_2 ... Y_{2r-2}, Y_1, Y_3 ... Y_{2r-1}) */ blkcpy(&Bout[i * 8], X, 64); /* 3: X <-- H(X \xor B_i) */ blkxor(X, &Bin[i * 16 + 16], 64); salsa20_8(X); /* 4: Y_i <-- X */ /* 6: B' <-- (Y_0, Y_2 ... Y_{2r-2}, Y_1, Y_3 ... Y_{2r-1}) */ blkcpy(&Bout[i * 8 + r * 16], X, 64); } } /** * integerify(B, r): * Return the result of parsing B_{2r-1} as a little-endian integer. */ static uint64_t integerify(const void * B, size_t r) { const uint32_t * X = (const void *)((uintptr_t)(B) + (2 * r - 1) * 64); return (((uint64_t)(X[1]) << 32) + X[0]); } /** * crypto_scrypt_smix(B, r, N, V, XY): * Compute B = SMix_r(B, N). The input B must be 128r bytes in length; * the temporary storage V must be 128rN bytes in length; the temporary * storage XY must be 256r + 64 bytes in length. The value N must be a * power of 2 greater than 1. The arrays B, V, and XY must be aligned to a * multiple of 64 bytes. */ void crypto_scrypt_smix(uint8_t * B, size_t r, uint64_t N, void * _V, void * XY) { uint32_t * X = XY; uint32_t * Y = (void *)((uint8_t *)(XY) + 128 * r); uint32_t * Z = (void *)((uint8_t *)(XY) + 256 * r); uint32_t * V = _V; uint64_t i; uint64_t j; size_t k; /* 1: X <-- B */ for (k = 0; k < 32 * r; k++) X[k] = le32dec(&B[4 * k]); /* 2: for i = 0 to N - 1 do */ for (i = 0; i < N; i += 2) { /* 3: V_i <-- X */ blkcpy(&V[i * (32 * r)], X, 128 * r); /* 4: X <-- H(X) */ blockmix_salsa8(X, Y, Z, r); /* 3: V_i <-- X */ blkcpy(&V[(i + 1) * (32 * r)], Y, 128 * r); /* 4: X <-- H(X) */ blockmix_salsa8(Y, X, Z, r); } /* 6: for i = 0 to N - 1 do */ for (i = 0; i < N; i += 2) { /* 7: j <-- Integerify(X) mod N */ j = integerify(X, r) & (N - 1); /* 8: X <-- H(X \xor V_j) */ blkxor(X, &V[j * (32 * r)], 128 * r); blockmix_salsa8(X, Y, Z, r); /* 7: j <-- Integerify(X) mod N */ j = integerify(Y, r) & (N - 1); /* 8: X <-- H(X \xor V_j) */ blkxor(Y, &V[j * (32 * r)], 128 * r); blockmix_salsa8(Y, X, Z, r); } /* 10: B' <-- X */ for (k = 0; k < 32 * r; k++) le32enc(&B[4 * k], X[k]); } scrypt-1.2.0/lib/crypto/crypto_scrypt_smix_sse2.h000644 001751 001751 00000001115 12561447061 023655 0ustar00cpercivacperciva000000 000000 #ifndef _CRYPTO_SCRYPT_SMIX_SSE2_H_ #define _CRYPTO_SCRYPT_SMIX_SSE2_H_ /** * crypto_scrypt_smix_sse2(B, r, N, V, XY): * Compute B = SMix_r(B, N). The input B must be 128r bytes in length; * the temporary storage V must be 128rN bytes in length; the temporary * storage XY must be 256r + 64 bytes in length. The value N must be a * power of 2 greater than 1. The arrays B, V, and XY must be aligned to a * multiple of 64 bytes. * * Use SSE2 instructions. */ void crypto_scrypt_smix_sse2(uint8_t *, size_t, uint64_t, void *, void *); #endif /* !_CRYPTO_SCRYPT_SMIX_SSE2_H_ */ scrypt-1.2.0/libcperciva/alg/000755 001751 001751 00000000000 12561447061 017526 5ustar00cpercivacperciva000000 000000 scrypt-1.2.0/libcperciva/cpusupport/000755 001751 001751 00000000000 12561447061 021207 5ustar00cpercivacperciva000000 000000 scrypt-1.2.0/libcperciva/crypto/000755 001751 001751 00000000000 12561447061 020303 5ustar00cpercivacperciva000000 000000 scrypt-1.2.0/libcperciva/util/000755 001751 001751 00000000000 12561447061 017740 5ustar00cpercivacperciva000000 000000 scrypt-1.2.0/libcperciva/COPYRIGHT000644 001751 001751 00000002635 12561447061 020264 0ustar00cpercivacperciva000000 000000 The code and documentation in this directory ("libcperciva") is distributed under the following terms: Copyright 2005-2014 Colin Percival. All rights reserved. Copyright 2014 Sean Kelly. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. scrypt-1.2.0/libcperciva/util/entropy.c000644 001751 001751 00000002743 12561447061 021612 0ustar00cpercivacperciva000000 000000 #include #include #include #include #include "warnp.h" #include "entropy.h" /** * XXX Portability * XXX We obtain random bytes from the operating system by opening * XXX /dev/urandom and reading them from that device; this works on * XXX modern UNIX-like operating systems but not on systems like * XXX win32 where there is no concept of /dev/urandom. */ /** * entropy_read(buf, buflen): * Fill the given buffer with random bytes provided by the operating system. */ int entropy_read(uint8_t * buf, size_t buflen) { int fd; ssize_t lenread; /* Sanity-check the buffer size. */ if (buflen > SSIZE_MAX) { warn0("Programmer error: " "Trying to read insane amount of random data: %zu", buflen); goto err0; } /* Open /dev/urandom. */ if ((fd = open("/dev/urandom", O_RDONLY)) == -1) { warnp("open(/dev/urandom)"); goto err0; } /* Read bytes until we have filled the buffer. */ while (buflen > 0) { if ((lenread = read(fd, buf, buflen)) == -1) { warnp("read(/dev/urandom)"); goto err1; } /* The random device should never EOF. */ if (lenread == 0) { warn0("EOF on /dev/urandom?"); goto err1; } /* We've filled a portion of the buffer. */ buf += lenread; buflen -= lenread; } /* Close the device. */ while (close(fd) == -1) { if (errno != EINTR) { warnp("close(/dev/urandom)"); goto err0; } } /* Success! */ return (0); err1: close(fd); err0: /* Failure! */ return (-1); } scrypt-1.2.0/libcperciva/util/insecure_memzero.h000644 001751 001751 00000002724 12561447061 023471 0ustar00cpercivacperciva000000 000000 #ifndef _INSECURE_MEMZERO_H_ #define _INSECURE_MEMZERO_H_ #include /* Pointer to memory-zeroing function. */ extern void (* volatile insecure_memzero_ptr)(volatile void *, size_t); /** * insecure_memzero(buf, len): * Attempt to zero ${len} bytes at ${buf} in spite of optimizing compilers' * best (standards-compliant) attempts to remove the buffer-zeroing. In * particular, to avoid performing the zeroing, a compiler would need to * use optimistic devirtualization; recognize that non-volatile objects do not * need to be treated as volatile, even if they are accessed via volatile * qualified pointers; and perform link-time optimization; in addition to the * dead-code elimination which often causes buffer-zeroing to be elided. * * Note however that zeroing a buffer does not guarantee that the data held * in the buffer is not stored elsewhere; in particular, there may be copies * held in CPU registers or in anonymous allocations on the stack, even if * every named variable is successfully sanitized. Solving the "wipe data * from the system" problem will require a C language extension which does not * yet exist. * * For more information, see: * http://www.daemonology.net/blog/2014-09-04-how-to-zero-a-buffer.html * http://www.daemonology.net/blog/2014-09-06-zeroing-buffers-is-insufficient.html */ static inline void insecure_memzero(volatile void * buf, size_t len) { (insecure_memzero_ptr)(buf, len); } #endif /* !_INSECURE_MEMZERO_H_ */ scrypt-1.2.0/libcperciva/util/readpass.c000644 001751 001751 00000012070 12561447061 021706 0ustar00cpercivacperciva000000 000000 #include #include #include #include #include #include #include "insecure_memzero.h" #include "warnp.h" #include "readpass.h" #define MAXPASSLEN 2048 /* Signals we need to block. */ static const int badsigs[] = { SIGALRM, SIGHUP, SIGINT, SIGPIPE, SIGQUIT, SIGTERM, SIGTSTP, SIGTTIN, SIGTTOU }; #define NSIGS sizeof(badsigs)/sizeof(badsigs[0]) /* Highest signal number we care about. */ #define MAX2(a, b) ((a) > (b) ? (a) : (b)) #define MAX4(a, b, c, d) MAX2(MAX2(a, b), MAX2(c, d)) #define MAX8(a, b, c, d, e, f, g, h) MAX2(MAX4(a, b, c, d), MAX4(e, f, g, h)) #define MAXBADSIG MAX2(SIGALRM, MAX8(SIGHUP, SIGINT, SIGPIPE, SIGQUIT, \ SIGTERM, SIGTSTP, SIGTTIN, SIGTTOU)) /* Has a signal of this type been received? */ static volatile sig_atomic_t gotsig[MAXBADSIG + 1]; /* Signal handler. */ static void handle(int sig) { gotsig[sig] = 1; } /** * readpass(passwd, prompt, confirmprompt, devtty) * If ${devtty} is non-zero, read a password from /dev/tty if possible; if * not, read from stdin. If reading from a tty (either /dev/tty or stdin), * disable echo and prompt the user by printing ${prompt} to stderr. If * ${confirmprompt} is non-NULL, read a second password (prompting if a * terminal is being used) and repeat until the user enters the same password * twice. Return the password as a malloced NUL-terminated string via * ${passwd}. */ int readpass(char ** passwd, const char * prompt, const char * confirmprompt, int devtty) { FILE * readfrom; char passbuf[MAXPASSLEN]; char confpassbuf[MAXPASSLEN]; struct sigaction sa, savedsa[NSIGS]; struct termios term, term_old; size_t i; int usingtty; /* * If devtty != 0, try to open /dev/tty; if that fails, or if devtty * is zero, we'll read the password from stdin instead. */ if ((devtty == 0) || ((readfrom = fopen("/dev/tty", "r")) == NULL)) readfrom = stdin; /* We have not received any signals yet. */ for (i = 0; i <= MAXBADSIG; i++) gotsig[i] = 0; /* * If we receive a signal while we're reading the password, we might * end up with echo disabled; to prevent this, we catch the signals * here, and we'll re-send them to ourselves later after we re-enable * terminal echo. */ sa.sa_handler = handle; sa.sa_flags = 0; sigemptyset(&sa.sa_mask); for (i = 0; i < NSIGS; i++) sigaction(badsigs[i], &sa, &savedsa[i]); /* If we're reading from a terminal, try to disable echo. */ if ((usingtty = isatty(fileno(readfrom))) != 0) { if (tcgetattr(fileno(readfrom), &term_old)) { warnp("Cannot read terminal settings"); goto err2; } memcpy(&term, &term_old, sizeof(struct termios)); term.c_lflag = (term.c_lflag & ~ECHO) | ECHONL; if (tcsetattr(fileno(readfrom), TCSANOW, &term)) { warnp("Cannot set terminal settings"); goto err2; } } retry: /* If we have a terminal, prompt the user to enter the password. */ if (usingtty) fprintf(stderr, "%s: ", prompt); /* Read the password. */ if (fgets(passbuf, MAXPASSLEN, readfrom) == NULL) { warnp("Cannot read password"); goto err3; } /* Confirm the password if necessary. */ if (confirmprompt != NULL) { if (usingtty) fprintf(stderr, "%s: ", confirmprompt); if (fgets(confpassbuf, MAXPASSLEN, readfrom) == NULL) { warnp("Cannot read password"); goto err3; } if (strcmp(passbuf, confpassbuf)) { fprintf(stderr, "Passwords mismatch, please try again\n"); goto retry; } } /* Terminate the string at the first "\r" or "\n" (if any). */ passbuf[strcspn(passbuf, "\r\n")] = '\0'; /* If we changed terminal settings, reset them. */ if (usingtty) tcsetattr(fileno(readfrom), TCSANOW, &term_old); /* Restore old signals. */ for (i = 0; i < NSIGS; i++) sigaction(badsigs[i], &savedsa[i], NULL); /* If we intercepted a signal, re-issue it. */ for (i = 0; i < NSIGS; i++) { if (gotsig[badsigs[i]]) raise(badsigs[i]); } /* Close /dev/tty if we opened it. */ if (readfrom != stdin) fclose(readfrom); /* Copy the password out. */ if ((*passwd = strdup(passbuf)) == NULL) { warnp("Cannot allocate memory"); goto err1; } /* * Zero any stored passwords. This is not guaranteed to work, since a * "sufficiently intelligent" compiler can optimize these out due to * the values not being accessed again; and even if we outwitted the * compiler, all we can do is ensure that *a* buffer is zeroed but * not that it is the only buffer containing the data in question. * Unfortunately the C standard does not provide any way to mark data * as "sensitive" in order to prevent extra copies being sprinkled * around the implementation address space. */ insecure_memzero(passbuf, MAXPASSLEN); insecure_memzero(confpassbuf, MAXPASSLEN); /* Success! */ return (0); err3: /* Reset terminal settings if necessary. */ if (usingtty) tcsetattr(fileno(readfrom), TCSAFLUSH, &term_old); err2: /* Close /dev/tty if we opened it. */ if (readfrom != stdin) fclose(readfrom); err1: /* Zero any stored passwords. */ insecure_memzero(passbuf, MAXPASSLEN); insecure_memzero(confpassbuf, MAXPASSLEN); /* Failure! */ return (-1); } scrypt-1.2.0/libcperciva/util/readpass.h000644 001751 001751 00000001425 12561447061 021715 0ustar00cpercivacperciva000000 000000 #ifndef _READPASS_H_ #define _READPASS_H_ /* Avoid namespace collisions with other "readpass" functions. */ #ifdef readpass #undef readpass #endif #define readpass libcperciva_readpass /** * readpass(passwd, prompt, confirmprompt, devtty) * If ${devtty} is non-zero, read a password from /dev/tty if possible; if * not, read from stdin. If reading from a tty (either /dev/tty or stdin), * disable echo and prompt the user by printing ${prompt} to stderr. If * ${confirmprompt} is non-NULL, read a second password (prompting if a * terminal is being used) and repeat until the user enters the same password * twice. Return the password as a malloced NUL-terminated string via * ${passwd}. */ int readpass(char **, const char *, const char *, int); #endif /* !_READPASS_H_ */ scrypt-1.2.0/libcperciva/util/sysendian.h000644 001751 001751 00000006113 12561447061 022107 0ustar00cpercivacperciva000000 000000 #ifndef _SYSENDIAN_H_ #define _SYSENDIAN_H_ #include /* Avoid namespace collisions with BSD . */ #define be16dec libcperciva_be16dec #define be16enc libcperciva_be16enc #define be32dec libcperciva_be32dec #define be32enc libcperciva_be32enc #define be64dec libcperciva_be64dec #define be64enc libcperciva_be64enc #define le16dec libcperciva_le16dec #define le16enc libcperciva_le16enc #define le32dec libcperciva_le32dec #define le32enc libcperciva_le32enc #define le64dec libcperciva_le64dec #define le64enc libcperciva_le64enc static inline uint16_t be16dec(const void * pp) { const uint8_t * p = (uint8_t const *)pp; return ((uint16_t)(p[1]) + ((uint16_t)(p[0]) << 8)); } static inline void be16enc(void * pp, uint16_t x) { uint8_t * p = (uint8_t *)pp; p[1] = x & 0xff; p[0] = (x >> 8) & 0xff; } static inline uint32_t be32dec(const void * pp) { const uint8_t * p = (uint8_t const *)pp; return ((uint32_t)(p[3]) + ((uint32_t)(p[2]) << 8) + ((uint32_t)(p[1]) << 16) + ((uint32_t)(p[0]) << 24)); } static inline void be32enc(void * pp, uint32_t x) { uint8_t * p = (uint8_t *)pp; p[3] = x & 0xff; p[2] = (x >> 8) & 0xff; p[1] = (x >> 16) & 0xff; p[0] = (x >> 24) & 0xff; } static inline uint64_t be64dec(const void * pp) { const uint8_t * p = (uint8_t const *)pp; return ((uint64_t)(p[7]) + ((uint64_t)(p[6]) << 8) + ((uint64_t)(p[5]) << 16) + ((uint64_t)(p[4]) << 24) + ((uint64_t)(p[3]) << 32) + ((uint64_t)(p[2]) << 40) + ((uint64_t)(p[1]) << 48) + ((uint64_t)(p[0]) << 56)); } static inline void be64enc(void * pp, uint64_t x) { uint8_t * p = (uint8_t *)pp; p[7] = x & 0xff; p[6] = (x >> 8) & 0xff; p[5] = (x >> 16) & 0xff; p[4] = (x >> 24) & 0xff; p[3] = (x >> 32) & 0xff; p[2] = (x >> 40) & 0xff; p[1] = (x >> 48) & 0xff; p[0] = (x >> 56) & 0xff; } static inline uint16_t le16dec(const void * pp) { const uint8_t * p = (uint8_t const *)pp; return ((uint16_t)(p[0]) + ((uint16_t)(p[1]) << 8)); } static inline void le16enc(void * pp, uint16_t x) { uint8_t * p = (uint8_t *)pp; p[0] = x & 0xff; p[1] = (x >> 8) & 0xff; } static inline uint32_t le32dec(const void * pp) { const uint8_t * p = (uint8_t const *)pp; return ((uint32_t)(p[0]) + ((uint32_t)(p[1]) << 8) + ((uint32_t)(p[2]) << 16) + ((uint32_t)(p[3]) << 24)); } static inline void le32enc(void * pp, uint32_t x) { uint8_t * p = (uint8_t *)pp; p[0] = x & 0xff; p[1] = (x >> 8) & 0xff; p[2] = (x >> 16) & 0xff; p[3] = (x >> 24) & 0xff; } static inline uint64_t le64dec(const void * pp) { const uint8_t * p = (uint8_t const *)pp; return ((uint64_t)(p[0]) + ((uint64_t)(p[1]) << 8) + ((uint64_t)(p[2]) << 16) + ((uint64_t)(p[3]) << 24) + ((uint64_t)(p[4]) << 32) + ((uint64_t)(p[5]) << 40) + ((uint64_t)(p[6]) << 48) + ((uint64_t)(p[7]) << 56)); } static inline void le64enc(void * pp, uint64_t x) { uint8_t * p = (uint8_t *)pp; p[0] = x & 0xff; p[1] = (x >> 8) & 0xff; p[2] = (x >> 16) & 0xff; p[3] = (x >> 24) & 0xff; p[4] = (x >> 32) & 0xff; p[5] = (x >> 40) & 0xff; p[6] = (x >> 48) & 0xff; p[7] = (x >> 56) & 0xff; } #endif /* !_SYSENDIAN_H_ */ scrypt-1.2.0/libcperciva/util/warnp.c000644 001751 001751 00000002477 12561447061 021245 0ustar00cpercivacperciva000000 000000 #include #include #include #include #include #include "warnp.h" static int initialized = 0; static char * name = NULL; /* Free the name string. */ static void done(void) { free(name); name = NULL; } /** * warnp_setprogname(progname): * Set the program name to be used by warn() and warnx() to ${progname}. */ void warnp_setprogname(const char * progname) { const char * p; /* Free the name if we already have one. */ free(name); /* Find the last segment of the program name. */ for (p = progname; progname[0] != '\0'; progname++) if (progname[0] == '/') p = progname + 1; /* Copy the name string. */ name = strdup(p); /* If we haven't already done so, register our exit handler. */ if (initialized == 0) { atexit(done); initialized = 1; } } void warn(const char * fmt, ...) { va_list ap; va_start(ap, fmt); fprintf(stderr, "%s", (name != NULL) ? name : "(unknown)"); if (fmt != NULL) { fprintf(stderr, ": "); vfprintf(stderr, fmt, ap); } fprintf(stderr, ": %s\n", strerror(errno)); va_end(ap); } void warnx(const char * fmt, ...) { va_list ap; va_start(ap, fmt); fprintf(stderr, "%s", (name != NULL) ? name : "(unknown)"); if (fmt != NULL) { fprintf(stderr, ": "); vfprintf(stderr, fmt, ap); } fprintf(stderr, "\n"); va_end(ap); } scrypt-1.2.0/libcperciva/util/warnp.h000644 001751 001751 00000002525 12561447061 021244 0ustar00cpercivacperciva000000 000000 #ifndef _WARNP_H_ #define _WARNP_H_ #include /* Avoid namespace collisions with BSD . */ #define warn libcperciva_warn #define warnx libcperciva_warnx /** * warnp_setprogname(progname): * Set the program name to be used by warn() and warnx() to ${progname}. */ void warnp_setprogname(const char *); #define WARNP_INIT do { \ if (argv[0] != NULL) \ warnp_setprogname(argv[0]); \ } while (0) /* As in BSD . */ void warn(const char *, ...); void warnx(const char *, ...); /* * If compiled with DEBUG defined, print __FILE__ and __LINE__. */ #ifdef DEBUG #define warnline do { \ warnx("%s, %d", __FILE__, __LINE__); \ } while (0) #else #define warnline #endif /* * Call warn(3) or warnx(3) depending upon whether errno == 0; and clear * errno (so that the standard error message isn't repeated later). */ #define warnp(...) do { \ warnline; \ if (errno != 0) { \ warn(__VA_ARGS__); \ errno = 0; \ } else \ warnx(__VA_ARGS__); \ } while (0) /* * Call warnx(3) and set errno == 0. Unlike warnp, this should be used * in cases where we're reporting a problem which we discover ourselves * rather than one which is reported to us from a library or the kernel. */ #define warn0(...) do { \ warnline; \ warnx(__VA_ARGS__); \ errno = 0; \ } while (0) #endif /* !_WARNP_H_ */ scrypt-1.2.0/libcperciva/util/entropy.h000644 001751 001751 00000000405 12561447061 021610 0ustar00cpercivacperciva000000 000000 #ifndef _ENTROPY_H_ #define _ENTROPY_H_ #include #include /** * entropy_read(buf, buflen): * Fill the given buffer with random bytes provided by the operating system. */ int entropy_read(uint8_t *, size_t); #endif /* !_ENTROPY_H_ */ scrypt-1.2.0/libcperciva/util/insecure_memzero.c000644 001751 001751 00000000624 12561447061 023461 0ustar00cpercivacperciva000000 000000 #include #include #include "insecure_memzero.h" /* Function which does the zeroing. */ static void insecure_memzero_func(volatile void * buf, size_t len) { volatile uint8_t * _buf = buf; size_t i; for (i = 0; i < len; i++) _buf[i] = 0; } /* Pointer to memory-zeroing function. */ void (* volatile insecure_memzero_ptr)(volatile void *, size_t) = insecure_memzero_func; scrypt-1.2.0/libcperciva/crypto/crypto_entropy.c000644 001751 001751 00000011353 12561447061 023552 0ustar00cpercivacperciva000000 000000 #include #include #include #include "entropy.h" #include "insecure_memzero.h" #include "sha256.h" #include "crypto_entropy.h" /** * This system implements the HMAC_DRBG pseudo-random number generator as * specified in section 10.1.2 of the NIST SP 800-90 standard. In this * implementation, the optional personalization_string and additional_input * specified in the standard are not implemented. */ /* Internal HMAC_DRBG state. */ static struct { uint8_t Key[32]; uint8_t V[32]; uint32_t reseed_counter; } drbg; /* Set to non-zero once the PRNG has been instantiated. */ static int instantiated = 0; /* Could be as high as 2^48 if we wanted... */ #define RESEED_INTERVAL 256 /* Limited to 2^16 by specification. */ #define GENERATE_MAXLEN 65536 static int instantiate(void); static void update(uint8_t *, size_t); static int reseed(void); static void generate(uint8_t *, size_t); /** * instantiate(void): * Initialize the DRBG state. (Section 10.1.2.3) */ static int instantiate(void) { uint8_t seed_material[48]; /* Obtain random seed_material = (entropy_input || nonce). */ if (entropy_read(seed_material, 48)) return (-1); /* Initialize Key, V, and reseed_counter. */ memset(drbg.Key, 0x00, 32); memset(drbg.V, 0x01, 32); drbg.reseed_counter = 1; /* Mix the random seed into the state. */ update(seed_material, 48); /* Clean the stack. */ insecure_memzero(seed_material, 48); /* Success! */ return (0); } /** * update(data, datalen): * Update the DRBG state using the provided data. (Section 10.1.2.2) */ static void update(uint8_t * data, size_t datalen) { HMAC_SHA256_CTX ctx; uint8_t K[32]; uint8_t Vx[33]; /* Load (Key, V) into (K, Vx). */ memcpy(K, drbg.Key, 32); memcpy(Vx, drbg.V, 32); /* K <- HMAC(K, V || 0x00 || data). */ Vx[32] = 0x00; HMAC_SHA256_Init(&ctx, K, 32); HMAC_SHA256_Update(&ctx, Vx, 33); HMAC_SHA256_Update(&ctx, data, datalen); HMAC_SHA256_Final(K, &ctx); /* V <- HMAC(K, V). */ HMAC_SHA256_Buf(K, 32, Vx, 32, Vx); /* If the provided data is non-Null, perform another mixing stage. */ if (datalen != 0) { /* K <- HMAC(K, V || 0x01 || data). */ Vx[32] = 0x01; HMAC_SHA256_Init(&ctx, K, 32); HMAC_SHA256_Update(&ctx, Vx, 33); HMAC_SHA256_Update(&ctx, data, datalen); HMAC_SHA256_Final(K, &ctx); /* V <- HMAC(K, V). */ HMAC_SHA256_Buf(K, 32, Vx, 32, Vx); } /* Copy (K, Vx) back to (Key, V). */ memcpy(drbg.Key, K, 32); memcpy(drbg.V, Vx, 32); /* Clean the stack. */ insecure_memzero(K, 32); insecure_memzero(Vx, 33); } /** * reseed(void): * Reseed the DRBG state (mix in new entropy). (Section 10.1.2.4) */ static int reseed(void) { uint8_t seed_material[32]; /* Obtain random seed_material = entropy_input. */ if (entropy_read(seed_material, 32)) return (-1); /* Mix the random seed into the state. */ update(seed_material, 32); /* Reset the reseed_counter. */ drbg.reseed_counter = 1; /* Clean the stack. */ insecure_memzero(seed_material, 32); /* Success! */ return (0); } /** * generate(buf, buflen): * Fill the provided buffer with random bits, assuming that reseed_counter * is less than RESEED_INTERVAL (the caller is responsible for calling * reseed() as needed) and ${buflen} is less than 2^16 (the caller is * responsible for splitting up larger requests). (Section 10.1.2.5) */ static void generate(uint8_t * buf, size_t buflen) { size_t bufpos; assert(buflen <= GENERATE_MAXLEN); assert(drbg.reseed_counter <= RESEED_INTERVAL); /* Iterate until we've filled the buffer. */ for (bufpos = 0; bufpos < buflen; bufpos += 32) { HMAC_SHA256_Buf(drbg.Key, 32, drbg.V, 32, drbg.V); if (buflen - bufpos >= 32) memcpy(&buf[bufpos], drbg.V, 32); else memcpy(&buf[bufpos], drbg.V, buflen - bufpos); } /* Mix up state. */ update(NULL, 0); /* We're one data-generation step closer to needing a reseed. */ drbg.reseed_counter += 1; } /** * crypto_entropy_read(buf, buflen): * Fill the buffer with unpredictable bits. */ int crypto_entropy_read(uint8_t * buf, size_t buflen) { size_t bytes_to_provide; /* Instantiate if needed. */ if (instantiated == 0) { /* Try to instantiate the PRNG. */ if (instantiate()) return (-1); /* We have instantiated the PRNG. */ instantiated = 1; } /* Loop until we've filled the buffer. */ while (buflen > 0) { /* Do we need to reseed? */ if (drbg.reseed_counter > RESEED_INTERVAL) { if (reseed()) return (-1); } /* How much data are we generating in this step? */ if (buflen > GENERATE_MAXLEN) bytes_to_provide = GENERATE_MAXLEN; else bytes_to_provide = buflen; /* Generate bytes. */ generate(buf, bytes_to_provide); /* We've done part of the buffer. */ buf += bytes_to_provide; buflen -= bytes_to_provide; } /* Success! */ return (0); } scrypt-1.2.0/libcperciva/crypto/crypto_aes.h000644 001751 001751 00000001445 12561447061 022630 0ustar00cpercivacperciva000000 000000 #ifndef _CRYPTO_AES_H_ #define _CRYPTO_AES_H_ #include #include /* Opaque structure. */ struct crypto_aes_key; /** * crypto_aes_key_expand(key, len): * Expand the ${len}-byte AES key ${key} into a structure which can be passed * to crypto_aes_encrypt_block. The length must be 16 or 32. */ struct crypto_aes_key * crypto_aes_key_expand(const uint8_t *, size_t); /** * crypto_aes_encrypt_block(in, out, key): * Using the expanded AES key ${key}, encrypt the block ${in} and write the * resulting ciphertext to ${out}. */ void crypto_aes_encrypt_block(const uint8_t *, uint8_t *, const struct crypto_aes_key *); /** * crypto_aes_key_free(key): * Free the expanded AES key ${key}. */ void crypto_aes_key_free(struct crypto_aes_key *); #endif /* !_CRYPTO_AES_H_ */ scrypt-1.2.0/libcperciva/crypto/crypto_aes_aesni.c000644 001751 001751 00000017252 12561447061 024005 0ustar00cpercivacperciva000000 000000 #include "cpusupport.h" #ifdef CPUSUPPORT_X86_AESNI #include #include #include #include #include "insecure_memzero.h" #include "warnp.h" #include "crypto_aes_aesni.h" /* Expanded-key structure. */ struct crypto_aes_key_aesni { uint8_t rkeys_buf[15 * sizeof(__m128i) + (sizeof(__m128i) - 1)]; __m128i * rkeys; size_t nr; }; /* Compute an AES-128 round key. */ #define MKRKEY128(rkeys, i, rcon) do { \ __m128i _s = rkeys[i - 1]; \ __m128i _t = rkeys[i - 1]; \ _s = _mm_xor_si128(_s, _mm_slli_si128(_s, 4)); \ _s = _mm_xor_si128(_s, _mm_slli_si128(_s, 8)); \ _t = _mm_aeskeygenassist_si128(_t, rcon); \ _t = _mm_shuffle_epi32(_t, 0xff); \ rkeys[i] = _mm_xor_si128(_s, _t); \ } while (0) /** * crypto_aes_key_expand_128_aesni(key, rkeys): * Expand the 128-bit AES key ${key} into the 11 round keys ${rkeys}. This * implementation uses x86 AESNI instructions, and should only be used if * CPUSUPPORT_X86_AESNI is defined and cpusupport_x86_aesni() returns nonzero. */ static void crypto_aes_key_expand_128_aesni(const uint8_t key[16], __m128i rkeys[11]) { /* The first round key is just the key. */ /** * XXX Compiler breakage: * The intrinsic defined by Intel for _mm_loadu_si128 defines it as * taking a (const __m128i *) parameter. This forces us to write a * bug: The cast to (const __m128i *) is invalid since it increases * the alignment requirement of the pointer. Alas, until compilers * get fixed intrinsics, all we can do is code the bug and require * that alignment-requirement-increasing compiler warnings get * disabled. */ rkeys[0] = _mm_loadu_si128((const __m128i *)&key[0]); /* * Each of the remaining round keys are computed from the preceding * round key: rotword+subword+rcon (provided as aeskeygenassist) to * compute the 'temp' value, then xor with 1, 2, 3, or all 4 of the * 32-bit words from the preceding round key. Unfortunately, 'rcon' * is encoded as an immediate value, so we need to write the loop out * ourselves rather than allowing the compiler to expand it. */ MKRKEY128(rkeys, 1, 0x01); MKRKEY128(rkeys, 2, 0x02); MKRKEY128(rkeys, 3, 0x04); MKRKEY128(rkeys, 4, 0x08); MKRKEY128(rkeys, 5, 0x10); MKRKEY128(rkeys, 6, 0x20); MKRKEY128(rkeys, 7, 0x40); MKRKEY128(rkeys, 8, 0x80); MKRKEY128(rkeys, 9, 0x1b); MKRKEY128(rkeys, 10, 0x36); } /* Compute an AES-256 round key. */ #define MKRKEY256(rkeys, i, shuffle, rcon) do { \ __m128i _s = rkeys[i - 2]; \ __m128i _t = rkeys[i - 1]; \ _s = _mm_xor_si128(_s, _mm_slli_si128(_s, 4)); \ _s = _mm_xor_si128(_s, _mm_slli_si128(_s, 8)); \ _t = _mm_aeskeygenassist_si128(_t, rcon); \ _t = _mm_shuffle_epi32(_t, shuffle); \ rkeys[i] = _mm_xor_si128(_s, _t); \ } while (0) /** * crypto_aes_key_expand_256_aesni(key, rkeys): * Expand the 256-bit AES key ${key} into the 15 round keys ${rkeys}. This * implementation uses x86 AESNI instructions, and should only be used if * CPUSUPPORT_X86_AESNI is defined and cpusupport_x86_aesni() returns nonzero. */ static void crypto_aes_key_expand_256_aesni(const uint8_t key[32], __m128i rkeys[15]) { /* The first two round keys are just the key. */ /** * XXX Compiler breakage: * The intrinsic defined by Intel for _mm_loadu_si128 defines it as * taking a (const __m128i *) parameter. This forces us to write a * bug: The cast to (const __m128i *) is invalid since it increases * the alignment requirement of the pointer. Alas, until compilers * get fixed intrinsics, all we can do is code the bug and require * that alignment-requirement-increasing compiler warnings get * disabled. */ rkeys[0] = _mm_loadu_si128((const __m128i *)&key[0]); rkeys[1] = _mm_loadu_si128((const __m128i *)&key[16]); /* * Each of the remaining round keys are computed from the preceding * pair of keys. Even rounds use rotword+subword+rcon, while odd * rounds just use subword; the aeskeygenassist instruction computes * both, and we use 0xff or 0xaa to select the one we need. The rcon * value used is irrelevant for odd rounds since we ignore the value * which it feeds into. Unfortunately, the 'shuffle' and 'rcon' * values are encoded into the instructions as immediates, so we need * to write the loop out ourselves rather than allowing the compiler * to expand it. */ MKRKEY256(rkeys, 2, 0xff, 0x01); MKRKEY256(rkeys, 3, 0xaa, 0x00); MKRKEY256(rkeys, 4, 0xff, 0x02); MKRKEY256(rkeys, 5, 0xaa, 0x00); MKRKEY256(rkeys, 6, 0xff, 0x04); MKRKEY256(rkeys, 7, 0xaa, 0x00); MKRKEY256(rkeys, 8, 0xff, 0x08); MKRKEY256(rkeys, 9, 0xaa, 0x00); MKRKEY256(rkeys, 10, 0xff, 0x10); MKRKEY256(rkeys, 11, 0xaa, 0x00); MKRKEY256(rkeys, 12, 0xff, 0x20); MKRKEY256(rkeys, 13, 0xaa, 0x00); MKRKEY256(rkeys, 14, 0xff, 0x40); } /** * crypto_aes_key_expand_aesni(key, len): * Expand the ${len}-byte AES key ${key} into a structure which can be passed * to crypto_aes_encrypt_block_aesni. The length must be 16 or 32. This * implementation uses x86 AESNI instructions, and should only be used if * CPUSUPPORT_X86_AESNI is defined and cpusupport_x86_aesni() returns nonzero. */ void * crypto_aes_key_expand_aesni(const uint8_t * key, size_t len) { struct crypto_aes_key_aesni * kexp; size_t rkey_offset; /* Allocate structure. */ if ((kexp = malloc(sizeof(struct crypto_aes_key_aesni))) == NULL) goto err0; /* Figure out where to put the round keys. */ rkey_offset = (uintptr_t)(&kexp->rkeys_buf[0]) % sizeof(__m128i); rkey_offset = (sizeof(__m128i) - rkey_offset) % sizeof(__m128i); kexp->rkeys = (void *)&kexp->rkeys_buf[rkey_offset]; /* Compute round keys. */ if (len == 16) { kexp->nr = 10; crypto_aes_key_expand_128_aesni(key, kexp->rkeys); } else if (len == 32) { kexp->nr = 14; crypto_aes_key_expand_256_aesni(key, kexp->rkeys); } else { warn0("Unsupported AES key length: %zu bytes", len); goto err1; } /* Success! */ return (kexp); err1: free(kexp); err0: /* Failure! */ return (NULL); } /** * crypto_aes_encrypt_block_aesni(in, out, key): * Using the expanded AES key ${key}, encrypt the block ${in} and write the * resulting ciphertext to ${out}. This implementation uses x86 AESNI * instructions, and should only be used if CPUSUPPORT_X86_AESNI is defined * and cpusupport_x86_aesni() returns nonzero. */ void crypto_aes_encrypt_block_aesni(const uint8_t * in, uint8_t * out, const void * key) { const struct crypto_aes_key_aesni * _key = key; const __m128i * aes_key = _key->rkeys; __m128i aes_state; size_t nr = _key->nr; aes_state = _mm_loadu_si128((const __m128i *)in); aes_state = _mm_xor_si128(aes_state, aes_key[0]); aes_state = _mm_aesenc_si128(aes_state, aes_key[1]); aes_state = _mm_aesenc_si128(aes_state, aes_key[2]); aes_state = _mm_aesenc_si128(aes_state, aes_key[3]); aes_state = _mm_aesenc_si128(aes_state, aes_key[4]); aes_state = _mm_aesenc_si128(aes_state, aes_key[5]); aes_state = _mm_aesenc_si128(aes_state, aes_key[6]); aes_state = _mm_aesenc_si128(aes_state, aes_key[7]); aes_state = _mm_aesenc_si128(aes_state, aes_key[8]); aes_state = _mm_aesenc_si128(aes_state, aes_key[9]); if (nr > 10) { aes_state = _mm_aesenc_si128(aes_state, aes_key[10]); aes_state = _mm_aesenc_si128(aes_state, aes_key[11]); if (nr > 12) { aes_state = _mm_aesenc_si128(aes_state, aes_key[12]); aes_state = _mm_aesenc_si128(aes_state, aes_key[13]); } } aes_state = _mm_aesenclast_si128(aes_state, aes_key[nr]); _mm_storeu_si128((__m128i *)out, aes_state); } /** * crypto_aes_key_free_aesni(key): * Free the expanded AES key ${key}. */ void crypto_aes_key_free_aesni(void * key) { /* Attempt to zero the expanded key. */ insecure_memzero(key, sizeof(struct crypto_aes_key_aesni)); /* Free the key. */ free(key); } #endif /* CPUSUPPORT_X86_AESNI */ scrypt-1.2.0/libcperciva/crypto/crypto_aes_aesni.h000644 001751 001751 00000002070 12561447061 024002 0ustar00cpercivacperciva000000 000000 #ifndef _CRYPTO_AES_AESNI_H_ #define _CRYPTO_AES_AESNI_H_ #include #include /** * crypto_aes_key_expand_aesni(key, len): * Expand the ${len}-byte AES key ${key} into a structure which can be passed * to crypto_aes_encrypt_block_aesni. The length must be 16 or 32. This * implementation uses x86 AESNI instructions, and should only be used if * CPUSUPPORT_X86_AESNI is defined and cpusupport_x86_aesni() returns nonzero. */ void * crypto_aes_key_expand_aesni(const uint8_t *, size_t); /** * crypto_aes_encrypt_block_aesni(in, out, key): * Using the expanded AES key ${key}, encrypt the block ${in} and write the * resulting ciphertext to ${out}. This implementation uses x86 AESNI * instructions, and should only be used if CPUSUPPORT_X86_AESNI is defined * and cpusupport_x86_aesni() returns nonzero. */ void crypto_aes_encrypt_block_aesni(const uint8_t *, uint8_t *, const void *); /** * crypto_aes_key_free_aesni(key): * Free the expanded AES key ${key}. */ void crypto_aes_key_free_aesni(void *); #endif /* !_CRYPTO_AES_AESNI_H_ */ scrypt-1.2.0/libcperciva/crypto/crypto_aesctr.c000644 001751 001751 00000005435 12561447061 023337 0ustar00cpercivacperciva000000 000000 #include #include #include "crypto_aes.h" #include "sysendian.h" #include "crypto_aesctr.h" struct crypto_aesctr { const struct crypto_aes_key * key; uint64_t nonce; uint64_t bytectr; uint8_t buf[16]; }; /** * crypto_aesctr_init(key, nonce): * Prepare to encrypt/decrypt data with AES in CTR mode, using the provided * expanded key and nonce. The key provided must remain valid for the * lifetime of the stream. */ struct crypto_aesctr * crypto_aesctr_init(const struct crypto_aes_key * key, uint64_t nonce) { struct crypto_aesctr * stream; /* Allocate memory. */ if ((stream = malloc(sizeof(struct crypto_aesctr))) == NULL) goto err0; /* Initialize values. */ stream->key = key; stream->nonce = nonce; stream->bytectr = 0; /* Success! */ return (stream); err0: /* Failure! */ return (NULL); } /** * crypto_aesctr_stream(stream, inbuf, outbuf, buflen): * Generate the next ${buflen} bytes of the AES-CTR stream and xor them with * bytes from ${inbuf}, writing the result into ${outbuf}. If the buffers * ${inbuf} and ${outbuf} overlap, they must be identical. */ void crypto_aesctr_stream(struct crypto_aesctr * stream, const uint8_t * inbuf, uint8_t * outbuf, size_t buflen) { uint8_t pblk[16]; size_t pos; int bytemod; for (pos = 0; pos < buflen; pos++) { /* How far through the buffer are we? */ bytemod = stream->bytectr % 16; /* Generate a block of cipherstream if needed. */ if (bytemod == 0) { be64enc(pblk, stream->nonce); be64enc(pblk + 8, stream->bytectr / 16); crypto_aes_encrypt_block(pblk, stream->buf, stream->key); } /* Encrypt a byte. */ outbuf[pos] = inbuf[pos] ^ stream->buf[bytemod]; /* Move to the next byte of cipherstream. */ stream->bytectr += 1; } } /** * crypto_aesctr_free(stream): * Free the provided stream object. */ void crypto_aesctr_free(struct crypto_aesctr * stream) { int i; /* Be compatible with free(NULL). */ if (stream == NULL) return; /* Zero potentially sensitive information. */ for (i = 0; i < 16; i++) stream->buf[i] = 0; stream->bytectr = stream->nonce = 0; /* Free the stream. */ free(stream); } /** * crypto_aesctr_buf(key, nonce, inbuf, outbuf, buflen): * Equivalent to init(key, nonce); stream(inbuf, outbuf, buflen); free. */ void crypto_aesctr_buf(const struct crypto_aes_key * key, uint64_t nonce, const uint8_t * inbuf, uint8_t * outbuf, size_t buflen) { struct crypto_aesctr stream_rec; struct crypto_aesctr * stream = &stream_rec; int i; /* Initialize values. */ stream->key = key; stream->nonce = nonce; stream->bytectr = 0; /* Perform the encryption. */ crypto_aesctr_stream(stream, inbuf, outbuf, buflen); /* Zero potentially sensitive information. */ for (i = 0; i < 16; i++) stream->buf[i] = 0; stream->bytectr = stream->nonce = 0; } scrypt-1.2.0/libcperciva/crypto/crypto_aesctr.h000644 001751 001751 00000002272 12561447061 023340 0ustar00cpercivacperciva000000 000000 #ifndef _CRYPTO_AESCTR_H_ #define _CRYPTO_AESCTR_H_ #include #include /* Opaque type. */ struct crypto_aes_key; /** * crypto_aesctr_init(key, nonce): * Prepare to encrypt/decrypt data with AES in CTR mode, using the provided * expanded key and nonce. The key provided must remain valid for the * lifetime of the stream. */ struct crypto_aesctr * crypto_aesctr_init(const struct crypto_aes_key *, uint64_t); /** * crypto_aesctr_stream(stream, inbuf, outbuf, buflen): * Generate the next ${buflen} bytes of the AES-CTR stream and xor them with * bytes from ${inbuf}, writing the result into ${outbuf}. If the buffers * ${inbuf} and ${outbuf} overlap, they must be identical. */ void crypto_aesctr_stream(struct crypto_aesctr *, const uint8_t *, uint8_t *, size_t); /** * crypto_aesctr_free(stream): * Free the provided stream object. */ void crypto_aesctr_free(struct crypto_aesctr *); /** * crypto_aesctr_buf(key, nonce, inbuf, outbuf, buflen): * Equivalent to init(key, nonce); stream(inbuf, outbuf, buflen); free. */ void crypto_aesctr_buf(const struct crypto_aes_key *, uint64_t, const uint8_t *, uint8_t *, size_t); #endif /* !_CRYPTO_AESCTR_H_ */ scrypt-1.2.0/libcperciva/crypto/crypto_entropy.h000644 001751 001751 00000000467 12561447061 023563 0ustar00cpercivacperciva000000 000000 #ifndef _CRYPTO_ENTROPY_H_ #define _CRYPTO_ENTROPY_H_ #include #include /** * crypto_entropy_read(buf, buflen): * Fill the buffer with unpredictable bits. The value ${buflen} must be * less than 2^16. */ int crypto_entropy_read(uint8_t *, size_t); #endif /* !_CRYPTO_ENTROPY_H_ */ scrypt-1.2.0/libcperciva/crypto/crypto_aes.c000644 001751 001751 00000007157 12561447061 022631 0ustar00cpercivacperciva000000 000000 #include #include #include #include #include #include "cpusupport.h" #include "crypto_aes_aesni.h" #include "insecure_memzero.h" #include "warnp.h" #include "crypto_aes.h" /** * This represents either an AES_KEY or a struct crypto_aes_key_aesni; we * know which it is based on whether we're using AESNI code or not. As such, * it's just an opaque pointer; but declaring it as a named structure type * prevents type-mismatch bugs in upstream code. */ struct crypto_aes_key; #ifdef CPUSUPPORT_X86_AESNI /* Test whether OpenSSL and AESNI code produce the same AES ciphertext. */ static int aesnitest(uint8_t ptext[16], uint8_t * key, size_t keylen) { AES_KEY kexp_openssl; void * kexp_aesni; uint8_t ctext_openssl[16]; uint8_t ctext_aesni[16]; /* Expand the key. */ AES_set_encrypt_key(key, keylen * 8, &kexp_openssl); if ((kexp_aesni = crypto_aes_key_expand_aesni(key, keylen)) == NULL) goto err0; /* Encrypt the block. */ AES_encrypt(ptext, ctext_openssl, &kexp_openssl); crypto_aes_encrypt_block_aesni(ptext, ctext_aesni, kexp_aesni); /* Free the AESNI expanded key. */ crypto_aes_key_free_aesni(kexp_aesni); /* Do the outputs match? */ return (memcmp(ctext_openssl, ctext_aesni, 16)); err0: /* Failure! */ return (-1); } /* Should we use AESNI? */ static int useaesni(void) { static int aesnigood = -1; uint8_t key[32]; uint8_t ptext[16]; size_t i; /* If we haven't decided which code to use yet, decide now. */ while (aesnigood == -1) { /* Default to OpenSSL. */ aesnigood = 0; /* If the CPU doesn't claim to support AESNI, stop here. */ if (!cpusupport_x86_aesni()) break; /* Test cases: key is 0x00010203..., ptext is 0x00112233... */ for (i = 0; i < 16; i++) ptext[i] = 0x11 * i; for (i = 0; i < 32; i++) key[i] = i; /* Test that AESNI and OpenSSL produce the same results. */ if (aesnitest(ptext, key, 16) || aesnitest(ptext, key, 32)) { warn0("Disabling AESNI due to failed self-test"); break; } /* AESNI works; use it. */ aesnigood = 1; } return (aesnigood); } #endif /* CPUSUPPORT_X86_AESNI */ /** * crypto_aes_key_expand(key, len): * Expand the ${len}-byte AES key ${key} into a structure which can be passed * to crypto_aes_encrypt_block. The length must be 16 or 32. */ struct crypto_aes_key * crypto_aes_key_expand(const uint8_t * key, size_t len) { AES_KEY * kexp; /* Sanity-check. */ assert((len == 16) || (len == 32)); #ifdef CPUSUPPORT_X86_AESNI /* Use AESNI if we can. */ if (useaesni()) return (crypto_aes_key_expand_aesni(key, len)); #endif /* Allocate structure. */ if ((kexp = malloc(sizeof(AES_KEY))) == NULL) goto err0; /* Expand the key. */ AES_set_encrypt_key(key, len * 8, kexp); /* Success! */ return ((void *)kexp); err0: /* Failure! */ return (NULL); } /** * crypto_aes_encrypt_block(in, out, key): * Using the expanded AES key ${key}, encrypt the block ${in} and write the * resulting ciphertext to ${out}. */ void crypto_aes_encrypt_block(const uint8_t * in, uint8_t * out, const struct crypto_aes_key * key) { #ifdef CPUSUPPORT_X86_AESNI if (useaesni()) { crypto_aes_encrypt_block_aesni(in, out, (const void *)key); return; } #endif /* Get AES to do the work. */ AES_encrypt(in, out, (const void *)key); } /** * crypto_aes_key_free(key): * Free the expanded AES key ${key}. */ void crypto_aes_key_free(struct crypto_aes_key * key) { #ifdef CPUSUPPORT_X86_AESNI if (useaesni()) { crypto_aes_key_free_aesni((void *)key); return; } #endif /* Attempt to zero the expanded key. */ insecure_memzero(key, sizeof(AES_KEY)); /* Free the key. */ free(key); } scrypt-1.2.0/libcperciva/cpusupport/Build/000755 001751 001751 00000000000 12561447061 022246 5ustar00cpercivacperciva000000 000000 scrypt-1.2.0/libcperciva/cpusupport/cpusupport.h000644 001751 001751 00000004774 12561447061 023620 0ustar00cpercivacperciva000000 000000 #ifndef _CPUSUPPORT_H_ #define _CPUSUPPORT_H_ /* * To enable support for non-portable CPU features at compile time, one or * more CPUSUPPORT_ARCH_FEATURE macros should be defined. This can be done * directly on the compiler command line; or a file can be created with the * necessary #define lines and then -D CPUSUPPORT_CONFIG_FILE=cpuconfig.h * (or similar) can be provided to include that file here. */ #ifdef CPUSUPPORT_CONFIG_FILE #include CPUSUPPORT_CONFIG_FILE #endif /* * The CPUSUPPORT_FEATURE macro declares the necessary variables and * functions for detecting CPU feature support at run time. The function * defined in the macro acts to cache the result of the ..._detect function * using the ..._present and ..._init variables. */ #define CPUSUPPORT_FEATURE(arch, feature) \ extern int cpusupport_ ## arch ## _ ## feature ## _present; \ extern int cpusupport_ ## arch ## _ ## feature ## _init; \ int cpusupport_ ## arch ## _ ## feature ## _detect(void); \ \ static inline int \ cpusupport_ ## arch ## _ ## feature(void) \ { \ \ if (cpusupport_ ## arch ## _ ## feature ## _present) \ return (1); \ else if (cpusupport_ ## arch ## _ ## feature ## _init) \ return (0); \ cpusupport_ ## arch ## _ ## feature ## _present = \ cpusupport_ ## arch ##_ ## feature ## _detect(); \ cpusupport_ ## arch ## _ ## feature ## _init = 1; \ return (cpusupport_ ## arch ## _ ## feature ## _present); \ } \ struct cpusupport_ ## arch ## _ ## feature ## _dummy /* * CPUSUPPORT_FEATURE_DECL(arch, feature): * Macro which defines variables and provides a function declaration for * detecting the presence of "feature" on the "arch" architecture. The * function body following this macro expansion must return nonzero if the * feature is present, or zero if the feature is not present or the detection * fails for any reason. */ #define CPUSUPPORT_FEATURE_DECL(arch, feature) \ int cpusupport_ ## arch ## _ ## feature ## _present = 0; \ int cpusupport_ ## arch ## _ ## feature ## _init = 0; \ int \ cpusupport_ ## arch ## _ ## feature ## _detect(void) /* * Any features listed here must have associated C files compiled and linked * in, since the macro references symbols which must be defined. Projects * which do not need to detect certain CPU features may wish to remove lines * from this list so that the associated C files can be omitted. */ CPUSUPPORT_FEATURE(x86, aesni); CPUSUPPORT_FEATURE(x86, sse2); #endif /* !_CPUSUPPORT_H_ */ scrypt-1.2.0/libcperciva/cpusupport/cpusupport_x86_aesni.c000644 001751 001751 00000001076 12561447061 025467 0ustar00cpercivacperciva000000 000000 #include "cpusupport.h" #ifdef CPUSUPPORT_X86_CPUID #include #endif #define CPUID_AESNI_BIT (1 << 25) CPUSUPPORT_FEATURE_DECL(x86, aesni) { #ifdef CPUSUPPORT_X86_CPUID unsigned int eax, ebx, ecx, edx; /* Check if CPUID supports the level we need. */ if (!__get_cpuid(0, &eax, &ebx, &ecx, &edx)) goto unsupported; if (eax < 1) goto unsupported; /* Ask about CPU features. */ if (!__get_cpuid(1, &eax, &ebx, &ecx, &edx)) goto unsupported; /* Return the relevant feature bit. */ return (ecx & CPUID_AESNI_BIT); unsupported: #endif return (0); } scrypt-1.2.0/libcperciva/cpusupport/cpusupport_x86_sse2.c000644 001751 001751 00000001073 12561447061 025241 0ustar00cpercivacperciva000000 000000 #include "cpusupport.h" #ifdef CPUSUPPORT_X86_CPUID #include #endif #define CPUID_SSE2_BIT (1 << 26) CPUSUPPORT_FEATURE_DECL(x86, sse2) { #ifdef CPUSUPPORT_X86_CPUID unsigned int eax, ebx, ecx, edx; /* Check if CPUID supports the level we need. */ if (!__get_cpuid(0, &eax, &ebx, &ecx, &edx)) goto unsupported; if (eax < 1) goto unsupported; /* Ask about CPU features. */ if (!__get_cpuid(1, &eax, &ebx, &ecx, &edx)) goto unsupported; /* Return the relevant feature bit. */ return (edx & CPUID_SSE2_BIT); unsupported: #endif return (0); } scrypt-1.2.0/libcperciva/cpusupport/Build/cpusupport-X86-AESNI.c000644 001751 001751 00000000304 12561447061 026053 0ustar00cpercivacperciva000000 000000 #include static char a[16]; int main(void) { __m128i x, y; x = _mm_loadu_si128((__m128i *)a); y = _mm_aesenc_si128(x, x); _mm_storeu_si128((__m128i *)a, y); return (a[0]); } scrypt-1.2.0/libcperciva/cpusupport/Build/cpusupport-X86-CPUID.c000644 001751 001751 00000000152 12561447061 026061 0ustar00cpercivacperciva000000 000000 #include int main(void) { unsigned int a, b, c, d; return __get_cpuid(0, &a, &b, &c, &d); } scrypt-1.2.0/libcperciva/cpusupport/Build/cpusupport.sh000755 001751 001751 00000002200 12561447061 025023 0ustar00cpercivacperciva000000 000000 # Should be sourced by `command -p sh path/to/cpusupport.sh` from # within a Makefile. # Standard output should be written to cpusupport-config.h, which is both a # C header file defining CPUSUPPORT_ARCH_FEATURE macros and sourceable sh # code which sets CFLAGS_ARCH_FEATURE environment variables. SRCDIR=`command -p dirname "$0"` feature() { ARCH=$1 FEATURE=$2 shift 2; printf "Checking if compiler supports $ARCH $FEATURE feature..." 1>&2 for CFLAG in "$@"; do if ${CC} ${CFLAGS} -D_POSIX_C_SOURCE=200809L ${CFLAG} \ ${SRCDIR}/cpusupport-$ARCH-$FEATURE.c 2>/dev/null; then rm -f a.out break; fi CFLAG=NOTSUPPORTED; done case $CFLAG in NOTSUPPORTED) echo " no" 1>&2 ;; "") echo " yes" 1>&2 echo "#define CPUSUPPORT_${ARCH}_${FEATURE}" ;; *) echo " yes, via $CFLAG" 1>&2 echo "#define CPUSUPPORT_${ARCH}_${FEATURE}" echo "#ifdef cpusupport_dummy" echo "export CFLAGS_${ARCH}_${FEATURE}=\"${CFLAG}\"" echo "#endif" ;; esac } feature X86 CPUID "" feature X86 SSE2 "" "-msse2" "-msse2 -Wno-cast-align" feature X86 AESNI "" "-maes" "-maes -Wno-cast-align" "-maes -Wno-missing-prototypes -Wno-cast-qual" scrypt-1.2.0/libcperciva/cpusupport/Build/cpusupport-X86-SSE2.c000644 001751 001751 00000000244 12561447061 025733 0ustar00cpercivacperciva000000 000000 #include static char a[16]; int main(void) { __m128i x; x = _mm_loadu_si128((__m128i *)a); _mm_storeu_si128((__m128i *)a, x); return (a[0]); } scrypt-1.2.0/libcperciva/alg/sha256.c000644 001751 001751 00000025261 12561447061 020710 0ustar00cpercivacperciva000000 000000 #include #include #include #include "insecure_memzero.h" #include "sysendian.h" #include "sha256.h" /* * Encode a length len/4 vector of (uint32_t) into a length len vector of * (uint8_t) in big-endian form. Assumes len is a multiple of 4. */ static void be32enc_vect(uint8_t * dst, const uint32_t * src, size_t len) { size_t i; /* Sanity-check. */ assert(len % 4 == 0); /* Encode vector, one word at a time. */ for (i = 0; i < len / 4; i++) be32enc(dst + i * 4, src[i]); } /* * Decode a big-endian length len vector of (uint8_t) into a length * len/4 vector of (uint32_t). Assumes len is a multiple of 4. */ static void be32dec_vect(uint32_t * dst, const uint8_t * src, size_t len) { size_t i; /* Sanity-check. */ assert(len % 4 == 0); /* Decode vector, one word at a time. */ for (i = 0; i < len / 4; i++) dst[i] = be32dec(src + i * 4); } /* Elementary functions used by SHA256 */ #define Ch(x, y, z) ((x & (y ^ z)) ^ z) #define Maj(x, y, z) ((x & (y | z)) | (y & z)) #define SHR(x, n) (x >> n) #define ROTR(x, n) ((x >> n) | (x << (32 - n))) #define S0(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22)) #define S1(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25)) #define s0(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHR(x, 3)) #define s1(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHR(x, 10)) /* SHA256 round function */ #define RND(a, b, c, d, e, f, g, h, k) \ t0 = h + S1(e) + Ch(e, f, g) + k; \ t1 = S0(a) + Maj(a, b, c); \ d += t0; \ h = t0 + t1; /* Adjusted round function for rotating state */ #define RNDr(S, W, i, k) \ RND(S[(64 - i) % 8], S[(65 - i) % 8], \ S[(66 - i) % 8], S[(67 - i) % 8], \ S[(68 - i) % 8], S[(69 - i) % 8], \ S[(70 - i) % 8], S[(71 - i) % 8], \ W[i] + k) /* * SHA256 block compression function. The 256-bit state is transformed via * the 512-bit input block to produce a new state. */ static void SHA256_Transform(uint32_t * state, const uint8_t block[64]) { uint32_t W[64]; uint32_t S[8]; uint32_t t0, t1; int i; /* 1. Prepare message schedule W. */ be32dec_vect(W, block, 64); for (i = 16; i < 64; i++) W[i] = s1(W[i - 2]) + W[i - 7] + s0(W[i - 15]) + W[i - 16]; /* 2. Initialize working variables. */ memcpy(S, state, 32); /* 3. Mix. */ RNDr(S, W, 0, 0x428a2f98); RNDr(S, W, 1, 0x71374491); RNDr(S, W, 2, 0xb5c0fbcf); RNDr(S, W, 3, 0xe9b5dba5); RNDr(S, W, 4, 0x3956c25b); RNDr(S, W, 5, 0x59f111f1); RNDr(S, W, 6, 0x923f82a4); RNDr(S, W, 7, 0xab1c5ed5); RNDr(S, W, 8, 0xd807aa98); RNDr(S, W, 9, 0x12835b01); RNDr(S, W, 10, 0x243185be); RNDr(S, W, 11, 0x550c7dc3); RNDr(S, W, 12, 0x72be5d74); RNDr(S, W, 13, 0x80deb1fe); RNDr(S, W, 14, 0x9bdc06a7); RNDr(S, W, 15, 0xc19bf174); RNDr(S, W, 16, 0xe49b69c1); RNDr(S, W, 17, 0xefbe4786); RNDr(S, W, 18, 0x0fc19dc6); RNDr(S, W, 19, 0x240ca1cc); RNDr(S, W, 20, 0x2de92c6f); RNDr(S, W, 21, 0x4a7484aa); RNDr(S, W, 22, 0x5cb0a9dc); RNDr(S, W, 23, 0x76f988da); RNDr(S, W, 24, 0x983e5152); RNDr(S, W, 25, 0xa831c66d); RNDr(S, W, 26, 0xb00327c8); RNDr(S, W, 27, 0xbf597fc7); RNDr(S, W, 28, 0xc6e00bf3); RNDr(S, W, 29, 0xd5a79147); RNDr(S, W, 30, 0x06ca6351); RNDr(S, W, 31, 0x14292967); RNDr(S, W, 32, 0x27b70a85); RNDr(S, W, 33, 0x2e1b2138); RNDr(S, W, 34, 0x4d2c6dfc); RNDr(S, W, 35, 0x53380d13); RNDr(S, W, 36, 0x650a7354); RNDr(S, W, 37, 0x766a0abb); RNDr(S, W, 38, 0x81c2c92e); RNDr(S, W, 39, 0x92722c85); RNDr(S, W, 40, 0xa2bfe8a1); RNDr(S, W, 41, 0xa81a664b); RNDr(S, W, 42, 0xc24b8b70); RNDr(S, W, 43, 0xc76c51a3); RNDr(S, W, 44, 0xd192e819); RNDr(S, W, 45, 0xd6990624); RNDr(S, W, 46, 0xf40e3585); RNDr(S, W, 47, 0x106aa070); RNDr(S, W, 48, 0x19a4c116); RNDr(S, W, 49, 0x1e376c08); RNDr(S, W, 50, 0x2748774c); RNDr(S, W, 51, 0x34b0bcb5); RNDr(S, W, 52, 0x391c0cb3); RNDr(S, W, 53, 0x4ed8aa4a); RNDr(S, W, 54, 0x5b9cca4f); RNDr(S, W, 55, 0x682e6ff3); RNDr(S, W, 56, 0x748f82ee); RNDr(S, W, 57, 0x78a5636f); RNDr(S, W, 58, 0x84c87814); RNDr(S, W, 59, 0x8cc70208); RNDr(S, W, 60, 0x90befffa); RNDr(S, W, 61, 0xa4506ceb); RNDr(S, W, 62, 0xbef9a3f7); RNDr(S, W, 63, 0xc67178f2); /* 4. Mix local working variables into global state. */ for (i = 0; i < 8; i++) state[i] += S[i]; /* Clean the stack. */ insecure_memzero(W, 256); insecure_memzero(S, 32); insecure_memzero(&t0, sizeof(uint32_t)); insecure_memzero(&t1, sizeof(uint32_t)); } static uint8_t PAD[64] = { 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; /* Add padding and terminating bit-count. */ static void SHA256_Pad(SHA256_CTX * ctx) { uint8_t len[8]; uint32_t r, plen; /* * Convert length to a vector of bytes -- we do this now rather * than later because the length will change after we pad. */ be64enc(len, ctx->count); /* Add 1--64 bytes so that the resulting length is 56 mod 64. */ r = (ctx->count >> 3) & 0x3f; plen = (r < 56) ? (56 - r) : (120 - r); SHA256_Update(ctx, PAD, (size_t)plen); /* Add the terminating bit-count. */ SHA256_Update(ctx, len, 8); } /* Magic initialization constants. */ static const uint32_t initstate[8] = { 0x6A09E667, 0xBB67AE85, 0x3C6EF372, 0xA54FF53A, 0x510E527F, 0x9B05688C, 0x1F83D9AB, 0x5BE0CD19 }; /** * SHA256_Init(ctx): * Initialize the SHA256 context ${ctx}. */ void SHA256_Init(SHA256_CTX * ctx) { /* Zero bits processed so far. */ ctx->count = 0; /* Initialize state. */ memcpy(ctx->state, initstate, sizeof(initstate)); } /** * SHA256_Update(ctx, in, len): * Input ${len} bytes from ${in} into the SHA256 context ${ctx}. */ void SHA256_Update(SHA256_CTX * ctx, const void * in, size_t len) { uint32_t r; const uint8_t * src = in; /* Return immediately if we have nothing to do. */ if (len == 0) return; /* Number of bytes left in the buffer from previous updates. */ r = (ctx->count >> 3) & 0x3f; /* Update number of bits. */ ctx->count += (uint64_t)(len) << 3; /* Handle the case where we don't need to perform any transforms. */ if (len < 64 - r) { memcpy(&ctx->buf[r], src, len); return; } /* Finish the current block. */ memcpy(&ctx->buf[r], src, 64 - r); SHA256_Transform(ctx->state, ctx->buf); src += 64 - r; len -= 64 - r; /* Perform complete blocks. */ while (len >= 64) { SHA256_Transform(ctx->state, src); src += 64; len -= 64; } /* Copy left over data into buffer. */ memcpy(ctx->buf, src, len); } /** * SHA256_Final(digest, ctx): * Output the SHA256 hash of the data input to the context ${ctx} into the * buffer ${digest}. */ void SHA256_Final(uint8_t digest[32], SHA256_CTX * ctx) { /* Add padding. */ SHA256_Pad(ctx); /* Write the hash. */ be32enc_vect(digest, ctx->state, 32); /* Clear the context state. */ insecure_memzero(ctx, sizeof(SHA256_CTX)); } /** * SHA256_Buf(in, len, digest): * Compute the SHA256 hash of ${len} bytes from $in} and write it to ${digest}. */ void SHA256_Buf(const void * in, size_t len, uint8_t digest[32]) { SHA256_CTX ctx; SHA256_Init(&ctx); SHA256_Update(&ctx, in, len); SHA256_Final(digest, &ctx); } /** * HMAC_SHA256_Init(ctx, K, Klen): * Initialize the HMAC-SHA256 context ${ctx} with ${Klen} bytes of key from * ${K}. */ void HMAC_SHA256_Init(HMAC_SHA256_CTX * ctx, const void * _K, size_t Klen) { uint8_t pad[64]; uint8_t khash[32]; const uint8_t * K = _K; size_t i; /* If Klen > 64, the key is really SHA256(K). */ if (Klen > 64) { SHA256_Init(&ctx->ictx); SHA256_Update(&ctx->ictx, K, Klen); SHA256_Final(khash, &ctx->ictx); K = khash; Klen = 32; } /* Inner SHA256 operation is SHA256(K xor [block of 0x36] || data). */ SHA256_Init(&ctx->ictx); memset(pad, 0x36, 64); for (i = 0; i < Klen; i++) pad[i] ^= K[i]; SHA256_Update(&ctx->ictx, pad, 64); /* Outer SHA256 operation is SHA256(K xor [block of 0x5c] || hash). */ SHA256_Init(&ctx->octx); memset(pad, 0x5c, 64); for (i = 0; i < Klen; i++) pad[i] ^= K[i]; SHA256_Update(&ctx->octx, pad, 64); /* Clean the stack. */ insecure_memzero(khash, 32); insecure_memzero(pad, 64); } /** * HMAC_SHA256_Update(ctx, in, len): * Input ${len} bytes from ${in} into the HMAC-SHA256 context ${ctx}. */ void HMAC_SHA256_Update(HMAC_SHA256_CTX * ctx, const void * in, size_t len) { /* Feed data to the inner SHA256 operation. */ SHA256_Update(&ctx->ictx, in, len); } /** * HMAC_SHA256_Final(digest, ctx): * Output the HMAC-SHA256 of the data input to the context ${ctx} into the * buffer ${digest}. */ void HMAC_SHA256_Final(uint8_t digest[32], HMAC_SHA256_CTX * ctx) { uint8_t ihash[32]; /* Finish the inner SHA256 operation. */ SHA256_Final(ihash, &ctx->ictx); /* Feed the inner hash to the outer SHA256 operation. */ SHA256_Update(&ctx->octx, ihash, 32); /* Finish the outer SHA256 operation. */ SHA256_Final(digest, &ctx->octx); /* Clean the stack. */ insecure_memzero(ihash, 32); } /** * HMAC_SHA256_Buf(K, Klen, in, len, digest): * Compute the HMAC-SHA256 of ${len} bytes from ${in} using the key ${K} of * length ${Klen}, and write the result to ${digest}. */ void HMAC_SHA256_Buf(const void * K, size_t Klen, const void * in, size_t len, uint8_t digest[32]) { HMAC_SHA256_CTX ctx; HMAC_SHA256_Init(&ctx, K, Klen); HMAC_SHA256_Update(&ctx, in, len); HMAC_SHA256_Final(digest, &ctx); } /** * PBKDF2_SHA256(passwd, passwdlen, salt, saltlen, c, buf, dkLen): * Compute PBKDF2(passwd, salt, c, dkLen) using HMAC-SHA256 as the PRF, and * write the output to buf. The value dkLen must be at most 32 * (2^32 - 1). */ void PBKDF2_SHA256(const uint8_t * passwd, size_t passwdlen, const uint8_t * salt, size_t saltlen, uint64_t c, uint8_t * buf, size_t dkLen) { HMAC_SHA256_CTX PShctx, hctx; size_t i; uint8_t ivec[4]; uint8_t U[32]; uint8_t T[32]; uint64_t j; int k; size_t clen; /* Sanity-check. */ assert(dkLen <= 32 * (size_t)(UINT32_MAX)); /* Compute HMAC state after processing P and S. */ HMAC_SHA256_Init(&PShctx, passwd, passwdlen); HMAC_SHA256_Update(&PShctx, salt, saltlen); /* Iterate through the blocks. */ for (i = 0; i * 32 < dkLen; i++) { /* Generate INT(i + 1). */ be32enc(ivec, (uint32_t)(i + 1)); /* Compute U_1 = PRF(P, S || INT(i)). */ memcpy(&hctx, &PShctx, sizeof(HMAC_SHA256_CTX)); HMAC_SHA256_Update(&hctx, ivec, 4); HMAC_SHA256_Final(U, &hctx); /* T_i = U_1 ... */ memcpy(T, U, 32); for (j = 2; j <= c; j++) { /* Compute U_j. */ HMAC_SHA256_Init(&hctx, passwd, passwdlen); HMAC_SHA256_Update(&hctx, U, 32); HMAC_SHA256_Final(U, &hctx); /* ... xor U_j ... */ for (k = 0; k < 32; k++) T[k] ^= U[k]; } /* Copy as many bytes as necessary into buf. */ clen = dkLen - i * 32; if (clen > 32) clen = 32; memcpy(&buf[i * 32], T, clen); } /* Clean PShctx, since we never called _Final on it. */ insecure_memzero(&PShctx, sizeof(HMAC_SHA256_CTX)); } scrypt-1.2.0/libcperciva/alg/sha256.h000644 001751 001751 00000005323 12561447061 020712 0ustar00cpercivacperciva000000 000000 #ifndef _SHA256_H_ #define _SHA256_H_ #include #include /* * Use #defines in order to avoid namespace collisions with anyone else's * SHA256 code (e.g., the code in OpenSSL). */ #define SHA256_Init libcperciva_SHA256_Init #define SHA256_Update libcperciva_SHA256_Update #define SHA256_Final libcperciva_SHA256_Final #define SHA256_Buf libcperciva_SHA256_Buf #define SHA256_CTX libcperciva_SHA256_CTX #define HMAC_SHA256_Init libcperciva_HMAC_SHA256_Init #define HMAC_SHA256_Update libcperciva_HMAC_SHA256_Update #define HMAC_SHA256_Final libcperciva_HMAC_SHA256_Final #define HMAC_SHA256_Buf libcperciva_HMAC_SHA256_Buf #define HMAC_SHA256_CTX libcperciva_HMAC_SHA256_CTX /* Context structure for SHA256 operations. */ typedef struct { uint32_t state[8]; uint64_t count; uint8_t buf[64]; } SHA256_CTX; /** * SHA256_Init(ctx): * Initialize the SHA256 context ${ctx}. */ void SHA256_Init(SHA256_CTX *); /** * SHA256_Update(ctx, in, len): * Input ${len} bytes from ${in} into the SHA256 context ${ctx}. */ void SHA256_Update(SHA256_CTX *, const void *, size_t); /** * SHA256_Final(digest, ctx): * Output the SHA256 hash of the data input to the context ${ctx} into the * buffer ${digest}. */ void SHA256_Final(uint8_t[32], SHA256_CTX *); /** * SHA256_Buf(in, len, digest): * Compute the SHA256 hash of ${len} bytes from $in} and write it to ${digest}. */ void SHA256_Buf(const void *, size_t, uint8_t[32]); /* Context structure for HMAC-SHA256 operations. */ typedef struct { SHA256_CTX ictx; SHA256_CTX octx; } HMAC_SHA256_CTX; /** * HMAC_SHA256_Init(ctx, K, Klen): * Initialize the HMAC-SHA256 context ${ctx} with ${Klen} bytes of key from * ${K}. */ void HMAC_SHA256_Init(HMAC_SHA256_CTX *, const void *, size_t); /** * HMAC_SHA256_Update(ctx, in, len): * Input ${len} bytes from ${in} into the HMAC-SHA256 context ${ctx}. */ void HMAC_SHA256_Update(HMAC_SHA256_CTX *, const void *, size_t); /** * HMAC_SHA256_Final(digest, ctx): * Output the HMAC-SHA256 of the data input to the context ${ctx} into the * buffer ${digest}. */ void HMAC_SHA256_Final(uint8_t[32], HMAC_SHA256_CTX *); /** * HMAC_SHA256_Buf(K, Klen, in, len, digest): * Compute the HMAC-SHA256 of ${len} bytes from ${in} using the key ${K} of * length ${Klen}, and write the result to ${digest}. */ void HMAC_SHA256_Buf(const void *, size_t, const void *, size_t, uint8_t[32]); /** * PBKDF2_SHA256(passwd, passwdlen, salt, saltlen, c, buf, dkLen): * Compute PBKDF2(passwd, salt, c, dkLen) using HMAC-SHA256 as the PRF, and * write the output to buf. The value dkLen must be at most 32 * (2^32 - 1). */ void PBKDF2_SHA256(const uint8_t *, size_t, const uint8_t *, size_t, uint64_t, uint8_t *, size_t); #endif /* !_SHA256_H_ */ scrypt-1.2.0/autocrap/configure.ac000644 001751 001751 00000002504 12561447061 020605 0ustar00cpercivacperciva000000 000000 m4_define([SCRYPT_VERS],m4_include([scrypt-version])) AC_INIT([scrypt],SCRYPT_VERS()) AC_CONFIG_AUX_DIR([config.aux]) AM_INIT_AUTOMAKE() AC_PROG_CC AC_PROG_RANLIB # Don't rebuild the configure script. I'm distributing a perfectly good one. AM_MAINTAINER_MODE # Check for clock_gettime. On some systems, this is provided via librt. AC_CHECK_LIB(rt, clock_gettime) AC_CHECK_FUNCS([clock_gettime]) # Check for a linuxy sysinfo syscall; and while we're doing that, check if # struct sysinfo is the old version (total RAM == totalmem) or the new # version (total RAM == totalmem * mem_unit). AC_CHECK_HEADERS([sys/sysinfo.h]) AC_CHECK_FUNCS([sysinfo]) AC_CHECK_TYPES([struct sysinfo], [], [], [[#include ]]) AC_CHECK_MEMBERS([struct sysinfo.totalram, struct sysinfo.mem_unit], [], [], [[#include ]]) # Check if we have , since some systems require it for sysctl # to work. AC_CHECK_HEADERS([sys/param.h]) # Check for . If it exists and it defines HW_USERMEM # and/or HW_MEMSIZE, we'll try using those as memory limits. AC_CHECK_HEADERS([sys/sysctl.h]) # Check for posix_memalign AC_CHECK_FUNCS([posix_memalign]) # Check for mmap so we can work around its absence on Minix AC_CHECK_FUNCS([mmap]) AC_SYS_LARGEFILE AC_CONFIG_HEADERS([config.h]) AC_CONFIG_FILES([Makefile]) AC_OUTPUT scrypt-1.2.0/autocrap/Makefile.am000644 001751 001751 00000003455 12561447061 020361 0ustar00cpercivacperciva000000 000000 AUTOMAKE_OPTIONS= foreign subdir-objects bin_PROGRAMS= scrypt dist_man_MANS=$(scrypt_man_MANS) scrypt_SOURCES= main.c \ libcperciva/alg/sha256.c \ libcperciva/cpusupport/cpusupport_x86_aesni.c \ libcperciva/cpusupport/cpusupport_x86_sse2.c \ libcperciva/crypto/crypto_aes.c \ libcperciva/crypto/crypto_aesctr.c \ libcperciva/crypto/crypto_entropy.c \ libcperciva/util/entropy.c \ libcperciva/util/insecure_memzero.c \ libcperciva/util/readpass.c \ libcperciva/util/warnp.c \ lib/crypto/crypto_scrypt.c \ lib/crypto/crypto_scrypt_smix.c \ lib/scryptenc/scryptenc.c \ lib/scryptenc/scryptenc_cpuperf.c \ lib/util/memlimit.c \ cpusupport-config.h scrypt_CFLAGS= -I $(srcdir)/libcperciva/alg \ -I $(srcdir)/libcperciva/cpusupport \ -I $(srcdir)/libcperciva/crypto \ -I $(srcdir)/libcperciva/util \ -I $(srcdir)/lib/crypto \ -I $(srcdir)/lib/scryptenc \ -I $(srcdir)/lib/util \ -I . -D CPUSUPPORT_CONFIG_FILE=\"cpusupport-config.h\" scrypt_LDADD= -lcrypto libcperciva_aesni.a libscrypt_sse2.a scrypt_man_MANS= scrypt.1 cpusupport-config.h: ( export CC="${CC}"; export CFLAGS="${CFLAGS}"; command -p sh $(srcdir)/libcperciva/cpusupport/Build/cpusupport.sh ) > cpusupport-config.h.tmp && command -p mv cpusupport-config.h.tmp cpusupport-config.h BUILT_SOURCES= cpusupport-config.h CLEANFILES= cpusupport-config.h cpusupport-config.h.tmp noinst_LIBRARIES= libcperciva_aesni.a libcperciva_aesni_a_SOURCES= libcperciva/crypto/crypto_aes_aesni.c libcperciva_aesni_a_CFLAGS= $(scrypt_CFLAGS) \ `. ./cpusupport-config.h; echo $${CFLAGS_X86_AESNI}` noinst_LIBRARIES+= libscrypt_sse2.a libscrypt_sse2_a_SOURCES= lib/crypto/crypto_scrypt_smix_sse2.c libscrypt_sse2_a_CFLAGS= $(scrypt_CFLAGS) \ `. ./cpusupport-config.h; echo $${CFLAGS_X86_SSE2}`