scrypt-1.1.6/000755 001751 001751 00000000000 11324423027 014475 5ustar00cpercivacperciva000000 000000 scrypt-1.1.6/lib/000755 001751 001751 00000000000 11324423024 015240 5ustar00cpercivacperciva000000 000000 scrypt-1.1.6/scrypt.1000644 001751 001751 00000006670 11324423024 016111 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 Usr at most .Ar maxtime seconds of CPU time to compute the derived encryption key. .El 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-1.1.6/FORMAT000644 001751 001751 00000001231 11324423024 015402 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 96 .. 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-1.1.6/main.c000644 001751 001751 00000010537 11324423024 015570 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 "readpass.h" #include "scryptenc.h" #include "warn.h" static void usage(void) { fprintf(stderr, "usage: scrypt {enc | dec} [...] infile [outfile]\n"); exit(1); } int main(int argc, char *argv[]) { FILE * infile = NULL; FILE * outfile = stdout; int dec = 0; size_t maxmem = 0; double maxmemfrac = 0.5; double maxtime = 300.0; char ch; char * passwd; int rc; #ifdef NEED_WARN_PROGNAME warn_progname = "scrypt"; #endif /* 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(); /* Open the input file. */ if ((infile = fopen(argv[0], "r")) == NULL) { warn("Cannot open input file: %s", argv[0]); exit(1); } /* If we have an output file, open it. */ if (argc > 1) { if ((outfile = fopen(argv[1], "w")) == NULL) { warn("Cannot open output file: %s", argv[1]); exit(1); } } /* Prompt for a password. */ if (tarsnap_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. */ memset(passwd, 0, strlen(passwd)); free(passwd); /* If we failed, print the right error message and exit. */ if (rc != 0) { switch (rc) { case 1: warn("Error determining amount of available memory"); break; case 2: warn("Error reading clocks"); break; case 3: warn("Error computing derived key"); break; case 4: warn("Error reading salt"); break; case 5: warn("OpenSSL error"); break; case 6: warn("Error allocating memory"); break; case 7: warnx("Input is not valid scrypt-encrypted block"); break; case 8: warnx("Unrecognized scrypt format version"); break; case 9: warnx("Decrypting file would require too much memory"); break; case 10: warnx("Decrypting file would take too much CPU time"); break; case 11: warnx("Passphrase is incorrect"); break; case 12: warn("Error writing file: %s", (argc > 1) ? argv[1] : "standard output"); break; case 13: warn("Error reading file: %s", argv[0]); break; } exit(1); } return (0); } scrypt-1.1.6/scrypt_platform.h000644 001751 001751 00000000407 11324423024 020074 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-1.1.6/Makefile.in000644 001751 001751 00000112303 11324423027 016542 0ustar00cpercivacperciva000000 000000 # Makefile.in generated by automake 1.10.1 from Makefile.am. # @configure_input@ # Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, # 2003, 2004, 2005, 2006, 2007, 2008 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@ pkgdatadir = $(datadir)/@PACKAGE@ pkglibdir = $(libdir)/@PACKAGE@ pkgincludedir = $(includedir)/@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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See the # GNU General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA # 02110-1301, USA. # As a special exception to the GNU General Public License, if you # distribute this file as part of a program that contains a # configuration script generated by Autoconf, you may include it under # the same distribution terms that you use for the rest of that program. # Originally written by Alexandre Oliva . case $1 in '') echo "$0: No command. Try \`$0 --help' for more information." 1>&2 exit 1; ;; -h | --h*) cat <<\EOF Usage: depcomp [--help] [--version] PROGRAM [ARGS] Run PROGRAMS ARGS to compile a file, generating dependencies as side-effects. Environment variables: depmode Dependency tracking mode. source Source file read by `PROGRAMS ARGS'. object Object file output by `PROGRAMS ARGS'. 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"$tmpdepfile" | sed 's% %\\ %g' | sed -n '/^\(.*\)$/ s::\1\::p' >> "$depfile" rm -f "$tmpdepfile" ;; none) exec "$@" ;; *) echo "Unknown depmode $depmode" 1>&2 exit 1 ;; esac exit 0 # Local Variables: # mode: shell-script # sh-indentation: 2 # eval: (add-hook 'write-file-hooks 'time-stamp) # time-stamp-start: "scriptversion=" # time-stamp-format: "%:y-%02m-%02d.%02H" # time-stamp-end: "$" # End: scrypt-1.1.6/lib/util/000755 001751 001751 00000000000 11324423024 016215 5ustar00cpercivacperciva000000 000000 scrypt-1.1.6/lib/crypto/000755 001751 001751 00000000000 11324423024 016560 5ustar00cpercivacperciva000000 000000 scrypt-1.1.6/lib/scryptenc/000755 001751 001751 00000000000 11324423024 017252 5ustar00cpercivacperciva000000 000000 scrypt-1.1.6/lib/README000644 001751 001751 00000000561 11324423024 016122 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-1.1.6/lib/scryptenc/scryptenc_cpuperf.c000644 001751 001751 00000010470 11324423024 023156 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); /* Could how many scryps 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-1.1.6/lib/scryptenc/scryptenc_cpuperf.h000644 001751 001751 00000003306 11324423024 023163 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-1.1.6/lib/scryptenc/scryptenc.c000644 001751 001751 00000035775 11324423024 021451 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 #include "crypto_aesctr.h" #include "crypto_scrypt.h" #include "memlimit.h" #include "scryptenc_cpuperf.h" #include "sha256.h" #include "sysendian.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 getsalt(uint8_t[32]); 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 getsalt(uint8_t salt[32]) { int fd; ssize_t lenread; uint8_t * buf = salt; size_t buflen = 32; /* Open /dev/urandom. */ if ((fd = open("/dev/urandom", O_RDONLY)) == -1) goto err0; /* Read bytes until we have filled the buffer. */ while (buflen > 0) { if ((lenread = read(fd, buf, buflen)) == -1) goto err1; /* The random device should never EOF. */ if (lenread == 0) goto err1; /* We're partly done. */ buf += lenread; buflen -= lenread; } /* Close the device. */ while (close(fd) == -1) { if (errno != EINTR) goto err0; } /* Success! */ return (0); err1: close(fd); err0: /* Failure! */ return (4); } 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 ((rc = getsalt(salt)) != 0) return (rc); /* 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; 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 (AES_set_encrypt_key(key_enc, 256, &key_enc_exp)) 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); /* 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. */ memset(dk, 0, 64); memset(&key_enc_exp, 0, sizeof(AES_KEY)); /* Success! */ return (0); } /** * scryptdec_buf(inbuf, inbuflen, outbuf, outlen, passwd, passwdlen, * maxmem, maxmemfrac, maxtime): * Decrypt inbuflen bytes fro 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; 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 (AES_set_encrypt_key(key_enc, 256, &key_enc_exp)) 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); *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. */ memset(dk, 0, 64); memset(&key_enc_exp, 0, sizeof(AES_KEY)); /* 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; 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 (AES_set_encrypt_key(key_enc, 256, &key_enc_exp)) 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) return (12); } while (1); crypto_aesctr_free(AES); /* 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. */ memset(dk, 0, 64); memset(&key_enc_exp, 0, sizeof(AES_KEY)); /* 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; AES_KEY key_enc_exp; struct crypto_aesctr * AES; int rc; /* * Read the first 7 bytes of the file; all future version 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 srypt 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 (AES_set_encrypt_key(key_enc, 256, &key_enc_exp)) 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) 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); /* 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. */ memset(dk, 0, 64); memset(&key_enc_exp, 0, sizeof(AES_KEY)); return (0); } scrypt-1.1.6/lib/scryptenc/scryptenc.h000644 001751 001751 00000011161 11324423024 021435 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 /** * 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-1.1.6/lib/crypto/crypto_scrypt-ref.c000644 001751 001751 00000016474 11324423024 022436 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; 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-1.1.6/lib/crypto/crypto_aesctr.h000644 001751 001751 00000004473 11324423024 021622 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_AESCTR_H_ #define _CRYPTO_AESCTR_H_ #include #include /** * 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(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 *); #endif /* !_CRYPTO_AESCTR_H_ */ scrypt-1.1.6/lib/crypto/sha256.c000644 001751 001751 00000025533 11324423024 017744 0ustar00cpercivacperciva000000 000000 /*- * Copyright 2005,2007,2009 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 "sysendian.h" #include "sha256.h" /* * Encode a length len/4 vector of (uint32_t) into a length len vector of * (unsigned char) in big-endian form. Assumes len is a multiple of 4. */ static void be32enc_vect(unsigned char *dst, const uint32_t *src, size_t len) { size_t i; for (i = 0; i < len / 4; i++) be32enc(dst + i * 4, src[i]); } /* * Decode a big-endian length len vector of (unsigned char) into a length * len/4 vector of (uint32_t). Assumes len is a multiple of 4. */ static void be32dec_vect(uint32_t *dst, const unsigned char *src, size_t len) { size_t i; 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 unsigned char 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. */ memset(W, 0, 256); memset(S, 0, 32); t0 = t1 = 0; } static unsigned char 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) { unsigned char 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. */ be32enc_vect(len, ctx->count, 8); /* Add 1--64 bytes so that the resulting length is 56 mod 64 */ r = (ctx->count[1] >> 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); } /* SHA-256 initialization. Begins a SHA-256 operation. */ void SHA256_Init(SHA256_CTX * ctx) { /* Zero bits processed so far */ ctx->count[0] = ctx->count[1] = 0; /* Magic initialization constants */ ctx->state[0] = 0x6A09E667; ctx->state[1] = 0xBB67AE85; ctx->state[2] = 0x3C6EF372; ctx->state[3] = 0xA54FF53A; ctx->state[4] = 0x510E527F; ctx->state[5] = 0x9B05688C; ctx->state[6] = 0x1F83D9AB; ctx->state[7] = 0x5BE0CD19; } /* Add bytes into the hash */ void SHA256_Update(SHA256_CTX * ctx, const void *in, size_t len) { uint32_t bitlen[2]; uint32_t r; const unsigned char *src = in; /* Number of bytes left in the buffer from previous updates */ r = (ctx->count[1] >> 3) & 0x3f; /* Convert the length into a number of bits */ bitlen[1] = ((uint32_t)len) << 3; bitlen[0] = (uint32_t)(len >> 29); /* Update number of bits */ if ((ctx->count[1] += bitlen[1]) < bitlen[1]) ctx->count[0]++; ctx->count[0] += bitlen[0]; /* 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); } /* * SHA-256 finalization. Pads the input data, exports the hash value, * and clears the context state. */ void SHA256_Final(unsigned char digest[32], SHA256_CTX * ctx) { /* Add padding */ SHA256_Pad(ctx); /* Write the hash */ be32enc_vect(digest, ctx->state, 32); /* Clear the context state */ memset((void *)ctx, 0, sizeof(*ctx)); } /* Initialize an HMAC-SHA256 operation with the given key. */ void HMAC_SHA256_Init(HMAC_SHA256_CTX * ctx, const void * _K, size_t Klen) { unsigned char pad[64]; unsigned char khash[32]; const unsigned char * 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. */ memset(khash, 0, 32); } /* Add bytes to the HMAC-SHA256 operation. */ 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); } /* Finish an HMAC-SHA256 operation. */ void HMAC_SHA256_Final(unsigned char digest[32], HMAC_SHA256_CTX * ctx) { unsigned char 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. */ memset(ihash, 0, 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 * 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; /* 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. */ memset(&PShctx, 0, sizeof(HMAC_SHA256_CTX)); } scrypt-1.1.6/lib/crypto/sha256.h000644 001751 001751 00000004561 11324423024 017747 0ustar00cpercivacperciva000000 000000 /*- * Copyright 2005,2007,2009 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. * * $FreeBSD: src/lib/libmd/sha256.h,v 1.2 2006/01/17 15:35:56 phk Exp $ */ #ifndef _SHA256_H_ #define _SHA256_H_ #include #include typedef struct SHA256Context { uint32_t state[8]; uint32_t count[2]; unsigned char buf[64]; } SHA256_CTX; typedef struct HMAC_SHA256Context { SHA256_CTX ictx; SHA256_CTX octx; } HMAC_SHA256_CTX; void SHA256_Init(SHA256_CTX *); void SHA256_Update(SHA256_CTX *, const void *, size_t); void SHA256_Final(unsigned char [32], SHA256_CTX *); void HMAC_SHA256_Init(HMAC_SHA256_CTX *, const void *, size_t); void HMAC_SHA256_Update(HMAC_SHA256_CTX *, const void *, size_t); void HMAC_SHA256_Final(unsigned char [32], HMAC_SHA256_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 *, size_t, const uint8_t *, size_t, uint64_t, uint8_t *, size_t); #endif /* !_SHA256_H_ */ scrypt-1.1.6/lib/crypto/crypto_scrypt-sse.c000644 001751 001751 00000022732 11324423024 022446 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 #include "sha256.h" #include "sysendian.h" #include "crypto_scrypt.h" static void blkcpy(void *, void *, size_t); static void blkxor(void *, void *, size_t); static void salsa20_8(__m128i *); static void blockmix_salsa8(__m128i *, __m128i *, __m128i *, size_t); static uint64_t integerify(void *, size_t); static void smix(uint8_t *, size_t, uint64_t, void *, void *); static void blkcpy(void * dest, void * src, size_t len) { __m128i * D = dest; __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, void * src, size_t len) { __m128i * D = dest; __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(__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(void * B, size_t r) { uint32_t * X = (void *)((uintptr_t)(B) + (2 * r - 1) * 64); return (((uint64_t)(X[13]) << 32) + X[0]); } /** * 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. */ static void smix(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]); } } } /** * 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) { void * B0, * V0, * XY0; uint8_t * B; uint32_t * V; uint32_t * XY; 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 - 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); #ifndef MAP_ANON 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)); #ifndef MAP_ANON if ((V0 = malloc(128 * r * N + 63)) == NULL) goto err2; V = (uint32_t *)(((uintptr_t)(V0) + 63) & ~ (uintptr_t)(63)); #endif #endif #ifdef MAP_ANON 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. */ #ifdef MAP_ANON 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); } scrypt-1.1.6/lib/crypto/crypto_scrypt.h000644 001751 001751 00000004042 11324423024 021655 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 /** * 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-1.1.6/lib/crypto/crypto_scrypt-nosse.c000644 001751 001751 00000021424 11324423024 023000 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 "sha256.h" #include "sysendian.h" #include "crypto_scrypt.h" static void blkcpy(void *, void *, size_t); static void blkxor(void *, void *, size_t); static void salsa20_8(uint32_t[16]); static void blockmix_salsa8(uint32_t *, uint32_t *, uint32_t *, size_t); static uint64_t integerify(void *, size_t); static void smix(uint8_t *, size_t, uint64_t, uint32_t *, uint32_t *); static void blkcpy(void * dest, void * src, size_t len) { size_t * D = dest; 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, void * src, size_t len) { size_t * D = dest; 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(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(void * B, size_t r) { uint32_t * X = (void *)((uintptr_t)(B) + (2 * r - 1) * 64); return (((uint64_t)(X[1]) << 32) + X[0]); } /** * 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. */ static void smix(uint8_t * B, size_t r, uint64_t N, uint32_t * V, uint32_t * XY) { uint32_t * X = XY; uint32_t * Y = &XY[32 * r]; uint32_t * Z = &XY[64 * r]; 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]); } /** * 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) { void * B0, * V0, * XY0; uint8_t * B; uint32_t * V; uint32_t * XY; 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. */ #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); #ifndef MAP_ANON 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)); #ifndef MAP_ANON if ((V0 = malloc(128 * r * N + 63)) == NULL) goto err2; V = (uint32_t *)(((uintptr_t)(V0) + 63) & ~ (uintptr_t)(63)); #endif #endif #ifdef MAP_ANON 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. */ #ifdef MAP_ANON 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); } scrypt-1.1.6/lib/crypto/crypto_aesctr.c000644 001751 001751 00000006714 11324423024 021615 0ustar00cpercivacperciva000000 000000 /*- * Copyright 2007-2009 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 "sysendian.h" #include "crypto_aesctr.h" struct crypto_aesctr { 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(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); AES_encrypt(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; /* Zero potentially sensitive information. */ for (i = 0; i < 16; i++) stream->buf[i] = 0; stream->bytectr = stream->nonce = 0; /* Free the stream. */ free(stream); } scrypt-1.1.6/lib/util/readpass.h000644 001751 001751 00000004321 11324423024 020170 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 _READPASS_H_ #define _READPASS_H_ /** * tarsnap_getpass(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}. The obscure name is to avoid namespace collisions due to the * getpass / readpass / readpassphrase / etc. functions in various libraries. */ int tarsnap_readpass(char **, const char *, const char *, int); #endif /* !_READPASS_H_ */ scrypt-1.1.6/lib/util/memlimit.h000644 001751 001751 00000003443 11324423024 020207 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-1.1.6/lib/util/readpass.c000644 001751 001751 00000010701 11324423024 020162 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 "warn.h" #include "readpass.h" #define MAXPASSLEN 2048 /** * tarsnap_getpass(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}. The obscure name is to avoid namespace collisions due to the * getpass / readpass / readpassphrase / etc. functions in various libraries. */ int tarsnap_readpass(char ** passwd, const char * prompt, const char * confirmprompt, int devtty) { FILE * readfrom; char passbuf[MAXPASSLEN]; char confpassbuf[MAXPASSLEN]; struct termios term, term_old; 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; /* If we're reading from a terminal, try to disable echo. */ if ((usingtty = isatty(fileno(readfrom))) != 0) { if (tcgetattr(fileno(readfrom), &term_old)) { warn("Cannot read terminal settings"); goto err1; } memcpy(&term, &term_old, sizeof(struct termios)); term.c_lflag = (term.c_lflag & ~ECHO) | ECHONL; if (tcsetattr(fileno(readfrom), TCSANOW, &term)) { warn("Cannot set terminal settings"); goto err1; } } 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) { warn("Cannot read password"); goto err2; } /* Confirm the password if necessary. */ if (confirmprompt != NULL) { if (usingtty) fprintf(stderr, "%s: ", confirmprompt); if (fgets(confpassbuf, MAXPASSLEN, readfrom) == NULL) { warn("Cannot read password"); goto err2; } 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); /* Close /dev/tty if we opened it. */ if (readfrom != stdin) fclose(readfrom); /* Copy the password out. */ if ((*passwd = strdup(passbuf)) == NULL) { warn("Cannot allocate memory"); goto err1; } /* Zero any stored passwords. */ memset(passbuf, 0, MAXPASSLEN); memset(confpassbuf, 0, MAXPASSLEN); /* Success! */ return (0); err2: /* Reset terminal settings if necessary. */ if (usingtty) tcsetattr(fileno(readfrom), TCSAFLUSH, &term_old); err1: /* Close /dev/tty if we opened it. */ if (readfrom != stdin) fclose(readfrom); /* Failure! */ return (-1); } scrypt-1.1.6/lib/util/memlimit.c000644 001751 001751 00000016376 11324423024 020213 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_SYSCTL_HW_USERMEM #include #endif #ifdef HAVE_SYS_SYSINFO_H #include #endif #include #include #include #include #ifdef DEBUG #include #endif #include "memlimit.h" #ifdef HAVE_SYSCTL_HW_USERMEM static int memlimit_sysctl_hw_usermem(size_t * memlimit) { int mib[2]; uint8_t usermembuf[8]; size_t usermemlen = 8; uint64_t usermem; /* Ask the kernel how much RAM we have. */ mib[0] = CTL_HW; mib[1] = HW_USERMEM; if (sysctl(mib, 2, usermembuf, &usermemlen, NULL, 0)) return (1); /* * Parse as either a uint64_t or a uint32_t based on the length of * output the kernel reports having copied out. It appears that all * systems providing a sysctl interface for reading integers copy * them out as system-endian values, so we don't need to worry about * parsing them. */ if (usermemlen == sizeof(uint64_t)) usermem = *(uint64_t *)usermembuf; else if (usermemlen == sizeof(uint32_t)) usermem = *(uint32_t *)usermembuf; else return (1); /* Return the sysctl value, but clamp to SIZE_MAX if necessary. */ #if UINT64_MAX > SIZE_MAX if (usermem > SIZE_MAX) *memlimit = SIZE_MAX; else *memlimit = usermem; #else *memlimit = usermem; #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 sysctl_memlimit, sysinfo_memlimit, rlimit_memlimit; size_t sysconf_memlimit; size_t memlimit_min; size_t memavail; /* Get memory limits. */ #ifdef HAVE_SYSCTL_HW_USERMEM if (memlimit_sysctl_hw_usermem(&sysctl_memlimit)) return (1); #else sysctl_memlimit = (size_t)(-1); #endif #ifdef HAVE_SYSINFO if (memlimit_sysinfo(&sysinfo_memlimit)) return (1); #else sysinfo_memlimit = (size_t)(-1); #endif if (memlimit_rlimit(&rlimit_memlimit)) return (1); #ifdef _SC_PHYS_PAGES if (memlimit_sysconf(&sysconf_memlimit)) return (1); #else sysconf_memlimit = (size_t)(-1); #endif #ifdef DEBUG fprintf(stderr, "Memory limits are %zu %zu %zu %zu\n", sysctl_memlimit, sysinfo_memlimit, rlimit_memlimit, sysconf_memlimit); #endif /* Find the smallest of them. */ memlimit_min = (size_t)(-1); if (memlimit_min > sysctl_memlimit) memlimit_min = sysctl_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-1.1.6/lib/util/sysendian.h000644 001751 001751 00000007325 11324423024 020372 0ustar00cpercivacperciva000000 000000 /*- * Copyright 2007-2009 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 _SYSENDIAN_H_ #define _SYSENDIAN_H_ #include "scrypt_platform.h" /* If we don't have be64enc, the we have isn't usable. */ #if !HAVE_DECL_BE64ENC #undef HAVE_SYS_ENDIAN_H #endif #ifdef HAVE_SYS_ENDIAN_H #include #else #include 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 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 /* !HAVE_SYS_ENDIAN_H */ #endif /* !_SYSENDIAN_H_ */ scrypt-1.1.6/lib/util/warn.c000644 001751 001751 00000004303 11324423024 017330 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" #ifdef HAVE_ERR_H /* * Everything is provided through err.h and the associated library, so we * don't need to do anything here. */ #else #include #include #include #include #include "warn.h" const char * warn_progname = "(null)"; void warn(const char * fmt, ...) { va_list ap; va_start(ap, fmt); fprintf(stderr, "%s", warn_progname); 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", warn_progname); if (fmt != NULL) { fprintf(stderr, ": "); vfprintf(stderr, fmt, ap); } fprintf(stderr, "\n"); va_end(ap); } #endif scrypt-1.1.6/lib/util/warn.h000644 001751 001751 00000000337 11324423024 017340 0ustar00cpercivacperciva000000 000000 #ifndef _WARN_H_ #define _WARN_H_ #ifdef HAVE_ERR_H #include #else #define NEED_WARN_PROGNAME const char * warn_progname; void warn(const char *, ...); void warnx(const char *, ...); #endif #endif /* !_WARN_H_ */