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Preamble The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. This General Public License applies to most of the Free Software Foundation's software and to any other program whose authors commit to using it. (Some other Free Software Foundation software is covered by the GNU Lesser General Public License instead.) You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for this service if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things. 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If the software is modified by someone else and passed on, we want its recipients to know that what they have is not the original, so that any problems introduced by others will not reflect on the original authors' reputations. Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, we have made it clear that any patent must be licensed for everyone's free use or not licensed at all. The precise terms and conditions for copying, distribution and modification follow. GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 0. This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any derivative work under copyright law: that is to say, a work containing the Program or a portion of it, either verbatim or with modifications and/or translated into another language. (Hereinafter, translation is included without limitation in the term "modification".) Each licensee is addressed as "you". Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute a work based on the Program (independent of having been made by running the Program). Whether that is true depends on what the Program does. 1. 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If the distribution and/or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces, the original copyright holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries, so that distribution is permitted only in or among countries not thus excluded. In such case, this License incorporates the limitation as if written in the body of this License. 9. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies a version number of this License which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software Foundation. 10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 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. Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) year name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. , 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. yubikey-server-c-0.5/build-aux/0000777000175000017500000000000011330130345013453 500000000000000yubikey-server-c-0.5/build-aux/install-sh0000755000175000017500000003253711271415210015406 00000000000000#!/bin/sh # install - install a program, script, or datafile scriptversion=2009-04-28.21; # UTC # This originates from X11R5 (mit/util/scripts/install.sh), which was # later released in X11R6 (xc/config/util/install.sh) with the # following copyright and license. # # Copyright (C) 1994 X Consortium # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to # deal in the Software without restriction, including without limitation the # rights to use, copy, modify, merge, publish, distribute, sublicense, and/or # sell copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN # AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC- # TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. # # Except as contained in this notice, the name of the X Consortium shall not # be used in advertising or otherwise to promote the sale, use or other deal- # ings in this Software without prior written authorization from the X Consor- # tium. # # # FSF changes to this file are in the public domain. # # Calling this script install-sh is preferred over install.sh, to prevent # `make' implicit rules from creating a file called install from it # when there is no Makefile. # # This script is compatible with the BSD install script, but was written # from scratch. nl=' ' IFS=" "" $nl" # set DOITPROG to echo to test this script # Don't use :- since 4.3BSD and earlier shells don't like it. doit=${DOITPROG-} if test -z "$doit"; then doit_exec=exec else doit_exec=$doit fi # Put in absolute file names if you don't have them in your path; # or use environment vars. chgrpprog=${CHGRPPROG-chgrp} chmodprog=${CHMODPROG-chmod} chownprog=${CHOWNPROG-chown} cmpprog=${CMPPROG-cmp} cpprog=${CPPROG-cp} mkdirprog=${MKDIRPROG-mkdir} mvprog=${MVPROG-mv} rmprog=${RMPROG-rm} stripprog=${STRIPPROG-strip} posix_glob='?' initialize_posix_glob=' test "$posix_glob" != "?" || { if (set -f) 2>/dev/null; then posix_glob= else posix_glob=: fi } ' posix_mkdir= # Desired mode of installed file. mode=0755 chgrpcmd= chmodcmd=$chmodprog chowncmd= mvcmd=$mvprog rmcmd="$rmprog -f" stripcmd= src= dst= dir_arg= dst_arg= copy_on_change=false no_target_directory= usage="\ Usage: $0 [OPTION]... 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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, see . # 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 \`$0 --help' for more information." 1>&2 exit 1; ;; -h | --h*) cat <<\EOF Usage: depcomp [--help] [--version] PROGRAM [ARGS] Run PROGRAMS ARGS to compile a file, generating dependencies as side-effects. Environment variables: depmode Dependency tracking mode. source Source file read by `PROGRAMS ARGS'. object Object file output by `PROGRAMS ARGS'. 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"$@" || exit $? # Remove the call to Libtool. if test "$libtool" = yes; then while test "X$1" != 'X--mode=compile'; do shift done shift fi # Remove `-o $object'. IFS=" " for arg do case $arg in -o) shift ;; $object) shift ;; *) set fnord "$@" "$arg" shift # fnord shift # $arg ;; esac done test -z "$dashmflag" && dashmflag=-M # Require at least two characters before searching for `:' # in the target name. This is to cope with DOS-style filenames: # a dependency such as `c:/foo/bar' could be seen as target `c' otherwise. "$@" $dashmflag | sed 's:^[ ]*[^: ][^:][^:]*\:[ ]*:'"$object"'\: :' > "$tmpdepfile" rm -f "$depfile" cat < "$tmpdepfile" > "$depfile" tr ' ' ' ' < "$tmpdepfile" | \ ## Some versions of the HPUX 10.20 sed can't process this invocation ## correctly. Breaking it into two sed invocations is a workaround. sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; dashXmstdout) # This case only exists to satisfy depend.m4. It is never actually # run, as this mode is specially recognized in the preamble. exit 1 ;; makedepend) "$@" || exit $? # Remove any Libtool call if test "$libtool" = yes; then while test "X$1" != 'X--mode=compile'; do shift done shift fi # X makedepend shift cleared=no eat=no for arg do case $cleared in no) set ""; shift cleared=yes ;; esac if test $eat = yes; then eat=no continue fi case "$arg" in -D*|-I*) set fnord "$@" "$arg"; shift ;; # Strip any option that makedepend may not understand. Remove # the object too, otherwise makedepend will parse it as a source file. -arch) eat=yes ;; -*|$object) ;; *) set fnord "$@" "$arg"; shift ;; esac done obj_suffix=`echo "$object" | sed 's/^.*\././'` touch "$tmpdepfile" ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@" rm -f "$depfile" cat < "$tmpdepfile" > "$depfile" sed '1,2d' "$tmpdepfile" | tr ' ' ' ' | \ ## Some versions of the HPUX 10.20 sed can't process this invocation ## correctly. 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IFS=" " for arg do case $arg in -o) shift ;; $object) shift ;; *) set fnord "$@" "$arg" shift # fnord shift # $arg ;; esac done "$@" -E | sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \ -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' | sed '$ s: \\$::' > "$tmpdepfile" rm -f "$depfile" echo "$object : \\" > "$depfile" cat < "$tmpdepfile" >> "$depfile" sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; msvisualcpp) # Important note: in order to support this mode, a compiler *must* # always write the preprocessed file to stdout. "$@" || exit $? # Remove the call to Libtool. if test "$libtool" = yes; then while test "X$1" != 'X--mode=compile'; do shift done shift fi IFS=" " for arg do case "$arg" in -o) shift ;; $object) shift ;; "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI") set fnord "$@" shift shift ;; *) set fnord "$@" "$arg" shift shift ;; esac done "$@" -E 2>/dev/null | sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile" rm -f "$depfile" echo "$object : \\" > "$depfile" sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s:: \1 \\:p' >> "$depfile" echo " " >> "$depfile" sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile" rm -f "$tmpdepfile" ;; msvcmsys) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;; none) exec "$@" ;; *) echo "Unknown depmode $depmode" 1>&2 exit 1 ;; esac exit 0 # Local Variables: # mode: shell-script # sh-indentation: 2 # eval: (add-hook 'write-file-hooks 'time-stamp) # time-stamp-start: "scriptversion=" # time-stamp-format: "%:y-%02m-%02d.%02H" # time-stamp-time-zone: "UTC" # time-stamp-end: "; # UTC" # End: yubikey-server-c-0.5/Makefile.am0000644000175000017500000000001711271414303013532 00000000000000 SUBDIRS = src yubikey-server-c-0.5/src/0000777000175000017500000000000011330130345012350 500000000000000yubikey-server-c-0.5/src/util.c0000644000175000017500000001175711271414303013423 00000000000000/* Copyright (C) 2009 Tollef Fog Heen This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 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. */ #include #include #include #include #include #include #include "util.h" void *ysc_memdup(void *p, size_t len) { void *r; r = malloc(len); assert(r != NULL); memcpy(r, p, len); return r; } size_t ysc_nstrstr(const char *haystack, const char *needle) { size_t n = 0; while ((haystack = strstr(haystack, needle)) != NULL) { n++; haystack += strlen(needle); } return n; } /* Like strftime, but better, calls strftime under the hood %N => nanoseconds (not implemented) %v => milliseconds if tv is null, call gettimeofday for you */ size_t ysc_strftime(char *s, size_t max, const char *format, const struct timeval *tv) { struct tm tm; int i, j, flen; struct timeval tvv; /* '%v' is two bytes less than what a %v needs */ size_t fdup_len = strlen(format) + ysc_nstrstr(format, "%v") * 2; char *fdup = malloc(fdup_len); /* XXX check failure */ size_t r; if (tv == NULL) assert(gettimeofday(&tvv, NULL) == 0); else { memcpy(&tvv, tv, sizeof(struct timeval)); } gmtime_r(&tvv.tv_sec, &tm); /* Do %N and %v first, then hand off to strftime */ flen = strlen(format); for (i = 0, j = 0; i < flen; i++, j++) { if (format[i] == '%') { switch (format[i+1]) { /* case 'N': break; */ case 'v': j += snprintf(fdup+j, 4, "%.3zd", tvv.tv_usec / 1000); i++; continue; break; default: fdup[j] = format[i]; continue; } } else { fdup[j] = format[i]; } } r = strftime(s, max, fdup, &tm); free(fdup); return r; } /* Base 64 functions */ /* * AUTHOR: Bob Trower 08/04/01 * * COPYRIGHT: Copyright (c) Trantor Standard Systems Inc., 2001 * * LICENCE: Copyright (c) 2001 Bob Trower, Trantor Standard Systems Inc. * * Permission is hereby granted, free of charge, to any person * obtaining a copy of this software and associated documentation * files (the "Software"), to deal in the Software without * restriction, including without limitation the rights to use, copy, * modify, merge, publish, distribute, sublicense, and/or sell copies * of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ unsigned char cb64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; static void ysc_b64_encodeblock(unsigned char in[3], unsigned char out[4], int len) { out[0] = cb64[in[0] >> 2]; out[1] = cb64[((in[0] & 0x03) << 4) | ((in[1] & 0xf0) >> 4)]; out[2] = (unsigned char) (len > 1 ? cb64[((in[1] & 0x0f) << 2) | (len > 2 ? ((in[2] & 0xc0) >> 6) : 0 )] : '='); out[3] = (unsigned char) (len > 2 ? cb64[in[2] & 0x3f] : '='); } char *ysc_b64_encode(char *s, ssize_t len) { char *r = calloc((len/3+1)*4+1, 1); char *tmp = r; unsigned char out[4]; while (len > 0) { ysc_b64_encodeblock((unsigned char*)s, out, len); memcpy(tmp, out, 4); tmp += 4; len -= 3; s += 3; } return r; } static void ysc_b64_decodeblock(unsigned const char in[4], unsigned char out[3]) { out[0] = (unsigned char) ((in[0] - 'A') << 2 | (in[1] - 'A') >> 4); out[1] = (unsigned char) ((in[1] - 'A') << 4 | (in[2] - 'A') >> 2); out[2] = (unsigned char) ((((in[2] - 'A') << 6) & 0xc0) | (in[3] - 'A')); } ssize_t ysc_b64_decode(const char *s, char **decoded) { ssize_t len = strlen(s); char *tmp; unsigned char out[3]; ssize_t r = 0; *decoded = malloc((len/4+1)*3+1); tmp = *decoded; if ((len % 4) != 0) { return 0; /* XXX free memory */ } while (*s != '\0') { ysc_b64_decodeblock((unsigned char*)s, out); memcpy(tmp, out, 3); tmp += 3; if (s[2] == '=') { r 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# Otherwise a system limit (for SysV at least) may be exceeded. .NOEXPORT: yubikey-server-c-0.5/src/config.h.in0000644000175000017500000000131611330130345014310 00000000000000/* src/config.h.in. Generated from configure.ac by autoheader. */ /* Define to 1 if you have the `yubikey' library (-lyubikey). */ #undef HAVE_LIBYUBIKEY /* Name of package */ #undef PACKAGE /* Define to the address where bug reports for this package should be sent. */ #undef PACKAGE_BUGREPORT /* Define to the full name of this package. */ #undef PACKAGE_NAME /* Define to the full name and version of this package. */ #undef PACKAGE_STRING /* Define to the one symbol short name of this package. */ #undef PACKAGE_TARNAME /* Define to the home page for this package. */ #undef PACKAGE_URL /* Define to the version of this package. */ #undef PACKAGE_VERSION /* Version number of package */ #undef VERSION yubikey-server-c-0.5/src/main.c0000644000175000017500000004133211330125350013357 00000000000000/* yubikey-server-c — a yubikey validation server written in C Copyright (C) 2009 Tollef Fog Heen This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 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. */ #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "util.h" #include "config.h" #ifdef UNUSED #elif defined(__GNUC__) # define UNUSED(x) UNUSED_ ## x __attribute__((unused)) #elif defined(__LCLINT__) # define UNUSED(x) /*@unused@*/ x #else # define UNUSED(x) x #endif struct ykc_config { char *pidfile; char *user; int uid; char *group; int gid; char *dbdef; int port; int log_otp; }; PGconn *db_conn; struct ykc_stats { int active; char *public_id; char *secret_uid; char *secret_key; int session_counter; int session_use; }; char *get_timestamp(void) { size_t len = strlen("YYYY-mm-ddTHH:MM:SSZMSMS"); char *ts = malloc(len + 1); ysc_strftime(ts, len + 1, "%FT%TZ%v", NULL); return ts; } int validate_signature(const char *key, size_t key_len, const char *h, const char *id, const char *otp) { char *line = NULL; char *our_sig = NULL; gcry_md_hd_t hd; int r = 0; asprintf(&line, "id=%s&otp=%s", id, otp); if (line == NULL) { r = -1; goto free_mem; } gcry_md_open(&hd, GCRY_MD_SHA1, GCRY_MD_FLAG_HMAC); if (hd == NULL) { r = -1; goto free_mem; } gcry_md_setkey(hd, key, key_len); gcry_md_write(hd, line, strlen(line)); gcry_md_final(hd); our_sig = ysc_b64_encode((char *) gcry_md_read(hd, 0), gcry_md_get_algo_dlen(GCRY_MD_SHA1)); if (our_sig == NULL || strcmp(our_sig, h) != 0) { r = -1; goto free_mem; } free_mem: gcry_md_close(hd); free(line); free(our_sig); return r; } char *sign_request(char *key, size_t key_len, char *info, char *status, char *timestamp) { char *line; char *ret; gcry_md_hd_t hd; if (info != NULL) { asprintf(&line, "info=%s&status=%s×tamp=%s", info, status, timestamp); } else { asprintf(&line, "status=%s×tamp=%s", status, timestamp); } /* XXX Check memory allocation */ gcry_md_open(&hd, GCRY_MD_SHA1, GCRY_MD_FLAG_HMAC); gcry_md_setkey(hd, key, key_len); gcry_md_write(hd, line, strlen(line)); gcry_md_final(hd); ret = ysc_b64_encode((char *) gcry_md_read(hd, 0), gcry_md_get_algo_dlen(GCRY_MD_SHA1)); gcry_md_close(hd); free(line); return ret; } static int send_response(struct MHD_Connection *conn, const char *signature, const char *status, const char *info, const char *timestamp) { char *resp_text, *t; int r; size_t r_l; struct MHD_Response *response; r_l = strlen("h=\nstatus=\ntimestamp=\ninfo="); /* This is a maximum * of static strings */ r_l += (signature != NULL ? strlen(signature) : 0); r_l += (status != NULL ? strlen(status) : 0); r_l += (info != NULL ? strlen(info) : 0); r_l += (timestamp != NULL ? strlen(timestamp) : 0); resp_text = malloc(r_l + 1); t = resp_text; if (signature) { t += sprintf(t, "h=%s\n", signature); } if (info) { t += sprintf(t, "info=%s\n", info); } if (timestamp) { t += sprintf(t, "timestamp=%s\n", timestamp); } if (status) { t += sprintf(t, "status=%s\n", status); } /* XXX error checking above */ response = MHD_create_response_from_data(strlen(resp_text), resp_text, MHD_YES, MHD_YES); r = MHD_queue_response(conn, MHD_HTTP_OK, response); MHD_destroy_response(response); free(resp_text); if (r == MHD_YES) return 0; return -1; } static int get_shared_secret(const char *id, char **shared_secret, size_t *shared_secret_len) { const char *paramValues[1]; PGresult *res; int r = 0; /* Do query to grab shared secret, we need this later anyway */ paramValues[0] = id; res = PQexecParams(db_conn, "SELECT secret FROM shared_secret WHERE secret_id = $1", 1, /* one param */ NULL, /* let the backend deduce param type */ paramValues, NULL, /* don't need param lengths since text */ NULL, /* default to all text params */ 1); /* ask for binary results */ if (PQresultStatus(res) != PGRES_TUPLES_OK) { syslog(LOG_ERR, "Failed to get shared secret for id=%s: %s", id, PQerrorMessage(db_conn)); r = -1; goto free_mem; /* XXX Return error object */ } if (PQntuples(res) == 0) { syslog(LOG_INFO, "No such id: %s", id); /* XXX Better handling */ r = -1; goto free_mem; } *shared_secret_len = PQgetlength(res, 0, 0); *shared_secret = malloc(*shared_secret_len); if (*shared_secret == NULL) { *shared_secret_len = 0; goto free_mem; } memcpy(*shared_secret, PQgetvalue(res, 0, 0), *shared_secret_len); free_mem: PQclear(res); return r; } static int split_otp(const char *otp, char **user, char **s_otp) { size_t otp_len, i, j; /* Modhex doubles the length of the string, so grab the last * YUBIKEY_BLOCK_SIZE * 2 octets to get the actual OTP */ otp_len = strlen(otp); assert(otp_len > YUBIKEY_BLOCK_SIZE * 2); assert(yubikey_modhex_p(otp)); i = otp_len - YUBIKEY_BLOCK_SIZE * 2; *user = malloc(i+1); if (*user == NULL) { return -1; } memcpy(*user, otp, i); (*user)[i] = '\0'; j = YUBIKEY_BLOCK_SIZE * 2; *s_otp = malloc(j+1); if (*s_otp == NULL) { free(*user); return -1; } memcpy(*s_otp, otp + i, j); (*s_otp)[j] = '\0'; return 0; } static int set_data_for_uid(char *uid, struct ykc_stats *stats) { PGresult *res; const char *paramValues[3]; char ctr[10], use[10]; int r = 0; paramValues[0] = uid; snprintf(ctr, sizeof (ctr), "%d", stats->session_counter); snprintf(use, sizeof (use), "%d", stats->session_use); paramValues[1] = ctr; paramValues[2] = use; res = PQexecParams(db_conn, "UPDATE yubikey SET session_counter = $2, " "session_use = $3 WHERE public_id = $1", 3, /* number of params */ NULL, /* let the backend deduce param type */ paramValues, NULL, NULL, 1); /* ask for binary results */ if (PQresultStatus(res) != PGRES_COMMAND_OK) { syslog(LOG_ERR, "UPDATE for %s failed: %s", uid, PQerrorMessage(db_conn)); r = -1; goto free_mem; } assert(PQntuples(res) == 0); free_mem: PQclear(res); return r; } static int get_data_for_uid(char *uid, struct ykc_stats *stats) { PGresult *res; const char *paramValues[1]; char *tmp; int r = 0; paramValues[0] = uid; res = PQexecParams(db_conn, "SELECT active, secret_uid, secret_key, " "session_counter, session_use FROM yubikey " "WHERE public_id = $1", 1, /* one param */ NULL, /* let the backend deduce param type */ paramValues, NULL, NULL, /* default to all text params */ 1); /* ask for binary results */ if (PQresultStatus(res) != PGRES_TUPLES_OK) { syslog(LOG_ERR, "Failed to get shared secret for uid=%s: %s", uid, PQerrorMessage(db_conn)); r = -1; goto free_mem; } if (PQntuples(res) == 0) { syslog(LOG_INFO, "uid %s not found in database", uid); /* XXX Better handling */ r = -1; goto free_mem; } assert(PQgetlength(res, 0, PQfnumber(res, "secret_key")) == YUBIKEY_KEY_SIZE); stats->secret_key = ysc_memdup( PQgetvalue(res, 0, PQfnumber(res, "secret_key")), PQgetlength(res, 0, PQfnumber(res, "secret_key"))); if (stats->secret_key == NULL) { r = -1; goto free_mem; } stats->secret_uid = ysc_memdup( PQgetvalue(res, 0, PQfnumber(res, "secret_uid")), PQgetlength(res, 0, PQfnumber(res, "secret_uid"))); if (stats->secret_uid == NULL) { r = -1; goto free_mem; } tmp = PQgetvalue(res, 0, PQfnumber(res, "session_counter")); assert(tmp != NULL); /* DB schema should enforce this */ stats->session_counter = ntohl(*((uint32_t *) tmp)); tmp = PQgetvalue(res, 0, PQfnumber(res, "session_use")); assert(tmp != NULL); /* DB schema should enforce this */ stats->session_use = ntohl(*((uint32_t *) tmp)); stats->public_id = NULL; free_mem: PQclear(res); return r; } static int handle_request(void * priv, struct MHD_Connection *conn, const char * url, const char *UNUSED(method), const char *UNUSED(version), const char *UNUSED(upload_data), size_t *UNUSED(upload_data_size), void **UNUSED(con_cls)) { const char *id = NULL, *otp = NULL, *h = NULL; char *uid = NULL, *otp_token = NULL; char *signature = NULL, *status = NULL, *info = NULL, *timestamp = NULL; char *shared_secret = NULL; size_t shared_secret_len; yubikey_token_st token; struct ykc_stats stats; struct ykc_config *conf = (struct ykc_config*) priv; memset(&token, '\0', sizeof(token)); memset(&stats, '\0', sizeof(stats)); timestamp = get_timestamp(); assert(timestamp != NULL); /* Parse query string, grab id, otp and h (optional) */ id = MHD_lookup_connection_value(conn, MHD_GET_ARGUMENT_KIND, "id"); otp = MHD_lookup_connection_value(conn, MHD_GET_ARGUMENT_KIND, "otp"); h = MHD_lookup_connection_value(conn, MHD_GET_ARGUMENT_KIND, "h"); syslog(LOG_DEBUG, "Got new connection with parameters: " "url=%s id=%s otp=%s, h=%s\n", url, id, (conf->log_otp ? otp : ""), h); /* Do query to grab shared secret, we need this later anyway */ if (get_shared_secret(id, &shared_secret, &shared_secret_len) < 0) { /* XXX: Something blew up, assume no such ID */ status = "NO_SUCH_CLIENT"; send_response(conn, NULL, status, NULL, timestamp); goto free_mem; } if (otp == NULL) { info = "otp"; status = "MISSING_PARAMETER"; signature = sign_request(shared_secret, shared_secret_len, info, status, timestamp); send_response(conn, signature, status, NULL, timestamp); goto free_mem; } if (! yubikey_modhex_p(otp) || strlen(otp) < (YUBIKEY_BLOCK_SIZE * 2 + 1)) { status = "BAD_OTP"; signature = sign_request(shared_secret, shared_secret_len, NULL, status, timestamp); send_response(conn, signature, status, NULL, timestamp); goto free_mem; } if (h != NULL) { if (validate_signature(shared_secret, shared_secret_len, h, id, otp) < 0) { status = "BAD_SIGNATURE"; signature = sign_request(shared_secret, shared_secret_len, NULL, status, timestamp); send_response(conn, signature, status, NULL, timestamp); goto free_mem; } } /* Validate OTP */ /* Find public uid, if possible */ split_otp(otp, &uid, &otp_token); if (get_data_for_uid(uid, &stats) < 0) { status = "BAD_OTP"; signature = sign_request(shared_secret, shared_secret_len, NULL, status, timestamp); send_response(conn, signature, status, NULL, timestamp); goto free_mem; } /* Argh, yubikey_parse takes in one modhex-ed token (but * requires us to strip the public id first, and an unencoded aes key*/ yubikey_parse((uint8_t*)(otp_token), (const uint8_t *)stats.secret_key, &token); if (!yubikey_crc_ok_p((void*)&token) || memcmp(token.uid, stats.secret_uid, YUBIKEY_UID_SIZE) != 0) { status = "BAD_OTP"; signature = sign_request(shared_secret, shared_secret_len, NULL, status, timestamp); send_response(conn, signature, status, NULL, timestamp); goto free_mem; return MHD_YES; } if (yubikey_counter(token.ctr) < stats.session_counter || (yubikey_counter(token.ctr) == stats.session_counter && token.use <= stats.session_use)) { /* Replay */ status = "REPLAYED_OTP"; signature = sign_request(shared_secret, shared_secret_len, NULL, status, timestamp); send_response(conn, signature, status, NULL, timestamp); syslog(LOG_NOTICE, "Replay attempt for otp=%s, id=%s, uid=%s", otp, id, uid); goto free_mem; } /* Update status, if appropriate */ free(stats.public_id); free(stats.secret_uid); free(stats.secret_key); memset(&stats, 0, sizeof(struct ykc_stats)); stats.session_counter = yubikey_counter(token.ctr); stats.session_use = token.use; set_data_for_uid(uid, &stats); /* Generate response, sign it */ syslog(LOG_INFO, "OK request for otp=%s, id=%s, uid=%s", otp, id, uid); status = "OK"; signature = sign_request(shared_secret, shared_secret_len, NULL, status, timestamp); send_response(conn, signature, status, NULL, timestamp); free_mem: free(timestamp); free(shared_secret); free(signature); free(stats.public_id); free(stats.secret_uid); free(stats.secret_key); free(uid); free(otp_token); return MHD_YES; } void print_usage() { printf("yubikeyd [-c conffile] [-V] [-f] [-h]\n"); printf("\n"); printf("-c conffile - use configuration file\n"); printf("-V - print version\n"); printf("-f - keep in foreground\n"); printf("-h - this help\n"); exit(0); } void print_version(void) { printf("yubikeyd %s\n", VERSION); exit(0); } int parse_config(const char *file, struct ykc_config *c) { FILE *f; char line[4096]; char *key, *value; f = fopen(file, "r"); if (f == NULL) { fprintf(stderr, "Can't open configuration file %s: %s; exiting", file, strerror(errno)); exit(1); } while (fgets(line, sizeof(line), f) != NULL) { if (line[0] == '#' || line[0] == '\n') continue; if ((value = index(line, '\n')) != NULL) { *value = '\0'; } if ((value = index(line, '=')) == NULL) { /* XXX complain */ continue; } key = line; *value = '\0'; value++; if (strcmp(key, "pidfile") == 0) { c->pidfile = strdup(value); continue; } if (strcmp(key, "user") == 0) { struct passwd *p; p = getpwnam(value); c->user = strdup(value); c->uid = p->pw_uid; continue; } if (strcmp(key, "group") == 0) { struct group *g; g = getgrnam(value); c->group = strdup(value); c->gid = g->gr_gid; continue; } if (strcmp(key, "dbdef") == 0) { c->dbdef = strdup(value); continue; } if (strcmp(key, "port") == 0) { c->port = strtol(value, NULL, 0); continue; } if (strcmp(key, "log_otp") == 0) { c->log_otp = strtol(value, NULL, 0); continue; } } return 0; } int main(int argc, char ** argv) { struct MHD_Daemon *d; int opt; const char *config; int foreground = 0; struct ykc_config conf; FILE *pidfd; while ((opt = getopt(argc, argv, "c:p:vfh")) != -1) { switch (opt) { case 'c': config = optarg; break; case 'f': foreground = 1; break; case 'V': print_version(); break; case 'h': default: print_usage(); break; } } openlog("yubikeyd", LOG_PID, LOG_AUTHPRIV); syslog(LOG_NOTICE, "yubikeyd version %s starting up", VERSION); /* XXX return value */ parse_config(config, &conf); d = MHD_start_daemon(MHD_USE_DEBUG, conf.port, NULL, /* Access policy handler */ NULL, /* Data to access policy handler */ handle_request, /* default handler for all URIs */ &conf, /* Data for default handler */ MHD_OPTION_END); if (d == NULL) { syslog(LOG_ERR, "could not start daemon, unsure why\n"); perror("Error starting yubikeyd"); exit(1); } /*XXX return value */ if (setregid(conf.gid, conf.gid) < 0) { perror("changing group id"); exit(1); } if (setreuid(conf.uid, conf.uid) < 0) { perror("changing group id"); exit(1); } /* XXX check errors */ gcry_check_version("0"); gcry_control(GCRYCTL_INIT_SECMEM, 16384); db_conn = PQconnectdb(conf.dbdef); if (PQstatus(db_conn) != CONNECTION_OK) { syslog(LOG_ERR, "connection to database failed: %s", PQerrorMessage(db_conn)); exit(1); } if (!foreground) daemon(0, 0); unlink(conf.pidfile); /* XXX ignore errors? */ pidfd = fopen(conf.pidfile, "wx"); if (! pidfd) { perror("Error opening pid file"); syslog(LOG_ERR, "could not open pid file: %s\n", strerror(errno)); exit(1); } fprintf(pidfd, "%d\n", getpid()); fclose(pidfd); while (1) { fd_set rs, ws, es; int max_fd = 0; unsigned long long timeout; struct timeval tv; FD_ZERO(&rs); FD_ZERO(&ws); FD_ZERO(&es); if (MHD_get_fdset(d, &rs, &ws, &es, &max_fd) == MHD_NO) { MHD_stop_daemon(d); exit(1); } if (MHD_get_timeout(d, &timeout) == MHD_NO) { timeout = 0; } tv.tv_usec = (timeout % 1000) * 1000; tv.tv_sec = timeout / 1000; if (timeout == 0) { select(max_fd+1, &rs, &ws, &es, NULL); } else { select(max_fd+1, &rs, &ws, &es, &tv); } if (MHD_run(d) == MHD_NO) { MHD_stop_daemon(d); exit(1); } } MHD_stop_daemon (d); PQfinish(db_conn); return 0; } yubikey-server-c-0.5/src/Makefile.am0000644000175000017500000000033111330125350014315 00000000000000 sbin_PROGRAMS = yubikeyd yubikeyd_SOURCES = main.c util.c yubikeyd_CFLAGS = @libmicrohttpd_CFLAGS@ @POSTGRESQL_CFLAGS@ @LIBGCRYPT_CFLAGS@ yubikeyd_LDADD = @libmicrohttpd_LIBS@ @POSTGRESQL_LDFLAGS@ @LIBGCRYPT_LIBS@