3 * $Id: dsig.c,v 1.1 2000/06/17 10:54:29 mdw Exp $
5 * Verify signatures on distribuitions of files
7 * (c) 2000 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
14 * Catacomb is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU Library General Public License as
16 * published by the Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version.
19 * Catacomb is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU Library General Public License for more details.
24 * You should have received a copy of the GNU Library General Public
25 * License along with Catacomb; if not, write to the Free
26 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 /*----- Revision history --------------------------------------------------*
33 * Revision 1.1 2000/06/17 10:54:29 mdw
34 * Program to generate and verify signatures on multiple files.
38 /*----- Header files ------------------------------------------------------*/
48 #include <mLib/alloc.h>
49 #include <mLib/base64.h>
50 #include <mLib/mdwopt.h>
51 #include <mLib/quis.h>
52 #include <mLib/report.h>
67 /*----- Digital signature algorithm ---------------------------------------*/
69 static int dsasign(key *k, const void *m, size_t msz, dstr *d)
72 key_packstruct ks[DSA_PRIVFETCHSZ];
78 kp = key_fetchinit(dsa_privfetch, ks, &dp);
79 if ((e = key_fetch(kp, k)) != 0) {
83 sz = mp_octets(dp.dp.q);
86 rand_get(RAND_GLOBAL, p, sz);
87 dsa_sign(&dp.dp, dp.x, m, msz, p, sz, p, sz, p + sz, sz);
93 static int dsaverify(key *k, const void *m, size_t msz,
94 const void *s, size_t ssz)
97 key_packstruct ks[DSA_PUBFETCHSZ];
102 kp = key_fetchinit(dsa_pubfetch, ks, &dp);
103 if ((e = key_fetch(kp, k)) != 0) {
108 e = dsa_verify(&dp.dp, dp.y, m, msz, s, sz, s + sz, sz);
113 /*----- RSA signing -------------------------------------------------------*/
115 static int rsasign(key *k, const void *m, size_t msz, dstr *d)
118 key_packstruct ks[RSA_PRIVFETCHSZ];
125 kp = key_fetchinit(rsa_privfetch, ks, &rp);
126 if ((e = key_fetch(kp, k)) != 0) {
130 sz = mp_octets(rp.n);
132 die(EXIT_FAILURE, "key too small (help!)");
135 memcpy(p + sz - msz, m, msz);
138 memset(p + 2, 0xff, sz - msz - 3);
140 memcpy(p + sz - msz, m, msz);
141 x = mp_loadb(MP_NEW, p, sz);
142 x = rsa_decrypt(&rp, x, x, &rand_global);
150 static int rsaverify(key *k, const void *m, size_t msz,
151 const void *s, size_t ssz)
154 key_packstruct ks[RSA_PUBFETCHSZ];
164 kp = key_fetchinit(rsa_pubfetch, ks, &rp);
165 if ((e = key_fetch(kp, k)) != 0) {
169 x = mp_loadb(MP_NEW, s, ssz);
170 mpmont_create(&mm, rp.n);
171 x = mpmont_exp(&mm, x, x, rp.e);
173 sz = mp_octets(rp.n);
178 if (msz + 11 >= sz || p[0] != 0 || p[1] != 1 || p[sz - msz - 1] != 0)
180 for (i = 2; i < sz - msz - 1; i++) {
184 if (memcmp(m, p + sz - msz, msz) != 0)
192 /*----- Algorithm choice --------------------------------------------------*/
197 int (*sign)(key */*k*/, const void */*m*/, size_t /*msz*/, dstr */*d*/);
198 int (*verify)(key */*k*/, const void */*m*/, size_t /*msz*/,
199 const void */*s*/, size_t /*ssz*/);
202 static const gchash *hashtab[] = { &rmd160, &sha, &md5, 0 };
203 static sig sigtab[] = {
204 { "dsa", "dsig-dsa", dsasign, dsaverify },
205 { "rsa", "dsig-rsa", rsasign, rsaverify },
209 /* --- @gethash@ --- *
211 * Arguments: @const char *name@ = pointer to name string
213 * Returns: Pointer to appropriate hash class.
215 * Use: Chooses a hash function by name.
218 static const gchash *gethash(const char *name)
220 const gchash **g, *gg = 0;
221 size_t sz = strlen(name);
222 for (g = hashtab; *g; g++) {
223 if (strncmp(name, (*g)->name, sz) == 0) {
224 if ((*g)->name[sz] == 0) {
236 /* --- @getsig@ --- *
238 * Arguments: @const char *name@ = pointer to name string
240 * Returns: Pointer to appropriate signature type.
242 * Use: Chooses a signature algorithm by name.
245 static sig *getsig(const char *name)
248 size_t sz = strlen(name);
249 for (s = sigtab; s->name; s++) {
250 if (strncmp(name, s->name, sz) == 0) {
251 if (s->name[sz] == 0) {
263 /*----- Data formatting ---------------------------------------------------*/
265 /* --- Binary data structure --- *
267 * The binary format, which is used for hashing and for the optional binary
268 * output, consists of a sequence of tagged blocks. The tag describes the
269 * format and meaining of the following data.
273 /* --- Block tags --- */
275 T_IDENT = 0, /* An identifying marker */
276 T_SIGALG, /* Signature algorithm used */
277 T_HASHALG, /* Hash algorithm used */
278 T_KEYID, /* Key identifier */
279 T_BEGIN, /* Begin hashing here */
280 T_COMMENT = T_BEGIN, /* A textual comment */
281 T_DATE, /* Creation date of signature */
282 T_EXPIRE, /* Expiry date of signature */
283 T_FILE, /* File and corresponding hash */
284 T_SIGNATURE, /* Final signature block */
286 /* --- Error messages --- */
294 /* --- Name translation table --- */
296 static const char *tagtab[] = {
297 "ident:", "sigalg:", "hashalg:", "keyid:",
298 "comment:", "date:", "expires:", "file:",
303 static const char *errtab[] = {
305 "Unexpected end-of-file",
306 "Binary object too large",
311 /* --- Memory representation of block types --- */
313 typedef struct block {
314 int tag; /* Type tag */
315 dstr d; /* String data */
316 dstr b; /* Binary data */
317 time_t t; /* Timestamp */
318 uint32 k; /* Keyid */
321 /* --- @getstring@ --- *
323 * Arguments: @FILE *fp@ = stream from which to read
324 * @dstr *d@ = destination string
325 * @unsigned raw@ = raw or cooked read
327 * Returns: Zero if OK, nonzero on end-of-file.
329 * Use: Reads a filename (or something similar) from a stream.
332 static int getstring(FILE *fp, dstr *d, unsigned raw)
337 /* --- Raw: just read exactly what's written up to a null byte --- */
340 if ((ch = getc(fp)) == EOF)
346 if ((ch = getc(fp)) == EOF)
353 /* --- Skip as far as whitespace --- *
355 * Also skip past comments.
360 while (isspace((unsigned char)ch))
363 do ch = getc(fp); while (ch != '\n' && ch != EOF);
369 /* --- If the character is a quote then read a quoted string --- */
381 /* --- Now read all sorts of interesting things --- */
385 /* --- Handle an escaped thing --- */
392 case 'a': ch = '\n'; break;
393 case 'b': ch = '\b'; break;
394 case 'f': ch = '\f'; break;
395 case 'n': ch = '\n'; break;
396 case 'r': ch = '\r'; break;
397 case 't': ch = '\t'; break;
398 case 'v': ch = '\v'; break;
404 /* --- If it's a quote or some other end marker then stop --- */
406 if (ch == q || (!q && isspace((unsigned char)ch)))
409 /* --- Otherwise contribute and continue --- */
412 if ((ch = getc(fp)) == EOF)
422 /* --- @putstring@ --- *
424 * Arguments: @FILE *fp@ = stream to write on
425 * @const char *p@ = pointer to text
426 * @unsigned raw@ = whether the string is to be written raw
430 * Use: Emits a string to a stream.
433 static void putstring(FILE *fp, const char *p, unsigned raw)
435 size_t sz = strlen(p);
439 /* --- Just write the string null terminated if raw --- */
442 fwrite(p, 1, sz + 1, fp);
446 /* --- Check for any dodgy characters --- */
449 for (q = p; *q; q++) {
450 if (isspace((unsigned char)*q)) {
459 /* --- Emit the string --- */
461 for (q = p; *q; q++) {
463 case '\a': fputc('\\', fp); fputc('a', fp); break;
464 case '\b': fputc('\\', fp); fputc('b', fp); break;
465 case '\f': fputc('\\', fp); fputc('f', fp); break;
466 case '\n': fputc('\\', fp); fputc('n', fp); break;
467 case '\r': fputc('\\', fp); fputc('r', fp); break;
468 case '\t': fputc('\\', fp); fputc('t', fp); break;
469 case '\v': fputc('\\', fp); fputc('v', fp); break;
470 case '`': fputc('\\', fp); fputc('`', fp); break;
471 case '\'': fputc('\\', fp); fputc('\'', fp); break;
472 case '\"': fputc('\\', fp); fputc('\"', fp); break;
485 /* --- @timestring@ --- *
487 * Arguments: @time_t t@ = a timestamp
488 * @dstr *d@ = a string to write on
492 * Use: Writes a textual representation of the timestamp to the
496 static void timestring(time_t t, dstr *d)
498 if (t == KEXP_FOREVER)
501 struct tm *tm = localtime(&t);
503 d->len += strftime(d->buf + d->len, 32, "%Y-%m-%d %H:%M:%S %Z", tm);
508 /* --- @breset@ --- *
510 * Arguments: @block *b@ = block to reset
514 * Use: Resets a block so that more stuff can be put in it.
517 static void breset(block *b)
528 * Arguments: @block *b@ = block to initialize
532 * Use: Initializes a block as something to read into.
535 static void binit(block *b)
542 /* --- @bdestroy@ --- *
544 * Arguments: @block *b@ = block to destroy
548 * Use: Destroys a block's contents.
551 static void bdestroy(block *b)
559 * Arguments: @block *b@ = pointer to block
560 * @FILE *fp@ = stream to read from
561 * @unsigned bin@ = binary switch
563 * Returns: Tag of block, or an error tag.
565 * Use: Reads a block from a stream.
568 static int bget(block *b, FILE *fp, unsigned bin)
572 /* --- Read the tag --- */
578 if (getstring(fp, &d, 0))
580 for (tag = 0; tagtab[tag]; tag++) {
581 if (strcmp(tagtab[tag], d.buf) == 0)
588 /* --- Decide what to do next --- */
594 /* --- Reading of strings --- */
600 if (getstring(fp, &b->d, bin))
604 /* --- Timestamps --- */
610 if (fread(buf, sizeof(buf), 1, fp) < 1)
612 b->t = ((time_t)(((LOAD32(buf + 0) << 16) << 16) & ~MASK32) |
613 (time_t)LOAD32(buf + 4));
615 if (getstring(fp, &b->d, 0))
617 if (strcmp(b->d.buf, "forever") == 0)
619 else if ((b->t = get_date(b->d.buf, 0)) == -1)
624 /* --- Key ids --- */
629 if (fread(buf, sizeof(buf), 1, fp) < 1)
633 if (getstring(fp, &b->d, 0))
635 b->k = strtoul(b->d.buf, 0, 16);
639 /* --- Reading of binary data --- */
646 if (fread(buf, sizeof(buf), 1, fp) < 1)
652 if (fread(b->b.buf + b->b.len, 1, sz, fp) < sz)
657 if (getstring(fp, &b->d, 0))
660 base64_decode(&b64, b->d.buf, b->d.len, &b->b);
661 base64_decode(&b64, 0, 0, &b->b);
664 if (tag == T_FILE && getstring(fp, &b->d, bin))
668 /* --- Anything else --- */
679 * Arguments: @block *b@ = pointer to block to emit
680 * @dstr *d@ = output buffer
684 * Use: Encodes a block in a binary format.
687 static void blob(block *b, dstr *d)
701 STORE32(d->buf + d->len, ((b->t & ~MASK32) >> 16) >> 16);
702 STORE32(d->buf + d->len + 4, b->t);
707 STORE32(d->buf + d->len, b->k);
713 STORE16(d->buf + d->len, b->b.len);
716 if (b->tag == T_FILE) {
724 /* --- @bwrite@ --- *
726 * Arguments: @block *b@ = pointer to block to write
727 * @FILE *fp@ = stream to write on
731 * Use: Writes a block on a stream in a textual format.
734 static void bwrite(block *b, FILE *fp)
736 fputs(tagtab[b->tag], fp);
743 putstring(fp, b->d.buf, 0);
748 timestring(b->t, &d);
749 putstring(fp, d.buf, 0);
753 fprintf(fp, "%08lx", (unsigned long)b->k);
761 base64_encode(&b64, b->b.buf, b->b.len, &d);
762 base64_encode(&b64, 0, 0, &d);
764 if (b->tag == T_FILE) {
766 putstring(fp, b->d.buf, 0);
775 * Arguments: @block *b@ = pointer to block to write
776 * @FILE *fp@ = file to write on
777 * @ghash *h@ = pointer to hash function
778 * @unsigned bin@ = binary/text flag
782 * Use: Spits out a block properly.
785 static void bemit(block *b, FILE *fp, ghash *h, unsigned bin)
787 if (h || (fp && bin)) {
791 h->ops->hash(h, d.buf, d.len);
793 fwrite(d.buf, d.len, 1, fp);
799 /*----- Static variables --------------------------------------------------*/
801 static const char *keyring = "keyring";
803 /*----- Other shared functions --------------------------------------------*/
805 /* --- @keyreport@ --- *
807 * Arguments: @const char *file@ = filename containing the error
808 * @int line@ = line number in file
809 * @const char *err@ = error text message
810 * @void *p@ = unimportant pointer
814 * Use: Reports errors during the opening of a key file.
817 static void keyreport(const char *file, int line, const char *err, void *p)
819 moan("error in keyring `%s' at line `%s': %s", file, line, err);
824 * Arguments: @const gchash *c@ = pointer to hash class
825 * @const char *file@ = file to hash
826 * @octet *b@ = pointer to output buffer
828 * Returns: Zero if it worked, or nonzero for a system error.
830 * Use: Hashes a file.
833 static int fhash(const gchash *c, const char *file, octet *b)
835 FILE *fp = fopen(file, "rb");
836 ghash *h = c->init();
843 while ((sz = fread(buf, 1, sizeof(buf), fp)) > 0)
844 h->ops->hash(h, buf, sz);
855 * Arguments: @FILE *fp@ = file to write on
856 * @const void *p@ = pointer to data to be written
857 * @size_t sz@ = size of the data to write
861 * Use: Emits a hex dump to a stream.
864 static void fhex(FILE *fp, const void *p, size_t sz)
870 fprintf(fp, "%02x", *q++);
878 /*----- Signature generation ----------------------------------------------*/
880 static int sign(int argc, char *argv[])
893 const sig *s = sigtab;
894 const gchash *gch = &rmd160;
896 time_t exp = KEXP_EXPIRE;
898 const char *ifile = 0;
899 const char *ofile = 0;
907 static struct option opts[] = {
908 { "null", 0, 0, '0' },
909 { "binary", 0, 0, 'b' },
910 { "verbose", 0, 0, 'v' },
911 { "quiet", 0, 0, 'q' },
912 { "algorithm", OPTF_ARGREQ, 0, 'a' },
913 { "hash", OPTF_ARGREQ, 0, 'h' },
914 { "comment", OPTF_ARGREQ, 0, 'c' },
915 { "file", OPTF_ARGREQ, 0, 'f' },
916 { "output", OPTF_ARGREQ, 0, 'o' },
917 { "keytype", OPTF_ARGREQ, 0, 't' },
918 { "keyid", OPTF_ARGREQ, 0, 'i' },
919 { "key", OPTF_ARGREQ, 0, 'i' },
920 { "expire", OPTF_ARGREQ, 0, 'e' },
923 int i = mdwopt(argc, argv, "+0vqb a:h:c: f:o: t:i:k:e:", opts, 0, 0, 0);
941 if ((s = getsig(optarg)) == 0) {
942 die(EXIT_FAILURE, "unknown or ambiguous signature algorithm `%s'",
947 if ((gch = gethash(optarg)) == 0) {
948 die(EXIT_FAILURE, "unknown or ambiguous hash function `%s'",
969 if (strcmp(optarg, "forever") == 0)
971 else if ((exp = get_date(optarg, 0)) == -1)
972 die(EXIT_FAILURE, "bad expiry time");
979 if (optind != argc || (f & f_bogus))
980 die(EXIT_FAILURE, "Usage: sign [-options]");
982 /* --- Locate the signing key --- */
984 if (key_open(&kf, keyring, KOPEN_WRITE, keyreport, 0))
985 die(EXIT_FAILURE, "couldn't open keyring `%s'", keyring);
987 if ((k = key_bytag(&kf, ki)) == 0)
988 die(EXIT_FAILURE, "couldn't find key `%s'", ki);
992 if ((k = key_bytype(&kf, kt)) == 0)
993 die(EXIT_FAILURE, "no appropriate key of type `%s'", kt);
996 if (exp == KEXP_FOREVER && k->exp != KEXP_FOREVER) {
997 die(EXIT_FAILURE, "key `%s' expires: can't create nonexpiring signature",
1001 /* --- Open files --- */
1005 else if ((ifp = fopen(ifile, (f & f_raw) ? "rb" : "r")) == 0) {
1006 die(EXIT_FAILURE, "couldn't open input file `%s': %s",
1007 ifile, strerror(errno));
1012 else if ((ofp = fopen(ofile, (f & f_bin) ? "wb" : "w")) == 0) {
1013 die(EXIT_FAILURE, "couldn't open output file `%s': %s",
1014 ofile, strerror(errno));
1017 /* --- Emit the start of the output --- */
1019 binit(&b); b.tag = T_IDENT;
1020 dstr_putf(&b.d, "%s, Catacomb version " VERSION, QUIS);
1021 bemit(&b, ofp, 0, f & f_bin);
1023 breset(&b); b.tag = T_SIGALG; DPUTS(&b.d, s->name);
1024 bemit(&b, ofp, 0, f & f_bin);
1026 breset(&b); b.tag = T_HASHALG; DPUTS(&b.d, gch->name);
1027 bemit(&b, ofp, 0, f & f_bin);
1029 breset(&b); b.tag = T_KEYID; b.k = k->id;
1030 bemit(&b, ofp, 0, f & f_bin);
1032 /* --- Start hashing, and emit the datestamps and things --- */
1035 time_t now = time(0);
1038 breset(&b); b.tag = T_DATE; b.t = now; bemit(&b, ofp, h, f & f_bin);
1039 if (exp == KEXP_EXPIRE)
1040 exp = now + 86400 * 28;
1041 breset(&b); b.tag = T_EXPIRE; b.t = exp; bemit(&b, ofp, h, f & f_bin);
1043 breset(&b); b.tag = T_COMMENT; DPUTS(&b.d, c);
1044 bemit(&b, ofp, h, f & f_bin);
1051 /* --- Now hash the various files --- */
1055 /* --- Stop on an output error --- */
1062 /* --- Read the next filename to hash --- */
1065 if (getstring(ifp, &b.d, f & f_raw))
1068 DENSURE(&b.b, h->ops->c->hashsz);
1069 if (fhash(gch, b.d.buf, b.b.buf)) {
1070 moan("Error reading `%s': %s", b.d.buf, strerror(errno));
1073 b.b.len += h->ops->c->hashsz;
1075 fhex(stderr, b.b.buf, b.b.len);
1076 fprintf(stderr, " %s\n", b.d.buf);
1078 bemit(&b, ofp, h, f & f_bin);
1082 /* --- Create the signature --- */
1084 if (!(f & f_bogus)) {
1086 b.tag = T_SIGNATURE;
1087 DENSURE(&b.d, h->ops->c->hashsz);
1088 h->ops->done(h, b.d.buf);
1089 if ((e = s->sign(k, b.d.buf, h->ops->c->hashsz, &b.b)) != 0) {
1090 moan("error creating signature: %s", key_strerror(e));
1093 if (!(f & f_bogus)) {
1094 bemit(&b, ofp, 0, f & f_bin);
1095 key_used(&kf, k, exp);
1099 /* --- Tidy up at the end --- */
1111 if ((e = key_close(&kf)) != 0) {
1114 die(EXIT_FAILURE, "couldn't write file `%s': %s",
1115 keyring, strerror(errno));
1117 die(EXIT_FAILURE, "keyring file `%s' broken: %s (repair manually)",
1118 keyring, strerror(errno));
1122 die(EXIT_FAILURE, "error(s) occurred while creating signature");
1123 return (EXIT_SUCCESS);
1126 /*----- Signature verification --------------------------------------------*/
1128 static int verify(int argc, char *argv[])
1141 const gchash *gch = &rmd160;
1148 /* --- Parse the options --- */
1151 static struct option opts[] = {
1152 { "verbose", 0, 0, 'v' },
1153 { "quiet", 0, 0, 'q' },
1156 int i = mdwopt(argc, argv, "+vq", opts, 0, 0, 0);
1174 if ((f & f_bogus) || argc > 1)
1175 die(EXIT_FAILURE, "Usage: verify [-qv] [file]");
1177 /* --- Open the key file, and start reading the input file --- */
1179 if (key_open(&kf, keyring, KOPEN_READ, keyreport, 0))
1180 die(EXIT_FAILURE, "couldn't open keyring `%s'\n", keyring);
1184 if ((fp = fopen(argv[0], "rb")) == 0) {
1185 die(EXIT_FAILURE, "couldn't open file `%s': %s\n",
1186 argv[0], strerror(errno));
1188 if (getc(fp) == 0) {
1193 if ((fp = fopen(argv[0], "r")) == 0) {
1194 die(EXIT_FAILURE, "couldn't open file `%s': %s\n",
1195 argv[0], strerror(errno));
1200 /* --- Read the introductory matter --- */
1205 e = bget(&b, fp, f & f_bin);
1207 die(EXIT_FAILURE, "error reading packet: %s\n", errtab[-e]);
1213 printf("INFO ident: `%s'\n", b.d.buf);
1216 if ((s = getsig(b.d.buf)) == 0) {
1218 printf("FAIL unknown signature algorithm `%s'\n", b.d.buf);
1222 printf("INFO signature algorithm: %s\n", s->name);
1225 if ((gch = gethash(b.d.buf)) == 0) {
1227 printf("FAIL unknown hash function `%s'\n", b.d.buf);
1231 printf("INFO hash function algorithm: %s\n", gch->name);
1234 if ((k = key_byid(&kf, b.k)) == 0) {
1236 printf("FAIL key %08lx not found\n", (unsigned long)b.k);
1241 key_fulltag(k, &b.d);
1242 printf("INFO key: %s\n", b.d.buf);
1246 die(EXIT_FAILURE, "(internal) unknown packet type\n");
1251 /* --- Initialize the hash function and start reading hashed packets --- */
1256 puts("FAIL no keyid packet found");
1263 printf("INFO comment: `%s'\n", b.d.buf);
1269 timestring(b.t, &b.d);
1270 printf("INFO date: %s\n", b.d.buf);
1275 time_t now = time(0);
1278 puts("BAD signature has expired");
1283 timestring(b.t, &b.d);
1284 printf("INFO expires: %s\n", b.d.buf);
1290 DENSURE(&d, gch->hashsz);
1291 if (fhash(gch, b.d.buf, d.buf)) {
1293 printf("BAD error reading file `%s': %s\n",
1294 b.d.buf, strerror(errno));
1297 } else if (b.b.len != gch->hashsz ||
1298 memcmp(d.buf, b.b.buf, b.b.len) != 0) {
1300 printf("BAD file `%s' has incorrect hash\n", b.d.buf);
1302 } else if (verb > 3) {
1303 fputs("INFO hash: ", stdout);
1304 fhex(stdout, b.b.buf, b.b.len);
1305 printf(" %s\n", b.d.buf);
1311 DENSURE(&b.d, h->ops->c->hashsz);
1312 b.d.len += h->ops->c->hashsz;
1313 h->ops->done(h, b.d.buf);
1314 e = s->verify(k, b.d.buf, b.d.len, b.b.buf, b.b.len);
1318 printf("BAD error unpacking key: %s\n", key_strerror(e));
1320 puts("BAD bad signature");
1323 } else if (verb > 2)
1324 puts("INFO good signature");
1328 printf("FAIL invalid packet type %i\n", e);
1333 e = bget(&b, fp, f & f_bin);
1336 printf("FAIL error reading packet: %s\n", errtab[-e]);
1348 puts("FAIL signature invalid");
1350 puts("OK signature verified");
1352 return (f & f_bogus ? EXIT_FAILURE : EXIT_SUCCESS);
1355 /*----- Main code ---------------------------------------------------------*/
1357 typedef struct cmd {
1359 int (*func)(int /*argc*/, char */*argv*/[]);
1363 static cmd cmdtab[] = {
1364 /* { "manifest", manifest, */
1365 /* "manifest [-0] [-o output]" }, */
1368 [-0v] [-a alg] [-h hash] [-t keytype] [-i keyid]\n\
1369 [-e expire] [-f file] [-o output]" },
1371 "verify [-qv] [file]" },
1375 static void version(FILE *fp)
1377 pquis(fp, "$, Catacomb version " VERSION "\n");
1380 static void usage(FILE *fp)
1382 pquis(fp, "Usage: $ [-k keyring] command [args]\n");
1385 static void help(FILE *fp)
1392 Create and verify signatures on lists of files.\n\
1394 for (c = cmdtab; c->name; c++)
1395 fprintf(fp, "%s\n", c->help);
1400 * Arguments: @int argc@ = number of command line arguments
1401 * @char *argv[]@ = vector of command line arguments
1403 * Returns: Zero if successful, nonzero otherwise.
1405 * Use: Signs or verifies signatures on lists of files. Useful for
1406 * ensuring that a distribution is unmolested.
1409 int main(int argc, char *argv[])
1412 cmd *c = 0, *cc = 0;
1419 /* --- Initialize the library --- */
1423 rand_noisesrc(RAND_GLOBAL, &noise_source);
1424 rand_seed(RAND_GLOBAL, 160);
1426 /* --- Parse options --- */
1429 static struct option opts[] = {
1430 { "help", 0, 0, 'h' },
1431 { "version", 0, 0, 'v' },
1432 { "usage", 0, 0, 'u' },
1433 { "keyring", OPTF_ARGREQ, 0, 'k' },
1436 int i = mdwopt(argc, argv, "+hvu k:", opts, 0, 0, 0);
1463 if (f & f_bogus || argc < 1) {
1468 /* --- Dispatch to the correct subcommand handler --- */
1470 n = strlen(argv[0]);
1471 for (c = cmdtab; c->name; c++) {
1472 if (strncmp(argv[0], c->name, n) == 0) {
1473 if (c->name[n] == 0) {
1477 die(EXIT_FAILURE, "ambiguous command name `%s'", argv[0]);
1483 die(EXIT_FAILURE, "unknown command `%s'", argv[0]);
1484 return (cc->func(argc, argv));
1487 /*----- That's all, folks -------------------------------------------------*/