3 * $Id: dsig.c,v 1.2 2000/07/01 11:27:22 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 1.2 2000/07/01 11:27:22 mdw
34 * Use new PKCS#1 padding functions rather than rolling by hand.
36 * Revision 1.1 2000/06/17 10:54:29 mdw
37 * Program to generate and verify signatures on multiple files.
41 /*----- Header files ------------------------------------------------------*/
51 #include <mLib/alloc.h>
52 #include <mLib/base64.h>
53 #include <mLib/mdwopt.h>
54 #include <mLib/quis.h>
55 #include <mLib/report.h>
71 /*----- Digital signature algorithm ---------------------------------------*/
73 static int dsasign(key *k, const void *m, size_t msz, dstr *d)
76 key_packstruct ks[DSA_PRIVFETCHSZ];
82 kp = key_fetchinit(dsa_privfetch, ks, &dp);
83 if ((e = key_fetch(kp, k)) != 0) {
87 sz = mp_octets(dp.dp.q);
90 rand_get(RAND_GLOBAL, p, sz);
91 dsa_sign(&dp.dp, dp.x, m, msz, p, sz, p, sz, p + sz, sz);
97 static int dsaverify(key *k, const void *m, size_t msz,
98 const void *s, size_t ssz)
101 key_packstruct ks[DSA_PUBFETCHSZ];
106 kp = key_fetchinit(dsa_pubfetch, ks, &dp);
107 if ((e = key_fetch(kp, k)) != 0) {
112 e = dsa_verify(&dp.dp, dp.y, m, msz, s, sz, s + sz, sz);
117 /*----- RSA signing -------------------------------------------------------*/
119 static int rsasign(key *k, const void *m, size_t msz, dstr *d)
123 pkcs1 pk = { 0, 0, 0 };
124 key_packstruct ks[RSA_PRIVFETCHSZ];
128 kp = key_fetchinit(rsa_privfetch, ks, &rp);
129 if ((e = key_fetch(kp, k)) != 0) {
133 rsa_privcreate(&rpc, &rp, &rand_global);
134 if (rsa_sign(&rpc, m, msz, d, pkcs1_sigencode, &pk) < 0)
135 die(EXIT_FAILURE, "internal error in rsasign (key too small?)");
136 rsa_privdestroy(&rpc);
141 static int rsaverify(key *k, const void *m, size_t msz,
142 const void *s, size_t ssz)
146 pkcs1 pk = { 0, 0, 0 };
147 key_packstruct ks[RSA_PUBFETCHSZ];
153 kp = key_fetchinit(rsa_pubfetch, ks, &rp);
154 if ((e = key_fetch(kp, k)) != 0) {
158 rsa_pubcreate(&rpc, &rp);
159 if (rsa_verify(&rpc, s, ssz, &d, pkcs1_sigdecode, &pk) > 0 &&
160 msz == d.len && memcmp(d.buf, m, msz) == 0)
163 rsa_pubdestroy(&rpc);
168 /*----- Algorithm choice --------------------------------------------------*/
173 int (*sign)(key */*k*/, const void */*m*/, size_t /*msz*/, dstr */*d*/);
174 int (*verify)(key */*k*/, const void */*m*/, size_t /*msz*/,
175 const void */*s*/, size_t /*ssz*/);
178 static const gchash *hashtab[] = { &rmd160, &sha, &md5, 0 };
179 static sig sigtab[] = {
180 { "dsa", "dsig-dsa", dsasign, dsaverify },
181 { "rsa", "dsig-rsa", rsasign, rsaverify },
185 /* --- @gethash@ --- *
187 * Arguments: @const char *name@ = pointer to name string
189 * Returns: Pointer to appropriate hash class.
191 * Use: Chooses a hash function by name.
194 static const gchash *gethash(const char *name)
196 const gchash **g, *gg = 0;
197 size_t sz = strlen(name);
198 for (g = hashtab; *g; g++) {
199 if (strncmp(name, (*g)->name, sz) == 0) {
200 if ((*g)->name[sz] == 0) {
212 /* --- @getsig@ --- *
214 * Arguments: @const char *name@ = pointer to name string
216 * Returns: Pointer to appropriate signature type.
218 * Use: Chooses a signature algorithm by name.
221 static sig *getsig(const char *name)
224 size_t sz = strlen(name);
225 for (s = sigtab; s->name; s++) {
226 if (strncmp(name, s->name, sz) == 0) {
227 if (s->name[sz] == 0) {
239 /*----- Data formatting ---------------------------------------------------*/
241 /* --- Binary data structure --- *
243 * The binary format, which is used for hashing and for the optional binary
244 * output, consists of a sequence of tagged blocks. The tag describes the
245 * format and meaining of the following data.
249 /* --- Block tags --- */
251 T_IDENT = 0, /* An identifying marker */
252 T_SIGALG, /* Signature algorithm used */
253 T_HASHALG, /* Hash algorithm used */
254 T_KEYID, /* Key identifier */
255 T_BEGIN, /* Begin hashing here */
256 T_COMMENT = T_BEGIN, /* A textual comment */
257 T_DATE, /* Creation date of signature */
258 T_EXPIRE, /* Expiry date of signature */
259 T_FILE, /* File and corresponding hash */
260 T_SIGNATURE, /* Final signature block */
262 /* --- Error messages --- */
270 /* --- Name translation table --- */
272 static const char *tagtab[] = {
273 "ident:", "sigalg:", "hashalg:", "keyid:",
274 "comment:", "date:", "expires:", "file:",
279 static const char *errtab[] = {
281 "Unexpected end-of-file",
282 "Binary object too large",
287 /* --- Memory representation of block types --- */
289 typedef struct block {
290 int tag; /* Type tag */
291 dstr d; /* String data */
292 dstr b; /* Binary data */
293 time_t t; /* Timestamp */
294 uint32 k; /* Keyid */
297 /* --- @getstring@ --- *
299 * Arguments: @FILE *fp@ = stream from which to read
300 * @dstr *d@ = destination string
301 * @unsigned raw@ = raw or cooked read
303 * Returns: Zero if OK, nonzero on end-of-file.
305 * Use: Reads a filename (or something similar) from a stream.
308 static int getstring(FILE *fp, dstr *d, unsigned raw)
313 /* --- Raw: just read exactly what's written up to a null byte --- */
316 if ((ch = getc(fp)) == EOF)
322 if ((ch = getc(fp)) == EOF)
329 /* --- Skip as far as whitespace --- *
331 * Also skip past comments.
336 while (isspace((unsigned char)ch))
339 do ch = getc(fp); while (ch != '\n' && ch != EOF);
345 /* --- If the character is a quote then read a quoted string --- */
357 /* --- Now read all sorts of interesting things --- */
361 /* --- Handle an escaped thing --- */
368 case 'a': ch = '\n'; break;
369 case 'b': ch = '\b'; break;
370 case 'f': ch = '\f'; break;
371 case 'n': ch = '\n'; break;
372 case 'r': ch = '\r'; break;
373 case 't': ch = '\t'; break;
374 case 'v': ch = '\v'; break;
380 /* --- If it's a quote or some other end marker then stop --- */
382 if (ch == q || (!q && isspace((unsigned char)ch)))
385 /* --- Otherwise contribute and continue --- */
388 if ((ch = getc(fp)) == EOF)
398 /* --- @putstring@ --- *
400 * Arguments: @FILE *fp@ = stream to write on
401 * @const char *p@ = pointer to text
402 * @unsigned raw@ = whether the string is to be written raw
406 * Use: Emits a string to a stream.
409 static void putstring(FILE *fp, const char *p, unsigned raw)
411 size_t sz = strlen(p);
415 /* --- Just write the string null terminated if raw --- */
418 fwrite(p, 1, sz + 1, fp);
422 /* --- Check for any dodgy characters --- */
425 for (q = p; *q; q++) {
426 if (isspace((unsigned char)*q)) {
435 /* --- Emit the string --- */
437 for (q = p; *q; q++) {
439 case '\a': fputc('\\', fp); fputc('a', fp); break;
440 case '\b': fputc('\\', fp); fputc('b', fp); break;
441 case '\f': fputc('\\', fp); fputc('f', fp); break;
442 case '\n': fputc('\\', fp); fputc('n', fp); break;
443 case '\r': fputc('\\', fp); fputc('r', fp); break;
444 case '\t': fputc('\\', fp); fputc('t', fp); break;
445 case '\v': fputc('\\', fp); fputc('v', fp); break;
446 case '`': fputc('\\', fp); fputc('`', fp); break;
447 case '\'': fputc('\\', fp); fputc('\'', fp); break;
448 case '\"': fputc('\\', fp); fputc('\"', fp); break;
461 /* --- @timestring@ --- *
463 * Arguments: @time_t t@ = a timestamp
464 * @dstr *d@ = a string to write on
468 * Use: Writes a textual representation of the timestamp to the
472 static void timestring(time_t t, dstr *d)
474 if (t == KEXP_FOREVER)
477 struct tm *tm = localtime(&t);
479 d->len += strftime(d->buf + d->len, 32, "%Y-%m-%d %H:%M:%S %Z", tm);
484 /* --- @breset@ --- *
486 * Arguments: @block *b@ = block to reset
490 * Use: Resets a block so that more stuff can be put in it.
493 static void breset(block *b)
504 * Arguments: @block *b@ = block to initialize
508 * Use: Initializes a block as something to read into.
511 static void binit(block *b)
518 /* --- @bdestroy@ --- *
520 * Arguments: @block *b@ = block to destroy
524 * Use: Destroys a block's contents.
527 static void bdestroy(block *b)
535 * Arguments: @block *b@ = pointer to block
536 * @FILE *fp@ = stream to read from
537 * @unsigned bin@ = binary switch
539 * Returns: Tag of block, or an error tag.
541 * Use: Reads a block from a stream.
544 static int bget(block *b, FILE *fp, unsigned bin)
548 /* --- Read the tag --- */
554 if (getstring(fp, &d, 0))
556 for (tag = 0; tagtab[tag]; tag++) {
557 if (strcmp(tagtab[tag], d.buf) == 0)
564 /* --- Decide what to do next --- */
570 /* --- Reading of strings --- */
576 if (getstring(fp, &b->d, bin))
580 /* --- Timestamps --- */
586 if (fread(buf, sizeof(buf), 1, fp) < 1)
588 b->t = ((time_t)(((LOAD32(buf + 0) << 16) << 16) & ~MASK32) |
589 (time_t)LOAD32(buf + 4));
591 if (getstring(fp, &b->d, 0))
593 if (strcmp(b->d.buf, "forever") == 0)
595 else if ((b->t = get_date(b->d.buf, 0)) == -1)
600 /* --- Key ids --- */
605 if (fread(buf, sizeof(buf), 1, fp) < 1)
609 if (getstring(fp, &b->d, 0))
611 b->k = strtoul(b->d.buf, 0, 16);
615 /* --- Reading of binary data --- */
622 if (fread(buf, sizeof(buf), 1, fp) < 1)
628 if (fread(b->b.buf + b->b.len, 1, sz, fp) < sz)
633 if (getstring(fp, &b->d, 0))
636 base64_decode(&b64, b->d.buf, b->d.len, &b->b);
637 base64_decode(&b64, 0, 0, &b->b);
640 if (tag == T_FILE && getstring(fp, &b->d, bin))
644 /* --- Anything else --- */
655 * Arguments: @block *b@ = pointer to block to emit
656 * @dstr *d@ = output buffer
660 * Use: Encodes a block in a binary format.
663 static void blob(block *b, dstr *d)
677 STORE32(d->buf + d->len, ((b->t & ~MASK32) >> 16) >> 16);
678 STORE32(d->buf + d->len + 4, b->t);
683 STORE32(d->buf + d->len, b->k);
689 STORE16(d->buf + d->len, b->b.len);
692 if (b->tag == T_FILE) {
700 /* --- @bwrite@ --- *
702 * Arguments: @block *b@ = pointer to block to write
703 * @FILE *fp@ = stream to write on
707 * Use: Writes a block on a stream in a textual format.
710 static void bwrite(block *b, FILE *fp)
712 fputs(tagtab[b->tag], fp);
719 putstring(fp, b->d.buf, 0);
724 timestring(b->t, &d);
725 putstring(fp, d.buf, 0);
729 fprintf(fp, "%08lx", (unsigned long)b->k);
737 base64_encode(&b64, b->b.buf, b->b.len, &d);
738 base64_encode(&b64, 0, 0, &d);
740 if (b->tag == T_FILE) {
742 putstring(fp, b->d.buf, 0);
751 * Arguments: @block *b@ = pointer to block to write
752 * @FILE *fp@ = file to write on
753 * @ghash *h@ = pointer to hash function
754 * @unsigned bin@ = binary/text flag
758 * Use: Spits out a block properly.
761 static void bemit(block *b, FILE *fp, ghash *h, unsigned bin)
763 if (h || (fp && bin)) {
767 h->ops->hash(h, d.buf, d.len);
769 fwrite(d.buf, d.len, 1, fp);
775 /*----- Static variables --------------------------------------------------*/
777 static const char *keyring = "keyring";
779 /*----- Other shared functions --------------------------------------------*/
781 /* --- @keyreport@ --- *
783 * Arguments: @const char *file@ = filename containing the error
784 * @int line@ = line number in file
785 * @const char *err@ = error text message
786 * @void *p@ = unimportant pointer
790 * Use: Reports errors during the opening of a key file.
793 static void keyreport(const char *file, int line, const char *err, void *p)
795 moan("error in keyring `%s' at line `%s': %s", file, line, err);
800 * Arguments: @const gchash *c@ = pointer to hash class
801 * @const char *file@ = file to hash
802 * @octet *b@ = pointer to output buffer
804 * Returns: Zero if it worked, or nonzero for a system error.
806 * Use: Hashes a file.
809 static int fhash(const gchash *c, const char *file, octet *b)
811 FILE *fp = fopen(file, "rb");
812 ghash *h = c->init();
819 while ((sz = fread(buf, 1, sizeof(buf), fp)) > 0)
820 h->ops->hash(h, buf, sz);
831 * Arguments: @FILE *fp@ = file to write on
832 * @const void *p@ = pointer to data to be written
833 * @size_t sz@ = size of the data to write
837 * Use: Emits a hex dump to a stream.
840 static void fhex(FILE *fp, const void *p, size_t sz)
846 fprintf(fp, "%02x", *q++);
854 /*----- Signature generation ----------------------------------------------*/
856 static int sign(int argc, char *argv[])
869 const sig *s = sigtab;
870 const gchash *gch = &rmd160;
872 time_t exp = KEXP_EXPIRE;
874 const char *ifile = 0;
875 const char *ofile = 0;
883 static struct option opts[] = {
884 { "null", 0, 0, '0' },
885 { "binary", 0, 0, 'b' },
886 { "verbose", 0, 0, 'v' },
887 { "quiet", 0, 0, 'q' },
888 { "algorithm", OPTF_ARGREQ, 0, 'a' },
889 { "hash", OPTF_ARGREQ, 0, 'h' },
890 { "comment", OPTF_ARGREQ, 0, 'c' },
891 { "file", OPTF_ARGREQ, 0, 'f' },
892 { "output", OPTF_ARGREQ, 0, 'o' },
893 { "keytype", OPTF_ARGREQ, 0, 't' },
894 { "keyid", OPTF_ARGREQ, 0, 'i' },
895 { "key", OPTF_ARGREQ, 0, 'i' },
896 { "expire", OPTF_ARGREQ, 0, 'e' },
899 int i = mdwopt(argc, argv, "+0vqb a:h:c: f:o: t:i:k:e:", opts, 0, 0, 0);
917 if ((s = getsig(optarg)) == 0) {
918 die(EXIT_FAILURE, "unknown or ambiguous signature algorithm `%s'",
923 if ((gch = gethash(optarg)) == 0) {
924 die(EXIT_FAILURE, "unknown or ambiguous hash function `%s'",
945 if (strcmp(optarg, "forever") == 0)
947 else if ((exp = get_date(optarg, 0)) == -1)
948 die(EXIT_FAILURE, "bad expiry time");
955 if (optind != argc || (f & f_bogus))
956 die(EXIT_FAILURE, "Usage: sign [-options]");
958 /* --- Locate the signing key --- */
960 if (key_open(&kf, keyring, KOPEN_WRITE, keyreport, 0))
961 die(EXIT_FAILURE, "couldn't open keyring `%s'", keyring);
963 if ((k = key_bytag(&kf, ki)) == 0)
964 die(EXIT_FAILURE, "couldn't find key `%s'", ki);
968 if ((k = key_bytype(&kf, kt)) == 0)
969 die(EXIT_FAILURE, "no appropriate key of type `%s'", kt);
972 if (exp == KEXP_FOREVER && k->exp != KEXP_FOREVER) {
973 die(EXIT_FAILURE, "key `%s' expires: can't create nonexpiring signature",
977 /* --- Open files --- */
981 else if ((ifp = fopen(ifile, (f & f_raw) ? "rb" : "r")) == 0) {
982 die(EXIT_FAILURE, "couldn't open input file `%s': %s",
983 ifile, strerror(errno));
988 else if ((ofp = fopen(ofile, (f & f_bin) ? "wb" : "w")) == 0) {
989 die(EXIT_FAILURE, "couldn't open output file `%s': %s",
990 ofile, strerror(errno));
993 /* --- Emit the start of the output --- */
995 binit(&b); b.tag = T_IDENT;
996 dstr_putf(&b.d, "%s, Catacomb version " VERSION, QUIS);
997 bemit(&b, ofp, 0, f & f_bin);
999 breset(&b); b.tag = T_SIGALG; DPUTS(&b.d, s->name);
1000 bemit(&b, ofp, 0, f & f_bin);
1002 breset(&b); b.tag = T_HASHALG; DPUTS(&b.d, gch->name);
1003 bemit(&b, ofp, 0, f & f_bin);
1005 breset(&b); b.tag = T_KEYID; b.k = k->id;
1006 bemit(&b, ofp, 0, f & f_bin);
1008 /* --- Start hashing, and emit the datestamps and things --- */
1011 time_t now = time(0);
1014 breset(&b); b.tag = T_DATE; b.t = now; bemit(&b, ofp, h, f & f_bin);
1015 if (exp == KEXP_EXPIRE)
1016 exp = now + 86400 * 28;
1017 breset(&b); b.tag = T_EXPIRE; b.t = exp; bemit(&b, ofp, h, f & f_bin);
1019 breset(&b); b.tag = T_COMMENT; DPUTS(&b.d, c);
1020 bemit(&b, ofp, h, f & f_bin);
1027 /* --- Now hash the various files --- */
1031 /* --- Stop on an output error --- */
1038 /* --- Read the next filename to hash --- */
1041 if (getstring(ifp, &b.d, f & f_raw))
1044 DENSURE(&b.b, h->ops->c->hashsz);
1045 if (fhash(gch, b.d.buf, b.b.buf)) {
1046 moan("Error reading `%s': %s", b.d.buf, strerror(errno));
1049 b.b.len += h->ops->c->hashsz;
1051 fhex(stderr, b.b.buf, b.b.len);
1052 fprintf(stderr, " %s\n", b.d.buf);
1054 bemit(&b, ofp, h, f & f_bin);
1058 /* --- Create the signature --- */
1060 if (!(f & f_bogus)) {
1062 b.tag = T_SIGNATURE;
1063 DENSURE(&b.d, h->ops->c->hashsz);
1064 h->ops->done(h, b.d.buf);
1065 if ((e = s->sign(k, b.d.buf, h->ops->c->hashsz, &b.b)) != 0) {
1066 moan("error creating signature: %s", key_strerror(e));
1069 if (!(f & f_bogus)) {
1070 bemit(&b, ofp, 0, f & f_bin);
1071 key_used(&kf, k, exp);
1075 /* --- Tidy up at the end --- */
1087 if ((e = key_close(&kf)) != 0) {
1090 die(EXIT_FAILURE, "couldn't write file `%s': %s",
1091 keyring, strerror(errno));
1093 die(EXIT_FAILURE, "keyring file `%s' broken: %s (repair manually)",
1094 keyring, strerror(errno));
1098 die(EXIT_FAILURE, "error(s) occurred while creating signature");
1099 return (EXIT_SUCCESS);
1102 /*----- Signature verification --------------------------------------------*/
1104 static int verify(int argc, char *argv[])
1117 const gchash *gch = &rmd160;
1124 /* --- Parse the options --- */
1127 static struct option opts[] = {
1128 { "verbose", 0, 0, 'v' },
1129 { "quiet", 0, 0, 'q' },
1132 int i = mdwopt(argc, argv, "+vq", opts, 0, 0, 0);
1150 if ((f & f_bogus) || argc > 1)
1151 die(EXIT_FAILURE, "Usage: verify [-qv] [file]");
1153 /* --- Open the key file, and start reading the input file --- */
1155 if (key_open(&kf, keyring, KOPEN_READ, keyreport, 0))
1156 die(EXIT_FAILURE, "couldn't open keyring `%s'\n", keyring);
1160 if ((fp = fopen(argv[0], "rb")) == 0) {
1161 die(EXIT_FAILURE, "couldn't open file `%s': %s\n",
1162 argv[0], strerror(errno));
1164 if (getc(fp) == 0) {
1169 if ((fp = fopen(argv[0], "r")) == 0) {
1170 die(EXIT_FAILURE, "couldn't open file `%s': %s\n",
1171 argv[0], strerror(errno));
1176 /* --- Read the introductory matter --- */
1181 e = bget(&b, fp, f & f_bin);
1183 die(EXIT_FAILURE, "error reading packet: %s\n", errtab[-e]);
1189 printf("INFO ident: `%s'\n", b.d.buf);
1192 if ((s = getsig(b.d.buf)) == 0) {
1194 printf("FAIL unknown signature algorithm `%s'\n", b.d.buf);
1198 printf("INFO signature algorithm: %s\n", s->name);
1201 if ((gch = gethash(b.d.buf)) == 0) {
1203 printf("FAIL unknown hash function `%s'\n", b.d.buf);
1207 printf("INFO hash function algorithm: %s\n", gch->name);
1210 if ((k = key_byid(&kf, b.k)) == 0) {
1212 printf("FAIL key %08lx not found\n", (unsigned long)b.k);
1217 key_fulltag(k, &b.d);
1218 printf("INFO key: %s\n", b.d.buf);
1222 die(EXIT_FAILURE, "(internal) unknown packet type\n");
1227 /* --- Initialize the hash function and start reading hashed packets --- */
1232 puts("FAIL no keyid packet found");
1239 printf("INFO comment: `%s'\n", b.d.buf);
1245 timestring(b.t, &b.d);
1246 printf("INFO date: %s\n", b.d.buf);
1251 time_t now = time(0);
1254 puts("BAD signature has expired");
1259 timestring(b.t, &b.d);
1260 printf("INFO expires: %s\n", b.d.buf);
1266 DENSURE(&d, gch->hashsz);
1267 if (fhash(gch, b.d.buf, d.buf)) {
1269 printf("BAD error reading file `%s': %s\n",
1270 b.d.buf, strerror(errno));
1273 } else if (b.b.len != gch->hashsz ||
1274 memcmp(d.buf, b.b.buf, b.b.len) != 0) {
1276 printf("BAD file `%s' has incorrect hash\n", b.d.buf);
1278 } else if (verb > 3) {
1279 fputs("INFO hash: ", stdout);
1280 fhex(stdout, b.b.buf, b.b.len);
1281 printf(" %s\n", b.d.buf);
1287 DENSURE(&b.d, h->ops->c->hashsz);
1288 b.d.len += h->ops->c->hashsz;
1289 h->ops->done(h, b.d.buf);
1290 e = s->verify(k, b.d.buf, b.d.len, b.b.buf, b.b.len);
1294 printf("BAD error unpacking key: %s\n", key_strerror(e));
1296 puts("BAD bad signature");
1299 } else if (verb > 2)
1300 puts("INFO good signature");
1304 printf("FAIL invalid packet type %i\n", e);
1309 e = bget(&b, fp, f & f_bin);
1312 printf("FAIL error reading packet: %s\n", errtab[-e]);
1324 puts("FAIL signature invalid");
1326 puts("OK signature verified");
1328 return (f & f_bogus ? EXIT_FAILURE : EXIT_SUCCESS);
1331 /*----- Main code ---------------------------------------------------------*/
1333 typedef struct cmd {
1335 int (*func)(int /*argc*/, char */*argv*/[]);
1339 static cmd cmdtab[] = {
1340 /* { "manifest", manifest, */
1341 /* "manifest [-0] [-o output]" }, */
1344 [-0v] [-a alg] [-h hash] [-t keytype] [-i keyid]\n\
1345 [-e expire] [-f file] [-o output]" },
1347 "verify [-qv] [file]" },
1351 static void version(FILE *fp)
1353 pquis(fp, "$, Catacomb version " VERSION "\n");
1356 static void usage(FILE *fp)
1358 pquis(fp, "Usage: $ [-k keyring] command [args]\n");
1361 static void help(FILE *fp)
1368 Create and verify signatures on lists of files.\n\
1370 for (c = cmdtab; c->name; c++)
1371 fprintf(fp, "%s\n", c->help);
1376 * Arguments: @int argc@ = number of command line arguments
1377 * @char *argv[]@ = vector of command line arguments
1379 * Returns: Zero if successful, nonzero otherwise.
1381 * Use: Signs or verifies signatures on lists of files. Useful for
1382 * ensuring that a distribution is unmolested.
1385 int main(int argc, char *argv[])
1388 cmd *c = 0, *cc = 0;
1395 /* --- Initialize the library --- */
1399 rand_noisesrc(RAND_GLOBAL, &noise_source);
1400 rand_seed(RAND_GLOBAL, 160);
1402 /* --- Parse options --- */
1405 static struct option opts[] = {
1406 { "help", 0, 0, 'h' },
1407 { "version", 0, 0, 'v' },
1408 { "usage", 0, 0, 'u' },
1409 { "keyring", OPTF_ARGREQ, 0, 'k' },
1412 int i = mdwopt(argc, argv, "+hvu k:", opts, 0, 0, 0);
1439 if (f & f_bogus || argc < 1) {
1444 /* --- Dispatch to the correct subcommand handler --- */
1446 n = strlen(argv[0]);
1447 for (c = cmdtab; c->name; c++) {
1448 if (strncmp(argv[0], c->name, n) == 0) {
1449 if (c->name[n] == 0) {
1453 die(EXIT_FAILURE, "ambiguous command name `%s'", argv[0]);
1459 die(EXIT_FAILURE, "unknown command `%s'", argv[0]);
1460 return (cc->func(argc, argv));
1463 /*----- That's all, folks -------------------------------------------------*/