Annotation of src/usr.bin/signify/signify.c, Revision 1.67
1.67 ! tedu 1: /* $OpenBSD: signify.c,v 1.66 2014/03/17 03:33:57 tedu Exp $ */
1.1 tedu 2: /*
3: * Copyright (c) 2013 Ted Unangst <tedu@openbsd.org>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16: */
17: #include <sys/stat.h>
18:
19: #include <netinet/in.h>
20: #include <resolv.h>
21:
22: #include <stdint.h>
23: #include <fcntl.h>
24: #include <string.h>
25: #include <stdio.h>
1.34 tedu 26: #include <stdlib.h>
1.1 tedu 27: #include <err.h>
28: #include <unistd.h>
29: #include <readpassphrase.h>
30: #include <util.h>
31: #include <sha2.h>
32:
33: #include "crypto_api.h"
34:
35: #define SIGBYTES crypto_sign_ed25519_BYTES
36: #define SECRETBYTES crypto_sign_ed25519_SECRETKEYBYTES
37: #define PUBLICBYTES crypto_sign_ed25519_PUBLICKEYBYTES
38:
39: #define PKALG "Ed"
40: #define KDFALG "BK"
1.13 tedu 41: #define FPLEN 8
42:
1.18 tedu 43: #define COMMENTHDR "untrusted comment: "
44: #define COMMENTHDRLEN 19
45: #define COMMENTMAXLEN 1024
1.51 tedu 46: #define VERIFYWITH "verify with "
1.1 tedu 47:
48: struct enckey {
49: uint8_t pkalg[2];
50: uint8_t kdfalg[2];
51: uint32_t kdfrounds;
52: uint8_t salt[16];
53: uint8_t checksum[8];
1.13 tedu 54: uint8_t fingerprint[FPLEN];
1.1 tedu 55: uint8_t seckey[SECRETBYTES];
56: };
57:
58: struct pubkey {
59: uint8_t pkalg[2];
1.13 tedu 60: uint8_t fingerprint[FPLEN];
1.1 tedu 61: uint8_t pubkey[PUBLICBYTES];
62: };
63:
64: struct sig {
65: uint8_t pkalg[2];
1.13 tedu 66: uint8_t fingerprint[FPLEN];
1.1 tedu 67: uint8_t sig[SIGBYTES];
68: };
69:
70: extern char *__progname;
71:
72: static void
1.31 tedu 73: usage(const char *error)
1.1 tedu 74: {
1.31 tedu 75: if (error)
76: fprintf(stderr, "%s\n", error);
1.9 espie 77: fprintf(stderr, "usage:"
1.15 espie 78: #ifndef VERIFYONLY
1.47 naddy 79: "\t%1$s -C [-q] -p pubkey -x sigfile [file ...]\n"
1.31 tedu 80: "\t%1$s -G [-n] [-c comment] -p pubkey -s seckey\n"
81: "\t%1$s -I [-p pubkey] [-s seckey] [-x sigfile]\n"
82: "\t%1$s -S [-e] [-x sigfile] -s seckey -m message\n"
1.15 espie 83: #endif
1.42 tedu 84: "\t%1$s -V [-eq] [-x sigfile] -p pubkey -m message\n",
1.15 espie 85: __progname);
1.1 tedu 86: exit(1);
87: }
88:
89: static int
1.61 deraadt 90: xopen(const char *fname, int oflags, mode_t mode)
1.1 tedu 91: {
1.53 tedu 92: struct stat sb;
1.1 tedu 93: int fd;
94:
1.31 tedu 95: if (strcmp(fname, "-") == 0) {
1.61 deraadt 96: if ((oflags & O_WRONLY))
1.31 tedu 97: fd = dup(STDOUT_FILENO);
98: else
99: fd = dup(STDIN_FILENO);
100: if (fd == -1)
101: err(1, "dup failed");
102: } else {
1.61 deraadt 103: fd = open(fname, oflags, mode);
1.31 tedu 104: if (fd == -1)
105: err(1, "can't open %s for %s", fname,
1.61 deraadt 106: (oflags & O_WRONLY) ? "writing" : "reading");
1.31 tedu 107: }
1.53 tedu 108: if (fstat(fd, &sb) == -1 || S_ISDIR(sb.st_mode))
1.66 tedu 109: errx(1, "not a valid file: %s", fname);
1.1 tedu 110: return fd;
111: }
112:
113: static void *
114: xmalloc(size_t len)
115: {
116: void *p;
117:
118: p = malloc(len);
119: if (!p)
120: err(1, "malloc %zu", len);
121: return p;
122: }
123:
1.16 tedu 124: static size_t
1.46 tedu 125: parseb64file(const char *filename, char *b64, void *buf, size_t buflen,
1.18 tedu 126: char *comment)
1.16 tedu 127: {
128: int rv;
129: char *commentend, *b64end;
130:
131: commentend = strchr(b64, '\n');
132: if (!commentend || commentend - b64 <= COMMENTHDRLEN ||
1.65 tedu 133: memcmp(b64, COMMENTHDR, COMMENTHDRLEN) != 0)
1.16 tedu 134: errx(1, "invalid comment in %s; must start with '%s'",
135: filename, COMMENTHDR);
1.18 tedu 136: *commentend = 0;
1.40 deraadt 137: if (comment) {
138: if (strlcpy(comment, b64 + COMMENTHDRLEN,
139: COMMENTMAXLEN) >= COMMENTMAXLEN)
140: err(1, "comment too long");
141: }
1.16 tedu 142: b64end = strchr(commentend + 1, '\n');
143: if (!b64end)
144: errx(1, "missing new line after b64 in %s", filename);
145: *b64end = 0;
1.46 tedu 146: rv = b64_pton(commentend + 1, buf, buflen);
147: if (rv != buflen)
1.16 tedu 148: errx(1, "invalid b64 encoding in %s", filename);
1.65 tedu 149: if (memcmp(buf, PKALG, 2) != 0)
1.16 tedu 150: errx(1, "unsupported file %s", filename);
151: return b64end - b64 + 1;
152: }
153:
1.1 tedu 154: static void
1.46 tedu 155: readb64file(const char *filename, void *buf, size_t buflen, char *comment)
1.1 tedu 156: {
157: char b64[2048];
1.10 tedu 158: int rv, fd;
1.1 tedu 159:
160: fd = xopen(filename, O_RDONLY | O_NOFOLLOW, 0);
161: memset(b64, 0, sizeof(b64));
162: rv = read(fd, b64, sizeof(b64) - 1);
163: if (rv == -1)
1.7 espie 164: err(1, "read from %s", filename);
1.46 tedu 165: parseb64file(filename, b64, buf, buflen, comment);
1.41 tedu 166: explicit_bzero(b64, sizeof(b64));
1.1 tedu 167: close(fd);
168: }
169:
1.35 tedu 170: static uint8_t *
1.1 tedu 171: readmsg(const char *filename, unsigned long long *msglenp)
172: {
1.49 tedu 173: unsigned long long msglen = 0;
174: uint8_t *msg = NULL;
1.1 tedu 175: struct stat sb;
1.49 tedu 176: ssize_t x, space;
1.1 tedu 177: int fd;
178:
179: fd = xopen(filename, O_RDONLY | O_NOFOLLOW, 0);
1.49 tedu 180: if (fstat(fd, &sb) == 0 && S_ISREG(sb.st_mode)) {
181: if (sb.st_size > (1UL << 30))
182: errx(1, "msg too large in %s", filename);
183: space = sb.st_size + 1;
184: } else {
1.67 ! tedu 185: space = 64 * 1024;
1.49 tedu 186: }
187:
1.67 ! tedu 188: msg = xmalloc(space + 1);
1.49 tedu 189: while (1) {
190: if (space == 0) {
1.67 ! tedu 191: if (msglen * 2 > (1UL << 30))
! 192: errx(1, "msg too large in %s", filename);
! 193: space = msglen;
1.49 tedu 194: if (!(msg = realloc(msg, msglen + space + 1)))
195: errx(1, "realloc");
196: }
197: if ((x = read(fd, msg + msglen, space)) == -1)
198: err(1, "read from %s", filename);
199: if (x == 0)
200: break;
201: space -= x;
202: msglen += x;
203: }
204:
1.45 tedu 205: msg[msglen] = 0;
1.1 tedu 206: close(fd);
207:
208: *msglenp = msglen;
209: return msg;
210: }
211:
212: static void
1.46 tedu 213: writeall(int fd, const void *buf, size_t buflen, const char *filename)
1.1 tedu 214: {
1.11 tedu 215: ssize_t x;
1.38 espie 216:
1.46 tedu 217: while (buflen != 0) {
218: x = write(fd, buf, buflen);
1.38 espie 219: if (x == -1)
220: err(1, "write to %s", filename);
1.46 tedu 221: buflen -= x;
1.61 deraadt 222: buf = (char *)buf + x;
1.7 espie 223: }
1.1 tedu 224: }
225:
1.17 deraadt 226: #ifndef VERIFYONLY
1.1 tedu 227: static void
228: writeb64file(const char *filename, const char *comment, const void *buf,
1.61 deraadt 229: size_t buflen, const void *msg, size_t msglen, int oflags, mode_t mode)
1.1 tedu 230: {
231: char header[1024];
232: char b64[1024];
233: int fd, rv;
234:
1.61 deraadt 235: fd = xopen(filename, O_CREAT|oflags|O_NOFOLLOW|O_WRONLY, mode);
1.40 deraadt 236: if (snprintf(header, sizeof(header), "%s%s\n",
237: COMMENTHDR, comment) >= sizeof(header))
238: err(1, "comment too long");
1.7 espie 239: writeall(fd, header, strlen(header), filename);
1.46 tedu 240: if ((rv = b64_ntop(buf, buflen, b64, sizeof(b64)-1)) == -1)
1.1 tedu 241: errx(1, "b64 encode failed");
1.8 espie 242: b64[rv++] = '\n';
1.7 espie 243: writeall(fd, b64, rv, filename);
1.41 tedu 244: explicit_bzero(b64, sizeof(b64));
1.58 tedu 245: if (msg)
246: writeall(fd, msg, msglen, filename);
1.1 tedu 247: close(fd);
248: }
249:
250: static void
1.50 tedu 251: kdf(uint8_t *salt, size_t saltlen, int rounds, int allowstdin,
252: uint8_t *key, size_t keylen)
1.1 tedu 253: {
254: char pass[1024];
1.48 tedu 255: int rppflags = RPP_ECHO_OFF;
1.1 tedu 256:
257: if (rounds == 0) {
258: memset(key, 0, keylen);
259: return;
260: }
261:
1.50 tedu 262: if (allowstdin && !isatty(STDIN_FILENO))
1.48 tedu 263: rppflags |= RPP_STDIN;
264: if (!readpassphrase("passphrase: ", pass, sizeof(pass), rppflags))
1.39 tedu 265: errx(1, "unable to read passphrase");
1.37 tedu 266: if (strlen(pass) == 0)
267: errx(1, "please provide a password");
1.1 tedu 268: if (bcrypt_pbkdf(pass, strlen(pass), salt, saltlen, key,
269: keylen, rounds) == -1)
270: errx(1, "bcrypt pbkdf");
1.41 tedu 271: explicit_bzero(pass, sizeof(pass));
1.1 tedu 272: }
273:
274: static void
275: signmsg(uint8_t *seckey, uint8_t *msg, unsigned long long msglen,
276: uint8_t *sig)
277: {
278: unsigned long long siglen;
279: uint8_t *sigbuf;
280:
281: sigbuf = xmalloc(msglen + SIGBYTES);
282: crypto_sign_ed25519(sigbuf, &siglen, msg, msglen, seckey);
283: memcpy(sig, sigbuf, SIGBYTES);
284: free(sigbuf);
285: }
286:
287: static void
1.27 tedu 288: generate(const char *pubkeyfile, const char *seckeyfile, int rounds,
289: const char *comment)
1.1 tedu 290: {
291: uint8_t digest[SHA512_DIGEST_LENGTH];
292: struct pubkey pubkey;
293: struct enckey enckey;
294: uint8_t xorkey[sizeof(enckey.seckey)];
1.13 tedu 295: uint8_t fingerprint[FPLEN];
1.27 tedu 296: char commentbuf[COMMENTMAXLEN];
1.1 tedu 297: SHA2_CTX ctx;
298: int i;
299:
300: crypto_sign_ed25519_keypair(pubkey.pubkey, enckey.seckey);
1.13 tedu 301: arc4random_buf(fingerprint, sizeof(fingerprint));
1.1 tedu 302:
303: SHA512Init(&ctx);
304: SHA512Update(&ctx, enckey.seckey, sizeof(enckey.seckey));
305: SHA512Final(digest, &ctx);
306:
307: memcpy(enckey.pkalg, PKALG, 2);
308: memcpy(enckey.kdfalg, KDFALG, 2);
309: enckey.kdfrounds = htonl(rounds);
1.13 tedu 310: memcpy(enckey.fingerprint, fingerprint, FPLEN);
1.1 tedu 311: arc4random_buf(enckey.salt, sizeof(enckey.salt));
1.50 tedu 312: kdf(enckey.salt, sizeof(enckey.salt), rounds, 1, xorkey, sizeof(xorkey));
1.1 tedu 313: memcpy(enckey.checksum, digest, sizeof(enckey.checksum));
314: for (i = 0; i < sizeof(enckey.seckey); i++)
315: enckey.seckey[i] ^= xorkey[i];
1.41 tedu 316: explicit_bzero(digest, sizeof(digest));
317: explicit_bzero(xorkey, sizeof(xorkey));
1.1 tedu 318:
1.40 deraadt 319: if (snprintf(commentbuf, sizeof(commentbuf), "%s secret key",
320: comment) >= sizeof(commentbuf))
321: err(1, "comment too long");
1.27 tedu 322: writeb64file(seckeyfile, commentbuf, &enckey,
1.58 tedu 323: sizeof(enckey), NULL, 0, O_EXCL, 0600);
1.41 tedu 324: explicit_bzero(&enckey, sizeof(enckey));
1.1 tedu 325:
326: memcpy(pubkey.pkalg, PKALG, 2);
1.13 tedu 327: memcpy(pubkey.fingerprint, fingerprint, FPLEN);
1.40 deraadt 328: if (snprintf(commentbuf, sizeof(commentbuf), "%s public key",
329: comment) >= sizeof(commentbuf))
330: err(1, "comment too long");
1.27 tedu 331: writeb64file(pubkeyfile, commentbuf, &pubkey,
1.58 tedu 332: sizeof(pubkey), NULL, 0, O_EXCL, 0666);
1.1 tedu 333: }
334:
335: static void
1.16 tedu 336: sign(const char *seckeyfile, const char *msgfile, const char *sigfile,
337: int embedded)
1.1 tedu 338: {
339: struct sig sig;
340: uint8_t digest[SHA512_DIGEST_LENGTH];
341: struct enckey enckey;
342: uint8_t xorkey[sizeof(enckey.seckey)];
343: uint8_t *msg;
1.51 tedu 344: char comment[COMMENTMAXLEN], sigcomment[COMMENTMAXLEN];
345: char *secname;
1.1 tedu 346: unsigned long long msglen;
347: int i, rounds;
348: SHA2_CTX ctx;
349:
1.18 tedu 350: readb64file(seckeyfile, &enckey, sizeof(enckey), comment);
1.1 tedu 351:
1.65 tedu 352: if (memcmp(enckey.kdfalg, KDFALG, 2) != 0)
1.1 tedu 353: errx(1, "unsupported KDF");
354: rounds = ntohl(enckey.kdfrounds);
1.50 tedu 355: kdf(enckey.salt, sizeof(enckey.salt), rounds, strcmp(msgfile, "-") != 0,
356: xorkey, sizeof(xorkey));
1.1 tedu 357: for (i = 0; i < sizeof(enckey.seckey); i++)
358: enckey.seckey[i] ^= xorkey[i];
1.41 tedu 359: explicit_bzero(xorkey, sizeof(xorkey));
1.1 tedu 360: SHA512Init(&ctx);
361: SHA512Update(&ctx, enckey.seckey, sizeof(enckey.seckey));
362: SHA512Final(digest, &ctx);
1.65 tedu 363: if (memcmp(enckey.checksum, digest, sizeof(enckey.checksum)) != 0)
1.1 tedu 364: errx(1, "incorrect passphrase");
1.41 tedu 365: explicit_bzero(digest, sizeof(digest));
1.1 tedu 366:
1.16 tedu 367: msg = readmsg(msgfile, &msglen);
1.1 tedu 368:
369: signmsg(enckey.seckey, msg, msglen, sig.sig);
1.13 tedu 370: memcpy(sig.fingerprint, enckey.fingerprint, FPLEN);
1.41 tedu 371: explicit_bzero(&enckey, sizeof(enckey));
1.1 tedu 372:
373: memcpy(sig.pkalg, PKALG, 2);
1.51 tedu 374: if ((secname = strstr(seckeyfile, ".sec")) && strlen(secname) == 4) {
375: if (snprintf(sigcomment, sizeof(sigcomment), VERIFYWITH "%.*s.pub",
1.57 tedu 376: (int)strlen(seckeyfile) - 4, seckeyfile) >= sizeof(sigcomment))
377: err(1, "comment too long");
1.51 tedu 378: } else {
379: if (snprintf(sigcomment, sizeof(sigcomment), "signature from %s",
380: comment) >= sizeof(sigcomment))
381: err(1, "comment too long");
382: }
1.16 tedu 383: if (embedded)
1.58 tedu 384: writeb64file(sigfile, sigcomment, &sig, sizeof(sig), msg,
385: msglen, O_TRUNC, 0666);
386: else
387: writeb64file(sigfile, sigcomment, &sig, sizeof(sig), NULL,
388: 0, O_TRUNC, 0666);
1.1 tedu 389:
390: free(msg);
391: }
1.22 tedu 392:
393: static void
394: inspect(const char *seckeyfile, const char *pubkeyfile, const char *sigfile)
395: {
396: struct sig sig;
397: struct enckey enckey;
398: struct pubkey pubkey;
399: char fp[(FPLEN + 2) / 3 * 4 + 1];
400:
401: if (seckeyfile) {
402: readb64file(seckeyfile, &enckey, sizeof(enckey), NULL);
403: b64_ntop(enckey.fingerprint, FPLEN, fp, sizeof(fp));
404: printf("sec fp: %s\n", fp);
405: }
406: if (pubkeyfile) {
407: readb64file(pubkeyfile, &pubkey, sizeof(pubkey), NULL);
408: b64_ntop(pubkey.fingerprint, FPLEN, fp, sizeof(fp));
409: printf("pub fp: %s\n", fp);
410: }
411: if (sigfile) {
412: readb64file(sigfile, &sig, sizeof(sig), NULL);
413: b64_ntop(sig.fingerprint, FPLEN, fp, sizeof(fp));
414: printf("sig fp: %s\n", fp);
415: }
416: }
1.14 tedu 417: #endif
1.1 tedu 418:
419: static void
1.62 tedu 420: verifymsg(struct pubkey *pubkey, uint8_t *msg, unsigned long long msglen,
421: struct sig *sig, int quiet)
1.13 tedu 422: {
423: uint8_t *sigbuf, *dummybuf;
424: unsigned long long siglen, dummylen;
425:
1.65 tedu 426: if (memcmp(pubkey->fingerprint, sig->fingerprint, FPLEN) != 0)
1.62 tedu 427: errx(1, "verification failed: checked against wrong key");
428:
1.13 tedu 429: siglen = SIGBYTES + msglen;
430: sigbuf = xmalloc(siglen);
431: dummybuf = xmalloc(siglen);
1.62 tedu 432: memcpy(sigbuf, sig->sig, SIGBYTES);
1.13 tedu 433: memcpy(sigbuf + SIGBYTES, msg, msglen);
434: if (crypto_sign_ed25519_open(dummybuf, &dummylen, sigbuf, siglen,
1.62 tedu 435: pubkey->pubkey) == -1)
1.13 tedu 436: errx(1, "signature verification failed");
1.42 tedu 437: if (!quiet)
438: printf("Signature Verified\n");
1.13 tedu 439: free(sigbuf);
440: free(dummybuf);
441: }
442:
1.64 tedu 443: static void
444: readpubkey(const char *pubkeyfile, struct pubkey *pubkey,
445: const char *sigcomment)
446: {
447:
448: if (!pubkeyfile) {
449: if ((pubkeyfile = strstr(sigcomment, VERIFYWITH))) {
450: pubkeyfile += strlen(VERIFYWITH);
451: if (strncmp(pubkeyfile, "/etc/signify/", 13) != 0 ||
452: strstr(pubkeyfile, "/../") != NULL)
453: errx(1, "untrusted path %s", pubkeyfile);
454: } else
1.66 tedu 455: usage("must specify pubkey");
1.64 tedu 456: }
457: readb64file(pubkeyfile, pubkey, sizeof(*pubkey), NULL);
458: }
1.13 tedu 459:
460: static void
1.63 tedu 461: verifysimple(const char *pubkeyfile, const char *msgfile, const char *sigfile,
462: int quiet)
1.1 tedu 463: {
1.64 tedu 464: char sigcomment[COMMENTMAXLEN];
1.1 tedu 465: struct sig sig;
466: struct pubkey pubkey;
1.63 tedu 467: unsigned long long msglen;
1.1 tedu 468: uint8_t *msg;
1.16 tedu 469:
1.63 tedu 470: msg = readmsg(msgfile, &msglen);
1.1 tedu 471:
1.64 tedu 472: readb64file(sigfile, &sig, sizeof(sig), sigcomment);
473: readpubkey(pubkeyfile, &pubkey, sigcomment);
1.63 tedu 474:
475: verifymsg(&pubkey, msg, msglen, &sig, quiet);
476:
477: free(msg);
478: }
479:
480: static uint8_t *
481: verifyembedded(const char *pubkeyfile, const char *sigfile,
482: int quiet, unsigned long long *msglenp)
483: {
1.64 tedu 484: char sigcomment[COMMENTMAXLEN];
1.63 tedu 485: struct sig sig;
486: struct pubkey pubkey;
487: unsigned long long msglen, siglen;
488: uint8_t *msg;
489:
490: msg = readmsg(sigfile, &msglen);
491:
1.64 tedu 492: siglen = parseb64file(sigfile, msg, &sig, sizeof(sig), sigcomment);
493: readpubkey(pubkeyfile, &pubkey, sigcomment);
494:
1.63 tedu 495: msglen -= siglen;
496: memmove(msg, msg + siglen, msglen);
497: msg[msglen] = 0;
1.13 tedu 498:
1.62 tedu 499: verifymsg(&pubkey, msg, msglen, &sig, quiet);
1.63 tedu 500:
501: *msglenp = msglen;
502: return msg;
503: }
504:
505: static void
506: verify(const char *pubkeyfile, const char *msgfile, const char *sigfile,
507: int embedded, int quiet)
508: {
509: unsigned long long msglen;
510: uint8_t *msg;
511: int fd;
512:
1.16 tedu 513: if (embedded) {
1.63 tedu 514: msg = verifyembedded(pubkeyfile, sigfile, quiet, &msglen);
1.30 tedu 515: fd = xopen(msgfile, O_CREAT|O_TRUNC|O_NOFOLLOW|O_WRONLY, 0666);
1.16 tedu 516: writeall(fd, msg, msglen, msgfile);
517: close(fd);
1.63 tedu 518: } else {
519: verifysimple(pubkeyfile, msgfile, sigfile, quiet);
1.16 tedu 520: }
1.1 tedu 521: }
522:
1.42 tedu 523: #ifndef VERIFYONLY
524: struct checksum {
525: char file[1024];
526: char hash[1024];
527: char algo[256];
528: };
529:
530: static void
1.45 tedu 531: verifychecksums(char *msg, int argc, char **argv, int quiet)
1.42 tedu 532: {
533: char buf[1024];
1.45 tedu 534: char *line, *endline;
1.42 tedu 535: struct checksum *checksums = NULL, *c = NULL;
536: int nchecksums = 0;
1.43 tedu 537: int i, j, uselist, count, hasfailed;
1.42 tedu 538: int *failures;
539:
1.45 tedu 540: line = msg;
1.42 tedu 541: while (line && *line) {
542: if (!(checksums = realloc(checksums,
543: sizeof(*c) * (nchecksums + 1))))
544: err(1, "realloc");
545: c = &checksums[nchecksums++];
546: if ((endline = strchr(line, '\n')))
547: *endline++ = 0;
548: if (sscanf(line, "%255s %1023s = %1023s",
549: c->algo, buf, c->hash) != 3 ||
550: buf[0] != '(' || buf[strlen(buf) - 1] != ')')
551: errx(1, "unable to parse checksum line %s", line);
552: buf[strlen(buf) - 1] = 0;
553: strlcpy(c->file, buf + 1, sizeof(c->file));
554: line = endline;
555: }
556:
557: if (argc) {
558: uselist = 0;
559: count = argc;
560: } else {
561: uselist = 1;
562: count = nchecksums;
563: }
1.43 tedu 564: if (!(failures = calloc(count, sizeof(int))))
565: err(1, "calloc");
1.42 tedu 566: for (i = 0; i < count; i++) {
567: if (uselist) {
568: c = &checksums[i];
569: } else {
570: for (j = 0; j < nchecksums; j++) {
571: c = &checksums[j];
572: if (strcmp(c->file, argv[i]) == 0)
573: break;
574: }
575: if (j == nchecksums) {
576: failures[i] = 1;
577: continue;
578: }
579: }
580:
581: if (strcmp(c->algo, "SHA256") == 0) {
582: if (!SHA256File(c->file, buf)) {
583: failures[i] = 1;
584: continue;
585: }
586: } else if (strcmp(c->algo, "SHA512") == 0) {
587: if (!SHA512File(c->file, buf)) {
588: failures[i] = 1;
589: continue;
590: }
591: } else {
592: errx(1, "can't handle algorithm %s", c->algo);
593: }
594: if (strcmp(c->hash, buf) != 0) {
595: failures[i] = 1;
596: continue;
597: }
598: if (!quiet)
599: printf("%s: OK\n", c->file);
600: }
1.43 tedu 601: hasfailed = 0;
1.42 tedu 602: for (i = 0; i < count; i++) {
603: if (failures[i]) {
604: fprintf(stderr, "%s: FAIL\n",
605: uselist ? checksums[i].file : argv[i]);
1.43 tedu 606: hasfailed = 1;
1.42 tedu 607: }
608: }
1.43 tedu 609: if (hasfailed)
1.42 tedu 610: exit(1);
611: free(checksums);
1.43 tedu 612: free(failures);
1.42 tedu 613: }
614:
615: static void
616: check(const char *pubkeyfile, const char *sigfile, int quiet, int argc,
617: char **argv)
618: {
1.63 tedu 619: unsigned long long msglen;
1.42 tedu 620: uint8_t *msg;
621:
1.63 tedu 622: msg = verifyembedded(pubkeyfile, sigfile, quiet, &msglen);
1.45 tedu 623: verifychecksums((char *)msg, argc, argv, quiet);
1.42 tedu 624:
1.63 tedu 625: free(msg);
1.42 tedu 626: }
627: #endif
628:
1.1 tedu 629: int
630: main(int argc, char **argv)
631: {
1.16 tedu 632: const char *pubkeyfile = NULL, *seckeyfile = NULL, *msgfile = NULL,
1.1 tedu 633: *sigfile = NULL;
634: char sigfilebuf[1024];
1.27 tedu 635: const char *comment = "signify";
1.1 tedu 636: int ch, rounds;
1.16 tedu 637: int embedded = 0;
1.42 tedu 638: int quiet = 0;
1.6 tedu 639: enum {
640: NONE,
1.42 tedu 641: CHECK,
1.6 tedu 642: GENERATE,
1.22 tedu 643: INSPECT,
1.6 tedu 644: SIGN,
645: VERIFY
646: } verb = NONE;
647:
1.1 tedu 648:
649: rounds = 42;
650:
1.42 tedu 651: while ((ch = getopt(argc, argv, "CGISVc:em:np:qs:x:")) != -1) {
1.1 tedu 652: switch (ch) {
1.14 tedu 653: #ifndef VERIFYONLY
1.42 tedu 654: case 'C':
655: if (verb)
656: usage(NULL);
657: verb = CHECK;
658: break;
1.6 tedu 659: case 'G':
660: if (verb)
1.31 tedu 661: usage(NULL);
1.6 tedu 662: verb = GENERATE;
663: break;
1.22 tedu 664: case 'I':
665: if (verb)
1.31 tedu 666: usage(NULL);
1.22 tedu 667: verb = INSPECT;
668: break;
1.6 tedu 669: case 'S':
670: if (verb)
1.31 tedu 671: usage(NULL);
1.6 tedu 672: verb = SIGN;
673: break;
1.14 tedu 674: #endif
1.6 tedu 675: case 'V':
676: if (verb)
1.31 tedu 677: usage(NULL);
1.6 tedu 678: verb = VERIFY;
679: break;
1.27 tedu 680: case 'c':
681: comment = optarg;
682: break;
1.16 tedu 683: case 'e':
684: embedded = 1;
685: break;
1.31 tedu 686: case 'm':
687: msgfile = optarg;
688: break;
1.6 tedu 689: case 'n':
1.1 tedu 690: rounds = 0;
691: break;
1.6 tedu 692: case 'p':
1.1 tedu 693: pubkeyfile = optarg;
694: break;
1.42 tedu 695: case 'q':
696: quiet = 1;
697: break;
1.6 tedu 698: case 's':
1.1 tedu 699: seckeyfile = optarg;
700: break;
1.31 tedu 701: case 'x':
702: sigfile = optarg;
703: break;
1.1 tedu 704: default:
1.31 tedu 705: usage(NULL);
1.1 tedu 706: break;
707: }
708: }
1.2 tedu 709: argc -= optind;
1.9 espie 710: argv += optind;
711:
1.42 tedu 712: #ifndef VERIFYONLY
713: if (verb == CHECK) {
714: if (!pubkeyfile || !sigfile)
1.66 tedu 715: usage("must specify pubkey and sigfile");
1.42 tedu 716: check(pubkeyfile, sigfile, quiet, argc, argv);
717: return 0;
718: }
719: #endif
720:
721: quiet = 1; /* retain quiet default for 5.5 release */
722:
1.31 tedu 723: if (argc != 0)
724: usage(NULL);
725:
1.36 tedu 726: if (!sigfile && msgfile) {
727: if (strcmp(msgfile, "-") == 0)
1.66 tedu 728: usage("must specify sigfile with - message");
1.36 tedu 729: if (snprintf(sigfilebuf, sizeof(sigfilebuf), "%s.sig",
730: msgfile) >= sizeof(sigfilebuf))
731: errx(1, "path too long");
732: sigfile = sigfilebuf;
733: }
1.1 tedu 734:
1.36 tedu 735: switch (verb) {
1.14 tedu 736: #ifndef VERIFYONLY
1.36 tedu 737: case GENERATE:
1.31 tedu 738: if (!pubkeyfile || !seckeyfile)
1.66 tedu 739: usage("must specify pubkey and seckey");
1.27 tedu 740: generate(pubkeyfile, seckeyfile, rounds, comment);
1.36 tedu 741: break;
742: case INSPECT:
1.22 tedu 743: inspect(seckeyfile, pubkeyfile, sigfile);
1.36 tedu 744: break;
745: case SIGN:
746: if (!msgfile || !seckeyfile)
1.66 tedu 747: usage("must specify message and seckey");
1.36 tedu 748: sign(seckeyfile, msgfile, sigfile, embedded);
749: break;
1.14 tedu 750: #endif
1.36 tedu 751: case VERIFY:
1.51 tedu 752: if (!msgfile)
1.66 tedu 753: usage("must specify message");
1.42 tedu 754: verify(pubkeyfile, msgfile, sigfile, embedded, quiet);
1.36 tedu 755: break;
756: default:
757: usage(NULL);
758: break;
1.1 tedu 759: }
1.9 espie 760:
1.1 tedu 761: return 0;
762: }
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