Annotation of src/usr.bin/signify/signify.c, Revision 1.72
1.72 ! tedu 1: /* $OpenBSD: signify.c,v 1.71 2014/04/22 05:44:40 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)
1.71 tedu 140: errx(1, "comment too long");
1.40 deraadt 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))
1.71 tedu 238: errx(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
1.70 tedu 251: kdf(uint8_t *salt, size_t saltlen, int rounds, int allowstdin, int confirm,
1.50 tedu 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");
1.70 tedu 268: if (confirm && !(rppflags & RPP_STDIN)) {
269: char pass2[1024];
270: if (!readpassphrase("confirm passphrase: ", pass2,
271: sizeof(pass2), rppflags))
272: errx(1, "unable to read passphrase");
273: if (strcmp(pass, pass2) != 0)
274: errx(1, "passwords don't match");
275: explicit_bzero(pass2, sizeof(pass2));
276: }
1.1 tedu 277: if (bcrypt_pbkdf(pass, strlen(pass), salt, saltlen, key,
278: keylen, rounds) == -1)
279: errx(1, "bcrypt pbkdf");
1.41 tedu 280: explicit_bzero(pass, sizeof(pass));
1.1 tedu 281: }
282:
283: static void
284: signmsg(uint8_t *seckey, uint8_t *msg, unsigned long long msglen,
285: uint8_t *sig)
286: {
287: unsigned long long siglen;
288: uint8_t *sigbuf;
289:
290: sigbuf = xmalloc(msglen + SIGBYTES);
291: crypto_sign_ed25519(sigbuf, &siglen, msg, msglen, seckey);
292: memcpy(sig, sigbuf, SIGBYTES);
293: free(sigbuf);
294: }
295:
296: static void
1.27 tedu 297: generate(const char *pubkeyfile, const char *seckeyfile, int rounds,
298: const char *comment)
1.1 tedu 299: {
300: uint8_t digest[SHA512_DIGEST_LENGTH];
301: struct pubkey pubkey;
302: struct enckey enckey;
303: uint8_t xorkey[sizeof(enckey.seckey)];
1.13 tedu 304: uint8_t fingerprint[FPLEN];
1.27 tedu 305: char commentbuf[COMMENTMAXLEN];
1.1 tedu 306: SHA2_CTX ctx;
307: int i;
308:
309: crypto_sign_ed25519_keypair(pubkey.pubkey, enckey.seckey);
1.13 tedu 310: arc4random_buf(fingerprint, sizeof(fingerprint));
1.1 tedu 311:
312: SHA512Init(&ctx);
313: SHA512Update(&ctx, enckey.seckey, sizeof(enckey.seckey));
314: SHA512Final(digest, &ctx);
315:
316: memcpy(enckey.pkalg, PKALG, 2);
317: memcpy(enckey.kdfalg, KDFALG, 2);
318: enckey.kdfrounds = htonl(rounds);
1.13 tedu 319: memcpy(enckey.fingerprint, fingerprint, FPLEN);
1.1 tedu 320: arc4random_buf(enckey.salt, sizeof(enckey.salt));
1.70 tedu 321: kdf(enckey.salt, sizeof(enckey.salt), rounds, 1, 1, xorkey, sizeof(xorkey));
1.1 tedu 322: memcpy(enckey.checksum, digest, sizeof(enckey.checksum));
323: for (i = 0; i < sizeof(enckey.seckey); i++)
324: enckey.seckey[i] ^= xorkey[i];
1.41 tedu 325: explicit_bzero(digest, sizeof(digest));
326: explicit_bzero(xorkey, sizeof(xorkey));
1.1 tedu 327:
1.40 deraadt 328: if (snprintf(commentbuf, sizeof(commentbuf), "%s secret key",
329: comment) >= sizeof(commentbuf))
1.71 tedu 330: errx(1, "comment too long");
1.27 tedu 331: writeb64file(seckeyfile, commentbuf, &enckey,
1.58 tedu 332: sizeof(enckey), NULL, 0, O_EXCL, 0600);
1.41 tedu 333: explicit_bzero(&enckey, sizeof(enckey));
1.1 tedu 334:
335: memcpy(pubkey.pkalg, PKALG, 2);
1.13 tedu 336: memcpy(pubkey.fingerprint, fingerprint, FPLEN);
1.40 deraadt 337: if (snprintf(commentbuf, sizeof(commentbuf), "%s public key",
338: comment) >= sizeof(commentbuf))
1.71 tedu 339: errx(1, "comment too long");
1.27 tedu 340: writeb64file(pubkeyfile, commentbuf, &pubkey,
1.58 tedu 341: sizeof(pubkey), NULL, 0, O_EXCL, 0666);
1.1 tedu 342: }
343:
344: static void
1.16 tedu 345: sign(const char *seckeyfile, const char *msgfile, const char *sigfile,
346: int embedded)
1.1 tedu 347: {
348: struct sig sig;
349: uint8_t digest[SHA512_DIGEST_LENGTH];
350: struct enckey enckey;
351: uint8_t xorkey[sizeof(enckey.seckey)];
352: uint8_t *msg;
1.51 tedu 353: char comment[COMMENTMAXLEN], sigcomment[COMMENTMAXLEN];
354: char *secname;
1.1 tedu 355: unsigned long long msglen;
356: int i, rounds;
357: SHA2_CTX ctx;
358:
1.18 tedu 359: readb64file(seckeyfile, &enckey, sizeof(enckey), comment);
1.1 tedu 360:
1.65 tedu 361: if (memcmp(enckey.kdfalg, KDFALG, 2) != 0)
1.1 tedu 362: errx(1, "unsupported KDF");
363: rounds = ntohl(enckey.kdfrounds);
1.50 tedu 364: kdf(enckey.salt, sizeof(enckey.salt), rounds, strcmp(msgfile, "-") != 0,
1.70 tedu 365: 0, xorkey, sizeof(xorkey));
1.1 tedu 366: for (i = 0; i < sizeof(enckey.seckey); i++)
367: enckey.seckey[i] ^= xorkey[i];
1.41 tedu 368: explicit_bzero(xorkey, sizeof(xorkey));
1.1 tedu 369: SHA512Init(&ctx);
370: SHA512Update(&ctx, enckey.seckey, sizeof(enckey.seckey));
371: SHA512Final(digest, &ctx);
1.65 tedu 372: if (memcmp(enckey.checksum, digest, sizeof(enckey.checksum)) != 0)
1.1 tedu 373: errx(1, "incorrect passphrase");
1.41 tedu 374: explicit_bzero(digest, sizeof(digest));
1.1 tedu 375:
1.16 tedu 376: msg = readmsg(msgfile, &msglen);
1.1 tedu 377:
378: signmsg(enckey.seckey, msg, msglen, sig.sig);
1.13 tedu 379: memcpy(sig.fingerprint, enckey.fingerprint, FPLEN);
1.41 tedu 380: explicit_bzero(&enckey, sizeof(enckey));
1.1 tedu 381:
382: memcpy(sig.pkalg, PKALG, 2);
1.51 tedu 383: if ((secname = strstr(seckeyfile, ".sec")) && strlen(secname) == 4) {
384: if (snprintf(sigcomment, sizeof(sigcomment), VERIFYWITH "%.*s.pub",
1.57 tedu 385: (int)strlen(seckeyfile) - 4, seckeyfile) >= sizeof(sigcomment))
1.71 tedu 386: errx(1, "comment too long");
1.51 tedu 387: } else {
388: if (snprintf(sigcomment, sizeof(sigcomment), "signature from %s",
389: comment) >= sizeof(sigcomment))
1.71 tedu 390: errx(1, "comment too long");
1.51 tedu 391: }
1.16 tedu 392: if (embedded)
1.58 tedu 393: writeb64file(sigfile, sigcomment, &sig, sizeof(sig), msg,
394: msglen, O_TRUNC, 0666);
395: else
396: writeb64file(sigfile, sigcomment, &sig, sizeof(sig), NULL,
397: 0, O_TRUNC, 0666);
1.1 tedu 398:
399: free(msg);
400: }
1.22 tedu 401:
402: static void
403: inspect(const char *seckeyfile, const char *pubkeyfile, const char *sigfile)
404: {
405: struct sig sig;
406: struct enckey enckey;
407: struct pubkey pubkey;
408: char fp[(FPLEN + 2) / 3 * 4 + 1];
409:
410: if (seckeyfile) {
411: readb64file(seckeyfile, &enckey, sizeof(enckey), NULL);
412: b64_ntop(enckey.fingerprint, FPLEN, fp, sizeof(fp));
413: printf("sec fp: %s\n", fp);
414: }
415: if (pubkeyfile) {
416: readb64file(pubkeyfile, &pubkey, sizeof(pubkey), NULL);
417: b64_ntop(pubkey.fingerprint, FPLEN, fp, sizeof(fp));
418: printf("pub fp: %s\n", fp);
419: }
420: if (sigfile) {
421: readb64file(sigfile, &sig, sizeof(sig), NULL);
422: b64_ntop(sig.fingerprint, FPLEN, fp, sizeof(fp));
423: printf("sig fp: %s\n", fp);
424: }
425: }
1.14 tedu 426: #endif
1.1 tedu 427:
428: static void
1.62 tedu 429: verifymsg(struct pubkey *pubkey, uint8_t *msg, unsigned long long msglen,
430: struct sig *sig, int quiet)
1.13 tedu 431: {
432: uint8_t *sigbuf, *dummybuf;
433: unsigned long long siglen, dummylen;
434:
1.65 tedu 435: if (memcmp(pubkey->fingerprint, sig->fingerprint, FPLEN) != 0)
1.62 tedu 436: errx(1, "verification failed: checked against wrong key");
437:
1.13 tedu 438: siglen = SIGBYTES + msglen;
439: sigbuf = xmalloc(siglen);
440: dummybuf = xmalloc(siglen);
1.62 tedu 441: memcpy(sigbuf, sig->sig, SIGBYTES);
1.13 tedu 442: memcpy(sigbuf + SIGBYTES, msg, msglen);
443: if (crypto_sign_ed25519_open(dummybuf, &dummylen, sigbuf, siglen,
1.62 tedu 444: pubkey->pubkey) == -1)
1.13 tedu 445: errx(1, "signature verification failed");
1.42 tedu 446: if (!quiet)
447: printf("Signature Verified\n");
1.13 tedu 448: free(sigbuf);
449: free(dummybuf);
450: }
451:
1.64 tedu 452: static void
453: readpubkey(const char *pubkeyfile, struct pubkey *pubkey,
454: const char *sigcomment)
455: {
456:
457: if (!pubkeyfile) {
458: if ((pubkeyfile = strstr(sigcomment, VERIFYWITH))) {
459: pubkeyfile += strlen(VERIFYWITH);
460: if (strncmp(pubkeyfile, "/etc/signify/", 13) != 0 ||
461: strstr(pubkeyfile, "/../") != NULL)
462: errx(1, "untrusted path %s", pubkeyfile);
463: } else
1.66 tedu 464: usage("must specify pubkey");
1.64 tedu 465: }
466: readb64file(pubkeyfile, pubkey, sizeof(*pubkey), NULL);
467: }
1.13 tedu 468:
469: static void
1.63 tedu 470: verifysimple(const char *pubkeyfile, const char *msgfile, const char *sigfile,
471: int quiet)
1.1 tedu 472: {
1.64 tedu 473: char sigcomment[COMMENTMAXLEN];
1.1 tedu 474: struct sig sig;
475: struct pubkey pubkey;
1.63 tedu 476: unsigned long long msglen;
1.1 tedu 477: uint8_t *msg;
1.16 tedu 478:
1.63 tedu 479: msg = readmsg(msgfile, &msglen);
1.1 tedu 480:
1.64 tedu 481: readb64file(sigfile, &sig, sizeof(sig), sigcomment);
482: readpubkey(pubkeyfile, &pubkey, sigcomment);
1.63 tedu 483:
484: verifymsg(&pubkey, msg, msglen, &sig, quiet);
485:
486: free(msg);
487: }
488:
489: static uint8_t *
490: verifyembedded(const char *pubkeyfile, const char *sigfile,
491: int quiet, unsigned long long *msglenp)
492: {
1.64 tedu 493: char sigcomment[COMMENTMAXLEN];
1.63 tedu 494: struct sig sig;
495: struct pubkey pubkey;
496: unsigned long long msglen, siglen;
497: uint8_t *msg;
498:
499: msg = readmsg(sigfile, &msglen);
500:
1.64 tedu 501: siglen = parseb64file(sigfile, msg, &sig, sizeof(sig), sigcomment);
502: readpubkey(pubkeyfile, &pubkey, sigcomment);
503:
1.63 tedu 504: msglen -= siglen;
505: memmove(msg, msg + siglen, msglen);
506: msg[msglen] = 0;
1.13 tedu 507:
1.62 tedu 508: verifymsg(&pubkey, msg, msglen, &sig, quiet);
1.63 tedu 509:
510: *msglenp = msglen;
511: return msg;
512: }
513:
514: static void
515: verify(const char *pubkeyfile, const char *msgfile, const char *sigfile,
516: int embedded, int quiet)
517: {
518: unsigned long long msglen;
519: uint8_t *msg;
520: int fd;
521:
1.16 tedu 522: if (embedded) {
1.63 tedu 523: msg = verifyembedded(pubkeyfile, sigfile, quiet, &msglen);
1.30 tedu 524: fd = xopen(msgfile, O_CREAT|O_TRUNC|O_NOFOLLOW|O_WRONLY, 0666);
1.16 tedu 525: writeall(fd, msg, msglen, msgfile);
1.68 espie 526: free(msg);
1.16 tedu 527: close(fd);
1.63 tedu 528: } else {
529: verifysimple(pubkeyfile, msgfile, sigfile, quiet);
1.16 tedu 530: }
1.1 tedu 531: }
532:
1.42 tedu 533: #ifndef VERIFYONLY
534: struct checksum {
535: char file[1024];
536: char hash[1024];
537: char algo[256];
538: };
539:
540: static void
1.45 tedu 541: verifychecksums(char *msg, int argc, char **argv, int quiet)
1.42 tedu 542: {
543: char buf[1024];
1.45 tedu 544: char *line, *endline;
1.42 tedu 545: struct checksum *checksums = NULL, *c = NULL;
546: int nchecksums = 0;
1.43 tedu 547: int i, j, uselist, count, hasfailed;
1.42 tedu 548: int *failures;
549:
1.45 tedu 550: line = msg;
1.42 tedu 551: while (line && *line) {
1.72 ! tedu 552: if (!(checksums = reallocarray(checksums,
! 553: nchecksums + 1, sizeof(*checksums))))
1.42 tedu 554: err(1, "realloc");
555: c = &checksums[nchecksums++];
556: if ((endline = strchr(line, '\n')))
557: *endline++ = 0;
558: if (sscanf(line, "%255s %1023s = %1023s",
559: c->algo, buf, c->hash) != 3 ||
560: buf[0] != '(' || buf[strlen(buf) - 1] != ')')
561: errx(1, "unable to parse checksum line %s", line);
562: buf[strlen(buf) - 1] = 0;
563: strlcpy(c->file, buf + 1, sizeof(c->file));
564: line = endline;
565: }
566:
567: if (argc) {
568: uselist = 0;
569: count = argc;
570: } else {
571: uselist = 1;
572: count = nchecksums;
573: }
1.43 tedu 574: if (!(failures = calloc(count, sizeof(int))))
575: err(1, "calloc");
1.42 tedu 576: for (i = 0; i < count; i++) {
577: if (uselist) {
578: c = &checksums[i];
579: } else {
580: for (j = 0; j < nchecksums; j++) {
581: c = &checksums[j];
582: if (strcmp(c->file, argv[i]) == 0)
583: break;
584: }
585: if (j == nchecksums) {
586: failures[i] = 1;
587: continue;
588: }
589: }
590:
591: if (strcmp(c->algo, "SHA256") == 0) {
592: if (!SHA256File(c->file, buf)) {
593: failures[i] = 1;
594: continue;
595: }
596: } else if (strcmp(c->algo, "SHA512") == 0) {
597: if (!SHA512File(c->file, buf)) {
598: failures[i] = 1;
599: continue;
600: }
601: } else {
602: errx(1, "can't handle algorithm %s", c->algo);
603: }
604: if (strcmp(c->hash, buf) != 0) {
605: failures[i] = 1;
606: continue;
607: }
608: if (!quiet)
609: printf("%s: OK\n", c->file);
610: }
1.43 tedu 611: hasfailed = 0;
1.42 tedu 612: for (i = 0; i < count; i++) {
613: if (failures[i]) {
614: fprintf(stderr, "%s: FAIL\n",
615: uselist ? checksums[i].file : argv[i]);
1.43 tedu 616: hasfailed = 1;
1.42 tedu 617: }
618: }
1.43 tedu 619: if (hasfailed)
1.42 tedu 620: exit(1);
621: free(checksums);
1.43 tedu 622: free(failures);
1.42 tedu 623: }
624:
625: static void
626: check(const char *pubkeyfile, const char *sigfile, int quiet, int argc,
627: char **argv)
628: {
1.63 tedu 629: unsigned long long msglen;
1.42 tedu 630: uint8_t *msg;
631:
1.63 tedu 632: msg = verifyembedded(pubkeyfile, sigfile, quiet, &msglen);
1.45 tedu 633: verifychecksums((char *)msg, argc, argv, quiet);
1.42 tedu 634:
1.63 tedu 635: free(msg);
1.42 tedu 636: }
637: #endif
638:
1.1 tedu 639: int
640: main(int argc, char **argv)
641: {
1.16 tedu 642: const char *pubkeyfile = NULL, *seckeyfile = NULL, *msgfile = NULL,
1.1 tedu 643: *sigfile = NULL;
644: char sigfilebuf[1024];
1.27 tedu 645: const char *comment = "signify";
1.1 tedu 646: int ch, rounds;
1.16 tedu 647: int embedded = 0;
1.42 tedu 648: int quiet = 0;
1.6 tedu 649: enum {
650: NONE,
1.42 tedu 651: CHECK,
1.6 tedu 652: GENERATE,
1.22 tedu 653: INSPECT,
1.6 tedu 654: SIGN,
655: VERIFY
656: } verb = NONE;
657:
1.1 tedu 658:
659: rounds = 42;
660:
1.42 tedu 661: while ((ch = getopt(argc, argv, "CGISVc:em:np:qs:x:")) != -1) {
1.1 tedu 662: switch (ch) {
1.14 tedu 663: #ifndef VERIFYONLY
1.42 tedu 664: case 'C':
665: if (verb)
666: usage(NULL);
667: verb = CHECK;
668: break;
1.6 tedu 669: case 'G':
670: if (verb)
1.31 tedu 671: usage(NULL);
1.6 tedu 672: verb = GENERATE;
673: break;
1.22 tedu 674: case 'I':
675: if (verb)
1.31 tedu 676: usage(NULL);
1.22 tedu 677: verb = INSPECT;
678: break;
1.6 tedu 679: case 'S':
680: if (verb)
1.31 tedu 681: usage(NULL);
1.6 tedu 682: verb = SIGN;
683: break;
1.14 tedu 684: #endif
1.6 tedu 685: case 'V':
686: if (verb)
1.31 tedu 687: usage(NULL);
1.6 tedu 688: verb = VERIFY;
689: break;
1.27 tedu 690: case 'c':
691: comment = optarg;
692: break;
1.16 tedu 693: case 'e':
694: embedded = 1;
695: break;
1.31 tedu 696: case 'm':
697: msgfile = optarg;
698: break;
1.6 tedu 699: case 'n':
1.1 tedu 700: rounds = 0;
701: break;
1.6 tedu 702: case 'p':
1.1 tedu 703: pubkeyfile = optarg;
704: break;
1.42 tedu 705: case 'q':
706: quiet = 1;
707: break;
1.6 tedu 708: case 's':
1.1 tedu 709: seckeyfile = optarg;
710: break;
1.31 tedu 711: case 'x':
712: sigfile = optarg;
713: break;
1.1 tedu 714: default:
1.31 tedu 715: usage(NULL);
1.1 tedu 716: break;
717: }
718: }
1.2 tedu 719: argc -= optind;
1.9 espie 720: argv += optind;
721:
1.42 tedu 722: #ifndef VERIFYONLY
723: if (verb == CHECK) {
724: if (!pubkeyfile || !sigfile)
1.66 tedu 725: usage("must specify pubkey and sigfile");
1.42 tedu 726: check(pubkeyfile, sigfile, quiet, argc, argv);
727: return 0;
728: }
729: #endif
730:
1.31 tedu 731: if (argc != 0)
732: usage(NULL);
733:
1.36 tedu 734: if (!sigfile && msgfile) {
735: if (strcmp(msgfile, "-") == 0)
1.66 tedu 736: usage("must specify sigfile with - message");
1.36 tedu 737: if (snprintf(sigfilebuf, sizeof(sigfilebuf), "%s.sig",
738: msgfile) >= sizeof(sigfilebuf))
739: errx(1, "path too long");
740: sigfile = sigfilebuf;
741: }
1.1 tedu 742:
1.36 tedu 743: switch (verb) {
1.14 tedu 744: #ifndef VERIFYONLY
1.36 tedu 745: case GENERATE:
1.31 tedu 746: if (!pubkeyfile || !seckeyfile)
1.66 tedu 747: usage("must specify pubkey and seckey");
1.27 tedu 748: generate(pubkeyfile, seckeyfile, rounds, comment);
1.36 tedu 749: break;
750: case INSPECT:
1.22 tedu 751: inspect(seckeyfile, pubkeyfile, sigfile);
1.36 tedu 752: break;
753: case SIGN:
754: if (!msgfile || !seckeyfile)
1.66 tedu 755: usage("must specify message and seckey");
1.36 tedu 756: sign(seckeyfile, msgfile, sigfile, embedded);
757: break;
1.14 tedu 758: #endif
1.36 tedu 759: case VERIFY:
1.51 tedu 760: if (!msgfile)
1.66 tedu 761: usage("must specify message");
1.42 tedu 762: verify(pubkeyfile, msgfile, sigfile, embedded, quiet);
1.36 tedu 763: break;
764: default:
765: usage(NULL);
766: break;
1.1 tedu 767: }
1.9 espie 768:
1.1 tedu 769: return 0;
770: }
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