Annotation of src/usr.bin/signify/signify.c, Revision 1.75
1.75 ! tedu 1: /* $OpenBSD: signify.c,v 1.74 2014/05/06 23:19:46 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);
1.75 ! 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);
1.75 ! tedu 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: rv = read(fd, b64, sizeof(b64) - 1);
162: if (rv == -1)
1.7 espie 163: err(1, "read from %s", filename);
1.75 ! tedu 164: b64[rv] = '\0';
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;
1.73 tedu 178: const unsigned long long maxmsgsize = 1UL << 30;
1.1 tedu 179:
180: fd = xopen(filename, O_RDONLY | O_NOFOLLOW, 0);
1.49 tedu 181: if (fstat(fd, &sb) == 0 && S_ISREG(sb.st_mode)) {
1.73 tedu 182: if (sb.st_size > maxmsgsize)
1.49 tedu 183: errx(1, "msg too large in %s", filename);
184: space = sb.st_size + 1;
185: } else {
1.67 tedu 186: space = 64 * 1024;
1.49 tedu 187: }
188:
1.67 tedu 189: msg = xmalloc(space + 1);
1.49 tedu 190: while (1) {
191: if (space == 0) {
1.73 tedu 192: if (msglen * 2 > maxmsgsize)
1.67 tedu 193: errx(1, "msg too large in %s", filename);
194: space = msglen;
1.49 tedu 195: if (!(msg = realloc(msg, msglen + space + 1)))
196: errx(1, "realloc");
197: }
198: if ((x = read(fd, msg + msglen, space)) == -1)
199: err(1, "read from %s", filename);
200: if (x == 0)
201: break;
202: space -= x;
203: msglen += x;
204: }
205:
1.75 ! tedu 206: msg[msglen] = '\0';
1.1 tedu 207: close(fd);
208:
209: *msglenp = msglen;
210: return msg;
211: }
212:
213: static void
1.46 tedu 214: writeall(int fd, const void *buf, size_t buflen, const char *filename)
1.1 tedu 215: {
1.11 tedu 216: ssize_t x;
1.38 espie 217:
1.46 tedu 218: while (buflen != 0) {
219: x = write(fd, buf, buflen);
1.38 espie 220: if (x == -1)
221: err(1, "write to %s", filename);
1.46 tedu 222: buflen -= x;
1.61 deraadt 223: buf = (char *)buf + x;
1.7 espie 224: }
1.1 tedu 225: }
226:
1.17 deraadt 227: #ifndef VERIFYONLY
1.1 tedu 228: static void
229: writeb64file(const char *filename, const char *comment, const void *buf,
1.61 deraadt 230: size_t buflen, const void *msg, size_t msglen, int oflags, mode_t mode)
1.1 tedu 231: {
232: char header[1024];
233: char b64[1024];
234: int fd, rv;
235:
1.61 deraadt 236: fd = xopen(filename, O_CREAT|oflags|O_NOFOLLOW|O_WRONLY, mode);
1.40 deraadt 237: if (snprintf(header, sizeof(header), "%s%s\n",
238: COMMENTHDR, comment) >= sizeof(header))
1.71 tedu 239: errx(1, "comment too long");
1.7 espie 240: writeall(fd, header, strlen(header), filename);
1.46 tedu 241: if ((rv = b64_ntop(buf, buflen, b64, sizeof(b64)-1)) == -1)
1.1 tedu 242: errx(1, "b64 encode failed");
1.8 espie 243: b64[rv++] = '\n';
1.7 espie 244: writeall(fd, b64, rv, filename);
1.41 tedu 245: explicit_bzero(b64, sizeof(b64));
1.58 tedu 246: if (msg)
247: writeall(fd, msg, msglen, filename);
1.1 tedu 248: close(fd);
249: }
250:
251: static void
1.70 tedu 252: kdf(uint8_t *salt, size_t saltlen, int rounds, int allowstdin, int confirm,
1.50 tedu 253: uint8_t *key, size_t keylen)
1.1 tedu 254: {
255: char pass[1024];
1.48 tedu 256: int rppflags = RPP_ECHO_OFF;
1.1 tedu 257:
258: if (rounds == 0) {
259: memset(key, 0, keylen);
260: return;
261: }
262:
1.50 tedu 263: if (allowstdin && !isatty(STDIN_FILENO))
1.48 tedu 264: rppflags |= RPP_STDIN;
265: if (!readpassphrase("passphrase: ", pass, sizeof(pass), rppflags))
1.39 tedu 266: errx(1, "unable to read passphrase");
1.37 tedu 267: if (strlen(pass) == 0)
268: errx(1, "please provide a password");
1.70 tedu 269: if (confirm && !(rppflags & RPP_STDIN)) {
270: char pass2[1024];
271: if (!readpassphrase("confirm passphrase: ", pass2,
272: sizeof(pass2), rppflags))
273: errx(1, "unable to read passphrase");
274: if (strcmp(pass, pass2) != 0)
275: errx(1, "passwords don't match");
276: explicit_bzero(pass2, sizeof(pass2));
277: }
1.1 tedu 278: if (bcrypt_pbkdf(pass, strlen(pass), salt, saltlen, key,
279: keylen, rounds) == -1)
280: errx(1, "bcrypt pbkdf");
1.41 tedu 281: explicit_bzero(pass, sizeof(pass));
1.1 tedu 282: }
283:
284: static void
285: signmsg(uint8_t *seckey, uint8_t *msg, unsigned long long msglen,
286: uint8_t *sig)
287: {
288: unsigned long long siglen;
289: uint8_t *sigbuf;
290:
291: sigbuf = xmalloc(msglen + SIGBYTES);
292: crypto_sign_ed25519(sigbuf, &siglen, msg, msglen, seckey);
293: memcpy(sig, sigbuf, SIGBYTES);
294: free(sigbuf);
295: }
296:
297: static void
1.27 tedu 298: generate(const char *pubkeyfile, const char *seckeyfile, int rounds,
299: const char *comment)
1.1 tedu 300: {
301: uint8_t digest[SHA512_DIGEST_LENGTH];
302: struct pubkey pubkey;
303: struct enckey enckey;
304: uint8_t xorkey[sizeof(enckey.seckey)];
1.13 tedu 305: uint8_t fingerprint[FPLEN];
1.27 tedu 306: char commentbuf[COMMENTMAXLEN];
1.1 tedu 307: SHA2_CTX ctx;
308: int i;
309:
310: crypto_sign_ed25519_keypair(pubkey.pubkey, enckey.seckey);
1.13 tedu 311: arc4random_buf(fingerprint, sizeof(fingerprint));
1.1 tedu 312:
313: SHA512Init(&ctx);
314: SHA512Update(&ctx, enckey.seckey, sizeof(enckey.seckey));
315: SHA512Final(digest, &ctx);
316:
317: memcpy(enckey.pkalg, PKALG, 2);
318: memcpy(enckey.kdfalg, KDFALG, 2);
319: enckey.kdfrounds = htonl(rounds);
1.13 tedu 320: memcpy(enckey.fingerprint, fingerprint, FPLEN);
1.1 tedu 321: arc4random_buf(enckey.salt, sizeof(enckey.salt));
1.70 tedu 322: kdf(enckey.salt, sizeof(enckey.salt), rounds, 1, 1, xorkey, sizeof(xorkey));
1.1 tedu 323: memcpy(enckey.checksum, digest, sizeof(enckey.checksum));
324: for (i = 0; i < sizeof(enckey.seckey); i++)
325: enckey.seckey[i] ^= xorkey[i];
1.41 tedu 326: explicit_bzero(digest, sizeof(digest));
327: explicit_bzero(xorkey, sizeof(xorkey));
1.1 tedu 328:
1.40 deraadt 329: if (snprintf(commentbuf, sizeof(commentbuf), "%s secret key",
330: comment) >= sizeof(commentbuf))
1.71 tedu 331: errx(1, "comment too long");
1.27 tedu 332: writeb64file(seckeyfile, commentbuf, &enckey,
1.58 tedu 333: sizeof(enckey), NULL, 0, O_EXCL, 0600);
1.41 tedu 334: explicit_bzero(&enckey, sizeof(enckey));
1.1 tedu 335:
336: memcpy(pubkey.pkalg, PKALG, 2);
1.13 tedu 337: memcpy(pubkey.fingerprint, fingerprint, FPLEN);
1.40 deraadt 338: if (snprintf(commentbuf, sizeof(commentbuf), "%s public key",
339: comment) >= sizeof(commentbuf))
1.71 tedu 340: errx(1, "comment too long");
1.27 tedu 341: writeb64file(pubkeyfile, commentbuf, &pubkey,
1.58 tedu 342: sizeof(pubkey), NULL, 0, O_EXCL, 0666);
1.1 tedu 343: }
344:
345: static void
1.16 tedu 346: sign(const char *seckeyfile, const char *msgfile, const char *sigfile,
347: int embedded)
1.1 tedu 348: {
349: struct sig sig;
350: uint8_t digest[SHA512_DIGEST_LENGTH];
351: struct enckey enckey;
352: uint8_t xorkey[sizeof(enckey.seckey)];
353: uint8_t *msg;
1.51 tedu 354: char comment[COMMENTMAXLEN], sigcomment[COMMENTMAXLEN];
355: char *secname;
1.1 tedu 356: unsigned long long msglen;
357: int i, rounds;
358: SHA2_CTX ctx;
359:
1.18 tedu 360: readb64file(seckeyfile, &enckey, sizeof(enckey), comment);
1.1 tedu 361:
1.65 tedu 362: if (memcmp(enckey.kdfalg, KDFALG, 2) != 0)
1.1 tedu 363: errx(1, "unsupported KDF");
364: rounds = ntohl(enckey.kdfrounds);
1.50 tedu 365: kdf(enckey.salt, sizeof(enckey.salt), rounds, strcmp(msgfile, "-") != 0,
1.70 tedu 366: 0, xorkey, sizeof(xorkey));
1.1 tedu 367: for (i = 0; i < sizeof(enckey.seckey); i++)
368: enckey.seckey[i] ^= xorkey[i];
1.41 tedu 369: explicit_bzero(xorkey, sizeof(xorkey));
1.1 tedu 370: SHA512Init(&ctx);
371: SHA512Update(&ctx, enckey.seckey, sizeof(enckey.seckey));
372: SHA512Final(digest, &ctx);
1.65 tedu 373: if (memcmp(enckey.checksum, digest, sizeof(enckey.checksum)) != 0)
1.1 tedu 374: errx(1, "incorrect passphrase");
1.41 tedu 375: explicit_bzero(digest, sizeof(digest));
1.1 tedu 376:
1.16 tedu 377: msg = readmsg(msgfile, &msglen);
1.1 tedu 378:
379: signmsg(enckey.seckey, msg, msglen, sig.sig);
1.13 tedu 380: memcpy(sig.fingerprint, enckey.fingerprint, FPLEN);
1.41 tedu 381: explicit_bzero(&enckey, sizeof(enckey));
1.1 tedu 382:
383: memcpy(sig.pkalg, PKALG, 2);
1.51 tedu 384: if ((secname = strstr(seckeyfile, ".sec")) && strlen(secname) == 4) {
385: if (snprintf(sigcomment, sizeof(sigcomment), VERIFYWITH "%.*s.pub",
1.57 tedu 386: (int)strlen(seckeyfile) - 4, seckeyfile) >= sizeof(sigcomment))
1.71 tedu 387: errx(1, "comment too long");
1.51 tedu 388: } else {
389: if (snprintf(sigcomment, sizeof(sigcomment), "signature from %s",
390: comment) >= sizeof(sigcomment))
1.71 tedu 391: errx(1, "comment too long");
1.51 tedu 392: }
1.16 tedu 393: if (embedded)
1.58 tedu 394: writeb64file(sigfile, sigcomment, &sig, sizeof(sig), msg,
395: msglen, O_TRUNC, 0666);
396: else
397: writeb64file(sigfile, sigcomment, &sig, sizeof(sig), NULL,
398: 0, O_TRUNC, 0666);
1.1 tedu 399:
400: free(msg);
401: }
1.22 tedu 402:
403: static void
404: inspect(const char *seckeyfile, const char *pubkeyfile, const char *sigfile)
405: {
406: struct sig sig;
407: struct enckey enckey;
408: struct pubkey pubkey;
409: char fp[(FPLEN + 2) / 3 * 4 + 1];
410:
411: if (seckeyfile) {
412: readb64file(seckeyfile, &enckey, sizeof(enckey), NULL);
413: b64_ntop(enckey.fingerprint, FPLEN, fp, sizeof(fp));
414: printf("sec fp: %s\n", fp);
415: }
416: if (pubkeyfile) {
417: readb64file(pubkeyfile, &pubkey, sizeof(pubkey), NULL);
418: b64_ntop(pubkey.fingerprint, FPLEN, fp, sizeof(fp));
419: printf("pub fp: %s\n", fp);
420: }
421: if (sigfile) {
422: readb64file(sigfile, &sig, sizeof(sig), NULL);
423: b64_ntop(sig.fingerprint, FPLEN, fp, sizeof(fp));
424: printf("sig fp: %s\n", fp);
425: }
426: }
1.14 tedu 427: #endif
1.1 tedu 428:
429: static void
1.62 tedu 430: verifymsg(struct pubkey *pubkey, uint8_t *msg, unsigned long long msglen,
431: struct sig *sig, int quiet)
1.13 tedu 432: {
433: uint8_t *sigbuf, *dummybuf;
434: unsigned long long siglen, dummylen;
435:
1.65 tedu 436: if (memcmp(pubkey->fingerprint, sig->fingerprint, FPLEN) != 0)
1.62 tedu 437: errx(1, "verification failed: checked against wrong key");
438:
1.13 tedu 439: siglen = SIGBYTES + msglen;
440: sigbuf = xmalloc(siglen);
441: dummybuf = xmalloc(siglen);
1.62 tedu 442: memcpy(sigbuf, sig->sig, SIGBYTES);
1.13 tedu 443: memcpy(sigbuf + SIGBYTES, msg, msglen);
444: if (crypto_sign_ed25519_open(dummybuf, &dummylen, sigbuf, siglen,
1.62 tedu 445: pubkey->pubkey) == -1)
1.13 tedu 446: errx(1, "signature verification failed");
1.42 tedu 447: if (!quiet)
448: printf("Signature Verified\n");
1.13 tedu 449: free(sigbuf);
450: free(dummybuf);
451: }
452:
1.64 tedu 453: static void
454: readpubkey(const char *pubkeyfile, struct pubkey *pubkey,
455: const char *sigcomment)
456: {
457:
458: if (!pubkeyfile) {
459: if ((pubkeyfile = strstr(sigcomment, VERIFYWITH))) {
460: pubkeyfile += strlen(VERIFYWITH);
461: if (strncmp(pubkeyfile, "/etc/signify/", 13) != 0 ||
462: strstr(pubkeyfile, "/../") != NULL)
463: errx(1, "untrusted path %s", pubkeyfile);
464: } else
1.66 tedu 465: usage("must specify pubkey");
1.64 tedu 466: }
467: readb64file(pubkeyfile, pubkey, sizeof(*pubkey), NULL);
468: }
1.13 tedu 469:
470: static void
1.63 tedu 471: verifysimple(const char *pubkeyfile, const char *msgfile, const char *sigfile,
472: int quiet)
1.1 tedu 473: {
1.64 tedu 474: char sigcomment[COMMENTMAXLEN];
1.1 tedu 475: struct sig sig;
476: struct pubkey pubkey;
1.63 tedu 477: unsigned long long msglen;
1.1 tedu 478: uint8_t *msg;
1.16 tedu 479:
1.63 tedu 480: msg = readmsg(msgfile, &msglen);
1.1 tedu 481:
1.64 tedu 482: readb64file(sigfile, &sig, sizeof(sig), sigcomment);
483: readpubkey(pubkeyfile, &pubkey, sigcomment);
1.63 tedu 484:
485: verifymsg(&pubkey, msg, msglen, &sig, quiet);
486:
487: free(msg);
488: }
489:
490: static uint8_t *
491: verifyembedded(const char *pubkeyfile, const char *sigfile,
492: int quiet, unsigned long long *msglenp)
493: {
1.64 tedu 494: char sigcomment[COMMENTMAXLEN];
1.63 tedu 495: struct sig sig;
496: struct pubkey pubkey;
497: unsigned long long msglen, siglen;
498: uint8_t *msg;
499:
500: msg = readmsg(sigfile, &msglen);
501:
1.64 tedu 502: siglen = parseb64file(sigfile, msg, &sig, sizeof(sig), sigcomment);
503: readpubkey(pubkeyfile, &pubkey, sigcomment);
504:
1.63 tedu 505: msglen -= siglen;
506: memmove(msg, msg + siglen, msglen);
507: msg[msglen] = 0;
1.13 tedu 508:
1.62 tedu 509: verifymsg(&pubkey, msg, msglen, &sig, quiet);
1.63 tedu 510:
511: *msglenp = msglen;
512: return msg;
513: }
514:
515: static void
516: verify(const char *pubkeyfile, const char *msgfile, const char *sigfile,
517: int embedded, int quiet)
518: {
519: unsigned long long msglen;
520: uint8_t *msg;
521: int fd;
522:
1.16 tedu 523: if (embedded) {
1.63 tedu 524: msg = verifyembedded(pubkeyfile, sigfile, quiet, &msglen);
1.30 tedu 525: fd = xopen(msgfile, O_CREAT|O_TRUNC|O_NOFOLLOW|O_WRONLY, 0666);
1.16 tedu 526: writeall(fd, msg, msglen, msgfile);
1.68 espie 527: free(msg);
1.16 tedu 528: close(fd);
1.63 tedu 529: } else {
530: verifysimple(pubkeyfile, msgfile, sigfile, quiet);
1.16 tedu 531: }
1.1 tedu 532: }
533:
1.42 tedu 534: #ifndef VERIFYONLY
535: struct checksum {
536: char file[1024];
537: char hash[1024];
538: char algo[256];
539: };
540:
541: static void
1.45 tedu 542: verifychecksums(char *msg, int argc, char **argv, int quiet)
1.42 tedu 543: {
544: char buf[1024];
1.45 tedu 545: char *line, *endline;
1.42 tedu 546: struct checksum *checksums = NULL, *c = NULL;
547: int nchecksums = 0;
1.43 tedu 548: int i, j, uselist, count, hasfailed;
1.42 tedu 549: int *failures;
550:
1.45 tedu 551: line = msg;
1.42 tedu 552: while (line && *line) {
1.72 tedu 553: if (!(checksums = reallocarray(checksums,
554: nchecksums + 1, sizeof(*checksums))))
1.42 tedu 555: err(1, "realloc");
556: c = &checksums[nchecksums++];
557: if ((endline = strchr(line, '\n')))
558: *endline++ = 0;
559: if (sscanf(line, "%255s %1023s = %1023s",
560: c->algo, buf, c->hash) != 3 ||
561: buf[0] != '(' || buf[strlen(buf) - 1] != ')')
562: errx(1, "unable to parse checksum line %s", line);
563: buf[strlen(buf) - 1] = 0;
564: strlcpy(c->file, buf + 1, sizeof(c->file));
565: line = endline;
566: }
567:
568: if (argc) {
569: uselist = 0;
570: count = argc;
571: } else {
572: uselist = 1;
573: count = nchecksums;
574: }
1.74 tedu 575: if (!(failures = calloc(count, sizeof(*failures))))
1.43 tedu 576: err(1, "calloc");
1.42 tedu 577: for (i = 0; i < count; i++) {
578: if (uselist) {
579: c = &checksums[i];
580: } else {
581: for (j = 0; j < nchecksums; j++) {
582: c = &checksums[j];
583: if (strcmp(c->file, argv[i]) == 0)
584: break;
585: }
586: if (j == nchecksums) {
587: failures[i] = 1;
588: continue;
589: }
590: }
591:
592: if (strcmp(c->algo, "SHA256") == 0) {
593: if (!SHA256File(c->file, buf)) {
594: failures[i] = 1;
595: continue;
596: }
597: } else if (strcmp(c->algo, "SHA512") == 0) {
598: if (!SHA512File(c->file, buf)) {
599: failures[i] = 1;
600: continue;
601: }
602: } else {
603: errx(1, "can't handle algorithm %s", c->algo);
604: }
605: if (strcmp(c->hash, buf) != 0) {
606: failures[i] = 1;
607: continue;
608: }
609: if (!quiet)
610: printf("%s: OK\n", c->file);
611: }
1.43 tedu 612: hasfailed = 0;
1.42 tedu 613: for (i = 0; i < count; i++) {
614: if (failures[i]) {
615: fprintf(stderr, "%s: FAIL\n",
616: uselist ? checksums[i].file : argv[i]);
1.43 tedu 617: hasfailed = 1;
1.42 tedu 618: }
619: }
1.43 tedu 620: if (hasfailed)
1.42 tedu 621: exit(1);
622: free(checksums);
1.43 tedu 623: free(failures);
1.42 tedu 624: }
625:
626: static void
627: check(const char *pubkeyfile, const char *sigfile, int quiet, int argc,
628: char **argv)
629: {
1.63 tedu 630: unsigned long long msglen;
1.42 tedu 631: uint8_t *msg;
632:
1.63 tedu 633: msg = verifyembedded(pubkeyfile, sigfile, quiet, &msglen);
1.45 tedu 634: verifychecksums((char *)msg, argc, argv, quiet);
1.42 tedu 635:
1.63 tedu 636: free(msg);
1.42 tedu 637: }
638: #endif
639:
1.1 tedu 640: int
641: main(int argc, char **argv)
642: {
1.16 tedu 643: const char *pubkeyfile = NULL, *seckeyfile = NULL, *msgfile = NULL,
1.1 tedu 644: *sigfile = NULL;
645: char sigfilebuf[1024];
1.27 tedu 646: const char *comment = "signify";
1.1 tedu 647: int ch, rounds;
1.16 tedu 648: int embedded = 0;
1.42 tedu 649: int quiet = 0;
1.6 tedu 650: enum {
651: NONE,
1.42 tedu 652: CHECK,
1.6 tedu 653: GENERATE,
1.22 tedu 654: INSPECT,
1.6 tedu 655: SIGN,
656: VERIFY
657: } verb = NONE;
658:
1.1 tedu 659:
660: rounds = 42;
661:
1.42 tedu 662: while ((ch = getopt(argc, argv, "CGISVc:em:np:qs:x:")) != -1) {
1.1 tedu 663: switch (ch) {
1.14 tedu 664: #ifndef VERIFYONLY
1.42 tedu 665: case 'C':
666: if (verb)
667: usage(NULL);
668: verb = CHECK;
669: break;
1.6 tedu 670: case 'G':
671: if (verb)
1.31 tedu 672: usage(NULL);
1.6 tedu 673: verb = GENERATE;
674: break;
1.22 tedu 675: case 'I':
676: if (verb)
1.31 tedu 677: usage(NULL);
1.22 tedu 678: verb = INSPECT;
679: break;
1.6 tedu 680: case 'S':
681: if (verb)
1.31 tedu 682: usage(NULL);
1.6 tedu 683: verb = SIGN;
684: break;
1.14 tedu 685: #endif
1.6 tedu 686: case 'V':
687: if (verb)
1.31 tedu 688: usage(NULL);
1.6 tedu 689: verb = VERIFY;
690: break;
1.27 tedu 691: case 'c':
692: comment = optarg;
693: break;
1.16 tedu 694: case 'e':
695: embedded = 1;
696: break;
1.31 tedu 697: case 'm':
698: msgfile = optarg;
699: break;
1.6 tedu 700: case 'n':
1.1 tedu 701: rounds = 0;
702: break;
1.6 tedu 703: case 'p':
1.1 tedu 704: pubkeyfile = optarg;
705: break;
1.42 tedu 706: case 'q':
707: quiet = 1;
708: break;
1.6 tedu 709: case 's':
1.1 tedu 710: seckeyfile = optarg;
711: break;
1.31 tedu 712: case 'x':
713: sigfile = optarg;
714: break;
1.1 tedu 715: default:
1.31 tedu 716: usage(NULL);
1.1 tedu 717: break;
718: }
719: }
1.2 tedu 720: argc -= optind;
1.9 espie 721: argv += optind;
722:
1.42 tedu 723: #ifndef VERIFYONLY
724: if (verb == CHECK) {
725: if (!pubkeyfile || !sigfile)
1.66 tedu 726: usage("must specify pubkey and sigfile");
1.42 tedu 727: check(pubkeyfile, sigfile, quiet, argc, argv);
728: return 0;
729: }
730: #endif
731:
1.31 tedu 732: if (argc != 0)
733: usage(NULL);
734:
1.36 tedu 735: if (!sigfile && msgfile) {
736: if (strcmp(msgfile, "-") == 0)
1.66 tedu 737: usage("must specify sigfile with - message");
1.36 tedu 738: if (snprintf(sigfilebuf, sizeof(sigfilebuf), "%s.sig",
739: msgfile) >= sizeof(sigfilebuf))
740: errx(1, "path too long");
741: sigfile = sigfilebuf;
742: }
1.1 tedu 743:
1.36 tedu 744: switch (verb) {
1.14 tedu 745: #ifndef VERIFYONLY
1.36 tedu 746: case GENERATE:
1.31 tedu 747: if (!pubkeyfile || !seckeyfile)
1.66 tedu 748: usage("must specify pubkey and seckey");
1.27 tedu 749: generate(pubkeyfile, seckeyfile, rounds, comment);
1.36 tedu 750: break;
751: case INSPECT:
1.22 tedu 752: inspect(seckeyfile, pubkeyfile, sigfile);
1.36 tedu 753: break;
754: case SIGN:
755: if (!msgfile || !seckeyfile)
1.66 tedu 756: usage("must specify message and seckey");
1.36 tedu 757: sign(seckeyfile, msgfile, sigfile, embedded);
758: break;
1.14 tedu 759: #endif
1.36 tedu 760: case VERIFY:
1.51 tedu 761: if (!msgfile)
1.66 tedu 762: usage("must specify message");
1.42 tedu 763: verify(pubkeyfile, msgfile, sigfile, embedded, quiet);
1.36 tedu 764: break;
765: default:
766: usage(NULL);
767: break;
1.1 tedu 768: }
1.9 espie 769:
1.1 tedu 770: return 0;
771: }
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