Annotation of src/usr.bin/openssl/passwd.c, Revision 1.12
1.12 ! tb 1: /* $OpenBSD: passwd.c,v 1.11 2021/11/25 16:53:58 tb Exp $ */
1.1 jsing 2:
3: #if defined OPENSSL_NO_MD5
4: #define NO_MD5CRYPT_1
5: #endif
6:
7: #if !defined(OPENSSL_NO_DES) || !defined(NO_MD5CRYPT_1)
8:
9: #include <assert.h>
10: #include <string.h>
11:
12: #include "apps.h"
13:
14: #include <openssl/bio.h>
15: #include <openssl/err.h>
16: #include <openssl/evp.h>
17:
18: #ifndef OPENSSL_NO_DES
19: #include <openssl/des.h>
20: #endif
21:
22: #ifndef NO_MD5CRYPT_1
23: #include <openssl/md5.h>
24: #endif
25:
26: static unsigned const char cov_2char[64] = {
27: /* from crypto/des/fcrypt.c */
28: 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35,
29: 0x36, 0x37, 0x38, 0x39, 0x41, 0x42, 0x43, 0x44,
30: 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C,
31: 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54,
32: 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x61, 0x62,
33: 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
34: 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72,
35: 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A
36: };
37:
38: static int
39: do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
40: char *passwd, BIO * out, int quiet, int table, int reverse,
41: size_t pw_maxlen, int usecrypt, int use1, int useapr1);
42:
1.3 jsing 43: static struct {
44: char *infile;
45: int in_stdin;
46: int noverify;
47: int quiet;
48: int reverse;
49: char *salt;
50: int table;
51: int use1;
52: int useapr1;
53: int usecrypt;
54: } passwd_config;
55:
1.10 guenther 56: static const struct option passwd_options[] = {
1.3 jsing 57: #ifndef NO_MD5CRYPT_1
58: {
59: .name = "1",
60: .desc = "Use MD5 based BSD password algorithm 1",
61: .type = OPTION_FLAG,
62: .opt.flag = &passwd_config.use1,
63: },
64: {
65: .name = "apr1",
66: .desc = "Use apr1 algorithm (Apache variant of BSD algorithm)",
67: .type = OPTION_FLAG,
68: .opt.flag = &passwd_config.useapr1,
69: },
70: #endif
71: #ifndef OPENSSL_NO_DES
72: {
73: .name = "crypt",
74: .desc = "Use crypt algorithm (default)",
75: .type = OPTION_FLAG,
76: .opt.flag = &passwd_config.usecrypt,
77: },
78: #endif
79: {
80: .name = "in",
81: .argname = "file",
82: .desc = "Read passwords from specified file",
83: .type = OPTION_ARG,
84: .opt.arg = &passwd_config.infile,
85: },
86: {
87: .name = "noverify",
88: .desc = "Do not verify password",
89: .type = OPTION_FLAG,
90: .opt.flag = &passwd_config.noverify,
91: },
92: {
93: .name = "quiet",
94: .desc = "Do not output warnings",
95: .type = OPTION_FLAG,
96: .opt.flag = &passwd_config.quiet,
97: },
98: {
99: .name = "reverse",
100: .desc = "Reverse table columns (requires -table)",
101: .type = OPTION_FLAG,
102: .opt.flag = &passwd_config.reverse,
103: },
104: {
105: .name = "salt",
106: .argname = "string",
107: .desc = "Use specified salt",
108: .type = OPTION_ARG,
109: .opt.arg = &passwd_config.salt,
110: },
111: {
112: .name = "stdin",
113: .desc = "Read passwords from stdin",
114: .type = OPTION_FLAG,
115: .opt.flag = &passwd_config.in_stdin,
116: },
117: {
118: .name = "table",
119: .desc = "Output cleartext and hashed passwords (tab separated)",
120: .type = OPTION_FLAG,
121: .opt.flag = &passwd_config.table,
122: },
123: { NULL },
124: };
125:
126: static void
127: passwd_usage(void)
128: {
129: fprintf(stderr, "usage: passwd [-1 | -apr1 | -crypt] [-in file] "
130: "[-noverify] [-quiet]\n"
131: " [-reverse] [-salt string] [-stdin] [-table] [password]\n\n");
132: options_usage(passwd_options);
133: }
1.1 jsing 134:
135: int
136: passwd_main(int argc, char **argv)
137: {
1.3 jsing 138: char *passwd = NULL, **passwds = NULL;
1.1 jsing 139: char *salt_malloc = NULL, *passwd_malloc = NULL;
140: size_t passwd_malloc_size = 0;
141: BIO *in = NULL, *out = NULL;
1.3 jsing 142: int badopt = 0;
143: int passed_salt = 0;
1.1 jsing 144: size_t pw_maxlen = 0;
1.3 jsing 145: int argsused;
146: int ret = 1;
1.5 doug 147:
148: if (single_execution) {
1.8 deraadt 149: if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
1.5 doug 150: perror("pledge");
1.7 doug 151: exit(1);
152: }
1.5 doug 153: }
1.1 jsing 154:
1.3 jsing 155: memset(&passwd_config, 0, sizeof(passwd_config));
156:
157: if (options_parse(argc, argv, passwd_options, NULL, &argsused) != 0) {
158: passwd_usage();
1.1 jsing 159: goto err;
1.3 jsing 160: }
1.1 jsing 161:
1.3 jsing 162: if (argsused < argc)
163: passwds = &argv[argsused];
164: if (passwd_config.salt != NULL)
165: passed_salt = 1;
166:
167: if (!passwd_config.usecrypt && !passwd_config.use1 &&
168: !passwd_config.useapr1)
169: passwd_config.usecrypt = 1; /* use default */
170: if (passwd_config.usecrypt + passwd_config.use1 +
171: passwd_config.useapr1 > 1)
172: badopt = 1; /* conflicting options */
1.1 jsing 173:
1.3 jsing 174: /* Reject unsupported algorithms */
1.1 jsing 175: #ifdef OPENSSL_NO_DES
1.3 jsing 176: if (passwd_config.usecrypt)
1.1 jsing 177: badopt = 1;
178: #endif
179: #ifdef NO_MD5CRYPT_1
1.3 jsing 180: if (passwd_config.use1 || passwd_config.useapr1)
1.1 jsing 181: badopt = 1;
182: #endif
183:
184: if (badopt) {
1.3 jsing 185: passwd_usage();
186: goto err;
187: }
1.1 jsing 188:
1.3 jsing 189: if ((out = BIO_new(BIO_s_file())) == NULL)
1.1 jsing 190: goto err;
1.3 jsing 191: BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
192:
193: if (passwd_config.infile != NULL || passwd_config.in_stdin) {
194: if ((in = BIO_new(BIO_s_file())) == NULL)
1.1 jsing 195: goto err;
1.3 jsing 196: if (passwd_config.infile != NULL) {
197: assert(passwd_config.in_stdin == 0);
198: if (BIO_read_filename(in, passwd_config.infile) <= 0)
1.1 jsing 199: goto err;
200: } else {
1.3 jsing 201: assert(passwd_config.in_stdin);
1.1 jsing 202: BIO_set_fp(in, stdin, BIO_NOCLOSE);
203: }
204: }
1.3 jsing 205: if (passwd_config.usecrypt)
1.1 jsing 206: pw_maxlen = 8;
1.3 jsing 207: else if (passwd_config.use1 || passwd_config.useapr1)
1.1 jsing 208: pw_maxlen = 256;/* arbitrary limit, should be enough for most
209: * passwords */
210:
211: if (passwds == NULL) {
212: /* no passwords on the command line */
213:
214: passwd_malloc_size = pw_maxlen + 2;
215: /* longer than necessary so that we can warn about truncation */
216: passwd = passwd_malloc = malloc(passwd_malloc_size);
217: if (passwd_malloc == NULL)
218: goto err;
219: }
1.3 jsing 220: if (in == NULL && passwds == NULL) {
1.1 jsing 221: /* build a null-terminated list */
222: static char *passwds_static[2] = {NULL, NULL};
223:
224: passwds = passwds_static;
225: if (in == NULL)
1.3 jsing 226: if (EVP_read_pw_string(passwd_malloc,
227: passwd_malloc_size, "Password: ",
228: !(passed_salt || passwd_config.noverify)) != 0)
1.1 jsing 229: goto err;
230: passwds[0] = passwd_malloc;
231: }
232: if (in == NULL) {
233: assert(passwds != NULL);
234: assert(*passwds != NULL);
235:
1.3 jsing 236: do { /* loop over list of passwords */
1.1 jsing 237: passwd = *passwds++;
1.3 jsing 238: if (!do_passwd(passed_salt, &passwd_config.salt,
239: &salt_malloc, passwd, out, passwd_config.quiet,
240: passwd_config.table, passwd_config.reverse,
241: pw_maxlen, passwd_config.usecrypt,
242: passwd_config.use1, passwd_config.useapr1))
1.1 jsing 243: goto err;
1.3 jsing 244: } while (*passwds != NULL);
245: } else {
1.1 jsing 246: int done;
247:
248: assert(passwd != NULL);
249: do {
250: int r = BIO_gets(in, passwd, pw_maxlen + 1);
251: if (r > 0) {
252: char *c = (strchr(passwd, '\n'));
253: if (c != NULL)
254: *c = 0; /* truncate at newline */
255: else {
256: /* ignore rest of line */
257: char trash[BUFSIZ];
258: do
259: r = BIO_gets(in, trash, sizeof trash);
260: while ((r > 0) && (!strchr(trash, '\n')));
261: }
262:
1.3 jsing 263: if (!do_passwd(passed_salt, &passwd_config.salt,
264: &salt_malloc, passwd, out,
265: passwd_config.quiet, passwd_config.table,
266: passwd_config.reverse, pw_maxlen,
267: passwd_config.usecrypt, passwd_config.use1,
268: passwd_config.useapr1))
1.1 jsing 269: goto err;
270: }
271: done = (r <= 0);
1.3 jsing 272: } while (!done);
1.1 jsing 273: }
274: ret = 0;
275:
1.9 jsing 276: err:
1.1 jsing 277: ERR_print_errors(bio_err);
1.3 jsing 278:
1.1 jsing 279: free(salt_malloc);
280: free(passwd_malloc);
1.3 jsing 281:
1.1 jsing 282: BIO_free(in);
1.3 jsing 283: BIO_free_all(out);
1.1 jsing 284:
285: return (ret);
286: }
287:
288:
289: #ifndef NO_MD5CRYPT_1
290: /* MD5-based password algorithm (should probably be available as a library
291: * function; then the static buffer would not be acceptable).
292: * For magic string "1", this should be compatible to the MD5-based BSD
293: * password algorithm.
294: * For 'magic' string "apr1", this is compatible to the MD5-based Apache
295: * password algorithm.
296: * (Apparently, the Apache password algorithm is identical except that the
297: * 'magic' string was changed -- the laziest application of the NIH principle
298: * I've ever encountered.)
299: */
300: static char *
301: md5crypt(const char *passwd, const char *magic, const char *salt)
302: {
303: static char out_buf[6 + 9 + 24 + 2]; /* "$apr1$..salt..$.......md5h
304: * ash..........\0" */
305: unsigned char buf[MD5_DIGEST_LENGTH];
306: char *salt_out;
307: int n;
308: unsigned int i;
1.12 ! tb 309: EVP_MD_CTX *md = NULL, *md2 = NULL;
1.1 jsing 310: size_t passwd_len, salt_len;
311:
312: passwd_len = strlen(passwd);
313: out_buf[0] = '$';
314: out_buf[1] = 0;
315: assert(strlen(magic) <= 4); /* "1" or "apr1" */
316: strlcat(out_buf, magic, sizeof(out_buf));
317: strlcat(out_buf, "$", sizeof(out_buf));
318: strlcat(out_buf, salt, sizeof(out_buf));
319: assert(strlen(out_buf) <= 6 + 8); /* "$apr1$..salt.." */
320: salt_out = out_buf + 2 + strlen(magic);
321: salt_len = strlen(salt_out);
322: assert(salt_len <= 8);
323:
1.12 ! tb 324: if ((md = EVP_MD_CTX_new()) == NULL)
! 325: goto err;
! 326: if (!EVP_DigestInit_ex(md, EVP_md5(), NULL))
! 327: goto err;
! 328: if (!EVP_DigestUpdate(md, passwd, passwd_len))
! 329: goto err;
! 330: if (!EVP_DigestUpdate(md, "$", 1))
! 331: goto err;
! 332: if (!EVP_DigestUpdate(md, magic, strlen(magic)))
! 333: goto err;
! 334: if (!EVP_DigestUpdate(md, "$", 1))
! 335: goto err;
! 336: if (!EVP_DigestUpdate(md, salt_out, salt_len))
! 337: goto err;
! 338:
! 339: if ((md2 = EVP_MD_CTX_new()) == NULL)
! 340: goto err;
! 341: if (!EVP_DigestInit_ex(md2, EVP_md5(), NULL))
! 342: goto err;
! 343: if (!EVP_DigestUpdate(md2, passwd, passwd_len))
! 344: goto err;
! 345: if (!EVP_DigestUpdate(md2, salt_out, salt_len))
! 346: goto err;
! 347: if (!EVP_DigestUpdate(md2, passwd, passwd_len))
! 348: goto err;
! 349: if (!EVP_DigestFinal_ex(md2, buf, NULL))
! 350: goto err;
! 351:
! 352: for (i = passwd_len; i > sizeof buf; i -= sizeof buf) {
! 353: if (!EVP_DigestUpdate(md, buf, sizeof buf))
! 354: goto err;
! 355: }
! 356: if (!EVP_DigestUpdate(md, buf, i))
! 357: goto err;
1.1 jsing 358:
359: n = passwd_len;
360: while (n) {
1.12 ! tb 361: if (!EVP_DigestUpdate(md, (n & 1) ? "\0" : passwd, 1))
! 362: goto err;
1.1 jsing 363: n >>= 1;
364: }
1.12 ! tb 365: if (!EVP_DigestFinal_ex(md, buf, NULL))
! 366: goto err;
1.1 jsing 367:
368: for (i = 0; i < 1000; i++) {
1.12 ! tb 369: if (!EVP_DigestInit_ex(md2, EVP_md5(), NULL))
! 370: goto err;
! 371: if (!EVP_DigestUpdate(md2,
! 372: (i & 1) ? (unsigned const char *) passwd : buf,
! 373: (i & 1) ? passwd_len : sizeof buf))
! 374: goto err;
! 375: if (i % 3) {
! 376: if (!EVP_DigestUpdate(md2, salt_out, salt_len))
! 377: goto err;
! 378: }
! 379: if (i % 7) {
! 380: if (!EVP_DigestUpdate(md2, passwd, passwd_len))
! 381: goto err;
! 382: }
! 383: if (!EVP_DigestUpdate(md2,
! 384: (i & 1) ? buf : (unsigned const char *) passwd,
! 385: (i & 1) ? sizeof buf : passwd_len))
! 386: goto err;
! 387: if (!EVP_DigestFinal_ex(md2, buf, NULL))
! 388: goto err;
1.1 jsing 389: }
1.12 ! tb 390: EVP_MD_CTX_free(md2);
! 391: md2 = NULL;
1.1 jsing 392:
393: {
394: /* transform buf into output string */
395:
396: unsigned char buf_perm[sizeof buf];
397: int dest, source;
398: char *output;
399:
400: /* silly output permutation */
401: for (dest = 0, source = 0; dest < 14; dest++, source = (source + 6) % 17)
402: buf_perm[dest] = buf[source];
403: buf_perm[14] = buf[5];
404: buf_perm[15] = buf[11];
405: assert(16 == sizeof buf_perm);
406:
407: output = salt_out + salt_len;
408: assert(output == out_buf + strlen(out_buf));
409:
410: *output++ = '$';
411:
412: for (i = 0; i < 15; i += 3) {
413: *output++ = cov_2char[buf_perm[i + 2] & 0x3f];
414: *output++ = cov_2char[((buf_perm[i + 1] & 0xf) << 2) |
415: (buf_perm[i + 2] >> 6)];
416: *output++ = cov_2char[((buf_perm[i] & 3) << 4) |
417: (buf_perm[i + 1] >> 4)];
418: *output++ = cov_2char[buf_perm[i] >> 2];
419: }
420: assert(i == 15);
421: *output++ = cov_2char[buf_perm[i] & 0x3f];
422: *output++ = cov_2char[buf_perm[i] >> 6];
423: *output = 0;
424: assert(strlen(out_buf) < sizeof(out_buf));
425: }
1.12 ! tb 426: EVP_MD_CTX_free(md);
1.1 jsing 427:
428: return out_buf;
1.12 ! tb 429: err:
! 430: EVP_MD_CTX_free(md);
! 431: EVP_MD_CTX_free(md2);
! 432:
! 433: return NULL;
1.1 jsing 434: }
435: #endif
436:
437:
438: static int
439: do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
440: char *passwd, BIO * out, int quiet, int table, int reverse,
441: size_t pw_maxlen, int usecrypt, int use1, int useapr1)
442: {
443: char *hash = NULL;
444:
445: assert(salt_p != NULL);
446: assert(salt_malloc_p != NULL);
447:
448: /* first make sure we have a salt */
449: if (!passed_salt) {
450: #ifndef OPENSSL_NO_DES
451: if (usecrypt) {
452: if (*salt_malloc_p == NULL) {
453: *salt_p = *salt_malloc_p = malloc(3);
454: if (*salt_malloc_p == NULL)
455: goto err;
456: }
1.2 jsing 457: arc4random_buf(*salt_p, 2);
1.1 jsing 458: (*salt_p)[0] = cov_2char[(*salt_p)[0] & 0x3f]; /* 6 bits */
459: (*salt_p)[1] = cov_2char[(*salt_p)[1] & 0x3f]; /* 6 bits */
460: (*salt_p)[2] = 0;
461: }
462: #endif /* !OPENSSL_NO_DES */
463:
464: #ifndef NO_MD5CRYPT_1
465: if (use1 || useapr1) {
466: int i;
467:
468: if (*salt_malloc_p == NULL) {
469: *salt_p = *salt_malloc_p = malloc(9);
470: if (*salt_malloc_p == NULL)
471: goto err;
472: }
1.2 jsing 473: arc4random_buf(*salt_p, 8);
1.1 jsing 474:
475: for (i = 0; i < 8; i++)
476: (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */
477: (*salt_p)[8] = 0;
478: }
479: #endif /* !NO_MD5CRYPT_1 */
480: }
481: assert(*salt_p != NULL);
482:
483: /* truncate password if necessary */
484: if ((strlen(passwd) > pw_maxlen)) {
485: if (!quiet)
1.11 tb 486: BIO_printf(bio_err,
487: "Warning: truncating password to %zu characters\n",
488: pw_maxlen);
1.1 jsing 489: passwd[pw_maxlen] = 0;
490: }
491: assert(strlen(passwd) <= pw_maxlen);
492:
493: /* now compute password hash */
494: #ifndef OPENSSL_NO_DES
495: if (usecrypt)
496: hash = DES_crypt(passwd, *salt_p);
497: #endif
498: #ifndef NO_MD5CRYPT_1
499: if (use1 || useapr1)
1.12 ! tb 500: if ((hash = md5crypt(passwd, (use1 ? "1" : "apr1"), *salt_p)) == NULL)
! 501: goto err;
1.1 jsing 502: #endif
503: assert(hash != NULL);
504:
505: if (table && !reverse)
506: BIO_printf(out, "%s\t%s\n", passwd, hash);
507: else if (table && reverse)
508: BIO_printf(out, "%s\t%s\n", hash, passwd);
509: else
510: BIO_printf(out, "%s\n", hash);
511: return 1;
512:
1.9 jsing 513: err:
1.12 ! tb 514: free(*salt_malloc_p);
! 515: *salt_malloc_p = NULL;
1.1 jsing 516: return 0;
517: }
518: #else
519:
520: int
521: passwd_main(int argc, char **argv)
522: {
523: fputs("Program not available.\n", stderr)
524: return (1);
525: }
526: #endif
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