1 /*
2 * Copyright 2000-2024 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include <string.h>
11
12 #include "apps.h"
13 #include "progs.h"
14
15 #include <openssl/bio.h>
16 #include <openssl/err.h>
17 #include <openssl/evp.h>
18 #include <openssl/rand.h>
19 #if !defined(OPENSSL_NO_DES) && !defined(OPENSSL_NO_DEPRECATED_3_0)
20 # include <openssl/des.h>
21 #endif
22 #include <openssl/md5.h>
23 #include <openssl/sha.h>
24
25 static const unsigned char cov_2char[64] = {
26 /* from crypto/des/fcrypt.c */
27 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35,
28 0x36, 0x37, 0x38, 0x39, 0x41, 0x42, 0x43, 0x44,
29 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C,
30 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54,
31 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x61, 0x62,
32 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
33 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72,
34 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A
35 };
36
37 static const char ascii_dollar[] = { 0x24, 0x00 };
38
39 typedef enum {
40 passwd_unset = 0,
41 passwd_md5,
42 passwd_apr1,
43 passwd_sha256,
44 passwd_sha512,
45 passwd_aixmd5
46 } passwd_modes;
47
48 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
49 char *passwd, BIO *out, int quiet, int table,
50 int reverse, size_t pw_maxlen, passwd_modes mode);
51
52 typedef enum OPTION_choice {
53 OPT_COMMON,
54 OPT_IN,
55 OPT_NOVERIFY, OPT_QUIET, OPT_TABLE, OPT_REVERSE, OPT_APR1,
56 OPT_1, OPT_5, OPT_6, OPT_AIXMD5, OPT_SALT, OPT_STDIN,
57 OPT_R_ENUM, OPT_PROV_ENUM
58 } OPTION_CHOICE;
59
60 const OPTIONS passwd_options[] = {
61 {OPT_HELP_STR, 1, '-', "Usage: %s [options] [password]\n"},
62
63 OPT_SECTION("General"),
64 {"help", OPT_HELP, '-', "Display this summary"},
65
66 OPT_SECTION("Input"),
67 {"in", OPT_IN, '<', "Read passwords from file"},
68 {"noverify", OPT_NOVERIFY, '-',
69 "Never verify when reading password from terminal"},
70 {"stdin", OPT_STDIN, '-', "Read passwords from stdin"},
71
72 OPT_SECTION("Output"),
73 {"quiet", OPT_QUIET, '-', "No warnings"},
74 {"table", OPT_TABLE, '-', "Format output as table"},
75 {"reverse", OPT_REVERSE, '-', "Switch table columns"},
76
77 OPT_SECTION("Cryptographic"),
78 {"salt", OPT_SALT, 's', "Use provided salt"},
79 {"6", OPT_6, '-', "SHA512-based password algorithm"},
80 {"5", OPT_5, '-', "SHA256-based password algorithm"},
81 {"apr1", OPT_APR1, '-', "MD5-based password algorithm, Apache variant"},
82 {"1", OPT_1, '-', "MD5-based password algorithm"},
83 {"aixmd5", OPT_AIXMD5, '-', "AIX MD5-based password algorithm"},
84
85 OPT_R_OPTIONS,
86 OPT_PROV_OPTIONS,
87
88 OPT_PARAMETERS(),
89 {"password", 0, 0, "Password text to digest (optional)"},
90 {NULL}
91 };
92
passwd_main(int argc,char ** argv)93 int passwd_main(int argc, char **argv)
94 {
95 BIO *in = NULL;
96 char *infile = NULL, *salt = NULL, *passwd = NULL, **passwds = NULL;
97 char *salt_malloc = NULL, *passwd_malloc = NULL, *prog;
98 OPTION_CHOICE o;
99 int in_stdin = 0, pw_source_defined = 0;
100 #ifndef OPENSSL_NO_UI_CONSOLE
101 int in_noverify = 0;
102 #endif
103 int passed_salt = 0, quiet = 0, table = 0, reverse = 0;
104 int ret = 1;
105 passwd_modes mode = passwd_unset;
106 size_t passwd_malloc_size = 0;
107 size_t pw_maxlen = 256; /* arbitrary limit, should be enough for most
108 * passwords */
109
110 prog = opt_init(argc, argv, passwd_options);
111 while ((o = opt_next()) != OPT_EOF) {
112 switch (o) {
113 case OPT_EOF:
114 case OPT_ERR:
115 opthelp:
116 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
117 goto end;
118 case OPT_HELP:
119 opt_help(passwd_options);
120 ret = 0;
121 goto end;
122 case OPT_IN:
123 if (pw_source_defined)
124 goto opthelp;
125 infile = opt_arg();
126 pw_source_defined = 1;
127 break;
128 case OPT_NOVERIFY:
129 #ifndef OPENSSL_NO_UI_CONSOLE
130 in_noverify = 1;
131 #endif
132 break;
133 case OPT_QUIET:
134 quiet = 1;
135 break;
136 case OPT_TABLE:
137 table = 1;
138 break;
139 case OPT_REVERSE:
140 reverse = 1;
141 break;
142 case OPT_1:
143 if (mode != passwd_unset)
144 goto opthelp;
145 mode = passwd_md5;
146 break;
147 case OPT_5:
148 if (mode != passwd_unset)
149 goto opthelp;
150 mode = passwd_sha256;
151 break;
152 case OPT_6:
153 if (mode != passwd_unset)
154 goto opthelp;
155 mode = passwd_sha512;
156 break;
157 case OPT_APR1:
158 if (mode != passwd_unset)
159 goto opthelp;
160 mode = passwd_apr1;
161 break;
162 case OPT_AIXMD5:
163 if (mode != passwd_unset)
164 goto opthelp;
165 mode = passwd_aixmd5;
166 break;
167 case OPT_SALT:
168 passed_salt = 1;
169 salt = opt_arg();
170 break;
171 case OPT_STDIN:
172 if (pw_source_defined)
173 goto opthelp;
174 in_stdin = 1;
175 pw_source_defined = 1;
176 break;
177 case OPT_R_CASES:
178 if (!opt_rand(o))
179 goto end;
180 break;
181 case OPT_PROV_CASES:
182 if (!opt_provider(o))
183 goto end;
184 break;
185 }
186 }
187
188 /* All remaining arguments are the password text */
189 argc = opt_num_rest();
190 argv = opt_rest();
191 if (*argv != NULL) {
192 if (pw_source_defined)
193 goto opthelp;
194 pw_source_defined = 1;
195 passwds = argv;
196 }
197
198 if (!app_RAND_load())
199 goto end;
200
201 if (mode == passwd_unset) {
202 /* use default */
203 mode = passwd_md5;
204 }
205
206 if (infile != NULL && in_stdin) {
207 BIO_printf(bio_err, "%s: Can't combine -in and -stdin\n", prog);
208 goto end;
209 }
210
211 if (infile != NULL || in_stdin) {
212 /*
213 * If in_stdin is true, we know that infile is NULL, and that
214 * bio_open_default() will give us back an alias for stdin.
215 */
216 in = bio_open_default(infile, 'r', FORMAT_TEXT);
217 if (in == NULL)
218 goto end;
219 }
220
221 if (passwds == NULL) {
222 /* no passwords on the command line */
223
224 passwd_malloc_size = pw_maxlen + 2;
225 /* longer than necessary so that we can warn about truncation */
226 passwd = passwd_malloc =
227 app_malloc(passwd_malloc_size, "password buffer");
228 }
229
230 if ((in == NULL) && (passwds == NULL)) {
231 /*
232 * we use the following method to make sure what
233 * in the 'else' section is always compiled, to
234 * avoid rot of not-frequently-used code.
235 */
236 if (1) {
237 #ifndef OPENSSL_NO_UI_CONSOLE
238 /* build a null-terminated list */
239 static char *passwds_static[2] = { NULL, NULL };
240
241 passwds = passwds_static;
242 if (in == NULL) {
243 if (EVP_read_pw_string
244 (passwd_malloc, passwd_malloc_size, "Password: ",
245 !(passed_salt || in_noverify)) != 0)
246 goto end;
247 }
248 passwds[0] = passwd_malloc;
249 } else {
250 #endif
251 BIO_printf(bio_err, "password required\n");
252 goto end;
253 }
254 }
255
256 if (in == NULL) {
257 assert(passwds != NULL);
258 assert(*passwds != NULL);
259
260 do { /* loop over list of passwords */
261 passwd = *passwds++;
262 if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, bio_out,
263 quiet, table, reverse, pw_maxlen, mode))
264 goto end;
265 } while (*passwds != NULL);
266 } else {
267 /* in != NULL */
268 int done;
269
270 assert(passwd != NULL);
271 do {
272 int r = BIO_gets(in, passwd, pw_maxlen + 1);
273 if (r > 0) {
274 char *c = (strchr(passwd, '\n'));
275 if (c != NULL) {
276 *c = 0; /* truncate at newline */
277 } else {
278 /* ignore rest of line */
279 char trash[BUFSIZ];
280 do
281 r = BIO_gets(in, trash, sizeof(trash));
282 while ((r > 0) && (!strchr(trash, '\n')));
283 }
284
285 if (!do_passwd
286 (passed_salt, &salt, &salt_malloc, passwd, bio_out, quiet,
287 table, reverse, pw_maxlen, mode))
288 goto end;
289 }
290 done = (r <= 0);
291 } while (!done);
292 }
293 ret = 0;
294
295 end:
296 #if 0
297 ERR_print_errors(bio_err);
298 #endif
299 OPENSSL_free(salt_malloc);
300 OPENSSL_free(passwd_malloc);
301 BIO_free(in);
302 return ret;
303 }
304
305 /*
306 * MD5-based password algorithm (should probably be available as a library
307 * function; then the static buffer would not be acceptable). For magic
308 * string "1", this should be compatible to the MD5-based BSD password
309 * algorithm. For 'magic' string "apr1", this is compatible to the MD5-based
310 * Apache password algorithm. (Apparently, the Apache password algorithm is
311 * identical except that the 'magic' string was changed -- the laziest
312 * application of the NIH principle I've ever encountered.)
313 */
md5crypt(const char * passwd,const char * magic,const char * salt)314 static char *md5crypt(const char *passwd, const char *magic, const char *salt)
315 {
316 /* "$apr1$..salt..$.......md5hash..........\0" */
317 static char out_buf[6 + 9 + 24 + 2];
318 unsigned char buf[MD5_DIGEST_LENGTH];
319 char ascii_magic[5]; /* "apr1" plus '\0' */
320 char ascii_salt[9]; /* Max 8 chars plus '\0' */
321 char *ascii_passwd = NULL;
322 char *salt_out;
323 int n;
324 unsigned int i;
325 EVP_MD_CTX *md = NULL, *md2 = NULL;
326 size_t passwd_len, salt_len, magic_len;
327
328 passwd_len = strlen(passwd);
329
330 out_buf[0] = 0;
331 magic_len = strlen(magic);
332 OPENSSL_strlcpy(ascii_magic, magic, sizeof(ascii_magic));
333 #ifdef CHARSET_EBCDIC
334 if ((magic[0] & 0x80) != 0) /* High bit is 1 in EBCDIC alnums */
335 ebcdic2ascii(ascii_magic, ascii_magic, magic_len);
336 #endif
337
338 /* The salt gets truncated to 8 chars */
339 OPENSSL_strlcpy(ascii_salt, salt, sizeof(ascii_salt));
340 salt_len = strlen(ascii_salt);
341 #ifdef CHARSET_EBCDIC
342 ebcdic2ascii(ascii_salt, ascii_salt, salt_len);
343 #endif
344
345 #ifdef CHARSET_EBCDIC
346 ascii_passwd = OPENSSL_strdup(passwd);
347 if (ascii_passwd == NULL)
348 return NULL;
349 ebcdic2ascii(ascii_passwd, ascii_passwd, passwd_len);
350 passwd = ascii_passwd;
351 #endif
352
353 if (magic_len > 0) {
354 OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf));
355
356 if (magic_len > 4) /* assert it's "1" or "apr1" */
357 goto err;
358
359 OPENSSL_strlcat(out_buf, ascii_magic, sizeof(out_buf));
360 OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf));
361 }
362
363 OPENSSL_strlcat(out_buf, ascii_salt, sizeof(out_buf));
364
365 if (strlen(out_buf) > 6 + 8) /* assert "$apr1$..salt.." */
366 goto err;
367
368 salt_out = out_buf;
369 if (magic_len > 0)
370 salt_out += 2 + magic_len;
371
372 if (salt_len > 8)
373 goto err;
374
375 md = EVP_MD_CTX_new();
376 if (md == NULL
377 || !EVP_DigestInit_ex(md, EVP_md5(), NULL)
378 || !EVP_DigestUpdate(md, passwd, passwd_len))
379 goto err;
380
381 if (magic_len > 0)
382 if (!EVP_DigestUpdate(md, ascii_dollar, 1)
383 || !EVP_DigestUpdate(md, ascii_magic, magic_len)
384 || !EVP_DigestUpdate(md, ascii_dollar, 1))
385 goto err;
386
387 if (!EVP_DigestUpdate(md, ascii_salt, salt_len))
388 goto err;
389
390 md2 = EVP_MD_CTX_new();
391 if (md2 == NULL
392 || !EVP_DigestInit_ex(md2, EVP_md5(), NULL)
393 || !EVP_DigestUpdate(md2, passwd, passwd_len)
394 || !EVP_DigestUpdate(md2, ascii_salt, salt_len)
395 || !EVP_DigestUpdate(md2, passwd, passwd_len)
396 || !EVP_DigestFinal_ex(md2, buf, NULL))
397 goto err;
398
399 for (i = passwd_len; i > sizeof(buf); i -= sizeof(buf)) {
400 if (!EVP_DigestUpdate(md, buf, sizeof(buf)))
401 goto err;
402 }
403 if (!EVP_DigestUpdate(md, buf, i))
404 goto err;
405
406 n = passwd_len;
407 while (n) {
408 if (!EVP_DigestUpdate(md, (n & 1) ? "\0" : passwd, 1))
409 goto err;
410 n >>= 1;
411 }
412 if (!EVP_DigestFinal_ex(md, buf, NULL))
413 goto err;
414
415 for (i = 0; i < 1000; i++) {
416 if (!EVP_DigestInit_ex(md2, EVP_md5(), NULL))
417 goto err;
418 if (!EVP_DigestUpdate(md2,
419 (i & 1) ? (const unsigned char *)passwd : buf,
420 (i & 1) ? passwd_len : sizeof(buf)))
421 goto err;
422 if (i % 3) {
423 if (!EVP_DigestUpdate(md2, ascii_salt, salt_len))
424 goto err;
425 }
426 if (i % 7) {
427 if (!EVP_DigestUpdate(md2, passwd, passwd_len))
428 goto err;
429 }
430 if (!EVP_DigestUpdate(md2,
431 (i & 1) ? buf : (const unsigned char *)passwd,
432 (i & 1) ? sizeof(buf) : passwd_len))
433 goto err;
434 if (!EVP_DigestFinal_ex(md2, buf, NULL))
435 goto err;
436 }
437 EVP_MD_CTX_free(md2);
438 EVP_MD_CTX_free(md);
439 md2 = NULL;
440 md = NULL;
441
442 {
443 /* transform buf into output string */
444 unsigned char buf_perm[sizeof(buf)];
445 int dest, source;
446 char *output;
447
448 /* silly output permutation */
449 for (dest = 0, source = 0; dest < 14;
450 dest++, source = (source + 6) % 17)
451 buf_perm[dest] = buf[source];
452 buf_perm[14] = buf[5];
453 buf_perm[15] = buf[11];
454 # ifndef PEDANTIC /* Unfortunately, this generates a "no
455 * effect" warning */
456 assert(16 == sizeof(buf_perm));
457 # endif
458
459 output = salt_out + salt_len;
460 assert(output == out_buf + strlen(out_buf));
461
462 *output++ = ascii_dollar[0];
463
464 for (i = 0; i < 15; i += 3) {
465 *output++ = cov_2char[buf_perm[i + 2] & 0x3f];
466 *output++ = cov_2char[((buf_perm[i + 1] & 0xf) << 2) |
467 (buf_perm[i + 2] >> 6)];
468 *output++ = cov_2char[((buf_perm[i] & 3) << 4) |
469 (buf_perm[i + 1] >> 4)];
470 *output++ = cov_2char[buf_perm[i] >> 2];
471 }
472 assert(i == 15);
473 *output++ = cov_2char[buf_perm[i] & 0x3f];
474 *output++ = cov_2char[buf_perm[i] >> 6];
475 *output = 0;
476 assert(strlen(out_buf) < sizeof(out_buf));
477 #ifdef CHARSET_EBCDIC
478 ascii2ebcdic(out_buf, out_buf, strlen(out_buf));
479 #endif
480 }
481
482 return out_buf;
483
484 err:
485 OPENSSL_free(ascii_passwd);
486 EVP_MD_CTX_free(md2);
487 EVP_MD_CTX_free(md);
488 return NULL;
489 }
490
491 /*
492 * SHA based password algorithm, describe by Ulrich Drepper here:
493 * https://www.akkadia.org/drepper/SHA-crypt.txt
494 * (note that it's in the public domain)
495 */
shacrypt(const char * passwd,const char * magic,const char * salt)496 static char *shacrypt(const char *passwd, const char *magic, const char *salt)
497 {
498 /* Prefix for optional rounds specification. */
499 static const char rounds_prefix[] = "rounds=";
500 /* Maximum salt string length. */
501 # define SALT_LEN_MAX 16
502 /* Default number of rounds if not explicitly specified. */
503 # define ROUNDS_DEFAULT 5000
504 /* Minimum number of rounds. */
505 # define ROUNDS_MIN 1000
506 /* Maximum number of rounds. */
507 # define ROUNDS_MAX 999999999
508
509 /* "$6$rounds=<N>$......salt......$...shahash(up to 86 chars)...\0" */
510 static char out_buf[3 + 17 + 17 + 86 + 1];
511 unsigned char buf[SHA512_DIGEST_LENGTH];
512 unsigned char temp_buf[SHA512_DIGEST_LENGTH];
513 size_t buf_size = 0;
514 char ascii_magic[2];
515 char ascii_salt[17]; /* Max 16 chars plus '\0' */
516 char *ascii_passwd = NULL;
517 size_t n;
518 EVP_MD_CTX *md = NULL, *md2 = NULL;
519 const EVP_MD *sha = NULL;
520 size_t passwd_len, salt_len, magic_len;
521 unsigned int rounds = ROUNDS_DEFAULT; /* Default */
522 char rounds_custom = 0;
523 char *p_bytes = NULL;
524 char *s_bytes = NULL;
525 char *cp = NULL;
526
527 passwd_len = strlen(passwd);
528 magic_len = strlen(magic);
529
530 /* assert it's "5" or "6" */
531 if (magic_len != 1)
532 return NULL;
533
534 switch (magic[0]) {
535 case '5':
536 sha = EVP_sha256();
537 buf_size = 32;
538 break;
539 case '6':
540 sha = EVP_sha512();
541 buf_size = 64;
542 break;
543 default:
544 return NULL;
545 }
546
547 if (strncmp(salt, rounds_prefix, sizeof(rounds_prefix) - 1) == 0) {
548 const char *num = salt + sizeof(rounds_prefix) - 1;
549 char *endp;
550 unsigned long int srounds = strtoul (num, &endp, 10);
551 if (*endp == '$') {
552 salt = endp + 1;
553 if (srounds > ROUNDS_MAX)
554 rounds = ROUNDS_MAX;
555 else if (srounds < ROUNDS_MIN)
556 rounds = ROUNDS_MIN;
557 else
558 rounds = (unsigned int)srounds;
559 rounds_custom = 1;
560 } else {
561 return NULL;
562 }
563 }
564
565 OPENSSL_strlcpy(ascii_magic, magic, sizeof(ascii_magic));
566 #ifdef CHARSET_EBCDIC
567 if ((magic[0] & 0x80) != 0) /* High bit is 1 in EBCDIC alnums */
568 ebcdic2ascii(ascii_magic, ascii_magic, magic_len);
569 #endif
570
571 /* The salt gets truncated to 16 chars */
572 OPENSSL_strlcpy(ascii_salt, salt, sizeof(ascii_salt));
573 salt_len = strlen(ascii_salt);
574 #ifdef CHARSET_EBCDIC
575 ebcdic2ascii(ascii_salt, ascii_salt, salt_len);
576 #endif
577
578 #ifdef CHARSET_EBCDIC
579 ascii_passwd = OPENSSL_strdup(passwd);
580 if (ascii_passwd == NULL)
581 return NULL;
582 ebcdic2ascii(ascii_passwd, ascii_passwd, passwd_len);
583 passwd = ascii_passwd;
584 #endif
585
586 out_buf[0] = 0;
587 OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf));
588 OPENSSL_strlcat(out_buf, ascii_magic, sizeof(out_buf));
589 OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf));
590 if (rounds_custom) {
591 char tmp_buf[80]; /* "rounds=999999999" */
592
593 BIO_snprintf(tmp_buf, sizeof(tmp_buf), "rounds=%u", rounds);
594 #ifdef CHARSET_EBCDIC
595 /* In case we're really on a ASCII based platform and just pretend */
596 if (tmp_buf[0] != 0x72) /* ASCII 'r' */
597 ebcdic2ascii(tmp_buf, tmp_buf, strlen(tmp_buf));
598 #endif
599 OPENSSL_strlcat(out_buf, tmp_buf, sizeof(out_buf));
600 OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf));
601 }
602 OPENSSL_strlcat(out_buf, ascii_salt, sizeof(out_buf));
603
604 /* assert "$5$rounds=999999999$......salt......" */
605 if (strlen(out_buf) > 3 + 17 * rounds_custom + salt_len)
606 goto err;
607
608 md = EVP_MD_CTX_new();
609 if (md == NULL
610 || !EVP_DigestInit_ex(md, sha, NULL)
611 || !EVP_DigestUpdate(md, passwd, passwd_len)
612 || !EVP_DigestUpdate(md, ascii_salt, salt_len))
613 goto err;
614
615 md2 = EVP_MD_CTX_new();
616 if (md2 == NULL
617 || !EVP_DigestInit_ex(md2, sha, NULL)
618 || !EVP_DigestUpdate(md2, passwd, passwd_len)
619 || !EVP_DigestUpdate(md2, ascii_salt, salt_len)
620 || !EVP_DigestUpdate(md2, passwd, passwd_len)
621 || !EVP_DigestFinal_ex(md2, buf, NULL))
622 goto err;
623
624 for (n = passwd_len; n > buf_size; n -= buf_size) {
625 if (!EVP_DigestUpdate(md, buf, buf_size))
626 goto err;
627 }
628 if (!EVP_DigestUpdate(md, buf, n))
629 goto err;
630
631 n = passwd_len;
632 while (n) {
633 if (!EVP_DigestUpdate(md,
634 (n & 1) ? buf : (const unsigned char *)passwd,
635 (n & 1) ? buf_size : passwd_len))
636 goto err;
637 n >>= 1;
638 }
639 if (!EVP_DigestFinal_ex(md, buf, NULL))
640 goto err;
641
642 /* P sequence */
643 if (!EVP_DigestInit_ex(md2, sha, NULL))
644 goto err;
645
646 for (n = passwd_len; n > 0; n--)
647 if (!EVP_DigestUpdate(md2, passwd, passwd_len))
648 goto err;
649
650 if (!EVP_DigestFinal_ex(md2, temp_buf, NULL))
651 goto err;
652
653 if ((p_bytes = OPENSSL_zalloc(passwd_len)) == NULL)
654 goto err;
655 for (cp = p_bytes, n = passwd_len; n > buf_size; n -= buf_size, cp += buf_size)
656 memcpy(cp, temp_buf, buf_size);
657 memcpy(cp, temp_buf, n);
658
659 /* S sequence */
660 if (!EVP_DigestInit_ex(md2, sha, NULL))
661 goto err;
662
663 for (n = 16 + buf[0]; n > 0; n--)
664 if (!EVP_DigestUpdate(md2, ascii_salt, salt_len))
665 goto err;
666
667 if (!EVP_DigestFinal_ex(md2, temp_buf, NULL))
668 goto err;
669
670 if ((s_bytes = OPENSSL_zalloc(salt_len)) == NULL)
671 goto err;
672 for (cp = s_bytes, n = salt_len; n > buf_size; n -= buf_size, cp += buf_size)
673 memcpy(cp, temp_buf, buf_size);
674 memcpy(cp, temp_buf, n);
675
676 for (n = 0; n < rounds; n++) {
677 if (!EVP_DigestInit_ex(md2, sha, NULL))
678 goto err;
679 if (!EVP_DigestUpdate(md2,
680 (n & 1) ? (const unsigned char *)p_bytes : buf,
681 (n & 1) ? passwd_len : buf_size))
682 goto err;
683 if (n % 3) {
684 if (!EVP_DigestUpdate(md2, s_bytes, salt_len))
685 goto err;
686 }
687 if (n % 7) {
688 if (!EVP_DigestUpdate(md2, p_bytes, passwd_len))
689 goto err;
690 }
691 if (!EVP_DigestUpdate(md2,
692 (n & 1) ? buf : (const unsigned char *)p_bytes,
693 (n & 1) ? buf_size : passwd_len))
694 goto err;
695 if (!EVP_DigestFinal_ex(md2, buf, NULL))
696 goto err;
697 }
698 EVP_MD_CTX_free(md2);
699 EVP_MD_CTX_free(md);
700 md2 = NULL;
701 md = NULL;
702 OPENSSL_free(p_bytes);
703 OPENSSL_free(s_bytes);
704 p_bytes = NULL;
705 s_bytes = NULL;
706
707 cp = out_buf + strlen(out_buf);
708 *cp++ = ascii_dollar[0];
709
710 # define b64_from_24bit(B2, B1, B0, N) \
711 do { \
712 unsigned int w = ((B2) << 16) | ((B1) << 8) | (B0); \
713 int i = (N); \
714 while (i-- > 0) { \
715 *cp++ = cov_2char[w & 0x3f]; \
716 w >>= 6; \
717 } \
718 } while (0)
719
720 switch (magic[0]) {
721 case '5':
722 b64_from_24bit (buf[0], buf[10], buf[20], 4);
723 b64_from_24bit (buf[21], buf[1], buf[11], 4);
724 b64_from_24bit (buf[12], buf[22], buf[2], 4);
725 b64_from_24bit (buf[3], buf[13], buf[23], 4);
726 b64_from_24bit (buf[24], buf[4], buf[14], 4);
727 b64_from_24bit (buf[15], buf[25], buf[5], 4);
728 b64_from_24bit (buf[6], buf[16], buf[26], 4);
729 b64_from_24bit (buf[27], buf[7], buf[17], 4);
730 b64_from_24bit (buf[18], buf[28], buf[8], 4);
731 b64_from_24bit (buf[9], buf[19], buf[29], 4);
732 b64_from_24bit (0, buf[31], buf[30], 3);
733 break;
734 case '6':
735 b64_from_24bit (buf[0], buf[21], buf[42], 4);
736 b64_from_24bit (buf[22], buf[43], buf[1], 4);
737 b64_from_24bit (buf[44], buf[2], buf[23], 4);
738 b64_from_24bit (buf[3], buf[24], buf[45], 4);
739 b64_from_24bit (buf[25], buf[46], buf[4], 4);
740 b64_from_24bit (buf[47], buf[5], buf[26], 4);
741 b64_from_24bit (buf[6], buf[27], buf[48], 4);
742 b64_from_24bit (buf[28], buf[49], buf[7], 4);
743 b64_from_24bit (buf[50], buf[8], buf[29], 4);
744 b64_from_24bit (buf[9], buf[30], buf[51], 4);
745 b64_from_24bit (buf[31], buf[52], buf[10], 4);
746 b64_from_24bit (buf[53], buf[11], buf[32], 4);
747 b64_from_24bit (buf[12], buf[33], buf[54], 4);
748 b64_from_24bit (buf[34], buf[55], buf[13], 4);
749 b64_from_24bit (buf[56], buf[14], buf[35], 4);
750 b64_from_24bit (buf[15], buf[36], buf[57], 4);
751 b64_from_24bit (buf[37], buf[58], buf[16], 4);
752 b64_from_24bit (buf[59], buf[17], buf[38], 4);
753 b64_from_24bit (buf[18], buf[39], buf[60], 4);
754 b64_from_24bit (buf[40], buf[61], buf[19], 4);
755 b64_from_24bit (buf[62], buf[20], buf[41], 4);
756 b64_from_24bit (0, 0, buf[63], 2);
757 break;
758 default:
759 goto err;
760 }
761 *cp = '\0';
762 #ifdef CHARSET_EBCDIC
763 ascii2ebcdic(out_buf, out_buf, strlen(out_buf));
764 #endif
765
766 return out_buf;
767
768 err:
769 EVP_MD_CTX_free(md2);
770 EVP_MD_CTX_free(md);
771 OPENSSL_free(p_bytes);
772 OPENSSL_free(s_bytes);
773 OPENSSL_free(ascii_passwd);
774 return NULL;
775 }
776
do_passwd(int passed_salt,char ** salt_p,char ** salt_malloc_p,char * passwd,BIO * out,int quiet,int table,int reverse,size_t pw_maxlen,passwd_modes mode)777 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
778 char *passwd, BIO *out, int quiet, int table,
779 int reverse, size_t pw_maxlen, passwd_modes mode)
780 {
781 char *hash = NULL;
782
783 assert(salt_p != NULL);
784 assert(salt_malloc_p != NULL);
785
786 /* first make sure we have a salt */
787 if (!passed_salt) {
788 size_t saltlen = 0;
789 size_t i;
790
791 if (mode == passwd_md5 || mode == passwd_apr1 || mode == passwd_aixmd5)
792 saltlen = 8;
793
794 if (mode == passwd_sha256 || mode == passwd_sha512)
795 saltlen = 16;
796
797 assert(saltlen != 0);
798
799 if (*salt_malloc_p == NULL)
800 *salt_p = *salt_malloc_p = app_malloc(saltlen + 1, "salt buffer");
801 if (RAND_bytes((unsigned char *)*salt_p, saltlen) <= 0)
802 goto end;
803
804 for (i = 0; i < saltlen; i++)
805 (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */
806 (*salt_p)[i] = 0;
807 # ifdef CHARSET_EBCDIC
808 /* The password encryption function will convert back to ASCII */
809 ascii2ebcdic(*salt_p, *salt_p, saltlen);
810 # endif
811 }
812
813 assert(*salt_p != NULL);
814
815 /* truncate password if necessary */
816 if ((strlen(passwd) > pw_maxlen)) {
817 if (!quiet)
818 /*
819 * XXX: really we should know how to print a size_t, not cast it
820 */
821 BIO_printf(bio_err,
822 "Warning: truncating password to %u characters\n",
823 (unsigned)pw_maxlen);
824 passwd[pw_maxlen] = 0;
825 }
826 assert(strlen(passwd) <= pw_maxlen);
827
828 /* now compute password hash */
829 if (mode == passwd_md5 || mode == passwd_apr1)
830 hash = md5crypt(passwd, (mode == passwd_md5 ? "1" : "apr1"), *salt_p);
831 if (mode == passwd_aixmd5)
832 hash = md5crypt(passwd, "", *salt_p);
833 if (mode == passwd_sha256 || mode == passwd_sha512)
834 hash = shacrypt(passwd, (mode == passwd_sha256 ? "5" : "6"), *salt_p);
835 assert(hash != NULL);
836
837 if (table && !reverse)
838 BIO_printf(out, "%s\t%s\n", passwd, hash);
839 else if (table && reverse)
840 BIO_printf(out, "%s\t%s\n", hash, passwd);
841 else
842 BIO_printf(out, "%s\n", hash);
843 return 1;
844
845 end:
846 return 0;
847 }
848
