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,
56 OPT_QUIET,
57 OPT_TABLE,
58 OPT_REVERSE,
59 OPT_APR1,
60 OPT_1,
61 OPT_5,
62 OPT_6,
63 OPT_AIXMD5,
64 OPT_SALT,
65 OPT_STDIN,
66 OPT_R_ENUM,
67 OPT_PROV_ENUM
68 } OPTION_CHOICE;
69
70 const OPTIONS passwd_options[] = {
71 { OPT_HELP_STR, 1, '-', "Usage: %s [options] [password]\n" },
72
73 OPT_SECTION("General"),
74 { "help", OPT_HELP, '-', "Display this summary" },
75
76 OPT_SECTION("Input"),
77 { "in", OPT_IN, '<', "Read passwords from file" },
78 { "noverify", OPT_NOVERIFY, '-',
79 "Never verify when reading password from terminal" },
80 { "stdin", OPT_STDIN, '-', "Read passwords from stdin" },
81
82 OPT_SECTION("Output"),
83 { "quiet", OPT_QUIET, '-', "No warnings" },
84 { "table", OPT_TABLE, '-', "Format output as table" },
85 { "reverse", OPT_REVERSE, '-', "Switch table columns" },
86
87 OPT_SECTION("Cryptographic"),
88 { "salt", OPT_SALT, 's', "Use provided salt" },
89 { "6", OPT_6, '-', "SHA512-based password algorithm" },
90 { "5", OPT_5, '-', "SHA256-based password algorithm" },
91 { "apr1", OPT_APR1, '-', "MD5-based password algorithm, Apache variant" },
92 { "1", OPT_1, '-', "MD5-based password algorithm" },
93 { "aixmd5", OPT_AIXMD5, '-', "AIX MD5-based password algorithm" },
94
95 OPT_R_OPTIONS,
96 OPT_PROV_OPTIONS,
97
98 OPT_PARAMETERS(),
99 { "password", 0, 0, "Password text to digest (optional)" },
100 { NULL }
101 };
102
passwd_main(int argc,char ** argv)103 int passwd_main(int argc, char **argv)
104 {
105 BIO *in = NULL;
106 char *infile = NULL, *salt = NULL, *passwd = NULL, **passwds = NULL;
107 char *salt_malloc = NULL, *passwd_malloc = NULL, *prog;
108 OPTION_CHOICE o;
109 int in_stdin = 0, pw_source_defined = 0;
110 #ifndef OPENSSL_NO_UI_CONSOLE
111 int in_noverify = 0;
112 #endif
113 int passed_salt = 0, quiet = 0, table = 0, reverse = 0;
114 int ret = 1;
115 passwd_modes mode = passwd_unset;
116 size_t passwd_malloc_size = 0;
117 size_t pw_maxlen = 256; /* arbitrary limit, should be enough for most
118 * passwords */
119
120 prog = opt_init(argc, argv, passwd_options);
121 while ((o = opt_next()) != OPT_EOF) {
122 switch (o) {
123 case OPT_EOF:
124 case OPT_ERR:
125 opthelp:
126 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
127 goto end;
128 case OPT_HELP:
129 opt_help(passwd_options);
130 ret = 0;
131 goto end;
132 case OPT_IN:
133 if (pw_source_defined)
134 goto opthelp;
135 infile = opt_arg();
136 pw_source_defined = 1;
137 break;
138 case OPT_NOVERIFY:
139 #ifndef OPENSSL_NO_UI_CONSOLE
140 in_noverify = 1;
141 #endif
142 break;
143 case OPT_QUIET:
144 quiet = 1;
145 break;
146 case OPT_TABLE:
147 table = 1;
148 break;
149 case OPT_REVERSE:
150 reverse = 1;
151 break;
152 case OPT_1:
153 if (mode != passwd_unset)
154 goto opthelp;
155 mode = passwd_md5;
156 break;
157 case OPT_5:
158 if (mode != passwd_unset)
159 goto opthelp;
160 mode = passwd_sha256;
161 break;
162 case OPT_6:
163 if (mode != passwd_unset)
164 goto opthelp;
165 mode = passwd_sha512;
166 break;
167 case OPT_APR1:
168 if (mode != passwd_unset)
169 goto opthelp;
170 mode = passwd_apr1;
171 break;
172 case OPT_AIXMD5:
173 if (mode != passwd_unset)
174 goto opthelp;
175 mode = passwd_aixmd5;
176 break;
177 case OPT_SALT:
178 passed_salt = 1;
179 salt = opt_arg();
180 break;
181 case OPT_STDIN:
182 if (pw_source_defined)
183 goto opthelp;
184 in_stdin = 1;
185 pw_source_defined = 1;
186 break;
187 case OPT_R_CASES:
188 if (!opt_rand(o))
189 goto end;
190 break;
191 case OPT_PROV_CASES:
192 if (!opt_provider(o))
193 goto end;
194 break;
195 }
196 }
197
198 /* All remaining arguments are the password text */
199 argc = opt_num_rest();
200 argv = opt_rest();
201 if (*argv != NULL) {
202 if (pw_source_defined)
203 goto opthelp;
204 pw_source_defined = 1;
205 passwds = argv;
206 }
207
208 if (!app_RAND_load())
209 goto end;
210
211 if (mode == passwd_unset) {
212 /* use default */
213 mode = passwd_md5;
214 }
215
216 if (infile != NULL && in_stdin) {
217 BIO_printf(bio_err, "%s: Can't combine -in and -stdin\n", prog);
218 goto end;
219 }
220
221 if (infile != NULL || in_stdin) {
222 /*
223 * If in_stdin is true, we know that infile is NULL, and that
224 * bio_open_default() will give us back an alias for stdin.
225 */
226 in = bio_open_default(infile, 'r', FORMAT_TEXT);
227 if (in == NULL)
228 goto end;
229 }
230
231 if (passwds == NULL) {
232 /* no passwords on the command line */
233
234 passwd_malloc_size = pw_maxlen + 2;
235 /* longer than necessary so that we can warn about truncation */
236 passwd = passwd_malloc = app_malloc(passwd_malloc_size, "password buffer");
237 }
238
239 if ((in == NULL) && (passwds == NULL)) {
240 /*
241 * we use the following method to make sure what
242 * in the 'else' section is always compiled, to
243 * avoid rot of not-frequently-used code.
244 */
245 if (1) {
246 #ifndef OPENSSL_NO_UI_CONSOLE
247 /* build a null-terminated list */
248 static char *passwds_static[2] = { NULL, NULL };
249
250 passwds = passwds_static;
251 if (in == NULL) {
252 if (EVP_read_pw_string(passwd_malloc, passwd_malloc_size, "Password: ",
253 !(passed_salt || in_noverify))
254 != 0)
255 goto end;
256 }
257 passwds[0] = passwd_malloc;
258 } else {
259 #endif
260 BIO_printf(bio_err, "password required\n");
261 goto end;
262 }
263 }
264
265 if (in == NULL) {
266 assert(passwds != NULL);
267 assert(*passwds != NULL);
268
269 do { /* loop over list of passwords */
270 passwd = *passwds++;
271 if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, bio_out,
272 quiet, table, reverse, pw_maxlen, mode))
273 goto end;
274 } while (*passwds != NULL);
275 } else {
276 /* in != NULL */
277 int done;
278
279 assert(passwd != NULL);
280 do {
281 int r = BIO_gets(in, passwd, pw_maxlen + 1);
282 if (r > 0) {
283 char *c = (strchr(passwd, '\n'));
284 if (c != NULL) {
285 *c = 0; /* truncate at newline */
286 } else {
287 /* ignore rest of line */
288 char trash[BUFSIZ];
289 do
290 r = BIO_gets(in, trash, sizeof(trash));
291 while ((r > 0) && (!strchr(trash, '\n')));
292 }
293
294 if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, bio_out, quiet,
295 table, reverse, pw_maxlen, mode))
296 goto end;
297 }
298 done = (r <= 0);
299 } while (!done);
300 }
301 ret = 0;
302
303 end:
304 #if 0
305 ERR_print_errors(bio_err);
306 #endif
307 OPENSSL_free(salt_malloc);
308 OPENSSL_free(passwd_malloc);
309 BIO_free(in);
310 return ret;
311 }
312
313 /*
314 * MD5-based password algorithm (should probably be available as a library
315 * function; then the static buffer would not be acceptable). For magic
316 * string "1", this should be compatible to the MD5-based BSD password
317 * algorithm. For 'magic' string "apr1", this is compatible to the MD5-based
318 * Apache password algorithm. (Apparently, the Apache password algorithm is
319 * identical except that the 'magic' string was changed -- the laziest
320 * application of the NIH principle I've ever encountered.)
321 */
md5crypt(const char * passwd,const char * magic,const char * salt)322 static char *md5crypt(const char *passwd, const char *magic, const char *salt)
323 {
324 /* "$apr1$..salt..$.......md5hash..........\0" */
325 static char out_buf[6 + 9 + 24 + 2];
326 unsigned char buf[MD5_DIGEST_LENGTH];
327 char ascii_magic[5]; /* "apr1" plus '\0' */
328 char ascii_salt[9]; /* Max 8 chars plus '\0' */
329 char *ascii_passwd = NULL;
330 char *salt_out;
331 int n;
332 unsigned int i;
333 EVP_MD_CTX *md = NULL, *md2 = NULL;
334 size_t passwd_len, salt_len, magic_len;
335
336 passwd_len = strlen(passwd);
337
338 out_buf[0] = 0;
339 magic_len = strlen(magic);
340 OPENSSL_strlcpy(ascii_magic, magic, sizeof(ascii_magic));
341 #ifdef CHARSET_EBCDIC
342 if ((magic[0] & 0x80) != 0) /* High bit is 1 in EBCDIC alnums */
343 ebcdic2ascii(ascii_magic, ascii_magic, magic_len);
344 #endif
345
346 /* The salt gets truncated to 8 chars */
347 OPENSSL_strlcpy(ascii_salt, salt, sizeof(ascii_salt));
348 salt_len = strlen(ascii_salt);
349 #ifdef CHARSET_EBCDIC
350 ebcdic2ascii(ascii_salt, ascii_salt, salt_len);
351 #endif
352
353 #ifdef CHARSET_EBCDIC
354 ascii_passwd = OPENSSL_strdup(passwd);
355 if (ascii_passwd == NULL)
356 return NULL;
357 ebcdic2ascii(ascii_passwd, ascii_passwd, passwd_len);
358 passwd = ascii_passwd;
359 #endif
360
361 if (magic_len > 0) {
362 OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf));
363
364 if (magic_len > 4) /* assert it's "1" or "apr1" */
365 goto err;
366
367 OPENSSL_strlcat(out_buf, ascii_magic, sizeof(out_buf));
368 OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf));
369 }
370
371 OPENSSL_strlcat(out_buf, ascii_salt, sizeof(out_buf));
372
373 if (strlen(out_buf) > 6 + 8) /* assert "$apr1$..salt.." */
374 goto err;
375
376 salt_out = out_buf;
377 if (magic_len > 0)
378 salt_out += 2 + magic_len;
379
380 assert(salt_len <= 8);
381
382 md = EVP_MD_CTX_new();
383 if (md == NULL
384 || !EVP_DigestInit_ex(md, EVP_md5(), NULL)
385 || !EVP_DigestUpdate(md, passwd, passwd_len))
386 goto err;
387
388 if (magic_len > 0)
389 if (!EVP_DigestUpdate(md, ascii_dollar, 1)
390 || !EVP_DigestUpdate(md, ascii_magic, magic_len)
391 || !EVP_DigestUpdate(md, ascii_dollar, 1))
392 goto err;
393
394 if (!EVP_DigestUpdate(md, ascii_salt, salt_len))
395 goto err;
396
397 md2 = EVP_MD_CTX_new();
398 if (md2 == NULL
399 || !EVP_DigestInit_ex(md2, EVP_md5(), NULL)
400 || !EVP_DigestUpdate(md2, passwd, passwd_len)
401 || !EVP_DigestUpdate(md2, ascii_salt, salt_len)
402 || !EVP_DigestUpdate(md2, passwd, passwd_len)
403 || !EVP_DigestFinal_ex(md2, buf, NULL))
404 goto err;
405
406 for (i = passwd_len; i > sizeof(buf); i -= sizeof(buf)) {
407 if (!EVP_DigestUpdate(md, buf, sizeof(buf)))
408 goto err;
409 }
410 if (!EVP_DigestUpdate(md, buf, i))
411 goto err;
412
413 n = passwd_len;
414 while (n) {
415 if (!EVP_DigestUpdate(md, (n & 1) ? "\0" : passwd, 1))
416 goto err;
417 n >>= 1;
418 }
419 if (!EVP_DigestFinal_ex(md, buf, NULL))
420 goto err;
421
422 for (i = 0; i < 1000; i++) {
423 if (!EVP_DigestInit_ex(md2, EVP_md5(), NULL))
424 goto err;
425 if (!EVP_DigestUpdate(md2,
426 (i & 1) ? (const unsigned char *)passwd : buf,
427 (i & 1) ? passwd_len : sizeof(buf)))
428 goto err;
429 if (i % 3) {
430 if (!EVP_DigestUpdate(md2, ascii_salt, salt_len))
431 goto err;
432 }
433 if (i % 7) {
434 if (!EVP_DigestUpdate(md2, passwd, passwd_len))
435 goto err;
436 }
437 if (!EVP_DigestUpdate(md2,
438 (i & 1) ? buf : (const unsigned char *)passwd,
439 (i & 1) ? sizeof(buf) : passwd_len))
440 goto err;
441 if (!EVP_DigestFinal_ex(md2, buf, NULL))
442 goto err;
443 }
444 EVP_MD_CTX_free(md2);
445 EVP_MD_CTX_free(md);
446 md2 = NULL;
447 md = NULL;
448
449 {
450 /* transform buf into output string */
451 unsigned char buf_perm[sizeof(buf)];
452 int dest, source;
453 char *output;
454
455 /* silly output permutation */
456 for (dest = 0, source = 0; dest < 14;
457 dest++, source = (source + 6) % 17)
458 buf_perm[dest] = buf[source];
459 buf_perm[14] = buf[5];
460 buf_perm[15] = buf[11];
461 #ifndef PEDANTIC /* Unfortunately, this generates a "no \
462 * effect" warning */
463 assert(16 == sizeof(buf_perm));
464 #endif
465
466 output = salt_out + salt_len;
467 assert(output == out_buf + strlen(out_buf));
468
469 *output++ = ascii_dollar[0];
470
471 for (i = 0; i < 15; i += 3) {
472 *output++ = cov_2char[buf_perm[i + 2] & 0x3f];
473 *output++ = cov_2char[((buf_perm[i + 1] & 0xf) << 2) | (buf_perm[i + 2] >> 6)];
474 *output++ = cov_2char[((buf_perm[i] & 3) << 4) | (buf_perm[i + 1] >> 4)];
475 *output++ = cov_2char[buf_perm[i] >> 2];
476 }
477 assert(i == 15);
478 *output++ = cov_2char[buf_perm[i] & 0x3f];
479 *output++ = cov_2char[buf_perm[i] >> 6];
480 *output = 0;
481 assert(strlen(out_buf) < sizeof(out_buf));
482 #ifdef CHARSET_EBCDIC
483 ascii2ebcdic(out_buf, out_buf, strlen(out_buf));
484 #endif
485 }
486
487 return out_buf;
488
489 err:
490 OPENSSL_free(ascii_passwd);
491 EVP_MD_CTX_free(md2);
492 EVP_MD_CTX_free(md);
493 return NULL;
494 }
495
496 /*
497 * SHA based password algorithm, describe by Ulrich Drepper here:
498 * https://www.akkadia.org/drepper/SHA-crypt.txt
499 * (note that it's in the public domain)
500 */
shacrypt(const char * passwd,const char * magic,const char * salt)501 static char *shacrypt(const char *passwd, const char *magic, const char *salt)
502 {
503 /* Prefix for optional rounds specification. */
504 static const char rounds_prefix[] = "rounds=";
505 /* Maximum salt string length. */
506 #define SALT_LEN_MAX 16
507 /* Default number of rounds if not explicitly specified. */
508 #define ROUNDS_DEFAULT 5000
509 /* Minimum number of rounds. */
510 #define ROUNDS_MIN 1000
511 /* Maximum number of rounds. */
512 #define ROUNDS_MAX 999999999
513
514 /* "$6$rounds=<N>$......salt......$...shahash(up to 86 chars)...\0" */
515 static char out_buf[3 + 17 + 17 + 86 + 1];
516 unsigned char buf[SHA512_DIGEST_LENGTH];
517 unsigned char temp_buf[SHA512_DIGEST_LENGTH];
518 size_t buf_size = 0;
519 char ascii_magic[2];
520 char ascii_salt[17]; /* Max 16 chars plus '\0' */
521 char *ascii_passwd = NULL;
522 size_t n;
523 EVP_MD_CTX *md = NULL, *md2 = NULL;
524 const EVP_MD *sha = NULL;
525 size_t passwd_len, salt_len, magic_len;
526 unsigned int rounds = ROUNDS_DEFAULT; /* Default */
527 char rounds_custom = 0;
528 char *p_bytes = NULL;
529 char *s_bytes = NULL;
530 char *cp = NULL;
531
532 passwd_len = strlen(passwd);
533 magic_len = strlen(magic);
534
535 /* assert it's "5" or "6" */
536 if (magic_len != 1)
537 return NULL;
538
539 switch (magic[0]) {
540 case '5':
541 sha = EVP_sha256();
542 buf_size = 32;
543 break;
544 case '6':
545 sha = EVP_sha512();
546 buf_size = 64;
547 break;
548 default:
549 return NULL;
550 }
551
552 if (strncmp(salt, rounds_prefix, sizeof(rounds_prefix) - 1) == 0) {
553 const char *num = salt + sizeof(rounds_prefix) - 1;
554 char *endp;
555 unsigned long int srounds = strtoul(num, &endp, 10);
556 if (*endp == '$') {
557 salt = endp + 1;
558 if (srounds > ROUNDS_MAX)
559 rounds = ROUNDS_MAX;
560 else if (srounds < ROUNDS_MIN)
561 rounds = ROUNDS_MIN;
562 else
563 rounds = (unsigned int)srounds;
564 rounds_custom = 1;
565 } else {
566 return NULL;
567 }
568 }
569
570 OPENSSL_strlcpy(ascii_magic, magic, sizeof(ascii_magic));
571 #ifdef CHARSET_EBCDIC
572 if ((magic[0] & 0x80) != 0) /* High bit is 1 in EBCDIC alnums */
573 ebcdic2ascii(ascii_magic, ascii_magic, magic_len);
574 #endif
575
576 /* The salt gets truncated to 16 chars */
577 OPENSSL_strlcpy(ascii_salt, salt, sizeof(ascii_salt));
578 salt_len = strlen(ascii_salt);
579 #ifdef CHARSET_EBCDIC
580 ebcdic2ascii(ascii_salt, ascii_salt, salt_len);
581 #endif
582
583 #ifdef CHARSET_EBCDIC
584 ascii_passwd = OPENSSL_strdup(passwd);
585 if (ascii_passwd == NULL)
586 return NULL;
587 ebcdic2ascii(ascii_passwd, ascii_passwd, passwd_len);
588 passwd = ascii_passwd;
589 #endif
590
591 out_buf[0] = 0;
592 OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf));
593 OPENSSL_strlcat(out_buf, ascii_magic, sizeof(out_buf));
594 OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf));
595 if (rounds_custom) {
596 char tmp_buf[80]; /* "rounds=999999999" */
597
598 BIO_snprintf(tmp_buf, sizeof(tmp_buf), "rounds=%u", rounds);
599 #ifdef CHARSET_EBCDIC
600 /* In case we're really on a ASCII based platform and just pretend */
601 if (tmp_buf[0] != 0x72) /* ASCII 'r' */
602 ebcdic2ascii(tmp_buf, tmp_buf, strlen(tmp_buf));
603 #endif
604 OPENSSL_strlcat(out_buf, tmp_buf, sizeof(out_buf));
605 OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf));
606 }
607 OPENSSL_strlcat(out_buf, ascii_salt, sizeof(out_buf));
608
609 /* assert "$5$rounds=999999999$......salt......" */
610 if (strlen(out_buf) > 3 + 17 * rounds_custom + salt_len)
611 goto err;
612
613 md = EVP_MD_CTX_new();
614 if (md == NULL
615 || !EVP_DigestInit_ex(md, sha, NULL)
616 || !EVP_DigestUpdate(md, passwd, passwd_len)
617 || !EVP_DigestUpdate(md, ascii_salt, salt_len))
618 goto err;
619
620 md2 = EVP_MD_CTX_new();
621 if (md2 == NULL
622 || !EVP_DigestInit_ex(md2, sha, NULL)
623 || !EVP_DigestUpdate(md2, passwd, passwd_len)
624 || !EVP_DigestUpdate(md2, ascii_salt, salt_len)
625 || !EVP_DigestUpdate(md2, passwd, passwd_len)
626 || !EVP_DigestFinal_ex(md2, buf, NULL))
627 goto err;
628
629 for (n = passwd_len; n > buf_size; n -= buf_size) {
630 if (!EVP_DigestUpdate(md, buf, buf_size))
631 goto err;
632 }
633 if (!EVP_DigestUpdate(md, buf, n))
634 goto err;
635
636 n = passwd_len;
637 while (n) {
638 if (!EVP_DigestUpdate(md,
639 (n & 1) ? buf : (const unsigned char *)passwd,
640 (n & 1) ? buf_size : passwd_len))
641 goto err;
642 n >>= 1;
643 }
644 if (!EVP_DigestFinal_ex(md, buf, NULL))
645 goto err;
646
647 /* P sequence */
648 if (!EVP_DigestInit_ex(md2, sha, NULL))
649 goto err;
650
651 for (n = passwd_len; n > 0; n--)
652 if (!EVP_DigestUpdate(md2, passwd, passwd_len))
653 goto err;
654
655 if (!EVP_DigestFinal_ex(md2, temp_buf, NULL))
656 goto err;
657
658 if ((p_bytes = OPENSSL_zalloc(passwd_len)) == NULL)
659 goto err;
660 for (cp = p_bytes, n = passwd_len; n > buf_size; n -= buf_size, cp += buf_size)
661 memcpy(cp, temp_buf, buf_size);
662 memcpy(cp, temp_buf, n);
663
664 /* S sequence */
665 if (!EVP_DigestInit_ex(md2, sha, NULL))
666 goto err;
667
668 for (n = 16 + buf[0]; n > 0; n--)
669 if (!EVP_DigestUpdate(md2, ascii_salt, salt_len))
670 goto err;
671
672 if (!EVP_DigestFinal_ex(md2, temp_buf, NULL))
673 goto err;
674
675 if ((s_bytes = OPENSSL_zalloc(salt_len)) == NULL)
676 goto err;
677 for (cp = s_bytes, n = salt_len; n > buf_size; n -= buf_size, cp += buf_size)
678 memcpy(cp, temp_buf, buf_size);
679 memcpy(cp, temp_buf, n);
680
681 for (n = 0; n < rounds; n++) {
682 if (!EVP_DigestInit_ex(md2, sha, NULL))
683 goto err;
684 if (!EVP_DigestUpdate(md2,
685 (n & 1) ? (const unsigned char *)p_bytes : buf,
686 (n & 1) ? passwd_len : buf_size))
687 goto err;
688 if (n % 3) {
689 if (!EVP_DigestUpdate(md2, s_bytes, salt_len))
690 goto err;
691 }
692 if (n % 7) {
693 if (!EVP_DigestUpdate(md2, p_bytes, passwd_len))
694 goto err;
695 }
696 if (!EVP_DigestUpdate(md2,
697 (n & 1) ? buf : (const unsigned char *)p_bytes,
698 (n & 1) ? buf_size : passwd_len))
699 goto err;
700 if (!EVP_DigestFinal_ex(md2, buf, NULL))
701 goto err;
702 }
703 EVP_MD_CTX_free(md2);
704 EVP_MD_CTX_free(md);
705 md2 = NULL;
706 md = NULL;
707 OPENSSL_free(p_bytes);
708 OPENSSL_free(s_bytes);
709 p_bytes = NULL;
710 s_bytes = NULL;
711
712 cp = out_buf + strlen(out_buf);
713 *cp++ = ascii_dollar[0];
714
715 #define b64_from_24bit(B2, B1, B0, N) \
716 do { \
717 unsigned int w = ((B2) << 16) | ((B1) << 8) | (B0); \
718 int i = (N); \
719 while (i-- > 0) { \
720 *cp++ = cov_2char[w & 0x3f]; \
721 w >>= 6; \
722 } \
723 } while (0)
724
725 switch (magic[0]) {
726 case '5':
727 b64_from_24bit(buf[0], buf[10], buf[20], 4);
728 b64_from_24bit(buf[21], buf[1], buf[11], 4);
729 b64_from_24bit(buf[12], buf[22], buf[2], 4);
730 b64_from_24bit(buf[3], buf[13], buf[23], 4);
731 b64_from_24bit(buf[24], buf[4], buf[14], 4);
732 b64_from_24bit(buf[15], buf[25], buf[5], 4);
733 b64_from_24bit(buf[6], buf[16], buf[26], 4);
734 b64_from_24bit(buf[27], buf[7], buf[17], 4);
735 b64_from_24bit(buf[18], buf[28], buf[8], 4);
736 b64_from_24bit(buf[9], buf[19], buf[29], 4);
737 b64_from_24bit(0, buf[31], buf[30], 3);
738 break;
739 case '6':
740 b64_from_24bit(buf[0], buf[21], buf[42], 4);
741 b64_from_24bit(buf[22], buf[43], buf[1], 4);
742 b64_from_24bit(buf[44], buf[2], buf[23], 4);
743 b64_from_24bit(buf[3], buf[24], buf[45], 4);
744 b64_from_24bit(buf[25], buf[46], buf[4], 4);
745 b64_from_24bit(buf[47], buf[5], buf[26], 4);
746 b64_from_24bit(buf[6], buf[27], buf[48], 4);
747 b64_from_24bit(buf[28], buf[49], buf[7], 4);
748 b64_from_24bit(buf[50], buf[8], buf[29], 4);
749 b64_from_24bit(buf[9], buf[30], buf[51], 4);
750 b64_from_24bit(buf[31], buf[52], buf[10], 4);
751 b64_from_24bit(buf[53], buf[11], buf[32], 4);
752 b64_from_24bit(buf[12], buf[33], buf[54], 4);
753 b64_from_24bit(buf[34], buf[55], buf[13], 4);
754 b64_from_24bit(buf[56], buf[14], buf[35], 4);
755 b64_from_24bit(buf[15], buf[36], buf[57], 4);
756 b64_from_24bit(buf[37], buf[58], buf[16], 4);
757 b64_from_24bit(buf[59], buf[17], buf[38], 4);
758 b64_from_24bit(buf[18], buf[39], buf[60], 4);
759 b64_from_24bit(buf[40], buf[61], buf[19], 4);
760 b64_from_24bit(buf[62], buf[20], buf[41], 4);
761 b64_from_24bit(0, 0, buf[63], 2);
762 break;
763 default:
764 goto err;
765 }
766 *cp = '\0';
767 #ifdef CHARSET_EBCDIC
768 ascii2ebcdic(out_buf, out_buf, strlen(out_buf));
769 #endif
770
771 return out_buf;
772
773 err:
774 EVP_MD_CTX_free(md2);
775 EVP_MD_CTX_free(md);
776 OPENSSL_free(p_bytes);
777 OPENSSL_free(s_bytes);
778 OPENSSL_free(ascii_passwd);
779 return NULL;
780 }
781
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)782 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
783 char *passwd, BIO *out, int quiet, int table,
784 int reverse, size_t pw_maxlen, passwd_modes mode)
785 {
786 char *hash = NULL;
787
788 assert(salt_p != NULL);
789 assert(salt_malloc_p != NULL);
790
791 /* first make sure we have a salt */
792 if (!passed_salt) {
793 size_t saltlen = 0;
794 size_t i;
795
796 if (mode == passwd_md5 || mode == passwd_apr1 || mode == passwd_aixmd5)
797 saltlen = 8;
798
799 if (mode == passwd_sha256 || mode == passwd_sha512)
800 saltlen = 16;
801
802 assert(saltlen != 0);
803
804 if (*salt_malloc_p == NULL)
805 *salt_p = *salt_malloc_p = app_malloc(saltlen + 1, "salt buffer");
806 if (RAND_bytes((unsigned char *)*salt_p, saltlen) <= 0)
807 goto end;
808
809 for (i = 0; i < saltlen; i++)
810 (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */
811 (*salt_p)[i] = 0;
812 #ifdef CHARSET_EBCDIC
813 /* The password encryption function will convert back to ASCII */
814 ascii2ebcdic(*salt_p, *salt_p, saltlen);
815 #endif
816 }
817
818 assert(*salt_p != NULL);
819
820 /* truncate password if necessary */
821 if ((strlen(passwd) > pw_maxlen)) {
822 if (!quiet)
823 /*
824 * XXX: really we should know how to print a size_t, not cast it
825 */
826 BIO_printf(bio_err,
827 "Warning: truncating password to %u characters\n",
828 (unsigned)pw_maxlen);
829 passwd[pw_maxlen] = 0;
830 }
831 assert(strlen(passwd) <= pw_maxlen);
832
833 /* now compute password hash */
834 if (mode == passwd_md5 || mode == passwd_apr1)
835 hash = md5crypt(passwd, (mode == passwd_md5 ? "1" : "apr1"), *salt_p);
836 if (mode == passwd_aixmd5)
837 hash = md5crypt(passwd, "", *salt_p);
838 if (mode == passwd_sha256 || mode == passwd_sha512)
839 hash = shacrypt(passwd, (mode == passwd_sha256 ? "5" : "6"), *salt_p);
840 assert(hash != NULL);
841
842 if (table && !reverse)
843 BIO_printf(out, "%s\t%s\n", passwd, hash);
844 else if (table && reverse)
845 BIO_printf(out, "%s\t%s\n", hash, passwd);
846 else
847 BIO_printf(out, "%s\n", hash);
848 return 1;
849
850 end:
851 return 0;
852 }
853