2 * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (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
10 #if defined OPENSSL_NO_MD5 || defined CHARSET_EBCDIC
11 # define NO_MD5CRYPT_1
14 #if defined OPENSSL_NO_SHA || defined CHARSET_EBCDIC
18 #if !defined(OPENSSL_NO_DES) || !defined(NO_MD5CRYPT_1) || !defined(NO_SHACRYPT)
24 # include <openssl/bio.h>
25 # include <openssl/err.h>
26 # include <openssl/evp.h>
27 # include <openssl/rand.h>
28 # ifndef OPENSSL_NO_DES
29 # include <openssl/des.h>
31 # ifndef NO_MD5CRYPT_1
32 # include <openssl/md5.h>
35 # include <openssl/sha.h>
38 static unsigned const char cov_2char[64] = {
39 /* from crypto/des/fcrypt.c */
40 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35,
41 0x36, 0x37, 0x38, 0x39, 0x41, 0x42, 0x43, 0x44,
42 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C,
43 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54,
44 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x61, 0x62,
45 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
46 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72,
47 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A
59 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
60 char *passwd, BIO *out, int quiet, int table,
61 int reverse, size_t pw_maxlen, passwd_modes mode);
63 typedef enum OPTION_choice {
64 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
66 OPT_NOVERIFY, OPT_QUIET, OPT_TABLE, OPT_REVERSE, OPT_APR1,
67 OPT_1, OPT_5, OPT_6, OPT_CRYPT, OPT_SALT, OPT_STDIN
70 const OPTIONS passwd_options[] = {
71 {"help", OPT_HELP, '-', "Display this summary"},
72 {"in", OPT_IN, '<', "Pead passwords from file"},
73 {"noverify", OPT_NOVERIFY, '-',
74 "Never verify when reading password from terminal"},
75 {"quiet", OPT_QUIET, '-', "No warnings"},
76 {"table", OPT_TABLE, '-', "Format output as table"},
77 {"reverse", OPT_REVERSE, '-', "Switch table columns"},
78 {"salt", OPT_SALT, 's', "Use provided salt"},
79 {"stdin", OPT_STDIN, '-', "Read passwords from stdin"},
81 {"6", OPT_6, '-', "SHA512-based password algorithm"},
82 {"5", OPT_5, '-', "SHA256-based password algorithm"},
84 # ifndef NO_MD5CRYPT_1
85 {"apr1", OPT_APR1, '-', "MD5-based password algorithm, Apache variant"},
86 {"1", OPT_1, '-', "MD5-based password algorithm"},
88 # ifndef OPENSSL_NO_DES
89 {"crypt", OPT_CRYPT, '-', "Standard Unix password algorithm (default)"},
94 int passwd_main(int argc, char **argv)
97 char *infile = NULL, *salt = NULL, *passwd = NULL, **passwds = NULL;
98 char *salt_malloc = NULL, *passwd_malloc = NULL, *prog;
100 int in_stdin = 0, pw_source_defined = 0;
101 #ifndef OPENSSL_NO_UI
104 int passed_salt = 0, quiet = 0, table = 0, reverse = 0;
106 passwd_modes mode = passwd_unset;
107 size_t passwd_malloc_size = 0;
108 size_t pw_maxlen = 256; /* arbitrary limit, should be enough for most
111 prog = opt_init(argc, argv, passwd_options);
112 while ((o = opt_next()) != OPT_EOF) {
117 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
120 opt_help(passwd_options);
124 if (pw_source_defined)
127 pw_source_defined = 1;
130 #ifndef OPENSSL_NO_UI
144 if (mode != passwd_unset)
149 if (mode != passwd_unset)
151 mode = passwd_sha256;
154 if (mode != passwd_unset)
156 mode = passwd_sha512;
159 if (mode != passwd_unset)
164 if (mode != passwd_unset)
173 if (pw_source_defined)
176 pw_source_defined = 1;
180 argc = opt_num_rest();
184 if (pw_source_defined)
186 pw_source_defined = 1;
190 if (mode == passwd_unset) {
195 # ifdef OPENSSL_NO_DES
196 if (mode == passwd_crypt)
199 # ifdef NO_MD5CRYPT_1
200 if (mode == passwd_md5 || mode == passwd_apr1)
204 if (mode == passwd_sha256 || mode == passwd_sha512)
208 if (infile != NULL && in_stdin) {
209 BIO_printf(bio_err, "%s: Can't combine -in and -stdin\n", prog);
213 if (infile != NULL || in_stdin) {
215 * If in_stdin is true, we know that infile is NULL, and that
216 * bio_open_default() will give us back an alias for stdin.
218 in = bio_open_default(infile, 'r', FORMAT_TEXT);
223 if (mode == passwd_crypt)
226 if (passwds == NULL) {
227 /* no passwords on the command line */
229 passwd_malloc_size = pw_maxlen + 2;
230 /* longer than necessary so that we can warn about truncation */
231 passwd = passwd_malloc =
232 app_malloc(passwd_malloc_size, "password buffer");
235 if ((in == NULL) && (passwds == NULL)) {
237 #ifndef OPENSSL_NO_UI
238 /* build a null-terminated list */
239 static char *passwds_static[2] = { NULL, NULL };
241 passwds = passwds_static;
243 if (EVP_read_pw_string
244 (passwd_malloc, passwd_malloc_size, "Password: ",
245 !(passed_salt || in_noverify)) != 0)
247 passwds[0] = passwd_malloc;
250 BIO_printf(bio_err, "password required\n");
257 assert(passwds != NULL);
258 assert(*passwds != NULL);
260 do { /* loop over list of passwords */
262 if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, bio_out,
263 quiet, table, reverse, pw_maxlen, mode))
266 while (*passwds != NULL);
272 assert(passwd != NULL);
274 int r = BIO_gets(in, passwd, pw_maxlen + 1);
276 char *c = (strchr(passwd, '\n'));
278 *c = 0; /* truncate at newline */
280 /* ignore rest of line */
283 r = BIO_gets(in, trash, sizeof trash);
284 while ((r > 0) && (!strchr(trash, '\n')));
288 (passed_salt, &salt, &salt_malloc, passwd, bio_out, quiet,
289 table, reverse, pw_maxlen, mode))
299 ERR_print_errors(bio_err);
300 OPENSSL_free(salt_malloc);
301 OPENSSL_free(passwd_malloc);
306 # ifndef NO_MD5CRYPT_1
308 * MD5-based password algorithm (should probably be available as a library
309 * function; then the static buffer would not be acceptable). For magic
310 * string "1", this should be compatible to the MD5-based BSD password
311 * algorithm. For 'magic' string "apr1", this is compatible to the MD5-based
312 * Apache password algorithm. (Apparently, the Apache password algorithm is
313 * identical except that the 'magic' string was changed -- the laziest
314 * application of the NIH principle I've ever encountered.)
316 static char *md5crypt(const char *passwd, const char *magic, const char *salt)
318 /* "$apr1$..salt..$.......md5hash..........\0" */
319 static char out_buf[6 + 9 + 24 + 2];
320 unsigned char buf[MD5_DIGEST_LENGTH];
324 EVP_MD_CTX *md = NULL, *md2 = NULL;
325 size_t passwd_len, salt_len, magic_len;
327 passwd_len = strlen(passwd);
330 magic_len = strlen(magic);
332 if (magic_len > 4) /* assert it's "1" or "apr1" */
335 OPENSSL_strlcat(out_buf, magic, sizeof out_buf);
336 OPENSSL_strlcat(out_buf, "$", sizeof out_buf);
337 OPENSSL_strlcat(out_buf, salt, sizeof out_buf);
339 if (strlen(out_buf) > 6 + 8) /* assert "$apr1$..salt.." */
342 salt_out = out_buf + 2 + magic_len;
343 salt_len = strlen(salt_out);
348 md = EVP_MD_CTX_new();
350 || !EVP_DigestInit_ex(md, EVP_md5(), NULL)
351 || !EVP_DigestUpdate(md, passwd, passwd_len)
352 || !EVP_DigestUpdate(md, "$", 1)
353 || !EVP_DigestUpdate(md, magic, magic_len)
354 || !EVP_DigestUpdate(md, "$", 1)
355 || !EVP_DigestUpdate(md, salt_out, salt_len))
358 md2 = EVP_MD_CTX_new();
360 || !EVP_DigestInit_ex(md2, EVP_md5(), NULL)
361 || !EVP_DigestUpdate(md2, passwd, passwd_len)
362 || !EVP_DigestUpdate(md2, salt_out, salt_len)
363 || !EVP_DigestUpdate(md2, passwd, passwd_len)
364 || !EVP_DigestFinal_ex(md2, buf, NULL))
367 for (i = passwd_len; i > sizeof buf; i -= sizeof buf) {
368 if (!EVP_DigestUpdate(md, buf, sizeof buf))
371 if (!EVP_DigestUpdate(md, buf, i))
376 if (!EVP_DigestUpdate(md, (n & 1) ? "\0" : passwd, 1))
380 if (!EVP_DigestFinal_ex(md, buf, NULL))
383 for (i = 0; i < 1000; i++) {
384 if (!EVP_DigestInit_ex(md2, EVP_md5(), NULL))
386 if (!EVP_DigestUpdate(md2,
387 (i & 1) ? (unsigned const char *)passwd : buf,
388 (i & 1) ? passwd_len : sizeof buf))
391 if (!EVP_DigestUpdate(md2, salt_out, salt_len))
395 if (!EVP_DigestUpdate(md2, passwd, passwd_len))
398 if (!EVP_DigestUpdate(md2,
399 (i & 1) ? buf : (unsigned const char *)passwd,
400 (i & 1) ? sizeof buf : passwd_len))
402 if (!EVP_DigestFinal_ex(md2, buf, NULL))
405 EVP_MD_CTX_free(md2);
411 /* transform buf into output string */
412 unsigned char buf_perm[sizeof buf];
416 /* silly output permutation */
417 for (dest = 0, source = 0; dest < 14;
418 dest++, source = (source + 6) % 17)
419 buf_perm[dest] = buf[source];
420 buf_perm[14] = buf[5];
421 buf_perm[15] = buf[11];
422 # ifndef PEDANTIC /* Unfortunately, this generates a "no
424 assert(16 == sizeof buf_perm);
427 output = salt_out + salt_len;
428 assert(output == out_buf + strlen(out_buf));
432 for (i = 0; i < 15; i += 3) {
433 *output++ = cov_2char[buf_perm[i + 2] & 0x3f];
434 *output++ = cov_2char[((buf_perm[i + 1] & 0xf) << 2) |
435 (buf_perm[i + 2] >> 6)];
436 *output++ = cov_2char[((buf_perm[i] & 3) << 4) |
437 (buf_perm[i + 1] >> 4)];
438 *output++ = cov_2char[buf_perm[i] >> 2];
441 *output++ = cov_2char[buf_perm[i] & 0x3f];
442 *output++ = cov_2char[buf_perm[i] >> 6];
444 assert(strlen(out_buf) < sizeof(out_buf));
450 EVP_MD_CTX_free(md2);
458 * SHA based password algorithm, describe by Ulrich Drepper here:
459 * https://www.akkadia.org/drepper/SHA-crypt.txt
460 * (note that it's in the public domain)
462 static char *shacrypt(const char *passwd, const char *magic, const char *salt)
464 /* Prefix for optional rounds specification. */
465 static const char rounds_prefix[] = "rounds=";
466 /* Maximum salt string length. */
467 #define SALT_LEN_MAX 16
468 /* Default number of rounds if not explicitly specified. */
469 #define ROUNDS_DEFAULT 5000
470 /* Minimum number of rounds. */
471 #define ROUNDS_MIN 1000
472 /* Maximum number of rounds. */
473 #define ROUNDS_MAX 999999999
475 /* "$6$rounds=<N>$......salt......$...shahash(up to 86 chars)...\0" */
476 static char out_buf[3 + 17 + 17 + 86 + 1];
477 unsigned char buf[SHA512_DIGEST_LENGTH];
478 unsigned char temp_buf[SHA512_DIGEST_LENGTH];
480 char salt_copy[17]; /* Max 16 chars plus '\0' */
482 EVP_MD_CTX *md = NULL, *md2 = NULL;
483 const EVP_MD *sha = NULL;
484 size_t passwd_len, salt_len, magic_len;
485 size_t rounds = 5000; /* Default */
486 char rounds_custom = 0;
487 char *p_bytes = NULL;
488 char *s_bytes = NULL;
491 passwd_len = strlen(passwd);
492 magic_len = strlen(magic);
494 /* assert it's "5" or "6" */
511 if (strncmp(salt, rounds_prefix, sizeof(rounds_prefix) - 1) == 0) {
512 const char *num = salt + sizeof(rounds_prefix) - 1;
514 unsigned long int srounds = strtoul (num, &endp, 10);
517 if (srounds > ROUNDS_MAX)
519 else if (srounds < ROUNDS_MIN)
529 /* The salt gets truncated to 16 chars */
530 OPENSSL_strlcpy(salt_copy, salt, sizeof salt_copy);
531 salt_len = strlen(salt_copy);
534 OPENSSL_strlcat(out_buf, "$", sizeof out_buf);
535 OPENSSL_strlcat(out_buf, magic, sizeof out_buf);
536 OPENSSL_strlcat(out_buf, "$", sizeof out_buf);
538 char tmp_buf[7 + 9 + 1]; /* "rounds=999999999" */
539 sprintf(tmp_buf, "rounds=%lu", rounds);
540 OPENSSL_strlcat(out_buf, tmp_buf, sizeof out_buf);
541 OPENSSL_strlcat(out_buf, "$", sizeof out_buf);
543 OPENSSL_strlcat(out_buf, salt_copy, sizeof out_buf);
545 /* assert "$5$rounds=999999999$......salt......" */
546 if (strlen(out_buf) > 3 + 17 * rounds_custom + salt_len )
549 md = EVP_MD_CTX_new();
551 || !EVP_DigestInit_ex(md, sha, NULL)
552 || !EVP_DigestUpdate(md, passwd, passwd_len)
553 || !EVP_DigestUpdate(md, salt_copy, salt_len))
556 md2 = EVP_MD_CTX_new();
558 || !EVP_DigestInit_ex(md2, sha, NULL)
559 || !EVP_DigestUpdate(md2, passwd, passwd_len)
560 || !EVP_DigestUpdate(md2, salt_copy, salt_len)
561 || !EVP_DigestUpdate(md2, passwd, passwd_len)
562 || !EVP_DigestFinal_ex(md2, buf, NULL))
565 for (n = passwd_len; n > buf_size; n -= buf_size) {
566 if (!EVP_DigestUpdate(md, buf, buf_size))
569 if (!EVP_DigestUpdate(md, buf, n))
574 if (!EVP_DigestUpdate(md,
575 (n & 1) ? buf : (unsigned const char *)passwd,
576 (n & 1) ? buf_size : passwd_len))
580 if (!EVP_DigestFinal_ex(md, buf, NULL))
584 if (!EVP_DigestInit_ex(md2, sha, NULL))
587 for (n = passwd_len; n > 0; n--)
588 if (!EVP_DigestUpdate(md2, passwd, passwd_len))
591 if (!EVP_DigestFinal_ex(md2, temp_buf, NULL))
594 if ((p_bytes = OPENSSL_zalloc(passwd_len)) == NULL)
596 for (cp = p_bytes, n = passwd_len; n > buf_size; n -= buf_size, cp += buf_size)
597 memcpy(cp, temp_buf, buf_size);
598 memcpy(cp, temp_buf, n);
601 if (!EVP_DigestInit_ex(md2, sha, NULL))
604 for (n = 16 + buf[0]; n > 0; n--)
605 if (!EVP_DigestUpdate(md2, salt, salt_len))
608 if (!EVP_DigestFinal_ex(md2, temp_buf, NULL))
611 if ((s_bytes = OPENSSL_zalloc(salt_len)) == NULL)
613 for (cp = s_bytes, n = salt_len; n > buf_size; n -= buf_size, cp += buf_size)
614 memcpy(cp, temp_buf, buf_size);
615 memcpy(cp, temp_buf, n);
617 for (n = 0; n < rounds; n++) {
618 if (!EVP_DigestInit_ex(md2, sha, NULL))
620 if (!EVP_DigestUpdate(md2,
621 (n & 1) ? (unsigned const char *)p_bytes : buf,
622 (n & 1) ? passwd_len : buf_size))
625 if (!EVP_DigestUpdate(md2, s_bytes, salt_len))
629 if (!EVP_DigestUpdate(md2, p_bytes, passwd_len))
632 if (!EVP_DigestUpdate(md2,
633 (n & 1) ? buf : (unsigned const char *)p_bytes,
634 (n & 1) ? buf_size : passwd_len))
636 if (!EVP_DigestFinal_ex(md2, buf, NULL))
639 EVP_MD_CTX_free(md2);
643 OPENSSL_free(p_bytes);
644 OPENSSL_free(s_bytes);
648 cp = out_buf + strlen(out_buf);
651 #define b64_from_24bit(B2, B1, B0, N) \
653 unsigned int w = ((B2) << 16) | ((B1) << 8) | (B0); \
657 *cp++ = cov_2char[w & 0x3f]; \
664 b64_from_24bit (buf[0], buf[10], buf[20], 4);
665 b64_from_24bit (buf[21], buf[1], buf[11], 4);
666 b64_from_24bit (buf[12], buf[22], buf[2], 4);
667 b64_from_24bit (buf[3], buf[13], buf[23], 4);
668 b64_from_24bit (buf[24], buf[4], buf[14], 4);
669 b64_from_24bit (buf[15], buf[25], buf[5], 4);
670 b64_from_24bit (buf[6], buf[16], buf[26], 4);
671 b64_from_24bit (buf[27], buf[7], buf[17], 4);
672 b64_from_24bit (buf[18], buf[28], buf[8], 4);
673 b64_from_24bit (buf[9], buf[19], buf[29], 4);
674 b64_from_24bit (0, buf[31], buf[30], 3);
677 b64_from_24bit (buf[0], buf[21], buf[42], 4);
678 b64_from_24bit (buf[22], buf[43], buf[1], 4);
679 b64_from_24bit (buf[44], buf[2], buf[23], 4);
680 b64_from_24bit (buf[3], buf[24], buf[45], 4);
681 b64_from_24bit (buf[25], buf[46], buf[4], 4);
682 b64_from_24bit (buf[47], buf[5], buf[26], 4);
683 b64_from_24bit (buf[6], buf[27], buf[48], 4);
684 b64_from_24bit (buf[28], buf[49], buf[7], 4);
685 b64_from_24bit (buf[50], buf[8], buf[29], 4);
686 b64_from_24bit (buf[9], buf[30], buf[51], 4);
687 b64_from_24bit (buf[31], buf[52], buf[10], 4);
688 b64_from_24bit (buf[53], buf[11], buf[32], 4);
689 b64_from_24bit (buf[12], buf[33], buf[54], 4);
690 b64_from_24bit (buf[34], buf[55], buf[13], 4);
691 b64_from_24bit (buf[56], buf[14], buf[35], 4);
692 b64_from_24bit (buf[15], buf[36], buf[57], 4);
693 b64_from_24bit (buf[37], buf[58], buf[16], 4);
694 b64_from_24bit (buf[59], buf[17], buf[38], 4);
695 b64_from_24bit (buf[18], buf[39], buf[60], 4);
696 b64_from_24bit (buf[40], buf[61], buf[19], 4);
697 b64_from_24bit (buf[62], buf[20], buf[41], 4);
698 b64_from_24bit (0, 0, buf[63], 2);
708 EVP_MD_CTX_free(md2);
710 OPENSSL_free(p_bytes);
711 OPENSSL_free(s_bytes);
716 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
717 char *passwd, BIO *out, int quiet, int table,
718 int reverse, size_t pw_maxlen, passwd_modes mode)
722 assert(salt_p != NULL);
723 assert(salt_malloc_p != NULL);
725 /* first make sure we have a salt */
727 # ifndef OPENSSL_NO_DES
728 if (mode == passwd_crypt) {
729 if (*salt_malloc_p == NULL) {
730 *salt_p = *salt_malloc_p = app_malloc(3, "salt buffer");
732 if (RAND_bytes((unsigned char *)*salt_p, 2) <= 0)
734 (*salt_p)[0] = cov_2char[(*salt_p)[0] & 0x3f]; /* 6 bits */
735 (*salt_p)[1] = cov_2char[(*salt_p)[1] & 0x3f]; /* 6 bits */
737 # ifdef CHARSET_EBCDIC
738 ascii2ebcdic(*salt_p, *salt_p, 2); /* des_crypt will convert back
742 # endif /* !OPENSSL_NO_DES */
744 # ifndef NO_MD5CRYPT_1
745 if (mode == passwd_md5 || mode == passwd_apr1) {
748 if (*salt_malloc_p == NULL) {
749 *salt_p = *salt_malloc_p = app_malloc(9, "salt buffer");
751 if (RAND_bytes((unsigned char *)*salt_p, 8) <= 0)
754 for (i = 0; i < 8; i++)
755 (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */
758 # endif /* !NO_MD5CRYPT_1 */
761 if (mode == passwd_sha256 || mode == passwd_sha512) {
764 if (*salt_malloc_p == NULL) {
765 *salt_p = *salt_malloc_p = app_malloc(17, "salt buffer");
767 if (RAND_bytes((unsigned char *)*salt_p, 16) <= 0)
770 for (i = 0; i < 16; i++)
771 (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */
774 # endif /* !NO_SHACRYPT */
777 assert(*salt_p != NULL);
779 /* truncate password if necessary */
780 if ((strlen(passwd) > pw_maxlen)) {
783 * XXX: really we should know how to print a size_t, not cast it
786 "Warning: truncating password to %u characters\n",
787 (unsigned)pw_maxlen);
788 passwd[pw_maxlen] = 0;
790 assert(strlen(passwd) <= pw_maxlen);
792 /* now compute password hash */
793 # ifndef OPENSSL_NO_DES
794 if (mode == passwd_crypt)
795 hash = DES_crypt(passwd, *salt_p);
797 # ifndef NO_MD5CRYPT_1
798 if (mode == passwd_md5 || mode == passwd_apr1)
799 hash = md5crypt(passwd, (mode == passwd_md5 ? "1" : "apr1"), *salt_p);
802 if (mode == passwd_sha256 || mode == passwd_sha512)
803 hash = shacrypt(passwd, (mode == passwd_sha256 ? "5" : "6"), *salt_p);
805 assert(hash != NULL);
807 if (table && !reverse)
808 BIO_printf(out, "%s\t%s\n", passwd, hash);
809 else if (table && reverse)
810 BIO_printf(out, "%s\t%s\n", hash, passwd);
812 BIO_printf(out, "%s\n", hash);
820 int passwd_main(int argc, char **argv)
822 BIO_printf(bio_err, "Program not available.\n");