2 * Copyright 2000-2017 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
60 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
61 char *passwd, BIO *out, int quiet, int table,
62 int reverse, size_t pw_maxlen, passwd_modes mode);
64 typedef enum OPTION_choice {
65 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
67 OPT_NOVERIFY, OPT_QUIET, OPT_TABLE, OPT_REVERSE, OPT_APR1,
68 OPT_1, OPT_5, OPT_6, OPT_CRYPT, OPT_AIXMD5, OPT_SALT, OPT_STDIN,
72 const OPTIONS passwd_options[] = {
73 {"help", OPT_HELP, '-', "Display this summary"},
74 {"in", OPT_IN, '<', "Read passwords from file"},
75 {"noverify", OPT_NOVERIFY, '-',
76 "Never verify when reading password from terminal"},
77 {"quiet", OPT_QUIET, '-', "No warnings"},
78 {"table", OPT_TABLE, '-', "Format output as table"},
79 {"reverse", OPT_REVERSE, '-', "Switch table columns"},
80 {"salt", OPT_SALT, 's', "Use provided salt"},
81 {"stdin", OPT_STDIN, '-', "Read passwords from stdin"},
83 {"6", OPT_6, '-', "SHA512-based password algorithm"},
84 {"5", OPT_5, '-', "SHA256-based password algorithm"},
86 # ifndef NO_MD5CRYPT_1
87 {"apr1", OPT_APR1, '-', "MD5-based password algorithm, Apache variant"},
88 {"1", OPT_1, '-', "MD5-based password algorithm"},
89 {"aixmd5", OPT_AIXMD5, '-', "AIX MD5-based password algorithm"},
91 # ifndef OPENSSL_NO_DES
92 {"crypt", OPT_CRYPT, '-', "Standard Unix password algorithm (default)"},
98 int passwd_main(int argc, char **argv)
101 char *infile = NULL, *salt = NULL, *passwd = NULL, **passwds = NULL;
102 char *salt_malloc = NULL, *passwd_malloc = NULL, *prog;
104 int in_stdin = 0, pw_source_defined = 0;
105 # ifndef OPENSSL_NO_UI_CONSOLE
108 int passed_salt = 0, quiet = 0, table = 0, reverse = 0;
110 passwd_modes mode = passwd_unset;
111 size_t passwd_malloc_size = 0;
112 size_t pw_maxlen = 256; /* arbitrary limit, should be enough for most
115 prog = opt_init(argc, argv, passwd_options);
116 while ((o = opt_next()) != OPT_EOF) {
121 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
124 opt_help(passwd_options);
128 if (pw_source_defined)
131 pw_source_defined = 1;
134 # ifndef OPENSSL_NO_UI_CONSOLE
148 if (mode != passwd_unset)
153 if (mode != passwd_unset)
155 mode = passwd_sha256;
158 if (mode != passwd_unset)
160 mode = passwd_sha512;
163 if (mode != passwd_unset)
168 if (mode != passwd_unset)
170 mode = passwd_aixmd5;
173 if (mode != passwd_unset)
182 if (pw_source_defined)
185 pw_source_defined = 1;
193 argc = opt_num_rest();
197 if (pw_source_defined)
199 pw_source_defined = 1;
203 if (mode == passwd_unset) {
208 # ifdef OPENSSL_NO_DES
209 if (mode == passwd_crypt)
212 # ifdef NO_MD5CRYPT_1
213 if (mode == passwd_md5 || mode == passwd_apr1 || mode == passwd_aixmd5)
217 if (mode == passwd_sha256 || mode == passwd_sha512)
221 if (infile != NULL && in_stdin) {
222 BIO_printf(bio_err, "%s: Can't combine -in and -stdin\n", prog);
226 if (infile != NULL || in_stdin) {
228 * If in_stdin is true, we know that infile is NULL, and that
229 * bio_open_default() will give us back an alias for stdin.
231 in = bio_open_default(infile, 'r', FORMAT_TEXT);
236 if (mode == passwd_crypt)
239 if (passwds == NULL) {
240 /* no passwords on the command line */
242 passwd_malloc_size = pw_maxlen + 2;
243 /* longer than necessary so that we can warn about truncation */
244 passwd = passwd_malloc =
245 app_malloc(passwd_malloc_size, "password buffer");
248 if ((in == NULL) && (passwds == NULL)) {
250 * we use the following method to make sure what
251 * in the 'else' section is always compiled, to
252 * avoid rot of not-frequently-used code.
255 # ifndef OPENSSL_NO_UI_CONSOLE
256 /* build a null-terminated list */
257 static char *passwds_static[2] = { NULL, NULL };
259 passwds = passwds_static;
261 if (EVP_read_pw_string
262 (passwd_malloc, passwd_malloc_size, "Password: ",
263 !(passed_salt || in_noverify)) != 0)
266 passwds[0] = passwd_malloc;
269 BIO_printf(bio_err, "password required\n");
275 assert(passwds != NULL);
276 assert(*passwds != NULL);
278 do { /* loop over list of passwords */
280 if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, bio_out,
281 quiet, table, reverse, pw_maxlen, mode))
283 } while (*passwds != NULL);
288 assert(passwd != NULL);
290 int r = BIO_gets(in, passwd, pw_maxlen + 1);
292 char *c = (strchr(passwd, '\n'));
294 *c = 0; /* truncate at newline */
296 /* ignore rest of line */
299 r = BIO_gets(in, trash, sizeof trash);
300 while ((r > 0) && (!strchr(trash, '\n')));
304 (passed_salt, &salt, &salt_malloc, passwd, bio_out, quiet,
305 table, reverse, pw_maxlen, mode))
314 ERR_print_errors(bio_err);
315 OPENSSL_free(salt_malloc);
316 OPENSSL_free(passwd_malloc);
321 # ifndef NO_MD5CRYPT_1
323 * MD5-based password algorithm (should probably be available as a library
324 * function; then the static buffer would not be acceptable). For magic
325 * string "1", this should be compatible to the MD5-based BSD password
326 * algorithm. For 'magic' string "apr1", this is compatible to the MD5-based
327 * Apache password algorithm. (Apparently, the Apache password algorithm is
328 * identical except that the 'magic' string was changed -- the laziest
329 * application of the NIH principle I've ever encountered.)
331 static char *md5crypt(const char *passwd, const char *magic, const char *salt)
333 /* "$apr1$..salt..$.......md5hash..........\0" */
334 static char out_buf[6 + 9 + 24 + 2];
335 unsigned char buf[MD5_DIGEST_LENGTH];
339 EVP_MD_CTX *md = NULL, *md2 = NULL;
340 size_t passwd_len, salt_len, magic_len;
342 passwd_len = strlen(passwd);
345 magic_len = strlen(magic);
351 if (magic_len > 4) /* assert it's "1" or "apr1" */
354 OPENSSL_strlcat(out_buf, magic, sizeof out_buf);
355 OPENSSL_strlcat(out_buf, "$", sizeof out_buf);
358 OPENSSL_strlcat(out_buf, salt, sizeof out_buf);
360 if (strlen(out_buf) > 6 + 8) /* assert "$apr1$..salt.." */
365 salt_out += 2 + magic_len;
366 salt_len = strlen(salt_out);
371 md = EVP_MD_CTX_new();
373 || !EVP_DigestInit_ex(md, EVP_md5(), NULL)
374 || !EVP_DigestUpdate(md, passwd, passwd_len))
378 if (!EVP_DigestUpdate(md, "$", 1)
379 || !EVP_DigestUpdate(md, magic, magic_len)
380 || !EVP_DigestUpdate(md, "$", 1))
383 if (!EVP_DigestUpdate(md, salt_out, salt_len))
386 md2 = EVP_MD_CTX_new();
388 || !EVP_DigestInit_ex(md2, EVP_md5(), NULL)
389 || !EVP_DigestUpdate(md2, passwd, passwd_len)
390 || !EVP_DigestUpdate(md2, salt_out, salt_len)
391 || !EVP_DigestUpdate(md2, passwd, passwd_len)
392 || !EVP_DigestFinal_ex(md2, buf, NULL))
395 for (i = passwd_len; i > sizeof buf; i -= sizeof buf) {
396 if (!EVP_DigestUpdate(md, buf, sizeof buf))
399 if (!EVP_DigestUpdate(md, buf, i))
404 if (!EVP_DigestUpdate(md, (n & 1) ? "\0" : passwd, 1))
408 if (!EVP_DigestFinal_ex(md, buf, NULL))
411 for (i = 0; i < 1000; i++) {
412 if (!EVP_DigestInit_ex(md2, EVP_md5(), NULL))
414 if (!EVP_DigestUpdate(md2,
415 (i & 1) ? (unsigned const char *)passwd : buf,
416 (i & 1) ? passwd_len : sizeof buf))
419 if (!EVP_DigestUpdate(md2, salt_out, salt_len))
423 if (!EVP_DigestUpdate(md2, passwd, passwd_len))
426 if (!EVP_DigestUpdate(md2,
427 (i & 1) ? buf : (unsigned const char *)passwd,
428 (i & 1) ? sizeof buf : passwd_len))
430 if (!EVP_DigestFinal_ex(md2, buf, NULL))
433 EVP_MD_CTX_free(md2);
439 /* transform buf into output string */
440 unsigned char buf_perm[sizeof buf];
444 /* silly output permutation */
445 for (dest = 0, source = 0; dest < 14;
446 dest++, source = (source + 6) % 17)
447 buf_perm[dest] = buf[source];
448 buf_perm[14] = buf[5];
449 buf_perm[15] = buf[11];
450 # ifndef PEDANTIC /* Unfortunately, this generates a "no
452 assert(16 == sizeof buf_perm);
455 output = salt_out + salt_len;
456 assert(output == out_buf + strlen(out_buf));
460 for (i = 0; i < 15; i += 3) {
461 *output++ = cov_2char[buf_perm[i + 2] & 0x3f];
462 *output++ = cov_2char[((buf_perm[i + 1] & 0xf) << 2) |
463 (buf_perm[i + 2] >> 6)];
464 *output++ = cov_2char[((buf_perm[i] & 3) << 4) |
465 (buf_perm[i + 1] >> 4)];
466 *output++ = cov_2char[buf_perm[i] >> 2];
469 *output++ = cov_2char[buf_perm[i] & 0x3f];
470 *output++ = cov_2char[buf_perm[i] >> 6];
472 assert(strlen(out_buf) < sizeof(out_buf));
478 EVP_MD_CTX_free(md2);
486 * SHA based password algorithm, describe by Ulrich Drepper here:
487 * https://www.akkadia.org/drepper/SHA-crypt.txt
488 * (note that it's in the public domain)
490 static char *shacrypt(const char *passwd, const char *magic, const char *salt)
492 /* Prefix for optional rounds specification. */
493 static const char rounds_prefix[] = "rounds=";
494 /* Maximum salt string length. */
495 # define SALT_LEN_MAX 16
496 /* Default number of rounds if not explicitly specified. */
497 # define ROUNDS_DEFAULT 5000
498 /* Minimum number of rounds. */
499 # define ROUNDS_MIN 1000
500 /* Maximum number of rounds. */
501 # define ROUNDS_MAX 999999999
503 /* "$6$rounds=<N>$......salt......$...shahash(up to 86 chars)...\0" */
504 static char out_buf[3 + 17 + 17 + 86 + 1];
505 unsigned char buf[SHA512_DIGEST_LENGTH];
506 unsigned char temp_buf[SHA512_DIGEST_LENGTH];
508 char salt_copy[17]; /* Max 16 chars plus '\0' */
510 EVP_MD_CTX *md = NULL, *md2 = NULL;
511 const EVP_MD *sha = NULL;
512 size_t passwd_len, salt_len, magic_len;
513 unsigned int rounds = 5000; /* Default */
514 char rounds_custom = 0;
515 char *p_bytes = NULL;
516 char *s_bytes = NULL;
519 passwd_len = strlen(passwd);
520 magic_len = strlen(magic);
522 /* assert it's "5" or "6" */
539 if (strncmp(salt, rounds_prefix, sizeof(rounds_prefix) - 1) == 0) {
540 const char *num = salt + sizeof(rounds_prefix) - 1;
542 unsigned long int srounds = strtoul (num, &endp, 10);
545 if (srounds > ROUNDS_MAX)
547 else if (srounds < ROUNDS_MIN)
550 rounds = (unsigned int)srounds;
557 /* The salt gets truncated to 16 chars */
558 OPENSSL_strlcpy(salt_copy, salt, sizeof salt_copy);
559 salt_len = strlen(salt_copy);
562 OPENSSL_strlcat(out_buf, "$", sizeof out_buf);
563 OPENSSL_strlcat(out_buf, magic, sizeof out_buf);
564 OPENSSL_strlcat(out_buf, "$", sizeof out_buf);
566 char tmp_buf[80]; /* "rounds=999999999" */
567 sprintf(tmp_buf, "rounds=%u", rounds);
568 OPENSSL_strlcat(out_buf, tmp_buf, sizeof out_buf);
569 OPENSSL_strlcat(out_buf, "$", sizeof out_buf);
571 OPENSSL_strlcat(out_buf, salt_copy, sizeof out_buf);
573 /* assert "$5$rounds=999999999$......salt......" */
574 if (strlen(out_buf) > 3 + 17 * rounds_custom + salt_len )
577 md = EVP_MD_CTX_new();
579 || !EVP_DigestInit_ex(md, sha, NULL)
580 || !EVP_DigestUpdate(md, passwd, passwd_len)
581 || !EVP_DigestUpdate(md, salt_copy, salt_len))
584 md2 = EVP_MD_CTX_new();
586 || !EVP_DigestInit_ex(md2, sha, NULL)
587 || !EVP_DigestUpdate(md2, passwd, passwd_len)
588 || !EVP_DigestUpdate(md2, salt_copy, salt_len)
589 || !EVP_DigestUpdate(md2, passwd, passwd_len)
590 || !EVP_DigestFinal_ex(md2, buf, NULL))
593 for (n = passwd_len; n > buf_size; n -= buf_size) {
594 if (!EVP_DigestUpdate(md, buf, buf_size))
597 if (!EVP_DigestUpdate(md, buf, n))
602 if (!EVP_DigestUpdate(md,
603 (n & 1) ? buf : (unsigned const char *)passwd,
604 (n & 1) ? buf_size : passwd_len))
608 if (!EVP_DigestFinal_ex(md, buf, NULL))
612 if (!EVP_DigestInit_ex(md2, sha, NULL))
615 for (n = passwd_len; n > 0; n--)
616 if (!EVP_DigestUpdate(md2, passwd, passwd_len))
619 if (!EVP_DigestFinal_ex(md2, temp_buf, NULL))
622 if ((p_bytes = OPENSSL_zalloc(passwd_len)) == NULL)
624 for (cp = p_bytes, n = passwd_len; n > buf_size; n -= buf_size, cp += buf_size)
625 memcpy(cp, temp_buf, buf_size);
626 memcpy(cp, temp_buf, n);
629 if (!EVP_DigestInit_ex(md2, sha, NULL))
632 for (n = 16 + buf[0]; n > 0; n--)
633 if (!EVP_DigestUpdate(md2, salt, salt_len))
636 if (!EVP_DigestFinal_ex(md2, temp_buf, NULL))
639 if ((s_bytes = OPENSSL_zalloc(salt_len)) == NULL)
641 for (cp = s_bytes, n = salt_len; n > buf_size; n -= buf_size, cp += buf_size)
642 memcpy(cp, temp_buf, buf_size);
643 memcpy(cp, temp_buf, n);
645 for (n = 0; n < rounds; n++) {
646 if (!EVP_DigestInit_ex(md2, sha, NULL))
648 if (!EVP_DigestUpdate(md2,
649 (n & 1) ? (unsigned const char *)p_bytes : buf,
650 (n & 1) ? passwd_len : buf_size))
653 if (!EVP_DigestUpdate(md2, s_bytes, salt_len))
657 if (!EVP_DigestUpdate(md2, p_bytes, passwd_len))
660 if (!EVP_DigestUpdate(md2,
661 (n & 1) ? buf : (unsigned const char *)p_bytes,
662 (n & 1) ? buf_size : passwd_len))
664 if (!EVP_DigestFinal_ex(md2, buf, NULL))
667 EVP_MD_CTX_free(md2);
671 OPENSSL_free(p_bytes);
672 OPENSSL_free(s_bytes);
676 cp = out_buf + strlen(out_buf);
679 # define b64_from_24bit(B2, B1, B0, N) \
681 unsigned int w = ((B2) << 16) | ((B1) << 8) | (B0); \
685 *cp++ = cov_2char[w & 0x3f]; \
692 b64_from_24bit (buf[0], buf[10], buf[20], 4);
693 b64_from_24bit (buf[21], buf[1], buf[11], 4);
694 b64_from_24bit (buf[12], buf[22], buf[2], 4);
695 b64_from_24bit (buf[3], buf[13], buf[23], 4);
696 b64_from_24bit (buf[24], buf[4], buf[14], 4);
697 b64_from_24bit (buf[15], buf[25], buf[5], 4);
698 b64_from_24bit (buf[6], buf[16], buf[26], 4);
699 b64_from_24bit (buf[27], buf[7], buf[17], 4);
700 b64_from_24bit (buf[18], buf[28], buf[8], 4);
701 b64_from_24bit (buf[9], buf[19], buf[29], 4);
702 b64_from_24bit (0, buf[31], buf[30], 3);
705 b64_from_24bit (buf[0], buf[21], buf[42], 4);
706 b64_from_24bit (buf[22], buf[43], buf[1], 4);
707 b64_from_24bit (buf[44], buf[2], buf[23], 4);
708 b64_from_24bit (buf[3], buf[24], buf[45], 4);
709 b64_from_24bit (buf[25], buf[46], buf[4], 4);
710 b64_from_24bit (buf[47], buf[5], buf[26], 4);
711 b64_from_24bit (buf[6], buf[27], buf[48], 4);
712 b64_from_24bit (buf[28], buf[49], buf[7], 4);
713 b64_from_24bit (buf[50], buf[8], buf[29], 4);
714 b64_from_24bit (buf[9], buf[30], buf[51], 4);
715 b64_from_24bit (buf[31], buf[52], buf[10], 4);
716 b64_from_24bit (buf[53], buf[11], buf[32], 4);
717 b64_from_24bit (buf[12], buf[33], buf[54], 4);
718 b64_from_24bit (buf[34], buf[55], buf[13], 4);
719 b64_from_24bit (buf[56], buf[14], buf[35], 4);
720 b64_from_24bit (buf[15], buf[36], buf[57], 4);
721 b64_from_24bit (buf[37], buf[58], buf[16], 4);
722 b64_from_24bit (buf[59], buf[17], buf[38], 4);
723 b64_from_24bit (buf[18], buf[39], buf[60], 4);
724 b64_from_24bit (buf[40], buf[61], buf[19], 4);
725 b64_from_24bit (buf[62], buf[20], buf[41], 4);
726 b64_from_24bit (0, 0, buf[63], 2);
736 EVP_MD_CTX_free(md2);
738 OPENSSL_free(p_bytes);
739 OPENSSL_free(s_bytes);
744 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
745 char *passwd, BIO *out, int quiet, int table,
746 int reverse, size_t pw_maxlen, passwd_modes mode)
750 assert(salt_p != NULL);
751 assert(salt_malloc_p != NULL);
753 /* first make sure we have a salt */
755 # ifndef OPENSSL_NO_DES
756 if (mode == passwd_crypt) {
757 if (*salt_malloc_p == NULL)
758 *salt_p = *salt_malloc_p = app_malloc(3, "salt buffer");
759 if (RAND_bytes((unsigned char *)*salt_p, 2) <= 0)
761 (*salt_p)[0] = cov_2char[(*salt_p)[0] & 0x3f]; /* 6 bits */
762 (*salt_p)[1] = cov_2char[(*salt_p)[1] & 0x3f]; /* 6 bits */
764 # ifdef CHARSET_EBCDIC
765 ascii2ebcdic(*salt_p, *salt_p, 2); /* des_crypt will convert back
769 # endif /* !OPENSSL_NO_DES */
771 # ifndef NO_MD5CRYPT_1
772 if (mode == passwd_md5 || mode == passwd_apr1 || mode == passwd_aixmd5) {
775 if (*salt_malloc_p == NULL)
776 *salt_p = *salt_malloc_p = app_malloc(9, "salt buffer");
777 if (RAND_bytes((unsigned char *)*salt_p, 8) <= 0)
780 for (i = 0; i < 8; i++)
781 (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */
784 # endif /* !NO_MD5CRYPT_1 */
787 if (mode == passwd_sha256 || mode == passwd_sha512) {
790 if (*salt_malloc_p == NULL)
791 *salt_p = *salt_malloc_p = app_malloc(17, "salt buffer");
792 if (RAND_bytes((unsigned char *)*salt_p, 16) <= 0)
795 for (i = 0; i < 16; i++)
796 (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */
799 # endif /* !NO_SHACRYPT */
802 assert(*salt_p != NULL);
804 /* truncate password if necessary */
805 if ((strlen(passwd) > pw_maxlen)) {
808 * XXX: really we should know how to print a size_t, not cast it
811 "Warning: truncating password to %u characters\n",
812 (unsigned)pw_maxlen);
813 passwd[pw_maxlen] = 0;
815 assert(strlen(passwd) <= pw_maxlen);
817 /* now compute password hash */
818 # ifndef OPENSSL_NO_DES
819 if (mode == passwd_crypt)
820 hash = DES_crypt(passwd, *salt_p);
822 # ifndef NO_MD5CRYPT_1
823 if (mode == passwd_md5 || mode == passwd_apr1)
824 hash = md5crypt(passwd, (mode == passwd_md5 ? "1" : "apr1"), *salt_p);
825 if (mode == passwd_aixmd5)
826 hash = md5crypt(passwd, "", *salt_p);
829 if (mode == passwd_sha256 || mode == passwd_sha512)
830 hash = shacrypt(passwd, (mode == passwd_sha256 ? "5" : "6"), *salt_p);
832 assert(hash != NULL);
834 if (table && !reverse)
835 BIO_printf(out, "%s\t%s\n", passwd, hash);
836 else if (table && reverse)
837 BIO_printf(out, "%s\t%s\n", hash, passwd);
839 BIO_printf(out, "%s\n", hash);
847 int passwd_main(int argc, char **argv)
849 BIO_printf(bio_err, "Program not available.\n");