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
14 #include <openssl/bio.h>
15 #include <openssl/err.h>
16 #include <openssl/evp.h>
17 #include <openssl/rand.h>
18 #ifndef OPENSSL_NO_DES
19 # include <openssl/des.h>
21 #include <openssl/md5.h>
22 #include <openssl/sha.h>
24 static unsigned const char cov_2char[64] = {
25 /* from crypto/des/fcrypt.c */
26 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35,
27 0x36, 0x37, 0x38, 0x39, 0x41, 0x42, 0x43, 0x44,
28 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C,
29 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54,
30 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x61, 0x62,
31 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
32 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72,
33 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A
46 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
47 char *passwd, BIO *out, int quiet, int table,
48 int reverse, size_t pw_maxlen, passwd_modes mode);
50 typedef enum OPTION_choice {
51 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
53 OPT_NOVERIFY, OPT_QUIET, OPT_TABLE, OPT_REVERSE, OPT_APR1,
54 OPT_1, OPT_5, OPT_6, OPT_CRYPT, OPT_AIXMD5, OPT_SALT, OPT_STDIN,
58 const OPTIONS passwd_options[] = {
59 {"help", OPT_HELP, '-', "Display this summary"},
60 {"in", OPT_IN, '<', "Read passwords from file"},
61 {"noverify", OPT_NOVERIFY, '-',
62 "Never verify when reading password from terminal"},
63 {"quiet", OPT_QUIET, '-', "No warnings"},
64 {"table", OPT_TABLE, '-', "Format output as table"},
65 {"reverse", OPT_REVERSE, '-', "Switch table columns"},
66 {"salt", OPT_SALT, 's', "Use provided salt"},
67 {"stdin", OPT_STDIN, '-', "Read passwords from stdin"},
68 {"6", OPT_6, '-', "SHA512-based password algorithm"},
69 {"5", OPT_5, '-', "SHA256-based password algorithm"},
70 {"apr1", OPT_APR1, '-', "MD5-based password algorithm, Apache variant"},
71 {"1", OPT_1, '-', "MD5-based password algorithm"},
72 {"aixmd5", OPT_AIXMD5, '-', "AIX MD5-based password algorithm"},
73 #ifndef OPENSSL_NO_DES
74 {"crypt", OPT_CRYPT, '-', "Standard Unix password algorithm (default)"},
80 int passwd_main(int argc, char **argv)
83 char *infile = NULL, *salt = NULL, *passwd = NULL, **passwds = NULL;
84 char *salt_malloc = NULL, *passwd_malloc = NULL, *prog;
86 int in_stdin = 0, pw_source_defined = 0;
87 #ifndef OPENSSL_NO_UI_CONSOLE
90 int passed_salt = 0, quiet = 0, table = 0, reverse = 0;
92 passwd_modes mode = passwd_unset;
93 size_t passwd_malloc_size = 0;
94 size_t pw_maxlen = 256; /* arbitrary limit, should be enough for most
97 prog = opt_init(argc, argv, passwd_options);
98 while ((o = opt_next()) != OPT_EOF) {
103 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
106 opt_help(passwd_options);
110 if (pw_source_defined)
113 pw_source_defined = 1;
116 #ifndef OPENSSL_NO_UI_CONSOLE
130 if (mode != passwd_unset)
135 if (mode != passwd_unset)
137 mode = passwd_sha256;
140 if (mode != passwd_unset)
142 mode = passwd_sha512;
145 if (mode != passwd_unset)
150 if (mode != passwd_unset)
152 mode = passwd_aixmd5;
155 #ifndef OPENSSL_NO_DES
156 if (mode != passwd_unset)
166 if (pw_source_defined)
169 pw_source_defined = 1;
177 argc = opt_num_rest();
181 if (pw_source_defined)
183 pw_source_defined = 1;
187 if (mode == passwd_unset) {
192 #ifdef OPENSSL_NO_DES
193 if (mode == passwd_crypt)
197 if (infile != NULL && in_stdin) {
198 BIO_printf(bio_err, "%s: Can't combine -in and -stdin\n", prog);
202 if (infile != NULL || in_stdin) {
204 * If in_stdin is true, we know that infile is NULL, and that
205 * bio_open_default() will give us back an alias for stdin.
207 in = bio_open_default(infile, 'r', FORMAT_TEXT);
212 if (mode == passwd_crypt)
215 if (passwds == NULL) {
216 /* no passwords on the command line */
218 passwd_malloc_size = pw_maxlen + 2;
219 /* longer than necessary so that we can warn about truncation */
220 passwd = passwd_malloc =
221 app_malloc(passwd_malloc_size, "password buffer");
224 if ((in == NULL) && (passwds == NULL)) {
226 * we use the following method to make sure what
227 * in the 'else' section is always compiled, to
228 * avoid rot of not-frequently-used code.
231 #ifndef OPENSSL_NO_UI_CONSOLE
232 /* build a null-terminated list */
233 static char *passwds_static[2] = { NULL, NULL };
235 passwds = passwds_static;
237 if (EVP_read_pw_string
238 (passwd_malloc, passwd_malloc_size, "Password: ",
239 !(passed_salt || in_noverify)) != 0)
242 passwds[0] = passwd_malloc;
245 BIO_printf(bio_err, "password required\n");
251 assert(passwds != NULL);
252 assert(*passwds != NULL);
254 do { /* loop over list of passwords */
256 if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, bio_out,
257 quiet, table, reverse, pw_maxlen, mode))
259 } while (*passwds != NULL);
264 assert(passwd != NULL);
266 int r = BIO_gets(in, passwd, pw_maxlen + 1);
268 char *c = (strchr(passwd, '\n'));
270 *c = 0; /* truncate at newline */
272 /* ignore rest of line */
275 r = BIO_gets(in, trash, sizeof trash);
276 while ((r > 0) && (!strchr(trash, '\n')));
280 (passed_salt, &salt, &salt_malloc, passwd, bio_out, quiet,
281 table, reverse, pw_maxlen, mode))
290 ERR_print_errors(bio_err);
291 OPENSSL_free(salt_malloc);
292 OPENSSL_free(passwd_malloc);
298 * MD5-based password algorithm (should probably be available as a library
299 * function; then the static buffer would not be acceptable). For magic
300 * string "1", this should be compatible to the MD5-based BSD password
301 * algorithm. For 'magic' string "apr1", this is compatible to the MD5-based
302 * Apache password algorithm. (Apparently, the Apache password algorithm is
303 * identical except that the 'magic' string was changed -- the laziest
304 * application of the NIH principle I've ever encountered.)
306 static char *md5crypt(const char *passwd, const char *magic, const char *salt)
308 /* "$apr1$..salt..$.......md5hash..........\0" */
309 static char out_buf[6 + 9 + 24 + 2];
310 unsigned char buf[MD5_DIGEST_LENGTH];
314 EVP_MD_CTX *md = NULL, *md2 = NULL;
315 size_t passwd_len, salt_len, magic_len;
317 passwd_len = strlen(passwd);
320 magic_len = strlen(magic);
326 if (magic_len > 4) /* assert it's "1" or "apr1" */
329 OPENSSL_strlcat(out_buf, magic, sizeof out_buf);
330 OPENSSL_strlcat(out_buf, "$", sizeof out_buf);
333 OPENSSL_strlcat(out_buf, salt, sizeof out_buf);
335 if (strlen(out_buf) > 6 + 8) /* assert "$apr1$..salt.." */
340 salt_out += 2 + magic_len;
341 salt_len = strlen(salt_out);
346 md = EVP_MD_CTX_new();
348 || !EVP_DigestInit_ex(md, EVP_md5(), NULL)
349 || !EVP_DigestUpdate(md, passwd, passwd_len))
353 if (!EVP_DigestUpdate(md, "$", 1)
354 || !EVP_DigestUpdate(md, magic, magic_len)
355 || !EVP_DigestUpdate(md, "$", 1))
358 if (!EVP_DigestUpdate(md, salt_out, salt_len))
361 md2 = EVP_MD_CTX_new();
363 || !EVP_DigestInit_ex(md2, EVP_md5(), NULL)
364 || !EVP_DigestUpdate(md2, passwd, passwd_len)
365 || !EVP_DigestUpdate(md2, salt_out, salt_len)
366 || !EVP_DigestUpdate(md2, passwd, passwd_len)
367 || !EVP_DigestFinal_ex(md2, buf, NULL))
370 for (i = passwd_len; i > sizeof buf; i -= sizeof buf) {
371 if (!EVP_DigestUpdate(md, buf, sizeof buf))
374 if (!EVP_DigestUpdate(md, buf, i))
379 if (!EVP_DigestUpdate(md, (n & 1) ? "\0" : passwd, 1))
383 if (!EVP_DigestFinal_ex(md, buf, NULL))
386 for (i = 0; i < 1000; i++) {
387 if (!EVP_DigestInit_ex(md2, EVP_md5(), NULL))
389 if (!EVP_DigestUpdate(md2,
390 (i & 1) ? (unsigned const char *)passwd : buf,
391 (i & 1) ? passwd_len : sizeof buf))
394 if (!EVP_DigestUpdate(md2, salt_out, salt_len))
398 if (!EVP_DigestUpdate(md2, passwd, passwd_len))
401 if (!EVP_DigestUpdate(md2,
402 (i & 1) ? buf : (unsigned const char *)passwd,
403 (i & 1) ? sizeof buf : passwd_len))
405 if (!EVP_DigestFinal_ex(md2, buf, NULL))
408 EVP_MD_CTX_free(md2);
414 /* transform buf into output string */
415 unsigned char buf_perm[sizeof buf];
419 /* silly output permutation */
420 for (dest = 0, source = 0; dest < 14;
421 dest++, source = (source + 6) % 17)
422 buf_perm[dest] = buf[source];
423 buf_perm[14] = buf[5];
424 buf_perm[15] = buf[11];
425 # ifndef PEDANTIC /* Unfortunately, this generates a "no
427 assert(16 == sizeof buf_perm);
430 output = salt_out + salt_len;
431 assert(output == out_buf + strlen(out_buf));
435 for (i = 0; i < 15; i += 3) {
436 *output++ = cov_2char[buf_perm[i + 2] & 0x3f];
437 *output++ = cov_2char[((buf_perm[i + 1] & 0xf) << 2) |
438 (buf_perm[i + 2] >> 6)];
439 *output++ = cov_2char[((buf_perm[i] & 3) << 4) |
440 (buf_perm[i + 1] >> 4)];
441 *output++ = cov_2char[buf_perm[i] >> 2];
444 *output++ = cov_2char[buf_perm[i] & 0x3f];
445 *output++ = cov_2char[buf_perm[i] >> 6];
447 assert(strlen(out_buf) < sizeof(out_buf));
453 EVP_MD_CTX_free(md2);
459 * SHA based password algorithm, describe by Ulrich Drepper here:
460 * https://www.akkadia.org/drepper/SHA-crypt.txt
461 * (note that it's in the public domain)
463 static char *shacrypt(const char *passwd, const char *magic, const char *salt)
465 /* Prefix for optional rounds specification. */
466 static const char rounds_prefix[] = "rounds=";
467 /* Maximum salt string length. */
468 # define SALT_LEN_MAX 16
469 /* Default number of rounds if not explicitly specified. */
470 # define ROUNDS_DEFAULT 5000
471 /* Minimum number of rounds. */
472 # define ROUNDS_MIN 1000
473 /* Maximum number of rounds. */
474 # define ROUNDS_MAX 999999999
476 /* "$6$rounds=<N>$......salt......$...shahash(up to 86 chars)...\0" */
477 static char out_buf[3 + 17 + 17 + 86 + 1];
478 unsigned char buf[SHA512_DIGEST_LENGTH];
479 unsigned char temp_buf[SHA512_DIGEST_LENGTH];
481 char salt_copy[17]; /* Max 16 chars plus '\0' */
483 EVP_MD_CTX *md = NULL, *md2 = NULL;
484 const EVP_MD *sha = NULL;
485 size_t passwd_len, salt_len, magic_len;
486 unsigned int rounds = 5000; /* Default */
487 char rounds_custom = 0;
488 char *p_bytes = NULL;
489 char *s_bytes = NULL;
492 passwd_len = strlen(passwd);
493 magic_len = strlen(magic);
495 /* assert it's "5" or "6" */
512 if (strncmp(salt, rounds_prefix, sizeof(rounds_prefix) - 1) == 0) {
513 const char *num = salt + sizeof(rounds_prefix) - 1;
515 unsigned long int srounds = strtoul (num, &endp, 10);
518 if (srounds > ROUNDS_MAX)
520 else if (srounds < ROUNDS_MIN)
523 rounds = (unsigned int)srounds;
530 /* The salt gets truncated to 16 chars */
531 OPENSSL_strlcpy(salt_copy, salt, sizeof salt_copy);
532 salt_len = strlen(salt_copy);
535 OPENSSL_strlcat(out_buf, "$", sizeof out_buf);
536 OPENSSL_strlcat(out_buf, magic, sizeof out_buf);
537 OPENSSL_strlcat(out_buf, "$", sizeof out_buf);
539 char tmp_buf[80]; /* "rounds=999999999" */
540 sprintf(tmp_buf, "rounds=%u", rounds);
541 OPENSSL_strlcat(out_buf, tmp_buf, sizeof out_buf);
542 OPENSSL_strlcat(out_buf, "$", sizeof out_buf);
544 OPENSSL_strlcat(out_buf, salt_copy, sizeof out_buf);
546 /* assert "$5$rounds=999999999$......salt......" */
547 if (strlen(out_buf) > 3 + 17 * rounds_custom + salt_len )
550 md = EVP_MD_CTX_new();
552 || !EVP_DigestInit_ex(md, sha, NULL)
553 || !EVP_DigestUpdate(md, passwd, passwd_len)
554 || !EVP_DigestUpdate(md, salt_copy, salt_len))
557 md2 = EVP_MD_CTX_new();
559 || !EVP_DigestInit_ex(md2, sha, NULL)
560 || !EVP_DigestUpdate(md2, passwd, passwd_len)
561 || !EVP_DigestUpdate(md2, salt_copy, salt_len)
562 || !EVP_DigestUpdate(md2, passwd, passwd_len)
563 || !EVP_DigestFinal_ex(md2, buf, NULL))
566 for (n = passwd_len; n > buf_size; n -= buf_size) {
567 if (!EVP_DigestUpdate(md, buf, buf_size))
570 if (!EVP_DigestUpdate(md, buf, n))
575 if (!EVP_DigestUpdate(md,
576 (n & 1) ? buf : (unsigned const char *)passwd,
577 (n & 1) ? buf_size : passwd_len))
581 if (!EVP_DigestFinal_ex(md, buf, NULL))
585 if (!EVP_DigestInit_ex(md2, sha, NULL))
588 for (n = passwd_len; n > 0; n--)
589 if (!EVP_DigestUpdate(md2, passwd, passwd_len))
592 if (!EVP_DigestFinal_ex(md2, temp_buf, NULL))
595 if ((p_bytes = OPENSSL_zalloc(passwd_len)) == NULL)
597 for (cp = p_bytes, n = passwd_len; n > buf_size; n -= buf_size, cp += buf_size)
598 memcpy(cp, temp_buf, buf_size);
599 memcpy(cp, temp_buf, n);
602 if (!EVP_DigestInit_ex(md2, sha, NULL))
605 for (n = 16 + buf[0]; n > 0; n--)
606 if (!EVP_DigestUpdate(md2, salt, salt_len))
609 if (!EVP_DigestFinal_ex(md2, temp_buf, NULL))
612 if ((s_bytes = OPENSSL_zalloc(salt_len)) == NULL)
614 for (cp = s_bytes, n = salt_len; n > buf_size; n -= buf_size, cp += buf_size)
615 memcpy(cp, temp_buf, buf_size);
616 memcpy(cp, temp_buf, n);
618 for (n = 0; n < rounds; n++) {
619 if (!EVP_DigestInit_ex(md2, sha, NULL))
621 if (!EVP_DigestUpdate(md2,
622 (n & 1) ? (unsigned const char *)p_bytes : buf,
623 (n & 1) ? passwd_len : buf_size))
626 if (!EVP_DigestUpdate(md2, s_bytes, salt_len))
630 if (!EVP_DigestUpdate(md2, p_bytes, passwd_len))
633 if (!EVP_DigestUpdate(md2,
634 (n & 1) ? buf : (unsigned const char *)p_bytes,
635 (n & 1) ? buf_size : passwd_len))
637 if (!EVP_DigestFinal_ex(md2, buf, NULL))
640 EVP_MD_CTX_free(md2);
644 OPENSSL_free(p_bytes);
645 OPENSSL_free(s_bytes);
649 cp = out_buf + strlen(out_buf);
652 # define b64_from_24bit(B2, B1, B0, N) \
654 unsigned int w = ((B2) << 16) | ((B1) << 8) | (B0); \
658 *cp++ = cov_2char[w & 0x3f]; \
665 b64_from_24bit (buf[0], buf[10], buf[20], 4);
666 b64_from_24bit (buf[21], buf[1], buf[11], 4);
667 b64_from_24bit (buf[12], buf[22], buf[2], 4);
668 b64_from_24bit (buf[3], buf[13], buf[23], 4);
669 b64_from_24bit (buf[24], buf[4], buf[14], 4);
670 b64_from_24bit (buf[15], buf[25], buf[5], 4);
671 b64_from_24bit (buf[6], buf[16], buf[26], 4);
672 b64_from_24bit (buf[27], buf[7], buf[17], 4);
673 b64_from_24bit (buf[18], buf[28], buf[8], 4);
674 b64_from_24bit (buf[9], buf[19], buf[29], 4);
675 b64_from_24bit (0, buf[31], buf[30], 3);
678 b64_from_24bit (buf[0], buf[21], buf[42], 4);
679 b64_from_24bit (buf[22], buf[43], buf[1], 4);
680 b64_from_24bit (buf[44], buf[2], buf[23], 4);
681 b64_from_24bit (buf[3], buf[24], buf[45], 4);
682 b64_from_24bit (buf[25], buf[46], buf[4], 4);
683 b64_from_24bit (buf[47], buf[5], buf[26], 4);
684 b64_from_24bit (buf[6], buf[27], buf[48], 4);
685 b64_from_24bit (buf[28], buf[49], buf[7], 4);
686 b64_from_24bit (buf[50], buf[8], buf[29], 4);
687 b64_from_24bit (buf[9], buf[30], buf[51], 4);
688 b64_from_24bit (buf[31], buf[52], buf[10], 4);
689 b64_from_24bit (buf[53], buf[11], buf[32], 4);
690 b64_from_24bit (buf[12], buf[33], buf[54], 4);
691 b64_from_24bit (buf[34], buf[55], buf[13], 4);
692 b64_from_24bit (buf[56], buf[14], buf[35], 4);
693 b64_from_24bit (buf[15], buf[36], buf[57], 4);
694 b64_from_24bit (buf[37], buf[58], buf[16], 4);
695 b64_from_24bit (buf[59], buf[17], buf[38], 4);
696 b64_from_24bit (buf[18], buf[39], buf[60], 4);
697 b64_from_24bit (buf[40], buf[61], buf[19], 4);
698 b64_from_24bit (buf[62], buf[20], buf[41], 4);
699 b64_from_24bit (0, 0, buf[63], 2);
709 EVP_MD_CTX_free(md2);
711 OPENSSL_free(p_bytes);
712 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");
731 if (RAND_bytes((unsigned char *)*salt_p, 2) <= 0)
733 (*salt_p)[0] = cov_2char[(*salt_p)[0] & 0x3f]; /* 6 bits */
734 (*salt_p)[1] = cov_2char[(*salt_p)[1] & 0x3f]; /* 6 bits */
736 # ifdef CHARSET_EBCDIC
737 ascii2ebcdic(*salt_p, *salt_p, 2); /* des_crypt will convert back
741 #endif /* !OPENSSL_NO_DES */
743 if (mode == passwd_md5 || mode == passwd_apr1 || mode == passwd_aixmd5) {
746 if (*salt_malloc_p == NULL)
747 *salt_p = *salt_malloc_p = app_malloc(9, "salt buffer");
748 if (RAND_bytes((unsigned char *)*salt_p, 8) <= 0)
751 for (i = 0; i < 8; i++)
752 (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */
756 if (mode == passwd_sha256 || mode == passwd_sha512) {
759 if (*salt_malloc_p == NULL)
760 *salt_p = *salt_malloc_p = app_malloc(17, "salt buffer");
761 if (RAND_bytes((unsigned char *)*salt_p, 16) <= 0)
764 for (i = 0; i < 16; i++)
765 (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */
770 assert(*salt_p != NULL);
772 /* truncate password if necessary */
773 if ((strlen(passwd) > pw_maxlen)) {
776 * XXX: really we should know how to print a size_t, not cast it
779 "Warning: truncating password to %u characters\n",
780 (unsigned)pw_maxlen);
781 passwd[pw_maxlen] = 0;
783 assert(strlen(passwd) <= pw_maxlen);
785 /* now compute password hash */
786 #ifndef OPENSSL_NO_DES
787 if (mode == passwd_crypt)
788 hash = DES_crypt(passwd, *salt_p);
790 if (mode == passwd_md5 || mode == passwd_apr1)
791 hash = md5crypt(passwd, (mode == passwd_md5 ? "1" : "apr1"), *salt_p);
792 if (mode == passwd_aixmd5)
793 hash = md5crypt(passwd, "", *salt_p);
794 if (mode == passwd_sha256 || mode == passwd_sha512)
795 hash = shacrypt(passwd, (mode == passwd_sha256 ? "5" : "6"), *salt_p);
796 assert(hash != NULL);
798 if (table && !reverse)
799 BIO_printf(out, "%s\t%s\n", passwd, hash);
800 else if (table && reverse)
801 BIO_printf(out, "%s\t%s\n", hash, passwd);
803 BIO_printf(out, "%s\n", hash);