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
50 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
51 char *passwd, BIO *out, int quiet, int table,
52 int reverse, size_t pw_maxlen, int usecrypt, int use1,
53 int useapr1, int use5, int use6);
55 typedef enum OPTION_choice {
56 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
58 OPT_NOVERIFY, OPT_QUIET, OPT_TABLE, OPT_REVERSE, OPT_APR1,
59 OPT_1, OPT_5, OPT_6, OPT_CRYPT, OPT_SALT, OPT_STDIN
62 OPTIONS passwd_options[] = {
63 {"help", OPT_HELP, '-', "Display this summary"},
64 {"in", OPT_IN, '<', "Pead passwords from file"},
65 {"noverify", OPT_NOVERIFY, '-',
66 "Never verify when reading password from terminal"},
67 {"quiet", OPT_QUIET, '-', "No warnings"},
68 {"table", OPT_TABLE, '-', "Format output as table"},
69 {"reverse", OPT_REVERSE, '-', "Switch table columns"},
70 {"salt", OPT_SALT, 's', "Use provided salt"},
71 {"stdin", OPT_STDIN, '-', "Read passwords from stdin"},
73 {"6", OPT_6, '-', "SHA512-based password algorithm"},
74 {"5", OPT_5, '-', "SHA256-based password algorithm"},
76 # ifndef NO_MD5CRYPT_1
77 {"apr1", OPT_APR1, '-', "MD5-based password algorithm, Apache variant"},
78 {"1", OPT_1, '-', "MD5-based password algorithm"},
80 # ifndef OPENSSL_NO_DES
81 {"crypt", OPT_CRYPT, '-', "Standard Unix password algorithm (default)"},
86 int passwd_main(int argc, char **argv)
89 char *infile = NULL, *salt = NULL, *passwd = NULL, **passwds = NULL;
90 char *salt_malloc = NULL, *passwd_malloc = NULL, *prog;
92 int in_stdin = 0, pw_source_defined = 0;
96 int passed_salt = 0, quiet = 0, table = 0, reverse = 0;
97 int ret = 1, usecrypt = 0, use1 = 0, useapr1 = 0, use5 = 0, use6 = 0;
98 size_t passwd_malloc_size = 0, pw_maxlen = 256;
100 prog = opt_init(argc, argv, passwd_options);
101 while ((o = opt_next()) != OPT_EOF) {
106 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
109 opt_help(passwd_options);
113 if (pw_source_defined)
116 pw_source_defined = 1;
119 #ifndef OPENSSL_NO_UI
152 if (pw_source_defined)
155 pw_source_defined = 1;
159 argc = opt_num_rest();
163 if (pw_source_defined)
165 pw_source_defined = 1;
169 if (!usecrypt && !use5 && !use6 && !use1 && !useapr1) {
173 if (usecrypt + use5 + use6 + use1 + useapr1 > 1) {
178 # ifdef OPENSSL_NO_DES
182 # ifdef NO_MD5CRYPT_1
191 if (infile != NULL && in_stdin) {
192 BIO_printf(bio_err, "%s: Can't combine -in and -stdin\n", prog);
196 if (infile != NULL || in_stdin) {
198 * If in_stdin is true, we know that infile is NULL, and that
199 * bio_open_default() will give us back an alias for stdin.
201 in = bio_open_default(infile, 'r', FORMAT_TEXT);
208 else if (use1 || useapr1)
209 pw_maxlen = 256; /* arbitrary limit, should be enough for most
212 if (passwds == NULL) {
213 /* no passwords on the command line */
215 passwd_malloc_size = pw_maxlen + 2;
216 /* longer than necessary so that we can warn about truncation */
217 passwd = passwd_malloc =
218 app_malloc(passwd_malloc_size, "password buffer");
221 if ((in == NULL) && (passwds == NULL)) {
223 #ifndef OPENSSL_NO_UI
224 /* build a null-terminated list */
225 static char *passwds_static[2] = { NULL, NULL };
227 passwds = passwds_static;
229 if (EVP_read_pw_string
230 (passwd_malloc, passwd_malloc_size, "Password: ",
231 !(passed_salt || in_noverify)) != 0)
233 passwds[0] = passwd_malloc;
236 BIO_printf(bio_err, "password required\n");
243 assert(passwds != NULL);
244 assert(*passwds != NULL);
246 do { /* loop over list of passwords */
248 if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, bio_out,
249 quiet, table, reverse, pw_maxlen, usecrypt, use1,
250 useapr1, use5, use6))
253 while (*passwds != NULL);
259 assert(passwd != NULL);
261 int r = BIO_gets(in, passwd, pw_maxlen + 1);
263 char *c = (strchr(passwd, '\n'));
265 *c = 0; /* truncate at newline */
267 /* ignore rest of line */
270 r = BIO_gets(in, trash, sizeof trash);
271 while ((r > 0) && (!strchr(trash, '\n')));
275 (passed_salt, &salt, &salt_malloc, passwd, bio_out, quiet,
276 table, reverse, pw_maxlen, usecrypt, use1, useapr1,
287 ERR_print_errors(bio_err);
288 OPENSSL_free(salt_malloc);
289 OPENSSL_free(passwd_malloc);
294 # ifndef NO_MD5CRYPT_1
296 * MD5-based password algorithm (should probably be available as a library
297 * function; then the static buffer would not be acceptable). For magic
298 * string "1", this should be compatible to the MD5-based BSD password
299 * algorithm. For 'magic' string "apr1", this is compatible to the MD5-based
300 * Apache password algorithm. (Apparently, the Apache password algorithm is
301 * identical except that the 'magic' string was changed -- the laziest
302 * application of the NIH principle I've ever encountered.)
304 static char *md5crypt(const char *passwd, const char *magic, const char *salt)
306 /* "$apr1$..salt..$.......md5hash..........\0" */
307 static char out_buf[6 + 9 + 24 + 2];
308 unsigned char buf[MD5_DIGEST_LENGTH];
312 EVP_MD_CTX *md = NULL, *md2 = NULL;
313 size_t passwd_len, salt_len, magic_len;
315 passwd_len = strlen(passwd);
318 magic_len = strlen(magic);
320 if (magic_len > 4) /* assert it's "1" or "apr1" */
323 OPENSSL_strlcat(out_buf, magic, sizeof out_buf);
324 OPENSSL_strlcat(out_buf, "$", sizeof out_buf);
325 OPENSSL_strlcat(out_buf, salt, sizeof out_buf);
327 if (strlen(out_buf) > 6 + 8) /* assert "$apr1$..salt.." */
330 salt_out = out_buf + 2 + magic_len;
331 salt_len = strlen(salt_out);
336 md = EVP_MD_CTX_new();
338 || !EVP_DigestInit_ex(md, EVP_md5(), NULL)
339 || !EVP_DigestUpdate(md, passwd, passwd_len)
340 || !EVP_DigestUpdate(md, "$", 1)
341 || !EVP_DigestUpdate(md, magic, magic_len)
342 || !EVP_DigestUpdate(md, "$", 1)
343 || !EVP_DigestUpdate(md, salt_out, salt_len))
346 md2 = EVP_MD_CTX_new();
348 || !EVP_DigestInit_ex(md2, EVP_md5(), NULL)
349 || !EVP_DigestUpdate(md2, passwd, passwd_len)
350 || !EVP_DigestUpdate(md2, salt_out, salt_len)
351 || !EVP_DigestUpdate(md2, passwd, passwd_len)
352 || !EVP_DigestFinal_ex(md2, buf, NULL))
355 for (i = passwd_len; i > sizeof buf; i -= sizeof buf) {
356 if (!EVP_DigestUpdate(md, buf, sizeof buf))
359 if (!EVP_DigestUpdate(md, buf, i))
364 if (!EVP_DigestUpdate(md, (n & 1) ? "\0" : passwd, 1))
368 if (!EVP_DigestFinal_ex(md, buf, NULL))
371 for (i = 0; i < 1000; i++) {
372 if (!EVP_DigestInit_ex(md2, EVP_md5(), NULL))
374 if (!EVP_DigestUpdate(md2,
375 (i & 1) ? (unsigned const char *)passwd : buf,
376 (i & 1) ? passwd_len : sizeof buf))
379 if (!EVP_DigestUpdate(md2, salt_out, salt_len))
383 if (!EVP_DigestUpdate(md2, passwd, passwd_len))
386 if (!EVP_DigestUpdate(md2,
387 (i & 1) ? buf : (unsigned const char *)passwd,
388 (i & 1) ? sizeof buf : passwd_len))
390 if (!EVP_DigestFinal_ex(md2, buf, NULL))
393 EVP_MD_CTX_free(md2);
399 /* transform buf into output string */
400 unsigned char buf_perm[sizeof buf];
404 /* silly output permutation */
405 for (dest = 0, source = 0; dest < 14;
406 dest++, source = (source + 6) % 17)
407 buf_perm[dest] = buf[source];
408 buf_perm[14] = buf[5];
409 buf_perm[15] = buf[11];
410 # ifndef PEDANTIC /* Unfortunately, this generates a "no
412 assert(16 == sizeof buf_perm);
415 output = salt_out + salt_len;
416 assert(output == out_buf + strlen(out_buf));
420 for (i = 0; i < 15; i += 3) {
421 *output++ = cov_2char[buf_perm[i + 2] & 0x3f];
422 *output++ = cov_2char[((buf_perm[i + 1] & 0xf) << 2) |
423 (buf_perm[i + 2] >> 6)];
424 *output++ = cov_2char[((buf_perm[i] & 3) << 4) |
425 (buf_perm[i + 1] >> 4)];
426 *output++ = cov_2char[buf_perm[i] >> 2];
429 *output++ = cov_2char[buf_perm[i] & 0x3f];
430 *output++ = cov_2char[buf_perm[i] >> 6];
432 assert(strlen(out_buf) < sizeof(out_buf));
438 EVP_MD_CTX_free(md2);
446 * SHA based password algorithm, describe by Ulrich Drepper here:
447 * https://www.akkadia.org/drepper/SHA-crypt.txt
448 * (note that it's in the public domain)
450 static char *shacrypt(const char *passwd, const char *magic, const char *salt)
452 /* Prefix for optional rounds specification. */
453 static const char rounds_prefix[] = "rounds=";
454 /* Maximum salt string length. */
455 #define SALT_LEN_MAX 16
456 /* Default number of rounds if not explicitly specified. */
457 #define ROUNDS_DEFAULT 5000
458 /* Minimum number of rounds. */
459 #define ROUNDS_MIN 1000
460 /* Maximum number of rounds. */
461 #define ROUNDS_MAX 999999999
463 /* "$6$rounds=<N>$......salt......$...shahash(up to 86 chars)...\0" */
464 static char out_buf[3 + 17 + 17 + 86 + 1];
465 unsigned char buf[SHA512_DIGEST_LENGTH];
466 unsigned char temp_buf[SHA512_DIGEST_LENGTH];
468 char salt_copy[17]; /* Max 16 chars plus '\0' */
470 EVP_MD_CTX *md = NULL, *md2 = NULL;
471 const EVP_MD *sha = NULL;
472 size_t passwd_len, salt_len, magic_len;
473 size_t rounds = 5000; /* Default */
474 char rounds_custom = 0;
475 char *p_bytes = NULL;
476 char *s_bytes = NULL;
479 passwd_len = strlen(passwd);
480 magic_len = strlen(magic);
482 /* assert it's "5" or "6" */
499 if (strncmp(salt, rounds_prefix, sizeof(rounds_prefix) - 1) == 0) {
500 const char *num = salt + sizeof(rounds_prefix) - 1;
502 unsigned long int srounds = strtoul (num, &endp, 10);
505 if (srounds > ROUNDS_MAX)
507 else if (srounds < ROUNDS_MIN)
517 /* The salt gets truncated to 16 chars */
518 OPENSSL_strlcpy(salt_copy, salt, sizeof salt_copy);
519 salt_len = strlen(salt_copy);
522 OPENSSL_strlcat(out_buf, "$", sizeof out_buf);
523 OPENSSL_strlcat(out_buf, magic, sizeof out_buf);
524 OPENSSL_strlcat(out_buf, "$", sizeof out_buf);
526 char tmp_buf[7 + 9 + 1]; /* "rounds=999999999" */
527 sprintf(tmp_buf, "rounds=%lu", rounds);
528 OPENSSL_strlcat(out_buf, tmp_buf, sizeof out_buf);
529 OPENSSL_strlcat(out_buf, "$", sizeof out_buf);
531 OPENSSL_strlcat(out_buf, salt_copy, sizeof out_buf);
533 /* assert "$5$rounds=999999999$......salt......" */
534 if (strlen(out_buf) > 3 + 17 * rounds_custom + salt_len )
537 md = EVP_MD_CTX_new();
539 || !EVP_DigestInit_ex(md, sha, NULL)
540 || !EVP_DigestUpdate(md, passwd, passwd_len)
541 || !EVP_DigestUpdate(md, salt_copy, salt_len))
544 md2 = EVP_MD_CTX_new();
546 || !EVP_DigestInit_ex(md2, sha, NULL)
547 || !EVP_DigestUpdate(md2, passwd, passwd_len)
548 || !EVP_DigestUpdate(md2, salt_copy, salt_len)
549 || !EVP_DigestUpdate(md2, passwd, passwd_len)
550 || !EVP_DigestFinal_ex(md2, buf, NULL))
553 for (n = passwd_len; n > buf_size; n -= buf_size) {
554 if (!EVP_DigestUpdate(md, buf, buf_size))
557 if (!EVP_DigestUpdate(md, buf, n))
562 if (!EVP_DigestUpdate(md,
563 (n & 1) ? buf : (unsigned const char *)passwd,
564 (n & 1) ? buf_size : passwd_len))
568 if (!EVP_DigestFinal_ex(md, buf, NULL))
572 if (!EVP_DigestInit_ex(md2, sha, NULL))
575 for (n = passwd_len; n > 0; n--)
576 if (!EVP_DigestUpdate(md2, passwd, passwd_len))
579 if (!EVP_DigestFinal_ex(md2, temp_buf, NULL))
582 if ((p_bytes = OPENSSL_zalloc(passwd_len)) == NULL)
584 for (cp = p_bytes, n = passwd_len; n > buf_size; n -= buf_size, cp += buf_size)
585 memcpy(cp, temp_buf, buf_size);
586 memcpy(cp, temp_buf, n);
589 if (!EVP_DigestInit_ex(md2, sha, NULL))
592 for (n = 16 + buf[0]; n > 0; n--)
593 if (!EVP_DigestUpdate(md2, salt, salt_len))
596 if (!EVP_DigestFinal_ex(md2, temp_buf, NULL))
599 if ((s_bytes = OPENSSL_zalloc(salt_len)) == NULL)
601 for (cp = s_bytes, n = salt_len; n > buf_size; n -= buf_size, cp += buf_size)
602 memcpy(cp, temp_buf, buf_size);
603 memcpy(cp, temp_buf, n);
605 for (n = 0; n < rounds; n++) {
606 if (!EVP_DigestInit_ex(md2, sha, NULL))
608 if (!EVP_DigestUpdate(md2,
609 (n & 1) ? (unsigned const char *)p_bytes : buf,
610 (n & 1) ? passwd_len : buf_size))
613 if (!EVP_DigestUpdate(md2, s_bytes, salt_len))
617 if (!EVP_DigestUpdate(md2, p_bytes, passwd_len))
620 if (!EVP_DigestUpdate(md2,
621 (n & 1) ? buf : (unsigned const char *)p_bytes,
622 (n & 1) ? buf_size : passwd_len))
624 if (!EVP_DigestFinal_ex(md2, buf, NULL))
627 EVP_MD_CTX_free(md2);
631 OPENSSL_free(p_bytes);
632 OPENSSL_free(s_bytes);
636 cp = out_buf + strlen(out_buf);
639 #define b64_from_24bit(B2, B1, B0, N) \
641 unsigned int w = ((B2) << 16) | ((B1) << 8) | (B0); \
645 *cp++ = cov_2char[w & 0x3f]; \
652 b64_from_24bit (buf[0], buf[10], buf[20], 4);
653 b64_from_24bit (buf[21], buf[1], buf[11], 4);
654 b64_from_24bit (buf[12], buf[22], buf[2], 4);
655 b64_from_24bit (buf[3], buf[13], buf[23], 4);
656 b64_from_24bit (buf[24], buf[4], buf[14], 4);
657 b64_from_24bit (buf[15], buf[25], buf[5], 4);
658 b64_from_24bit (buf[6], buf[16], buf[26], 4);
659 b64_from_24bit (buf[27], buf[7], buf[17], 4);
660 b64_from_24bit (buf[18], buf[28], buf[8], 4);
661 b64_from_24bit (buf[9], buf[19], buf[29], 4);
662 b64_from_24bit (0, buf[31], buf[30], 3);
665 b64_from_24bit (buf[0], buf[21], buf[42], 4);
666 b64_from_24bit (buf[22], buf[43], buf[1], 4);
667 b64_from_24bit (buf[44], buf[2], buf[23], 4);
668 b64_from_24bit (buf[3], buf[24], buf[45], 4);
669 b64_from_24bit (buf[25], buf[46], buf[4], 4);
670 b64_from_24bit (buf[47], buf[5], buf[26], 4);
671 b64_from_24bit (buf[6], buf[27], buf[48], 4);
672 b64_from_24bit (buf[28], buf[49], buf[7], 4);
673 b64_from_24bit (buf[50], buf[8], buf[29], 4);
674 b64_from_24bit (buf[9], buf[30], buf[51], 4);
675 b64_from_24bit (buf[31], buf[52], buf[10], 4);
676 b64_from_24bit (buf[53], buf[11], buf[32], 4);
677 b64_from_24bit (buf[12], buf[33], buf[54], 4);
678 b64_from_24bit (buf[34], buf[55], buf[13], 4);
679 b64_from_24bit (buf[56], buf[14], buf[35], 4);
680 b64_from_24bit (buf[15], buf[36], buf[57], 4);
681 b64_from_24bit (buf[37], buf[58], buf[16], 4);
682 b64_from_24bit (buf[59], buf[17], buf[38], 4);
683 b64_from_24bit (buf[18], buf[39], buf[60], 4);
684 b64_from_24bit (buf[40], buf[61], buf[19], 4);
685 b64_from_24bit (buf[62], buf[20], buf[41], 4);
686 b64_from_24bit (0, 0, buf[63], 2);
696 EVP_MD_CTX_free(md2);
698 OPENSSL_free(p_bytes);
699 OPENSSL_free(s_bytes);
704 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
705 char *passwd, BIO *out, int quiet, int table,
706 int reverse, size_t pw_maxlen, int usecrypt, int use1,
707 int useapr1, int use5, int use6)
711 assert(salt_p != NULL);
712 assert(salt_malloc_p != NULL);
714 /* first make sure we have a salt */
716 # ifndef OPENSSL_NO_DES
718 if (*salt_malloc_p == NULL) {
719 *salt_p = *salt_malloc_p = app_malloc(3, "salt buffer");
721 if (RAND_bytes((unsigned char *)*salt_p, 2) <= 0)
723 (*salt_p)[0] = cov_2char[(*salt_p)[0] & 0x3f]; /* 6 bits */
724 (*salt_p)[1] = cov_2char[(*salt_p)[1] & 0x3f]; /* 6 bits */
726 # ifdef CHARSET_EBCDIC
727 ascii2ebcdic(*salt_p, *salt_p, 2); /* des_crypt will convert back
731 # endif /* !OPENSSL_NO_DES */
733 # ifndef NO_MD5CRYPT_1
734 if (use1 || useapr1) {
737 if (*salt_malloc_p == NULL) {
738 *salt_p = *salt_malloc_p = app_malloc(9, "salt buffer");
740 if (RAND_bytes((unsigned char *)*salt_p, 8) <= 0)
743 for (i = 0; i < 8; i++)
744 (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */
747 # endif /* !NO_MD5CRYPT_1 */
753 if (*salt_malloc_p == NULL) {
754 *salt_p = *salt_malloc_p = app_malloc(17, "salt buffer");
756 if (RAND_bytes((unsigned char *)*salt_p, 16) <= 0)
759 for (i = 0; i < 16; i++)
760 (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */
763 # endif /* !NO_SHACRYPT */
766 assert(*salt_p != NULL);
768 /* truncate password if necessary */
769 if ((strlen(passwd) > pw_maxlen)) {
772 * XXX: really we should know how to print a size_t, not cast it
775 "Warning: truncating password to %u characters\n",
776 (unsigned)pw_maxlen);
777 passwd[pw_maxlen] = 0;
779 assert(strlen(passwd) <= pw_maxlen);
781 /* now compute password hash */
782 # ifndef OPENSSL_NO_DES
784 hash = DES_crypt(passwd, *salt_p);
786 # ifndef NO_MD5CRYPT_1
788 hash = md5crypt(passwd, (use1 ? "1" : "apr1"), *salt_p);
792 hash = shacrypt(passwd, (use5 ? "5" : "6"), *salt_p);
794 assert(hash != NULL);
796 if (table && !reverse)
797 BIO_printf(out, "%s\t%s\n", passwd, hash);
798 else if (table && reverse)
799 BIO_printf(out, "%s\t%s\n", hash, passwd);
801 BIO_printf(out, "%s\n", hash);
809 int passwd_main(int argc, char **argv)
811 BIO_printf(bio_err, "Program not available.\n");