apps/passwd.c

   1 /*
   2  * Copyright 2000-2018 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 #ifndef OPENSSL_NO_DES
  20 # include <openssl/des.h>
  21 #endif
  22 #include <openssl/md5.h>
  23 #include <openssl/sha.h>
  24
  25 static unsigned const 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_crypt,
  42     passwd_md5,
  43     passwd_apr1,
  44     passwd_sha256,
  45     passwd_sha512,
  46     passwd_aixmd5
  47 } passwd_modes;
  48
  49 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
  50                      char *passwd, BIO *out, int quiet, int table,
  51                      int reverse, size_t pw_maxlen, passwd_modes mode);
  52
  53 typedef enum OPTION_choice {
  54     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  55     OPT_IN,
  56     OPT_NOVERIFY, OPT_QUIET, OPT_TABLE, OPT_REVERSE, OPT_APR1,
  57     OPT_1, OPT_5, OPT_6, OPT_CRYPT, OPT_AIXMD5, OPT_SALT, OPT_STDIN,
  58     OPT_R_ENUM
  59 } OPTION_CHOICE;
  60
  61 const OPTIONS passwd_options[] = {
  62     {"help", OPT_HELP, '-', "Display this summary"},
  63     {"in", OPT_IN, '<', "Read passwords from file"},
  64     {"noverify", OPT_NOVERIFY, '-',
  65      "Never verify when reading password from terminal"},
  66     {"quiet", OPT_QUIET, '-', "No warnings"},
  67     {"table", OPT_TABLE, '-', "Format output as table"},
  68     {"reverse", OPT_REVERSE, '-', "Switch table columns"},
  69     {"salt", OPT_SALT, 's', "Use provided salt"},
  70     {"stdin", OPT_STDIN, '-', "Read passwords from stdin"},
  71     {"6", OPT_6, '-', "SHA512-based password algorithm"},
  72     {"5", OPT_5, '-', "SHA256-based password algorithm"},
  73     {"apr1", OPT_APR1, '-', "MD5-based password algorithm, Apache variant"},
  74     {"1", OPT_1, '-', "MD5-based password algorithm"},
  75     {"aixmd5", OPT_AIXMD5, '-', "AIX MD5-based password algorithm"},
  76 #ifndef OPENSSL_NO_DES
  77     {"crypt", OPT_CRYPT, '-', "Standard Unix password algorithm (default)"},
  78 #endif
  79     OPT_R_OPTIONS,
  80     {NULL}
  81 };
  82
  83 int passwd_main(int argc, char **argv)
  84 {
  85     BIO *in = NULL;
  86     char *infile = NULL, *salt = NULL, *passwd = NULL, **passwds = NULL;
  87     char *salt_malloc = NULL, *passwd_malloc = NULL, *prog;
  88     OPTION_CHOICE o;
  89     int in_stdin = 0, pw_source_defined = 0;
  90 #ifndef OPENSSL_NO_UI_CONSOLE
  91     int in_noverify = 0;
  92 #endif
  93     int passed_salt = 0, quiet = 0, table = 0, reverse = 0;
  94     int ret = 1;
  95     passwd_modes mode = passwd_unset;
  96     size_t passwd_malloc_size = 0;
  97     size_t pw_maxlen = 256; /* arbitrary limit, should be enough for most
  98                              * passwords */
  99
 100     prog = opt_init(argc, argv, passwd_options);
 101     while ((o = opt_next()) != OPT_EOF) {
 102         switch (o) {
 103         case OPT_EOF:
 104         case OPT_ERR:
 105  opthelp:
 106             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 107             goto end;
 108         case OPT_HELP:
 109             opt_help(passwd_options);
 110             ret = 0;
 111             goto end;
 112         case OPT_IN:
 113             if (pw_source_defined)
 114                 goto opthelp;
 115             infile = opt_arg();
 116             pw_source_defined = 1;
 117             break;
 118         case OPT_NOVERIFY:
 119 #ifndef OPENSSL_NO_UI_CONSOLE
 120             in_noverify = 1;
 121 #endif
 122             break;
 123         case OPT_QUIET:
 124             quiet = 1;
 125             break;
 126         case OPT_TABLE:
 127             table = 1;
 128             break;
 129         case OPT_REVERSE:
 130             reverse = 1;
 131             break;
 132         case OPT_1:
 133             if (mode != passwd_unset)
 134                 goto opthelp;
 135             mode = passwd_md5;
 136             break;
 137         case OPT_5:
 138             if (mode != passwd_unset)
 139                 goto opthelp;
 140             mode = passwd_sha256;
 141             break;
 142         case OPT_6:
 143             if (mode != passwd_unset)
 144                 goto opthelp;
 145             mode = passwd_sha512;
 146             break;
 147         case OPT_APR1:
 148             if (mode != passwd_unset)
 149                 goto opthelp;
 150             mode = passwd_apr1;
 151             break;
 152         case OPT_AIXMD5:
 153             if (mode != passwd_unset)
 154                 goto opthelp;
 155             mode = passwd_aixmd5;
 156             break;
 157         case OPT_CRYPT:
 158 #ifndef OPENSSL_NO_DES
 159             if (mode != passwd_unset)
 160                 goto opthelp;
 161             mode = passwd_crypt;
 162 #endif
 163             break;
 164         case OPT_SALT:
 165             passed_salt = 1;
 166             salt = opt_arg();
 167             break;
 168         case OPT_STDIN:
 169             if (pw_source_defined)
 170                 goto opthelp;
 171             in_stdin = 1;
 172             pw_source_defined = 1;
 173             break;
 174         case OPT_R_CASES:
 175             if (!opt_rand(o))
 176                 goto end;
 177             break;
 178         }
 179     }
 180     argc = opt_num_rest();
 181     argv = opt_rest();
 182
 183     if (*argv != NULL) {
 184         if (pw_source_defined)
 185             goto opthelp;
 186         pw_source_defined = 1;
 187         passwds = argv;
 188     }
 189
 190     if (mode == passwd_unset) {
 191         /* use default */
 192         mode = passwd_crypt;
 193     }
 194
 195 #ifdef OPENSSL_NO_DES
 196     if (mode == passwd_crypt)
 197         goto opthelp;
 198 #endif
 199
 200     if (infile != NULL && in_stdin) {
 201         BIO_printf(bio_err, "%s: Can't combine -in and -stdin\n", prog);
 202         goto end;
 203     }
 204
 205     if (infile != NULL || in_stdin) {
 206         /*
 207          * If in_stdin is true, we know that infile is NULL, and that
 208          * bio_open_default() will give us back an alias for stdin.
 209          */
 210         in = bio_open_default(infile, 'r', FORMAT_TEXT);
 211         if (in == NULL)
 212             goto end;
 213     }
 214
 215     if (mode == passwd_crypt)
 216         pw_maxlen = 8;
 217
 218     if (passwds == NULL) {
 219         /* no passwords on the command line */
 220
 221         passwd_malloc_size = pw_maxlen + 2;
 222         /* longer than necessary so that we can warn about truncation */
 223         passwd = passwd_malloc =
 224             app_malloc(passwd_malloc_size, "password buffer");
 225     }
 226
 227     if ((in == NULL) && (passwds == NULL)) {
 228         /*
 229          * we use the following method to make sure what
 230          * in the 'else' section is always compiled, to
 231          * avoid rot of not-frequently-used code.
 232          */
 233         if (1) {
 234 #ifndef OPENSSL_NO_UI_CONSOLE
 235             /* build a null-terminated list */
 236             static char *passwds_static[2] = { NULL, NULL };
 237
 238             passwds = passwds_static;
 239             if (in == NULL) {
 240                 if (EVP_read_pw_string
 241                     (passwd_malloc, passwd_malloc_size, "Password: ",
 242                      !(passed_salt || in_noverify)) != 0)
 243                     goto end;
 244             }
 245             passwds[0] = passwd_malloc;
 246         } else {
 247 #endif
 248             BIO_printf(bio_err, "password required\n");
 249             goto end;
 250         }
 251     }
 252
 253     if (in == NULL) {
 254         assert(passwds != NULL);
 255         assert(*passwds != NULL);
 256
 257         do {                    /* loop over list of passwords */
 258             passwd = *passwds++;
 259             if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, bio_out,
 260                            quiet, table, reverse, pw_maxlen, mode))
 261                 goto end;
 262         } while (*passwds != NULL);
 263     } else {
 264         /* in != NULL */
 265         int done;
 266
 267         assert(passwd != NULL);
 268         do {
 269             int r = BIO_gets(in, passwd, pw_maxlen + 1);
 270             if (r > 0) {
 271                 char *c = (strchr(passwd, '\n'));
 272                 if (c != NULL) {
 273                     *c = 0;     /* truncate at newline */
 274                 } else {
 275                     /* ignore rest of line */
 276                     char trash[BUFSIZ];
 277                     do
 278                         r = BIO_gets(in, trash, sizeof(trash));
 279                     while ((r > 0) && (!strchr(trash, '\n')));
 280                 }
 281
 282                 if (!do_passwd
 283                     (passed_salt, &salt, &salt_malloc, passwd, bio_out, quiet,
 284                      table, reverse, pw_maxlen, mode))
 285                     goto end;
 286             }
 287             done = (r <= 0);
 288         } while (!done);
 289     }
 290     ret = 0;
 291
 292  end:
 293 #if 0
 294     ERR_print_errors(bio_err);
 295 #endif
 296     OPENSSL_free(salt_malloc);
 297     OPENSSL_free(passwd_malloc);
 298     BIO_free(in);
 299     return ret;
 300 }
 301
 302 /*
 303  * MD5-based password algorithm (should probably be available as a library
 304  * function; then the static buffer would not be acceptable). For magic
 305  * string "1", this should be compatible to the MD5-based BSD password
 306  * algorithm. For 'magic' string "apr1", this is compatible to the MD5-based
 307  * Apache password algorithm. (Apparently, the Apache password algorithm is
 308  * identical except that the 'magic' string was changed -- the laziest
 309  * application of the NIH principle I've ever encountered.)
 310  */
 311 static char *md5crypt(const char *passwd, const char *magic, const char *salt)
 312 {
 313     /* "$apr1$..salt..$.......md5hash..........\0" */
 314     static char out_buf[6 + 9 + 24 + 2];
 315     unsigned char buf[MD5_DIGEST_LENGTH];
 316     char ascii_magic[5];         /* "apr1" plus '\0' */
 317     char ascii_salt[9];          /* Max 8 chars plus '\0' */
 318     char *ascii_passwd = NULL;
 319     char *salt_out;
 320     int n;
 321     unsigned int i;
 322     EVP_MD_CTX *md = NULL, *md2 = NULL;
 323     size_t passwd_len, salt_len, magic_len;
 324
 325     passwd_len = strlen(passwd);
 326
 327     out_buf[0] = 0;
 328     magic_len = strlen(magic);
 329     OPENSSL_strlcpy(ascii_magic, magic, sizeof(ascii_magic));
 330 #ifdef CHARSET_EBCDIC
 331     if ((magic[0] & 0x80) != 0)    /* High bit is 1 in EBCDIC alnums */
 332         ebcdic2ascii(ascii_magic, ascii_magic, magic_len);
 333 #endif
 334
 335     /* The salt gets truncated to 8 chars */
 336     OPENSSL_strlcpy(ascii_salt, salt, sizeof(ascii_salt));
 337     salt_len = strlen(ascii_salt);
 338 #ifdef CHARSET_EBCDIC
 339     ebcdic2ascii(ascii_salt, ascii_salt, salt_len);
 340 #endif
 341
 342 #ifdef CHARSET_EBCDIC
 343     ascii_passwd = OPENSSL_strdup(passwd);
 344     if (ascii_passwd == NULL)
 345         return NULL;
 346     ebcdic2ascii(ascii_passwd, ascii_passwd, passwd_len);
 347     passwd = ascii_passwd;
 348 #endif
 349
 350     if (magic_len > 0) {
 351         OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf));
 352
 353         if (magic_len > 4)    /* assert it's  "1" or "apr1" */
 354             goto err;
 355
 356         OPENSSL_strlcat(out_buf, ascii_magic, sizeof(out_buf));
 357         OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf));
 358     }
 359
 360     OPENSSL_strlcat(out_buf, ascii_salt, sizeof(out_buf));
 361
 362     if (strlen(out_buf) > 6 + 8) /* assert "$apr1$..salt.." */
 363         goto err;
 364
 365     salt_out = out_buf;
 366     if (magic_len > 0)
 367         salt_out += 2 + magic_len;
 368
 369     if (salt_len > 8)
 370         goto err;
 371
 372     md = EVP_MD_CTX_new();
 373     if (md == NULL
 374         || !EVP_DigestInit_ex(md, EVP_md5(), NULL)
 375         || !EVP_DigestUpdate(md, passwd, passwd_len))
 376         goto err;
 377
 378     if (magic_len > 0)
 379         if (!EVP_DigestUpdate(md, ascii_dollar, 1)
 380             || !EVP_DigestUpdate(md, ascii_magic, magic_len)
 381             || !EVP_DigestUpdate(md, ascii_dollar, 1))
 382           goto err;
 383
 384     if (!EVP_DigestUpdate(md, ascii_salt, salt_len))
 385         goto err;
 386
 387     md2 = EVP_MD_CTX_new();
 388     if (md2 == NULL
 389         || !EVP_DigestInit_ex(md2, EVP_md5(), NULL)
 390         || !EVP_DigestUpdate(md2, passwd, passwd_len)
 391         || !EVP_DigestUpdate(md2, ascii_salt, salt_len)
 392         || !EVP_DigestUpdate(md2, passwd, passwd_len)
 393         || !EVP_DigestFinal_ex(md2, buf, NULL))
 394         goto err;
 395
 396     for (i = passwd_len; i > sizeof(buf); i -= sizeof(buf)) {
 397         if (!EVP_DigestUpdate(md, buf, sizeof(buf)))
 398             goto err;
 399     }
 400     if (!EVP_DigestUpdate(md, buf, i))
 401         goto err;
 402
 403     n = passwd_len;
 404     while (n) {
 405         if (!EVP_DigestUpdate(md, (n & 1) ? "\0" : passwd, 1))
 406             goto err;
 407         n >>= 1;
 408     }
 409     if (!EVP_DigestFinal_ex(md, buf, NULL))
 410         return NULL;
 411
 412     for (i = 0; i < 1000; i++) {
 413         if (!EVP_DigestInit_ex(md2, EVP_md5(), NULL))
 414             goto err;
 415         if (!EVP_DigestUpdate(md2,
 416                               (i & 1) ? (unsigned const char *)passwd : buf,
 417                               (i & 1) ? passwd_len : sizeof(buf)))
 418             goto err;
 419         if (i % 3) {
 420             if (!EVP_DigestUpdate(md2, ascii_salt, salt_len))
 421                 goto err;
 422         }
 423         if (i % 7) {
 424             if (!EVP_DigestUpdate(md2, passwd, passwd_len))
 425                 goto err;
 426         }
 427         if (!EVP_DigestUpdate(md2,
 428                               (i & 1) ? buf : (unsigned const char *)passwd,
 429                               (i & 1) ? sizeof(buf) : passwd_len))
 430                 goto err;
 431         if (!EVP_DigestFinal_ex(md2, buf, NULL))
 432                 goto err;
 433     }
 434     EVP_MD_CTX_free(md2);
 435     EVP_MD_CTX_free(md);
 436     md2 = NULL;
 437     md = NULL;
 438
 439     {
 440         /* transform buf into output string */
 441         unsigned char buf_perm[sizeof(buf)];
 442         int dest, source;
 443         char *output;
 444
 445         /* silly output permutation */
 446         for (dest = 0, source = 0; dest < 14;
 447              dest++, source = (source + 6) % 17)
 448             buf_perm[dest] = buf[source];
 449         buf_perm[14] = buf[5];
 450         buf_perm[15] = buf[11];
 451 # ifndef PEDANTIC              /* Unfortunately, this generates a "no
 452                                  * effect" warning */
 453         assert(16 == sizeof(buf_perm));
 454 # endif
 455
 456         output = salt_out + salt_len;
 457         assert(output == out_buf + strlen(out_buf));
 458
 459         *output++ = ascii_dollar[0];
 460
 461         for (i = 0; i < 15; i += 3) {
 462             *output++ = cov_2char[buf_perm[i + 2] & 0x3f];
 463             *output++ = cov_2char[((buf_perm[i + 1] & 0xf) << 2) |
 464                                   (buf_perm[i + 2] >> 6)];
 465             *output++ = cov_2char[((buf_perm[i] & 3) << 4) |
 466                                   (buf_perm[i + 1] >> 4)];
 467             *output++ = cov_2char[buf_perm[i] >> 2];
 468         }
 469         assert(i == 15);
 470         *output++ = cov_2char[buf_perm[i] & 0x3f];
 471         *output++ = cov_2char[buf_perm[i] >> 6];
 472         *output = 0;
 473         assert(strlen(out_buf) < sizeof(out_buf));
 474 #ifdef CHARSET_EBCDIC
 475         ascii2ebcdic(out_buf, out_buf, strlen(out_buf));
 476 #endif
 477     }
 478
 479     return out_buf;
 480
 481  err:
 482     OPENSSL_free(ascii_passwd);
 483     EVP_MD_CTX_free(md2);
 484     EVP_MD_CTX_free(md);
 485     return NULL;
 486 }
 487
 488 /*
 489  * SHA based password algorithm, describe by Ulrich Drepper here:
 490  * https://www.akkadia.org/drepper/SHA-crypt.txt
 491  * (note that it's in the public domain)
 492  */
 493 static char *shacrypt(const char *passwd, const char *magic, const char *salt)
 494 {
 495     /* Prefix for optional rounds specification.  */
 496     static const char rounds_prefix[] = "rounds=";
 497     /* Maximum salt string length.  */
 498 # define SALT_LEN_MAX 16
 499     /* Default number of rounds if not explicitly specified.  */
 500 # define ROUNDS_DEFAULT 5000
 501     /* Minimum number of rounds.  */
 502 # define ROUNDS_MIN 1000
 503     /* Maximum number of rounds.  */
 504 # define ROUNDS_MAX 999999999
 505
 506     /* "$6$rounds=<N>$......salt......$...shahash(up to 86 chars)...\0" */
 507     static char out_buf[3 + 17 + 17 + 86 + 1];
 508     unsigned char buf[SHA512_DIGEST_LENGTH];
 509     unsigned char temp_buf[SHA512_DIGEST_LENGTH];
 510     size_t buf_size = 0;
 511     char ascii_magic[2];
 512     char ascii_salt[17];          /* Max 16 chars plus '\0' */
 513     char *ascii_passwd = NULL;
 514     size_t n;
 515     EVP_MD_CTX *md = NULL, *md2 = NULL;
 516     const EVP_MD *sha = NULL;
 517     size_t passwd_len, salt_len, magic_len;
 518     unsigned int rounds = 5000;        /* Default */
 519     char rounds_custom = 0;
 520     char *p_bytes = NULL;
 521     char *s_bytes = NULL;
 522     char *cp = NULL;
 523
 524     passwd_len = strlen(passwd);
 525     magic_len = strlen(magic);
 526
 527     /* assert it's "5" or "6" */
 528     if (magic_len != 1)
 529         return NULL;
 530
 531     switch (magic[0]) {
 532     case '5':
 533         sha = EVP_sha256();
 534         buf_size = 32;
 535         break;
 536     case '6':
 537         sha = EVP_sha512();
 538         buf_size = 64;
 539         break;
 540     default:
 541         return NULL;
 542     }
 543
 544     if (strncmp(salt, rounds_prefix, sizeof(rounds_prefix) - 1) == 0) {
 545         const char *num = salt + sizeof(rounds_prefix) - 1;
 546         char *endp;
 547         unsigned long int srounds = strtoul (num, &endp, 10);
 548         if (*endp == '$') {
 549             salt = endp + 1;
 550             if (srounds > ROUNDS_MAX)
 551                 rounds = ROUNDS_MAX;
 552             else if (srounds < ROUNDS_MIN)
 553                 rounds = ROUNDS_MIN;
 554             else
 555                 rounds = (unsigned int)srounds;
 556             rounds_custom = 1;
 557         } else {
 558             return NULL;
 559         }
 560     }
 561
 562     OPENSSL_strlcpy(ascii_magic, magic, sizeof(ascii_magic));
 563 #ifdef CHARSET_EBCDIC
 564     if ((magic[0] & 0x80) != 0)    /* High bit is 1 in EBCDIC alnums */
 565         ebcdic2ascii(ascii_magic, ascii_magic, magic_len);
 566 #endif
 567
 568     /* The salt gets truncated to 16 chars */
 569     OPENSSL_strlcpy(ascii_salt, salt, sizeof(ascii_salt));
 570     salt_len = strlen(ascii_salt);
 571 #ifdef CHARSET_EBCDIC
 572     ebcdic2ascii(ascii_salt, ascii_salt, salt_len);
 573 #endif
 574
 575 #ifdef CHARSET_EBCDIC
 576     ascii_passwd = OPENSSL_strdup(passwd);
 577     if (ascii_passwd == NULL)
 578         return NULL;
 579     ebcdic2ascii(ascii_passwd, ascii_passwd, passwd_len);
 580     passwd = ascii_passwd;
 581 #endif
 582
 583     out_buf[0] = 0;
 584     OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf));
 585     OPENSSL_strlcat(out_buf, ascii_magic, sizeof(out_buf));
 586     OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf));
 587     if (rounds_custom) {
 588         char tmp_buf[80]; /* "rounds=999999999" */
 589         sprintf(tmp_buf, "rounds=%u", rounds);
 590 #ifdef CHARSET_EBCDIC
 591         /* In case we're really on a ASCII based platform and just pretend */
 592         if (tmp_buf[0] != 0x72)  /* ASCII 'r' */
 593             ebcdic2ascii(tmp_buf, tmp_buf, strlen(tmp_buf));
 594 #endif
 595         OPENSSL_strlcat(out_buf, tmp_buf, sizeof(out_buf));
 596         OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf));
 597     }
 598     OPENSSL_strlcat(out_buf, ascii_salt, sizeof(out_buf));
 599
 600     /* assert "$5$rounds=999999999$......salt......" */
 601     if (strlen(out_buf) > 3 + 17 * rounds_custom + salt_len )
 602         goto err;
 603
 604     md = EVP_MD_CTX_new();
 605     if (md == NULL
 606         || !EVP_DigestInit_ex(md, sha, NULL)
 607         || !EVP_DigestUpdate(md, passwd, passwd_len)
 608         || !EVP_DigestUpdate(md, ascii_salt, salt_len))
 609         goto err;
 610
 611     md2 = EVP_MD_CTX_new();
 612     if (md2 == NULL
 613         || !EVP_DigestInit_ex(md2, sha, NULL)
 614         || !EVP_DigestUpdate(md2, passwd, passwd_len)
 615         || !EVP_DigestUpdate(md2, ascii_salt, salt_len)
 616         || !EVP_DigestUpdate(md2, passwd, passwd_len)
 617         || !EVP_DigestFinal_ex(md2, buf, NULL))
 618         goto err;
 619
 620     for (n = passwd_len; n > buf_size; n -= buf_size) {
 621         if (!EVP_DigestUpdate(md, buf, buf_size))
 622             goto err;
 623     }
 624     if (!EVP_DigestUpdate(md, buf, n))
 625         goto err;
 626
 627     n = passwd_len;
 628     while (n) {
 629         if (!EVP_DigestUpdate(md,
 630                               (n & 1) ? buf : (unsigned const char *)passwd,
 631                               (n & 1) ? buf_size : passwd_len))
 632             goto err;
 633         n >>= 1;
 634     }
 635     if (!EVP_DigestFinal_ex(md, buf, NULL))
 636         return NULL;
 637
 638     /* P sequence */
 639     if (!EVP_DigestInit_ex(md2, sha, NULL))
 640         goto err;
 641
 642     for (n = passwd_len; n > 0; n--)
 643         if (!EVP_DigestUpdate(md2, passwd, passwd_len))
 644             goto err;
 645
 646     if (!EVP_DigestFinal_ex(md2, temp_buf, NULL))
 647         return NULL;
 648
 649     if ((p_bytes = OPENSSL_zalloc(passwd_len)) == NULL)
 650         goto err;
 651     for (cp = p_bytes, n = passwd_len; n > buf_size; n -= buf_size, cp += buf_size)
 652         memcpy(cp, temp_buf, buf_size);
 653     memcpy(cp, temp_buf, n);
 654
 655     /* S sequence */
 656     if (!EVP_DigestInit_ex(md2, sha, NULL))
 657         goto err;
 658
 659     for (n = 16 + buf[0]; n > 0; n--)
 660         if (!EVP_DigestUpdate(md2, ascii_salt, salt_len))
 661             goto err;
 662
 663     if (!EVP_DigestFinal_ex(md2, temp_buf, NULL))
 664         return NULL;
 665
 666     if ((s_bytes = OPENSSL_zalloc(salt_len)) == NULL)
 667         goto err;
 668     for (cp = s_bytes, n = salt_len; n > buf_size; n -= buf_size, cp += buf_size)
 669         memcpy(cp, temp_buf, buf_size);
 670     memcpy(cp, temp_buf, n);
 671
 672     for (n = 0; n < rounds; n++) {
 673         if (!EVP_DigestInit_ex(md2, sha, NULL))
 674             goto err;
 675         if (!EVP_DigestUpdate(md2,
 676                               (n & 1) ? (unsigned const char *)p_bytes : buf,
 677                               (n & 1) ? passwd_len : buf_size))
 678             goto err;
 679         if (n % 3) {
 680             if (!EVP_DigestUpdate(md2, s_bytes, salt_len))
 681                 goto err;
 682         }
 683         if (n % 7) {
 684             if (!EVP_DigestUpdate(md2, p_bytes, passwd_len))
 685                 goto err;
 686         }
 687         if (!EVP_DigestUpdate(md2,
 688                               (n & 1) ? buf : (unsigned const char *)p_bytes,
 689                               (n & 1) ? buf_size : passwd_len))
 690                 goto err;
 691         if (!EVP_DigestFinal_ex(md2, buf, NULL))
 692                 goto err;
 693     }
 694     EVP_MD_CTX_free(md2);
 695     EVP_MD_CTX_free(md);
 696     md2 = NULL;
 697     md = NULL;
 698     OPENSSL_free(p_bytes);
 699     OPENSSL_free(s_bytes);
 700     p_bytes = NULL;
 701     s_bytes = NULL;
 702
 703     cp = out_buf + strlen(out_buf);
 704     *cp++ = ascii_dollar[0];
 705
 706 # define b64_from_24bit(B2, B1, B0, N)                                   \
 707     do {                                                                \
 708         unsigned int w = ((B2) << 16) | ((B1) << 8) | (B0);             \
 709         int i = (N);                                                    \
 710         while (i-- > 0)                                                 \
 711             {                                                           \
 712                 *cp++ = cov_2char[w & 0x3f];                            \
 713                 w >>= 6;                                                \
 714             }                                                           \
 715     } while (0)
 716
 717     switch (magic[0]) {
 718     case '5':
 719         b64_from_24bit (buf[0], buf[10], buf[20], 4);
 720         b64_from_24bit (buf[21], buf[1], buf[11], 4);
 721         b64_from_24bit (buf[12], buf[22], buf[2], 4);
 722         b64_from_24bit (buf[3], buf[13], buf[23], 4);
 723         b64_from_24bit (buf[24], buf[4], buf[14], 4);
 724         b64_from_24bit (buf[15], buf[25], buf[5], 4);
 725         b64_from_24bit (buf[6], buf[16], buf[26], 4);
 726         b64_from_24bit (buf[27], buf[7], buf[17], 4);
 727         b64_from_24bit (buf[18], buf[28], buf[8], 4);
 728         b64_from_24bit (buf[9], buf[19], buf[29], 4);
 729         b64_from_24bit (0, buf[31], buf[30], 3);
 730         break;
 731     case '6':
 732         b64_from_24bit (buf[0], buf[21], buf[42], 4);
 733         b64_from_24bit (buf[22], buf[43], buf[1], 4);
 734         b64_from_24bit (buf[44], buf[2], buf[23], 4);
 735         b64_from_24bit (buf[3], buf[24], buf[45], 4);
 736         b64_from_24bit (buf[25], buf[46], buf[4], 4);
 737         b64_from_24bit (buf[47], buf[5], buf[26], 4);
 738         b64_from_24bit (buf[6], buf[27], buf[48], 4);
 739         b64_from_24bit (buf[28], buf[49], buf[7], 4);
 740         b64_from_24bit (buf[50], buf[8], buf[29], 4);
 741         b64_from_24bit (buf[9], buf[30], buf[51], 4);
 742         b64_from_24bit (buf[31], buf[52], buf[10], 4);
 743         b64_from_24bit (buf[53], buf[11], buf[32], 4);
 744         b64_from_24bit (buf[12], buf[33], buf[54], 4);
 745         b64_from_24bit (buf[34], buf[55], buf[13], 4);
 746         b64_from_24bit (buf[56], buf[14], buf[35], 4);
 747         b64_from_24bit (buf[15], buf[36], buf[57], 4);
 748         b64_from_24bit (buf[37], buf[58], buf[16], 4);
 749         b64_from_24bit (buf[59], buf[17], buf[38], 4);
 750         b64_from_24bit (buf[18], buf[39], buf[60], 4);
 751         b64_from_24bit (buf[40], buf[61], buf[19], 4);
 752         b64_from_24bit (buf[62], buf[20], buf[41], 4);
 753         b64_from_24bit (0, 0, buf[63], 2);
 754         break;
 755     default:
 756         goto err;
 757     }
 758     *cp = '\0';
 759 #ifdef CHARSET_EBCDIC
 760     ascii2ebcdic(out_buf, out_buf, strlen(out_buf));
 761 #endif
 762
 763     return out_buf;
 764
 765  err:
 766     EVP_MD_CTX_free(md2);
 767     EVP_MD_CTX_free(md);
 768     OPENSSL_free(p_bytes);
 769     OPENSSL_free(s_bytes);
 770     OPENSSL_free(ascii_passwd);
 771     return NULL;
 772 }
 773
 774 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
 775                      char *passwd, BIO *out, int quiet, int table,
 776                      int reverse, size_t pw_maxlen, passwd_modes mode)
 777 {
 778     char *hash = NULL;
 779
 780     assert(salt_p != NULL);
 781     assert(salt_malloc_p != NULL);
 782
 783     /* first make sure we have a salt */
 784     if (!passed_salt) {
 785         size_t saltlen = 0;
 786         size_t i;
 787
 788 #ifndef OPENSSL_NO_DES
 789         if (mode == passwd_crypt)
 790             saltlen = 2;
 791 #endif                         /* !OPENSSL_NO_DES */
 792
 793         if (mode == passwd_md5 || mode == passwd_apr1 || mode == passwd_aixmd5)
 794             saltlen = 8;
 795
 796         if (mode == passwd_sha256 || mode == passwd_sha512)
 797             saltlen = 16;
 798
 799         assert(saltlen != 0);
 800
 801         if (*salt_malloc_p == NULL)
 802             *salt_p = *salt_malloc_p = app_malloc(saltlen + 1, "salt buffer");
 803         if (RAND_bytes((unsigned char *)*salt_p, saltlen) <= 0)
 804             goto end;
 805
 806         for (i = 0; i < saltlen; i++)
 807             (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */
 808         (*salt_p)[i] = 0;
 809 # ifdef CHARSET_EBCDIC
 810         /* The password encryption funtion will convert back to ASCII */
 811         ascii2ebcdic(*salt_p, *salt_p, saltlen);
 812 # endif
 813     }
 814
 815     assert(*salt_p != NULL);
 816
 817     /* truncate password if necessary */
 818     if ((strlen(passwd) > pw_maxlen)) {
 819         if (!quiet)
 820             /*
 821              * XXX: really we should know how to print a size_t, not cast it
 822              */
 823             BIO_printf(bio_err,
 824                        "Warning: truncating password to %u characters\n",
 825                        (unsigned)pw_maxlen);
 826         passwd[pw_maxlen] = 0;
 827     }
 828     assert(strlen(passwd) <= pw_maxlen);
 829
 830     /* now compute password hash */
 831 #ifndef OPENSSL_NO_DES
 832     if (mode == passwd_crypt)
 833         hash = DES_crypt(passwd, *salt_p);
 834 #endif
 835     if (mode == passwd_md5 || mode == passwd_apr1)
 836         hash = md5crypt(passwd, (mode == passwd_md5 ? "1" : "apr1"), *salt_p);
 837     if (mode == passwd_aixmd5)
 838         hash = md5crypt(passwd, "", *salt_p);
 839     if (mode == passwd_sha256 || mode == passwd_sha512)
 840         hash = shacrypt(passwd, (mode == passwd_sha256 ? "5" : "6"), *salt_p);
 841     assert(hash != NULL);
 842
 843     if (table && !reverse)
 844         BIO_printf(out, "%s\t%s\n", passwd, hash);
 845     else if (table && reverse)
 846         BIO_printf(out, "%s\t%s\n", hash, passwd);
 847     else
 848         BIO_printf(out, "%s\n", hash);
 849     return 1;
 850
 851  end:
 852     return 0;
 853 }