apps/passwd.c

   1 /* apps/passwd.c */
   2
   3 #if defined OPENSSL_NO_MD5 || defined CHARSET_EBCDIC
   4 # define NO_MD5CRYPT_1
   5 #endif
   6
   7 #if !defined(OPENSSL_NO_DES) || !defined(NO_MD5CRYPT_1)
   8
   9 #include <assert.h>
  10 #include <string.h>
  11
  12 #include "apps.h"
  13
  14 #include <openssl/bio.h>
  15 #include <openssl/err.h>
  16 #include <openssl/evp.h>
  17 #include <openssl/rand.h>
  18
  19 #ifndef OPENSSL_NO_DES
  20 # include <openssl/des.h>
  21 #endif
  22 #ifndef NO_MD5CRYPT_1
  23 # include <openssl/md5.h>
  24 #endif
  25
  26
  27 #undef PROG
  28 #define PROG passwd_main
  29
  30
  31 static unsigned const char cov_2char[64]={
  32         /* from crypto/des/fcrypt.c */
  33         0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35,
  34         0x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44,
  35         0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,
  36         0x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54,
  37         0x55,0x56,0x57,0x58,0x59,0x5A,0x61,0x62,
  38         0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,
  39         0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,
  40         0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A
  41 };
  42
  43 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
  44         char *passwd, BIO *out, int quiet, int table, int reverse,
  45         size_t pw_maxlen, int usecrypt, int use1, int useapr1);
  46
  47 /* -crypt        - standard Unix password algorithm (default)
  48  * -1            - MD5-based password algorithm
  49  * -apr1         - MD5-based password algorithm, Apache variant
  50  * -salt string  - salt
  51  * -in file      - read passwords from file
  52  * -stdin        - read passwords from stdin
  53  * -noverify     - never verify when reading password from terminal
  54  * -quiet        - no warnings
  55  * -table        - format output as table
  56  * -reverse      - switch table columns
  57  */
  58
  59 int MAIN(int, char **);
  60
  61 int MAIN(int argc, char **argv)
  62         {
  63         int ret = 1;
  64         char *infile = NULL;
  65         int in_stdin = 0;
  66         int in_noverify = 0;
  67         char *salt = NULL, *passwd = NULL, **passwds = NULL;
  68         char *salt_malloc = NULL, *passwd_malloc = NULL;
  69         size_t passwd_malloc_size = 0;
  70         int pw_source_defined = 0;
  71         BIO *in = NULL, *out = NULL;
  72         int i, badopt, opt_done;
  73         int passed_salt = 0, quiet = 0, table = 0, reverse = 0;
  74         int usecrypt = 0, use1 = 0, useapr1 = 0;
  75         size_t pw_maxlen = 0;
  76
  77         apps_startup();
  78
  79         if (bio_err == NULL)
  80                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
  81                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
  82         out = BIO_new(BIO_s_file());
  83         if (out == NULL)
  84                 goto err;
  85         BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
  86 #ifdef VMS
  87         {
  88         BIO *tmpbio = BIO_new(BIO_f_linebuffer());
  89         out = BIO_push(tmpbio, out);
  90         }
  91 #endif
  92
  93         badopt = 0, opt_done = 0;
  94         i = 0;
  95         while (!badopt && !opt_done && argv[++i] != NULL)
  96                 {
  97                 if (strcmp(argv[i], "-crypt") == 0)
  98                         usecrypt = 1;
  99                 else if (strcmp(argv[i], "-1") == 0)
 100                         use1 = 1;
 101                 else if (strcmp(argv[i], "-apr1") == 0)
 102                         useapr1 = 1;
 103                 else if (strcmp(argv[i], "-salt") == 0)
 104                         {
 105                         if ((argv[i+1] != NULL) && (salt == NULL))
 106                                 {
 107                                 passed_salt = 1;
 108                                 salt = argv[++i];
 109                                 }
 110                         else
 111                                 badopt = 1;
 112                         }
 113                 else if (strcmp(argv[i], "-in") == 0)
 114                         {
 115                         if ((argv[i+1] != NULL) && !pw_source_defined)
 116                                 {
 117                                 pw_source_defined = 1;
 118                                 infile = argv[++i];
 119                                 }
 120                         else
 121                                 badopt = 1;
 122                         }
 123                 else if (strcmp(argv[i], "-stdin") == 0)
 124                         {
 125                         if (!pw_source_defined)
 126                                 {
 127                                 pw_source_defined = 1;
 128                                 in_stdin = 1;
 129                                 }
 130                         else
 131                                 badopt = 1;
 132                         }
 133                 else if (strcmp(argv[i], "-noverify") == 0)
 134                         in_noverify = 1;
 135                 else if (strcmp(argv[i], "-quiet") == 0)
 136                         quiet = 1;
 137                 else if (strcmp(argv[i], "-table") == 0)
 138                         table = 1;
 139                 else if (strcmp(argv[i], "-reverse") == 0)
 140                         reverse = 1;
 141                 else if (argv[i][0] == '-')
 142                         badopt = 1;
 143                 else if (!pw_source_defined)
 144                         /* non-option arguments, use as passwords */
 145                         {
 146                         pw_source_defined = 1;
 147                         passwds = &argv[i];
 148                         opt_done = 1;
 149                         }
 150                 else
 151                         badopt = 1;
 152                 }
 153
 154         if (!usecrypt && !use1 && !useapr1) /* use default */
 155                 usecrypt = 1;
 156         if (usecrypt + use1 + useapr1 > 1) /* conflict */
 157                 badopt = 1;
 158
 159         /* reject unsupported algorithms */
 160 #ifdef OPENSSL_NO_DES
 161         if (usecrypt) badopt = 1;
 162 #endif
 163 #ifdef NO_MD5CRYPT_1
 164         if (use1 || useapr1) badopt = 1;
 165 #endif
 166
 167         if (badopt)
 168                 {
 169                 BIO_printf(bio_err, "Usage: passwd [options] [passwords]\n");
 170                 BIO_printf(bio_err, "where options are\n");
 171 #ifndef OPENSSL_NO_DES
 172                 BIO_printf(bio_err, "-crypt             standard Unix password algorithm (default)\n");
 173 #endif
 174 #ifndef NO_MD5CRYPT_1
 175                 BIO_printf(bio_err, "-1                 MD5-based password algorithm\n");
 176                 BIO_printf(bio_err, "-apr1              MD5-based password algorithm, Apache variant\n");
 177 #endif
 178                 BIO_printf(bio_err, "-salt string       use provided salt\n");
 179                 BIO_printf(bio_err, "-in file           read passwords from file\n");
 180                 BIO_printf(bio_err, "-stdin             read passwords from stdin\n");
 181                 BIO_printf(bio_err, "-noverify          never verify when reading password from terminal\n");
 182                 BIO_printf(bio_err, "-quiet             no warnings\n");
 183                 BIO_printf(bio_err, "-table             format output as table\n");
 184                 BIO_printf(bio_err, "-reverse           switch table columns\n");
 185
 186                 goto err;
 187                 }
 188
 189         if ((infile != NULL) || in_stdin)
 190                 {
 191                 in = BIO_new(BIO_s_file());
 192                 if (in == NULL)
 193                         goto err;
 194                 if (infile != NULL)
 195                         {
 196                         assert(in_stdin == 0);
 197                         if (BIO_read_filename(in, infile) <= 0)
 198                                 goto err;
 199                         }
 200                 else
 201                         {
 202                         assert(in_stdin);
 203                         BIO_set_fp(in, stdin, BIO_NOCLOSE);
 204                         }
 205                 }
 206
 207         if (usecrypt)
 208                 pw_maxlen = 8;
 209         else if (use1 || useapr1)
 210                 pw_maxlen = 256; /* arbitrary limit, should be enough for most passwords */
 211
 212         if (passwds == NULL)
 213                 {
 214                 /* no passwords on the command line */
 215
 216                 passwd_malloc_size = pw_maxlen + 2;
 217                 /* longer than necessary so that we can warn about truncation */
 218                 passwd = passwd_malloc = OPENSSL_malloc(passwd_malloc_size);
 219                 if (passwd_malloc == NULL)
 220                         goto err;
 221                 }
 222
 223         if ((in == NULL) && (passwds == NULL))
 224                 {
 225                 /* build a null-terminated list */
 226                 static char *passwds_static[2] = {NULL, NULL};
 227
 228                 passwds = passwds_static;
 229                 if (in == NULL)
 230                         if (EVP_read_pw_string(passwd_malloc, passwd_malloc_size, "Password: ", !(passed_salt || in_noverify)) != 0)
 231                                 goto err;
 232                 passwds[0] = passwd_malloc;
 233                 }
 234
 235         if (in == NULL)
 236                 {
 237                 assert(passwds != NULL);
 238                 assert(*passwds != NULL);
 239
 240                 do /* loop over list of passwords */
 241                         {
 242                         passwd = *passwds++;
 243                         if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, out,
 244                                 quiet, table, reverse, pw_maxlen, usecrypt, use1, useapr1))
 245                                 goto err;
 246                         }
 247                 while (*passwds != NULL);
 248                 }
 249         else
 250                 /* in != NULL */
 251                 {
 252                 int done;
 253
 254                 assert (passwd != NULL);
 255                 do
 256                         {
 257                         int r = BIO_gets(in, passwd, pw_maxlen + 1);
 258                         if (r > 0)
 259                                 {
 260                                 char *c = (strchr(passwd, '\n')) ;
 261                                 if (c != NULL)
 262                                         *c = 0; /* truncate at newline */
 263                                 else
 264                                         {
 265                                         /* ignore rest of line */
 266                                         char trash[BUFSIZ];
 267                                         do
 268                                                 r = BIO_gets(in, trash, sizeof trash);
 269                                         while ((r > 0) && (!strchr(trash, '\n')));
 270                                         }
 271
 272                                 if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, out,
 273                                         quiet, table, reverse, pw_maxlen, usecrypt, use1, useapr1))
 274                                         goto err;
 275                                 }
 276                         done = (r <= 0);
 277                         }
 278                 while (!done);
 279                 }
 280
 281 err:
 282         ERR_print_errors(bio_err);
 283         if (salt_malloc)
 284                 OPENSSL_free(salt_malloc);
 285         if (passwd_malloc)
 286                 OPENSSL_free(passwd_malloc);
 287         if (in)
 288                 BIO_free(in);
 289         if (out)
 290                 BIO_free_all(out);
 291         EXIT(ret);
 292         }
 293
 294
 295 #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).
 298  * For magic string "1", this should be compatible to the MD5-based BSD
 299  * password algorithm.
 300  * For 'magic' string "apr1", this is compatible to the MD5-based Apache
 301  * password algorithm.
 302  * (Apparently, the Apache password algorithm is identical except that the
 303  * 'magic' string was changed -- the laziest application of the NIH principle
 304  * I've ever encountered.)
 305  */
 306 static char *md5crypt(const char *passwd, const char *magic, const char *salt)
 307         {
 308         static char out_buf[6 + 9 + 24 + 2]; /* "$apr1$..salt..$.......md5hash..........\0" */
 309         unsigned char buf[MD5_DIGEST_LENGTH];
 310         char *salt_out;
 311         int n, i;
 312         MD5_CTX md;
 313         size_t passwd_len, salt_len;
 314
 315         passwd_len = strlen(passwd);
 316         out_buf[0] = '$';
 317         out_buf[1] = 0;
 318         assert(strlen(magic) <= 4); /* "1" or "apr1" */
 319         strncat(out_buf, magic, 4);
 320         strncat(out_buf, "$", 1);
 321         strncat(out_buf, salt, 8);
 322         assert(strlen(out_buf) <= 6 + 8); /* "$apr1$..salt.." */
 323         salt_out = out_buf + 2 + strlen(magic);
 324         salt_len = strlen(salt_out);
 325         assert(salt_len <= 8);
 326
 327         MD5_Init(&md);
 328         MD5_Update(&md, passwd, passwd_len);
 329         MD5_Update(&md, "$", 1);
 330         MD5_Update(&md, magic, strlen(magic));
 331         MD5_Update(&md, "$", 1);
 332         MD5_Update(&md, salt_out, salt_len);
 333
 334          {
 335                 MD5_CTX md2;
 336
 337                 MD5_Init(&md2);
 338                 MD5_Update(&md2, passwd, passwd_len);
 339                 MD5_Update(&md2, salt_out, salt_len);
 340                 MD5_Update(&md2, passwd, passwd_len);
 341                 MD5_Final(buf, &md2);
 342          }
 343         for (i = passwd_len; i > sizeof buf; i -= sizeof buf)
 344                 MD5_Update(&md, buf, sizeof buf);
 345         MD5_Update(&md, buf, i);
 346
 347         n = passwd_len;
 348         while (n)
 349                 {
 350                 MD5_Update(&md, (n & 1) ? "\0" : passwd, 1);
 351                 n >>= 1;
 352                 }
 353         MD5_Final(buf, &md);
 354
 355         for (i = 0; i < 1000; i++)
 356                 {
 357                 MD5_CTX md2;
 358
 359                 MD5_Init(&md2);
 360                 MD5_Update(&md2, (i & 1) ? (unsigned char *) passwd : buf,
 361                                  (i & 1) ? passwd_len : sizeof buf);
 362                 if (i % 3)
 363                         MD5_Update(&md2, salt_out, salt_len);
 364                 if (i % 7)
 365                         MD5_Update(&md2, passwd, passwd_len);
 366                 MD5_Update(&md2, (i & 1) ? buf : (unsigned char *) passwd,
 367                                  (i & 1) ? sizeof buf : passwd_len);
 368                 MD5_Final(buf, &md2);
 369                 }
 370
 371          {
 372                 /* transform buf into output string */
 373
 374                 unsigned char buf_perm[sizeof buf];
 375                 int dest, source;
 376                 char *output;
 377
 378                 /* silly output permutation */
 379                 for (dest = 0, source = 0; dest < 14; dest++, source = (source + 6) % 17)
 380                         buf_perm[dest] = buf[source];
 381                 buf_perm[14] = buf[5];
 382                 buf_perm[15] = buf[11];
 383 #ifndef PEDANTIC /* Unfortunately, this generates a "no effect" warning */
 384                 assert(16 == sizeof buf_perm);
 385 #endif
 386
 387                 output = salt_out + salt_len;
 388                 assert(output == out_buf + strlen(out_buf));
 389
 390                 *output++ = '$';
 391
 392                 for (i = 0; i < 15; i += 3)
 393                         {
 394                         *output++ = cov_2char[buf_perm[i+2] & 0x3f];
 395                         *output++ = cov_2char[((buf_perm[i+1] & 0xf) << 2) |
 396                                                   (buf_perm[i+2] >> 6)];
 397                         *output++ = cov_2char[((buf_perm[i] & 3) << 4) |
 398                                                   (buf_perm[i+1] >> 4)];
 399                         *output++ = cov_2char[buf_perm[i] >> 2];
 400                         }
 401                 assert(i == 15);
 402                 *output++ = cov_2char[buf_perm[i] & 0x3f];
 403                 *output++ = cov_2char[buf_perm[i] >> 6];
 404                 *output = 0;
 405                 assert(strlen(out_buf) < sizeof(out_buf));
 406          }
 407
 408         return out_buf;
 409         }
 410 #endif
 411
 412
 413 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
 414         char *passwd, BIO *out, int quiet, int table, int reverse,
 415         size_t pw_maxlen, int usecrypt, int use1, int useapr1)
 416         {
 417         char *hash = NULL;
 418
 419         assert(salt_p != NULL);
 420         assert(salt_malloc_p != NULL);
 421
 422         /* first make sure we have a salt */
 423         if (!passed_salt)
 424                 {
 425 #ifndef OPENSSL_NO_DES
 426                 if (usecrypt)
 427                         {
 428                         if (*salt_malloc_p == NULL)
 429                                 {
 430                                 *salt_p = *salt_malloc_p = OPENSSL_malloc(3);
 431                                 if (*salt_malloc_p == NULL)
 432                                         goto err;
 433                                 }
 434                         if (RAND_pseudo_bytes((unsigned char *)*salt_p, 2) < 0)
 435                                 goto err;
 436                         (*salt_p)[0] = cov_2char[(*salt_p)[0] & 0x3f]; /* 6 bits */
 437                         (*salt_p)[1] = cov_2char[(*salt_p)[1] & 0x3f]; /* 6 bits */
 438                         (*salt_p)[2] = 0;
 439 #ifdef CHARSET_EBCDIC
 440                         ascii2ebcdic(*salt_p, *salt_p, 2); /* des_crypt will convert
 441                                                             * back to ASCII */
 442 #endif
 443                         }
 444 #endif /* !OPENSSL_NO_DES */
 445
 446 #ifndef NO_MD5CRYPT_1
 447                 if (use1 || useapr1)
 448                         {
 449                         int i;
 450
 451                         if (*salt_malloc_p == NULL)
 452                                 {
 453                                 *salt_p = *salt_malloc_p = OPENSSL_malloc(9);
 454                                 if (*salt_malloc_p == NULL)
 455                                         goto err;
 456                                 }
 457                         if (RAND_pseudo_bytes((unsigned char *)*salt_p, 8) < 0)
 458                                 goto err;
 459
 460                         for (i = 0; i < 8; i++)
 461                                 (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */
 462                         (*salt_p)[8] = 0;
 463                         }
 464 #endif /* !NO_MD5CRYPT_1 */
 465                 }
 466
 467         assert(*salt_p != NULL);
 468
 469         /* truncate password if necessary */
 470         if ((strlen(passwd) > pw_maxlen))
 471                 {
 472                 if (!quiet)
 473                         BIO_printf(bio_err, "Warning: truncating password to %u characters\n", pw_maxlen);
 474                 passwd[pw_maxlen] = 0;
 475                 }
 476         assert(strlen(passwd) <= pw_maxlen);
 477
 478         /* now compute password hash */
 479 #ifndef OPENSSL_NO_DES
 480         if (usecrypt)
 481                 hash = des_crypt(passwd, *salt_p);
 482 #endif
 483 #ifndef NO_MD5CRYPT_1
 484         if (use1 || useapr1)
 485                 hash = md5crypt(passwd, (use1 ? "1" : "apr1"), *salt_p);
 486 #endif
 487         assert(hash != NULL);
 488
 489         if (table && !reverse)
 490                 BIO_printf(out, "%s\t%s\n", passwd, hash);
 491         else if (table && reverse)
 492                 BIO_printf(out, "%s\t%s\n", hash, passwd);
 493         else
 494                 BIO_printf(out, "%s\n", hash);
 495         return 1;
 496
 497 err:
 498         return 0;
 499         }
 500 #else
 501
 502 int MAIN(int argc, char **argv)
 503         {
 504         fputs("Program not available.\n", stderr)
 505         EXIT(1);
 506         }
 507 #endif