crypto/openssl-0.9/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 #ifndef OPENSSL_NO_DES
  19 # include <openssl/des.h>
  20 #endif
  21 #ifndef NO_MD5CRYPT_1
  22 # include <openssl/md5.h>
  23 #endif
  24
  25
  26 #undef PROG
  27 #define PROG passwd_main
  28
  29
  30 static unsigned const char cov_2char[64]={
  31         /* from crypto/des/fcrypt.c */
  32         0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35,
  33         0x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44,
  34         0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,
  35         0x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54,
  36         0x55,0x56,0x57,0x58,0x59,0x5A,0x61,0x62,
  37         0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,
  38         0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,
  39         0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A
  40 };
  41
  42 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
  43         char *passwd, BIO *out, int quiet, int table, int reverse,
  44         size_t pw_maxlen, int usecrypt, int use1, int useapr1);
  45
  46 /* -crypt        - standard Unix password algorithm (default)
  47  * -1            - MD5-based password algorithm
  48  * -apr1         - MD5-based password algorithm, Apache variant
  49  * -salt string  - salt
  50  * -in file      - read passwords from file
  51  * -stdin        - read passwords from stdin
  52  * -noverify     - never verify when reading password from terminal
  53  * -quiet        - no warnings
  54  * -table        - format output as table
  55  * -reverse      - switch table columns
  56  */
  57
  58 int MAIN(int, char **);
  59
  60 int MAIN(int argc, char **argv)
  61         {
  62         int ret = 1;
  63         char *infile = NULL;
  64         int in_stdin = 0;
  65         int in_noverify = 0;
  66         char *salt = NULL, *passwd = NULL, **passwds = NULL;
  67         char *salt_malloc = NULL, *passwd_malloc = NULL;
  68         size_t passwd_malloc_size = 0;
  69         int pw_source_defined = 0;
  70         BIO *in = NULL, *out = NULL;
  71         int i, badopt, opt_done;
  72         int passed_salt = 0, quiet = 0, table = 0, reverse = 0;
  73         int usecrypt = 0, use1 = 0, useapr1 = 0;
  74         size_t pw_maxlen = 0;
  75
  76         apps_startup();
  77
  78         if (bio_err == NULL)
  79                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
  80                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
  81
  82         if (!load_config(bio_err, NULL))
  83                 goto err;
  84         out = BIO_new(BIO_s_file());
  85         if (out == NULL)
  86                 goto err;
  87         BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
  88 #ifdef OPENSSL_SYS_VMS
  89         {
  90         BIO *tmpbio = BIO_new(BIO_f_linebuffer());
  91         out = BIO_push(tmpbio, out);
  92         }
  93 #endif
  94
  95         badopt = 0, opt_done = 0;
  96         i = 0;
  97         while (!badopt && !opt_done && argv[++i] != NULL)
  98                 {
  99                 if (strcmp(argv[i], "-crypt") == 0)
 100                         usecrypt = 1;
 101                 else if (strcmp(argv[i], "-1") == 0)
 102                         use1 = 1;
 103                 else if (strcmp(argv[i], "-apr1") == 0)
 104                         useapr1 = 1;
 105                 else if (strcmp(argv[i], "-salt") == 0)
 106                         {
 107                         if ((argv[i+1] != NULL) && (salt == NULL))
 108                                 {
 109                                 passed_salt = 1;
 110                                 salt = argv[++i];
 111                                 }
 112                         else
 113                                 badopt = 1;
 114                         }
 115                 else if (strcmp(argv[i], "-in") == 0)
 116                         {
 117                         if ((argv[i+1] != NULL) && !pw_source_defined)
 118                                 {
 119                                 pw_source_defined = 1;
 120                                 infile = argv[++i];
 121                                 }
 122                         else
 123                                 badopt = 1;
 124                         }
 125                 else if (strcmp(argv[i], "-stdin") == 0)
 126                         {
 127                         if (!pw_source_defined)
 128                                 {
 129                                 pw_source_defined = 1;
 130                                 in_stdin = 1;
 131                                 }
 132                         else
 133                                 badopt = 1;
 134                         }
 135                 else if (strcmp(argv[i], "-noverify") == 0)
 136                         in_noverify = 1;
 137                 else if (strcmp(argv[i], "-quiet") == 0)
 138                         quiet = 1;
 139                 else if (strcmp(argv[i], "-table") == 0)
 140                         table = 1;
 141                 else if (strcmp(argv[i], "-reverse") == 0)
 142                         reverse = 1;
 143                 else if (argv[i][0] == '-')
 144                         badopt = 1;
 145                 else if (!pw_source_defined)
 146                         /* non-option arguments, use as passwords */
 147                         {
 148                         pw_source_defined = 1;
 149                         passwds = &argv[i];
 150                         opt_done = 1;
 151                         }
 152                 else
 153                         badopt = 1;
 154                 }
 155
 156         if (!usecrypt && !use1 && !useapr1) /* use default */
 157                 usecrypt = 1;
 158         if (usecrypt + use1 + useapr1 > 1) /* conflict */
 159                 badopt = 1;
 160
 161         /* reject unsupported algorithms */
 162 #ifdef OPENSSL_NO_DES
 163         if (usecrypt) badopt = 1;
 164 #endif
 165 #ifdef NO_MD5CRYPT_1
 166         if (use1 || useapr1) badopt = 1;
 167 #endif
 168
 169         if (badopt)
 170                 {
 171                 BIO_printf(bio_err, "Usage: passwd [options] [passwords]\n");
 172                 BIO_printf(bio_err, "where options are\n");
 173 #ifndef OPENSSL_NO_DES
 174                 BIO_printf(bio_err, "-crypt             standard Unix password algorithm (default)\n");
 175 #endif
 176 #ifndef NO_MD5CRYPT_1
 177                 BIO_printf(bio_err, "-1                 MD5-based password algorithm\n");
 178                 BIO_printf(bio_err, "-apr1              MD5-based password algorithm, Apache variant\n");
 179 #endif
 180                 BIO_printf(bio_err, "-salt string       use provided salt\n");
 181                 BIO_printf(bio_err, "-in file           read passwords from file\n");
 182                 BIO_printf(bio_err, "-stdin             read passwords from stdin\n");
 183                 BIO_printf(bio_err, "-noverify          never verify when reading password from terminal\n");
 184                 BIO_printf(bio_err, "-quiet             no warnings\n");
 185                 BIO_printf(bio_err, "-table             format output as table\n");
 186                 BIO_printf(bio_err, "-reverse           switch table columns\n");
 187
 188                 goto err;
 189                 }
 190
 191         if ((infile != NULL) || in_stdin)
 192                 {
 193                 in = BIO_new(BIO_s_file());
 194                 if (in == NULL)
 195                         goto err;
 196                 if (infile != NULL)
 197                         {
 198                         assert(in_stdin == 0);
 199                         if (BIO_read_filename(in, infile) <= 0)
 200                                 goto err;
 201                         }
 202                 else
 203                         {
 204                         assert(in_stdin);
 205                         BIO_set_fp(in, stdin, BIO_NOCLOSE);
 206                         }
 207                 }
 208
 209         if (usecrypt)
 210                 pw_maxlen = 8;
 211         else if (use1 || useapr1)
 212                 pw_maxlen = 256; /* arbitrary limit, should be enough for most passwords */
 213
 214         if (passwds == NULL)
 215                 {
 216                 /* no passwords on the command line */
 217
 218                 passwd_malloc_size = pw_maxlen + 2;
 219                 /* longer than necessary so that we can warn about truncation */
 220                 passwd = passwd_malloc = OPENSSL_malloc(passwd_malloc_size);
 221                 if (passwd_malloc == NULL)
 222                         goto err;
 223                 }
 224
 225         if ((in == NULL) && (passwds == NULL))
 226                 {
 227                 /* build a null-terminated list */
 228                 static char *passwds_static[2] = {NULL, NULL};
 229
 230                 passwds = passwds_static;
 231                 if (in == NULL)
 232                         if (EVP_read_pw_string(passwd_malloc, passwd_malloc_size, "Password: ", !(passed_salt || in_noverify)) != 0)
 233                                 goto err;
 234                 passwds[0] = passwd_malloc;
 235                 }
 236
 237         if (in == NULL)
 238                 {
 239                 assert(passwds != NULL);
 240                 assert(*passwds != NULL);
 241
 242                 do /* loop over list of passwords */
 243                         {
 244                         passwd = *passwds++;
 245                         if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, out,
 246                                 quiet, table, reverse, pw_maxlen, usecrypt, use1, useapr1))
 247                                 goto err;
 248                         }
 249                 while (*passwds != NULL);
 250                 }
 251         else
 252                 /* in != NULL */
 253                 {
 254                 int done;
 255
 256                 assert (passwd != NULL);
 257                 do
 258                         {
 259                         int r = BIO_gets(in, passwd, pw_maxlen + 1);
 260                         if (r > 0)
 261                                 {
 262                                 char *c = (strchr(passwd, '\n')) ;
 263                                 if (c != NULL)
 264                                         *c = 0; /* truncate at newline */
 265                                 else
 266                                         {
 267                                         /* ignore rest of line */
 268                                         char trash[BUFSIZ];
 269                                         do
 270                                                 r = BIO_gets(in, trash, sizeof trash);
 271                                         while ((r > 0) && (!strchr(trash, '\n')));
 272                                         }
 273
 274                                 if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, out,
 275                                         quiet, table, reverse, pw_maxlen, usecrypt, use1, useapr1))
 276                                         goto err;
 277                                 }
 278                         done = (r <= 0);
 279                         }
 280                 while (!done);
 281                 }
 282         ret = 0;
 283
 284 err:
 285         ERR_print_errors(bio_err);
 286         if (salt_malloc)
 287                 OPENSSL_free(salt_malloc);
 288         if (passwd_malloc)
 289                 OPENSSL_free(passwd_malloc);
 290         if (in)
 291                 BIO_free(in);
 292         if (out)
 293                 BIO_free_all(out);
 294         apps_shutdown();
 295         OPENSSL_EXIT(ret);
 296         }
 297
 298
 299 #ifndef NO_MD5CRYPT_1
 300 /* MD5-based password algorithm (should probably be available as a library
 301  * function; then the static buffer would not be acceptable).
 302  * For magic string "1", this should be compatible to the MD5-based BSD
 303  * password algorithm.
 304  * For 'magic' string "apr1", this is compatible to the MD5-based Apache
 305  * password algorithm.
 306  * (Apparently, the Apache password algorithm is identical except that the
 307  * 'magic' string was changed -- the laziest application of the NIH principle
 308  * I've ever encountered.)
 309  */
 310 static char *md5crypt(const char *passwd, const char *magic, const char *salt)
 311         {
 312         static char out_buf[6 + 9 + 24 + 2]; /* "$apr1$..salt..$.......md5hash..........\0" */
 313         unsigned char buf[MD5_DIGEST_LENGTH];
 314         char *salt_out;
 315         int n;
 316         unsigned int i;
 317         EVP_MD_CTX md,md2;
 318         size_t passwd_len, salt_len;
 319
 320         passwd_len = strlen(passwd);
 321         out_buf[0] = '$';
 322         out_buf[1] = 0;
 323         assert(strlen(magic) <= 4); /* "1" or "apr1" */
 324         strncat(out_buf, magic, 4);
 325         strncat(out_buf, "$", 1);
 326         strncat(out_buf, salt, 8);
 327         assert(strlen(out_buf) <= 6 + 8); /* "$apr1$..salt.." */
 328         salt_out = out_buf + 2 + strlen(magic);
 329         salt_len = strlen(salt_out);
 330         assert(salt_len <= 8);
 331
 332         EVP_MD_CTX_init(&md);
 333         EVP_DigestInit_ex(&md,EVP_md5(), NULL);
 334         EVP_DigestUpdate(&md, passwd, passwd_len);
 335         EVP_DigestUpdate(&md, "$", 1);
 336         EVP_DigestUpdate(&md, magic, strlen(magic));
 337         EVP_DigestUpdate(&md, "$", 1);
 338         EVP_DigestUpdate(&md, salt_out, salt_len);
 339
 340         EVP_MD_CTX_init(&md2);
 341         EVP_DigestInit_ex(&md2,EVP_md5(), NULL);
 342         EVP_DigestUpdate(&md2, passwd, passwd_len);
 343         EVP_DigestUpdate(&md2, salt_out, salt_len);
 344         EVP_DigestUpdate(&md2, passwd, passwd_len);
 345         EVP_DigestFinal_ex(&md2, buf, NULL);
 346
 347         for (i = passwd_len; i > sizeof buf; i -= sizeof buf)
 348                 EVP_DigestUpdate(&md, buf, sizeof buf);
 349         EVP_DigestUpdate(&md, buf, i);
 350
 351         n = passwd_len;
 352         while (n)
 353                 {
 354                 EVP_DigestUpdate(&md, (n & 1) ? "\0" : passwd, 1);
 355                 n >>= 1;
 356                 }
 357         EVP_DigestFinal_ex(&md, buf, NULL);
 358
 359         for (i = 0; i < 1000; i++)
 360                 {
 361                 EVP_DigestInit_ex(&md2,EVP_md5(), NULL);
 362                 EVP_DigestUpdate(&md2, (i & 1) ? (unsigned const char *) passwd : buf,
 363                                        (i & 1) ? passwd_len : sizeof buf);
 364                 if (i % 3)
 365                         EVP_DigestUpdate(&md2, salt_out, salt_len);
 366                 if (i % 7)
 367                         EVP_DigestUpdate(&md2, passwd, passwd_len);
 368                 EVP_DigestUpdate(&md2, (i & 1) ? buf : (unsigned const char *) passwd,
 369                                        (i & 1) ? sizeof buf : passwd_len);
 370                 EVP_DigestFinal_ex(&md2, buf, NULL);
 371                 }
 372         EVP_MD_CTX_cleanup(&md2);
 373
 374          {
 375                 /* transform buf into output string */
 376
 377                 unsigned char buf_perm[sizeof buf];
 378                 int dest, source;
 379                 char *output;
 380
 381                 /* silly output permutation */
 382                 for (dest = 0, source = 0; dest < 14; dest++, source = (source + 6) % 17)
 383                         buf_perm[dest] = buf[source];
 384                 buf_perm[14] = buf[5];
 385                 buf_perm[15] = buf[11];
 386 #ifndef PEDANTIC /* Unfortunately, this generates a "no effect" warning */
 387                 assert(16 == sizeof buf_perm);
 388 #endif
 389
 390                 output = salt_out + salt_len;
 391                 assert(output == out_buf + strlen(out_buf));
 392
 393                 *output++ = '$';
 394
 395                 for (i = 0; i < 15; i += 3)
 396                         {
 397                         *output++ = cov_2char[buf_perm[i+2] & 0x3f];
 398                         *output++ = cov_2char[((buf_perm[i+1] & 0xf) << 2) |
 399                                                   (buf_perm[i+2] >> 6)];
 400                         *output++ = cov_2char[((buf_perm[i] & 3) << 4) |
 401                                                   (buf_perm[i+1] >> 4)];
 402                         *output++ = cov_2char[buf_perm[i] >> 2];
 403                         }
 404                 assert(i == 15);
 405                 *output++ = cov_2char[buf_perm[i] & 0x3f];
 406                 *output++ = cov_2char[buf_perm[i] >> 6];
 407                 *output = 0;
 408                 assert(strlen(out_buf) < sizeof(out_buf));
 409          }
 410         EVP_MD_CTX_cleanup(&md);
 411
 412         return out_buf;
 413         }
 414 #endif
 415
 416
 417 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
 418         char *passwd, BIO *out, int quiet, int table, int reverse,
 419         size_t pw_maxlen, int usecrypt, int use1, int useapr1)
 420         {
 421         char *hash = NULL;
 422
 423         assert(salt_p != NULL);
 424         assert(salt_malloc_p != NULL);
 425
 426         /* first make sure we have a salt */
 427         if (!passed_salt)
 428                 {
 429 #ifndef OPENSSL_NO_DES
 430                 if (usecrypt)
 431                         {
 432                         if (*salt_malloc_p == NULL)
 433                                 {
 434                                 *salt_p = *salt_malloc_p = OPENSSL_malloc(3);
 435                                 if (*salt_malloc_p == NULL)
 436                                         goto err;
 437                                 }
 438                         if (RAND_pseudo_bytes((unsigned char *)*salt_p, 2) < 0)
 439                                 goto err;
 440                         (*salt_p)[0] = cov_2char[(*salt_p)[0] & 0x3f]; /* 6 bits */
 441                         (*salt_p)[1] = cov_2char[(*salt_p)[1] & 0x3f]; /* 6 bits */
 442                         (*salt_p)[2] = 0;
 443 #ifdef CHARSET_EBCDIC
 444                         ascii2ebcdic(*salt_p, *salt_p, 2); /* des_crypt will convert
 445                                                             * back to ASCII */
 446 #endif
 447                         }
 448 #endif /* !OPENSSL_NO_DES */
 449
 450 #ifndef NO_MD5CRYPT_1
 451                 if (use1 || useapr1)
 452                         {
 453                         int i;
 454
 455                         if (*salt_malloc_p == NULL)
 456                                 {
 457                                 *salt_p = *salt_malloc_p = OPENSSL_malloc(9);
 458                                 if (*salt_malloc_p == NULL)
 459                                         goto err;
 460                                 }
 461                         if (RAND_pseudo_bytes((unsigned char *)*salt_p, 8) < 0)
 462                                 goto err;
 463
 464                         for (i = 0; i < 8; i++)
 465                                 (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */
 466                         (*salt_p)[8] = 0;
 467                         }
 468 #endif /* !NO_MD5CRYPT_1 */
 469                 }
 470
 471         assert(*salt_p != NULL);
 472
 473         /* truncate password if necessary */
 474         if ((strlen(passwd) > pw_maxlen))
 475                 {
 476                 if (!quiet)
 477                         /* XXX: really we should know how to print a size_t, not cast it */
 478                         BIO_printf(bio_err, "Warning: truncating password to %u characters\n", (unsigned)pw_maxlen);
 479                 passwd[pw_maxlen] = 0;
 480                 }
 481         assert(strlen(passwd) <= pw_maxlen);
 482
 483         /* now compute password hash */
 484 #ifndef OPENSSL_NO_DES
 485         if (usecrypt)
 486                 hash = DES_crypt(passwd, *salt_p);
 487 #endif
 488 #ifndef NO_MD5CRYPT_1
 489         if (use1 || useapr1)
 490                 hash = md5crypt(passwd, (use1 ? "1" : "apr1"), *salt_p);
 491 #endif
 492         assert(hash != NULL);
 493
 494         if (table && !reverse)
 495                 BIO_printf(out, "%s\t%s\n", passwd, hash);
 496         else if (table && reverse)
 497                 BIO_printf(out, "%s\t%s\n", hash, passwd);
 498         else
 499                 BIO_printf(out, "%s\n", hash);
 500         return 1;
 501
 502 err:
 503         return 0;
 504         }
 505 #else
 506
 507 int MAIN(int argc, char **argv)
 508         {
 509         fputs("Program not available.\n", stderr)
 510         OPENSSL_EXIT(1);
 511         }
 512 #endif