Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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 |