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 513