1 /* apps/passwd.c */ 2 3 #if defined NO_MD5 || defined CHARSET_EBCDIC 4 # define NO_MD5CRYPT_1 5 #endif 6 7 #if !defined(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 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 * -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 char *salt = NULL, *passwd = NULL, **passwds = NULL; 66 char *salt_malloc = NULL, *passwd_malloc = NULL; 67 size_t passwd_malloc_size = 0; 68 int pw_source_defined = 0; 69 BIO *in = NULL, *out = NULL; 70 int i, badopt, opt_done; 71 int passed_salt = 0, quiet = 0, table = 0, reverse = 0; 72 int usecrypt = 0, use1 = 0, useapr1 = 0; 73 size_t pw_maxlen = 0; 74 75 apps_startup(); 76 77 if (bio_err == NULL) 78 if ((bio_err=BIO_new(BIO_s_file())) != NULL) 79 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); 80 out = BIO_new(BIO_s_file()); 81 if (out == NULL) 82 goto err; 83 BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT); 84 #ifdef VMS 85 { 86 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 87 out = BIO_push(tmpbio, out); 88 } 89 #endif 90 91 badopt = 0, opt_done = 0; 92 i = 0; 93 while (!badopt && !opt_done && argv[++i] != NULL) 94 { 95 if (strcmp(argv[i], "-crypt") == 0) 96 usecrypt = 1; 97 else if (strcmp(argv[i], "-1") == 0) 98 use1 = 1; 99 else if (strcmp(argv[i], "-apr1") == 0) 100 useapr1 = 1; 101 else if (strcmp(argv[i], "-salt") == 0) 102 { 103 if ((argv[i+1] != NULL) && (salt == NULL)) 104 { 105 passed_salt = 1; 106 salt = argv[++i]; 107 } 108 else 109 badopt = 1; 110 } 111 else if (strcmp(argv[i], "-in") == 0) 112 { 113 if ((argv[i+1] != NULL) && !pw_source_defined) 114 { 115 pw_source_defined = 1; 116 infile = argv[++i]; 117 } 118 else 119 badopt = 1; 120 } 121 else if (strcmp(argv[i], "-stdin") == 0) 122 { 123 if (!pw_source_defined) 124 { 125 pw_source_defined = 1; 126 in_stdin = 1; 127 } 128 else 129 badopt = 1; 130 } 131 else if (strcmp(argv[i], "-quiet") == 0) 132 quiet = 1; 133 else if (strcmp(argv[i], "-table") == 0) 134 table = 1; 135 else if (strcmp(argv[i], "-reverse") == 0) 136 reverse = 1; 137 else if (argv[i][0] == '-') 138 badopt = 1; 139 else if (!pw_source_defined) 140 /* non-option arguments, use as passwords */ 141 { 142 pw_source_defined = 1; 143 passwds = &argv[i]; 144 opt_done = 1; 145 } 146 else 147 badopt = 1; 148 } 149 150 if (!usecrypt && !use1 && !useapr1) /* use default */ 151 usecrypt = 1; 152 if (usecrypt + use1 + useapr1 > 1) /* conflict */ 153 badopt = 1; 154 155 /* reject unsupported algorithms */ 156 #ifdef NO_DES 157 if (usecrypt) badopt = 1; 158 #endif 159 #ifdef NO_MD5CRYPT_1 160 if (use1 || useapr1) badopt = 1; 161 #endif 162 163 if (badopt) 164 { 165 BIO_printf(bio_err, "Usage: passwd [options] [passwords]\n"); 166 BIO_printf(bio_err, "where options are\n"); 167 #ifndef NO_DES 168 BIO_printf(bio_err, "-crypt standard Unix password algorithm (default)\n"); 169 #endif 170 #ifndef NO_MD5CRYPT_1 171 BIO_printf(bio_err, "-1 MD5-based password algorithm\n"); 172 BIO_printf(bio_err, "-apr1 MD5-based password algorithm, Apache variant\n"); 173 #endif 174 BIO_printf(bio_err, "-salt string use provided salt\n"); 175 BIO_printf(bio_err, "-in file read passwords from file\n"); 176 BIO_printf(bio_err, "-stdin read passwords from stdin\n"); 177 BIO_printf(bio_err, "-quiet no warnings\n"); 178 BIO_printf(bio_err, "-table format output as table\n"); 179 BIO_printf(bio_err, "-reverse switch table columns\n"); 180 181 goto err; 182 } 183 184 if ((infile != NULL) || in_stdin) 185 { 186 in = BIO_new(BIO_s_file()); 187 if (in == NULL) 188 goto err; 189 if (infile != NULL) 190 { 191 assert(in_stdin == 0); 192 if (BIO_read_filename(in, infile) <= 0) 193 goto err; 194 } 195 else 196 { 197 assert(in_stdin); 198 BIO_set_fp(in, stdin, BIO_NOCLOSE); 199 } 200 } 201 202 if (usecrypt) 203 pw_maxlen = 8; 204 else if (use1 || useapr1) 205 pw_maxlen = 256; /* arbitrary limit, should be enough for most passwords */ 206 207 if (passwds == NULL) 208 { 209 /* no passwords on the command line */ 210 211 passwd_malloc_size = pw_maxlen + 2; 212 /* longer than necessary so that we can warn about truncation */ 213 passwd = passwd_malloc = OPENSSL_malloc(passwd_malloc_size); 214 if (passwd_malloc == NULL) 215 goto err; 216 } 217 218 if ((in == NULL) && (passwds == NULL)) 219 { 220 /* build a null-terminated list */ 221 static char *passwds_static[2] = {NULL, NULL}; 222 223 passwds = passwds_static; 224 if (in == NULL) 225 if (EVP_read_pw_string(passwd_malloc, passwd_malloc_size, "Password: ", 0) != 0) 226 goto err; 227 passwds[0] = passwd_malloc; 228 } 229 230 if (in == NULL) 231 { 232 assert(passwds != NULL); 233 assert(*passwds != NULL); 234 235 do /* loop over list of passwords */ 236 { 237 passwd = *passwds++; 238 if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, out, 239 quiet, table, reverse, pw_maxlen, usecrypt, use1, useapr1)) 240 goto err; 241 } 242 while (*passwds != NULL); 243 } 244 else 245 /* in != NULL */ 246 { 247 int done; 248 249 assert (passwd != NULL); 250 do 251 { 252 int r = BIO_gets(in, passwd, pw_maxlen + 1); 253 if (r > 0) 254 { 255 char *c = (strchr(passwd, '\n')) ; 256 if (c != NULL) 257 *c = 0; /* truncate at newline */ 258 else 259 { 260 /* ignore rest of line */ 261 char trash[BUFSIZ]; 262 do 263 r = BIO_gets(in, trash, sizeof trash); 264 while ((r > 0) && (!strchr(trash, '\n'))); 265 } 266 267 if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, out, 268 quiet, table, reverse, pw_maxlen, usecrypt, use1, useapr1)) 269 goto err; 270 } 271 done = (r <= 0); 272 } 273 while (!done); 274 } 275 ret = 0; 276 277 err: 278 ERR_print_errors(bio_err); 279 if (salt_malloc) 280 OPENSSL_free(salt_malloc); 281 if (passwd_malloc) 282 OPENSSL_free(passwd_malloc); 283 if (in) 284 BIO_free(in); 285 if (out) 286 BIO_free_all(out); 287 EXIT(ret); 288 } 289 290 291 #ifndef NO_MD5CRYPT_1 292 /* MD5-based password algorithm (should probably be available as a library 293 * function; then the static buffer would not be acceptable). 294 * For magic string "1", this should be compatible to the MD5-based BSD 295 * password algorithm. 296 * For 'magic' string "apr1", this is compatible to the MD5-based Apache 297 * password algorithm. 298 * (Apparently, the Apache password algorithm is identical except that the 299 * 'magic' string was changed -- the laziest application of the NIH principle 300 * I've ever encountered.) 301 */ 302 static char *md5crypt(const char *passwd, const char *magic, const char *salt) 303 { 304 static char out_buf[6 + 9 + 24 + 2]; /* "$apr1$..salt..$.......md5hash..........\0" */ 305 unsigned char buf[MD5_DIGEST_LENGTH]; 306 char *salt_out; 307 int n, i; 308 MD5_CTX md; 309 size_t passwd_len, salt_len; 310 311 passwd_len = strlen(passwd); 312 out_buf[0] = '$'; 313 out_buf[1] = 0; 314 assert(strlen(magic) <= 4); /* "1" or "apr1" */ 315 strncat(out_buf, magic, 4); 316 strncat(out_buf, "$", 1); 317 strncat(out_buf, salt, 8); 318 assert(strlen(out_buf) <= 6 + 8); /* "$apr1$..salt.." */ 319 salt_out = out_buf + 2 + strlen(magic); 320 salt_len = strlen(salt_out); 321 assert(salt_len <= 8); 322 323 MD5_Init(&md); 324 MD5_Update(&md, passwd, passwd_len); 325 MD5_Update(&md, "$", 1); 326 MD5_Update(&md, magic, strlen(magic)); 327 MD5_Update(&md, "$", 1); 328 MD5_Update(&md, salt_out, salt_len); 329 330 { 331 MD5_CTX md2; 332 333 MD5_Init(&md2); 334 MD5_Update(&md2, passwd, passwd_len); 335 MD5_Update(&md2, salt_out, salt_len); 336 MD5_Update(&md2, passwd, passwd_len); 337 MD5_Final(buf, &md2); 338 } 339 for (i = passwd_len; i > sizeof buf; i -= sizeof buf) 340 MD5_Update(&md, buf, sizeof buf); 341 MD5_Update(&md, buf, i); 342 343 n = passwd_len; 344 while (n) 345 { 346 MD5_Update(&md, (n & 1) ? "\0" : passwd, 1); 347 n >>= 1; 348 } 349 MD5_Final(buf, &md); 350 351 for (i = 0; i < 1000; i++) 352 { 353 MD5_CTX md2; 354 355 MD5_Init(&md2); 356 MD5_Update(&md2, (i & 1) ? (unsigned char *) passwd : buf, 357 (i & 1) ? passwd_len : sizeof buf); 358 if (i % 3) 359 MD5_Update(&md2, salt_out, salt_len); 360 if (i % 7) 361 MD5_Update(&md2, passwd, passwd_len); 362 MD5_Update(&md2, (i & 1) ? buf : (unsigned char *) passwd, 363 (i & 1) ? sizeof buf : passwd_len); 364 MD5_Final(buf, &md2); 365 } 366 367 { 368 /* transform buf into output string */ 369 370 unsigned char buf_perm[sizeof buf]; 371 int dest, source; 372 char *output; 373 374 /* silly output permutation */ 375 for (dest = 0, source = 0; dest < 14; dest++, source = (source + 6) % 17) 376 buf_perm[dest] = buf[source]; 377 buf_perm[14] = buf[5]; 378 buf_perm[15] = buf[11]; 379 #ifndef PEDANTIC /* Unfortunately, this generates a "no effect" warning */ 380 assert(16 == sizeof buf_perm); 381 #endif 382 383 output = salt_out + salt_len; 384 assert(output == out_buf + strlen(out_buf)); 385 386 *output++ = '$'; 387 388 for (i = 0; i < 15; i += 3) 389 { 390 *output++ = cov_2char[buf_perm[i+2] & 0x3f]; 391 *output++ = cov_2char[((buf_perm[i+1] & 0xf) << 2) | 392 (buf_perm[i+2] >> 6)]; 393 *output++ = cov_2char[((buf_perm[i] & 3) << 4) | 394 (buf_perm[i+1] >> 4)]; 395 *output++ = cov_2char[buf_perm[i] >> 2]; 396 } 397 assert(i == 15); 398 *output++ = cov_2char[buf_perm[i] & 0x3f]; 399 *output++ = cov_2char[buf_perm[i] >> 6]; 400 *output = 0; 401 assert(strlen(out_buf) < sizeof(out_buf)); 402 } 403 404 return out_buf; 405 } 406 #endif 407 408 409 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p, 410 char *passwd, BIO *out, int quiet, int table, int reverse, 411 size_t pw_maxlen, int usecrypt, int use1, int useapr1) 412 { 413 char *hash = NULL; 414 415 assert(salt_p != NULL); 416 assert(salt_malloc_p != NULL); 417 418 /* first make sure we have a salt */ 419 if (!passed_salt) 420 { 421 #ifndef NO_DES 422 if (usecrypt) 423 { 424 if (*salt_malloc_p == NULL) 425 { 426 *salt_p = *salt_malloc_p = OPENSSL_malloc(3); 427 if (*salt_malloc_p == NULL) 428 goto err; 429 } 430 if (RAND_pseudo_bytes((unsigned char *)*salt_p, 2) < 0) 431 goto err; 432 (*salt_p)[0] = cov_2char[(*salt_p)[0] & 0x3f]; /* 6 bits */ 433 (*salt_p)[1] = cov_2char[(*salt_p)[1] & 0x3f]; /* 6 bits */ 434 (*salt_p)[2] = 0; 435 #ifdef CHARSET_EBCDIC 436 ascii2ebcdic(*salt_p, *salt_p, 2); /* des_crypt will convert 437 * back to ASCII */ 438 #endif 439 } 440 #endif /* !NO_DES */ 441 442 #ifndef NO_MD5CRYPT_1 443 if (use1 || useapr1) 444 { 445 int i; 446 447 if (*salt_malloc_p == NULL) 448 { 449 *salt_p = *salt_malloc_p = OPENSSL_malloc(9); 450 if (*salt_malloc_p == NULL) 451 goto err; 452 } 453 if (RAND_pseudo_bytes((unsigned char *)*salt_p, 8) < 0) 454 goto err; 455 456 for (i = 0; i < 8; i++) 457 (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */ 458 (*salt_p)[8] = 0; 459 } 460 #endif /* !NO_MD5CRYPT_1 */ 461 } 462 463 assert(*salt_p != NULL); 464 465 /* truncate password if necessary */ 466 if ((strlen(passwd) > pw_maxlen)) 467 { 468 if (!quiet) 469 BIO_printf(bio_err, "Warning: truncating password to %u characters\n", pw_maxlen); 470 passwd[pw_maxlen] = 0; 471 } 472 assert(strlen(passwd) <= pw_maxlen); 473 474 /* now compute password hash */ 475 #ifndef NO_DES 476 if (usecrypt) 477 hash = des_crypt(passwd, *salt_p); 478 #endif 479 #ifndef NO_MD5CRYPT_1 480 if (use1 || useapr1) 481 hash = md5crypt(passwd, (use1 ? "1" : "apr1"), *salt_p); 482 #endif 483 assert(hash != NULL); 484 485 if (table && !reverse) 486 BIO_printf(out, "%s\t%s\n", passwd, hash); 487 else if (table && reverse) 488 BIO_printf(out, "%s\t%s\n", hash, passwd); 489 else 490 BIO_printf(out, "%s\n", hash); 491 return 1; 492 493 err: 494 return 0; 495 } 496 #else 497 498 int MAIN(int argc, char **argv) 499 { 500 fputs("Program not available.\n", stderr) 501 EXIT(1); 502 } 503 #endif 504