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 } 275 276 err: 277 ERR_print_errors(bio_err); 278 if (salt_malloc) 279 OPENSSL_free(salt_malloc); 280 if (passwd_malloc) 281 OPENSSL_free(passwd_malloc); 282 if (in) 283 BIO_free(in); 284 if (out) 285 BIO_free_all(out); 286 EXIT(ret); 287 } 288 289 290 #ifndef NO_MD5CRYPT_1 291 /* MD5-based password algorithm (should probably be available as a library 292 * function; then the static buffer would not be acceptable). 293 * For magic string "1", this should be compatible to the MD5-based BSD 294 * password algorithm. 295 * For 'magic' string "apr1", this is compatible to the MD5-based Apache 296 * password algorithm. 297 * (Apparently, the Apache password algorithm is identical except that the 298 * 'magic' string was changed -- the laziest application of the NIH principle 299 * I've ever encountered.) 300 */ 301 static char *md5crypt(const char *passwd, const char *magic, const char *salt) 302 { 303 static char out_buf[6 + 9 + 24 + 2]; /* "$apr1$..salt..$.......md5hash..........\0" */ 304 unsigned char buf[MD5_DIGEST_LENGTH]; 305 char *salt_out; 306 int n, i; 307 MD5_CTX md; 308 size_t passwd_len, salt_len; 309 310 passwd_len = strlen(passwd); 311 out_buf[0] = '$'; 312 out_buf[1] = 0; 313 assert(strlen(magic) <= 4); /* "1" or "apr1" */ 314 strncat(out_buf, magic, 4); 315 strncat(out_buf, "$", 1); 316 strncat(out_buf, salt, 8); 317 assert(strlen(out_buf) <= 6 + 8); /* "$apr1$..salt.." */ 318 salt_out = out_buf + 6; 319 salt_len = strlen(salt_out); 320 assert(salt_len <= 8); 321 322 MD5_Init(&md); 323 MD5_Update(&md, passwd, passwd_len); 324 MD5_Update(&md, "$", 1); 325 MD5_Update(&md, magic, strlen(magic)); 326 MD5_Update(&md, "$", 1); 327 MD5_Update(&md, salt_out, salt_len); 328 329 { 330 MD5_CTX md2; 331 332 MD5_Init(&md2); 333 MD5_Update(&md2, passwd, passwd_len); 334 MD5_Update(&md2, salt_out, salt_len); 335 MD5_Update(&md2, passwd, passwd_len); 336 MD5_Final(buf, &md2); 337 } 338 for (i = passwd_len; i > sizeof buf; i -= sizeof buf) 339 MD5_Update(&md, buf, sizeof buf); 340 MD5_Update(&md, buf, i); 341 342 n = passwd_len; 343 while (n) 344 { 345 MD5_Update(&md, (n & 1) ? "\0" : passwd, 1); 346 n >>= 1; 347 } 348 MD5_Final(buf, &md); 349 350 for (i = 0; i < 1000; i++) 351 { 352 MD5_CTX md2; 353 354 MD5_Init(&md2); 355 MD5_Update(&md2, (i & 1) ? (unsigned char *) passwd : buf, 356 (i & 1) ? passwd_len : sizeof buf); 357 if (i % 3) 358 MD5_Update(&md2, salt_out, salt_len); 359 if (i % 7) 360 MD5_Update(&md2, passwd, passwd_len); 361 MD5_Update(&md2, (i & 1) ? buf : (unsigned char *) passwd, 362 (i & 1) ? sizeof buf : passwd_len); 363 MD5_Final(buf, &md2); 364 } 365 366 { 367 /* transform buf into output string */ 368 369 unsigned char buf_perm[sizeof buf]; 370 int dest, source; 371 char *output; 372 373 /* silly output permutation */ 374 for (dest = 0, source = 0; dest < 14; dest++, source = (source + 6) % 17) 375 buf_perm[dest] = buf[source]; 376 buf_perm[14] = buf[5]; 377 buf_perm[15] = buf[11]; 378 #ifndef PEDANTIC /* Unfortunately, this generates a "no effect" warning */ 379 assert(16 == sizeof buf_perm); 380 #endif 381 382 output = salt_out + salt_len; 383 assert(output == out_buf + strlen(out_buf)); 384 385 *output++ = '$'; 386 387 for (i = 0; i < 15; i += 3) 388 { 389 *output++ = cov_2char[buf_perm[i+2] & 0x3f]; 390 *output++ = cov_2char[((buf_perm[i+1] & 0xf) << 2) | 391 (buf_perm[i+2] >> 6)]; 392 *output++ = cov_2char[((buf_perm[i] & 3) << 4) | 393 (buf_perm[i+1] >> 4)]; 394 *output++ = cov_2char[buf_perm[i] >> 2]; 395 } 396 assert(i == 15); 397 *output++ = cov_2char[buf_perm[i] & 0x3f]; 398 *output++ = cov_2char[buf_perm[i] >> 6]; 399 *output = 0; 400 assert(strlen(out_buf) < sizeof(out_buf)); 401 } 402 403 return out_buf; 404 } 405 #endif 406 407 408 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p, 409 char *passwd, BIO *out, int quiet, int table, int reverse, 410 size_t pw_maxlen, int usecrypt, int use1, int useapr1) 411 { 412 char *hash = NULL; 413 414 assert(salt_p != NULL); 415 assert(salt_malloc_p != NULL); 416 417 /* first make sure we have a salt */ 418 if (!passed_salt) 419 { 420 #ifndef NO_DES 421 if (usecrypt) 422 { 423 if (*salt_malloc_p == NULL) 424 { 425 *salt_p = *salt_malloc_p = OPENSSL_malloc(3); 426 if (*salt_malloc_p == NULL) 427 goto err; 428 } 429 if (RAND_pseudo_bytes((unsigned char *)*salt_p, 2) < 0) 430 goto err; 431 (*salt_p)[0] = cov_2char[(*salt_p)[0] & 0x3f]; /* 6 bits */ 432 (*salt_p)[1] = cov_2char[(*salt_p)[1] & 0x3f]; /* 6 bits */ 433 (*salt_p)[2] = 0; 434 #ifdef CHARSET_EBCDIC 435 ascii2ebcdic(*salt_p, *salt_p, 2); /* des_crypt will convert 436 * back to ASCII */ 437 #endif 438 } 439 #endif /* !NO_DES */ 440 441 #ifndef NO_MD5CRYPT_1 442 if (use1 || useapr1) 443 { 444 int i; 445 446 if (*salt_malloc_p == NULL) 447 { 448 *salt_p = *salt_malloc_p = OPENSSL_malloc(9); 449 if (*salt_malloc_p == NULL) 450 goto err; 451 } 452 if (RAND_pseudo_bytes((unsigned char *)*salt_p, 8) < 0) 453 goto err; 454 455 for (i = 0; i < 8; i++) 456 (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */ 457 (*salt_p)[8] = 0; 458 } 459 #endif /* !NO_MD5CRYPT_1 */ 460 } 461 462 assert(*salt_p != NULL); 463 464 /* truncate password if necessary */ 465 if ((strlen(passwd) > pw_maxlen)) 466 { 467 if (!quiet) 468 BIO_printf(bio_err, "Warning: truncating password to %u characters\n", pw_maxlen); 469 passwd[pw_maxlen] = 0; 470 } 471 assert(strlen(passwd) <= pw_maxlen); 472 473 /* now compute password hash */ 474 #ifndef NO_DES 475 if (usecrypt) 476 hash = des_crypt(passwd, *salt_p); 477 #endif 478 #ifndef NO_MD5CRYPT_1 479 if (use1 || useapr1) 480 hash = md5crypt(passwd, (use1 ? "1" : "apr1"), *salt_p); 481 #endif 482 assert(hash != NULL); 483 484 if (table && !reverse) 485 BIO_printf(out, "%s\t%s\n", passwd, hash); 486 else if (table && reverse) 487 BIO_printf(out, "%s\t%s\n", hash, passwd); 488 else 489 BIO_printf(out, "%s\n", hash); 490 return 1; 491 492 err: 493 return 0; 494 } 495 #else 496 497 int MAIN(int argc, char **argv) 498 { 499 fputs("Program not available.\n", stderr) 500 EXIT(1); 501 } 502 #endif 503