1 /* apps/passwd.c */ 2 3 #if defined NO_MD5 || defined CHARSET_EBCDIC 4 # define NO_APR1 5 #endif 6 7 #if !defined(NO_DES) || !defined(NO_APR1) 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_APR1 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 useapr1); 46 47 /* -crypt - standard Unix password algorithm (default, only choice) 48 * -apr1 - MD5-based password algorithm 49 * -salt string - salt 50 * -in file - read passwords from file 51 * -stdin - read passwords from stdin 52 * -quiet - no warnings 53 * -table - format output as table 54 * -reverse - switch table columns 55 */ 56 57 int MAIN(int, char **); 58 59 int MAIN(int argc, char **argv) 60 { 61 int ret = 1; 62 char *infile = NULL; 63 int in_stdin = 0; 64 char *salt = NULL, *passwd = NULL, **passwds = NULL; 65 char *salt_malloc = NULL, *passwd_malloc = NULL; 66 int pw_source_defined = 0; 67 BIO *in = NULL, *out = NULL; 68 int i, badopt, opt_done; 69 int passed_salt = 0, quiet = 0, table = 0, reverse = 0; 70 int usecrypt = 0, useapr1 = 0; 71 size_t pw_maxlen = 0; 72 73 apps_startup(); 74 75 if (bio_err == NULL) 76 if ((bio_err=BIO_new(BIO_s_file())) != NULL) 77 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); 78 out = BIO_new(BIO_s_file()); 79 if (out == NULL) 80 goto err; 81 BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT); 82 83 badopt = 0, opt_done = 0; 84 i = 0; 85 while (!badopt && !opt_done && argv[++i] != NULL) 86 { 87 if (strcmp(argv[i], "-crypt") == 0) 88 usecrypt = 1; 89 else if (strcmp(argv[i], "-apr1") == 0) 90 useapr1 = 1; 91 else if (strcmp(argv[i], "-salt") == 0) 92 { 93 if ((argv[i+1] != NULL) && (salt == NULL)) 94 { 95 passed_salt = 1; 96 salt = argv[++i]; 97 } 98 else 99 badopt = 1; 100 } 101 else if (strcmp(argv[i], "-in") == 0) 102 { 103 if ((argv[i+1] != NULL) && !pw_source_defined) 104 { 105 pw_source_defined = 1; 106 infile = argv[++i]; 107 } 108 else 109 badopt = 1; 110 } 111 else if (strcmp(argv[i], "-stdin") == 0) 112 { 113 if (!pw_source_defined) 114 { 115 pw_source_defined = 1; 116 in_stdin = 1; 117 } 118 else 119 badopt = 1; 120 } 121 else if (strcmp(argv[i], "-quiet") == 0) 122 quiet = 1; 123 else if (strcmp(argv[i], "-table") == 0) 124 table = 1; 125 else if (strcmp(argv[i], "-reverse") == 0) 126 reverse = 1; 127 else if (argv[i][0] == '-') 128 badopt = 1; 129 else if (!pw_source_defined) 130 /* non-option arguments, use as passwords */ 131 { 132 pw_source_defined = 1; 133 passwds = &argv[i]; 134 opt_done = 1; 135 } 136 else 137 badopt = 1; 138 } 139 140 if (!usecrypt && !useapr1) /* use default */ 141 usecrypt = 1; 142 if (usecrypt + useapr1 > 1) /* conflict */ 143 badopt = 1; 144 145 /* reject unsupported algorithms */ 146 #ifdef NO_DES 147 if (usecrypt) badopt = 1; 148 #endif 149 #ifdef NO_APR1 150 if (useapr1) badopt = 1; 151 #endif 152 153 if (badopt) 154 { 155 BIO_printf(bio_err, "Usage: passwd [options] [passwords]\n"); 156 BIO_printf(bio_err, "where options are\n"); 157 #ifndef NO_DES 158 BIO_printf(bio_err, "-crypt standard Unix password algorithm (default)\n"); 159 #endif 160 #ifndef NO_APR1 161 BIO_printf(bio_err, "-apr1 MD5-based password algorithm\n"); 162 #endif 163 BIO_printf(bio_err, "-salt string use provided salt\n"); 164 BIO_printf(bio_err, "-in file read passwords from file\n"); 165 BIO_printf(bio_err, "-stdin read passwords from stdin\n"); 166 BIO_printf(bio_err, "-quiet no warnings\n"); 167 BIO_printf(bio_err, "-table format output as table\n"); 168 BIO_printf(bio_err, "-reverse switch table columns\n"); 169 170 goto err; 171 } 172 173 if ((infile != NULL) || in_stdin) 174 { 175 in = BIO_new(BIO_s_file()); 176 if (in == NULL) 177 goto err; 178 if (infile != NULL) 179 { 180 assert(in_stdin == 0); 181 if (BIO_read_filename(in, infile) <= 0) 182 goto err; 183 } 184 else 185 { 186 assert(in_stdin); 187 BIO_set_fp(in, stdin, BIO_NOCLOSE); 188 } 189 } 190 191 if (usecrypt) 192 pw_maxlen = 8; 193 else if (useapr1) 194 pw_maxlen = 256; /* arbitrary limit, should be enough for most passwords */ 195 196 if (passwds == NULL) 197 { 198 /* no passwords on the command line */ 199 passwd = passwd_malloc = Malloc(pw_maxlen + 1); 200 if (passwd_malloc == NULL) 201 goto err; 202 } 203 204 if ((in == NULL) && (passwds == NULL)) 205 { 206 /* build a null-terminated list */ 207 static char *passwds_static[2] = {NULL, NULL}; 208 209 passwds = passwds_static; 210 if (in == NULL) 211 if (EVP_read_pw_string(passwd_malloc, pw_maxlen + 1, "Password: ", 0) != 0) 212 goto err; 213 passwds[0] = passwd_malloc; 214 } 215 216 if (in == NULL) 217 { 218 assert(passwds != NULL); 219 assert(*passwds != NULL); 220 221 do /* loop over list of passwords */ 222 { 223 passwd = *passwds++; 224 if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, out, 225 quiet, table, reverse, pw_maxlen, usecrypt, useapr1)) 226 goto err; 227 } 228 while (*passwds != NULL); 229 } 230 else 231 /* in != NULL */ 232 { 233 int done; 234 235 assert (passwd != NULL); 236 do 237 { 238 int r = BIO_gets(in, passwd, pw_maxlen + 1); 239 if (r > 0) 240 { 241 char *c = (strchr(passwd, '\n')) ; 242 if (c != NULL) 243 *c = 0; /* truncate at newline */ 244 else 245 { 246 /* ignore rest of line */ 247 char trash[BUFSIZ]; 248 do 249 r = BIO_gets(in, trash, sizeof trash); 250 while ((r > 0) && (!strchr(trash, '\n'))); 251 } 252 253 if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, out, 254 quiet, table, reverse, pw_maxlen, usecrypt, useapr1)) 255 goto err; 256 } 257 done = (r <= 0); 258 } 259 while (!done); 260 } 261 262 err: 263 ERR_print_errors(bio_err); 264 if (salt_malloc) 265 Free(salt_malloc); 266 if (passwd_malloc) 267 Free(passwd_malloc); 268 if (in) 269 BIO_free(in); 270 if (out) 271 BIO_free(out); 272 EXIT(ret); 273 } 274 275 276 #ifndef NO_APR1 277 /* MD5-based password algorithm compatible to the one found in Apache 278 * (should probably be available as a library function; 279 * then the static buffer would not be acceptable) */ 280 static char *apr1_crypt(const char *passwd, const char *salt) 281 { 282 static char out_buf[6 + 9 + 24 + 2]; /* "$apr1$..salt..$.......md5hash..........\0" */ 283 unsigned char buf[MD5_DIGEST_LENGTH]; 284 char *salt_out; 285 int n, i; 286 MD5_CTX md; 287 size_t passwd_len, salt_len; 288 289 passwd_len = strlen(passwd); 290 strcpy(out_buf, "$apr1$"); 291 strncat(out_buf, salt, 8); 292 assert(strlen(out_buf) <= 6 + 8); /* "$apr1$..salt.." */ 293 salt_out = out_buf + 6; 294 salt_len = strlen(salt_out); 295 assert(salt_len <= 8); 296 297 MD5_Init(&md); 298 MD5_Update(&md, passwd, passwd_len); 299 MD5_Update(&md, "$apr1$", 6); 300 MD5_Update(&md, salt_out, salt_len); 301 302 { 303 MD5_CTX md2; 304 305 MD5_Init(&md2); 306 MD5_Update(&md2, passwd, passwd_len); 307 MD5_Update(&md2, salt_out, salt_len); 308 MD5_Update(&md2, passwd, passwd_len); 309 MD5_Final(buf, &md2); 310 } 311 for (i = passwd_len; i > sizeof buf; i -= sizeof buf) 312 MD5_Update(&md, buf, sizeof buf); 313 MD5_Update(&md, buf, i); 314 315 n = passwd_len; 316 while (n) 317 { 318 MD5_Update(&md, (n & 1) ? "\0" : passwd, 1); 319 n >>= 1; 320 } 321 MD5_Final(buf, &md); 322 323 for (i = 0; i < 1000; i++) 324 { 325 MD5_CTX md2; 326 327 MD5_Init(&md2); 328 MD5_Update(&md2, (i & 1) ? (unsigned char *) passwd : buf, 329 (i & 1) ? passwd_len : sizeof buf); 330 if (i % 3) 331 MD5_Update(&md2, salt_out, salt_len); 332 if (i % 7) 333 MD5_Update(&md2, passwd, passwd_len); 334 MD5_Update(&md2, (i & 1) ? buf : (unsigned char *) passwd, 335 (i & 1) ? sizeof buf : passwd_len); 336 MD5_Final(buf, &md2); 337 } 338 339 { 340 /* transform buf into output string */ 341 342 unsigned char buf_perm[sizeof buf]; 343 int dest, source; 344 char *output; 345 346 /* silly output permutation */ 347 for (dest = 0, source = 0; dest < 14; dest++, source = (source + 6) % 17) 348 buf_perm[dest] = buf[source]; 349 buf_perm[14] = buf[5]; 350 buf_perm[15] = buf[11]; 351 #ifndef PEDANTIC /* Unfortunately, this generates a "no effect" warning */ 352 assert(16 == sizeof buf_perm); 353 #endif 354 355 output = salt_out + salt_len; 356 assert(output == out_buf + strlen(out_buf)); 357 358 *output++ = '$'; 359 360 for (i = 0; i < 15; i += 3) 361 { 362 *output++ = cov_2char[buf_perm[i+2] & 0x3f]; 363 *output++ = cov_2char[((buf_perm[i+1] & 0xf) << 2) | 364 (buf_perm[i+2] >> 6)]; 365 *output++ = cov_2char[((buf_perm[i] & 3) << 4) | 366 (buf_perm[i+1] >> 4)]; 367 *output++ = cov_2char[buf_perm[i] >> 2]; 368 } 369 assert(i == 15); 370 *output++ = cov_2char[buf_perm[i] & 0x3f]; 371 *output++ = cov_2char[buf_perm[i] >> 6]; 372 *output = 0; 373 assert(strlen(out_buf) < sizeof(out_buf)); 374 } 375 376 return out_buf; 377 } 378 #endif 379 380 381 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p, 382 char *passwd, BIO *out, int quiet, int table, int reverse, 383 size_t pw_maxlen, int usecrypt, int useapr1) 384 { 385 char *hash = NULL; 386 387 assert(salt_p != NULL); 388 assert(salt_malloc_p != NULL); 389 390 /* first make sure we have a salt */ 391 if (!passed_salt) 392 { 393 #ifndef NO_DES 394 if (usecrypt) 395 { 396 if (*salt_malloc_p == NULL) 397 { 398 *salt_p = *salt_malloc_p = Malloc(3); 399 if (*salt_malloc_p == NULL) 400 goto err; 401 } 402 if (RAND_pseudo_bytes((unsigned char *)*salt_p, 2) < 0) 403 goto err; 404 (*salt_p)[0] = cov_2char[(*salt_p)[0] & 0x3f]; /* 6 bits */ 405 (*salt_p)[1] = cov_2char[(*salt_p)[1] & 0x3f]; /* 6 bits */ 406 (*salt_p)[2] = 0; 407 #ifdef CHARSET_EBCDIC 408 ascii2ebcdic(*salt_p, *salt_p, 2); /* des_crypt will convert 409 * back to ASCII */ 410 #endif 411 } 412 #endif /* !NO_DES */ 413 414 #ifndef NO_APR1 415 if (useapr1) 416 { 417 int i; 418 419 if (*salt_malloc_p == NULL) 420 { 421 *salt_p = *salt_malloc_p = Malloc(9); 422 if (*salt_malloc_p == NULL) 423 goto err; 424 } 425 if (RAND_pseudo_bytes((unsigned char *)*salt_p, 8) < 0) 426 goto err; 427 428 for (i = 0; i < 8; i++) 429 (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */ 430 (*salt_p)[8] = 0; 431 } 432 #endif /* !NO_APR1 */ 433 } 434 435 assert(*salt_p != NULL); 436 437 /* truncate password if necessary */ 438 if ((strlen(passwd) > pw_maxlen)) 439 { 440 if (!quiet) 441 BIO_printf(bio_err, "Warning: truncating password to %u characters\n", pw_maxlen); 442 passwd[pw_maxlen] = 0; 443 } 444 assert(strlen(passwd) <= pw_maxlen); 445 446 /* now compute password hash */ 447 #ifndef NO_DES 448 if (usecrypt) 449 hash = des_crypt(passwd, *salt_p); 450 #endif 451 #ifndef NO_APR1 452 if (useapr1) 453 hash = apr1_crypt(passwd, *salt_p); 454 #endif 455 assert(hash != NULL); 456 457 if (table && !reverse) 458 BIO_printf(out, "%s\t%s\n", passwd, hash); 459 else if (table && reverse) 460 BIO_printf(out, "%s\t%s\n", hash, passwd); 461 else 462 BIO_printf(out, "%s\n", hash); 463 return 1; 464 465 err: 466 return 0; 467 } 468 #else 469 470 int MAIN(int argc, char **argv) 471 { 472 fputs("Program not available.\n", stderr) 473 EXIT(1); 474 } 475 #endif 476