1 /* $OpenLDAP: pkg/ldap/libraries/liblutil/passwd.c,v 1.104.2.4 2008/02/11 23:26:42 kurt Exp $ */ 2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>. 3 * 4 * Copyright 1998-2008 The OpenLDAP Foundation. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted only as authorized by the OpenLDAP 9 * Public License. 10 * 11 * A copy of this license is available in the file LICENSE in the 12 * top-level directory of the distribution or, alternatively, at 13 * <http://www.OpenLDAP.org/license.html>. 14 */ 15 16 /* 17 * int lutil_passwd( 18 * const struct berval *passwd, 19 * const struct berval *cred, 20 * const char **schemes ) 21 * 22 * Returns true if user supplied credentials (cred) matches 23 * the stored password (passwd). 24 * 25 * Due to the use of the crypt(3) function 26 * this routine is NOT thread-safe. 27 */ 28 29 #include "portable.h" 30 31 #include <stdio.h> 32 #include <ac/stdlib.h> 33 #include <ac/string.h> 34 #include <ac/unistd.h> 35 36 #if defined(SLAPD_LMHASH) 37 # include <openssl/des.h> 38 #endif /* SLAPD_LMHASH */ 39 40 #include <ac/param.h> 41 42 #ifdef SLAPD_CRYPT 43 # include <ac/crypt.h> 44 45 # if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD ) 46 # ifdef HAVE_SHADOW_H 47 # include <shadow.h> 48 # endif 49 # ifdef HAVE_PWD_H 50 # include <pwd.h> 51 # endif 52 # ifdef HAVE_AIX_SECURITY 53 # include <userpw.h> 54 # endif 55 # endif 56 #endif 57 58 #include <lber.h> 59 60 #include "ldap_pvt.h" 61 #include "lber_pvt.h" 62 63 #include "lutil_md5.h" 64 #include "lutil_sha1.h" 65 #include "lutil.h" 66 67 static const unsigned char crypt64[] = 68 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890./"; 69 70 #ifdef SLAPD_CRYPT 71 static char *salt_format = NULL; 72 static lutil_cryptfunc lutil_crypt; 73 lutil_cryptfunc *lutil_cryptptr = lutil_crypt; 74 #endif 75 76 /* KLUDGE: 77 * chk_fn is NULL iff name is {CLEARTEXT} 78 * otherwise, things will break 79 */ 80 struct pw_scheme { 81 struct berval name; 82 LUTIL_PASSWD_CHK_FUNC *chk_fn; 83 LUTIL_PASSWD_HASH_FUNC *hash_fn; 84 }; 85 86 struct pw_slist { 87 struct pw_slist *next; 88 struct pw_scheme s; 89 }; 90 91 /* password check routines */ 92 93 #define SALT_SIZE 4 94 95 static LUTIL_PASSWD_CHK_FUNC chk_md5; 96 static LUTIL_PASSWD_CHK_FUNC chk_smd5; 97 static LUTIL_PASSWD_HASH_FUNC hash_smd5; 98 static LUTIL_PASSWD_HASH_FUNC hash_md5; 99 100 101 #ifdef LUTIL_SHA1_BYTES 102 static LUTIL_PASSWD_CHK_FUNC chk_ssha1; 103 static LUTIL_PASSWD_CHK_FUNC chk_sha1; 104 static LUTIL_PASSWD_HASH_FUNC hash_sha1; 105 static LUTIL_PASSWD_HASH_FUNC hash_ssha1; 106 #endif 107 108 #ifdef SLAPD_LMHASH 109 static LUTIL_PASSWD_CHK_FUNC chk_lanman; 110 static LUTIL_PASSWD_HASH_FUNC hash_lanman; 111 #endif 112 113 #ifdef SLAPD_CRYPT 114 static LUTIL_PASSWD_CHK_FUNC chk_crypt; 115 static LUTIL_PASSWD_HASH_FUNC hash_crypt; 116 117 #if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD ) 118 static LUTIL_PASSWD_CHK_FUNC chk_unix; 119 #endif 120 #endif 121 122 /* password hash routines */ 123 124 #ifdef SLAPD_CLEARTEXT 125 static LUTIL_PASSWD_HASH_FUNC hash_clear; 126 #endif 127 128 static struct pw_slist *pw_schemes; 129 static int pw_inited; 130 131 static const struct pw_scheme pw_schemes_default[] = 132 { 133 #ifdef LUTIL_SHA1_BYTES 134 { BER_BVC("{SSHA}"), chk_ssha1, hash_ssha1 }, 135 { BER_BVC("{SHA}"), chk_sha1, hash_sha1 }, 136 #endif 137 138 { BER_BVC("{SMD5}"), chk_smd5, hash_smd5 }, 139 { BER_BVC("{MD5}"), chk_md5, hash_md5 }, 140 141 #ifdef SLAPD_LMHASH 142 { BER_BVC("{LANMAN}"), chk_lanman, hash_lanman }, 143 #endif /* SLAPD_LMHASH */ 144 145 #ifdef SLAPD_CRYPT 146 { BER_BVC("{CRYPT}"), chk_crypt, hash_crypt }, 147 # if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD ) 148 { BER_BVC("{UNIX}"), chk_unix, NULL }, 149 # endif 150 #endif 151 152 #ifdef SLAPD_CLEARTEXT 153 /* pseudo scheme */ 154 { BER_BVC("{CLEARTEXT}"), NULL, hash_clear }, 155 #endif 156 157 { BER_BVNULL, NULL, NULL } 158 }; 159 160 int lutil_passwd_add( 161 struct berval *scheme, 162 LUTIL_PASSWD_CHK_FUNC *chk, 163 LUTIL_PASSWD_HASH_FUNC *hash ) 164 { 165 struct pw_slist *ptr; 166 167 if (!pw_inited) lutil_passwd_init(); 168 169 ptr = ber_memalloc( sizeof( struct pw_slist )); 170 if (!ptr) return -1; 171 ptr->next = pw_schemes; 172 ptr->s.name = *scheme; 173 ptr->s.chk_fn = chk; 174 ptr->s.hash_fn = hash; 175 pw_schemes = ptr; 176 return 0; 177 } 178 179 void lutil_passwd_init() 180 { 181 struct pw_scheme *s; 182 183 pw_inited = 1; 184 185 for( s=(struct pw_scheme *)pw_schemes_default; s->name.bv_val; s++) { 186 if ( lutil_passwd_add( &s->name, s->chk_fn, s->hash_fn ) ) break; 187 } 188 } 189 190 void lutil_passwd_destroy() 191 { 192 struct pw_slist *ptr, *next; 193 194 for( ptr=pw_schemes; ptr; ptr=next ) { 195 next = ptr->next; 196 ber_memfree( ptr ); 197 } 198 } 199 200 static const struct pw_scheme *get_scheme( 201 const char* scheme ) 202 { 203 struct pw_slist *pws; 204 struct berval bv; 205 206 if (!pw_inited) lutil_passwd_init(); 207 208 bv.bv_val = strchr( scheme, '}' ); 209 if ( !bv.bv_val ) 210 return NULL; 211 212 bv.bv_len = bv.bv_val - scheme + 1; 213 bv.bv_val = (char *) scheme; 214 215 for( pws=pw_schemes; pws; pws=pws->next ) { 216 if ( ber_bvstrcasecmp(&bv, &pws->s.name ) == 0 ) { 217 return &(pws->s); 218 } 219 } 220 221 return NULL; 222 } 223 224 int lutil_passwd_scheme( 225 const char* scheme ) 226 { 227 if( scheme == NULL ) { 228 return 0; 229 } 230 231 return get_scheme(scheme) != NULL; 232 } 233 234 235 static int is_allowed_scheme( 236 const char* scheme, 237 const char** schemes ) 238 { 239 int i; 240 241 if( schemes == NULL ) return 1; 242 243 for( i=0; schemes[i] != NULL; i++ ) { 244 if( strcasecmp( scheme, schemes[i] ) == 0 ) { 245 return 1; 246 } 247 } 248 return 0; 249 } 250 251 static struct berval *passwd_scheme( 252 const struct pw_scheme *scheme, 253 const struct berval * passwd, 254 struct berval *bv, 255 const char** allowed ) 256 { 257 if( !is_allowed_scheme( scheme->name.bv_val, allowed ) ) { 258 return NULL; 259 } 260 261 if( passwd->bv_len >= scheme->name.bv_len ) { 262 if( strncasecmp( passwd->bv_val, scheme->name.bv_val, scheme->name.bv_len ) == 0 ) { 263 bv->bv_val = &passwd->bv_val[scheme->name.bv_len]; 264 bv->bv_len = passwd->bv_len - scheme->name.bv_len; 265 266 return bv; 267 } 268 } 269 270 return NULL; 271 } 272 273 /* 274 * Return 0 if creds are good. 275 */ 276 int 277 lutil_passwd( 278 const struct berval *passwd, /* stored passwd */ 279 const struct berval *cred, /* user cred */ 280 const char **schemes, 281 const char **text ) 282 { 283 struct pw_slist *pws; 284 285 if ( text ) *text = NULL; 286 287 if (cred == NULL || cred->bv_len == 0 || 288 passwd == NULL || passwd->bv_len == 0 ) 289 { 290 return -1; 291 } 292 293 if (!pw_inited) lutil_passwd_init(); 294 295 for( pws=pw_schemes; pws; pws=pws->next ) { 296 if( pws->s.chk_fn ) { 297 struct berval x; 298 struct berval *p = passwd_scheme( &(pws->s), 299 passwd, &x, schemes ); 300 301 if( p != NULL ) { 302 return (pws->s.chk_fn)( &(pws->s.name), p, cred, text ); 303 } 304 } 305 } 306 307 #ifdef SLAPD_CLEARTEXT 308 /* Do we think there is a scheme specifier here that we 309 * didn't recognize? Assume a scheme name is at least 1 character. 310 */ 311 if (( passwd->bv_val[0] == '{' ) && 312 ( ber_bvchr( passwd, '}' ) > passwd->bv_val+1 )) 313 { 314 return 1; 315 } 316 if( is_allowed_scheme("{CLEARTEXT}", schemes ) ) { 317 return ( passwd->bv_len == cred->bv_len ) ? 318 memcmp( passwd->bv_val, cred->bv_val, passwd->bv_len ) 319 : 1; 320 } 321 #endif 322 return 1; 323 } 324 325 int lutil_passwd_generate( struct berval *pw, ber_len_t len ) 326 { 327 328 if( len < 1 ) return -1; 329 330 pw->bv_len = len; 331 pw->bv_val = ber_memalloc( len + 1 ); 332 333 if( pw->bv_val == NULL ) { 334 return -1; 335 } 336 337 if( lutil_entropy( (unsigned char *) pw->bv_val, pw->bv_len) < 0 ) { 338 return -1; 339 } 340 341 for( len = 0; len < pw->bv_len; len++ ) { 342 pw->bv_val[len] = crypt64[ 343 pw->bv_val[len] % (sizeof(crypt64)-1) ]; 344 } 345 346 pw->bv_val[len] = '\0'; 347 348 return 0; 349 } 350 351 int lutil_passwd_hash( 352 const struct berval * passwd, 353 const char * method, 354 struct berval *hash, 355 const char **text ) 356 { 357 const struct pw_scheme *sc = get_scheme( method ); 358 359 hash->bv_val = NULL; 360 hash->bv_len = 0; 361 362 if( sc == NULL ) { 363 if( text ) *text = "scheme not recognized"; 364 return -1; 365 } 366 367 if( ! sc->hash_fn ) { 368 if( text ) *text = "scheme provided no hash function"; 369 return -1; 370 } 371 372 if( text ) *text = NULL; 373 374 return (sc->hash_fn)( &sc->name, passwd, hash, text ); 375 } 376 377 /* pw_string is only called when SLAPD_LMHASH or SLAPD_CRYPT is defined */ 378 #if defined(SLAPD_LMHASH) || defined(SLAPD_CRYPT) 379 static int pw_string( 380 const struct berval *sc, 381 struct berval *passwd ) 382 { 383 struct berval pw; 384 385 pw.bv_len = sc->bv_len + passwd->bv_len; 386 pw.bv_val = ber_memalloc( pw.bv_len + 1 ); 387 388 if( pw.bv_val == NULL ) { 389 return LUTIL_PASSWD_ERR; 390 } 391 392 AC_MEMCPY( pw.bv_val, sc->bv_val, sc->bv_len ); 393 AC_MEMCPY( &pw.bv_val[sc->bv_len], passwd->bv_val, passwd->bv_len ); 394 395 pw.bv_val[pw.bv_len] = '\0'; 396 *passwd = pw; 397 398 return LUTIL_PASSWD_OK; 399 } 400 #endif /* SLAPD_LMHASH || SLAPD_CRYPT */ 401 402 static int pw_string64( 403 const struct berval *sc, 404 const struct berval *hash, 405 struct berval *b64, 406 const struct berval *salt ) 407 { 408 int rc; 409 struct berval string; 410 size_t b64len; 411 412 if( salt ) { 413 /* need to base64 combined string */ 414 string.bv_len = hash->bv_len + salt->bv_len; 415 string.bv_val = ber_memalloc( string.bv_len + 1 ); 416 417 if( string.bv_val == NULL ) { 418 return LUTIL_PASSWD_ERR; 419 } 420 421 AC_MEMCPY( string.bv_val, hash->bv_val, 422 hash->bv_len ); 423 AC_MEMCPY( &string.bv_val[hash->bv_len], salt->bv_val, 424 salt->bv_len ); 425 string.bv_val[string.bv_len] = '\0'; 426 427 } else { 428 string = *hash; 429 } 430 431 b64len = LUTIL_BASE64_ENCODE_LEN( string.bv_len ) + 1; 432 b64->bv_len = b64len + sc->bv_len; 433 b64->bv_val = ber_memalloc( b64->bv_len + 1 ); 434 435 if( b64->bv_val == NULL ) { 436 if( salt ) ber_memfree( string.bv_val ); 437 return LUTIL_PASSWD_ERR; 438 } 439 440 AC_MEMCPY(b64->bv_val, sc->bv_val, sc->bv_len); 441 442 rc = lutil_b64_ntop( 443 (unsigned char *) string.bv_val, string.bv_len, 444 &b64->bv_val[sc->bv_len], b64len ); 445 446 if( salt ) ber_memfree( string.bv_val ); 447 448 if( rc < 0 ) { 449 return LUTIL_PASSWD_ERR; 450 } 451 452 /* recompute length */ 453 b64->bv_len = sc->bv_len + rc; 454 assert( strlen(b64->bv_val) == b64->bv_len ); 455 return LUTIL_PASSWD_OK; 456 } 457 458 /* PASSWORD CHECK ROUTINES */ 459 460 #ifdef LUTIL_SHA1_BYTES 461 static int chk_ssha1( 462 const struct berval *sc, 463 const struct berval * passwd, 464 const struct berval * cred, 465 const char **text ) 466 { 467 lutil_SHA1_CTX SHA1context; 468 unsigned char SHA1digest[LUTIL_SHA1_BYTES]; 469 int rc; 470 unsigned char *orig_pass = NULL; 471 472 /* safety check -- must have some salt */ 473 if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <= sizeof(SHA1digest)) { 474 return LUTIL_PASSWD_ERR; 475 } 476 477 /* decode base64 password */ 478 orig_pass = (unsigned char *) ber_memalloc( (size_t) ( 479 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) ); 480 481 if( orig_pass == NULL ) return LUTIL_PASSWD_ERR; 482 483 rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len); 484 485 /* safety check -- must have some salt */ 486 if (rc <= (int)(sizeof(SHA1digest))) { 487 ber_memfree(orig_pass); 488 return LUTIL_PASSWD_ERR; 489 } 490 491 /* hash credentials with salt */ 492 lutil_SHA1Init(&SHA1context); 493 lutil_SHA1Update(&SHA1context, 494 (const unsigned char *) cred->bv_val, cred->bv_len); 495 lutil_SHA1Update(&SHA1context, 496 (const unsigned char *) &orig_pass[sizeof(SHA1digest)], 497 rc - sizeof(SHA1digest)); 498 lutil_SHA1Final(SHA1digest, &SHA1context); 499 500 /* compare */ 501 rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest)); 502 ber_memfree(orig_pass); 503 return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK; 504 } 505 506 static int chk_sha1( 507 const struct berval *sc, 508 const struct berval * passwd, 509 const struct berval * cred, 510 const char **text ) 511 { 512 lutil_SHA1_CTX SHA1context; 513 unsigned char SHA1digest[LUTIL_SHA1_BYTES]; 514 int rc; 515 unsigned char *orig_pass = NULL; 516 517 /* safety check */ 518 if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) < sizeof(SHA1digest)) { 519 return LUTIL_PASSWD_ERR; 520 } 521 522 /* base64 un-encode password */ 523 orig_pass = (unsigned char *) ber_memalloc( (size_t) ( 524 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) ); 525 526 if( orig_pass == NULL ) return LUTIL_PASSWD_ERR; 527 528 rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len); 529 530 if( rc != sizeof(SHA1digest) ) { 531 ber_memfree(orig_pass); 532 return LUTIL_PASSWD_ERR; 533 } 534 535 /* hash credentials with salt */ 536 lutil_SHA1Init(&SHA1context); 537 lutil_SHA1Update(&SHA1context, 538 (const unsigned char *) cred->bv_val, cred->bv_len); 539 lutil_SHA1Final(SHA1digest, &SHA1context); 540 541 /* compare */ 542 rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest)); 543 ber_memfree(orig_pass); 544 return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK; 545 } 546 #endif 547 548 static int chk_smd5( 549 const struct berval *sc, 550 const struct berval * passwd, 551 const struct berval * cred, 552 const char **text ) 553 { 554 lutil_MD5_CTX MD5context; 555 unsigned char MD5digest[LUTIL_MD5_BYTES]; 556 int rc; 557 unsigned char *orig_pass = NULL; 558 559 /* safety check */ 560 if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <= sizeof(MD5digest)) { 561 return LUTIL_PASSWD_ERR; 562 } 563 564 /* base64 un-encode password */ 565 orig_pass = (unsigned char *) ber_memalloc( (size_t) ( 566 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) ); 567 568 if( orig_pass == NULL ) return LUTIL_PASSWD_ERR; 569 570 rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len); 571 572 if (rc <= (int)(sizeof(MD5digest))) { 573 ber_memfree(orig_pass); 574 return LUTIL_PASSWD_ERR; 575 } 576 577 /* hash credentials with salt */ 578 lutil_MD5Init(&MD5context); 579 lutil_MD5Update(&MD5context, 580 (const unsigned char *) cred->bv_val, 581 cred->bv_len ); 582 lutil_MD5Update(&MD5context, 583 &orig_pass[sizeof(MD5digest)], 584 rc - sizeof(MD5digest)); 585 lutil_MD5Final(MD5digest, &MD5context); 586 587 /* compare */ 588 rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest)); 589 ber_memfree(orig_pass); 590 return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK; 591 } 592 593 static int chk_md5( 594 const struct berval *sc, 595 const struct berval * passwd, 596 const struct berval * cred, 597 const char **text ) 598 { 599 lutil_MD5_CTX MD5context; 600 unsigned char MD5digest[LUTIL_MD5_BYTES]; 601 int rc; 602 unsigned char *orig_pass = NULL; 603 604 /* safety check */ 605 if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) < sizeof(MD5digest)) { 606 return LUTIL_PASSWD_ERR; 607 } 608 609 /* base64 un-encode password */ 610 orig_pass = (unsigned char *) ber_memalloc( (size_t) ( 611 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) ); 612 613 if( orig_pass == NULL ) return LUTIL_PASSWD_ERR; 614 615 rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len); 616 if ( rc != sizeof(MD5digest) ) { 617 ber_memfree(orig_pass); 618 return LUTIL_PASSWD_ERR; 619 } 620 621 /* hash credentials with salt */ 622 lutil_MD5Init(&MD5context); 623 lutil_MD5Update(&MD5context, 624 (const unsigned char *) cred->bv_val, 625 cred->bv_len ); 626 lutil_MD5Final(MD5digest, &MD5context); 627 628 /* compare */ 629 rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest)); 630 ber_memfree(orig_pass); 631 return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK; 632 } 633 634 #ifdef SLAPD_LMHASH 635 /* pseudocode from RFC2433 636 * A.2 LmPasswordHash() 637 * 638 * LmPasswordHash( 639 * IN 0-to-14-oem-char Password, 640 * OUT 16-octet PasswordHash ) 641 * { 642 * Set UcasePassword to the uppercased Password 643 * Zero pad UcasePassword to 14 characters 644 * 645 * DesHash( 1st 7-octets of UcasePassword, 646 * giving 1st 8-octets of PasswordHash ) 647 * 648 * DesHash( 2nd 7-octets of UcasePassword, 649 * giving 2nd 8-octets of PasswordHash ) 650 * } 651 * 652 * 653 * A.3 DesHash() 654 * 655 * DesHash( 656 * IN 7-octet Clear, 657 * OUT 8-octet Cypher ) 658 * { 659 * * 660 * * Make Cypher an irreversibly encrypted form of Clear by 661 * * encrypting known text using Clear as the secret key. 662 * * The known text consists of the string 663 * * 664 * * KGS!@#$% 665 * * 666 * 667 * Set StdText to "KGS!@#$%" 668 * DesEncrypt( StdText, Clear, giving Cypher ) 669 * } 670 * 671 * 672 * A.4 DesEncrypt() 673 * 674 * DesEncrypt( 675 * IN 8-octet Clear, 676 * IN 7-octet Key, 677 * OUT 8-octet Cypher ) 678 * { 679 * * 680 * * Use the DES encryption algorithm [4] in ECB mode [9] 681 * * to encrypt Clear into Cypher such that Cypher can 682 * * only be decrypted back to Clear by providing Key. 683 * * Note that the DES algorithm takes as input a 64-bit 684 * * stream where the 8th, 16th, 24th, etc. bits are 685 * * parity bits ignored by the encrypting algorithm. 686 * * Unless you write your own DES to accept 56-bit input 687 * * without parity, you will need to insert the parity bits 688 * * yourself. 689 * * 690 * } 691 */ 692 693 static void lmPasswd_to_key( 694 const char *lmPasswd, 695 des_cblock *key) 696 { 697 const unsigned char *lpw = (const unsigned char *) lmPasswd; 698 unsigned char *k = (unsigned char *) key; 699 700 /* make room for parity bits */ 701 k[0] = lpw[0]; 702 k[1] = ((lpw[0] & 0x01) << 7) | (lpw[1] >> 1); 703 k[2] = ((lpw[1] & 0x03) << 6) | (lpw[2] >> 2); 704 k[3] = ((lpw[2] & 0x07) << 5) | (lpw[3] >> 3); 705 k[4] = ((lpw[3] & 0x0F) << 4) | (lpw[4] >> 4); 706 k[5] = ((lpw[4] & 0x1F) << 3) | (lpw[5] >> 5); 707 k[6] = ((lpw[5] & 0x3F) << 2) | (lpw[6] >> 6); 708 k[7] = ((lpw[6] & 0x7F) << 1); 709 710 des_set_odd_parity( key ); 711 } 712 713 static int chk_lanman( 714 const struct berval *scheme, 715 const struct berval *passwd, 716 const struct berval *cred, 717 const char **text ) 718 { 719 int i; 720 char UcasePassword[15]; 721 des_cblock key; 722 des_key_schedule schedule; 723 des_cblock StdText = "KGS!@#$%"; 724 des_cblock PasswordHash1, PasswordHash2; 725 char PasswordHash[33], storedPasswordHash[33]; 726 727 for( i=0; i<cred->bv_len; i++) { 728 if(cred->bv_val[i] == '\0') { 729 return LUTIL_PASSWD_ERR; /* NUL character in password */ 730 } 731 } 732 733 if( cred->bv_val[i] != '\0' ) { 734 return LUTIL_PASSWD_ERR; /* passwd must behave like a string */ 735 } 736 737 strncpy( UcasePassword, cred->bv_val, 14 ); 738 UcasePassword[14] = '\0'; 739 ldap_pvt_str2upper( UcasePassword ); 740 741 lmPasswd_to_key( UcasePassword, &key ); 742 des_set_key_unchecked( &key, schedule ); 743 des_ecb_encrypt( &StdText, &PasswordHash1, schedule , DES_ENCRYPT ); 744 745 lmPasswd_to_key( &UcasePassword[7], &key ); 746 des_set_key_unchecked( &key, schedule ); 747 des_ecb_encrypt( &StdText, &PasswordHash2, schedule , DES_ENCRYPT ); 748 749 sprintf( PasswordHash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x", 750 PasswordHash1[0],PasswordHash1[1],PasswordHash1[2],PasswordHash1[3], 751 PasswordHash1[4],PasswordHash1[5],PasswordHash1[6],PasswordHash1[7], 752 PasswordHash2[0],PasswordHash2[1],PasswordHash2[2],PasswordHash2[3], 753 PasswordHash2[4],PasswordHash2[5],PasswordHash2[6],PasswordHash2[7] ); 754 755 /* as a precaution convert stored password hash to lower case */ 756 strncpy( storedPasswordHash, passwd->bv_val, 32 ); 757 storedPasswordHash[32] = '\0'; 758 ldap_pvt_str2lower( storedPasswordHash ); 759 760 return memcmp( PasswordHash, storedPasswordHash, 32) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK; 761 } 762 #endif /* SLAPD_LMHASH */ 763 764 #ifdef SLAPD_CRYPT 765 static int lutil_crypt( 766 const char *key, 767 const char *salt, 768 char **hash ) 769 { 770 char *cr = crypt( key, salt ); 771 int rc; 772 773 if( cr == NULL || cr[0] == '\0' ) { 774 /* salt must have been invalid */ 775 rc = LUTIL_PASSWD_ERR; 776 } else { 777 if ( hash ) { 778 *hash = ber_strdup( cr ); 779 rc = LUTIL_PASSWD_OK; 780 } else { 781 rc = strcmp( salt, cr ) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK; 782 } 783 } 784 return rc; 785 } 786 787 static int chk_crypt( 788 const struct berval *sc, 789 const struct berval * passwd, 790 const struct berval * cred, 791 const char **text ) 792 { 793 unsigned int i; 794 795 for( i=0; i<cred->bv_len; i++) { 796 if(cred->bv_val[i] == '\0') { 797 return LUTIL_PASSWD_ERR; /* NUL character in password */ 798 } 799 } 800 801 if( cred->bv_val[i] != '\0' ) { 802 return LUTIL_PASSWD_ERR; /* cred must behave like a string */ 803 } 804 805 if( passwd->bv_len < 2 ) { 806 return LUTIL_PASSWD_ERR; /* passwd must be at least two characters long */ 807 } 808 809 for( i=0; i<passwd->bv_len; i++) { 810 if(passwd->bv_val[i] == '\0') { 811 return LUTIL_PASSWD_ERR; /* NUL character in password */ 812 } 813 } 814 815 if( passwd->bv_val[i] != '\0' ) { 816 return LUTIL_PASSWD_ERR; /* passwd must behave like a string */ 817 } 818 819 return lutil_cryptptr( cred->bv_val, passwd->bv_val, NULL ); 820 } 821 822 # if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD ) 823 static int chk_unix( 824 const struct berval *sc, 825 const struct berval * passwd, 826 const struct berval * cred, 827 const char **text ) 828 { 829 unsigned int i; 830 char *pw; 831 832 for( i=0; i<cred->bv_len; i++) { 833 if(cred->bv_val[i] == '\0') { 834 return LUTIL_PASSWD_ERR; /* NUL character in password */ 835 } 836 } 837 if( cred->bv_val[i] != '\0' ) { 838 return LUTIL_PASSWD_ERR; /* cred must behave like a string */ 839 } 840 841 for( i=0; i<passwd->bv_len; i++) { 842 if(passwd->bv_val[i] == '\0') { 843 return LUTIL_PASSWD_ERR; /* NUL character in password */ 844 } 845 } 846 847 if( passwd->bv_val[i] != '\0' ) { 848 return LUTIL_PASSWD_ERR; /* passwd must behave like a string */ 849 } 850 851 { 852 struct passwd *pwd = getpwnam(passwd->bv_val); 853 854 if(pwd == NULL) { 855 return LUTIL_PASSWD_ERR; /* not found */ 856 } 857 858 pw = pwd->pw_passwd; 859 } 860 # ifdef HAVE_GETSPNAM 861 { 862 struct spwd *spwd = getspnam(passwd->bv_val); 863 864 if(spwd != NULL) { 865 pw = spwd->sp_pwdp; 866 } 867 } 868 # endif 869 # ifdef HAVE_AIX_SECURITY 870 { 871 struct userpw *upw = getuserpw(passwd->bv_val); 872 873 if (upw != NULL) { 874 pw = upw->upw_passwd; 875 } 876 } 877 # endif 878 879 if( pw == NULL || pw[0] == '\0' || pw[1] == '\0' ) { 880 /* password must must be at least two characters long */ 881 return LUTIL_PASSWD_ERR; 882 } 883 884 return lutil_cryptptr( cred->bv_val, pw, NULL ); 885 } 886 # endif 887 #endif 888 889 /* PASSWORD GENERATION ROUTINES */ 890 891 #ifdef LUTIL_SHA1_BYTES 892 static int hash_ssha1( 893 const struct berval *scheme, 894 const struct berval *passwd, 895 struct berval *hash, 896 const char **text ) 897 { 898 lutil_SHA1_CTX SHA1context; 899 unsigned char SHA1digest[LUTIL_SHA1_BYTES]; 900 char saltdata[SALT_SIZE]; 901 struct berval digest; 902 struct berval salt; 903 904 digest.bv_val = (char *) SHA1digest; 905 digest.bv_len = sizeof(SHA1digest); 906 salt.bv_val = saltdata; 907 salt.bv_len = sizeof(saltdata); 908 909 if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) { 910 return LUTIL_PASSWD_ERR; 911 } 912 913 lutil_SHA1Init( &SHA1context ); 914 lutil_SHA1Update( &SHA1context, 915 (const unsigned char *)passwd->bv_val, passwd->bv_len ); 916 lutil_SHA1Update( &SHA1context, 917 (const unsigned char *)salt.bv_val, salt.bv_len ); 918 lutil_SHA1Final( SHA1digest, &SHA1context ); 919 920 return pw_string64( scheme, &digest, hash, &salt); 921 } 922 923 static int hash_sha1( 924 const struct berval *scheme, 925 const struct berval *passwd, 926 struct berval *hash, 927 const char **text ) 928 { 929 lutil_SHA1_CTX SHA1context; 930 unsigned char SHA1digest[LUTIL_SHA1_BYTES]; 931 struct berval digest; 932 digest.bv_val = (char *) SHA1digest; 933 digest.bv_len = sizeof(SHA1digest); 934 935 lutil_SHA1Init( &SHA1context ); 936 lutil_SHA1Update( &SHA1context, 937 (const unsigned char *)passwd->bv_val, passwd->bv_len ); 938 lutil_SHA1Final( SHA1digest, &SHA1context ); 939 940 return pw_string64( scheme, &digest, hash, NULL); 941 } 942 #endif 943 944 static int hash_smd5( 945 const struct berval *scheme, 946 const struct berval *passwd, 947 struct berval *hash, 948 const char **text ) 949 { 950 lutil_MD5_CTX MD5context; 951 unsigned char MD5digest[LUTIL_MD5_BYTES]; 952 char saltdata[SALT_SIZE]; 953 struct berval digest; 954 struct berval salt; 955 956 digest.bv_val = (char *) MD5digest; 957 digest.bv_len = sizeof(MD5digest); 958 salt.bv_val = saltdata; 959 salt.bv_len = sizeof(saltdata); 960 961 if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) { 962 return LUTIL_PASSWD_ERR; 963 } 964 965 lutil_MD5Init( &MD5context ); 966 lutil_MD5Update( &MD5context, 967 (const unsigned char *) passwd->bv_val, passwd->bv_len ); 968 lutil_MD5Update( &MD5context, 969 (const unsigned char *) salt.bv_val, salt.bv_len ); 970 lutil_MD5Final( MD5digest, &MD5context ); 971 972 return pw_string64( scheme, &digest, hash, &salt ); 973 } 974 975 static int hash_md5( 976 const struct berval *scheme, 977 const struct berval *passwd, 978 struct berval *hash, 979 const char **text ) 980 { 981 lutil_MD5_CTX MD5context; 982 unsigned char MD5digest[LUTIL_MD5_BYTES]; 983 984 struct berval digest; 985 986 digest.bv_val = (char *) MD5digest; 987 digest.bv_len = sizeof(MD5digest); 988 989 lutil_MD5Init( &MD5context ); 990 lutil_MD5Update( &MD5context, 991 (const unsigned char *) passwd->bv_val, passwd->bv_len ); 992 lutil_MD5Final( MD5digest, &MD5context ); 993 994 return pw_string64( scheme, &digest, hash, NULL ); 995 ; 996 } 997 998 #ifdef SLAPD_LMHASH 999 static int hash_lanman( 1000 const struct berval *scheme, 1001 const struct berval *passwd, 1002 struct berval *hash, 1003 const char **text ) 1004 { 1005 1006 int i; 1007 char UcasePassword[15]; 1008 des_cblock key; 1009 des_key_schedule schedule; 1010 des_cblock StdText = "KGS!@#$%"; 1011 des_cblock PasswordHash1, PasswordHash2; 1012 char PasswordHash[33]; 1013 1014 for( i=0; i<passwd->bv_len; i++) { 1015 if(passwd->bv_val[i] == '\0') { 1016 return LUTIL_PASSWD_ERR; /* NUL character in password */ 1017 } 1018 } 1019 1020 if( passwd->bv_val[i] != '\0' ) { 1021 return LUTIL_PASSWD_ERR; /* passwd must behave like a string */ 1022 } 1023 1024 strncpy( UcasePassword, passwd->bv_val, 14 ); 1025 UcasePassword[14] = '\0'; 1026 ldap_pvt_str2upper( UcasePassword ); 1027 1028 lmPasswd_to_key( UcasePassword, &key ); 1029 des_set_key_unchecked( &key, schedule ); 1030 des_ecb_encrypt( &StdText, &PasswordHash1, schedule , DES_ENCRYPT ); 1031 1032 lmPasswd_to_key( &UcasePassword[7], &key ); 1033 des_set_key_unchecked( &key, schedule ); 1034 des_ecb_encrypt( &StdText, &PasswordHash2, schedule , DES_ENCRYPT ); 1035 1036 sprintf( PasswordHash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x", 1037 PasswordHash1[0],PasswordHash1[1],PasswordHash1[2],PasswordHash1[3], 1038 PasswordHash1[4],PasswordHash1[5],PasswordHash1[6],PasswordHash1[7], 1039 PasswordHash2[0],PasswordHash2[1],PasswordHash2[2],PasswordHash2[3], 1040 PasswordHash2[4],PasswordHash2[5],PasswordHash2[6],PasswordHash2[7] ); 1041 1042 hash->bv_val = PasswordHash; 1043 hash->bv_len = 32; 1044 1045 return pw_string( scheme, hash ); 1046 } 1047 #endif /* SLAPD_LMHASH */ 1048 1049 #ifdef SLAPD_CRYPT 1050 static int hash_crypt( 1051 const struct berval *scheme, 1052 const struct berval *passwd, 1053 struct berval *hash, 1054 const char **text ) 1055 { 1056 unsigned char salt[32]; /* salt suitable for most anything */ 1057 unsigned int i; 1058 char *save; 1059 int rc; 1060 1061 for( i=0; i<passwd->bv_len; i++) { 1062 if(passwd->bv_val[i] == '\0') { 1063 return LUTIL_PASSWD_ERR; /* NUL character in password */ 1064 } 1065 } 1066 1067 if( passwd->bv_val[i] != '\0' ) { 1068 return LUTIL_PASSWD_ERR; /* passwd must behave like a string */ 1069 } 1070 1071 if( lutil_entropy( salt, sizeof( salt ) ) < 0 ) { 1072 return LUTIL_PASSWD_ERR; 1073 } 1074 1075 for( i=0; i< ( sizeof(salt) - 1 ); i++ ) { 1076 salt[i] = crypt64[ salt[i] % (sizeof(crypt64)-1) ]; 1077 } 1078 salt[sizeof( salt ) - 1 ] = '\0'; 1079 1080 if( salt_format != NULL ) { 1081 /* copy the salt we made into entropy before snprintfing 1082 it back into the salt */ 1083 char entropy[sizeof(salt)]; 1084 strcpy( entropy, (char *) salt ); 1085 snprintf( (char *) salt, sizeof(entropy), salt_format, entropy ); 1086 } 1087 1088 rc = lutil_cryptptr( passwd->bv_val, (char *) salt, &hash->bv_val ); 1089 if ( rc != LUTIL_PASSWD_OK ) return rc; 1090 1091 if( hash->bv_val == NULL ) return -1; 1092 1093 hash->bv_len = strlen( hash->bv_val ); 1094 1095 save = hash->bv_val; 1096 1097 if( hash->bv_len == 0 ) { 1098 rc = LUTIL_PASSWD_ERR; 1099 } else { 1100 rc = pw_string( scheme, hash ); 1101 } 1102 ber_memfree( save ); 1103 return rc; 1104 } 1105 #endif 1106 1107 int lutil_salt_format(const char *format) 1108 { 1109 #ifdef SLAPD_CRYPT 1110 free( salt_format ); 1111 1112 salt_format = format != NULL ? ber_strdup( format ) : NULL; 1113 #endif 1114 1115 return 0; 1116 } 1117 1118 #ifdef SLAPD_CLEARTEXT 1119 static int hash_clear( 1120 const struct berval *scheme, 1121 const struct berval *passwd, 1122 struct berval *hash, 1123 const char **text ) 1124 { 1125 ber_dupbv( hash, (struct berval *)passwd ); 1126 return LUTIL_PASSWD_OK; 1127 } 1128 #endif 1129 1130