git.sur5r.net Git - openldap/blob - libraries/liblutil/passwd.c

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2005 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 #ifdef SLAPD_SPASSWD
  37 #       ifdef HAVE_SASL_SASL_H
  38 #               include <sasl/sasl.h>
  39 #       else
  40 #               include <sasl.h>
  41 #       endif
  42 #endif
  43
  44 #if defined(SLAPD_LMHASH)
  45 #       include <openssl/des.h>
  46 #endif /* SLAPD_LMHASH */
  47
  48 #include <ac/param.h>
  49
  50 #ifdef SLAPD_CRYPT
  51 # include <ac/crypt.h>
  52
  53 # if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
  54 #  ifdef HAVE_SHADOW_H
  55 #       include <shadow.h>
  56 #  endif
  57 #  ifdef HAVE_PWD_H
  58 #       include <pwd.h>
  59 #  endif
  60 #  ifdef HAVE_AIX_SECURITY
  61 #       include <userpw.h>
  62 #  endif
  63 # endif
  64 #endif
  65
  66 #include <lber.h>
  67
  68 #include "ldap_pvt.h"
  69 #include "lber_pvt.h"
  70
  71 #include "lutil_md5.h"
  72 #include "lutil_sha1.h"
  73 #include "lutil.h"
  74
  75 static const unsigned char crypt64[] =
  76         "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890./";
  77
  78 #ifdef SLAPD_CRYPT
  79 static char *salt_format = NULL;
  80 #endif
  81
  82 struct pw_scheme {
  83         struct berval name;
  84         LUTIL_PASSWD_CHK_FUNC *chk_fn;
  85         LUTIL_PASSWD_HASH_FUNC *hash_fn;
  86 };
  87
  88 struct pw_slist {
  89         struct pw_slist *next;
  90         struct pw_scheme s;
  91 };
  92
  93 /* password check routines */
  94
  95 #define SALT_SIZE       4
  96
  97 static LUTIL_PASSWD_CHK_FUNC chk_md5;
  98 static LUTIL_PASSWD_CHK_FUNC chk_smd5;
  99 static LUTIL_PASSWD_HASH_FUNC hash_smd5;
 100 static LUTIL_PASSWD_HASH_FUNC hash_md5;
 101
 102
 103 #ifdef LUTIL_SHA1_BYTES
 104 static LUTIL_PASSWD_CHK_FUNC chk_ssha1;
 105 static LUTIL_PASSWD_CHK_FUNC chk_sha1;
 106 static LUTIL_PASSWD_HASH_FUNC hash_sha1;
 107 static LUTIL_PASSWD_HASH_FUNC hash_ssha1;
 108 #endif
 109
 110 #ifdef SLAPD_LMHASH
 111 static LUTIL_PASSWD_CHK_FUNC chk_lanman;
 112 static LUTIL_PASSWD_HASH_FUNC hash_lanman;
 113 #endif
 114
 115 #ifdef SLAPD_SPASSWD
 116 static LUTIL_PASSWD_CHK_FUNC chk_sasl;
 117 #endif
 118
 119 #ifdef SLAPD_CRYPT
 120 static LUTIL_PASSWD_CHK_FUNC chk_crypt;
 121 static LUTIL_PASSWD_HASH_FUNC hash_crypt;
 122
 123 #if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
 124 static LUTIL_PASSWD_CHK_FUNC chk_unix;
 125 #endif
 126 #endif
 127
 128 /* password hash routines */
 129
 130 #ifdef SLAPD_CLEARTEXT
 131 static LUTIL_PASSWD_HASH_FUNC hash_clear;
 132 #endif
 133
 134 static struct pw_slist *pw_schemes;
 135 static int pw_inited;
 136
 137 static const struct pw_scheme pw_schemes_default[] =
 138 {
 139 #ifdef LUTIL_SHA1_BYTES
 140         { BER_BVC("{SSHA}"),            chk_ssha1, hash_ssha1 },
 141         { BER_BVC("{SHA}"),                     chk_sha1, hash_sha1 },
 142 #endif
 143
 144         { BER_BVC("{SMD5}"),            chk_smd5, hash_smd5 },
 145         { BER_BVC("{MD5}"),                     chk_md5, hash_md5 },
 146
 147 #ifdef SLAPD_LMHASH
 148         { BER_BVC("{LANMAN}"),          chk_lanman, hash_lanman },
 149 #endif /* SLAPD_LMHASH */
 150
 151 #ifdef SLAPD_SPASSWD
 152         { BER_BVC("{SASL}"),            chk_sasl, NULL },
 153 #endif
 154
 155 #ifdef SLAPD_CRYPT
 156         { BER_BVC("{CRYPT}"),           chk_crypt, hash_crypt },
 157 # if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
 158         { BER_BVC("{UNIX}"),            chk_unix, NULL },
 159 # endif
 160 #endif
 161
 162 #ifdef SLAPD_CLEARTEXT
 163         /* pseudo scheme */
 164         { {0, "{CLEARTEXT}"},           NULL, hash_clear },
 165 #endif
 166
 167         { BER_BVNULL, NULL, NULL }
 168 };
 169
 170 int lutil_passwd_add(
 171         struct berval *scheme,
 172         LUTIL_PASSWD_CHK_FUNC *chk,
 173         LUTIL_PASSWD_HASH_FUNC *hash )
 174 {
 175         struct pw_slist *ptr;
 176
 177         if (!pw_inited) lutil_passwd_init();
 178
 179         ptr = ber_memalloc( sizeof( struct pw_slist ));
 180         if (!ptr) return -1;
 181         ptr->next = pw_schemes;
 182         ptr->s.name = *scheme;
 183         ptr->s.chk_fn = chk;
 184         ptr->s.hash_fn = hash;
 185         pw_schemes = ptr;
 186         return 0;
 187 }
 188
 189 void lutil_passwd_init()
 190 {
 191         struct pw_scheme *s;
 192
 193         pw_inited = 1;
 194
 195         for( s=(struct pw_scheme *)pw_schemes_default; s->name.bv_val; s++) {
 196                 if ( lutil_passwd_add( &s->name, s->chk_fn, s->hash_fn ) ) break;
 197         }
 198 }
 199
 200 void lutil_passwd_destroy()
 201 {
 202         struct pw_slist *ptr, *next;
 203
 204         for( ptr=pw_schemes; ptr; ptr=next ) {
 205                 next = ptr->next;
 206                 ber_memfree( ptr );
 207         }
 208 }
 209
 210 static const struct pw_scheme *get_scheme(
 211         const char* scheme )
 212 {
 213         struct pw_slist *pws;
 214         struct berval bv;
 215
 216         if (!pw_inited) lutil_passwd_init();
 217
 218         bv.bv_val = strchr( scheme, '}' );
 219         if ( !bv.bv_val )
 220                 return NULL;
 221
 222         bv.bv_len = bv.bv_val - scheme + 1;
 223         bv.bv_val = (char *) scheme;
 224
 225         for( pws=pw_schemes; pws; pws=pws->next ) {
 226                 if( bv.bv_len != pws->s.name.bv_len )
 227                         continue;
 228                 if( strncasecmp(bv.bv_val, pws->s.name.bv_val, bv.bv_len ) == 0 ) {
 229                         return &(pws->s);
 230                 }
 231         }
 232
 233         return NULL;
 234 }
 235
 236 int lutil_passwd_scheme(
 237         const char* scheme )
 238 {
 239         if( scheme == NULL ) {
 240                 return 0;
 241         }
 242
 243         return get_scheme(scheme) != NULL;
 244 }
 245
 246
 247 static int is_allowed_scheme(
 248         const char* scheme,
 249         const char** schemes )
 250 {
 251         int i;
 252
 253         if( schemes == NULL ) return 1;
 254
 255         for( i=0; schemes[i] != NULL; i++ ) {
 256                 if( strcasecmp( scheme, schemes[i] ) == 0 ) {
 257                         return 1;
 258                 }
 259         }
 260         return 0;
 261 }
 262
 263 static struct berval *passwd_scheme(
 264         const struct pw_scheme *scheme,
 265         const struct berval * passwd,
 266         struct berval *bv,
 267         const char** allowed )
 268 {
 269         if( !is_allowed_scheme( scheme->name.bv_val, allowed ) ) {
 270                 return NULL;
 271         }
 272
 273         if( passwd->bv_len >= scheme->name.bv_len ) {
 274                 if( strncasecmp( passwd->bv_val, scheme->name.bv_val, scheme->name.bv_len ) == 0 ) {
 275                         bv->bv_val = &passwd->bv_val[scheme->name.bv_len];
 276                         bv->bv_len = passwd->bv_len - scheme->name.bv_len;
 277
 278                         return bv;
 279                 }
 280         }
 281
 282         return NULL;
 283 }
 284
 285 /*
 286  * Return 0 if creds are good.
 287  */
 288 int
 289 lutil_passwd(
 290         const struct berval *passwd,    /* stored passwd */
 291         const struct berval *cred,              /* user cred */
 292         const char **schemes,
 293         const char **text )
 294 {
 295         struct pw_slist *pws;
 296
 297         if ( text ) *text = NULL;
 298
 299         if (cred == NULL || cred->bv_len == 0 ||
 300                 passwd == NULL || passwd->bv_len == 0 )
 301         {
 302                 return -1;
 303         }
 304
 305         if (!pw_inited) lutil_passwd_init();
 306
 307         for( pws=pw_schemes; pws; pws=pws->next ) {
 308                 if( pws->s.chk_fn ) {
 309                         struct berval x;
 310                         struct berval *p = passwd_scheme( &(pws->s),
 311                                 passwd, &x, schemes );
 312
 313                         if( p != NULL ) {
 314                                 return (pws->s.chk_fn)( &(pws->s.name), p, cred, text );
 315                         }
 316                 }
 317         }
 318
 319 #ifdef SLAPD_CLEARTEXT
 320         if( is_allowed_scheme("{CLEARTEXT}", schemes ) ) {
 321                 return (( passwd->bv_len == cred->bv_len ) &&
 322                                 ( passwd->bv_val[0] != '{' /*'}'*/ ))
 323                         ? memcmp( passwd->bv_val, cred->bv_val, passwd->bv_len )
 324                         : 1;
 325         }
 326 #endif
 327         return 1;
 328 }
 329
 330 int lutil_passwd_generate( struct berval *pw, ber_len_t len )
 331 {
 332
 333         if( len < 1 ) return -1;
 334
 335         pw->bv_len = len;
 336         pw->bv_val = ber_memalloc( len + 1 );
 337
 338         if( pw->bv_val == NULL ) {
 339                 return -1;
 340         }
 341
 342         if( lutil_entropy( (unsigned char *) pw->bv_val, pw->bv_len) < 0 ) {
 343                 return -1;
 344         }
 345
 346         for( len = 0; len < pw->bv_len; len++ ) {
 347                 pw->bv_val[len] = crypt64[
 348                         pw->bv_val[len] % (sizeof(crypt64)-1) ];
 349         }
 350
 351         pw->bv_val[len] = '\0';
 352
 353         return 0;
 354 }
 355
 356 int lutil_passwd_hash(
 357         const struct berval * passwd,
 358         const char * method,
 359         struct berval *hash,
 360         const char **text )
 361 {
 362         const struct pw_scheme *sc = get_scheme( method );
 363
 364         hash->bv_val = NULL;
 365         hash->bv_len = 0;
 366
 367         if( sc == NULL ) {
 368                 if( text ) *text = "scheme not recognized";
 369                 return -1;
 370         }
 371
 372         if( ! sc->hash_fn ) {
 373                 if( text ) *text = "scheme provided no hash function";
 374                 return -1;
 375         }
 376
 377         if( text ) *text = NULL;
 378
 379         return (sc->hash_fn)( &sc->name, passwd, hash, text );
 380 }
 381
 382 /* pw_string is only called when SLAPD_LMHASH or SLAPD_CRYPT is defined */
 383 #if defined(SLAPD_LMHASH) || defined(SLAPD_CRYPT)
 384 static int pw_string(
 385         const struct berval *sc,
 386         struct berval *passwd )
 387 {
 388         struct berval pw;
 389
 390         pw.bv_len = sc->bv_len + passwd->bv_len;
 391         pw.bv_val = ber_memalloc( pw.bv_len + 1 );
 392
 393         if( pw.bv_val == NULL ) {
 394                 return LUTIL_PASSWD_ERR;
 395         }
 396
 397         AC_MEMCPY( pw.bv_val, sc->bv_val, sc->bv_len );
 398         AC_MEMCPY( &pw.bv_val[sc->bv_len], passwd->bv_val, passwd->bv_len );
 399
 400         pw.bv_val[pw.bv_len] = '\0';
 401         *passwd = pw;
 402
 403         return LUTIL_PASSWD_OK;
 404 }
 405 #endif /* SLAPD_LMHASH || SLAPD_CRYPT */
 406
 407 static int pw_string64(
 408         const struct berval *sc,
 409         const struct berval *hash,
 410         struct berval *b64,
 411         const struct berval *salt )
 412 {
 413         int rc;
 414         struct berval string;
 415         size_t b64len;
 416
 417         if( salt ) {
 418                 /* need to base64 combined string */
 419                 string.bv_len = hash->bv_len + salt->bv_len;
 420                 string.bv_val = ber_memalloc( string.bv_len + 1 );
 421
 422                 if( string.bv_val == NULL ) {
 423                         return LUTIL_PASSWD_ERR;
 424                 }
 425
 426                 AC_MEMCPY( string.bv_val, hash->bv_val,
 427                         hash->bv_len );
 428                 AC_MEMCPY( &string.bv_val[hash->bv_len], salt->bv_val,
 429                         salt->bv_len );
 430                 string.bv_val[string.bv_len] = '\0';
 431
 432         } else {
 433                 string = *hash;
 434         }
 435
 436         b64len = LUTIL_BASE64_ENCODE_LEN( string.bv_len ) + 1;
 437         b64->bv_len = b64len + sc->bv_len;
 438         b64->bv_val = ber_memalloc( b64->bv_len + 1 );
 439
 440         if( b64->bv_val == NULL ) {
 441                 if( salt ) ber_memfree( string.bv_val );
 442                 return LUTIL_PASSWD_ERR;
 443         }
 444
 445         AC_MEMCPY(b64->bv_val, sc->bv_val, sc->bv_len);
 446
 447         rc = lutil_b64_ntop(
 448                 (unsigned char *) string.bv_val, string.bv_len,
 449                 &b64->bv_val[sc->bv_len], b64len );
 450
 451         if( salt ) ber_memfree( string.bv_val );
 452
 453         if( rc < 0 ) {
 454                 return LUTIL_PASSWD_ERR;
 455         }
 456
 457         /* recompute length */
 458         b64->bv_len = sc->bv_len + rc;
 459         assert( strlen(b64->bv_val) == b64->bv_len );
 460         return LUTIL_PASSWD_OK;
 461 }
 462
 463 /* PASSWORD CHECK ROUTINES */
 464
 465 #ifdef LUTIL_SHA1_BYTES
 466 static int chk_ssha1(
 467         const struct berval *sc,
 468         const struct berval * passwd,
 469         const struct berval * cred,
 470         const char **text )
 471 {
 472         lutil_SHA1_CTX SHA1context;
 473         unsigned char SHA1digest[LUTIL_SHA1_BYTES];
 474         int rc;
 475         unsigned char *orig_pass = NULL;
 476
 477         /* safety check -- must have some salt */
 478         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <= sizeof(SHA1digest)) {
 479                 return LUTIL_PASSWD_ERR;
 480         }
 481
 482         /* decode base64 password */
 483         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 484                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 485
 486         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 487
 488         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 489
 490         /* safety check -- must have some salt */
 491         if (rc <= (int)(sizeof(SHA1digest))) {
 492                 ber_memfree(orig_pass);
 493                 return LUTIL_PASSWD_ERR;
 494         }
 495
 496         /* hash credentials with salt */
 497         lutil_SHA1Init(&SHA1context);
 498         lutil_SHA1Update(&SHA1context,
 499                 (const unsigned char *) cred->bv_val, cred->bv_len);
 500         lutil_SHA1Update(&SHA1context,
 501                 (const unsigned char *) &orig_pass[sizeof(SHA1digest)],
 502                 rc - sizeof(SHA1digest));
 503         lutil_SHA1Final(SHA1digest, &SHA1context);
 504
 505         /* compare */
 506         rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest));
 507         ber_memfree(orig_pass);
 508         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 509 }
 510
 511 static int chk_sha1(
 512         const struct berval *sc,
 513         const struct berval * passwd,
 514         const struct berval * cred,
 515         const char **text )
 516 {
 517         lutil_SHA1_CTX SHA1context;
 518         unsigned char SHA1digest[LUTIL_SHA1_BYTES];
 519         int rc;
 520         unsigned char *orig_pass = NULL;
 521
 522         /* safety check */
 523         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) < sizeof(SHA1digest)) {
 524                 return LUTIL_PASSWD_ERR;
 525         }
 526
 527         /* base64 un-encode password */
 528         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 529                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 530
 531         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 532
 533         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 534
 535         if( rc != sizeof(SHA1digest) ) {
 536                 ber_memfree(orig_pass);
 537                 return LUTIL_PASSWD_ERR;
 538         }
 539
 540         /* hash credentials with salt */
 541         lutil_SHA1Init(&SHA1context);
 542         lutil_SHA1Update(&SHA1context,
 543                 (const unsigned char *) cred->bv_val, cred->bv_len);
 544         lutil_SHA1Final(SHA1digest, &SHA1context);
 545
 546         /* compare */
 547         rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest));
 548         ber_memfree(orig_pass);
 549         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 550 }
 551 #endif
 552
 553 static int chk_smd5(
 554         const struct berval *sc,
 555         const struct berval * passwd,
 556         const struct berval * cred,
 557         const char **text )
 558 {
 559         lutil_MD5_CTX MD5context;
 560         unsigned char MD5digest[LUTIL_MD5_BYTES];
 561         int rc;
 562         unsigned char *orig_pass = NULL;
 563
 564         /* safety check */
 565         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <= sizeof(MD5digest)) {
 566                 return LUTIL_PASSWD_ERR;
 567         }
 568
 569         /* base64 un-encode password */
 570         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 571                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 572
 573         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 574
 575         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 576
 577         if (rc <= (int)(sizeof(MD5digest))) {
 578                 ber_memfree(orig_pass);
 579                 return LUTIL_PASSWD_ERR;
 580         }
 581
 582         /* hash credentials with salt */
 583         lutil_MD5Init(&MD5context);
 584         lutil_MD5Update(&MD5context,
 585                 (const unsigned char *) cred->bv_val,
 586                 cred->bv_len );
 587         lutil_MD5Update(&MD5context,
 588                 &orig_pass[sizeof(MD5digest)],
 589                 rc - sizeof(MD5digest));
 590         lutil_MD5Final(MD5digest, &MD5context);
 591
 592         /* compare */
 593         rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest));
 594         ber_memfree(orig_pass);
 595         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 596 }
 597
 598 static int chk_md5(
 599         const struct berval *sc,
 600         const struct berval * passwd,
 601         const struct berval * cred,
 602         const char **text )
 603 {
 604         lutil_MD5_CTX MD5context;
 605         unsigned char MD5digest[LUTIL_MD5_BYTES];
 606         int rc;
 607         unsigned char *orig_pass = NULL;
 608
 609         /* safety check */
 610         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) < sizeof(MD5digest)) {
 611                 return LUTIL_PASSWD_ERR;
 612         }
 613
 614         /* base64 un-encode password */
 615         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 616                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 617
 618         if( orig_pass == NULL ) return LUTIL_PASSWD_ERR;
 619
 620         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 621         if ( rc != sizeof(MD5digest) ) {
 622                 ber_memfree(orig_pass);
 623                 return LUTIL_PASSWD_ERR;
 624         }
 625
 626         /* hash credentials with salt */
 627         lutil_MD5Init(&MD5context);
 628         lutil_MD5Update(&MD5context,
 629                 (const unsigned char *) cred->bv_val,
 630                 cred->bv_len );
 631         lutil_MD5Final(MD5digest, &MD5context);
 632
 633         /* compare */
 634         rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest));
 635         ber_memfree(orig_pass);
 636         return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 637 }
 638
 639 #ifdef SLAPD_LMHASH
 640 /* pseudocode from RFC2433
 641  * A.2 LmPasswordHash()
 642  *
 643  *    LmPasswordHash(
 644  *    IN  0-to-14-oem-char Password,
 645  *    OUT 16-octet         PasswordHash )
 646  *    {
 647  *       Set UcasePassword to the uppercased Password
 648  *       Zero pad UcasePassword to 14 characters
 649  *
 650  *       DesHash( 1st 7-octets of UcasePassword,
 651  *                giving 1st 8-octets of PasswordHash )
 652  *
 653  *       DesHash( 2nd 7-octets of UcasePassword,
 654  *                giving 2nd 8-octets of PasswordHash )
 655  *    }
 656  *
 657  *
 658  * A.3 DesHash()
 659  *
 660  *    DesHash(
 661  *    IN  7-octet Clear,
 662  *    OUT 8-octet Cypher )
 663  *    {
 664  *        *
 665  *        * Make Cypher an irreversibly encrypted form of Clear by
 666  *        * encrypting known text using Clear as the secret key.
 667  *        * The known text consists of the string
 668  *        *
 669  *        *              KGS!@#$%
 670  *        *
 671  *
 672  *       Set StdText to "KGS!@#$%"
 673  *       DesEncrypt( StdText, Clear, giving Cypher )
 674  *    }
 675  *
 676  *
 677  * A.4 DesEncrypt()
 678  *
 679  *    DesEncrypt(
 680  *    IN  8-octet Clear,
 681  *    IN  7-octet Key,
 682  *    OUT 8-octet Cypher )
 683  *    {
 684  *        *
 685  *        * Use the DES encryption algorithm [4] in ECB mode [9]
 686  *        * to encrypt Clear into Cypher such that Cypher can
 687  *        * only be decrypted back to Clear by providing Key.
 688  *        * Note that the DES algorithm takes as input a 64-bit
 689  *        * stream where the 8th, 16th, 24th, etc.  bits are
 690  *        * parity bits ignored by the encrypting algorithm.
 691  *        * Unless you write your own DES to accept 56-bit input
 692  *        * without parity, you will need to insert the parity bits
 693  *        * yourself.
 694  *        *
 695  *    }
 696  */
 697
 698 static void lmPasswd_to_key(
 699         const char *lmPasswd,
 700         des_cblock *key)
 701 {
 702         const unsigned char *lpw = (const unsigned char *) lmPasswd;
 703         unsigned char *k = (unsigned char *) key;
 704
 705         /* make room for parity bits */
 706         k[0] = lpw[0];
 707         k[1] = ((lpw[0] & 0x01) << 7) | (lpw[1] >> 1);
 708         k[2] = ((lpw[1] & 0x03) << 6) | (lpw[2] >> 2);
 709         k[3] = ((lpw[2] & 0x07) << 5) | (lpw[3] >> 3);
 710         k[4] = ((lpw[3] & 0x0F) << 4) | (lpw[4] >> 4);
 711         k[5] = ((lpw[4] & 0x1F) << 3) | (lpw[5] >> 5);
 712         k[6] = ((lpw[5] & 0x3F) << 2) | (lpw[6] >> 6);
 713         k[7] = ((lpw[6] & 0x7F) << 1);
 714
 715         des_set_odd_parity( key );
 716 }
 717
 718 static int chk_lanman(
 719         const struct berval *scheme,
 720         const struct berval *passwd,
 721         const struct berval *cred,
 722         const char **text )
 723 {
 724         int i;
 725         char UcasePassword[15];
 726         des_cblock key;
 727         des_key_schedule schedule;
 728         des_cblock StdText = "KGS!@#$%";
 729         des_cblock PasswordHash1, PasswordHash2;
 730         char PasswordHash[33], storedPasswordHash[33];
 731
 732         for( i=0; i<cred->bv_len; i++) {
 733                 if(cred->bv_val[i] == '\0') {
 734                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 735                 }
 736         }
 737
 738         if( cred->bv_val[i] != '\0' ) {
 739                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 740         }
 741
 742         strncpy( UcasePassword, cred->bv_val, 14 );
 743         UcasePassword[14] = '\0';
 744         ldap_pvt_str2upper( UcasePassword );
 745
 746         lmPasswd_to_key( UcasePassword, &key );
 747         des_set_key_unchecked( &key, schedule );
 748         des_ecb_encrypt( &StdText, &PasswordHash1, schedule , DES_ENCRYPT );
 749
 750         lmPasswd_to_key( &UcasePassword[7], &key );
 751         des_set_key_unchecked( &key, schedule );
 752         des_ecb_encrypt( &StdText, &PasswordHash2, schedule , DES_ENCRYPT );
 753
 754         sprintf( PasswordHash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 755                 PasswordHash1[0],PasswordHash1[1],PasswordHash1[2],PasswordHash1[3],
 756                 PasswordHash1[4],PasswordHash1[5],PasswordHash1[6],PasswordHash1[7],
 757                 PasswordHash2[0],PasswordHash2[1],PasswordHash2[2],PasswordHash2[3],
 758                 PasswordHash2[4],PasswordHash2[5],PasswordHash2[6],PasswordHash2[7] );
 759
 760         /* as a precaution convert stored password hash to lower case */
 761         strncpy( storedPasswordHash, passwd->bv_val, 32 );
 762         storedPasswordHash[32] = '\0';
 763         ldap_pvt_str2lower( storedPasswordHash );
 764
 765         return memcmp( PasswordHash, storedPasswordHash, 32) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 766 }
 767 #endif /* SLAPD_LMHASH */
 768
 769 #ifdef SLAPD_SPASSWD
 770 #ifdef HAVE_CYRUS_SASL
 771 sasl_conn_t *lutil_passwd_sasl_conn = NULL;
 772 #endif
 773
 774 static int chk_sasl(
 775         const struct berval *sc,
 776         const struct berval * passwd,
 777         const struct berval * cred,
 778         const char **text )
 779 {
 780         unsigned int i;
 781         int rtn;
 782
 783         for( i=0; i<cred->bv_len; i++) {
 784                 if(cred->bv_val[i] == '\0') {
 785                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 786                 }
 787         }
 788
 789         if( cred->bv_val[i] != '\0' ) {
 790                 return LUTIL_PASSWD_ERR;        /* cred must behave like a string */
 791         }
 792
 793         for( i=0; i<passwd->bv_len; i++) {
 794                 if(passwd->bv_val[i] == '\0') {
 795                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 796                 }
 797         }
 798
 799         if( passwd->bv_val[i] != '\0' ) {
 800                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 801         }
 802
 803         rtn = LUTIL_PASSWD_ERR;
 804
 805 #ifdef HAVE_CYRUS_SASL
 806         if( lutil_passwd_sasl_conn != NULL ) {
 807                 int sc;
 808 # if SASL_VERSION_MAJOR < 2
 809                 sc = sasl_checkpass( lutil_passwd_sasl_conn,
 810                         passwd->bv_val, passwd->bv_len,
 811                         cred->bv_val, cred->bv_len,
 812                         text );
 813 # else
 814                 sc = sasl_checkpass( lutil_passwd_sasl_conn,
 815                         passwd->bv_val, passwd->bv_len,
 816                         cred->bv_val, cred->bv_len );
 817 # endif
 818                 rtn = ( sc != SASL_OK ) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 819         }
 820 #endif
 821
 822         return rtn;
 823 }
 824 #endif
 825
 826 #ifdef SLAPD_CRYPT
 827 static int chk_crypt(
 828         const struct berval *sc,
 829         const struct berval * passwd,
 830         const struct berval * cred,
 831         const char **text )
 832 {
 833         unsigned int i;
 834
 835         for( i=0; i<cred->bv_len; i++) {
 836                 if(cred->bv_val[i] == '\0') {
 837                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 838                 }
 839         }
 840
 841         if( cred->bv_val[i] != '\0' ) {
 842                 return LUTIL_PASSWD_ERR;        /* cred must behave like a string */
 843         }
 844
 845         if( passwd->bv_len < 2 ) {
 846                 return LUTIL_PASSWD_ERR;        /* passwd must be at least two characters long */
 847         }
 848
 849         for( i=0; i<passwd->bv_len; i++) {
 850                 if(passwd->bv_val[i] == '\0') {
 851                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 852                 }
 853         }
 854
 855         if( passwd->bv_val[i] != '\0' ) {
 856                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 857         }
 858
 859         cr = crypt( cred->bv_val, passwd->bv_val );
 860
 861         if( cr == NULL || cr[0] == '\0' ) {
 862                 /* salt must have been invalid */
 863                 return LUTIL_PASSWD_ERR;
 864         }
 865
 866         return strcmp( passwd->bv_val, cr ) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 867 }
 868
 869 # if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
 870 static int chk_unix(
 871         const struct berval *sc,
 872         const struct berval * passwd,
 873         const struct berval * cred,
 874         const char **text )
 875 {
 876         unsigned int i;
 877         char *pw;
 878
 879         for( i=0; i<cred->bv_len; i++) {
 880                 if(cred->bv_val[i] == '\0') {
 881                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 882                 }
 883         }
 884         if( cred->bv_val[i] != '\0' ) {
 885                 return LUTIL_PASSWD_ERR;        /* cred must behave like a string */
 886         }
 887
 888         for( i=0; i<passwd->bv_len; i++) {
 889                 if(passwd->bv_val[i] == '\0') {
 890                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 891                 }
 892         }
 893
 894         if( passwd->bv_val[i] != '\0' ) {
 895                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 896         }
 897
 898         {
 899                 struct passwd *pwd = getpwnam(passwd->bv_val);
 900
 901                 if(pwd == NULL) {
 902                         return LUTIL_PASSWD_ERR;        /* not found */
 903                 }
 904
 905                 pw = pwd->pw_passwd;
 906         }
 907 #  ifdef HAVE_GETSPNAM
 908         {
 909                 struct spwd *spwd = getspnam(passwd->bv_val);
 910
 911                 if(spwd != NULL) {
 912                         pw = spwd->sp_pwdp;
 913                 }
 914         }
 915 #  endif
 916 #  ifdef HAVE_AIX_SECURITY
 917         {
 918                 struct userpw *upw = getuserpw(passwd->bv_val);
 919
 920                 if (upw != NULL) {
 921                         pw = upw->upw_passwd;
 922                 }
 923         }
 924 #  endif
 925
 926         if( pw == NULL || pw[0] == '\0' || pw[1] == '\0' ) {
 927                 /* password must must be at least two characters long */
 928                 return LUTIL_PASSWD_ERR;
 929         }
 930
 931         cr = crypt(cred->bv_val, pw);
 932
 933         if( cr == NULL || cr[0] == '\0' ) {
 934                 /* salt must have been invalid */
 935                 return LUTIL_PASSWD_ERR;
 936         }
 937
 938         return strcmp(pw, cr) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 939
 940 }
 941 # endif
 942 #endif
 943
 944 /* PASSWORD GENERATION ROUTINES */
 945
 946 #ifdef LUTIL_SHA1_BYTES
 947 static int hash_ssha1(
 948         const struct berval *scheme,
 949         const struct berval  *passwd,
 950         struct berval *hash,
 951         const char **text )
 952 {
 953         lutil_SHA1_CTX  SHA1context;
 954         unsigned char   SHA1digest[LUTIL_SHA1_BYTES];
 955         char            saltdata[SALT_SIZE];
 956         struct berval digest;
 957         struct berval salt;
 958
 959         digest.bv_val = (char *) SHA1digest;
 960         digest.bv_len = sizeof(SHA1digest);
 961         salt.bv_val = saltdata;
 962         salt.bv_len = sizeof(saltdata);
 963
 964         if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) {
 965                 return LUTIL_PASSWD_ERR;
 966         }
 967
 968         lutil_SHA1Init( &SHA1context );
 969         lutil_SHA1Update( &SHA1context,
 970                 (const unsigned char *)passwd->bv_val, passwd->bv_len );
 971         lutil_SHA1Update( &SHA1context,
 972                 (const unsigned char *)salt.bv_val, salt.bv_len );
 973         lutil_SHA1Final( SHA1digest, &SHA1context );
 974
 975         return pw_string64( scheme, &digest, hash, &salt);
 976 }
 977
 978 static int hash_sha1(
 979         const struct berval *scheme,
 980         const struct berval  *passwd,
 981         struct berval *hash,
 982         const char **text )
 983 {
 984         lutil_SHA1_CTX  SHA1context;
 985         unsigned char   SHA1digest[LUTIL_SHA1_BYTES];
 986         struct berval digest;
 987         digest.bv_val = (char *) SHA1digest;
 988         digest.bv_len = sizeof(SHA1digest);
 989
 990         lutil_SHA1Init( &SHA1context );
 991         lutil_SHA1Update( &SHA1context,
 992                 (const unsigned char *)passwd->bv_val, passwd->bv_len );
 993         lutil_SHA1Final( SHA1digest, &SHA1context );
 994
 995         return pw_string64( scheme, &digest, hash, NULL);
 996 }
 997 #endif
 998
 999 static int hash_smd5(
1000         const struct berval *scheme,
1001         const struct berval  *passwd,
1002         struct berval *hash,
1003         const char **text )
1004 {
1005         lutil_MD5_CTX   MD5context;
1006         unsigned char   MD5digest[LUTIL_MD5_BYTES];
1007         char            saltdata[SALT_SIZE];
1008         struct berval digest;
1009         struct berval salt;
1010
1011         digest.bv_val = (char *) MD5digest;
1012         digest.bv_len = sizeof(MD5digest);
1013         salt.bv_val = saltdata;
1014         salt.bv_len = sizeof(saltdata);
1015
1016         if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) {
1017                 return LUTIL_PASSWD_ERR;
1018         }
1019
1020         lutil_MD5Init( &MD5context );
1021         lutil_MD5Update( &MD5context,
1022                 (const unsigned char *) passwd->bv_val, passwd->bv_len );
1023         lutil_MD5Update( &MD5context,
1024                 (const unsigned char *) salt.bv_val, salt.bv_len );
1025         lutil_MD5Final( MD5digest, &MD5context );
1026
1027         return pw_string64( scheme, &digest, hash, &salt );
1028 }
1029
1030 static int hash_md5(
1031         const struct berval *scheme,
1032         const struct berval  *passwd,
1033         struct berval *hash,
1034         const char **text )
1035 {
1036         lutil_MD5_CTX   MD5context;
1037         unsigned char   MD5digest[LUTIL_MD5_BYTES];
1038
1039         struct berval digest;
1040
1041         digest.bv_val = (char *) MD5digest;
1042         digest.bv_len = sizeof(MD5digest);
1043
1044         lutil_MD5Init( &MD5context );
1045         lutil_MD5Update( &MD5context,
1046                 (const unsigned char *) passwd->bv_val, passwd->bv_len );
1047         lutil_MD5Final( MD5digest, &MD5context );
1048
1049         return pw_string64( scheme, &digest, hash, NULL );
1050 ;
1051 }
1052
1053 #ifdef SLAPD_LMHASH
1054 static int hash_lanman(
1055         const struct berval *scheme,
1056         const struct berval *passwd,
1057         struct berval *hash,
1058         const char **text )
1059 {
1060
1061         int i;
1062         char UcasePassword[15];
1063         des_cblock key;
1064         des_key_schedule schedule;
1065         des_cblock StdText = "KGS!@#$%";
1066         des_cblock PasswordHash1, PasswordHash2;
1067         char PasswordHash[33];
1068
1069         for( i=0; i<passwd->bv_len; i++) {
1070                 if(passwd->bv_val[i] == '\0') {
1071                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
1072                 }
1073         }
1074
1075         if( passwd->bv_val[i] != '\0' ) {
1076                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
1077         }
1078
1079         strncpy( UcasePassword, passwd->bv_val, 14 );
1080         UcasePassword[14] = '\0';
1081         ldap_pvt_str2upper( UcasePassword );
1082
1083         lmPasswd_to_key( UcasePassword, &key );
1084         des_set_key_unchecked( &key, schedule );
1085         des_ecb_encrypt( &StdText, &PasswordHash1, schedule , DES_ENCRYPT );
1086
1087         lmPasswd_to_key( &UcasePassword[7], &key );
1088         des_set_key_unchecked( &key, schedule );
1089         des_ecb_encrypt( &StdText, &PasswordHash2, schedule , DES_ENCRYPT );
1090
1091         sprintf( PasswordHash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
1092                 PasswordHash1[0],PasswordHash1[1],PasswordHash1[2],PasswordHash1[3],
1093                 PasswordHash1[4],PasswordHash1[5],PasswordHash1[6],PasswordHash1[7],
1094                 PasswordHash2[0],PasswordHash2[1],PasswordHash2[2],PasswordHash2[3],
1095                 PasswordHash2[4],PasswordHash2[5],PasswordHash2[6],PasswordHash2[7] );
1096
1097         hash->bv_val = PasswordHash;
1098         hash->bv_len = 32;
1099
1100         return pw_string( scheme, hash );
1101 }
1102 #endif /* SLAPD_LMHASH */
1103
1104 #ifdef SLAPD_CRYPT
1105 static int hash_crypt(
1106         const struct berval *scheme,
1107         const struct berval *passwd,
1108         struct berval *hash,
1109         const char **text )
1110 {
1111         unsigned char salt[32]; /* salt suitable for most anything */
1112         unsigned int i;
1113
1114         for( i=0; i<passwd->bv_len; i++) {
1115                 if(passwd->bv_val[i] == '\0') {
1116                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
1117                 }
1118         }
1119
1120         if( passwd->bv_val[i] != '\0' ) {
1121                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
1122         }
1123
1124         if( lutil_entropy( salt, sizeof( salt ) ) < 0 ) {
1125                 return LUTIL_PASSWD_ERR;
1126         }
1127
1128         for( i=0; i< ( sizeof(salt) - 1 ); i++ ) {
1129                 salt[i] = crypt64[ salt[i] % (sizeof(crypt64)-1) ];
1130         }
1131         salt[sizeof( salt ) - 1 ] = '\0';
1132
1133         if( salt_format != NULL ) {
1134                 /* copy the salt we made into entropy before snprintfing
1135                    it back into the salt */
1136                 char entropy[sizeof(salt)];
1137                 strcpy( entropy, (char *) salt );
1138                 snprintf( (char *) salt, sizeof(entropy), salt_format, entropy );
1139         }
1140
1141         hash->bv_val = crypt( passwd->bv_val, (char *) salt );
1142
1143         if( hash->bv_val == NULL ) return -1;
1144
1145         hash->bv_len = strlen( hash->bv_val );
1146
1147         if( hash->bv_len == 0 ) {
1148                 return LUTIL_PASSWD_ERR;
1149         }
1150
1151         return pw_string( scheme, hash );
1152 }
1153 #endif
1154
1155 int lutil_salt_format(const char *format)
1156 {
1157 #ifdef SLAPD_CRYPT
1158         free( salt_format );
1159
1160         salt_format = format != NULL ? strdup( format ) : NULL;
1161 #endif
1162
1163         return 0;
1164 }
1165
1166 #ifdef SLAPD_CLEARTEXT
1167 static int hash_clear(
1168         const struct berval *scheme,
1169         const struct berval  *passwd,
1170         struct berval *hash,
1171         const char **text )
1172 {
1173         ber_dupbv( hash, (struct berval *)passwd );
1174         return LUTIL_PASSWD_OK;
1175 }
1176 #endif
1177