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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6 /*
   7  * int lutil_passwd(
   8  *      const struct berval *passwd,
   9  *      const struct berval *cred,
  10  *      const char **schemes )
  11  *
  12  * Returns true if user supplied credentials (cred) matches
  13  * the stored password (passwd).
  14  *
  15  * Due to the use of the crypt(3) function
  16  * this routine is NOT thread-safe.
  17  */
  18
  19 #include "portable.h"
  20
  21 #include <stdio.h>
  22 #include <ac/stdlib.h>
  23 #include <ac/string.h>
  24 #include <ac/unistd.h>
  25
  26 #ifdef SLAPD_SPASSWD
  27 #       ifdef HAVE_SASL_SASL_H
  28 #               include <sasl/sasl.h>
  29 #       else
  30 #               include <sasl.h>
  31 #       endif
  32 #endif
  33
  34 #ifdef SLAPD_KPASSWD
  35 #       include <ac/krb.h>
  36 #       include <ac/krb5.h>
  37 #endif
  38
  39 /* KPASSWD/krb.h brings in a conflicting des.h so don't use both.
  40  * configure currently requires OpenSSL to enable LMHASH. Obviously
  41  * this requirement can be fulfilled by the KRB DES library as well.
  42  */
  43 #if defined(SLAPD_LMHASH) && !defined(DES_ENCRYPT)
  44 #       include <openssl/des.h>
  45 #endif /* SLAPD_LMHASH */
  46
  47 #include <ac/param.h>
  48
  49 #ifdef SLAPD_CRYPT
  50 # include <ac/crypt.h>
  51
  52 # if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
  53 #  ifdef HAVE_SHADOW_H
  54 #       include <shadow.h>
  55 #  endif
  56 #  ifdef HAVE_PWD_H
  57 #       include <pwd.h>
  58 #  endif
  59 #  ifdef HAVE_AIX_SECURITY
  60 #       include <userpw.h>
  61 #  endif
  62 # endif
  63 #endif
  64
  65 #include <lber.h>
  66
  67 #include "ldap_pvt.h"
  68 #include "lber_pvt.h"
  69
  70 #include "lutil_md5.h"
  71 #include "lutil_sha1.h"
  72 #include "lutil.h"
  73
  74 static const unsigned char crypt64[] =
  75         "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890./";
  76
  77 #ifdef SLAPD_CRYPT
  78 static char *salt_format = NULL;
  79 #endif
  80
  81 struct pw_scheme {
  82         struct berval name;
  83         LUTIL_PASSWD_CHK_FUNC *chk_fn;
  84         LUTIL_PASSWD_HASH_FUNC *hash_fn;
  85 };
  86
  87 struct pw_slist {
  88         struct pw_slist *next;
  89         struct pw_scheme s;
  90 };
  91
  92 /* password check routines */
  93
  94 static LUTIL_PASSWD_CHK_FUNC chk_md5;
  95 static LUTIL_PASSWD_CHK_FUNC chk_smd5;
  96 static LUTIL_PASSWD_HASH_FUNC hash_smd5;
  97 static LUTIL_PASSWD_HASH_FUNC hash_md5;
  98
  99
 100 #ifdef LUTIL_SHA1_BYTES
 101 static LUTIL_PASSWD_CHK_FUNC chk_ssha1;
 102 static LUTIL_PASSWD_CHK_FUNC chk_sha1;
 103 static LUTIL_PASSWD_HASH_FUNC hash_sha1;
 104 static LUTIL_PASSWD_HASH_FUNC hash_ssha1;
 105 #endif
 106
 107 #ifdef SLAPD_LMHASH
 108 static LUTIL_PASSWD_CHK_FUNC chk_lanman;
 109 static LUTIL_PASSWD_HASH_FUNC hash_lanman;
 110 #endif
 111
 112 #ifdef SLAPD_NS_MTA_MD5
 113 static LUTIL_PASSWD_CHK_FUNC chk_ns_mta_md5;
 114 #endif
 115
 116 #ifdef SLAPD_SPASSWD
 117 static LUTIL_PASSWD_CHK_FUNC chk_sasl;
 118 #endif
 119
 120 #ifdef SLAPD_KPASSWD
 121 static LUTIL_PASSWD_CHK_FUNC chk_kerberos;
 122 #endif
 123
 124 #ifdef SLAPD_CRYPT
 125 static LUTIL_PASSWD_CHK_FUNC chk_crypt;
 126 static LUTIL_PASSWD_HASH_FUNC hash_crypt;
 127
 128 #if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
 129 static LUTIL_PASSWD_CHK_FUNC chk_unix;
 130 #endif
 131 #endif
 132
 133 /* password hash routines */
 134
 135 #ifdef SLAPD_CLEARTEXT
 136 static LUTIL_PASSWD_HASH_FUNC hash_clear;
 137 #endif
 138
 139 static struct pw_slist *pw_schemes;
 140
 141 static const struct pw_scheme pw_schemes_default[] =
 142 {
 143 #ifdef LUTIL_SHA1_BYTES
 144         { BER_BVC("{SSHA}"),            chk_ssha1, hash_ssha1 },
 145         { BER_BVC("{SHA}"),                     chk_sha1, hash_sha1 },
 146 #endif
 147
 148         { BER_BVC("{SMD5}"),            chk_smd5, hash_smd5 },
 149         { BER_BVC("{MD5}"),                     chk_md5, hash_md5 },
 150
 151 #ifdef SLAPD_LMHASH
 152         { BER_BVC("{LANMAN}"),          chk_lanman, hash_lanman },
 153 #endif /* SLAPD_LMHASH */
 154
 155 #ifdef SLAPD_NS_MTA_MD5
 156         { BER_BVC("{NS-MTA-MD5}"),      chk_ns_mta_md5, NULL },
 157 #endif /* SLAPD_NS_MTA_MD5 */
 158
 159 #ifdef SLAPD_SPASSWD
 160         { BER_BVC("{SASL}"),            chk_sasl, NULL },
 161 #endif
 162
 163 #ifdef SLAPD_KPASSWD
 164         { BER_BVC("{KERBEROS}"),        chk_kerberos, NULL },
 165 #endif
 166
 167 #ifdef SLAPD_CRYPT
 168         { BER_BVC("{CRYPT}"),           chk_crypt, hash_crypt },
 169 # if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
 170         { BER_BVC("{UNIX}"),            chk_unix, NULL },
 171 # endif
 172 #endif
 173
 174 #ifdef SLAPD_CLEARTEXT
 175         /* pseudo scheme */
 176         { {0, "{CLEARTEXT}"},           NULL, hash_clear },
 177 #endif
 178
 179         { BER_BVNULL, NULL, NULL }
 180 };
 181
 182 int lutil_passwd_add(
 183         struct berval *scheme,
 184         LUTIL_PASSWD_CHK_FUNC *chk,
 185         LUTIL_PASSWD_HASH_FUNC *hash )
 186 {
 187         struct pw_slist *ptr;
 188
 189         ptr = ber_memalloc( sizeof( struct pw_slist ));
 190         if (!ptr) return -1;
 191         ptr->next = pw_schemes;
 192         ptr->s.name = *scheme;
 193         ptr->s.chk_fn = chk;
 194         ptr->s.hash_fn = hash;
 195         pw_schemes = ptr;
 196         return 0;
 197 }
 198
 199 void lutil_passwd_init()
 200 {
 201         struct pw_slist *ptr;
 202         struct pw_scheme *s;
 203
 204         for( s=(struct pw_scheme *)pw_schemes_default; s->name.bv_val; s++) {
 205                 if ( lutil_passwd_add( &s->name, s->chk_fn, s->hash_fn )) break;
 206         }
 207 }
 208
 209 void lutil_passwd_destroy()
 210 {
 211         struct pw_slist *ptr, *next;
 212
 213         for( ptr=pw_schemes; ptr; ptr=next ) {
 214                 next = ptr->next;
 215                 ber_memfree( ptr );
 216         }
 217 }
 218
 219 static const struct pw_scheme *get_scheme(
 220         const char* scheme )
 221 {
 222         struct pw_slist *pws;
 223
 224         if (!pw_schemes) lutil_passwd_init();
 225
 226         for( pws=pw_schemes; pws; pws=pws->next ) {
 227                 if( strcasecmp(scheme, pws->s.name.bv_val ) == 0 ) {
 228                         return &(pws->s);
 229                 }
 230         }
 231
 232         return NULL;
 233 }
 234
 235 int lutil_passwd_scheme(
 236         const char* scheme )
 237 {
 238         if( scheme == NULL ) {
 239                 return 0;
 240         }
 241
 242         return get_scheme(scheme) != NULL;
 243 }
 244
 245
 246 static int is_allowed_scheme(
 247         const char* scheme,
 248         const char** schemes )
 249 {
 250         int i;
 251
 252         if( schemes == NULL ) return 1;
 253
 254         for( i=0; schemes[i] != NULL; i++ ) {
 255                 if( strcasecmp( scheme, schemes[i] ) == 0 ) {
 256                         return 1;
 257                 }
 258         }
 259         return 0;
 260 }
 261
 262 static struct berval *passwd_scheme(
 263         const struct pw_scheme *scheme,
 264         const struct berval * passwd,
 265         struct berval *bv,
 266         const char** allowed )
 267 {
 268         if( !is_allowed_scheme( scheme->name.bv_val, allowed ) ) {
 269                 return NULL;
 270         }
 271
 272         if( passwd->bv_len >= scheme->name.bv_len ) {
 273                 if( strncasecmp( passwd->bv_val, scheme->name.bv_val, scheme->name.bv_len ) == 0 ) {
 274                         bv->bv_val = &passwd->bv_val[scheme->name.bv_len];
 275                         bv->bv_len = passwd->bv_len - scheme->name.bv_len;
 276
 277                         return bv;
 278                 }
 279         }
 280
 281         return NULL;
 282 }
 283
 284 /*
 285  * Return 0 if creds are good.
 286  */
 287 int
 288 lutil_passwd(
 289         const struct berval *passwd,    /* stored passwd */
 290         const struct berval *cred,              /* user cred */
 291         const char **schemes )
 292 {
 293         struct pw_slist *pws;
 294
 295         if (cred == NULL || cred->bv_len == 0 ||
 296                 passwd == NULL || passwd->bv_len == 0 )
 297         {
 298                 return -1;
 299         }
 300
 301         if (!pw_schemes) lutil_passwd_init();
 302
 303         for( pws=pw_schemes; pws; pws=pws->next ) {
 304                 if( pws->s.chk_fn ) {
 305                         struct berval x;
 306                         struct berval *p = passwd_scheme( &(pws->s),
 307                                 passwd, &x, schemes );
 308
 309                         if( p != NULL ) {
 310                                 return (pws->s.chk_fn)( &(pws->s.name), p, cred );
 311                         }
 312                 }
 313         }
 314
 315 #ifdef SLAPD_CLEARTEXT
 316         if( is_allowed_scheme("{CLEARTEXT}", schemes ) ) {
 317                 return (( passwd->bv_len == cred->bv_len ) &&
 318                                 ( passwd->bv_val[0] != '{' /*'}'*/ ))
 319                         ? memcmp( passwd->bv_val, cred->bv_val, passwd->bv_len )
 320                         : 1;
 321         }
 322 #endif
 323         return 1;
 324 }
 325
 326 struct berval * lutil_passwd_generate( ber_len_t len )
 327 {
 328         struct berval *pw;
 329
 330         if( len < 1 ) return NULL;
 331
 332         pw = ber_memalloc( sizeof( struct berval ) );
 333         if( pw == NULL ) return NULL;
 334
 335         pw->bv_len = len;
 336         pw->bv_val = ber_memalloc( len + 1 );
 337
 338         if( pw->bv_val == NULL ) {
 339                 ber_memfree( pw );
 340                 return NULL;
 341         }
 342
 343         if( lutil_entropy( pw->bv_val, pw->bv_len) < 0 ) {
 344                 ber_bvfree( pw );
 345                 return NULL;
 346         }
 347
 348         for( len = 0; len < pw->bv_len; len++ ) {
 349                 pw->bv_val[len] = crypt64[
 350                         pw->bv_val[len] % (sizeof(crypt64)-1) ];
 351         }
 352
 353         pw->bv_val[len] = '\0';
 354
 355         return pw;
 356 }
 357
 358 struct berval * lutil_passwd_hash(
 359         const struct berval * passwd,
 360         const char * method )
 361 {
 362         const struct pw_scheme *sc = get_scheme( method );
 363
 364         if( sc == NULL ) return NULL;
 365         if( ! sc->hash_fn ) return NULL;
 366
 367         return (sc->hash_fn)( &sc->name, passwd );
 368 }
 369
 370 /* pw_string is only called when SLAPD_LMHASH or SLAPD_CRYPT is defined */
 371 #if defined(SLAPD_LMHASH) || defined(SLAPD_CRYPT)
 372 static struct berval * pw_string(
 373         const struct berval *sc,
 374         const struct berval *passwd )
 375 {
 376         struct berval *pw = ber_memalloc( sizeof( struct berval ) );
 377         if( pw == NULL ) return NULL;
 378
 379         pw->bv_len = sc->bv_len + passwd->bv_len;
 380         pw->bv_val = ber_memalloc( pw->bv_len + 1 );
 381
 382         if( pw->bv_val == NULL ) {
 383                 ber_memfree( pw );
 384                 return NULL;
 385         }
 386
 387         AC_MEMCPY( pw->bv_val, sc->bv_val, sc->bv_len );
 388         AC_MEMCPY( &pw->bv_val[sc->bv_len], passwd->bv_val, passwd->bv_len );
 389
 390         pw->bv_val[pw->bv_len] = '\0';
 391         return pw;
 392 }
 393 #endif /* SLAPD_LMHASH || SLAPD_CRYPT */
 394
 395 static struct berval * pw_string64(
 396         const struct berval *sc,
 397         const struct berval *hash,
 398         const struct berval *salt )
 399 {
 400         int rc;
 401         struct berval string;
 402         struct berval *b64 = ber_memalloc( sizeof(struct berval) );
 403         size_t b64len;
 404
 405         if( b64 == NULL ) return NULL;
 406
 407         if( salt ) {
 408                 /* need to base64 combined string */
 409                 string.bv_len = hash->bv_len + salt->bv_len;
 410                 string.bv_val = ber_memalloc( string.bv_len + 1 );
 411
 412                 if( string.bv_val == NULL ) {
 413                         ber_memfree( b64 );
 414                         return NULL;
 415                 }
 416
 417                 AC_MEMCPY( string.bv_val, hash->bv_val,
 418                         hash->bv_len );
 419                 AC_MEMCPY( &string.bv_val[hash->bv_len], salt->bv_val,
 420                         salt->bv_len );
 421                 string.bv_val[string.bv_len] = '\0';
 422
 423         } else {
 424                 string = *hash;
 425         }
 426
 427         b64len = LUTIL_BASE64_ENCODE_LEN( string.bv_len ) + 1;
 428         b64->bv_len = b64len + sc->bv_len;
 429         b64->bv_val = ber_memalloc( b64->bv_len + 1 );
 430
 431         if( b64->bv_val == NULL ) {
 432                 if( salt ) ber_memfree( string.bv_val );
 433                 ber_memfree( b64 );
 434                 return NULL;
 435         }
 436
 437         AC_MEMCPY(b64->bv_val, sc->bv_val, sc->bv_len);
 438
 439         rc = lutil_b64_ntop(
 440                 string.bv_val, string.bv_len,
 441                 &b64->bv_val[sc->bv_len], b64len );
 442
 443         if( salt ) ber_memfree( string.bv_val );
 444
 445         if( rc < 0 ) {
 446                 ber_bvfree( b64 );
 447                 return NULL;
 448         }
 449
 450         /* recompute length */
 451         b64->bv_len = sc->bv_len + rc;
 452         assert( strlen(b64->bv_val) == b64->bv_len );
 453         return b64;
 454 }
 455
 456 /* PASSWORD CHECK ROUTINES */
 457
 458 #ifdef LUTIL_SHA1_BYTES
 459 static int chk_ssha1(
 460         const struct berval *sc,
 461         const struct berval * passwd,
 462         const struct berval * cred )
 463 {
 464         lutil_SHA1_CTX SHA1context;
 465         unsigned char SHA1digest[LUTIL_SHA1_BYTES];
 466         int rc;
 467         unsigned char *orig_pass = NULL;
 468
 469         /* safety check */
 470         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <= sizeof(SHA1digest)) {
 471                 return -1;
 472         }
 473
 474         /* decode base64 password */
 475         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 476                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 477
 478         if( orig_pass == NULL ) return -1;
 479
 480         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 481
 482         if (rc <= sizeof(SHA1digest)) {
 483                 ber_memfree(orig_pass);
 484                 return -1;
 485         }
 486
 487         /* hash credentials with salt */
 488         lutil_SHA1Init(&SHA1context);
 489         lutil_SHA1Update(&SHA1context,
 490                 (const unsigned char *) cred->bv_val, cred->bv_len);
 491         lutil_SHA1Update(&SHA1context,
 492                 (const unsigned char *) &orig_pass[sizeof(SHA1digest)],
 493                 rc - sizeof(SHA1digest));
 494         lutil_SHA1Final(SHA1digest, &SHA1context);
 495
 496         /* compare */
 497         rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest));
 498         ber_memfree(orig_pass);
 499         return rc ? 1 : 0;
 500 }
 501
 502 static int chk_sha1(
 503         const struct berval *sc,
 504         const struct berval * passwd,
 505         const struct berval * cred )
 506 {
 507         lutil_SHA1_CTX SHA1context;
 508         unsigned char SHA1digest[LUTIL_SHA1_BYTES];
 509         int rc;
 510         unsigned char *orig_pass = NULL;
 511
 512         /* base64 un-encode password */
 513         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 514                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 515
 516         if( orig_pass == NULL ) return -1;
 517
 518         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 519
 520         if( rc != sizeof(SHA1digest) ) {
 521                 ber_memfree(orig_pass);
 522                 return -1;
 523         }
 524
 525         /* hash credentials with salt */
 526         lutil_SHA1Init(&SHA1context);
 527         lutil_SHA1Update(&SHA1context,
 528                 (const unsigned char *) cred->bv_val, cred->bv_len);
 529         lutil_SHA1Final(SHA1digest, &SHA1context);
 530
 531         /* compare */
 532         rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest));
 533         ber_memfree(orig_pass);
 534         return rc ? 1 : 0;
 535 }
 536 #endif
 537
 538 static int chk_smd5(
 539         const struct berval *sc,
 540         const struct berval * passwd,
 541         const struct berval * cred )
 542 {
 543         lutil_MD5_CTX MD5context;
 544         unsigned char MD5digest[LUTIL_MD5_BYTES];
 545         int rc;
 546         unsigned char *orig_pass = NULL;
 547
 548         /* safety check */
 549         if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <= sizeof(MD5digest)) {
 550                 return -1;
 551         }
 552
 553         /* base64 un-encode password */
 554         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 555                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 556
 557         if( orig_pass == NULL ) return -1;
 558
 559         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 560
 561         if (rc <= sizeof(MD5digest)) {
 562                 ber_memfree(orig_pass);
 563                 return -1;
 564         }
 565
 566         /* hash credentials with salt */
 567         lutil_MD5Init(&MD5context);
 568         lutil_MD5Update(&MD5context,
 569                 (const unsigned char *) cred->bv_val,
 570                 cred->bv_len );
 571         lutil_MD5Update(&MD5context,
 572                 &orig_pass[sizeof(MD5digest)],
 573                 rc - sizeof(MD5digest));
 574         lutil_MD5Final(MD5digest, &MD5context);
 575
 576         /* compare */
 577         rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest));
 578         ber_memfree(orig_pass);
 579         return rc ? 1 : 0;
 580 }
 581
 582 static int chk_md5(
 583         const struct berval *sc,
 584         const struct berval * passwd,
 585         const struct berval * cred )
 586 {
 587         lutil_MD5_CTX MD5context;
 588         unsigned char MD5digest[LUTIL_MD5_BYTES];
 589         int rc;
 590         unsigned char *orig_pass = NULL;
 591
 592         /* base64 un-encode password */
 593         orig_pass = (unsigned char *) ber_memalloc( (size_t) (
 594                 LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
 595
 596         if( orig_pass == NULL ) return -1;
 597
 598         rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
 599         if ( rc != sizeof(MD5digest) ) {
 600                 ber_memfree(orig_pass);
 601                 return -1;
 602         }
 603
 604         /* hash credentials with salt */
 605         lutil_MD5Init(&MD5context);
 606         lutil_MD5Update(&MD5context,
 607                 (const unsigned char *) cred->bv_val,
 608                 cred->bv_len );
 609         lutil_MD5Final(MD5digest, &MD5context);
 610
 611         /* compare */
 612         rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest));
 613         ber_memfree(orig_pass);
 614         return rc ? 1 : 0;
 615 }
 616
 617 #ifdef SLAPD_LMHASH
 618 static int chk_lanman(
 619         const struct berval *scheme,
 620         const struct berval *passwd,
 621         const struct berval *cred )
 622 {
 623         struct berval *hash;
 624
 625         hash = hash_lanman( scheme, cred );
 626         return memcmp( &hash->bv_val[scheme->bv_len], passwd->bv_val, 32);
 627 }
 628 #endif /* SLAPD_LMHASH */
 629
 630 #ifdef SLAPD_NS_MTA_MD5
 631 static int chk_ns_mta_md5(
 632         const struct berval *scheme,
 633         const struct berval *passwd,
 634         const struct berval *cred )
 635 {
 636         lutil_MD5_CTX MD5context;
 637         unsigned char MD5digest[LUTIL_MD5_BYTES], c;
 638         char buffer[LUTIL_MD5_BYTES + LUTIL_MD5_BYTES + 1];
 639         int i;
 640
 641         /* hash credentials with salt */
 642         lutil_MD5Init(&MD5context);
 643         lutil_MD5Update(&MD5context,
 644                 (const unsigned char *) &passwd->bv_val[32],
 645                 32 );
 646
 647         c = 0x59;
 648         lutil_MD5Update(&MD5context,
 649                 (const unsigned char *) &c,
 650                 1 );
 651
 652         lutil_MD5Update(&MD5context,
 653                 (const unsigned char *) cred->bv_val,
 654                 cred->bv_len );
 655
 656         c = 0xF7;
 657         lutil_MD5Update(&MD5context,
 658                 (const unsigned char *) &c,
 659                 1 );
 660
 661         lutil_MD5Update(&MD5context,
 662                 (const unsigned char *) &passwd->bv_val[32],
 663                 32 );
 664
 665         lutil_MD5Final(MD5digest, &MD5context);
 666
 667         for( i=0; i < sizeof( MD5digest ); i++ ) {
 668                 buffer[i+i]   = "0123456789abcdef"[(MD5digest[i]>>4) & 0x0F];
 669                 buffer[i+i+1] = "0123456789abcdef"[ MD5digest[i] & 0x0F];
 670         }
 671
 672         /* compare */
 673         return memcmp((char *)passwd->bv_val, (char *)buffer, sizeof(buffer))
 674                 ? 1 : 0;
 675 }
 676 #endif
 677
 678 #ifdef SLAPD_SPASSWD
 679 #ifdef HAVE_CYRUS_SASL
 680 sasl_conn_t *lutil_passwd_sasl_conn = NULL;
 681 #endif
 682
 683 static int chk_sasl(
 684         const struct berval *sc,
 685         const struct berval * passwd,
 686         const struct berval * cred )
 687 {
 688         unsigned int i;
 689         int rtn;
 690
 691         for( i=0; i<cred->bv_len; i++) {
 692                 if(cred->bv_val[i] == '\0') {
 693                         return 1;       /* NUL character in password */
 694                 }
 695         }
 696
 697         if( cred->bv_val[i] != '\0' ) {
 698                 return 1;       /* cred must behave like a string */
 699         }
 700
 701         for( i=0; i<passwd->bv_len; i++) {
 702                 if(passwd->bv_val[i] == '\0') {
 703                         return 1;       /* NUL character in password */
 704                 }
 705         }
 706
 707         if( passwd->bv_val[i] != '\0' ) {
 708                 return 1;       /* passwd must behave like a string */
 709         }
 710
 711         rtn = 1;
 712
 713 #ifdef HAVE_CYRUS_SASL
 714         if( lutil_passwd_sasl_conn != NULL ) {
 715                 int sc;
 716 # if SASL_VERSION_MAJOR < 2
 717                 const char *errstr = NULL;
 718                 sc = sasl_checkpass( lutil_passwd_sasl_conn,
 719                         passwd->bv_val, passwd->bv_len,
 720                         cred->bv_val, cred->bv_len,
 721                         &errstr );
 722 # else
 723                 sc = sasl_checkpass( lutil_passwd_sasl_conn,
 724                         passwd->bv_val, passwd->bv_len,
 725                         cred->bv_val, cred->bv_len );
 726 # endif
 727                 rtn = ( sc != SASL_OK );
 728         }
 729 #endif
 730
 731         return rtn;
 732 }
 733 #endif
 734
 735 #ifdef SLAPD_KPASSWD
 736 static int chk_kerberos(
 737         const struct berval *sc,
 738         const struct berval * passwd,
 739         const struct berval * cred )
 740 {
 741         unsigned int i;
 742         int rtn;
 743
 744         for( i=0; i<cred->bv_len; i++) {
 745                 if(cred->bv_val[i] == '\0') {
 746                         return 1;       /* NUL character in password */
 747                 }
 748         }
 749
 750         if( cred->bv_val[i] != '\0' ) {
 751                 return 1;       /* cred must behave like a string */
 752         }
 753
 754         for( i=0; i<passwd->bv_len; i++) {
 755                 if(passwd->bv_val[i] == '\0') {
 756                         return 1;       /* NUL character in password */
 757                 }
 758         }
 759
 760         if( passwd->bv_val[i] != '\0' ) {
 761                 return 1;       /* passwd must behave like a string */
 762         }
 763
 764         rtn = 1;
 765
 766 #ifdef HAVE_KRB5 /* HAVE_HEIMDAL_KRB5 */
 767         {
 768 /* Portions:
 769  * Copyright (c) 1997, 1998, 1999 Kungliga Tekniska H\xf6gskolan
 770  * (Royal Institute of Technology, Stockholm, Sweden).
 771  * All rights reserved.
 772  *
 773  * Redistribution and use in source and binary forms, with or without
 774  * modification, are permitted provided that the following conditions
 775  * are met:
 776  *
 777  * 1. Redistributions of source code must retain the above copyright
 778  *    notice, this list of conditions and the following disclaimer.
 779  *
 780  * 2. Redistributions in binary form must reproduce the above copyright
 781  *    notice, this list of conditions and the following disclaimer in the
 782  *    documentation and/or other materials provided with the distribution.
 783  *
 784  * 3. Neither the name of the Institute nor the names of its contributors
 785  *    may be used to endorse or promote products derived from this software
 786  *    without specific prior written permission.
 787  *
 788  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 789  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 790  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 791  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 792  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 793  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 794  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 795  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 796  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 797  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 798  * SUCH DAMAGE.
 799  */
 800
 801                 krb5_context context;
 802                 krb5_error_code ret;
 803                 krb5_creds creds;
 804                 krb5_get_init_creds_opt get_options;
 805                 krb5_verify_init_creds_opt verify_options;
 806                 krb5_principal client, server;
 807 #ifdef notdef
 808                 krb5_preauthtype pre_auth_types[] = {KRB5_PADATA_ENC_TIMESTAMP};
 809 #endif
 810
 811                 ret = krb5_init_context( &context );
 812                 if (ret) {
 813                         return 1;
 814                 }
 815
 816 #ifdef notdef
 817                 krb5_get_init_creds_opt_set_preauth_list(&get_options,
 818                         pre_auth_types, 1);
 819 #endif
 820
 821                 krb5_get_init_creds_opt_init( &get_options );
 822
 823                 krb5_verify_init_creds_opt_init( &verify_options );
 824
 825                 ret = krb5_parse_name( context, passwd->bv_val, &client );
 826
 827                 if (ret) {
 828                         krb5_free_context( context );
 829                         return 1;
 830                 }
 831
 832                 ret = krb5_get_init_creds_password( context,
 833                         &creds, client, cred->bv_val, NULL,
 834                         NULL, 0, NULL, &get_options );
 835
 836                 if (ret) {
 837                         krb5_free_principal( context, client );
 838                         krb5_free_context( context );
 839                         return 1;
 840                 }
 841
 842                 {
 843                         char *host = ldap_pvt_get_fqdn( NULL );
 844
 845                         if( host == NULL ) {
 846                                 krb5_free_principal( context, client );
 847                                 krb5_free_context( context );
 848                                 return 1;
 849                         }
 850
 851                         ret = krb5_sname_to_principal( context,
 852                                 host, "ldap", KRB5_NT_SRV_HST, &server );
 853
 854                         ber_memfree( host );
 855                 }
 856
 857                 if (ret) {
 858                         krb5_free_principal( context, client );
 859                         krb5_free_context( context );
 860                         return 1;
 861                 }
 862
 863                 ret = krb5_verify_init_creds( context,
 864                         &creds, server, NULL, NULL, &verify_options );
 865
 866                 krb5_free_principal( context, client );
 867                 krb5_free_principal( context, server );
 868                 krb5_free_cred_contents( context, &creds );
 869                 krb5_free_context( context );
 870
 871                 rtn = !!ret;
 872         }
 873 #elif   defined(HAVE_KRB4)
 874         {
 875                 /* Borrowed from Heimdal kpopper */
 876 /* Portions:
 877  * Copyright (c) 1989 Regents of the University of California.
 878  * All rights reserved.  The Berkeley software License Agreement
 879  * specifies the terms and conditions for redistribution.
 880  */
 881
 882                 int status;
 883                 char lrealm[REALM_SZ];
 884                 char tkt[MAXHOSTNAMELEN];
 885
 886                 status = krb_get_lrealm(lrealm,1);
 887                 if (status == KFAILURE) {
 888                         return 1;
 889                 }
 890
 891                 snprintf(tkt, sizeof(tkt), "%s_slapd.%u",
 892                         TKT_ROOT, (unsigned)getpid());
 893                 krb_set_tkt_string (tkt);
 894
 895                 status = krb_verify_user( passwd->bv_val, "", lrealm,
 896                         cred->bv_val, 1, "ldap");
 897
 898                 dest_tkt(); /* no point in keeping the tickets */
 899
 900                 return status == KFAILURE;
 901         }
 902 #endif
 903
 904         return rtn;
 905 }
 906 #endif /* SLAPD_KPASSWD */
 907
 908 #ifdef SLAPD_CRYPT
 909 static int chk_crypt(
 910         const struct berval *sc,
 911         const struct berval * passwd,
 912         const struct berval * cred )
 913 {
 914         char *cr;
 915         unsigned int i;
 916
 917         for( i=0; i<cred->bv_len; i++) {
 918                 if(cred->bv_val[i] == '\0') {
 919                         return 1;       /* NUL character in password */
 920                 }
 921         }
 922
 923         if( cred->bv_val[i] != '\0' ) {
 924                 return -1;      /* cred must behave like a string */
 925         }
 926
 927         if( passwd->bv_len < 2 ) {
 928                 return -1;      /* passwd must be at least two characters long */
 929         }
 930
 931         for( i=0; i<passwd->bv_len; i++) {
 932                 if(passwd->bv_val[i] == '\0') {
 933                         return -1;      /* NUL character in password */
 934                 }
 935         }
 936
 937         if( passwd->bv_val[i] != '\0' ) {
 938                 return -1;      /* passwd must behave like a string */
 939         }
 940
 941         cr = crypt( cred->bv_val, passwd->bv_val );
 942
 943         if( cr == NULL || cr[0] == '\0' ) {
 944                 /* salt must have been invalid */
 945                 return -1;
 946         }
 947
 948         return strcmp( passwd->bv_val, cr ) ? 1 : 0;
 949 }
 950
 951 # if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
 952 static int chk_unix(
 953         const struct berval *sc,
 954         const struct berval * passwd,
 955         const struct berval * cred )
 956 {
 957         unsigned int i;
 958         char *pw,*cr;
 959
 960         for( i=0; i<cred->bv_len; i++) {
 961                 if(cred->bv_val[i] == '\0') {
 962                         return -1;      /* NUL character in password */
 963                 }
 964         }
 965         if( cred->bv_val[i] != '\0' ) {
 966                 return -1;      /* cred must behave like a string */
 967         }
 968
 969         for( i=0; i<passwd->bv_len; i++) {
 970                 if(passwd->bv_val[i] == '\0') {
 971                         return -1;      /* NUL character in password */
 972                 }
 973         }
 974
 975         if( passwd->bv_val[i] != '\0' ) {
 976                 return -1;      /* passwd must behave like a string */
 977         }
 978
 979         {
 980                 struct passwd *pwd = getpwnam(passwd->bv_val);
 981
 982                 if(pwd == NULL) {
 983                         return -1;      /* not found */
 984                 }
 985
 986                 pw = pwd->pw_passwd;
 987         }
 988 #  ifdef HAVE_GETSPNAM
 989         {
 990                 struct spwd *spwd = getspnam(passwd->bv_val);
 991
 992                 if(spwd != NULL) {
 993                         pw = spwd->sp_pwdp;
 994                 }
 995         }
 996 #  endif
 997 #  ifdef HAVE_AIX_SECURITY
 998         {
 999                 struct userpw *upw = getuserpw(passwd->bv_val);
1000
1001                 if (upw != NULL) {
1002                         pw = upw->upw_passwd;
1003                 }
1004         }
1005 #  endif
1006
1007         if( pw == NULL || pw[0] == '\0' || pw[1] == '\0' ) {
1008                 /* password must must be at least two characters long */
1009                 return -1;
1010         }
1011
1012         cr = crypt(cred->bv_val, pw);
1013
1014         if( cr == NULL || cr[0] == '\0' ) {
1015                 /* salt must have been invalid */
1016                 return -1;
1017         }
1018
1019         return strcmp(pw, cr) ? 1 : 0;
1020
1021 }
1022 # endif
1023 #endif
1024
1025 /* PASSWORD GENERATION ROUTINES */
1026
1027 #ifdef LUTIL_SHA1_BYTES
1028 static struct berval *hash_ssha1(
1029         const struct berval *scheme,
1030         const struct berval  *passwd )
1031 {
1032         lutil_SHA1_CTX  SHA1context;
1033         unsigned char   SHA1digest[LUTIL_SHA1_BYTES];
1034         unsigned char   saltdata[4];
1035         struct berval digest;
1036         struct berval salt;
1037
1038         digest.bv_val = SHA1digest;
1039         digest.bv_len = sizeof(SHA1digest);
1040         salt.bv_val = saltdata;
1041         salt.bv_len = sizeof(saltdata);
1042
1043         if( lutil_entropy( salt.bv_val, salt.bv_len) < 0 ) {
1044                 return NULL;
1045         }
1046
1047         lutil_SHA1Init( &SHA1context );
1048         lutil_SHA1Update( &SHA1context,
1049                 (const unsigned char *)passwd->bv_val, passwd->bv_len );
1050         lutil_SHA1Update( &SHA1context,
1051                 (const unsigned char *)salt.bv_val, salt.bv_len );
1052         lutil_SHA1Final( SHA1digest, &SHA1context );
1053
1054         return pw_string64( scheme, &digest, &salt);
1055 }
1056
1057 static struct berval *hash_sha1(
1058         const struct berval *scheme,
1059         const struct berval  *passwd )
1060 {
1061         lutil_SHA1_CTX  SHA1context;
1062         unsigned char   SHA1digest[LUTIL_SHA1_BYTES];
1063         struct berval digest;
1064         digest.bv_val = SHA1digest;
1065         digest.bv_len = sizeof(SHA1digest);
1066
1067         lutil_SHA1Init( &SHA1context );
1068         lutil_SHA1Update( &SHA1context,
1069                 (const unsigned char *)passwd->bv_val, passwd->bv_len );
1070         lutil_SHA1Final( SHA1digest, &SHA1context );
1071
1072         return pw_string64( scheme, &digest, NULL);
1073 }
1074 #endif
1075
1076 static struct berval *hash_smd5(
1077         const struct berval *scheme,
1078         const struct berval  *passwd )
1079 {
1080         lutil_MD5_CTX   MD5context;
1081         unsigned char   MD5digest[LUTIL_MD5_BYTES];
1082         unsigned char   saltdata[4];
1083         struct berval digest;
1084         struct berval salt;
1085
1086         digest.bv_val = MD5digest;
1087         digest.bv_len = sizeof(MD5digest);
1088         salt.bv_val = saltdata;
1089         salt.bv_len = sizeof(saltdata);
1090
1091         if( lutil_entropy( salt.bv_val, salt.bv_len) < 0 ) {
1092                 return NULL;
1093         }
1094
1095         lutil_MD5Init( &MD5context );
1096         lutil_MD5Update( &MD5context,
1097                 (const unsigned char *) passwd->bv_val, passwd->bv_len );
1098         lutil_MD5Update( &MD5context,
1099                 (const unsigned char *) salt.bv_val, salt.bv_len );
1100         lutil_MD5Final( MD5digest, &MD5context );
1101
1102         return pw_string64( scheme, &digest, &salt );
1103 }
1104
1105 static struct berval *hash_md5(
1106         const struct berval *scheme,
1107         const struct berval  *passwd )
1108 {
1109         lutil_MD5_CTX   MD5context;
1110         unsigned char   MD5digest[LUTIL_MD5_BYTES];
1111
1112         struct berval digest;
1113
1114         digest.bv_val = MD5digest;
1115         digest.bv_len = sizeof(MD5digest);
1116
1117         lutil_MD5Init( &MD5context );
1118         lutil_MD5Update( &MD5context,
1119                 (const unsigned char *) passwd->bv_val, passwd->bv_len );
1120         lutil_MD5Final( MD5digest, &MD5context );
1121
1122         return pw_string64( scheme, &digest, NULL );
1123 ;
1124 }
1125
1126 #ifdef SLAPD_LMHASH
1127 /* pseudocode from RFC2433
1128  * A.2 LmPasswordHash()
1129  *
1130  *    LmPasswordHash(
1131  *    IN  0-to-14-oem-char Password,
1132  *    OUT 16-octet         PasswordHash )
1133  *    {
1134  *       Set UcasePassword to the uppercased Password
1135  *       Zero pad UcasePassword to 14 characters
1136  *
1137  *       DesHash( 1st 7-octets of UcasePassword,
1138  *                giving 1st 8-octets of PasswordHash )
1139  *
1140  *       DesHash( 2nd 7-octets of UcasePassword,
1141  *                giving 2nd 8-octets of PasswordHash )
1142  *    }
1143  *
1144  *
1145  * A.3 DesHash()
1146  *
1147  *    DesHash(
1148  *    IN  7-octet Clear,
1149  *    OUT 8-octet Cypher )
1150  *    {
1151  *        *
1152  *        * Make Cypher an irreversibly encrypted form of Clear by
1153  *        * encrypting known text using Clear as the secret key.
1154  *        * The known text consists of the string
1155  *        *
1156  *        *              KGS!@#$%
1157  *        *
1158  *
1159  *       Set StdText to "KGS!@#$%"
1160  *       DesEncrypt( StdText, Clear, giving Cypher )
1161  *    }
1162  *
1163  *
1164  * A.4 DesEncrypt()
1165  *
1166  *    DesEncrypt(
1167  *    IN  8-octet Clear,
1168  *    IN  7-octet Key,
1169  *    OUT 8-octet Cypher )
1170  *    {
1171  *        *
1172  *        * Use the DES encryption algorithm [4] in ECB mode [9]
1173  *        * to encrypt Clear into Cypher such that Cypher can
1174  *        * only be decrypted back to Clear by providing Key.
1175  *        * Note that the DES algorithm takes as input a 64-bit
1176  *        * stream where the 8th, 16th, 24th, etc.  bits are
1177  *        * parity bits ignored by the encrypting algorithm.
1178  *        * Unless you write your own DES to accept 56-bit input
1179  *        * without parity, you will need to insert the parity bits
1180  *        * yourself.
1181  *        *
1182  *    }
1183  */
1184
1185 static void lmPasswd_to_key(
1186         const unsigned char *lmPasswd,
1187         des_cblock *key)
1188 {
1189         /* make room for parity bits */
1190         ((char *)key)[0] = lmPasswd[0];
1191         ((char *)key)[1] = ((lmPasswd[0]&0x01)<<7) | (lmPasswd[1]>>1);
1192         ((char *)key)[2] = ((lmPasswd[1]&0x03)<<6) | (lmPasswd[2]>>2);
1193         ((char *)key)[3] = ((lmPasswd[2]&0x07)<<5) | (lmPasswd[3]>>3);
1194         ((char *)key)[4] = ((lmPasswd[3]&0x0F)<<4) | (lmPasswd[4]>>4);
1195         ((char *)key)[5] = ((lmPasswd[4]&0x1F)<<3) | (lmPasswd[5]>>5);
1196         ((char *)key)[6] = ((lmPasswd[5]&0x3F)<<2) | (lmPasswd[6]>>6);
1197         ((char *)key)[7] = ((lmPasswd[6]&0x7F)<<1);
1198
1199         des_set_odd_parity( key );
1200 }
1201
1202 static struct berval *hash_lanman(
1203         const struct berval *scheme,
1204         const struct berval *passwd )
1205 {
1206
1207         int i;
1208         char UcasePassword[15];
1209         des_cblock key;
1210         des_key_schedule schedule;
1211         des_cblock StdText = "KGS!@#$%";
1212         des_cblock hash1, hash2;
1213         char lmhash[33];
1214         struct berval hash;
1215
1216         for( i=0; i<passwd->bv_len; i++) {
1217                 if(passwd->bv_val[i] == '\0') {
1218                         return NULL;    /* NUL character in password */
1219                 }
1220         }
1221
1222         if( passwd->bv_val[i] != '\0' ) {
1223                 return NULL;    /* passwd must behave like a string */
1224         }
1225
1226         strncpy( UcasePassword, passwd->bv_val, 14 );
1227         UcasePassword[14] = '\0';
1228         ldap_pvt_str2upper( UcasePassword );
1229
1230         lmPasswd_to_key( UcasePassword, &key );
1231         des_set_key_unchecked( &key, schedule );
1232         des_ecb_encrypt( &StdText, &hash1, schedule , DES_ENCRYPT );
1233
1234         lmPasswd_to_key( &UcasePassword[7], &key );
1235         des_set_key_unchecked( &key, schedule );
1236         des_ecb_encrypt( &StdText, &hash2, schedule , DES_ENCRYPT );
1237
1238         sprintf( lmhash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
1239                 hash1[0],hash1[1],hash1[2],hash1[3],hash1[4],hash1[5],hash1[6],hash1[7],
1240                 hash2[0],hash2[1],hash2[2],hash2[3],hash2[4],hash2[5],hash2[6],hash2[7] );
1241
1242         hash.bv_val = lmhash;
1243         hash.bv_len = 32;
1244
1245         return pw_string( scheme, &hash );
1246 }
1247 #endif /* SLAPD_LMHASH */
1248
1249 #ifdef SLAPD_CRYPT
1250 static struct berval *hash_crypt(
1251         const struct berval *scheme,
1252         const struct berval *passwd )
1253 {
1254         struct berval hash;
1255         unsigned char salt[32]; /* salt suitable for most anything */
1256         unsigned int i;
1257
1258         for( i=0; i<passwd->bv_len; i++) {
1259                 if(passwd->bv_val[i] == '\0') {
1260                         return NULL;    /* NUL character in password */
1261                 }
1262         }
1263
1264         if( passwd->bv_val[i] != '\0' ) {
1265                 return NULL;    /* passwd must behave like a string */
1266         }
1267
1268         if( lutil_entropy( salt, sizeof( salt ) ) < 0 ) {
1269                 return NULL;
1270         }
1271
1272         for( i=0; i< ( sizeof(salt) - 1 ); i++ ) {
1273                 salt[i] = crypt64[ salt[i] % (sizeof(crypt64)-1) ];
1274         }
1275         salt[sizeof( salt ) - 1 ] = '\0';
1276
1277         if( salt_format != NULL ) {
1278                 /* copy the salt we made into entropy before snprintfing
1279                    it back into the salt */
1280                 char entropy[sizeof(salt)];
1281                 strcpy( entropy, salt );
1282                 snprintf( salt, sizeof(entropy), salt_format, entropy );
1283         }
1284
1285         hash.bv_val = crypt( passwd->bv_val, salt );
1286
1287         if( hash.bv_val == NULL ) return NULL;
1288
1289         hash.bv_len = strlen( hash.bv_val );
1290
1291         if( hash.bv_len == 0 ) {
1292                 return NULL;
1293         }
1294
1295         return pw_string( scheme, &hash );
1296 }
1297 #endif
1298
1299 int lutil_salt_format(const char *format)
1300 {
1301 #ifdef SLAPD_CRYPT
1302         free( salt_format );
1303
1304         salt_format = format != NULL ? strdup( format ) : NULL;
1305 #endif
1306
1307         return 0;
1308 }
1309
1310 #ifdef SLAPD_CLEARTEXT
1311 static struct berval *hash_clear(
1312         const struct berval *scheme,
1313         const struct berval  *passwd )
1314 {
1315         return ber_bvdup( (struct berval *) passwd );
1316 }
1317 #endif
1318