1 /* aclparse.c - routines to parse and check acl's */
4 * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
5 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
14 #include <ac/socket.h>
15 #include <ac/string.h>
16 #include <ac/unistd.h>
20 static void split(char *line, int splitchar, char **left, char **right);
21 static void access_append(Access **l, Access *a);
22 static void acl_usage(void) LDAP_GCCATTR((noreturn));
25 static void print_acl(Backend *be, AccessControl *a);
26 static void print_access(Access *b);
30 regtest(const char *fname, int lineno, char *pat) {
46 for (size = 0, flag = 0; (size < sizeof(buf)) && *sp; sp++) {
48 if (*sp == '$'|| (*sp >= '0' && *sp <= '9')) {
65 if ( size >= (sizeof(buf)-1) ) {
67 "%s: line %d: regular expression \"%s\" too large\n",
72 if ((e = regcomp(&re, buf, REG_EXTENDED|REG_ICASE))) {
74 regerror(e, &re, error, sizeof(error));
76 "%s: line %d: regular expression \"%s\" bad because of %s\n",
77 fname, lineno, pat, error );
102 for ( i = 1; i < argc; i++ ) {
103 /* to clause - select which entries are protected */
104 if ( strcasecmp( argv[i], "to" ) == 0 ) {
107 "%s: line %d: only one to clause allowed in access line\n",
111 a = (AccessControl *) ch_calloc( 1, sizeof(AccessControl) );
112 a->acl_filter = NULL;
113 a->acl_dn_pat = NULL;
115 a->acl_access = NULL;
117 for ( ++i; i < argc; i++ ) {
118 if ( strcasecmp( argv[i], "by" ) == 0 ) {
123 if ( strcasecmp( argv[i], "*" ) == 0 ) {
124 if( a->acl_dn_pat != NULL ) {
126 "%s: line %d: dn pattern"
127 " already specified in to clause.\n",
132 a->acl_dn_pat = ch_strdup( "*" );
136 split( argv[i], '=', &left, &right );
138 if ( strcasecmp( left, "dn" ) == 0 ) {
139 if( a->acl_dn_pat != NULL ) {
141 "%s: line %d: dn pattern"
142 " already specified in to clause.\n",
147 if ( right == NULL ) {
149 "%s: line %d: missing \"=\" in \"%s\" in to clause\n",
150 fname, lineno, left );
154 if( *right == '\0' ) {
155 a->acl_dn_pat = ch_strdup("anonymous");
157 } else if ( strcmp(right, "*") == 0
158 || strcmp(right, ".*") == 0
159 || strcmp(right, ".*$") == 0
160 || strcmp(right, "^.*") == 0
161 || strcmp(right, "^.*$$") == 0
162 || strcmp(right, ".*$$") == 0
163 || strcmp(right, "^.*$$") == 0 )
165 a->acl_dn_pat = ch_strdup( "*" );
168 a->acl_dn_pat = ch_strdup( right );
174 if ( right == NULL || *right == '\0' ) {
176 "%s: line %d: missing \"=\" in (or value after) \"%s\" in to clause\n",
177 fname, lineno, left );
181 if ( strcasecmp( left, "filter" ) == 0 ) {
182 if ( (a->acl_filter = str2filter(
185 "%s: line %d: bad filter \"%s\" in to clause\n",
186 fname, lineno, right );
190 } else if ( strncasecmp( left, "attr", 4 ) == 0 ) {
193 alist = str2charray( right, "," );
194 charray_merge( &a->acl_attrs, alist );
195 charray_free( alist );
199 "%s: line %d: expecting <what> got \"%s\"\n",
200 fname, lineno, left );
205 if ( a->acl_dn_pat != NULL && strcmp(a->acl_dn_pat, "*") == 0) {
206 free( a->acl_dn_pat );
207 a->acl_dn_pat = NULL;
210 if( a->acl_dn_pat != NULL ) {
211 int e = regcomp( &a->acl_dn_re, a->acl_dn_pat,
212 REG_EXTENDED | REG_ICASE );
215 regerror( e, &a->acl_dn_re, buf, sizeof(buf) );
217 "%s: line %d: regular expression \"%s\" bad because of %s\n",
218 fname, lineno, right, buf );
223 /* by clause - select who has what access to entries */
224 } else if ( strcasecmp( argv[i], "by" ) == 0 ) {
227 "%s: line %d: to clause required before by clause in access line\n",
233 * by clause consists of <who> and <access>
236 b = (Access *) ch_calloc( 1, sizeof(Access) );
238 ACL_INVALIDATE( b->a_mask );
242 "%s: line %d: premature eol: expecting <who>\n",
248 for ( ; i < argc; i++ ) {
250 split( argv[i], '=', &left, &right );
252 if ( strcasecmp( argv[i], "*" ) == 0 ) {
253 pat = ch_strdup( "*" );
255 } else if ( strcasecmp( argv[i], "anonymous" ) == 0 ) {
256 pat = ch_strdup( "anonymous" );
258 } else if ( strcasecmp( argv[i], "self" ) == 0 ) {
259 pat = ch_strdup( "self" );
261 } else if ( strcasecmp( argv[i], "users" ) == 0 ) {
262 pat = ch_strdup( "users" );
264 } else if ( strcasecmp( left, "dn" ) == 0 ) {
265 if( right == NULL ) {
267 pat = ch_strdup( "users" );
269 } else if (*right == '\0' ) {
271 pat = ch_strdup( "anonymous" );
273 } else if ( strcmp( right, "*" ) == 0 ) {
275 /* any or users? users for now */
276 pat = ch_strdup( "users" );
278 } else if ( strcmp( right, ".+" ) == 0
279 || strcmp( right, "^.+" ) == 0
280 || strcmp( right, ".+$" ) == 0
281 || strcmp( right, "^.+$" ) == 0
282 || strcmp( right, ".+$$" ) == 0
283 || strcmp( right, "^.+$$" ) == 0 )
285 pat = ch_strdup( "users" );
287 } else if ( strcmp( right, ".*" ) == 0
288 || strcmp( right, "^.*" ) == 0
289 || strcmp( right, ".*$" ) == 0
290 || strcmp( right, "^.*$" ) == 0
291 || strcmp( right, ".*$$" ) == 0
292 || strcmp( right, "^.*$$" ) == 0 )
294 pat = ch_strdup( "*" );
297 regtest(fname, lineno, right);
298 pat = ch_strdup( right );
306 if( b->a_dn_pat != NULL ) {
308 "%s: line %d: dn pattern already specified.\n",
317 if ( strcasecmp( left, "dnattr" ) == 0 ) {
318 if( b->a_dn_at != NULL ) {
320 "%s: line %d: dnattr already specified.\n",
325 rc = slap_str2ad( right, &b->a_dn_at, &text );
327 if( rc != LDAP_SUCCESS ) {
329 "%s: line %d: dnattr \"%s\": %s\n",
330 fname, lineno, right, text );
335 if( !is_at_syntax( b->a_dn_at->ad_type,
339 "%s: line %d: dnattr \"%s\": "
340 "inappropriate syntax: %s\n",
341 fname, lineno, right,
342 b->a_dn_at->ad_type->sat_syntax_oid );
349 if ( strncasecmp( left, "group", sizeof("group")-1 ) == 0 ) {
353 if( b->a_group_pat != NULL ) {
355 "%s: line %d: group pattern already specified.\n",
360 /* format of string is "group/objectClassValue/groupAttrName" */
361 if ((value = strchr(left, '/')) != NULL) {
364 && (name = strchr(value, '/')) != NULL)
370 regtest(fname, lineno, right);
371 b->a_group_pat = ch_strdup( right );
373 if (value && *value) {
374 b->a_group_oc = oc_find( value );
377 if( b->a_group_oc == NULL ) {
379 "%s: line %d: group objectclass "
381 fname, lineno, value );
385 b->a_group_oc = oc_find(SLAPD_GROUP_CLASS);
387 if( b->a_group_oc == NULL ) {
389 "%s: line %d: group default objectclass "
391 fname, lineno, SLAPD_GROUP_CLASS );
397 if( is_object_subclass( b->a_group_oc,
398 slap_schema.si_oc_referral ) )
401 "%s: line %d: group objectclass \"%s\" "
402 "is subclass of referral\n",
403 fname, lineno, value );
407 if( is_object_subclass( b->a_group_oc,
408 slap_schema.si_oc_alias ) )
411 "%s: line %d: group objectclass \"%s\" "
412 "is subclass of alias\n",
413 fname, lineno, value );
419 rc = slap_str2ad( right, &b->a_group_at, &text );
421 if( rc != LDAP_SUCCESS ) {
423 "%s: line %d: group \"%s\": %s\n",
424 fname, lineno, right, text );
429 rc = slap_str2ad( SLAPD_GROUP_ATTR, &b->a_group_at, &text );
431 if( rc != LDAP_SUCCESS ) {
433 "%s: line %d: group \"%s\": %s\n",
434 fname, lineno, SLAPD_GROUP_ATTR, text );
439 if( !is_at_syntax( b->a_group_at->ad_type,
443 "%s: line %d: group \"%s\": inappropriate syntax: %s\n",
444 fname, lineno, right,
445 b->a_group_at->ad_type->sat_syntax_oid );
453 struct berval *vals[2];
455 val.bv_val = b->a_group_oc->soc_oid;
456 val.bv_len = strlen(val.bv_val);
461 rc = oc_check_allowed( b->a_group_at->ad_type, vals );
465 "%s: line %d: group: \"%s\" not allowed by \"%s\"\n",
467 b->a_group_at->ad_type,
468 b->a_group_oc->soc_oid );
475 if ( strcasecmp( left, "peername" ) == 0 ) {
476 if( b->a_peername_pat != NULL ) {
478 "%s: line %d: peername pattern already specified.\n",
483 regtest(fname, lineno, right);
484 b->a_peername_pat = ch_strdup( right );
488 if ( strcasecmp( left, "sockname" ) == 0 ) {
489 if( b->a_sockname_pat != NULL ) {
491 "%s: line %d: sockname pattern already specified.\n",
496 regtest(fname, lineno, right);
497 b->a_sockname_pat = ch_strdup( right );
501 if ( strcasecmp( left, "domain" ) == 0 ) {
502 if( b->a_domain_pat != NULL ) {
504 "%s: line %d: domain pattern already specified.\n",
509 regtest(fname, lineno, right);
510 b->a_domain_pat = ch_strdup( right );
514 if ( strcasecmp( left, "sockurl" ) == 0 ) {
515 if( b->a_sockurl_pat != NULL ) {
517 "%s: line %d: sockurl pattern already specified.\n",
522 regtest(fname, lineno, right);
523 b->a_sockurl_pat = ch_strdup( right );
527 #ifdef SLAPD_ACI_ENABLED
528 if ( strcasecmp( left, "aci" ) == 0 ) {
529 if( b->a_aci_at != NULL ) {
531 "%s: line %d: aci attribute already specified.\n",
536 if ( right != NULL && *right != '\0' ) {
537 rc = slap_str2ad( right, &b->a_aci_at, &text );
539 if( rc != LDAP_SUCCESS ) {
541 "%s: line %d: aci \"%s\": %s\n",
542 fname, lineno, right, text );
547 rc = slap_str2ad( SLAPD_ACI_ATTR, &b->a_aci_at, &text );
549 if( rc != LDAP_SUCCESS ) {
551 "%s: line %d: aci \"%s\": %s\n",
552 fname, lineno, SLAPD_ACI_ATTR, text );
557 if( !is_at_syntax( b->a_aci_at->ad_type,
561 "%s: line %d: aci \"%s\": inappropriate syntax: %s\n",
562 fname, lineno, right,
563 b->a_aci_at->ad_type->sat_syntax_oid );
569 #endif /* SLAPD_ACI_ENABLED */
571 if( right != NULL ) {
578 if( i == argc || ( strcasecmp( left, "stop" ) == 0 )) {
579 /* out of arguments or plain stop */
581 ACL_PRIV_ASSIGN(b->a_mask, ACL_PRIV_ADDITIVE);
582 b->a_type = ACL_STOP;
584 access_append( &a->acl_access, b );
588 if( strcasecmp( left, "continue" ) == 0 ) {
591 ACL_PRIV_ASSIGN(b->a_mask, ACL_PRIV_ADDITIVE);
592 b->a_type = ACL_CONTINUE;
594 access_append( &a->acl_access, b );
598 if( strcasecmp( left, "break" ) == 0 ) {
601 ACL_PRIV_ASSIGN(b->a_mask, ACL_PRIV_ADDITIVE);
602 b->a_type = ACL_BREAK;
604 access_append( &a->acl_access, b );
608 if ( strcasecmp( left, "by" ) == 0 ) {
609 /* we've gone too far */
611 ACL_PRIV_ASSIGN(b->a_mask, ACL_PRIV_ADDITIVE);
612 b->a_type = ACL_STOP;
614 access_append( &a->acl_access, b );
619 if( strncasecmp( left, "self", 4 ) == 0 ) {
621 ACL_PRIV_ASSIGN( b->a_mask, str2accessmask( &left[4] ) );
624 ACL_PRIV_ASSIGN( b->a_mask, str2accessmask( left ) );
627 if( ACL_IS_INVALID( b->a_mask ) ) {
629 "%s: line %d: expecting <access> got \"%s\"\n",
630 fname, lineno, left );
634 b->a_type = ACL_STOP;
637 /* out of arguments or plain stop */
638 access_append( &a->acl_access, b );
642 if( strcasecmp( argv[i], "continue" ) == 0 ) {
644 b->a_type = ACL_CONTINUE;
646 } else if( strcasecmp( argv[i], "break" ) == 0 ) {
648 b->a_type = ACL_BREAK;
650 } else if ( strcasecmp( argv[i], "stop" ) != 0 ) {
655 access_append( &a->acl_access, b );
659 "%s: line %d: expecting \"to\" or \"by\" got \"%s\"\n",
660 fname, lineno, argv[i] );
665 /* if we have no real access clause, complain and do nothing */
668 "%s: line %d: warning: no access clause(s) specified in access line\n",
673 if (ldap_debug & LDAP_DEBUG_ACL)
677 if ( a->acl_access == NULL ) {
679 "%s: line %d: warning: no by clause(s) specified in access line\n",
684 acl_append( &be->be_acl, a );
686 acl_append( &global_acl, a );
692 accessmask2str( slap_access_mask_t mask, char *buf )
696 assert( buf != NULL );
698 if ( ACL_IS_INVALID( mask ) ) {
704 if ( ACL_IS_LEVEL( mask ) ) {
705 if ( ACL_LVL_IS_NONE(mask) ) {
706 strcat( buf, "none" );
708 } else if ( ACL_LVL_IS_AUTH(mask) ) {
709 strcat( buf, "auth" );
711 } else if ( ACL_LVL_IS_COMPARE(mask) ) {
712 strcat( buf, "compare" );
714 } else if ( ACL_LVL_IS_SEARCH(mask) ) {
715 strcat( buf, "search" );
717 } else if ( ACL_LVL_IS_READ(mask) ) {
718 strcat( buf, "read" );
720 } else if ( ACL_LVL_IS_WRITE(mask) ) {
721 strcat( buf, "write" );
723 strcat( buf, "unknown" );
729 if( ACL_IS_ADDITIVE( mask ) ) {
732 } else if( ACL_IS_SUBTRACTIVE( mask ) ) {
739 if ( ACL_PRIV_ISSET(mask, ACL_PRIV_WRITE) ) {
744 if ( ACL_PRIV_ISSET(mask, ACL_PRIV_READ) ) {
749 if ( ACL_PRIV_ISSET(mask, ACL_PRIV_SEARCH) ) {
754 if ( ACL_PRIV_ISSET(mask, ACL_PRIV_COMPARE) ) {
759 if ( ACL_PRIV_ISSET(mask, ACL_PRIV_AUTH) ) {
764 if ( none && ACL_PRIV_ISSET(mask, ACL_PRIV_NONE) ) {
773 if ( ACL_IS_LEVEL( mask ) ) {
780 str2accessmask( const char *str )
782 slap_access_mask_t mask;
784 if( !isalpha(str[0]) ) {
787 if ( str[0] == '=' ) {
790 } else if( str[0] == '+' ) {
791 ACL_PRIV_ASSIGN(mask, ACL_PRIV_ADDITIVE);
793 } else if( str[0] == '-' ) {
794 ACL_PRIV_ASSIGN(mask, ACL_PRIV_SUBSTRACTIVE);
797 ACL_INVALIDATE(mask);
801 for( i=1; str[i] != '\0'; i++ ) {
802 if( TOLOWER(str[i]) == 'w' ) {
803 ACL_PRIV_SET(mask, ACL_PRIV_WRITE);
805 } else if( TOLOWER(str[i]) == 'r' ) {
806 ACL_PRIV_SET(mask, ACL_PRIV_READ);
808 } else if( TOLOWER(str[i]) == 's' ) {
809 ACL_PRIV_SET(mask, ACL_PRIV_SEARCH);
811 } else if( TOLOWER(str[i]) == 'c' ) {
812 ACL_PRIV_SET(mask, ACL_PRIV_COMPARE);
814 } else if( TOLOWER(str[i]) == 'x' ) {
815 ACL_PRIV_SET(mask, ACL_PRIV_AUTH);
817 } else if( str[i] != '0' ) {
818 ACL_INVALIDATE(mask);
826 if ( strcasecmp( str, "none" ) == 0 ) {
827 ACL_LVL_ASSIGN_NONE(mask);
829 } else if ( strcasecmp( str, "auth" ) == 0 ) {
830 ACL_LVL_ASSIGN_AUTH(mask);
832 } else if ( strcasecmp( str, "compare" ) == 0 ) {
833 ACL_LVL_ASSIGN_COMPARE(mask);
835 } else if ( strcasecmp( str, "search" ) == 0 ) {
836 ACL_LVL_ASSIGN_SEARCH(mask);
838 } else if ( strcasecmp( str, "read" ) == 0 ) {
839 ACL_LVL_ASSIGN_READ(mask);
841 } else if ( strcasecmp( str, "write" ) == 0 ) {
842 ACL_LVL_ASSIGN_WRITE(mask);
845 ACL_INVALIDATE( mask );
854 fprintf( stderr, "\n"
855 "<access clause> ::= access to <what> "
856 "[ by <who> <access> <control> ]+ \n"
857 "<what> ::= * | [dn=<regex>] [filter=<ldapfilter>] [attrs=<attrlist>]\n"
858 "<attrlist> ::= <attr> | <attr> , <attrlist>\n"
859 "<attr> ::= <attrname> | entry | children\n"
860 "<who> ::= [ * | anonymous | users | self | dn=<regex> ]\n"
861 "\t[dnattr=<attrname>]\n"
862 "\t[group[/<objectclass>[/<attrname>]]=<regex>]\n"
863 "\t[peername=<regex>] [sockname=<regex>]\n"
864 "\t[domain=<regex>] [sockurl=<regex>]\n"
865 #ifdef SLAPD_ACI_ENABLED
866 "\t[aci=<attrname>]\n"
868 "<access> ::= [self]{<level>|<priv>}\n"
869 "<level> ::= none | auth | compare | search | read | write\n"
870 "<priv> ::= {=|+|-}{w|r|s|c|x}+\n"
871 "<control> ::= [ stop | continue | break ]\n"
873 exit( EXIT_FAILURE );
885 if ( (*right = strchr( line, splitchar )) != NULL ) {
886 *((*right)++) = '\0';
891 access_append( Access **l, Access *a )
893 for ( ; *l != NULL; l = &(*l)->a_next )
900 acl_append( AccessControl **l, AccessControl *a )
902 for ( ; *l != NULL; l = &(*l)->acl_next )
909 access2str( slap_access_t access )
911 if ( access == ACL_NONE ) {
914 } else if ( access == ACL_AUTH ) {
917 } else if ( access == ACL_COMPARE ) {
920 } else if ( access == ACL_SEARCH ) {
923 } else if ( access == ACL_READ ) {
926 } else if ( access == ACL_WRITE ) {
934 str2access( const char *str )
936 if ( strcasecmp( str, "none" ) == 0 ) {
939 } else if ( strcasecmp( str, "auth" ) == 0 ) {
942 } else if ( strcasecmp( str, "compare" ) == 0 ) {
945 } else if ( strcasecmp( str, "search" ) == 0 ) {
948 } else if ( strcasecmp( str, "read" ) == 0 ) {
951 } else if ( strcasecmp( str, "write" ) == 0 ) {
955 return( ACL_INVALID_ACCESS );
961 print_access( Access *b )
963 char maskbuf[ACCESSMASK_MAXLEN];
965 fprintf( stderr, "\tby" );
967 if ( b->a_dn_pat != NULL ) {
968 if( strcmp(b->a_dn_pat, "*") == 0
969 || strcmp(b->a_dn_pat, "users") == 0
970 || strcmp(b->a_dn_pat, "anonymous") == 0
971 || strcmp(b->a_dn_pat, "self") == 0 )
973 fprintf( stderr, " %s", b->a_dn_pat );
976 fprintf( stderr, " dn=%s", b->a_dn_pat );
980 if ( b->a_dn_at != NULL ) {
981 fprintf( stderr, " dnattr=%s", b->a_dn_at->ad_cname->bv_val );
984 if ( b->a_group_pat != NULL ) {
985 fprintf( stderr, " group: %s", b->a_group_pat );
987 if ( b->a_group_oc ) {
988 fprintf( stderr, " objectClass: %s", b->a_group_oc );
990 if ( b->a_group_at ) {
991 fprintf( stderr, " attributeType: %s", b->a_group_at->ad_cname->bv_val );
996 if ( b->a_peername_pat != NULL ) {
997 fprintf( stderr, " peername=%s", b->a_peername_pat );
1000 if ( b->a_sockname_pat != NULL ) {
1001 fprintf( stderr, " sockname=%s", b->a_sockname_pat );
1004 if ( b->a_domain_pat != NULL ) {
1005 fprintf( stderr, " domain=%s", b->a_domain_pat );
1008 if ( b->a_sockurl_pat != NULL ) {
1009 fprintf( stderr, " sockurl=%s", b->a_sockurl_pat );
1012 #ifdef SLAPD_ACI_ENABLED
1013 if ( b->a_aci_at != NULL ) {
1014 fprintf( stderr, " aci=%s", b->a_aci_at->ad_cname->bv_val );
1018 fprintf( stderr, " %s%s",
1019 b->a_dn_self ? "self" : "",
1020 accessmask2str( b->a_mask, maskbuf ) );
1022 if( b->a_type == ACL_BREAK ) {
1023 fprintf( stderr, " break" );
1025 } else if( b->a_type == ACL_CONTINUE ) {
1026 fprintf( stderr, " continue" );
1028 } else if( b->a_type != ACL_STOP ) {
1029 fprintf( stderr, " unknown-control" );
1032 fprintf( stderr, "\n" );
1037 print_acl( Backend *be, AccessControl *a )
1042 fprintf( stderr, "%s ACL: access to",
1043 be == NULL ? "Global" : "Backend" );
1045 if ( a->acl_dn_pat != NULL ) {
1047 fprintf( stderr, " dn=%s\n",
1051 if ( a->acl_filter != NULL ) {
1053 fprintf( stderr, " filter=" );
1054 filter_print( a->acl_filter );
1055 fprintf( stderr, "\n" );
1058 if ( a->acl_attrs != NULL ) {
1062 fprintf( stderr, " attrs=" );
1063 for ( i = 0; a->acl_attrs[i] != NULL; i++ ) {
1065 fprintf( stderr, "," );
1067 fprintf( stderr, a->acl_attrs[i] );
1070 fprintf( stderr, "\n" );
1074 fprintf( stderr, " *\n" );
1077 for ( b = a->acl_access; b != NULL; b = b->a_next ) {
1081 fprintf( stderr, "\n" );
1084 #endif /* LDAP_DEBUG */