/* acl.c - routines to parse and check acl's */ /* $OpenLDAP$ */ /* This work is part of OpenLDAP Software . * * Copyright 1998-2004 The OpenLDAP Foundation. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted only as authorized by the OpenLDAP * Public License. * * A copy of this license is available in the file LICENSE in the * top-level directory of the distribution or, alternatively, at * . */ /* Portions Copyright (c) 1995 Regents of the University of Michigan. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that this notice is preserved and that due credit is given * to the University of Michigan at Ann Arbor. The name of the University * may not be used to endorse or promote products derived from this * software without specific prior written permission. This software * is provided ``as is'' without express or implied warranty. */ #include "portable.h" #include #include #include #include #include "slap.h" #include "sets.h" #include "lber_pvt.h" #ifdef LDAP_SLAPI #include "slapi/slapi.h" #endif /* LDAPI_SLAPI */ #define ACL_BUF_SIZE 1024 /* use most appropriate size */ /* * speed up compares */ static struct berval aci_bv_entry = BER_BVC("entry"), aci_bv_children = BER_BVC("children"), aci_bv_br_entry = BER_BVC("[entry]"), aci_bv_br_all = BER_BVC("[all]"), aci_bv_access_id = BER_BVC("access-id"), aci_bv_anonymous = BER_BVC("anonymous"), aci_bv_public = BER_BVC("public"), aci_bv_users = BER_BVC("users"), aci_bv_self = BER_BVC("self"), aci_bv_dnattr = BER_BVC("dnattr"), aci_bv_group = BER_BVC("group"), aci_bv_role = BER_BVC("role"), aci_bv_set = BER_BVC("set"), aci_bv_set_ref = BER_BVC("set-ref"), aci_bv_grant = BER_BVC("grant"), aci_bv_deny = BER_BVC("deny"), aci_bv_ip_eq = BER_BVC("IP="), #ifdef LDAP_PF_LOCAL aci_bv_path_eq = BER_BVC("PATH="), aci_bv_dirsep = BER_BVC(LDAP_DIRSEP), #endif /* LDAP_PF_LOCAL */ aci_bv_group_class = BER_BVC(SLAPD_GROUP_CLASS), aci_bv_group_attr = BER_BVC(SLAPD_GROUP_ATTR), aci_bv_role_class = BER_BVC(SLAPD_ROLE_CLASS), aci_bv_role_attr = BER_BVC(SLAPD_ROLE_ATTR); static AccessControl * acl_get( AccessControl *ac, int *count, Operation *op, Entry *e, AttributeDescription *desc, struct berval *val, int nmatches, regmatch_t *matches, AccessControlState *state ); static slap_control_t acl_mask( AccessControl *ac, slap_mask_t *mask, Operation *op, Entry *e, AttributeDescription *desc, struct berval *val, regmatch_t *matches, int count, AccessControlState *state ); #ifdef SLAPD_ACI_ENABLED static int aci_mask( Operation *op, Entry *e, AttributeDescription *desc, struct berval *val, struct berval *aci, regmatch_t *matches, slap_access_t *grant, slap_access_t *deny, struct berval *scope); #endif static int regex_matches( struct berval *pat, char *str, char *buf, regmatch_t *matches); static void string_expand( struct berval *newbuf, struct berval *pattern, char *match, regmatch_t *matches); typedef struct AciSetCookie { Operation *op; Entry *e; } AciSetCookie; SLAP_SET_GATHER aci_set_gather; static int aci_match_set ( struct berval *subj, Operation *op, Entry *e, int setref ); /* * access_allowed - check whether op->o_ndn is allowed the requested access * to entry e, attribute attr, value val. if val is null, access to * the whole attribute is assumed (all values). * * This routine loops through all access controls and calls * acl_mask() on each applicable access control. * The loop exits when a definitive answer is reached or * or no more controls remain. * * returns: * 0 access denied * 1 access granted */ int access_allowed( Operation *op, Entry *e, AttributeDescription *desc, struct berval *val, slap_access_t access, AccessControlState *state ) { int ret = 1; int count; AccessControl *a = NULL; Backend *be; int be_null = 0; #ifdef LDAP_DEBUG char accessmaskbuf[ACCESSMASK_MAXLEN]; #endif slap_mask_t mask; slap_control_t control; const char *attr; regmatch_t matches[MAXREMATCHES]; int st_same_attr = 0; int st_initialized = 0; static AccessControlState state_init = ACL_STATE_INIT; assert( e != NULL ); assert( desc != NULL ); assert( access > ACL_NONE ); attr = desc->ad_cname.bv_val; assert( attr != NULL ); if( op && op->o_is_auth_check && ( access == ACL_SEARCH || access == ACL_READ )) { access = ACL_AUTH; } if( state && state->as_recorded && state->as_vd_ad==desc) { if( state->as_recorded & ACL_STATE_RECORDED_NV && val == NULL ) { return state->as_result; } else if ( state->as_recorded & ACL_STATE_RECORDED_VD && val != NULL && state->as_vd_acl == NULL ) { return state->as_result; } st_same_attr = 1; } if( state ) { state->as_vd_ad=desc; } #ifdef NEW_LOGGING LDAP_LOG( ACL, ENTRY, "access_allowed: %s access to \"%s\" \"%s\" requested\n", access2str( access ), e->e_dn, attr ); #else Debug( LDAP_DEBUG_ACL, "=> access_allowed: %s access to \"%s\" \"%s\" requested\n", access2str( access ), e->e_dn, attr ); #endif if ( op == NULL ) { /* no-op call */ goto done; } be = op->o_bd; if ( be == NULL ) { be = &backends[0]; be_null = 1; op->o_bd = be; } assert( be != NULL ); #ifdef LDAP_SLAPI if ( op->o_pb != NULL ) { ret = slapi_int_access_allowed( op, e, desc, val, access, state ); if ( ret == 0 ) { /* ACL plugin denied access */ goto done; } } #endif /* LDAP_SLAPI */ /* grant database root access */ if ( be != NULL && be_isroot( be, &op->o_ndn ) ) { #ifdef NEW_LOGGING LDAP_LOG( ACL, INFO, "access_allowed: conn %lu root access granted\n", op->o_connid, 0, 0 ); #else Debug( LDAP_DEBUG_ACL, "<= root access granted\n", 0, 0, 0 ); #endif goto done; } /* * no-user-modification operational attributes are ignored * by ACL_WRITE checking as any found here are not provided * by the user */ if ( access >= ACL_WRITE && is_at_no_user_mod( desc->ad_type ) && desc != slap_schema.si_ad_entry && desc != slap_schema.si_ad_children ) { #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "access_allowed: conn %lu NoUserMod Operational attribute: %s " "access granted\n", op->o_connid, attr , 0 ); #else Debug( LDAP_DEBUG_ACL, "NoUserMod Operational attribute:" " %s access granted\n", attr, 0, 0 ); #endif goto done; } /* use backend default access if no backend acls */ if( be != NULL && be->be_acl == NULL ) { #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "access_allowed: backend default %s access %s to \"%s\"\n", access2str( access ), be->be_dfltaccess >= access ? "granted" : "denied", op->o_dn.bv_val ? op->o_dn.bv_val : "(anonymous)" ); #else Debug( LDAP_DEBUG_ACL, "=> access_allowed: backend default %s access %s to \"%s\"\n", access2str( access ), be->be_dfltaccess >= access ? "granted" : "denied", op->o_dn.bv_val ? op->o_dn.bv_val : "(anonymous)" ); #endif ret = be->be_dfltaccess >= access; goto done; #ifdef notdef /* be is always non-NULL */ /* use global default access if no global acls */ } else if ( be == NULL && global_acl == NULL ) { #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "access_allowed: global default %s access %s to \"%s\"\n", access2str( access ), global_default_access >= access ? "granted" : "denied", op->o_dn.bv_val ); #else Debug( LDAP_DEBUG_ACL, "=> access_allowed: global default %s access %s to \"%s\"\n", access2str( access ), global_default_access >= access ? "granted" : "denied", op->o_dn.bv_val ); #endif ret = global_default_access >= access; goto done; #endif } ret = 0; control = ACL_BREAK; if( st_same_attr ) { assert( state->as_vd_acl != NULL ); a = state->as_vd_acl; count = state->as_vd_acl_count; if ( !ACL_IS_INVALID( state->as_vd_acl_mask )) { mask = state->as_vd_acl_mask; AC_MEMCPY( matches, state->as_vd_acl_matches, sizeof(matches) ); goto vd_access; } } else { if ( state ) state->as_vi_acl = NULL; a = NULL; ACL_INIT(mask); count = 0; memset(matches, '\0', sizeof(matches)); } while((a = acl_get( a, &count, op, e, desc, val, MAXREMATCHES, matches, state )) != NULL) { int i; for (i = 0; i < MAXREMATCHES && matches[i].rm_so > 0; i++) { #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "access_allowed: match[%d]: %d %d ", i, (int)matches[i].rm_so, (int)matches[i].rm_eo ); #else Debug( LDAP_DEBUG_ACL, "=> match[%d]: %d %d ", i, (int)matches[i].rm_so, (int)matches[i].rm_eo ); #endif if( matches[i].rm_so <= matches[0].rm_eo ) { int n; for ( n = matches[i].rm_so; n < matches[i].rm_eo; n++) { Debug( LDAP_DEBUG_ACL, "%c", e->e_ndn[n], 0, 0 ); } } #ifdef NEW_LOGGING LDAP_LOG( ACL, ARGS, "\n" , 0, 0, 0 ); #else Debug( LDAP_DEBUG_ARGS, "\n", 0, 0, 0 ); #endif } if (state) { if (state->as_vi_acl == a && (state->as_recorded & ACL_STATE_RECORDED_NV)) { Debug( LDAP_DEBUG_ACL, "access_allowed: result from state (%s)\n", attr, 0, 0 ); ret = state->as_result; goto done; } else if (!st_initialized) { Debug( LDAP_DEBUG_ACL, "access_allowed: no res from state (%s)\n", attr, 0, 0); *state = state_init; state->as_vd_ad=desc; st_initialized=1; } } vd_access: control = acl_mask( a, &mask, op, e, desc, val, matches, count, state ); if ( control != ACL_BREAK ) { break; } memset(matches, '\0', sizeof(matches)); } if ( ACL_IS_INVALID( mask ) ) { #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "access_allowed: conn %lu \"%s\" (%s) invalid!\n", op->o_connid, e->e_dn, attr ); #else Debug( LDAP_DEBUG_ACL, "=> access_allowed: \"%s\" (%s) invalid!\n", e->e_dn, attr, 0 ); #endif ACL_INIT(mask); } else if ( control == ACL_BREAK ) { #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "access_allowed: conn %lu no more rules\n", op->o_connid, 0,0 ); #else Debug( LDAP_DEBUG_ACL, "=> access_allowed: no more rules\n", 0, 0, 0); #endif goto done; } #ifdef NEW_LOGGING LDAP_LOG( ACL, ENTRY, "access_allowed: %s access %s by %s\n", access2str( access ), ACL_GRANT( mask, access ) ? "granted" : "denied", accessmask2str( mask, accessmaskbuf ) ); #else Debug( LDAP_DEBUG_ACL, "=> access_allowed: %s access %s by %s\n", access2str( access ), ACL_GRANT(mask, access) ? "granted" : "denied", accessmask2str( mask, accessmaskbuf ) ); #endif ret = ACL_GRANT(mask, access); done: if( state != NULL ) { /* If not value-dependent, save ACL in case of more attrs */ if ( !(state->as_recorded & ACL_STATE_RECORDED_VD) ) { state->as_vi_acl = a; state->as_result = ret; } state->as_recorded |= ACL_STATE_RECORDED; } if (be_null) op->o_bd = NULL; return ret; } /* * acl_get - return the acl applicable to entry e, attribute * attr. the acl returned is suitable for use in subsequent calls to * acl_access_allowed(). */ static AccessControl * acl_get( AccessControl *a, int *count, Operation *op, Entry *e, AttributeDescription *desc, struct berval *val, int nmatch, regmatch_t *matches, AccessControlState *state ) { const char *attr; int dnlen, patlen; assert( e != NULL ); assert( count != NULL ); assert( desc != NULL ); attr = desc->ad_cname.bv_val; assert( attr != NULL ); if( a == NULL ) { if( op->o_bd == NULL ) { a = global_acl; } else { a = op->o_bd->be_acl; } assert( a != NULL ); } else { a = a->acl_next; } dnlen = e->e_nname.bv_len; for ( ; a != NULL; a = a->acl_next ) { (*count) ++; if ( a->acl_dn_pat.bv_len || ( a->acl_dn_style != ACL_STYLE_REGEX )) { if ( a->acl_dn_style == ACL_STYLE_REGEX ) { #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "acl_get: dnpat [%d] %s nsub: %d\n", *count, a->acl_dn_pat.bv_val, (int) a->acl_dn_re.re_nsub ); #else Debug( LDAP_DEBUG_ACL, "=> dnpat: [%d] %s nsub: %d\n", *count, a->acl_dn_pat.bv_val, (int) a->acl_dn_re.re_nsub ); #endif if (regexec(&a->acl_dn_re, e->e_ndn, nmatch, matches, 0)) continue; } else { #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "acl_get: dn [%d] %s\n", *count, a->acl_dn_pat.bv_val, 0 ); #else Debug( LDAP_DEBUG_ACL, "=> dn: [%d] %s\n", *count, a->acl_dn_pat.bv_val, 0 ); #endif patlen = a->acl_dn_pat.bv_len; if ( dnlen < patlen ) continue; if ( a->acl_dn_style == ACL_STYLE_BASE ) { /* base dn -- entire object DN must match */ if ( dnlen != patlen ) continue; } else if ( a->acl_dn_style == ACL_STYLE_ONE ) { int rdnlen = -1; if ( dnlen <= patlen ) continue; if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) ) continue; rdnlen = dn_rdnlen( NULL, &e->e_nname ); if ( rdnlen != dnlen - patlen - 1 ) continue; } else if ( a->acl_dn_style == ACL_STYLE_SUBTREE ) { if ( dnlen > patlen && !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) ) continue; } else if ( a->acl_dn_style == ACL_STYLE_CHILDREN ) { if ( dnlen <= patlen ) continue; if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) ) continue; } if ( strcmp( a->acl_dn_pat.bv_val, e->e_ndn + dnlen - patlen ) != 0 ) continue; } #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "acl_get: [%d] matched\n", *count, 0, 0 ); #else Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] matched\n", *count, 0, 0 ); #endif } if ( a->acl_attrs && !ad_inlist( desc, a->acl_attrs ) ) { matches[0].rm_so = matches[0].rm_eo = -1; continue; } /* Is this ACL only for a specific value? */ if ( a->acl_attrval.bv_len ) { if ( val == NULL ) { continue; } if( state && !( state->as_recorded & ACL_STATE_RECORDED_VD )) { state->as_recorded |= ACL_STATE_RECORDED_VD; state->as_vd_acl = a; state->as_vd_acl_count = *count; state->as_vd_access = a->acl_access; state->as_vd_access_count = 1; ACL_INVALIDATE( state->as_vd_acl_mask ); } if ( a->acl_attrval_style == ACL_STYLE_REGEX ) { #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "acl_get: valpat %s\n", a->acl_attrval.bv_val, 0, 0 ); #else Debug( LDAP_DEBUG_ACL, "acl_get: valpat %s\n", a->acl_attrval.bv_val, 0, 0 ); #endif if (regexec(&a->acl_attrval_re, val->bv_val, 0, NULL, 0)) continue; } else { int match = 0; const char *text; #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "acl_get: val %s\n", a->acl_attrval.bv_val, 0, 0 ); #else Debug( LDAP_DEBUG_ACL, "acl_get: val %s\n", a->acl_attrval.bv_val, 0, 0 ); #endif if ( a->acl_attrs[0].an_desc->ad_type->sat_syntax != slap_schema.si_syn_distinguishedName ) { if (value_match( &match, desc, desc->ad_type->sat_equality, 0, val, &a->acl_attrval, &text ) != LDAP_SUCCESS || match ) continue; } else { int patlen, vdnlen; patlen = a->acl_attrval.bv_len; vdnlen = val->bv_len; if ( vdnlen < patlen ) continue; if ( a->acl_dn_style == ACL_STYLE_BASE ) { if ( vdnlen > patlen ) continue; } else if ( a->acl_dn_style == ACL_STYLE_ONE ) { int rdnlen = -1; if ( !DN_SEPARATOR( val->bv_val[vdnlen - patlen - 1] ) ) continue; rdnlen = dn_rdnlen( NULL, val ); if ( rdnlen != vdnlen - patlen - 1 ) continue; } else if ( a->acl_dn_style == ACL_STYLE_SUBTREE ) { if ( vdnlen > patlen && !DN_SEPARATOR( val->bv_val[vdnlen - patlen - 1] ) ) continue; } else if ( a->acl_dn_style == ACL_STYLE_CHILDREN ) { if ( vdnlen <= patlen ) continue; if ( !DN_SEPARATOR( val->bv_val[vdnlen - patlen - 1] ) ) continue; } if ( strcmp( a->acl_attrval.bv_val, val->bv_val + vdnlen - patlen )) continue; } } } if ( a->acl_filter != NULL ) { ber_int_t rc = test_filter( NULL, e, a->acl_filter ); if ( rc != LDAP_COMPARE_TRUE ) { continue; } } #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "acl_get: [%d] attr %s\n", *count, attr ,0 ); #else Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] attr %s\n", *count, attr, 0); #endif return a; } #ifdef NEW_LOGGING LDAP_LOG( ACL, RESULTS, "acl_get: done.\n", 0, 0, 0 ); #else Debug( LDAP_DEBUG_ACL, "<= acl_get: done.\n", 0, 0, 0 ); #endif return( NULL ); } /* * Record value-dependent access control state */ #define ACL_RECORD_VALUE_STATE do { \ if( state && !( state->as_recorded & ACL_STATE_RECORDED_VD )) { \ state->as_recorded |= ACL_STATE_RECORDED_VD; \ state->as_vd_acl = a; \ AC_MEMCPY( state->as_vd_acl_matches, matches, \ sizeof( state->as_vd_acl_matches )) ; \ state->as_vd_acl_count = count; \ state->as_vd_access = b; \ state->as_vd_access_count = i; \ } \ } while( 0 ) /* * acl_mask - modifies mask based upon the given acl and the * requested access to entry e, attribute attr, value val. if val * is null, access to the whole attribute is assumed (all values). * * returns 0 access NOT allowed * 1 access allowed */ static slap_control_t acl_mask( AccessControl *a, slap_mask_t *mask, Operation *op, Entry *e, AttributeDescription *desc, struct berval *val, regmatch_t *matches, int count, AccessControlState *state ) { int i, odnlen, patlen; Access *b; #ifdef LDAP_DEBUG char accessmaskbuf[ACCESSMASK_MAXLEN]; char accessmaskbuf1[ACCESSMASK_MAXLEN]; #endif const char *attr; assert( a != NULL ); assert( mask != NULL ); assert( desc != NULL ); attr = desc->ad_cname.bv_val; assert( attr != NULL ); #ifdef NEW_LOGGING LDAP_LOG( ACL, ENTRY, "acl_mask: conn %lu access to entry \"%s\", attr \"%s\" requested\n", op->o_connid, e->e_dn, attr ); LDAP_LOG( ACL, ARGS, " to %s by \"%s\", (%s) \n", val ? "value" : "all values", op->o_ndn.bv_val ? op->o_ndn.bv_val : "", accessmask2str( *mask, accessmaskbuf ) ); #else Debug( LDAP_DEBUG_ACL, "=> acl_mask: access to entry \"%s\", attr \"%s\" requested\n", e->e_dn, attr, 0 ); Debug( LDAP_DEBUG_ACL, "=> acl_mask: to %s by \"%s\", (%s) \n", val ? "value" : "all values", op->o_ndn.bv_val ? op->o_ndn.bv_val : "", accessmask2str( *mask, accessmaskbuf ) ); #endif if( state && ( state->as_recorded & ACL_STATE_RECORDED_VD ) && state->as_vd_acl == a ) { b = state->as_vd_access; i = state->as_vd_access_count; } else { b = a->acl_access; i = 1; } for ( ; b != NULL; b = b->a_next, i++ ) { slap_mask_t oldmask, modmask; ACL_INVALIDATE( modmask ); /* AND clauses */ if ( b->a_dn_pat.bv_len != 0 ) { #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "acl_mask: conn %lu check a_dn_pat: %s\n", op->o_connid, b->a_dn_pat.bv_val ,0 ); #else Debug( LDAP_DEBUG_ACL, "<= check a_dn_pat: %s\n", b->a_dn_pat.bv_val, 0, 0); #endif /* * if access applies to the entry itself, and the * user is bound as somebody in the same namespace as * the entry, OR the given dn matches the dn pattern */ if ( bvmatch( &b->a_dn_pat, &aci_bv_anonymous ) ) { if ( op->o_ndn.bv_len != 0 ) { continue; } } else if ( bvmatch( &b->a_dn_pat, &aci_bv_users ) ) { if ( op->o_ndn.bv_len == 0 ) { continue; } } else if ( bvmatch( &b->a_dn_pat, &aci_bv_self ) ) { if ( op->o_ndn.bv_len == 0 ) { continue; } if ( e->e_dn == NULL || !dn_match( &e->e_nname, &op->o_ndn ) ) { continue; } } else if ( b->a_dn_style == ACL_STYLE_REGEX ) { if ( !ber_bvccmp( &b->a_dn_pat, '*' ) ) { int ret = regex_matches( &b->a_dn_pat, op->o_ndn.bv_val, e->e_ndn, matches ); if( ret == 0 ) { continue; } } } else { struct berval pat; int got_match = 0; if ( e->e_dn == NULL ) continue; if ( b->a_dn_expand ) { struct berval bv; char buf[ACL_BUF_SIZE]; bv.bv_len = sizeof( buf ) - 1; bv.bv_val = buf; string_expand(&bv, &b->a_dn_pat, e->e_ndn, matches); if ( dnNormalize(0, NULL, NULL, &bv, &pat, op->o_tmpmemctx ) != LDAP_SUCCESS ) { /* did not expand to a valid dn */ continue; } } else { pat = b->a_dn_pat; } patlen = pat.bv_len; odnlen = op->o_ndn.bv_len; if ( odnlen < patlen ) { goto dn_match_cleanup; } if ( b->a_dn_style == ACL_STYLE_BASE ) { /* base dn -- entire object DN must match */ if ( odnlen != patlen ) { goto dn_match_cleanup; } } else if ( b->a_dn_style == ACL_STYLE_ONE ) { int rdnlen = -1; if ( odnlen <= patlen ) { goto dn_match_cleanup; } if ( !DN_SEPARATOR( op->o_ndn.bv_val[odnlen - patlen - 1] ) ) { goto dn_match_cleanup; } rdnlen = dn_rdnlen( NULL, &op->o_ndn ); if ( rdnlen != odnlen - patlen - 1 ) { goto dn_match_cleanup; } } else if ( b->a_dn_style == ACL_STYLE_SUBTREE ) { if ( odnlen > patlen && !DN_SEPARATOR( op->o_ndn.bv_val[odnlen - patlen - 1] ) ) { goto dn_match_cleanup; } } else if ( b->a_dn_style == ACL_STYLE_CHILDREN ) { if ( odnlen <= patlen ) { goto dn_match_cleanup; } if ( !DN_SEPARATOR( op->o_ndn.bv_val[odnlen - patlen - 1] ) ) { goto dn_match_cleanup; } } got_match = !strcmp( pat.bv_val, op->o_ndn.bv_val + odnlen - patlen ); dn_match_cleanup:; if ( pat.bv_val != b->a_dn_pat.bv_val ) { free( pat.bv_val ); } if ( !got_match ) { continue; } } } if ( b->a_sockurl_pat.bv_len ) { if ( ! op->o_conn->c_listener ) { continue; } #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "acl_mask: conn %lu check a_sockurl_pat: %s\n", op->o_connid, b->a_sockurl_pat.bv_val , 0 ); #else Debug( LDAP_DEBUG_ACL, "<= check a_sockurl_pat: %s\n", b->a_sockurl_pat.bv_val, 0, 0 ); #endif if ( !ber_bvccmp( &b->a_sockurl_pat, '*' ) ) { if ( b->a_sockurl_style == ACL_STYLE_REGEX) { if (!regex_matches( &b->a_sockurl_pat, op->o_conn->c_listener_url.bv_val, e->e_ndn, matches ) ) { continue; } } else if ( b->a_sockurl_style == ACL_STYLE_EXPAND ) { struct berval bv; char buf[ACL_BUF_SIZE]; bv.bv_len = sizeof( buf ) - 1; bv.bv_val = buf; string_expand( &bv, &b->a_sockurl_pat, e->e_ndn, matches ); if ( ber_bvstrcasecmp( &bv, &op->o_conn->c_listener_url ) != 0 ) { continue; } } else { if ( ber_bvstrcasecmp( &b->a_sockurl_pat, &op->o_conn->c_listener_url ) != 0 ) continue; } } } if ( b->a_domain_pat.bv_len ) { if ( !op->o_conn->c_peer_domain.bv_val ) { continue; } #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "acl_mask: conn %lu check a_domain_pat: %s\n", op->o_connid, b->a_domain_pat.bv_val , 0 ); #else Debug( LDAP_DEBUG_ACL, "<= check a_domain_pat: %s\n", b->a_domain_pat.bv_val, 0, 0 ); #endif if ( !ber_bvccmp( &b->a_domain_pat, '*' ) ) { if ( b->a_domain_style == ACL_STYLE_REGEX) { if (!regex_matches( &b->a_domain_pat, op->o_conn->c_peer_domain.bv_val, e->e_ndn, matches ) ) { continue; } } else { char buf[ACL_BUF_SIZE]; struct berval cmp = op->o_conn->c_peer_domain; struct berval pat = b->a_domain_pat; if ( b->a_domain_expand ) { struct berval bv; bv.bv_len = sizeof(buf) - 1; bv.bv_val = buf; string_expand(&bv, &b->a_domain_pat, e->e_ndn, matches); pat = bv; } if ( b->a_domain_style == ACL_STYLE_SUBTREE ) { int offset = cmp.bv_len - pat.bv_len; if ( offset < 0 ) { continue; } if ( offset == 1 || ( offset > 1 && cmp.bv_val[ offset - 1 ] != '.' ) ) { continue; } /* trim the domain */ cmp.bv_val = &cmp.bv_val[ offset ]; cmp.bv_len -= offset; } if ( ber_bvstrcasecmp( &pat, &cmp ) != 0 ) { continue; } } } } if ( b->a_peername_pat.bv_len ) { if ( !op->o_conn->c_peer_name.bv_val ) { continue; } #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "acl_mask: conn %lu check a_peername_path: %s\n", op->o_connid, b->a_peername_pat.bv_val , 0 ); #else Debug( LDAP_DEBUG_ACL, "<= check a_peername_path: %s\n", b->a_peername_pat.bv_val, 0, 0 ); #endif if ( !ber_bvccmp( &b->a_peername_pat, '*' ) ) { if ( b->a_peername_style == ACL_STYLE_REGEX ) { if (!regex_matches( &b->a_peername_pat, op->o_conn->c_peer_name.bv_val, e->e_ndn, matches ) ) { continue; } } else { /* try exact match */ if ( b->a_peername_style == ACL_STYLE_BASE ) { if ( ber_bvstrcasecmp( &b->a_peername_pat, &op->o_conn->c_peer_name ) != 0 ) { continue; } } else if ( b->a_peername_style == ACL_STYLE_EXPAND ) { struct berval bv; char buf[ACL_BUF_SIZE]; bv.bv_len = sizeof( buf ) - 1; bv.bv_val = buf; string_expand( &bv, &b->a_peername_pat, e->e_ndn, matches ); if ( ber_bvstrcasecmp( &bv, &op->o_conn->c_peer_name ) != 0 ) { continue; } /* extract IP and try exact match */ } else if ( b->a_peername_style == ACL_STYLE_IP ) { char *port; char buf[] = "255.255.255.255"; struct berval ip; unsigned long addr; int port_number = -1; if ( strncasecmp( op->o_conn->c_peer_name.bv_val, aci_bv_ip_eq.bv_val, aci_bv_ip_eq.bv_len ) != 0 ) continue; ip.bv_val = op->o_conn->c_peer_name.bv_val + aci_bv_ip_eq.bv_len; ip.bv_len = op->o_conn->c_peer_name.bv_len - aci_bv_ip_eq.bv_len; port = strrchr( ip.bv_val, ':' ); if ( port ) { char *next; ip.bv_len = port - ip.bv_val; ++port; port_number = strtol( port, &next, 10 ); if ( next[0] != '\0' ) continue; } /* the port check can be anticipated here */ if ( b->a_peername_port != -1 && port_number != b->a_peername_port ) continue; /* address longer than expected? */ if ( ip.bv_len >= sizeof(buf) ) continue; AC_MEMCPY( buf, ip.bv_val, ip.bv_len ); buf[ ip.bv_len ] = '\0'; addr = inet_addr( buf ); /* unable to convert? */ if ( addr == (unsigned long)(-1) ) continue; if ( (addr & b->a_peername_mask) != b->a_peername_addr ) continue; #ifdef LDAP_PF_LOCAL /* extract path and try exact match */ } else if ( b->a_peername_style == ACL_STYLE_PATH ) { struct berval path; if ( strncmp( op->o_conn->c_peer_name.bv_val, aci_bv_path_eq.bv_val, aci_bv_path_eq.bv_len ) != 0 ) continue; path.bv_val = op->o_conn->c_peer_name.bv_val + aci_bv_path_eq.bv_len; path.bv_len = op->o_conn->c_peer_name.bv_len - aci_bv_path_eq.bv_len; if ( ber_bvcmp( &b->a_peername_pat, &path ) != 0 ) continue; #endif /* LDAP_PF_LOCAL */ /* exact match (very unlikely...) */ } else if ( ber_bvcmp( &op->o_conn->c_peer_name, &b->a_peername_pat ) != 0 ) { continue; } } } } if ( b->a_sockname_pat.bv_len ) { if ( !op->o_conn->c_sock_name.bv_val ) { continue; } #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "acl_mask: conn %lu check a_sockname_path: %s\n", op->o_connid, b->a_sockname_pat.bv_val , 0 ); #else Debug( LDAP_DEBUG_ACL, "<= check a_sockname_path: %s\n", b->a_sockname_pat.bv_val, 0, 0 ); #endif if ( !ber_bvccmp( &b->a_sockname_pat, '*' ) ) { if ( b->a_sockname_style == ACL_STYLE_REGEX) { if (!regex_matches( &b->a_sockname_pat, op->o_conn->c_sock_name.bv_val, e->e_ndn, matches ) ) { continue; } } else if ( b->a_sockname_style == ACL_STYLE_EXPAND ) { struct berval bv; char buf[ACL_BUF_SIZE]; bv.bv_len = sizeof( buf ) - 1; bv.bv_val = buf; string_expand( &bv, &b->a_sockname_pat, e->e_ndn, matches ); if ( ber_bvstrcasecmp( &bv, &op->o_conn->c_sock_name ) != 0 ) { continue; } } else { if ( ber_bvstrcasecmp( &b->a_sockname_pat, &op->o_conn->c_sock_name ) != 0 ) continue; } } } if ( b->a_dn_at != NULL ) { Attribute *at; struct berval bv; int rc, match = 0; const char *text; const char *attr = b->a_dn_at->ad_cname.bv_val; assert( attr != NULL ); if ( op->o_ndn.bv_len == 0 ) { continue; } #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "acl_mask: conn %lu check a_dn_pat: %s\n", op->o_connid, attr , 0 ); #else Debug( LDAP_DEBUG_ACL, "<= check a_dn_at: %s\n", attr, 0, 0); #endif bv = op->o_ndn; /* see if asker is listed in dnattr */ for( at = attrs_find( e->e_attrs, b->a_dn_at ); at != NULL; at = attrs_find( at->a_next, b->a_dn_at ) ) { if( value_find_ex( b->a_dn_at, SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH | SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH, at->a_nvals, &bv, op->o_tmpmemctx ) == 0 ) { /* found it */ match = 1; break; } } if( match ) { /* have a dnattr match. if this is a self clause then * the target must also match the op dn. */ if ( b->a_dn_self ) { /* check if the target is an attribute. */ if ( val == NULL ) continue; /* target is attribute, check if the attribute value * is the op dn. */ rc = value_match( &match, b->a_dn_at, b->a_dn_at->ad_type->sat_equality, 0, val, &bv, &text ); /* on match error or no match, fail the ACL clause */ if (rc != LDAP_SUCCESS || match != 0 ) continue; } } else { /* no dnattr match, check if this is a self clause */ if ( ! b->a_dn_self ) continue; ACL_RECORD_VALUE_STATE; /* this is a self clause, check if the target is an * attribute. */ if ( val == NULL ) continue; /* target is attribute, check if the attribute value * is the op dn. */ rc = value_match( &match, b->a_dn_at, b->a_dn_at->ad_type->sat_equality, 0, val, &bv, &text ); /* on match error or no match, fail the ACL clause */ if (rc != LDAP_SUCCESS || match != 0 ) continue; } } if ( b->a_group_pat.bv_len ) { struct berval bv; struct berval ndn = { 0, NULL }; int rc; if ( op->o_ndn.bv_len == 0 ) { continue; } /* b->a_group is an unexpanded entry name, expanded it should be an * entry with objectclass group* and we test to see if odn is one of * the values in the attribute group */ /* see if asker is listed in dnattr */ if ( b->a_group_style == ACL_STYLE_EXPAND ) { char buf[ACL_BUF_SIZE]; bv.bv_len = sizeof(buf) - 1; bv.bv_val = buf; string_expand( &bv, &b->a_group_pat, e->e_ndn, matches ); if ( dnNormalize( 0, NULL, NULL, &bv, &ndn, op->o_tmpmemctx ) != LDAP_SUCCESS ) { /* did not expand to a valid dn */ continue; } bv = ndn; } else { bv = b->a_group_pat; } rc = backend_group( op, e, &bv, &op->o_ndn, b->a_group_oc, b->a_group_at ); if ( ndn.bv_val ) free( ndn.bv_val ); if ( rc != 0 ) { continue; } } if ( b->a_set_pat.bv_len != 0 ) { struct berval bv; char buf[ACL_BUF_SIZE]; if( b->a_set_style == ACL_STYLE_REGEX ){ bv.bv_len = sizeof(buf) - 1; bv.bv_val = buf; string_expand( &bv, &b->a_set_pat, e->e_ndn, matches ); }else{ bv = b->a_set_pat; } if (aci_match_set( &bv, op, e, 0 ) == 0) { continue; } } if ( b->a_authz.sai_ssf ) { #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "acl_mask: conn %lu check a_authz.sai_ssf: ACL %u > OP %u\n", op->o_connid, b->a_authz.sai_ssf, op->o_ssf ); #else Debug( LDAP_DEBUG_ACL, "<= check a_authz.sai_ssf: ACL %u > OP %u\n", b->a_authz.sai_ssf, op->o_ssf, 0 ); #endif if ( b->a_authz.sai_ssf > op->o_ssf ) { continue; } } if ( b->a_authz.sai_transport_ssf ) { #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "acl_mask: conn %lu check a_authz.sai_transport_ssf: " "ACL %u > OP %u\n", op->o_connid, b->a_authz.sai_transport_ssf, op->o_transport_ssf ); #else Debug( LDAP_DEBUG_ACL, "<= check a_authz.sai_transport_ssf: ACL %u > OP %u\n", b->a_authz.sai_transport_ssf, op->o_transport_ssf, 0 ); #endif if ( b->a_authz.sai_transport_ssf > op->o_transport_ssf ) { continue; } } if ( b->a_authz.sai_tls_ssf ) { #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "acl_mask: conn %lu check a_authz.sai_tls_ssf: ACL %u > " "OP %u\n", op->o_connid, b->a_authz.sai_tls_ssf, op->o_tls_ssf ); #else Debug( LDAP_DEBUG_ACL, "<= check a_authz.sai_tls_ssf: ACL %u > OP %u\n", b->a_authz.sai_tls_ssf, op->o_tls_ssf, 0 ); #endif if ( b->a_authz.sai_tls_ssf > op->o_tls_ssf ) { continue; } } if ( b->a_authz.sai_sasl_ssf ) { #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "acl_mask: conn %lu check a_authz.sai_sasl_ssf: " "ACL %u > OP %u\n", op->o_connid, b->a_authz.sai_sasl_ssf, op->o_sasl_ssf ); #else Debug( LDAP_DEBUG_ACL, "<= check a_authz.sai_sasl_ssf: ACL %u > OP %u\n", b->a_authz.sai_sasl_ssf, op->o_sasl_ssf, 0 ); #endif if ( b->a_authz.sai_sasl_ssf > op->o_sasl_ssf ) { continue; } } #ifdef SLAPD_ACI_ENABLED if ( b->a_aci_at != NULL ) { Attribute *at; slap_access_t grant, deny, tgrant, tdeny; struct berval parent_ndn, old_parent_ndn; BerVarray bvals = NULL; int ret,stop; /* this case works different from the others above. * since aci's themselves give permissions, we need * to first check b->a_access_mask, the ACL's access level. */ if ( e->e_nname.bv_len == 0 ) { /* no ACIs in the root DSE */ continue; } /* first check if the right being requested * is allowed by the ACL clause. */ if ( ! ACL_GRANT( b->a_access_mask, *mask ) ) { continue; } /* start out with nothing granted, nothing denied */ ACL_INIT(tgrant); ACL_INIT(tdeny); /* get the aci attribute */ at = attr_find( e->e_attrs, b->a_aci_at ); if ( at != NULL ) { ACL_RECORD_VALUE_STATE; /* the aci is an multi-valued attribute. The * rights are determined by OR'ing the individual * rights given by the acis. */ for ( i = 0; at->a_vals[i].bv_val != NULL; i++ ) { if (aci_mask( op, e, desc, val, &at->a_nvals[i], matches, &grant, &deny, &aci_bv_entry ) != 0) { tgrant |= grant; tdeny |= deny; } } Debug(LDAP_DEBUG_ACL, "<= aci_mask grant %s deny %s\n", accessmask2str(tgrant,accessmaskbuf), accessmask2str(tdeny, accessmaskbuf1), 0); } /* If the entry level aci didn't contain anything valid for the * current operation, climb up the tree and evaluate the * acis with scope set to subtree */ if( (tgrant == ACL_PRIV_NONE) && (tdeny == ACL_PRIV_NONE) ){ dnParent(&(e->e_nname), &parent_ndn); while ( parent_ndn.bv_val != old_parent_ndn.bv_val ){ old_parent_ndn = parent_ndn; Debug(LDAP_DEBUG_ACL, "checking ACI of %s\n", parent_ndn.bv_val, 0, 0); ret=backend_attribute(op, NULL, &parent_ndn, b->a_aci_at, &bvals); switch(ret){ case LDAP_SUCCESS : if(bvals){ for( i = 0; bvals[i].bv_val != NULL; i++){ ACL_RECORD_VALUE_STATE; if (aci_mask(op, e, desc, val, &bvals[i], matches, &grant, &deny, &aci_bv_children) != 0) { tgrant |= grant; tdeny |= deny; /* evaluation stops as soon as either a "deny" or a * "grant" directive matches. */ if( (tgrant != ACL_PRIV_NONE) || (tdeny != ACL_PRIV_NONE) ){ stop=1; } } Debug(LDAP_DEBUG_ACL, "<= aci_mask grant %s deny %s\n", accessmask2str(tgrant,accessmaskbuf), accessmask2str(tdeny, accessmaskbuf1), 0); } } stop=0; break; case LDAP_NO_SUCH_ATTRIBUTE: /* just go on if the aci-Attribute is not present in * the current entry */ Debug(LDAP_DEBUG_ACL, "no such attribute\n", 0, 0, 0); stop=0; break; case LDAP_NO_SUCH_OBJECT: /* We have reached the base object */ Debug(LDAP_DEBUG_ACL, "no such object\n", 0, 0, 0); stop=1; break; default: stop=1; break; } if(stop){ break; } dnParent(&old_parent_ndn, &parent_ndn); } } /* remove anything that the ACL clause does not allow */ tgrant &= b->a_access_mask & ACL_PRIV_MASK; tdeny &= ACL_PRIV_MASK; /* see if we have anything to contribute */ if( ACL_IS_INVALID(tgrant) && ACL_IS_INVALID(tdeny) ) { continue; } /* this could be improved by changing acl_mask so that it can deal with * by clauses that return grant/deny pairs. Right now, it does either * additive or subtractive rights, but not both at the same time. So, * we need to combine the grant/deny pair into a single rights mask in * a smart way: if either grant or deny is "empty", then we use the * opposite as is, otherwise we remove any denied rights from the grant * rights mask and construct an additive mask. */ if (ACL_IS_INVALID(tdeny)) { modmask = tgrant | ACL_PRIV_ADDITIVE; } else if (ACL_IS_INVALID(tgrant)) { modmask = tdeny | ACL_PRIV_SUBSTRACTIVE; } else { modmask = (tgrant & ~tdeny) | ACL_PRIV_ADDITIVE; } } else #endif { modmask = b->a_access_mask; } #ifdef NEW_LOGGING LDAP_LOG( ACL, RESULTS, "acl_mask: [%d] applying %s (%s)\n", i, accessmask2str( modmask, accessmaskbuf), b->a_type == ACL_CONTINUE ? "continue" : b->a_type == ACL_BREAK ? "break" : "stop" ); #else Debug( LDAP_DEBUG_ACL, "<= acl_mask: [%d] applying %s (%s)\n", i, accessmask2str( modmask, accessmaskbuf ), b->a_type == ACL_CONTINUE ? "continue" : b->a_type == ACL_BREAK ? "break" : "stop" ); #endif /* save old mask */ oldmask = *mask; if( ACL_IS_ADDITIVE(modmask) ) { /* add privs */ ACL_PRIV_SET( *mask, modmask ); /* cleanup */ ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK ); } else if( ACL_IS_SUBTRACTIVE(modmask) ) { /* substract privs */ ACL_PRIV_CLR( *mask, modmask ); /* cleanup */ ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK ); } else { /* assign privs */ *mask = modmask; } #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "acl_mask: conn %lu [%d] mask: %s\n", op->o_connid, i, accessmask2str( *mask, accessmaskbuf) ); #else Debug( LDAP_DEBUG_ACL, "<= acl_mask: [%d] mask: %s\n", i, accessmask2str(*mask, accessmaskbuf), 0 ); #endif if( b->a_type == ACL_CONTINUE ) { continue; } else if ( b->a_type == ACL_BREAK ) { return ACL_BREAK; } else { return ACL_STOP; } } /* implicit "by * none" clause */ ACL_INIT(*mask); #ifdef NEW_LOGGING LDAP_LOG( ACL, RESULTS, "acl_mask: conn %lu no more clauses, returning %d (stop)\n", op->o_connid, accessmask2str( *mask, accessmaskbuf) , 0 ); #else Debug( LDAP_DEBUG_ACL, "<= acl_mask: no more clauses, returning %s (stop)\n", accessmask2str(*mask, accessmaskbuf), 0, 0 ); #endif return ACL_STOP; } /* * acl_check_modlist - check access control on the given entry to see if * it allows the given modifications by the user associated with op. * returns 1 if mods allowed ok * 0 mods not allowed */ int acl_check_modlist( Operation *op, Entry *e, Modifications *mlist ) { struct berval *bv; AccessControlState state = ACL_STATE_INIT; Backend *be; int be_null = 0; int ret = 1; /* default is access allowed */ be = op->o_bd; if ( be == NULL ) { be = &backends[0]; be_null = 1; op->o_bd = be; } assert( be != NULL ); /* short circuit root database access */ if ( be_isroot( op->o_bd, &op->o_ndn ) ) { #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "acl_check_modlist: conn %lu access granted to root user\n", op->o_connid, 0, 0 ); #else Debug( LDAP_DEBUG_ACL, "<= acl_access_allowed: granted to database root\n", 0, 0, 0 ); #endif goto done; } /* use backend default access if no backend acls */ if( op->o_bd != NULL && op->o_bd->be_acl == NULL ) { #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "acl_check_modlist: backend default %s access %s to \"%s\"\n", access2str( ACL_WRITE ), op->o_bd->be_dfltaccess >= ACL_WRITE ? "granted" : "denied", op->o_dn.bv_val ); #else Debug( LDAP_DEBUG_ACL, "=> access_allowed: backend default %s access %s to \"%s\"\n", access2str( ACL_WRITE ), op->o_bd->be_dfltaccess >= ACL_WRITE ? "granted" : "denied", op->o_dn.bv_val ); #endif ret = (op->o_bd->be_dfltaccess >= ACL_WRITE); goto done; } for ( ; mlist != NULL; mlist = mlist->sml_next ) { /* * no-user-modification operational attributes are ignored * by ACL_WRITE checking as any found here are not provided * by the user */ if ( is_at_no_user_mod( mlist->sml_desc->ad_type ) ) { #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "acl_check_modlist: conn %lu no-user-mod %s: modify access granted\n", op->o_connid, mlist->sml_desc->ad_cname.bv_val , 0 ); #else Debug( LDAP_DEBUG_ACL, "acl: no-user-mod %s:" " modify access granted\n", mlist->sml_desc->ad_cname.bv_val, 0, 0 ); #endif continue; } switch ( mlist->sml_op ) { case LDAP_MOD_REPLACE: /* * We must check both permission to delete the whole * attribute and permission to add the specific attributes. * This prevents abuse from selfwriters. */ if ( ! access_allowed( op, e, mlist->sml_desc, NULL, ACL_WRITE, &state ) ) { ret = 0; goto done; } if ( mlist->sml_bvalues == NULL ) break; /* fall thru to check value to add */ case LDAP_MOD_ADD: assert( mlist->sml_bvalues != NULL ); for ( bv = mlist->sml_nvalues ? mlist->sml_nvalues : mlist->sml_values; bv->bv_val != NULL; bv++ ) { if ( ! access_allowed( op, e, mlist->sml_desc, bv, ACL_WRITE, &state ) ) { ret = 0; goto done; } } break; case LDAP_MOD_DELETE: if ( mlist->sml_bvalues == NULL ) { if ( ! access_allowed( op, e, mlist->sml_desc, NULL, ACL_WRITE, NULL ) ) { ret = 0; goto done; } break; } for ( bv = mlist->sml_nvalues ? mlist->sml_nvalues : mlist->sml_values; bv->bv_val != NULL; bv++ ) { if ( ! access_allowed( op, e, mlist->sml_desc, bv, ACL_WRITE, &state ) ) { ret = 0; goto done; } } break; case SLAP_MOD_SOFTADD: /* allow adding attribute via modrdn thru */ break; default: assert( 0 ); /* not reached */ ret = 0; break; } } done: if (be_null) op->o_bd = NULL; return( ret ); } static int aci_get_part( struct berval *list, int ix, char sep, struct berval *bv ) { int len; char *p; if (bv) { bv->bv_len = 0; bv->bv_val = NULL; } len = list->bv_len; p = list->bv_val; while (len >= 0 && --ix >= 0) { while (--len >= 0 && *p++ != sep) ; } while (len >= 0 && *p == ' ') { len--; p++; } if (len < 0) return(-1); if (!bv) return(0); bv->bv_val = p; while (--len >= 0 && *p != sep) { bv->bv_len++; p++; } while (bv->bv_len > 0 && *--p == ' ') bv->bv_len--; return(bv->bv_len); } BerVarray aci_set_gather (SetCookie *cookie, struct berval *name, struct berval *attr) { AciSetCookie *cp = (AciSetCookie *)cookie; BerVarray bvals = NULL; struct berval ndn; /* this routine needs to return the bervals instead of * plain strings, since syntax is not known. It should * also return the syntax or some "comparison cookie". */ if (dnNormalize(0, NULL, NULL, name, &ndn, cp->op->o_tmpmemctx) == LDAP_SUCCESS) { const char *text; AttributeDescription *desc = NULL; if (slap_bv2ad(attr, &desc, &text) == LDAP_SUCCESS) { backend_attribute(cp->op, cp->e, &ndn, desc, &bvals); } sl_free(ndn.bv_val, cp->op->o_tmpmemctx); } return(bvals); } static int aci_match_set ( struct berval *subj, Operation *op, Entry *e, int setref ) { struct berval set = { 0, NULL }; int rc = 0; AciSetCookie cookie; if (setref == 0) { ber_dupbv_x( &set, subj, op->o_tmpmemctx ); } else { struct berval subjdn, ndn = { 0, NULL }; struct berval setat; BerVarray bvals; const char *text; AttributeDescription *desc = NULL; /* format of string is "entry/setAttrName" */ if (aci_get_part(subj, 0, '/', &subjdn) < 0) { return(0); } if ( aci_get_part(subj, 1, '/', &setat) < 0 ) { setat.bv_val = SLAPD_ACI_SET_ATTR; setat.bv_len = sizeof(SLAPD_ACI_SET_ATTR)-1; } if ( setat.bv_val != NULL ) { /* * NOTE: dnNormalize honors the ber_len field * as the length of the dn to be normalized */ if ( dnNormalize(0, NULL, NULL, &subjdn, &ndn, op->o_tmpmemctx) == LDAP_SUCCESS && slap_bv2ad(&setat, &desc, &text) == LDAP_SUCCESS ) { backend_attribute(op, e, &ndn, desc, &bvals); if ( bvals != NULL ) { if ( bvals[0].bv_val != NULL ) { int i; set = bvals[0]; bvals[0].bv_val = NULL; for (i=1;bvals[i].bv_val;i++); bvals[0].bv_val = bvals[i-1].bv_val; bvals[i-1].bv_val = NULL; } ber_bvarray_free_x(bvals, op->o_tmpmemctx); } } if (ndn.bv_val) free(ndn.bv_val); } } if (set.bv_val != NULL) { cookie.op = op; cookie.e = e; rc = (slap_set_filter(aci_set_gather, (SetCookie *)&cookie, &set, &op->o_ndn, &e->e_nname, NULL) > 0); sl_free(set.bv_val, op->o_tmpmemctx); } return(rc); } #ifdef SLAPD_ACI_ENABLED static int aci_list_map_rights( struct berval *list ) { struct berval bv; slap_access_t mask; int i; ACL_INIT(mask); for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) { if (bv.bv_len <= 0) continue; switch (*bv.bv_val) { case 'c': ACL_PRIV_SET(mask, ACL_PRIV_COMPARE); break; case 's': /* **** NOTE: draft-ietf-ldapext-aci-model-0.3.txt defines * the right 's' to mean "set", but in the examples states * that the right 's' means "search". The latter definition * is used here. */ ACL_PRIV_SET(mask, ACL_PRIV_SEARCH); break; case 'r': ACL_PRIV_SET(mask, ACL_PRIV_READ); break; case 'w': ACL_PRIV_SET(mask, ACL_PRIV_WRITE); break; case 'x': /* **** NOTE: draft-ietf-ldapext-aci-model-0.3.txt does not * define any equivalent to the AUTH right, so I've just used * 'x' for now. */ ACL_PRIV_SET(mask, ACL_PRIV_AUTH); break; default: break; } } return(mask); } static int aci_list_has_attr( struct berval *list, const struct berval *attr, struct berval *val ) { struct berval bv, left, right; int i; for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) { if (aci_get_part(&bv, 0, '=', &left) < 0 || aci_get_part(&bv, 1, '=', &right) < 0) { if (ber_bvstrcasecmp(attr, &bv) == 0) return(1); } else if (val == NULL) { if (ber_bvstrcasecmp(attr, &left) == 0) return(1); } else { if (ber_bvstrcasecmp(attr, &left) == 0) { /* this is experimental code that implements a * simple (prefix) match of the attribute value. * the ACI draft does not provide for aci's that * apply to specific values, but it would be * nice to have. If the part of an aci's * rights list is of the form =, * that means the aci applies only to attrs with * the given value. Furthermore, if the attr is * of the form =*, then is * treated as a prefix, and the aci applies to * any value with that prefix. * * Ideally, this would allow r.e. matches. */ if (aci_get_part(&right, 0, '*', &left) < 0 || right.bv_len <= left.bv_len) { if (ber_bvstrcasecmp(val, &right) == 0) return(1); } else if (val->bv_len >= left.bv_len) { if (strncasecmp( val->bv_val, left.bv_val, left.bv_len ) == 0) return(1); } } } } return(0); } static slap_access_t aci_list_get_attr_rights( struct berval *list, const struct berval *attr, struct berval *val ) { struct berval bv; slap_access_t mask; int i; /* loop through each rights/attr pair, skip first part (action) */ ACL_INIT(mask); for (i = 1; aci_get_part(list, i + 1, ';', &bv) >= 0; i += 2) { if (aci_list_has_attr(&bv, attr, val) == 0) continue; if (aci_get_part(list, i, ';', &bv) < 0) continue; mask |= aci_list_map_rights(&bv); } return(mask); } static int aci_list_get_rights( struct berval *list, const struct berval *attr, struct berval *val, slap_access_t *grant, slap_access_t *deny ) { struct berval perm, actn; slap_access_t *mask; int i, found; if (attr == NULL || attr->bv_len == 0 || ber_bvstrcasecmp( attr, &aci_bv_entry ) == 0) { attr = &aci_bv_br_entry; } found = 0; ACL_INIT(*grant); ACL_INIT(*deny); /* loop through each permissions clause */ for (i = 0; aci_get_part(list, i, '$', &perm) >= 0; i++) { if (aci_get_part(&perm, 0, ';', &actn) < 0) continue; if (ber_bvstrcasecmp( &aci_bv_grant, &actn ) == 0) { mask = grant; } else if (ber_bvstrcasecmp( &aci_bv_deny, &actn ) == 0) { mask = deny; } else { continue; } found = 1; *mask |= aci_list_get_attr_rights(&perm, attr, val); *mask |= aci_list_get_attr_rights(&perm, &aci_bv_br_all, NULL); } return(found); } static int aci_group_member ( struct berval *subj, struct berval *defgrpoc, struct berval *defgrpat, Operation *op, Entry *e, regmatch_t *matches ) { struct berval subjdn; struct berval grpoc; struct berval grpat; ObjectClass *grp_oc = NULL; AttributeDescription *grp_ad = NULL; const char *text; int rc; /* format of string is "group/objectClassValue/groupAttrName" */ if (aci_get_part(subj, 0, '/', &subjdn) < 0) { return(0); } if (aci_get_part(subj, 1, '/', &grpoc) < 0) { grpoc = *defgrpoc; } if (aci_get_part(subj, 2, '/', &grpat) < 0) { grpat = *defgrpat; } rc = slap_bv2ad( &grpat, &grp_ad, &text ); if( rc != LDAP_SUCCESS ) { rc = 0; goto done; } rc = 0; grp_oc = oc_bvfind( &grpoc ); if (grp_oc != NULL && grp_ad != NULL ) { char buf[ACL_BUF_SIZE]; struct berval bv, ndn; bv.bv_len = sizeof( buf ) - 1; bv.bv_val = (char *)&buf; string_expand(&bv, &subjdn, e->e_ndn, matches); if ( dnNormalize(0, NULL, NULL, &bv, &ndn, op->o_tmpmemctx) == LDAP_SUCCESS ) { rc = (backend_group(op, e, &ndn, &op->o_ndn, grp_oc, grp_ad) == 0); free( ndn.bv_val ); } } done: return(rc); } static int aci_mask( Operation *op, Entry *e, AttributeDescription *desc, struct berval *val, struct berval *aci, regmatch_t *matches, slap_access_t *grant, slap_access_t *deny, struct berval *scope ) { struct berval bv, perms, sdn; int rc; assert( desc->ad_cname.bv_val != NULL ); /* parse an aci of the form: oid#scope#action;rights;attr;rights;attr$action;rights;attr;rights;attr#dnType#subjectDN See draft-ietf-ldapext-aci-model-04.txt section 9.1 for a full description of the format for this attribute. Differences: "this" in the draft is "self" here, and "self" and "public" is in the position of dnType. For now, this routine only supports scope=entry. */ /* check that the aci has all 5 components */ if (aci_get_part(aci, 4, '#', NULL) < 0) return(0); /* check that the aci family is supported */ if (aci_get_part(aci, 0, '#', &bv) < 0) return(0); /* check that the scope matches */ if (aci_get_part(aci, 1, '#', &bv) < 0 || ber_bvstrcasecmp( scope, &bv ) != 0) { return(0); } /* get the list of permissions clauses, bail if empty */ if (aci_get_part(aci, 2, '#', &perms) <= 0) return(0); /* check if any permissions allow desired access */ if (aci_list_get_rights(&perms, &desc->ad_cname, val, grant, deny) == 0) return(0); /* see if we have a DN match */ if (aci_get_part(aci, 3, '#', &bv) < 0) return(0); if (aci_get_part(aci, 4, '#', &sdn) < 0) return(0); if (ber_bvstrcasecmp( &aci_bv_access_id, &bv ) == 0) { struct berval ndn; rc = 0; if ( dnNormalize(0, NULL, NULL, &sdn, &ndn, op->o_tmpmemctx) == LDAP_SUCCESS ) { if (dn_match( &op->o_ndn, &ndn)) rc = 1; free(ndn.bv_val); } return (rc); } else if (ber_bvstrcasecmp( &aci_bv_public, &bv ) == 0) { return(1); } else if (ber_bvstrcasecmp( &aci_bv_self, &bv ) == 0) { if (dn_match(&op->o_ndn, &e->e_nname)) return(1); } else if (ber_bvstrcasecmp( &aci_bv_dnattr, &bv ) == 0) { Attribute *at; AttributeDescription *ad = NULL; const char *text; rc = slap_bv2ad( &sdn, &ad, &text ); if( rc != LDAP_SUCCESS ) { return 0; } rc = 0; bv = op->o_ndn; for(at = attrs_find( e->e_attrs, ad ); at != NULL; at = attrs_find( at->a_next, ad ) ) { if (value_find_ex( ad, SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH | SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH, at->a_nvals, &bv, op->o_tmpmemctx) == 0 ) { rc = 1; break; } } return rc; } else if (ber_bvstrcasecmp( &aci_bv_group, &bv ) == 0) { if (aci_group_member(&sdn, &aci_bv_group_class, &aci_bv_group_attr, op, e, matches)) return(1); } else if (ber_bvstrcasecmp( &aci_bv_role, &bv ) == 0) { if (aci_group_member(&sdn, &aci_bv_role_class, &aci_bv_role_attr, op, e, matches)) return(1); } else if (ber_bvstrcasecmp( &aci_bv_set, &bv ) == 0) { if (aci_match_set(&sdn, op, e, 0)) return(1); } else if (ber_bvstrcasecmp( &aci_bv_set_ref, &bv ) == 0) { if (aci_match_set(&sdn, op, e, 1)) return(1); } return(0); } #endif /* SLAPD_ACI_ENABLED */ static void string_expand( struct berval *bv, struct berval *pat, char *match, regmatch_t *matches) { ber_len_t size; char *sp; char *dp; int flag; size = 0; bv->bv_val[0] = '\0'; bv->bv_len--; /* leave space for lone $ */ flag = 0; for ( dp = bv->bv_val, sp = pat->bv_val; size < bv->bv_len && sp < pat->bv_val + pat->bv_len ; sp++ ) { /* did we previously see a $ */ if ( flag ) { if ( flag == 1 && *sp == '$' ) { *dp++ = '$'; size++; flag = 0; } else if ( flag == 1 && *sp == '{' /*'}'*/) { flag = 2; } else if ( *sp >= '0' && *sp <= '9' ) { int n; int i; int l; n = *sp - '0'; if ( flag == 2 ) { for ( sp++; *sp != '\0' && *sp != /*'{'*/ '}'; sp++ ) { if ( *sp >= '0' && *sp <= '9' ) { n = 10*n + ( *sp - '0' ); } } if ( *sp != /*'{'*/ '}' ) { /* error */ } } if ( n >= MAXREMATCHES ) { } *dp = '\0'; i = matches[n].rm_so; l = matches[n].rm_eo; for ( ; size < bv->bv_len && i < l; size++, i++ ) { *dp++ = match[i]; } *dp = '\0'; flag = 0; } } else { if (*sp == '$') { flag = 1; } else { *dp++ = *sp; size++; } } } if ( flag ) { /* must have ended with a single $ */ *dp++ = '$'; size++; } *dp = '\0'; bv->bv_len = size; #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL1, "string_expand: pattern = %.*s\n", (int)pat->bv_len, pat->bv_val, 0 ); LDAP_LOG( ACL, DETAIL1, "string_expand: expanded = %s\n", bv->bv_val, 0, 0 ); #else Debug( LDAP_DEBUG_TRACE, "=> string_expand: pattern: %.*s\n", (int)pat->bv_len, pat->bv_val, 0 ); Debug( LDAP_DEBUG_TRACE, "=> string_expand: expanded: %s\n", bv->bv_val, 0, 0 ); #endif } static int regex_matches( struct berval *pat, /* pattern to expand and match against */ char *str, /* string to match against pattern */ char *buf, /* buffer with $N expansion variables */ regmatch_t *matches /* offsets in buffer for $N expansion variables */ ) { regex_t re; char newbuf[ACL_BUF_SIZE]; struct berval bv; int rc; bv.bv_len = sizeof(newbuf) - 1; bv.bv_val = newbuf; if(str == NULL) str = ""; string_expand(&bv, pat, buf, matches); if (( rc = regcomp(&re, newbuf, REG_EXTENDED|REG_ICASE))) { char error[ACL_BUF_SIZE]; regerror(rc, &re, error, sizeof(error)); #ifdef NEW_LOGGING LDAP_LOG( ACL, ERR, "regex_matches: compile( \"%s\", \"%s\") failed %s\n", pat->bv_val, str, error ); #else Debug( LDAP_DEBUG_TRACE, "compile( \"%s\", \"%s\") failed %s\n", pat->bv_val, str, error ); #endif return( 0 ); } rc = regexec(&re, str, 0, NULL, 0); regfree( &re ); #ifdef NEW_LOGGING LDAP_LOG( ACL, DETAIL2, "regex_matches: string: %s\n", str, 0, 0 ); LDAP_LOG( ACL, DETAIL2, "regex_matches: rc: %d %s\n", rc, rc ? "matches" : "no matches", 0 ); #else Debug( LDAP_DEBUG_TRACE, "=> regex_matches: string: %s\n", str, 0, 0 ); Debug( LDAP_DEBUG_TRACE, "=> regex_matches: rc: %d %s\n", rc, !rc ? "matches" : "no matches", 0 ); #endif return( !rc ); }