diff options
Diffstat (limited to 'servers/slapd/acl.c')
| -rw-r--r-- | servers/slapd/acl.c | 2687 |
1 files changed, 2687 insertions, 0 deletions
diff --git a/servers/slapd/acl.c b/servers/slapd/acl.c new file mode 100644 index 0000000..4cfa172 --- /dev/null +++ b/servers/slapd/acl.c @@ -0,0 +1,2687 @@ +/* acl.c - routines to parse and check acl's */ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 1998-2022 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 + * <http://www.OpenLDAP.org/license.html>. + */ +/* 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 <stdio.h> + +#include <ac/regex.h> +#include <ac/socket.h> +#include <ac/string.h> + +#include "slap.h" +#include "sets.h" +#include "lber_pvt.h" +#include "lutil.h" + +#define ACL_BUF_SIZE 1024 /* use most appropriate size */ + +static const struct berval acl_bv_ip_eq = BER_BVC( "IP=" ); +#ifdef LDAP_PF_INET6 +static const struct berval acl_bv_ipv6_eq = BER_BVC( "IP=[" ); +#endif /* LDAP_PF_INET6 */ +#ifdef LDAP_PF_LOCAL +static const struct berval acl_bv_path_eq = BER_BVC("PATH="); +#endif /* LDAP_PF_LOCAL */ + +static AccessControl * slap_acl_get( + AccessControl *ac, int *count, + Operation *op, Entry *e, + AttributeDescription *desc, + struct berval *val, + AclRegexMatches *matches, + slap_mask_t *mask, + AccessControlState *state ); + +static slap_control_t slap_acl_mask( + AccessControl *ac, + AccessControl *prev, + slap_mask_t *mask, + Operation *op, Entry *e, + AttributeDescription *desc, + struct berval *val, + AclRegexMatches *matches, + int count, + AccessControlState *state, + slap_access_t access ); + +static int regex_matches( + struct berval *pat, char *str, + struct berval *dn_matches, struct berval *val_matches, + AclRegexMatches *matches); + +typedef struct AclSetCookie { + SetCookie asc_cookie; +#define asc_op asc_cookie.set_op + Entry *asc_e; +} AclSetCookie; + + +SLAP_SET_GATHER acl_set_gather; +SLAP_SET_GATHER acl_set_gather2; + +/* + * 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 + * slap_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 + * + * Notes: + * - can be legally called with op == NULL + * - can be legally called with op->o_bd == NULL + */ + +int +slap_access_always_allowed( + Operation *op, + Entry *e, + AttributeDescription *desc, + struct berval *val, + slap_access_t access, + AccessControlState *state, + slap_mask_t *maskp ) +{ + assert( maskp != NULL ); + + /* assign all */ + ACL_LVL_ASSIGN_MANAGE( *maskp ); + + return 1; +} + +#define MATCHES_DNMAXCOUNT(m) \ + ( sizeof ( (m)->dn_data ) / sizeof( *(m)->dn_data ) ) +#define MATCHES_VALMAXCOUNT(m) \ + ( sizeof ( (m)->val_data ) / sizeof( *(m)->val_data ) ) +#define MATCHES_MEMSET(m) do { \ + memset( (m)->dn_data, '\0', sizeof( (m)->dn_data ) ); \ + memset( (m)->val_data, '\0', sizeof( (m)->val_data ) ); \ + (m)->dn_count = MATCHES_DNMAXCOUNT( (m) ); \ + (m)->val_count = MATCHES_VALMAXCOUNT( (m) ); \ +} while ( 0 /* CONSTCOND */ ) + +int +slap_access_allowed( + Operation *op, + Entry *e, + AttributeDescription *desc, + struct berval *val, + slap_access_t access, + AccessControlState *state, + slap_mask_t *maskp ) +{ + int ret = 1; + int count; + AccessControl *a, *prev; + +#ifdef LDAP_DEBUG + char accessmaskbuf[ACCESSMASK_MAXLEN]; +#endif + slap_mask_t mask; + slap_control_t control; + slap_access_t access_level; + const char *attr; + AclRegexMatches matches; + AccessControlState acl_state = ACL_STATE_INIT; + static AccessControlState state_init = ACL_STATE_INIT; + + assert( op != NULL ); + assert( e != NULL ); + assert( desc != NULL ); + assert( maskp != NULL ); + + access_level = ACL_LEVEL( access ); + attr = desc->ad_cname.bv_val; + + assert( attr != NULL ); + + ACL_INIT( mask ); + + /* grant database root access */ + if ( be_isroot( op ) ) { + Debug( LDAP_DEBUG_ACL, "<= root access granted\n" ); + mask = ACL_LVL_MANAGE; + goto done; + } + + /* + * no-user-modification operational attributes are ignored + * by ACL_WRITE checking as any found here are not provided + * by the user + * + * NOTE: but they are not ignored for ACL_MANAGE, because + * if we get here it means a non-root user is trying to + * manage data, so we need to check its privileges. + */ + if ( access_level == ACL_WRITE_ + && is_at_no_user_mod( desc->ad_type ) + && desc != slap_schema.si_ad_entry + && desc != slap_schema.si_ad_children ) + { + Debug( LDAP_DEBUG_ACL, "NoUserMod Operational attribute:" + " %s access granted\n", + attr ); + goto done; + } + + /* use backend default access if no backend acls */ + if ( op->o_bd->be_acl == NULL && frontendDB->be_acl == NULL ) { + int i; + + Debug( LDAP_DEBUG_ACL, + "=> slap_access_allowed: backend default %s " + "access %s to \"%s\"\n", + access2str( access ), + op->o_bd->be_dfltaccess >= access_level ? "granted" : "denied", + op->o_dn.bv_val ? op->o_dn.bv_val : "(anonymous)" ); + ret = op->o_bd->be_dfltaccess >= access_level; + + mask = ACL_PRIV_LEVEL; + for ( i = ACL_NONE; i <= op->o_bd->be_dfltaccess; i++ ) { + ACL_PRIV_SET( mask, ACL_ACCESS2PRIV( i ) ); + } + + goto done; + } + + ret = 0; + control = ACL_BREAK; + + if ( state == NULL ) + state = &acl_state; + if ( state->as_desc == desc && + state->as_access == access && + state->as_vd_acl_present ) + { + a = state->as_vd_acl; + count = state->as_vd_acl_count; + if ( state->as_fe_done ) + state->as_fe_done--; + ACL_PRIV_ASSIGN( mask, state->as_vd_mask ); + } else { + *state = state_init; + + a = NULL; + count = 0; + ACL_PRIV_ASSIGN( mask, *maskp ); + } + + MATCHES_MEMSET( &matches ); + prev = a; + + while ( ( a = slap_acl_get( a, &count, op, e, desc, val, + &matches, &mask, state ) ) != NULL ) + { + int i; + int dnmaxcount = MATCHES_DNMAXCOUNT( &matches ); + int valmaxcount = MATCHES_VALMAXCOUNT( &matches ); + regmatch_t *dn_data = matches.dn_data; + regmatch_t *val_data = matches.val_data; + + /* DN matches */ + for ( i = 0; i < dnmaxcount && dn_data[i].rm_eo > 0; i++ ) { + char *data = e->e_ndn; + + Debug( LDAP_DEBUG_ACL, "=> match[dn%d]: %d %d ", i, + (int)dn_data[i].rm_so, + (int)dn_data[i].rm_eo ); + if ( dn_data[i].rm_so <= dn_data[0].rm_eo ) { + int n; + for ( n = dn_data[i].rm_so; + n < dn_data[i].rm_eo; n++ ) { + Debug( LDAP_DEBUG_ACL, "%c", + data[n] ); + } + } + Debug( LDAP_DEBUG_ACL, "\n" ); + } + + /* val matches */ + for ( i = 0; i < valmaxcount && val_data[i].rm_eo > 0; i++ ) { + char *data = val->bv_val; + + Debug( LDAP_DEBUG_ACL, "=> match[val%d]: %d %d ", i, + (int)val_data[i].rm_so, + (int)val_data[i].rm_eo ); + if ( val_data[i].rm_so <= val_data[0].rm_eo ) { + int n; + for ( n = val_data[i].rm_so; + n < val_data[i].rm_eo; n++ ) { + Debug( LDAP_DEBUG_ACL, "%c", + data[n] ); + } + } + Debug( LDAP_DEBUG_ACL, "\n" ); + } + + control = slap_acl_mask( a, prev, &mask, op, + e, desc, val, &matches, count, state, access ); + + if ( control != ACL_BREAK ) { + break; + } + + MATCHES_MEMSET( &matches ); + prev = a; + } + + if ( ACL_IS_INVALID( mask ) ) { + Debug( LDAP_DEBUG_ACL, + "=> slap_access_allowed: \"%s\" (%s) invalid!\n", + e->e_dn, attr ); + ACL_PRIV_ASSIGN( mask, *maskp ); + + } else if ( control == ACL_BREAK ) { + Debug( LDAP_DEBUG_ACL, + "=> slap_access_allowed: no more rules\n" ); + + goto done; + } + + ret = ACL_GRANT( mask, access ); + + Debug( LDAP_DEBUG_ACL, + "=> slap_access_allowed: %s access %s by %s\n", + access2str( access ), ret ? "granted" : "denied", + accessmask2str( mask, accessmaskbuf, 1 ) ); + +done: + ACL_PRIV_ASSIGN( *maskp, mask ); + return ret; +} + +int +fe_access_allowed( + Operation *op, + Entry *e, + AttributeDescription *desc, + struct berval *val, + slap_access_t access, + AccessControlState *state, + slap_mask_t *maskp ) +{ + BackendDB *be_orig; + int rc; + + /* + * NOTE: control gets here if FIXME + * if an appropriate backend cannot be selected for the operation, + * we assume that the frontend should handle this + * FIXME: should select_backend() take care of this, + * and return frontendDB instead of NULL? maybe for some value + * of the flags? + */ + be_orig = op->o_bd; + + if ( op->o_bd == NULL ) { + op->o_bd = select_backend( &op->o_req_ndn, 0 ); + if ( op->o_bd == NULL ) + op->o_bd = frontendDB; + } + rc = slap_access_allowed( op, e, desc, val, access, state, maskp ); + op->o_bd = be_orig; + + return rc; +} + +int +access_allowed_mask( + Operation *op, + Entry *e, + AttributeDescription *desc, + struct berval *val, + slap_access_t access, + AccessControlState *state, + slap_mask_t *maskp ) +{ + int ret = 1; + int be_null = 0; + +#ifdef LDAP_DEBUG + char accessmaskbuf[ACCESSMASK_MAXLEN]; +#endif + slap_mask_t mask; + slap_access_t access_level; + const char *attr; + + assert( e != NULL ); + assert( desc != NULL ); + + access_level = ACL_LEVEL( access ); + + assert( access_level > ACL_NONE ); + + ACL_INIT( mask ); + if ( maskp ) ACL_INVALIDATE( *maskp ); + + attr = desc->ad_cname.bv_val; + + assert( attr != NULL ); + + if ( op ) { + if ( op->o_acl_priv != ACL_NONE ) { + access = op->o_acl_priv; + + } else if ( op->o_is_auth_check && + ( access_level == ACL_SEARCH || access_level == ACL_READ ) ) + { + access = ACL_AUTH; + + } else if ( get_relax( op ) && access_level == ACL_WRITE_ && + desc == slap_schema.si_ad_entry ) + { + access = ACL_MANAGE; + } + } + + if ( state != NULL ) { + if ( state->as_desc == desc && + state->as_access == access && + state->as_result != -1 && + !state->as_vd_acl_present ) + { + Debug( LDAP_DEBUG_ACL, + "=> access_allowed: result was in cache (%s)\n", + attr ); + return state->as_result; + } else { + Debug( LDAP_DEBUG_ACL, + "=> access_allowed: result not in cache (%s)\n", + attr ); + } + } + + Debug( LDAP_DEBUG_ACL, + "=> access_allowed: %s access to \"%s\" \"%s\" requested\n", + access2str( access ), e->e_dn, attr ); + + if ( op == NULL ) { + /* no-op call */ + goto done; + } + + if ( op->o_bd == NULL ) { + op->o_bd = LDAP_STAILQ_FIRST( &backendDB ); + be_null = 1; + + /* FIXME: experimental; use first backend rules + * iff there is no global_acl (ITS#3100) + */ + if ( frontendDB->be_acl != NULL ) { + op->o_bd = frontendDB; + } + } + assert( op->o_bd != NULL ); + + /* this is enforced in backend_add() */ + if ( op->o_bd->bd_info->bi_access_allowed ) { + /* delegate to backend */ + ret = op->o_bd->bd_info->bi_access_allowed( op, e, + desc, val, access, state, &mask ); + + } else { + /* use default (but pass through frontend + * for global ACL overlays) */ + ret = frontendDB->bd_info->bi_access_allowed( op, e, + desc, val, access, state, &mask ); + } + + if ( !ret ) { + if ( ACL_IS_INVALID( mask ) ) { + Debug( LDAP_DEBUG_ACL, + "=> access_allowed: \"%s\" (%s) invalid!\n", + e->e_dn, attr ); + ACL_INIT( mask ); + + } else { + Debug( LDAP_DEBUG_ACL, + "=> access_allowed: no more rules\n" ); + + goto done; + } + } + + Debug( LDAP_DEBUG_ACL, + "=> access_allowed: %s access %s by %s\n", + access2str( access ), ret ? "granted" : "denied", + accessmask2str( mask, accessmaskbuf, 1 ) ); + +done: + if ( state != NULL ) { + state->as_access = access; + state->as_result = ret; + state->as_desc = desc; + } + if ( be_null ) op->o_bd = NULL; + if ( maskp ) ACL_PRIV_ASSIGN( *maskp, mask ); + return ret; +} + + +/* + * slap_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 * +slap_acl_get( + AccessControl *a, + int *count, + Operation *op, + Entry *e, + AttributeDescription *desc, + struct berval *val, + AclRegexMatches *matches, + slap_mask_t *mask, + AccessControlState *state ) +{ + const char *attr; + ber_len_t dnlen; + AccessControl *prev; + + assert( e != NULL ); + assert( count != NULL ); + assert( desc != NULL ); + assert( state != NULL ); + + attr = desc->ad_cname.bv_val; + + assert( attr != NULL ); + + if( a == NULL ) { + if( op->o_bd == NULL || op->o_bd->be_acl == NULL ) { + a = frontendDB->be_acl; + } else { + a = op->o_bd->be_acl; + } + prev = NULL; + + assert( a != NULL ); + if ( a == frontendDB->be_acl ) + state->as_fe_done = 1; + } else { + prev = a; + a = a->acl_next; + } + + dnlen = e->e_nname.bv_len; + + retry: + for ( ; a != NULL; prev = a, a = a->acl_next ) { + (*count) ++; + + if ( a != frontendDB->be_acl && state->as_fe_done ) + state->as_fe_done++; + + if ( a->acl_dn_pat.bv_len || ( a->acl_dn_style != ACL_STYLE_REGEX )) { + if ( a->acl_dn_style == ACL_STYLE_REGEX ) { + Debug( LDAP_DEBUG_ACL, "=> dnpat: [%d] %s nsub: %d\n", + *count, a->acl_dn_pat.bv_val, (int) a->acl_dn_re.re_nsub ); + if ( regexec ( &a->acl_dn_re, + e->e_ndn, + matches->dn_count, + matches->dn_data, 0 ) ) + continue; + + } else { + ber_len_t patlen; + + Debug( LDAP_DEBUG_ACL, "=> dn: [%d] %s\n", + *count, a->acl_dn_pat.bv_val ); + 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 ) { + ber_len_t rdnlen = 0; + ber_len_t sep = 0; + + if ( dnlen <= patlen ) + continue; + + if ( patlen > 0 ) { + if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) ) + continue; + sep = 1; + } + + rdnlen = dn_rdnlen( NULL, &e->e_nname ); + if ( rdnlen + patlen + sep != dnlen ) + 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; + } + + Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] matched\n", + *count ); + } + + if ( a->acl_attrs && !ad_inlist( desc, a->acl_attrs ) ) { + matches->dn_data[0].rm_so = -1; + matches->dn_data[0].rm_eo = -1; + matches->val_data[0].rm_so = -1; + matches->val_data[0].rm_eo = -1; + continue; + } + + /* Is this ACL only for a specific value? */ + if ( a->acl_attrval.bv_val ) { + if ( val == NULL ) { + continue; + } + + if ( !state->as_vd_acl_present ) { + state->as_vd_acl_present = 1; + state->as_vd_acl = prev; + state->as_vd_acl_count = *count - 1; + ACL_PRIV_ASSIGN ( state->as_vd_mask, *mask ); + } + + if ( a->acl_attrval_style == ACL_STYLE_REGEX ) { + Debug( LDAP_DEBUG_ACL, + "acl_get: valpat %s\n", + a->acl_attrval.bv_val ); + if ( regexec ( &a->acl_attrval_re, + val->bv_val, + matches->val_count, + matches->val_data, 0 ) ) + { + continue; + } + + } else { + int match = 0; + const char *text; + Debug( LDAP_DEBUG_ACL, + "acl_get: val %s\n", + a->acl_attrval.bv_val ); + + if ( a->acl_attrs[0].an_desc->ad_type->sat_syntax != slap_schema.si_syn_distinguishedName ) { + if (value_match( &match, desc, + a->acl_attrval_mr, 0, + val, &a->acl_attrval, &text ) != LDAP_SUCCESS || + match ) + continue; + + } else { + ber_len_t patlen, vdnlen; + + patlen = a->acl_attrval.bv_len; + vdnlen = val->bv_len; + + if ( vdnlen < patlen ) + continue; + + if ( a->acl_attrval_style == ACL_STYLE_BASE ) { + if ( vdnlen > patlen ) + continue; + + } else if ( a->acl_attrval_style == ACL_STYLE_ONE ) { + ber_len_t rdnlen = 0; + + if ( !DN_SEPARATOR( val->bv_val[vdnlen - patlen - 1] ) ) + continue; + + rdnlen = dn_rdnlen( NULL, val ); + if ( rdnlen + patlen + 1 != vdnlen ) + continue; + + } else if ( a->acl_attrval_style == ACL_STYLE_SUBTREE ) { + if ( vdnlen > patlen && !DN_SEPARATOR( val->bv_val[vdnlen - patlen - 1] ) ) + continue; + + } else if ( a->acl_attrval_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; + } + } + + Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] attr %s\n", + *count, attr ); + return a; + } + + if ( !state->as_fe_done ) { + state->as_fe_done = 1; + a = frontendDB->be_acl; + goto retry; + } + + Debug( LDAP_DEBUG_ACL, "<= acl_get: done.\n" ); + return( NULL ); +} + +/* + * Record value-dependent access control state + */ +#define ACL_RECORD_VALUE_STATE do { \ + if( state && !state->as_vd_acl_present ) { \ + state->as_vd_acl_present = 1; \ + state->as_vd_acl = prev; \ + state->as_vd_acl_count = count - 1; \ + ACL_PRIV_ASSIGN( state->as_vd_mask, *mask ); \ + } \ + } while( 0 ) + +static int +acl_mask_dn( + Operation *op, + Entry *e, + struct berval *val, + AccessControl *a, + AclRegexMatches *matches, + slap_dn_access *bdn, + struct berval *opndn ) +{ + /* + * 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 + */ + /* + * NOTE: styles "anonymous", "users" and "self" + * have been moved to enum slap_style_t, whose + * value is set in a_dn_style; however, the string + * is maintained in a_dn_pat. + */ + + if ( bdn->a_style == ACL_STYLE_ANONYMOUS ) { + if ( !BER_BVISEMPTY( opndn ) ) { + return 1; + } + + } else if ( bdn->a_style == ACL_STYLE_USERS ) { + if ( BER_BVISEMPTY( opndn ) ) { + return 1; + } + + } else if ( bdn->a_style == ACL_STYLE_SELF ) { + struct berval ndn, selfndn; + int level; + + if ( BER_BVISEMPTY( opndn ) || BER_BVISNULL( &e->e_nname ) ) { + return 1; + } + + level = bdn->a_self_level; + if ( level < 0 ) { + selfndn = *opndn; + ndn = e->e_nname; + level = -level; + + } else { + ndn = *opndn; + selfndn = e->e_nname; + } + + for ( ; level > 0; level-- ) { + if ( BER_BVISEMPTY( &ndn ) ) { + break; + } + dnParent( &ndn, &ndn ); + } + + if ( BER_BVISEMPTY( &ndn ) || !dn_match( &ndn, &selfndn ) ) + { + return 1; + } + + } else if ( bdn->a_style == ACL_STYLE_REGEX ) { + if ( !ber_bvccmp( &bdn->a_pat, '*' ) ) { + AclRegexMatches tmp_matches, + *tmp_matchesp = &tmp_matches; + int rc = 0; + regmatch_t *tmp_data; + + MATCHES_MEMSET( &tmp_matches ); + tmp_data = &tmp_matches.dn_data[0]; + + if ( a->acl_attrval_style == ACL_STYLE_REGEX ) + tmp_matchesp = matches; + else switch ( a->acl_dn_style ) { + case ACL_STYLE_REGEX: + if ( !BER_BVISNULL( &a->acl_dn_pat ) ) { + tmp_matchesp = matches; + break; + } + /* FALLTHRU: applies also to ACL_STYLE_REGEX when pattern is "*" */ + + case ACL_STYLE_BASE: + tmp_data[0].rm_so = 0; + tmp_data[0].rm_eo = e->e_nname.bv_len; + tmp_matches.dn_count = 1; + break; + + case ACL_STYLE_ONE: + case ACL_STYLE_SUBTREE: + case ACL_STYLE_CHILDREN: + tmp_data[0].rm_so = 0; + tmp_data[0].rm_eo = e->e_nname.bv_len; + tmp_data[1].rm_so = e->e_nname.bv_len - a->acl_dn_pat.bv_len; + tmp_data[1].rm_eo = e->e_nname.bv_len; + tmp_matches.dn_count = 2; + break; + + default: + /* error */ + rc = 1; + break; + } + + if ( rc ) { + return 1; + } + + if ( !regex_matches( &bdn->a_pat, opndn->bv_val, + &e->e_nname, NULL, tmp_matchesp ) ) + { + return 1; + } + } + + } else { + struct berval pat; + ber_len_t patlen, odnlen; + int got_match = 0; + + if ( e->e_dn == NULL ) + return 1; + + if ( bdn->a_expand ) { + struct berval bv; + char buf[ACL_BUF_SIZE]; + + AclRegexMatches tmp_matches, + *tmp_matchesp = &tmp_matches; + int rc = 0; + regmatch_t *tmp_data; + + MATCHES_MEMSET( &tmp_matches ); + tmp_data = &tmp_matches.dn_data[0]; + + bv.bv_len = sizeof( buf ) - 1; + bv.bv_val = buf; + + /* Expand value regex */ + if ( a->acl_attrval_style == ACL_STYLE_REGEX ) + tmp_matchesp = matches; + else switch ( a->acl_dn_style ) { + case ACL_STYLE_REGEX: + if ( !BER_BVISNULL( &a->acl_dn_pat ) ) { + tmp_matchesp = matches; + break; + } + /* FALLTHRU: applies also to ACL_STYLE_REGEX when pattern is "*" */ + + case ACL_STYLE_BASE: + tmp_data[0].rm_so = 0; + tmp_data[0].rm_eo = e->e_nname.bv_len; + tmp_matches.dn_count = 1; + break; + + case ACL_STYLE_ONE: + case ACL_STYLE_SUBTREE: + case ACL_STYLE_CHILDREN: + tmp_data[0].rm_so = 0; + tmp_data[0].rm_eo = e->e_nname.bv_len; + tmp_data[1].rm_so = e->e_nname.bv_len - a->acl_dn_pat.bv_len; + tmp_data[1].rm_eo = e->e_nname.bv_len; + tmp_matches.dn_count = 2; + break; + + default: + /* error */ + rc = 1; + break; + } + + if ( rc ) { + return 1; + } + + if ( acl_string_expand( &bv, &bdn->a_pat, + &e->e_nname, + val, tmp_matchesp ) ) + { + return 1; + } + + if ( dnNormalize(0, NULL, NULL, &bv, + &pat, op->o_tmpmemctx ) + != LDAP_SUCCESS ) + { + /* did not expand to a valid dn */ + return 1; + } + + } else { + pat = bdn->a_pat; + } + + patlen = pat.bv_len; + odnlen = opndn->bv_len; + if ( odnlen < patlen ) { + goto dn_match_cleanup; + + } + + if ( bdn->a_style == ACL_STYLE_BASE ) { + /* base dn -- entire object DN must match */ + if ( odnlen != patlen ) { + goto dn_match_cleanup; + } + + } else if ( bdn->a_style == ACL_STYLE_ONE ) { + ber_len_t rdnlen = 0; + + if ( odnlen <= patlen ) { + goto dn_match_cleanup; + } + + if ( !DN_SEPARATOR( opndn->bv_val[odnlen - patlen - 1] ) ) { + goto dn_match_cleanup; + } + + rdnlen = dn_rdnlen( NULL, opndn ); + if ( rdnlen - ( odnlen - patlen - 1 ) != 0 ) { + goto dn_match_cleanup; + } + + } else if ( bdn->a_style == ACL_STYLE_SUBTREE ) { + if ( odnlen > patlen && !DN_SEPARATOR( opndn->bv_val[odnlen - patlen - 1] ) ) { + goto dn_match_cleanup; + } + + } else if ( bdn->a_style == ACL_STYLE_CHILDREN ) { + if ( odnlen <= patlen ) { + goto dn_match_cleanup; + } + + if ( !DN_SEPARATOR( opndn->bv_val[odnlen - patlen - 1] ) ) { + goto dn_match_cleanup; + } + + } else if ( bdn->a_style == ACL_STYLE_LEVEL ) { + int level = bdn->a_level; + struct berval ndn; + + if ( odnlen <= patlen ) { + goto dn_match_cleanup; + } + + if ( level > 0 && !DN_SEPARATOR( opndn->bv_val[odnlen - patlen - 1] ) ) + { + goto dn_match_cleanup; + } + + ndn = *opndn; + for ( ; level > 0; level-- ) { + if ( BER_BVISEMPTY( &ndn ) ) { + goto dn_match_cleanup; + } + dnParent( &ndn, &ndn ); + if ( ndn.bv_len < patlen ) { + goto dn_match_cleanup; + } + } + + if ( ndn.bv_len != patlen ) { + goto dn_match_cleanup; + } + } + + got_match = !strcmp( pat.bv_val, &opndn->bv_val[ odnlen - patlen ] ); + +dn_match_cleanup:; + if ( pat.bv_val != bdn->a_pat.bv_val ) { + slap_sl_free( pat.bv_val, op->o_tmpmemctx ); + } + + if ( !got_match ) { + return 1; + } + } + + return 0; +} + +static int +acl_mask_dnattr( + Operation *op, + Entry *e, + struct berval *val, + AccessControl *a, + int count, + AccessControlState *state, + slap_mask_t *mask, + slap_dn_access *bdn, + struct berval *opndn ) +{ + Attribute *at; + struct berval bv; + int rc, match = 0; + const char *text; + const char *attr = bdn->a_at->ad_cname.bv_val; + + assert( attr != NULL ); + + if ( BER_BVISEMPTY( opndn ) ) { + return 1; + } + + Debug( LDAP_DEBUG_ACL, "<= check a_dn_at: %s\n", attr ); + bv = *opndn; + + /* see if asker is listed in dnattr */ + for ( at = attrs_find( e->e_attrs, bdn->a_at ); + at != NULL; + at = attrs_find( at->a_next, bdn->a_at ) ) + { + if ( attr_valfind( at, + SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH | + SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH, + &bv, NULL, 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 ( bdn->a_self ) { + /* check if the target is an attribute. */ + if ( val == NULL ) return 1; + + /* target is attribute, check if the attribute value + * is the op dn. + */ + rc = value_match( &match, bdn->a_at, + bdn->a_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 ) + return 1; + } + + } else { + /* no dnattr match, check if this is a self clause */ + if ( ! bdn->a_self ) + return 1; + + /* this is a self clause, check if the target is an + * attribute. + */ + if ( val == NULL ) + return 1; + + /* target is attribute, check if the attribute value + * is the op dn. + */ + rc = value_match( &match, bdn->a_at, + bdn->a_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 ) + return 1; + } + + return 0; +} + + +/* + * slap_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 +slap_acl_mask( + AccessControl *a, + AccessControl *prev, + slap_mask_t *mask, + Operation *op, + Entry *e, + AttributeDescription *desc, + struct berval *val, + AclRegexMatches *matches, + int count, + AccessControlState *state, + slap_access_t access ) +{ + int i; + Access *b; +#ifdef LDAP_DEBUG + char accessmaskbuf[ACCESSMASK_MAXLEN]; +#endif /* DEBUG */ + const char *attr; +#ifdef SLAP_DYNACL + slap_mask_t a2pmask = ACL_ACCESS2PRIV( access ); +#endif /* SLAP_DYNACL */ + + assert( a != NULL ); + assert( mask != NULL ); + assert( desc != NULL ); + + attr = desc->ad_cname.bv_val; + + assert( attr != NULL ); + + Debug( LDAP_DEBUG_ACL, + "=> acl_mask: access to entry \"%s\", attr \"%s\" requested\n", + e->e_dn, attr ); + + 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, 1 ) ); + + + b = a->acl_access; + i = 1; + + for ( ; b != NULL; b = b->a_next, i++ ) { + slap_mask_t oldmask, modmask; + + ACL_INVALIDATE( modmask ); + + /* check for the "self" modifier in the <access> field */ + if ( b->a_dn.a_self ) { + const char *dummy; + int rc, match = 0; + + ACL_RECORD_VALUE_STATE; + + /* must have DN syntax */ + if ( desc->ad_type->sat_syntax != slap_schema.si_syn_distinguishedName && + !is_at_syntax( desc->ad_type, SLAPD_NAMEUID_SYNTAX )) continue; + + /* check if the target is an attribute. */ + if ( val == NULL ) continue; + + /* a DN must be present */ + if ( BER_BVISEMPTY( &op->o_ndn ) ) { + continue; + } + + /* target is attribute, check if the attribute value + * is the op dn. + */ + rc = value_match( &match, desc, + desc->ad_type->sat_equality, 0, + val, &op->o_ndn, &dummy ); + /* on match error or no match, fail the ACL clause */ + if ( rc != LDAP_SUCCESS || match != 0 ) + continue; + } + + /* AND <who> clauses */ + if ( !BER_BVISEMPTY( &b->a_dn_pat ) ) { + Debug( LDAP_DEBUG_ACL, "<= check a_dn_pat: %s\n", + b->a_dn_pat.bv_val ); + /* + * 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 + */ + /* + * NOTE: styles "anonymous", "users" and "self" + * have been moved to enum slap_style_t, whose + * value is set in a_dn_style; however, the string + * is maintained in a_dn_pat. + */ + + if ( acl_mask_dn( op, e, val, a, matches, + &b->a_dn, &op->o_ndn ) ) + { + continue; + } + } + + if ( !BER_BVISEMPTY( &b->a_realdn_pat ) ) { + struct berval ndn; + + Debug( LDAP_DEBUG_ACL, "<= check a_realdn_pat: %s\n", + b->a_realdn_pat.bv_val ); + /* + * 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 + */ + /* + * NOTE: styles "anonymous", "users" and "self" + * have been moved to enum slap_style_t, whose + * value is set in a_dn_style; however, the string + * is maintained in a_dn_pat. + */ + + if ( op->o_conn && !BER_BVISNULL( &op->o_conn->c_ndn ) ) + { + ndn = op->o_conn->c_ndn; + } else { + ndn = op->o_ndn; + } + + if ( acl_mask_dn( op, e, val, a, matches, + &b->a_realdn, &ndn ) ) + { + continue; + } + } + + if ( !BER_BVISEMPTY( &b->a_sockurl_pat ) ) { + if ( ! op->o_conn->c_listener ) { + continue; + } + Debug( LDAP_DEBUG_ACL, "<= check a_sockurl_pat: %s\n", + b->a_sockurl_pat.bv_val ); + + 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_nname, val, 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; + if ( acl_string_expand( &bv, &b->a_sockurl_pat, &e->e_nname, val, matches ) ) + { + continue; + } + + 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 ( !BER_BVISEMPTY( &b->a_domain_pat ) ) { + if ( !op->o_conn->c_peer_domain.bv_val ) { + continue; + } + Debug( LDAP_DEBUG_ACL, "<= check a_domain_pat: %s\n", + b->a_domain_pat.bv_val ); + 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_nname, val, 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; + + if ( acl_string_expand(&bv, &b->a_domain_pat, &e->e_nname, val, matches) ) + { + continue; + } + 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 ( !BER_BVISEMPTY( &b->a_peername_pat ) ) { + if ( !op->o_conn->c_peer_name.bv_val ) { + continue; + } + Debug( LDAP_DEBUG_ACL, "<= check a_peername_path: %s\n", + b->a_peername_pat.bv_val ); + 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_nname, val, 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; + if ( acl_string_expand( &bv, &b->a_peername_pat, &e->e_nname, val, matches ) ) + { + continue; + } + + 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[STRLENOF("255.255.255.255") + 1]; + struct berval ip; + unsigned long addr; + int port_number = -1; + + if ( strncasecmp( op->o_conn->c_peer_name.bv_val, + acl_bv_ip_eq.bv_val, + acl_bv_ip_eq.bv_len ) != 0 ) + continue; + + ip.bv_val = op->o_conn->c_peer_name.bv_val + acl_bv_ip_eq.bv_len; + ip.bv_len = op->o_conn->c_peer_name.bv_len - acl_bv_ip_eq.bv_len; + + port = strrchr( ip.bv_val, ':' ); + if ( port ) { + ip.bv_len = port - ip.bv_val; + ++port; + if ( lutil_atoi( &port_number, port ) != 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_INET6 + /* extract IPv6 and try exact match */ + } else if ( b->a_peername_style == ACL_STYLE_IPV6 ) { + char *port; + char buf[STRLENOF("FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF") + 1]; + struct berval ip; + struct in6_addr addr; + int port_number = -1; + + if ( strncasecmp( op->o_conn->c_peer_name.bv_val, + acl_bv_ipv6_eq.bv_val, + acl_bv_ipv6_eq.bv_len ) != 0 ) + continue; + + ip.bv_val = op->o_conn->c_peer_name.bv_val + acl_bv_ipv6_eq.bv_len; + ip.bv_len = op->o_conn->c_peer_name.bv_len - acl_bv_ipv6_eq.bv_len; + + port = strrchr( ip.bv_val, ']' ); + if ( port ) { + ip.bv_len = port - ip.bv_val; + ++port; + if ( port[0] == ':' && lutil_atoi( &port_number, ++port ) != 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'; + + if ( inet_pton( AF_INET6, buf, &addr ) != 1 ) + continue; + + /* check mask */ + if ( !slap_addr6_mask( &addr, &b->a_peername_mask6, &b->a_peername_addr6 ) ) + continue; +#endif /* LDAP_PF_INET6 */ + +#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, + acl_bv_path_eq.bv_val, + acl_bv_path_eq.bv_len ) != 0 ) + continue; + + path.bv_val = op->o_conn->c_peer_name.bv_val + + acl_bv_path_eq.bv_len; + path.bv_len = op->o_conn->c_peer_name.bv_len + - acl_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 ( !BER_BVISEMPTY( &b->a_sockname_pat ) ) { + if ( BER_BVISNULL( &op->o_conn->c_sock_name ) ) { + continue; + } + Debug( LDAP_DEBUG_ACL, "<= check a_sockname_path: %s\n", + b->a_sockname_pat.bv_val ); + 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_nname, val, 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; + if ( acl_string_expand( &bv, &b->a_sockname_pat, &e->e_nname, val, matches ) ) + { + continue; + } + + 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 ) { + if ( acl_mask_dnattr( op, e, val, a, + count, state, mask, + &b->a_dn, &op->o_ndn ) ) + { + continue; + } + } + + if ( b->a_realdn_at != NULL ) { + struct berval ndn; + + if ( op->o_conn && !BER_BVISNULL( &op->o_conn->c_ndn ) ) + { + ndn = op->o_conn->c_ndn; + } else { + ndn = op->o_ndn; + } + + if ( acl_mask_dnattr( op, e, val, a, + count, state, mask, + &b->a_realdn, &ndn ) ) + { + continue; + } + } + + if ( !BER_BVISEMPTY( &b->a_group_pat ) ) { + struct berval bv; + struct berval ndn = BER_BVNULL; + int rc; + + if ( op->o_ndn.bv_len == 0 ) { + continue; + } + + Debug( LDAP_DEBUG_ACL, "<= check a_group_pat: %s\n", + b->a_group_pat.bv_val ); + + /* 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]; + AclRegexMatches tmp_matches, + *tmp_matchesp = &tmp_matches; + regmatch_t *tmp_data; + + MATCHES_MEMSET( &tmp_matches ); + tmp_data = &tmp_matches.dn_data[0]; + + bv.bv_len = sizeof(buf) - 1; + bv.bv_val = buf; + + rc = 0; + + if ( a->acl_attrval_style == ACL_STYLE_REGEX ) + tmp_matchesp = matches; + else switch ( a->acl_dn_style ) { + case ACL_STYLE_REGEX: + if ( !BER_BVISNULL( &a->acl_dn_pat ) ) { + tmp_matchesp = matches; + break; + } + + /* FALLTHRU: applies also to ACL_STYLE_REGEX when pattern is "*" */ + case ACL_STYLE_BASE: + tmp_data[0].rm_so = 0; + tmp_data[0].rm_eo = e->e_nname.bv_len; + tmp_matches.dn_count = 1; + break; + + case ACL_STYLE_ONE: + case ACL_STYLE_SUBTREE: + case ACL_STYLE_CHILDREN: + tmp_data[0].rm_so = 0; + tmp_data[0].rm_eo = e->e_nname.bv_len; + + tmp_data[1].rm_so = e->e_nname.bv_len - a->acl_dn_pat.bv_len; + tmp_data[1].rm_eo = e->e_nname.bv_len; + tmp_matches.dn_count = 2; + break; + + default: + /* error */ + rc = 1; + break; + } + + if ( rc ) { + continue; + } + + if ( acl_string_expand( &bv, &b->a_group_pat, + &e->e_nname, val, + tmp_matchesp ) ) + { + continue; + } + + 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 ) { + slap_sl_free( ndn.bv_val, op->o_tmpmemctx ); + } + + if ( rc != 0 ) { + continue; + } + } + + if ( !BER_BVISEMPTY( &b->a_set_pat ) ) { + struct berval bv; + char buf[ACL_BUF_SIZE]; + + Debug( LDAP_DEBUG_ACL, "<= check a_set_pat: %s\n", + b->a_set_pat.bv_val ); + + if ( b->a_set_style == ACL_STYLE_EXPAND ) { + AclRegexMatches tmp_matches, + *tmp_matchesp = &tmp_matches; + int rc = 0; + regmatch_t *tmp_data; + + MATCHES_MEMSET( &tmp_matches ); + tmp_data = &tmp_matches.dn_data[0]; + + bv.bv_len = sizeof( buf ) - 1; + bv.bv_val = buf; + + rc = 0; + + if ( a->acl_attrval_style == ACL_STYLE_REGEX ) + tmp_matchesp = matches; + else switch ( a->acl_dn_style ) { + case ACL_STYLE_REGEX: + if ( !BER_BVISNULL( &a->acl_dn_pat ) ) { + tmp_matchesp = matches; + break; + } + + /* FALLTHRU: applies also to ACL_STYLE_REGEX when pattern is "*" */ + case ACL_STYLE_BASE: + tmp_data[0].rm_so = 0; + tmp_data[0].rm_eo = e->e_nname.bv_len; + tmp_matches.dn_count = 1; + break; + + case ACL_STYLE_ONE: + case ACL_STYLE_SUBTREE: + case ACL_STYLE_CHILDREN: + tmp_data[0].rm_so = 0; + tmp_data[0].rm_eo = e->e_nname.bv_len; + tmp_data[1].rm_so = e->e_nname.bv_len - a->acl_dn_pat.bv_len; + tmp_data[1].rm_eo = e->e_nname.bv_len; tmp_matches.dn_count = 2; + break; + + default: + /* error */ + rc = 1; + break; + } + + if ( rc ) { + continue; + } + + if ( acl_string_expand( &bv, &b->a_set_pat, + &e->e_nname, val, + tmp_matchesp ) ) + { + continue; + } + + } else { + bv = b->a_set_pat; + } + + if ( acl_match_set( &bv, op, e, NULL ) == 0 ) { + continue; + } + } + + if ( b->a_authz.sai_ssf ) { + Debug( LDAP_DEBUG_ACL, "<= check a_authz.sai_ssf: ACL %u > OP %u\n", + b->a_authz.sai_ssf, op->o_ssf ); + if ( b->a_authz.sai_ssf > op->o_ssf ) { + continue; + } + } + + if ( b->a_authz.sai_transport_ssf ) { + 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 ); + if ( b->a_authz.sai_transport_ssf > op->o_transport_ssf ) { + continue; + } + } + + if ( b->a_authz.sai_tls_ssf ) { + 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 ); + if ( b->a_authz.sai_tls_ssf > op->o_tls_ssf ) { + continue; + } + } + + if ( b->a_authz.sai_sasl_ssf ) { + 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 ); + if ( b->a_authz.sai_sasl_ssf > op->o_sasl_ssf ) { + continue; + } + } + +#ifdef SLAP_DYNACL + if ( b->a_dynacl ) { + slap_dynacl_t *da; + slap_access_t tgrant, tdeny; + + Debug( LDAP_DEBUG_ACL, "<= check a_dynacl\n" ); + + /* this case works different from the others above. + * since dynamic ACL's themselves give permissions, we need + * to first check b->a_access_mask, the ACL's access level. + */ + /* first check if the right being requested + * is allowed by the ACL clause. + */ + if ( ! ACL_PRIV_ISSET( b->a_access_mask, a2pmask ) ) { + continue; + } + + /* start out with nothing granted, nothing denied */ + ACL_INVALIDATE(tgrant); + ACL_INVALIDATE(tdeny); + + for ( da = b->a_dynacl; da; da = da->da_next ) { + slap_access_t grant, + deny; + + ACL_INVALIDATE(grant); + ACL_INVALIDATE(deny); + + Debug( LDAP_DEBUG_ACL, " <= check a_dynacl: %s\n", + da->da_name ); + + /* + * XXXmanu Only DN matches are supplied + * sending attribute values matches require + * an API update + */ + (void)da->da_mask( da->da_private, op, e, desc, + val, matches->dn_count, matches->dn_data, + &grant, &deny ); + + tgrant |= grant; + tdeny |= deny; + } + + /* 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 slap_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 /* SLAP_DYNACL */ + { + modmask = b->a_access_mask; + } + + Debug( LDAP_DEBUG_ACL, + "<= acl_mask: [%d] applying %s (%s)\n", + i, accessmask2str( modmask, accessmaskbuf, 1 ), + b->a_type == ACL_CONTINUE + ? "continue" + : b->a_type == ACL_BREAK + ? "break" + : "stop" ); + /* 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) ) { + /* subtract privs */ + ACL_PRIV_CLR( *mask, modmask ); + + /* cleanup */ + ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK ); + + } else { + /* assign privs */ + *mask = modmask; + } + + Debug( LDAP_DEBUG_ACL, + "<= acl_mask: [%d] mask: %s\n", + i, accessmask2str(*mask, accessmaskbuf, 1) ); + + 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); + + Debug( LDAP_DEBUG_ACL, + "<= acl_mask: no more <who> clauses, returning %s (stop)\n", + accessmask2str(*mask, accessmaskbuf, 1) ); + 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 = LDAP_STAILQ_FIRST(&backendDB); + be_null = 1; + op->o_bd = be; + } + assert( be != NULL ); + + /* If ADD attribute checking is not enabled, just allow it */ + if ( op->o_tag == LDAP_REQ_ADD && !SLAP_DBACL_ADD( be )) + return 1; + + /* short circuit root database access */ + if ( be_isroot( op ) ) { + Debug( LDAP_DEBUG_ACL, + "<= acl_access_allowed: granted to database root\n" ); + goto done; + } + + /* use backend default access if no backend acls */ + if( op->o_bd != NULL && op->o_bd->be_acl == NULL && frontendDB->be_acl == NULL ) { + 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 ); + ret = (op->o_bd->be_dfltaccess >= ACL_WRITE); + goto done; + } + + for ( ; mlist != NULL; mlist = mlist->sml_next ) { + /* + * Internal mods are ignored by ACL_WRITE checking + */ + if ( mlist->sml_flags & SLAP_MOD_INTERNAL ) { + Debug( LDAP_DEBUG_ACL, "acl: internal mod %s:" + " modify access granted\n", + mlist->sml_desc->ad_cname.bv_val ); + continue; + } + + /* + * 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 ) + && ! ( mlist->sml_flags & SLAP_MOD_MANAGING ) ) + { + Debug( LDAP_DEBUG_ACL, "acl: no-user-mod %s:" + " modify access granted\n", + mlist->sml_desc->ad_cname.bv_val ); + continue; + } + + switch ( mlist->sml_op ) { + case LDAP_MOD_REPLACE: + case LDAP_MOD_INCREMENT: + /* + * 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, + ( mlist->sml_flags & SLAP_MOD_MANAGING ) ? ACL_MANAGE : ACL_WDEL, + &state ) ) + { + ret = 0; + goto done; + } + + if ( mlist->sml_values == NULL ) break; + + /* fall thru to check value to add */ + + case LDAP_MOD_ADD: + case SLAP_MOD_ADD_IF_NOT_PRESENT: + assert( mlist->sml_values != NULL ); + + if ( mlist->sml_op == SLAP_MOD_ADD_IF_NOT_PRESENT + && attr_find( e->e_attrs, mlist->sml_desc ) ) + { + 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, + ( mlist->sml_flags & SLAP_MOD_MANAGING ) ? ACL_MANAGE : ACL_WADD, + &state ) ) + { + ret = 0; + goto done; + } + } + break; + + case LDAP_MOD_DELETE: + case SLAP_MOD_SOFTDEL: + if ( mlist->sml_values == NULL ) { + if ( ! access_allowed( op, e, + mlist->sml_desc, NULL, + ( mlist->sml_flags & SLAP_MOD_MANAGING ) ? ACL_MANAGE : ACL_WDEL, + &state ) ) + { + 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, + ( mlist->sml_flags & SLAP_MOD_MANAGING ) ? ACL_MANAGE : ACL_WDEL, + &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 ); +} + +int +acl_get_part( + struct berval *list, + int ix, + char sep, + struct berval *bv ) +{ + int len; + char *p; + + if ( bv ) { + BER_BVZERO( bv ); + } + 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; +} + +typedef struct acl_set_gather_t { + SetCookie *cookie; + BerVarray bvals; +} acl_set_gather_t; + +static int +acl_set_cb_gather( Operation *op, SlapReply *rs ) +{ + acl_set_gather_t *p = (acl_set_gather_t *)op->o_callback->sc_private; + + if ( rs->sr_type == REP_SEARCH ) { + BerValue bvals[ 2 ]; + BerVarray bvalsp = NULL; + int j; + + for ( j = 0; !BER_BVISNULL( &rs->sr_attrs[ j ].an_name ); j++ ) { + AttributeDescription *desc = rs->sr_attrs[ j ].an_desc; + + if ( desc == NULL ) { + continue; + } + + if ( desc == slap_schema.si_ad_entryDN ) { + bvalsp = bvals; + bvals[ 0 ] = rs->sr_entry->e_nname; + BER_BVZERO( &bvals[ 1 ] ); + + } else { + Attribute *a; + + a = attr_find( rs->sr_entry->e_attrs, desc ); + if ( a != NULL ) { + bvalsp = a->a_nvals; + } + } + + if ( bvalsp ) { + p->bvals = slap_set_join( p->cookie, p->bvals, + ( '|' | SLAP_SET_RREF ), bvalsp ); + } + } + + } else { + switch ( rs->sr_type ) { + case REP_SEARCHREF: + case REP_INTERMEDIATE: + /* ignore */ + break; + + default: + assert( rs->sr_type == REP_RESULT ); + break; + } + } + + return 0; +} + +BerVarray +acl_set_gather( SetCookie *cookie, struct berval *name, AttributeDescription *desc ) +{ + AclSetCookie *cp = (AclSetCookie *)cookie; + int rc = 0; + LDAPURLDesc *ludp = NULL; + Operation op2 = { 0 }; + SlapReply rs = {REP_RESULT}; + AttributeName anlist[ 2 ], *anlistp = NULL; + int nattrs = 0; + slap_callback cb = { NULL, acl_set_cb_gather, NULL, NULL }; + acl_set_gather_t p = { 0 }; + + /* 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 ( strncasecmp( name->bv_val, "ldap:///", STRLENOF( "ldap:///" ) ) != 0 ) { + return acl_set_gather2( cookie, name, desc ); + } + + rc = ldap_url_parse( name->bv_val, &ludp ); + if ( rc != LDAP_URL_SUCCESS ) { + Debug( LDAP_DEBUG_TRACE, + "%s acl_set_gather: unable to parse URL=\"%s\"\n", + cp->asc_op->o_log_prefix, name->bv_val ); + + rc = LDAP_PROTOCOL_ERROR; + goto url_done; + } + + if ( ( ludp->lud_host && ludp->lud_host[0] ) || ludp->lud_exts ) + { + /* host part must be empty */ + /* extensions parts must be empty */ + Debug( LDAP_DEBUG_TRACE, + "%s acl_set_gather: host/exts must be absent in URL=\"%s\"\n", + cp->asc_op->o_log_prefix, name->bv_val ); + + rc = LDAP_PROTOCOL_ERROR; + goto url_done; + } + + /* Grab the searchbase and see if an appropriate database can be found */ + ber_str2bv( ludp->lud_dn, 0, 0, &op2.o_req_dn ); + rc = dnNormalize( 0, NULL, NULL, &op2.o_req_dn, + &op2.o_req_ndn, cp->asc_op->o_tmpmemctx ); + BER_BVZERO( &op2.o_req_dn ); + if ( rc != LDAP_SUCCESS ) { + Debug( LDAP_DEBUG_TRACE, + "%s acl_set_gather: DN=\"%s\" normalize failed\n", + cp->asc_op->o_log_prefix, ludp->lud_dn ); + + goto url_done; + } + + op2.o_bd = select_backend( &op2.o_req_ndn, 1 ); + if ( ( op2.o_bd == NULL ) || ( op2.o_bd->be_search == NULL ) ) { + Debug( LDAP_DEBUG_TRACE, + "%s acl_set_gather: no database could be selected for DN=\"%s\"\n", + cp->asc_op->o_log_prefix, op2.o_req_ndn.bv_val ); + + rc = LDAP_NO_SUCH_OBJECT; + goto url_done; + } + + /* Grab the filter */ + if ( ludp->lud_filter ) { + ber_str2bv_x( ludp->lud_filter, 0, 0, &op2.ors_filterstr, + cp->asc_op->o_tmpmemctx ); + op2.ors_filter = str2filter_x( cp->asc_op, op2.ors_filterstr.bv_val ); + if ( op2.ors_filter == NULL ) { + Debug( LDAP_DEBUG_TRACE, + "%s acl_set_gather: unable to parse filter=\"%s\"\n", + cp->asc_op->o_log_prefix, op2.ors_filterstr.bv_val ); + + rc = LDAP_PROTOCOL_ERROR; + goto url_done; + } + + } else { + op2.ors_filterstr = *slap_filterstr_objectClass_pres; + op2.ors_filter = (Filter *)slap_filter_objectClass_pres; + } + + + /* Grab the scope */ + op2.ors_scope = ludp->lud_scope; + + /* Grap the attributes */ + if ( ludp->lud_attrs ) { + int i; + + for ( ; ludp->lud_attrs[ nattrs ]; nattrs++ ) + ; + + anlistp = slap_sl_calloc( sizeof( AttributeName ), nattrs + 2, + cp->asc_op->o_tmpmemctx ); + + for ( i = 0, nattrs = 0; ludp->lud_attrs[ i ]; i++ ) { + struct berval name; + AttributeDescription *desc = NULL; + const char *text = NULL; + + ber_str2bv( ludp->lud_attrs[ i ], 0, 0, &name ); + rc = slap_bv2ad( &name, &desc, &text ); + if ( rc == LDAP_SUCCESS ) { + anlistp[ nattrs ].an_name = name; + anlistp[ nattrs ].an_desc = desc; + nattrs++; + } + } + + } else { + anlistp = anlist; + } + + anlistp[ nattrs ].an_name = desc->ad_cname; + anlistp[ nattrs ].an_desc = desc; + + BER_BVZERO( &anlistp[ nattrs + 1 ].an_name ); + + p.cookie = cookie; + + op2.o_hdr = cp->asc_op->o_hdr; + op2.o_tag = LDAP_REQ_SEARCH; + op2.o_ndn = op2.o_bd->be_rootndn; + op2.o_callback = &cb; + slap_op_time( &op2.o_time, &op2.o_tincr ); + op2.o_do_not_cache = 1; + op2.o_is_auth_check = 0; + ber_dupbv_x( &op2.o_req_dn, &op2.o_req_ndn, cp->asc_op->o_tmpmemctx ); + op2.ors_slimit = SLAP_NO_LIMIT; + op2.ors_tlimit = SLAP_NO_LIMIT; + op2.ors_attrs = anlistp; + op2.ors_attrsonly = 0; + op2.o_private = cp->asc_op->o_private; + op2.o_extra = cp->asc_op->o_extra; + + cb.sc_private = &p; + + rc = op2.o_bd->be_search( &op2, &rs ); + if ( rc != 0 ) { + goto url_done; + } + +url_done:; + if ( op2.ors_filter && op2.ors_filter != slap_filter_objectClass_pres ) { + filter_free_x( cp->asc_op, op2.ors_filter, 1 ); + } + if ( !BER_BVISNULL( &op2.o_req_ndn ) ) { + slap_sl_free( op2.o_req_ndn.bv_val, cp->asc_op->o_tmpmemctx ); + } + if ( !BER_BVISNULL( &op2.o_req_dn ) ) { + slap_sl_free( op2.o_req_dn.bv_val, cp->asc_op->o_tmpmemctx ); + } + if ( ludp ) { + ldap_free_urldesc( ludp ); + } + if ( anlistp && anlistp != anlist ) { + slap_sl_free( anlistp, cp->asc_op->o_tmpmemctx ); + } + + return p.bvals; +} + +BerVarray +acl_set_gather2( SetCookie *cookie, struct berval *name, AttributeDescription *desc ) +{ + AclSetCookie *cp = (AclSetCookie *)cookie; + BerVarray bvals = NULL; + struct berval ndn; + int rc = 0; + + /* 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". + */ + rc = dnNormalize( 0, NULL, NULL, name, &ndn, cp->asc_op->o_tmpmemctx ); + if ( rc == LDAP_SUCCESS ) { + if ( desc == slap_schema.si_ad_entryDN ) { + bvals = (BerVarray)slap_sl_malloc( sizeof( BerValue ) * 2, + cp->asc_op->o_tmpmemctx ); + bvals[ 0 ] = ndn; + BER_BVZERO( &bvals[ 1 ] ); + BER_BVZERO( &ndn ); + + } else { + backend_attribute( cp->asc_op, + cp->asc_e, &ndn, desc, &bvals, ACL_NONE ); + } + + if ( !BER_BVISNULL( &ndn ) ) { + slap_sl_free( ndn.bv_val, cp->asc_op->o_tmpmemctx ); + } + } + + return bvals; +} + +int +acl_match_set ( + struct berval *subj, + Operation *op, + Entry *e, + struct berval *default_set_attribute ) +{ + struct berval set = BER_BVNULL; + int rc = 0; + AclSetCookie cookie; + + if ( default_set_attribute == NULL ) { + set = *subj; + + } else { + struct berval subjdn, ndn = BER_BVNULL; + struct berval setat; + BerVarray bvals = NULL; + const char *text; + AttributeDescription *desc = NULL; + + /* format of string is "entry/setAttrName" */ + if ( acl_get_part( subj, 0, '/', &subjdn ) < 0 ) { + return 0; + } + + if ( acl_get_part( subj, 1, '/', &setat ) < 0 ) { + setat = *default_set_attribute; + } + + /* + * NOTE: dnNormalize honors the ber_len field + * as the length of the dn to be normalized + */ + if ( slap_bv2ad( &setat, &desc, &text ) == LDAP_SUCCESS ) { + if ( dnNormalize( 0, NULL, NULL, &subjdn, &ndn, op->o_tmpmemctx ) == LDAP_SUCCESS ) + { + backend_attribute( op, e, &ndn, desc, &bvals, ACL_NONE ); + if ( bvals != NULL && !BER_BVISNULL( &bvals[0] ) ) { + int i; + + set = bvals[0]; + BER_BVZERO( &bvals[0] ); + for ( i = 1; !BER_BVISNULL( &bvals[i] ); i++ ) + /* count */ ; + bvals[0].bv_val = bvals[i-1].bv_val; + BER_BVZERO( &bvals[i-1] ); + } + ber_bvarray_free_x( bvals, op->o_tmpmemctx ); + slap_sl_free( ndn.bv_val, op->o_tmpmemctx ); + } + } + } + + if ( !BER_BVISNULL( &set ) ) { + cookie.asc_op = op; + cookie.asc_e = e; + rc = ( slap_set_filter( + acl_set_gather, + (SetCookie *)&cookie, &set, + &op->o_ndn, &e->e_nname, NULL ) > 0 ); + if ( set.bv_val != subj->bv_val ) { + slap_sl_free( set.bv_val, op->o_tmpmemctx ); + } + } + + return(rc); +} + +#ifdef SLAP_DYNACL + +/* + * dynamic ACL infrastructure + */ +static slap_dynacl_t *da_list = NULL; + +int +slap_dynacl_register( slap_dynacl_t *da ) +{ + slap_dynacl_t *tmp; + + for ( tmp = da_list; tmp; tmp = tmp->da_next ) { + if ( strcasecmp( da->da_name, tmp->da_name ) == 0 ) { + break; + } + } + + if ( tmp != NULL ) { + return -1; + } + + if ( da->da_mask == NULL ) { + return -1; + } + + da->da_private = NULL; + da->da_next = da_list; + da_list = da; + + return 0; +} + +static slap_dynacl_t * +slap_dynacl_next( slap_dynacl_t *da ) +{ + if ( da ) { + return da->da_next; + } + return da_list; +} + +slap_dynacl_t * +slap_dynacl_get( const char *name ) +{ + slap_dynacl_t *da; + + for ( da = slap_dynacl_next( NULL ); da; da = slap_dynacl_next( da ) ) { + if ( strcasecmp( da->da_name, name ) == 0 ) { + break; + } + } + + return da; +} +#endif /* SLAP_DYNACL */ + +/* + * statically built-in dynamic ACL initialization + */ +static int (*acl_init_func[])( void ) = { +#ifdef SLAP_DYNACL + /* TODO: remove when ACI will only be dynamic */ +#if SLAPD_ACI_ENABLED == SLAPD_MOD_STATIC + dynacl_aci_init, +#endif /* SLAPD_ACI_ENABLED */ +#endif /* SLAP_DYNACL */ + + NULL +}; + +int +acl_init( void ) +{ + int i, rc; + + for ( i = 0; acl_init_func[ i ] != NULL; i++ ) { + rc = (*(acl_init_func[ i ]))(); + if ( rc != 0 ) { + return rc; + } + } + + return 0; +} + +int +acl_string_expand( + struct berval *bv, + struct berval *pat, + struct berval *dn_matches, + struct berval *val_matches, + AclRegexMatches *matches) +{ + ber_len_t size; + char *sp; + char *dp; + int flag; + enum { DN_FLAG, VAL_FLAG } tflag; + + size = 0; + bv->bv_val[0] = '\0'; + bv->bv_len--; /* leave space for lone $ */ + + flag = 0; + tflag = DN_FLAG; + 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; + tflag = DN_FLAG; + + } else if ( flag == 2 && *sp == 'v' /*'}'*/) { + tflag = VAL_FLAG; + + } else if ( flag == 2 && *sp == 'd' /*'}'*/) { + tflag = DN_FLAG; + + } else if ( flag == 1 && *sp == '{' /*'}'*/) { + flag = 2; + + } else if ( *sp >= '0' && *sp <= '9' ) { + int nm; + regmatch_t *m; + char *data; + 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 != /*'{'*/ '}' ) { + /* FIXME: error */ + return 1; + } + } + + switch (tflag) { + case DN_FLAG: + nm = matches->dn_count; + m = matches->dn_data; + data = dn_matches ? dn_matches->bv_val : NULL; + break; + case VAL_FLAG: + nm = matches->val_count; + m = matches->val_data; + data = val_matches ? val_matches->bv_val : NULL; + break; + default: + assert( 0 ); + } + if ( n >= nm ) { + /* FIXME: error */ + return 1; + } + if ( data == NULL ) { + /* FIXME: error */ + return 1; + } + + *dp = '\0'; + i = m[n].rm_so; + l = m[n].rm_eo; + + for ( ; size < bv->bv_len && i < l; size++, i++ ) { + *dp++ = data[i]; + } + *dp = '\0'; + + flag = 0; + tflag = DN_FLAG; + } + } 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; + + Debug( LDAP_DEBUG_ACL, "=> acl_string_expand: pattern: %.*s\n", (int)pat->bv_len, pat->bv_val ); + Debug( LDAP_DEBUG_ACL, "=> acl_string_expand: expanded: %s\n", bv->bv_val ); + + return 0; +} + +static int +regex_matches( + struct berval *pat, /* pattern to expand and match against */ + char *str, /* string to match against pattern */ + struct berval *dn_matches, /* buffer with $N expansion variables from DN */ + struct berval *val_matches, /* buffer with $N expansion variables from val */ + AclRegexMatches *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 = ""; + }; + + if ( acl_string_expand( &bv, pat, dn_matches, val_matches, matches )) { + Debug( LDAP_DEBUG_TRACE, + "expand( \"%s\", \"%s\") failed\n", + pat->bv_val, str ); + return( 0 ); + } + rc = regcomp( &re, newbuf, REG_EXTENDED|REG_ICASE ); + if ( rc ) { + char error[ACL_BUF_SIZE]; + regerror( rc, &re, error, sizeof( error ) ); + + Debug( LDAP_DEBUG_TRACE, + "compile( \"%s\", \"%s\") failed %s\n", + pat->bv_val, str, error ); + return( 0 ); + } + + rc = regexec( &re, str, 0, NULL, 0 ); + regfree( &re ); + + Debug( LDAP_DEBUG_TRACE, + "=> regex_matches: string: %s\n", str ); + Debug( LDAP_DEBUG_TRACE, + "=> regex_matches: rc: %d %s\n", + rc, !rc ? "matches" : "no matches" ); + return( !rc ); +} + |