/* acl.c - routines to parse and check acl's */
+/* $OpenLDAP$ */
+/*
+ * Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
+ * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+ */
+
+#include "portable.h"
#include <stdio.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netdb.h>
-#ifdef sunos5
-#include "regexpr.h"
-#else
-#include "regex.h"
-#endif
+
+#include <ac/regex.h>
+#include <ac/socket.h>
+#include <ac/string.h>
+
#include "slap.h"
-extern Attribute *attr_find();
-extern char *re_comp();
-extern struct acl *global_acl;
-extern int global_default_access;
-extern char *access2str();
-extern char *dn_normalize_case();
+static AccessControl * acl_get(
+ AccessControl *ac, int *count,
+ Backend *be, Operation *op,
+ Entry *e, char *attr,
+ int nmatches, regmatch_t *matches );
-int acl_access_allowed();
-int access_allowed();
-struct acl *acl_get_applicable();
+static slap_control_t acl_mask(
+ AccessControl *ac, slap_access_mask_t *mask,
+ Backend *be, Connection *conn, Operation *op,
+ Entry *e, char *attr, struct berval *val,
+ regmatch_t *matches );
-static int regex_matches();
+#ifdef SLAPD_ACI_ENABLED
+static int aci_access_allowed(
+ Backend *be,
+ Operation *op,
+ Entry *e, char *attr, struct berval *aci,
+ regmatch_t *matches );
+#endif
+
+static int regex_matches(char *pat, char *str, char *buf, regmatch_t *matches);
+static void string_expand(char *newbuf, int bufsiz, char *pattern,
+ char *match, regmatch_t *matches);
-extern pthread_mutex_t regex_mutex;
/*
- * access_allowed - check whether dn is allowed the requested access
+ * 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 finds
- * the applicable acl and calls acl_access_allowed() to make the
- * decision.
+ * the whole attribute is assumed (all values).
*
- * returns 0 access NOT allowed
- * 1 access allowed
+ * 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
Entry *e,
char *attr,
struct berval *val,
- char *dn,
- int access
+ slap_access_t access
)
{
- int rc;
- struct acl *a;
+ int count;
+ AccessControl *a;
+ char accessmaskbuf[ACCESSMASK_MAXLEN];
+ slap_access_mask_t mask;
+ slap_control_t control;
- if ( be == NULL ) {
- return( 0 );
+ regmatch_t matches[MAXREMATCHES];
+
+ Debug( LDAP_DEBUG_ACL,
+ "=> access_allowed: %s access to \"%s\" \"%s\" requested\n",
+ access2str( access ),
+ e->e_dn, attr );
+
+ assert( be != NULL );
+ assert( e != NULL );
+ assert( attr != NULL );
+ assert( access > ACL_NONE );
+
+ /* grant database root access */
+ if ( be != NULL && be_isroot( be, op->o_ndn ) ) {
+ Debug( LDAP_DEBUG_ACL,
+ "<= root access granted\n",
+ 0, 0, 0 );
+ return 1;
+ }
+
+ /* no user modify operational attributes are ignored by ACL checking */
+ if ( oc_check_no_usermod_attr( attr ) ) {
+ Debug( LDAP_DEBUG_ACL, "NoUserMod Operational attribute:"
+ " %s access granted\n",
+ attr, 0, 0 );
+ return 1;
+ }
+
+ /* use backend default access if no backend acls */
+ if( be != NULL && be->be_acl == NULL ) {
+ 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 );
+
+ return be->be_dfltaccess >= access;
+
+#ifdef notdef
+ /* be is always non-NULL */
+ /* use global default access if no global acls */
+ } else if ( be == NULL && global_acl == NULL ) {
+ 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 );
+
+ return global_default_access >= access;
+#endif
+ }
+
+ ACL_INIT(mask);
+ memset(matches, 0, sizeof(matches));
+
+ control = ACL_BREAK;
+ a = NULL;
+ count = 0;
+
+ while( a = acl_get( a, &count, be, op, e, attr, MAXREMATCHES, matches ) )
+ {
+ int i;
+
+ for (i = 0; i < MAXREMATCHES && matches[i].rm_so > 0; i++) {
+ Debug( LDAP_DEBUG_ACL, "=> match[%d]: %d %d ", i,
+ (int)matches[i].rm_so, (int)matches[i].rm_eo );
+
+ 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 );
+ }
+ }
+ Debug( LDAP_DEBUG_ARGS, "\n", 0, 0, 0 );
+ }
+
+ control = acl_mask( a, &mask, be, conn, op,
+ e, attr, val, matches );
+
+ if ( control != ACL_BREAK ) {
+ break;
+ }
+
+ memset(matches, 0, sizeof(matches));
}
- a = acl_get_applicable( be, op, e, attr );
- rc = acl_access_allowed( a, be, conn, e, val, op, access );
+ if ( ACL_IS_INVALID( mask ) ) {
+ Debug( LDAP_DEBUG_ACL,
+ "=> access_allowed: \"%s\" (%s) invalid!\n",
+ e->e_dn, attr, 0 );
+ ACL_INIT( mask );
+
+ } else if ( control == ACL_BREAK ) {
+ Debug( LDAP_DEBUG_ACL,
+ "=> access_allowed: no more rules\n", 0, 0, 0);
+ ACL_INIT( mask );
+ }
+
+ Debug( LDAP_DEBUG_ACL,
+ "=> access_allowed: %s access %s by %s\n",
+ access2str( access ),
+ ACL_GRANT(mask, access) ? "granted" : "denied",
+ accessmask2str( mask, accessmaskbuf ) );
- return( rc );
+ return ACL_GRANT(mask, access);
}
/*
- * acl_get_applicable - return the acl applicable to entry e, attribute
+ * 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().
*/
-struct acl *
-acl_get_applicable(
+static AccessControl *
+acl_get(
+ AccessControl *a,
+ int *count,
Backend *be,
- Operation *op,
+ Operation *op,
Entry *e,
- char *attr
+ char *attr,
+ int nmatch,
+ regmatch_t *matches
)
{
- int i;
- struct acl *a;
- char *edn;
+ assert( e != NULL );
+ assert( count != NULL );
- Debug( LDAP_DEBUG_ACL, "=> acl_get: entry (%s) attr (%s)\n", e->e_dn,
- attr, 0 );
+ if( a == NULL ) {
+ if( be == NULL ) {
+ a = global_acl;
+ } else {
+ a = be->be_acl;
+ }
- if ( be_isroot( be, op->o_dn ) ) {
- Debug( LDAP_DEBUG_ACL,
- "<= acl_get: no acl applicable to database root\n", 0, 0,
- 0 );
- return( NULL );
- }
+ assert( a != NULL );
- /* check for a backend-specific acl that matches the entry */
- for ( i = 1, a = be->be_acl; a != NULL; a = a->acl_next, i++ ) {
- if ( a->acl_dnpat != NULL ) {
- edn = dn_normalize_case( strdup( e->e_dn ) );
- if ( ! regex_matches( a->acl_dnpat, edn ) ) {
- free( edn );
- continue;
- }
- free( edn );
- }
- if ( a->acl_filter != NULL ) {
- if ( test_filter( NULL, NULL, NULL, e, a->acl_filter )
- != 0 ) {
- continue;
- }
- }
- if ( attr == NULL || a->acl_attrs == NULL ||
- charray_inlist( a->acl_attrs, attr ) ) {
- Debug( LDAP_DEBUG_ACL, "<= acl_get: backend acl #%d\n",
- i, e->e_dn, attr );
- return( a );
- }
+ } else {
+ a = a->acl_next;
}
- /* check for a global acl that matches the entry */
- for ( i = 1, a = global_acl; a != NULL; a = a->acl_next, i++ ) {
- if ( a->acl_dnpat != NULL ) {
- edn = dn_normalize_case( strdup( e->e_dn ) );
- if ( ! regex_matches( a->acl_dnpat, edn ) ) {
- free( edn );
+ for ( ; a != NULL; a = a->acl_next ) {
+ (*count) ++;
+
+ if (a->acl_dn_pat != NULL) {
+ Debug( LDAP_DEBUG_ACL, "=> dnpat: [%d] %s nsub: %d\n",
+ *count, a->acl_dn_pat, (int) a->acl_dn_re.re_nsub );
+
+ if (regexec(&a->acl_dn_re, e->e_ndn, nmatch, matches, 0)) {
continue;
+
+ } else {
+ Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] matched\n",
+ *count, 0, 0);
}
- free( edn );
}
+
if ( a->acl_filter != NULL ) {
- if ( test_filter( NULL, NULL, NULL, e, a->acl_filter )
- != 0 ) {
+ if ( test_filter( NULL, NULL, NULL, e, a->acl_filter ) != 0 ) {
continue;
}
}
- if ( attr == NULL || a->acl_attrs == NULL || charray_inlist(
- a->acl_attrs, attr ) ) {
- Debug( LDAP_DEBUG_ACL, "<= acl_get: global acl #%d\n",
- i, e->e_dn, attr );
- return( a );
+
+ Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] check attr %s\n",
+ *count, attr, 0);
+
+ if ( attr == NULL || a->acl_attrs == NULL ||
+ charray_inlist( a->acl_attrs, attr ) )
+ {
+ Debug( LDAP_DEBUG_ACL,
+ "<= acl_get: [%d] acl %s attr: %s\n",
+ *count, e->e_dn, attr );
+ return a;
}
+ matches[0].rm_so = matches[0].rm_eo = -1;
}
- Debug( LDAP_DEBUG_ACL, "<= acl_get: no match\n", 0, 0, 0 );
+ Debug( LDAP_DEBUG_ACL, "<= acl_get: done.\n", 0, 0, 0 );
return( NULL );
}
+
/*
- * acl_access_allowed - check whether the given acl allows dn the
+ * 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).
*
* 1 access allowed
*/
-int
-acl_access_allowed(
- struct acl *a,
+static slap_control_t
+acl_mask(
+ AccessControl *a,
+ slap_access_mask_t *mask,
Backend *be,
- Connection *conn,
+ Connection *conn,
+ Operation *op,
Entry *e,
+ char *attr,
struct berval *val,
- Operation *op,
- int access
+ regmatch_t *matches
)
{
int i;
- char *edn, *odn;
- struct access *b;
- Attribute *at;
- struct berval bv;
- int default_access;
-
- Debug( LDAP_DEBUG_ACL, "=> acl: %s access to value \"%s\" by \"%s\"\n",
- access2str( access ), val ? val->bv_val : "any", op->o_dn ?
- op->o_dn : "" );
-
- if ( be_isroot( be, op->o_dn ) ) {
- Debug( LDAP_DEBUG_ACL, "<= acl: granted to database root\n",
- 0, 0, 0 );
- return( 1 );
- }
+ Access *b;
+ char accessmaskbuf[ACCESSMASK_MAXLEN];
- default_access = be->be_dfltaccess ? be->be_dfltaccess :
- global_default_access;
- if ( a == NULL ) {
- Debug( LDAP_DEBUG_ACL,
- "<= acl: %s by default (no matching to)\n",
- default_access >= access ? "granted" : "denied", 0, 0 );
- return( default_access >= access );
- }
+ assert( a != NULL );
+ assert( mask != NULL );
+
+ 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 value \"%s\" by \"%s\", (%s) \n",
+ val ? val->bv_val : "*",
+ op->o_ndn ? op->o_ndn : "",
+ accessmask2str( *mask, accessmaskbuf ) );
- odn = NULL;
- if ( op->o_dn != NULL ) {
- odn = dn_normalize_case( strdup( op->o_dn ) );
- bv.bv_val = odn;
- bv.bv_len = strlen( odn );
- }
for ( i = 1, b = a->acl_access; b != NULL; b = b->a_next, i++ ) {
- if ( b->a_dnpat != NULL ) {
+ slap_access_mask_t oldmask, modmask;
+
+ ACL_INVALIDATE( modmask );
+
+ /* AND <who> clauses */
+ if ( b->a_dn_pat != NULL ) {
+ Debug( LDAP_DEBUG_ACL, "<= check a_dn_pat: %s\n",
+ b->a_dn_pat, 0, 0);
/*
* 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 ( strcasecmp( b->a_dnpat, "self" ) == 0 && op->o_dn
- != NULL && *(op->o_dn) && e->e_dn != NULL ) {
- edn = dn_normalize_case( strdup( e->e_dn ) );
- if ( strcasecmp( edn, op->o_dn ) == 0 ) {
- free( edn );
- if ( odn ) free( odn );
- Debug( LDAP_DEBUG_ACL,
- "<= acl: matched by clause #%d access %s\n",
- i, (b->a_access & ~ACL_SELF) >=
- access ? "granted" : "denied", 0 );
+ if ( strcmp( b->a_dn_pat, "anonymous" ) == 0 ) {
+ if (op->o_ndn != NULL && op->o_ndn[0] != '\0' ) {
+ continue;
+ }
+
+ } else if ( strcmp( b->a_dn_pat, "users" ) == 0 ) {
+ if (op->o_ndn == NULL || op->o_ndn[0] == '\0' ) {
+ continue;
+ }
- return( (b->a_access & ~ACL_SELF)
- >= access );
+ } else if ( strcmp( b->a_dn_pat, "self" ) == 0 ) {
+ if( op->o_ndn == NULL || op->o_ndn[0] == '\0' ) {
+ continue;
}
- free( edn );
- } else {
- if ( regex_matches( b->a_dnpat, odn ) ) {
- if ( odn ) free( odn );
- Debug( LDAP_DEBUG_ACL,
- "<= acl: matched by clause #%d access %s\n",
- i, (b->a_access & ~ACL_SELF) >= access ?
- "granted" : "denied", 0 );
+
+ if ( e->e_dn == NULL || strcmp( e->e_ndn, op->o_ndn ) != 0 ) {
+ continue;
+ }
+
+ } else if ( strcmp( b->a_dn_pat, "*" ) != 0 ) {
+ int ret = regex_matches( b->a_dn_pat,
+ op->o_ndn, e->e_ndn, matches );
- return( (b->a_access & ~ACL_SELF)
- >= access );
+ if( ret == 0 ) {
+ continue;
}
}
}
- if ( b->a_addrpat != NULL ) {
- if ( regex_matches( b->a_addrpat, conn->c_addr ) ) {
- if ( odn ) free( odn );
- Debug( LDAP_DEBUG_ACL,
- "<= acl: matched by clause #%d access %s\n",
- i, (b->a_access & ~ACL_SELF) >= access ?
- "granted" : "denied", 0 );
-
- return( (b->a_access & ~ACL_SELF) >= access );
+
+ if ( b->a_sockurl_pat != NULL ) {
+ Debug( LDAP_DEBUG_ACL, "<= check a_sockurl_pat: %s\n",
+ b->a_sockurl_pat, 0, 0 );
+
+ if ( strcmp( b->a_sockurl_pat, "*" ) != 0 &&
+ !regex_matches( b->a_sockurl_pat, conn->c_listener_url,
+ e->e_ndn, matches ) )
+ {
+ continue;
+ }
+ }
+
+ if ( b->a_domain_pat != NULL ) {
+ Debug( LDAP_DEBUG_ACL, "<= check a_domain_pat: %s\n",
+ b->a_domain_pat, 0, 0 );
+
+ if ( strcmp( b->a_domain_pat, "*" ) != 0 &&
+ !regex_matches( b->a_domain_pat, conn->c_peer_domain,
+ e->e_ndn, matches ) )
+ {
+ continue;
+ }
+ }
+
+ if ( b->a_peername_pat != NULL ) {
+ Debug( LDAP_DEBUG_ACL, "<= check a_peername_path: %s\n",
+ b->a_peername_pat, 0, 0 );
+
+ if ( strcmp( b->a_peername_pat, "*" ) != 0 &&
+ !regex_matches( b->a_peername_pat, conn->c_peer_name,
+ e->e_ndn, matches ) )
+ {
+ continue;
}
}
- if ( b->a_domainpat != NULL ) {
- if ( regex_matches( b->a_domainpat, conn->c_domain ) ) {
- if ( odn ) free( odn );
- Debug( LDAP_DEBUG_ACL,
- "<= acl: matched by clause #%d access %s\n",
- i, (b->a_access & ~ACL_SELF) >= access ?
- "granted" : "denied", 0 );
-
- return( (b->a_access & ~ACL_SELF) >= access );
+
+ if ( b->a_sockname_pat != NULL ) {
+ Debug( LDAP_DEBUG_ACL, "<= check a_sockname_path: %s\n",
+ b->a_sockname_pat, 0, 0 );
+
+ if ( strcmp( b->a_sockname_pat, "*" ) != 0 &&
+ !regex_matches( b->a_sockname_pat, conn->c_sock_name,
+ e->e_ndn, matches ) )
+ {
+ continue;
}
}
- if ( b->a_dnattr != NULL && op->o_dn != NULL ) {
- /* see if asker is listed in dnattr */
- if ( (at = attr_find( e->e_attrs, b->a_dnattr ))
- != NULL && value_find( at->a_vals, &bv,
- at->a_syntax, 3 ) == 0 )
+
+ if ( b->a_dn_at != NULL && op->o_ndn != NULL ) {
+ Attribute *at;
+ struct berval bv;
+
+ Debug( LDAP_DEBUG_ACL, "<= check a_dn_at: %s\n",
+ b->a_dn_at, 0, 0);
+
+ bv.bv_val = op->o_ndn;
+ bv.bv_len = strlen( bv.bv_val );
+
+ /* see if asker is listed in dnattr */
+ if ( (at = attr_find( e->e_attrs, b->a_dn_at )) != NULL &&
+ value_find( at->a_vals, &bv, at->a_syntax, 3 ) == 0 )
{
- if ( (b->a_access & ACL_SELF) && (val == NULL
- || value_cmp( &bv, val, at->a_syntax,
- 2 )) ) {
+ if ( b->a_dn_self &&
+ (val == NULL || value_cmp( &bv, val, at->a_syntax, 2 )) )
+ {
continue;
}
- if ( odn ) free( odn );
- Debug( LDAP_DEBUG_ACL,
- "<= acl: matched by clause #%d access %s\n",
- i, (b->a_access & ~ACL_SELF) >= access ?
- "granted" : "denied", 0 );
+ /* asker not listed in dnattr - check for self access */
+ } else if ( ! b->a_dn_self || val == NULL ||
+ value_cmp( &bv, val, at->a_syntax, 2 ) != 0 )
+ {
+ continue;
+ }
+ }
+
+ if ( b->a_group_pat != NULL && op->o_ndn != NULL ) {
+ char buf[1024];
- return( (b->a_access & ~ACL_SELF) >= access );
+ /* 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 */
+ string_expand(buf, sizeof(buf), b->a_group_pat, e->e_ndn, matches);
+ if ( dn_normalize(buf) == NULL ) {
+ /* did not expand to a valid dn */
+ continue;
}
- /* asker not listed in dnattr - check for self access */
- if ( ! (b->a_access & ACL_SELF) || val == NULL ||
- value_cmp( &bv, val, at->a_syntax, 2 ) != 0 ) {
+ if (backend_group(be, e, buf, op->o_ndn,
+ b->a_group_oc, b->a_group_at) != 0)
+ {
continue;
}
+ }
- if ( odn ) free( odn );
- Debug( LDAP_DEBUG_ACL,
- "<= acl: matched by clause #%d (self) access %s\n",
- i, (b->a_access & ~ACL_SELF) >= access ? "granted"
- : "denied", 0 );
+#ifdef SLAPD_ACI_ENABLED
+ if ( b->a_aci_at != NULL ) {
+ Attribute *at;
+
+ /* this case works different from the others above.
+ * since aci's themselves give permissions, we need
+ * to first check b->a_mask, the ACL's access level.
+ */
+
+ if( op->o_ndn == NULL || op->o_ndn[0] == '\0' ) {
+ continue;
+ }
+
+ if ( e->e_dn == NULL ) {
+ continue;
+ }
+
+ /* first check if the right being requested is
+ * higher than allowed by the ACL clause.
+ */
+ if ( ! ACL_GRANT( b->a_mask, access ) ) {
+ continue;
+ }
+
+ /* get the aci attribute */
+ at = attr_find( e->e_attrs, b->a_aci_at );
+ if ( at == NULL ) {
+ continue;
+ }
+
+ /* 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] != NULL; i++ ) {
+ if ( aci_access_allowed( be, op,
+ e, attr, at->a_vals[i],
+ matches ) )
+ {
+ Debug( LDAP_DEBUG_ACL,
+ "<= acl_mask: matched by clause #%d access granted\n",
+ i, 0, 0 );
+ break;
+ }
+ }
+
+ if( ACL_IS_INVALID( modmask ) ) {
+ continue;
+ }
- return( (b->a_access & ~ACL_SELF) >= access );
+ } else
+#endif
+ {
+ modmask = b->a_mask;
}
- }
- if ( odn ) free( odn );
- Debug( LDAP_DEBUG_ACL, "<= acl: %s by default (no matching by)\n",
- default_access >= access ? "granted" : "denied", 0, 0 );
- return( default_access >= access );
+ 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" );
+
+ /* 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;
+ }
+
+ Debug( LDAP_DEBUG_ACL,
+ "<= acl_mask: [%d] mask: %s\n",
+ i, accessmask2str(*mask, accessmaskbuf), 0 );
+
+ if( b->a_type == ACL_CONTINUE ) {
+ continue;
+
+ } else if ( b->a_type == ACL_BREAK ) {
+ return ACL_BREAK;
+
+ } else {
+ return ACL_STOP;
+ }
+ }
+
+ Debug( LDAP_DEBUG_ACL,
+ "<= acl_mask: no more <who> clauses, returning %s (stop)\n",
+ accessmask2str(*mask, accessmaskbuf), 0, 0 );
+ return ACL_STOP;
}
/*
- * acl_check_mods - check access control on the given entry to see if
+ * 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 LDAP_SUCCESS mods allowed ok
- * anything else mods not allowed - return is an error
- * code indicating the problem
+ * returns 1 if mods allowed ok
+ * 0 mods not allowed
*/
int
-acl_check_mods(
+acl_check_modlist(
Backend *be,
Connection *conn,
Operation *op,
Entry *e,
- LDAPMod *mods
+ LDAPModList *mlist
)
{
int i;
- struct acl *a;
- for ( ; mods != NULL; mods = mods->mod_next ) {
- if ( strcasecmp( mods->mod_type, "modifiersname" ) == 0 ||
- strcasecmp( mods->mod_type, "modifytimestamp" ) == 0 ) {
+ assert( be != NULL );
+
+ /* short circuit root database access */
+ if ( be_isroot( be, op->o_ndn ) ) {
+ Debug( LDAP_DEBUG_ACL,
+ "<= acl_access_allowed: granted to database root\n",
+ 0, 0, 0 );
+ return 1;
+ }
+
+ /* use backend default access if no backend acls */
+ if( be != NULL && be->be_acl == NULL ) {
+ Debug( LDAP_DEBUG_ACL,
+ "=> access_allowed: backend default %s access %s to \"%s\"\n",
+ access2str( ACL_WRITE ),
+ be->be_dfltaccess >= ACL_WRITE ? "granted" : "denied", op->o_dn );
+
+ return be->be_dfltaccess >= ACL_WRITE;
+
+#ifdef notdef
+ /* be is always non-NULL */
+ /* use global default access if no global acls */
+ } else if ( be == NULL && global_acl == NULL ) {
+ Debug( LDAP_DEBUG_ACL,
+ "=> access_allowed: global default %s access %s to \"%s\"\n",
+ access2str( ACL_WRITE ),
+ global_default_access >= ACL_WRITE ? "granted" : "denied", op->o_dn );
+
+ return global_default_access >= ACL_WRITE;
+#endif
+ }
+
+ for ( ; mlist != NULL; mlist = mlist->ml_next ) {
+ /* the lastmod attributes are ignored by ACL checking */
+ if ( oc_check_no_usermod_attr( mlist->ml_type ) ) {
+ Debug( LDAP_DEBUG_ACL, "Operational attribute: %s access allowed\n",
+ mlist->ml_type, 0, 0 );
continue;
}
- a = acl_get_applicable( be, op, e, mods->mod_type );
-
- switch ( mods->mod_op & ~LDAP_MOD_BVALUES ) {
+ switch ( mlist->ml_op & ~LDAP_MOD_BVALUES ) {
case LDAP_MOD_REPLACE:
case LDAP_MOD_ADD:
- if ( mods->mod_bvalues == NULL ) {
+ if ( mlist->ml_bvalues == NULL ) {
break;
}
- for ( i = 0; mods->mod_bvalues[i] != NULL; i++ ) {
- if ( ! acl_access_allowed( a, be, conn, e,
- mods->mod_bvalues[i], op, ACL_WRITE ) ) {
- return( LDAP_INSUFFICIENT_ACCESS );
+ for ( i = 0; mlist->ml_bvalues[i] != NULL; i++ ) {
+ if ( ! access_allowed( be, conn, op, e,
+ mlist->ml_type, mlist->ml_bvalues[i],
+ ACL_WRITE ) )
+ {
+ return( 0 );
}
}
break;
case LDAP_MOD_DELETE:
- if ( mods->mod_bvalues == NULL ) {
- if ( ! acl_access_allowed( a, be, conn, e,
- NULL, op, ACL_WRITE ) ) {
- return( LDAP_INSUFFICIENT_ACCESS );
+ if ( mlist->ml_bvalues == NULL ) {
+ if ( ! access_allowed( be, conn, op, e,
+ mlist->ml_type, NULL,
+ ACL_WRITE ) )
+ {
+ return( 0 );
}
break;
}
- for ( i = 0; mods->mod_bvalues[i] != NULL; i++ ) {
- if ( ! acl_access_allowed( a, be, conn, e,
- mods->mod_bvalues[i], op, ACL_WRITE ) ) {
- return( LDAP_INSUFFICIENT_ACCESS );
+ for ( i = 0; mlist->ml_bvalues[i] != NULL; i++ ) {
+ if ( ! access_allowed( be, conn, op, e,
+ mlist->ml_type, mlist->ml_bvalues[i],
+ ACL_WRITE ) )
+ {
+ return( 0 );
}
}
break;
}
}
- return( LDAP_SUCCESS );
+ return( 1 );
}
-#ifdef sunos5
+#ifdef SLAPD_ACI_ENABLED
+static char *
+aci_bvstrdup (struct berval *bv)
+{
+ char *s;
+
+ s = (char *)ch_malloc(bv->bv_len + 1);
+ if (s != NULL) {
+ memcpy(s, bv->bv_val, bv->bv_len);
+ s[bv->bv_len] = 0;
+ }
+ return(s);
+}
static int
-regex_matches( char *pat, char *str )
+aci_strbvcmp (char *s, struct berval *bv)
{
- char *e;
- int rc;
+ int res, len;
- if ( (e = compile( pat, NULL, NULL )) == NULL ) {
- Debug( LDAP_DEBUG_ANY,
- "compile( \"%s\", \"%s\") failed\n", pat, str, 0 );
- return( 0 );
+ res = strncasecmp( s, bv->bv_val, bv->bv_len );
+ if (res)
+ return(res);
+ len = strlen(s);
+ if (len > bv->bv_len)
+ return(1);
+ if (len < bv->bv_len)
+ return(-1);
+ return(0);
+}
+
+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);
+}
+
+static int
+aci_list_has_right(
+ struct berval *list,
+ slap_access_t access,
+ int action)
+{
+ struct berval bv;
+ int i;
+ slap_access_t right;
+
+ for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) {
+ if (bv.bv_len <= 0)
+ continue;
+ switch (*bv.bv_val) {
+ case 'c':
+ right = ACL_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.
+ */
+ right = ACL_SEARCH;
+ break;
+ case 'r':
+ right = ACL_READ;
+ break;
+ case 'w':
+ right = ACL_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.
+ */
+ right = ACL_AUTH;
+ break;
+ default:
+ right = 0;
+ break;
+ }
+
+#ifdef SLAPD_ACI_DISCRETE_RIGHTS
+ if (right & access) {
+ return(action);
+ }
+#else
+ if (action != 0) {
+ /* check granted */
+ if (ACL_GRANT(right, access))
+ return(1);
+ } else {
+ /* check denied */
+ if (right <= access)
+ return(1);
+ }
+#endif
}
- rc = step( str ? str : "", e );
- free( e );
- return( rc );
+#ifdef SLAPD_ACI_DISCRETE_RIGHTS
+ return(!action);
+#else
+ return(0);
+#endif
}
-#else /* sunos5 */
+static int
+aci_list_has_attr (struct berval *list, char *attr)
+{
+ struct berval bv;
+ int i;
+
+ for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) {
+ if (aci_strbvcmp(attr, &bv) == 0) {
+ return(1);
+ }
+ }
+ return(0);
+}
static int
-regex_matches( char *pat, char *str )
+aci_list_has_attr_right (struct berval *list, char *attr, int access, int action)
{
- char *e;
+ struct berval bv;
+ int i, found;
+
+ /* loop through each rights/attr pair, skip first part (action) */
+ found = -1;
+ for (i = 1; aci_get_part(list, i + 1, ';', &bv) >= 0; i += 2) {
+ if (aci_list_has_attr(&bv, attr) == 0)
+ continue;
+ found = 0;
+ if (aci_get_part(list, i, ';', &bv) < 0)
+ continue;
+ if (aci_list_has_right(&bv, access, action) != 0)
+ return(1);
+ }
+ return(found);
+}
+
+static int
+aci_list_has_permission(
+ struct berval *list,
+ char *attr,
+ slap_access_t access)
+{
+ struct berval perm, actn;
+ int i, action, specific, general;
+
+ if (attr == NULL || *attr == 0 || strcasecmp(attr, "entry") == 0) {
+ attr = "[entry]";
+ }
+
+ /* 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 (aci_strbvcmp( "grant", &actn ) == 0) {
+ action = 1;
+ } else if (aci_strbvcmp( "deny", &actn ) == 0) {
+ action = 0;
+ } else {
+ continue;
+ }
+
+ specific = aci_list_has_attr_right(&perm, attr, access, action);
+ if (specific >= 0)
+ return(specific);
+
+ general = aci_list_has_attr_right(&perm, "[all]", access, action);
+ if (general >= 0)
+ return(general);
+ }
+ return(0);
+}
+
+static int
+aci_group_member (
+ struct berval *subj,
+ char *grpoc,
+ char *grpat,
+ Backend *be,
+ Entry *e,
+ Operation *op,
+ regmatch_t *matches
+)
+{
+ struct berval bv;
+ char *subjdn, *grpdn;
+ int rc = 0;
+
+ /* format of string is "group/objectClassValue/groupAttrName" */
+ if (aci_get_part(subj, 0, '/', &bv) < 0)
+ return(0);
+ subjdn = aci_bvstrdup(&bv);
+ if (subjdn == NULL)
+ return(0);
+
+ if (aci_get_part(subj, 1, '/', &bv) < 0)
+ grpoc = ch_strdup(grpoc);
+ else
+ grpoc = aci_bvstrdup(&bv);
+
+ if (aci_get_part(subj, 2, '/', &bv) < 0)
+ grpat = ch_strdup(grpat);
+ else
+ grpat = aci_bvstrdup(&bv);
+
+ grpdn = (char *)ch_malloc(1024);
+ if (grpoc != NULL && grpat != NULL && grpdn != NULL) {
+ string_expand(grpdn, 1024, subjdn, e->e_ndn, matches);
+ if ( dn_normalize(grpdn) != NULL ) {
+ rc = (backend_group(be, e, grpdn, op->o_ndn, grpoc, grpat) == 0);
+ }
+ ch_free(grpdn);
+ }
+ if (grpat != NULL)
+ ch_free(grpat);
+ if (grpoc != NULL)
+ ch_free(grpoc);
+ ch_free(subjdn);
+ return(rc);
+}
+
+static int
+aci_access_allowed (
+ struct berval *aci,
+ char *attr,
+ Backend *be,
+ Entry *e,
+ Operation *op,
+ slap_access_t access,
+ regmatch_t *matches
+)
+{
+ struct berval bv, perms, sdn;
+ char *subjdn;
+ int rc;
+
+ Debug( LDAP_DEBUG_ACL,
+ "=> aci_access_allowed: %s access to entry \"%s\"\n",
+ access2str( access ), e->e_dn, 0 );
+
+ Debug( LDAP_DEBUG_ACL,
+ "=> aci_access_allowed: %s access to attribute \"%s\" by \"%s\"\n",
+ access2str( access ),
+ attr,
+ op->o_ndn ? op->o_ndn : "" );
+
+ /* 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-0.3.txt section 9.1 for
+ a full description of the format for this attribute.
+
+ 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 scope is "entry" */
+ if (aci_get_part(aci, 1, '#', &bv) < 0
+ || aci_strbvcmp( "entry", &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_has_permission(&perms, attr, access) == 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 (aci_strbvcmp( "access-id", &bv ) == 0) {
+ subjdn = aci_bvstrdup(&sdn);
+ if (subjdn == NULL)
+ return(0);
+ rc = 0;
+ if ( dn_normalize(subjdn) != NULL )
+ rc = (strcasecmp(op->o_ndn, subjdn) == 0);
+ ch_free(subjdn);
+ return(rc);
+ }
+
+ if (aci_strbvcmp( "self", &bv ) == 0) {
+ return(strcasecmp(op->o_ndn, e->e_ndn) == 0);
+ }
+
+ if (aci_strbvcmp( "group", &bv ) == 0) {
+ return(aci_group_member(&sdn, "groupOfNames", "member", be, e, op, matches));
+ }
+
+ if (aci_strbvcmp( "role", &bv ) == 0) {
+ return(aci_group_member(&sdn, "organizationalRole", "roleOccupant", be, e, op, matches));
+ }
+
+ return(0);
+}
+#endif /* SLAPD_ACI_ENABLED */
+
+static void
+string_expand(
+ char *newbuf,
+ int bufsiz,
+ char *pat,
+ char *match,
+ regmatch_t *matches)
+{
+ int size;
+ char *sp;
+ char *dp;
+ int flag;
+
+ size = 0;
+ newbuf[0] = '\0';
+ bufsiz--; /* leave space for lone $ */
+
+ flag = 0;
+ for ( dp = newbuf, sp = pat; size < bufsiz && *sp ; sp++) {
+ /* did we previously see a $ */
+ if (flag) {
+ if (*sp == '$') {
+ *dp++ = '$';
+ size++;
+ } else if (*sp >= '0' && *sp <= '9' ) {
+ int n;
+ int i;
+ int l;
+
+ n = *sp - '0';
+ *dp = '\0';
+ i = matches[n].rm_so;
+ l = matches[n].rm_eo;
+ for ( ; size < 512 && i < l; size++, i++ ) {
+ *dp++ = match[i];
+ size++;
+ }
+ *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';
+
+ Debug( LDAP_DEBUG_TRACE, "=> string_expand: pattern: %s\n", pat, 0, 0 );
+ Debug( LDAP_DEBUG_TRACE, "=> string_expand: expanded: %s\n", newbuf, 0, 0 );
+}
+
+static int
+regex_matches(
+ char *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[512];
int rc;
- pthread_mutex_lock( ®ex_mutex );
- if ( (e = re_comp( pat )) != NULL ) {
- Debug( LDAP_DEBUG_ANY,
- "re_comp( \"%s\", \"%s\") failed because (%s)\n", pat, str,
- e );
- pthread_mutex_unlock( ®ex_mutex );
+ if(str == NULL) str = "";
+
+ string_expand(newbuf, sizeof(newbuf), pat, buf, matches);
+ if (( rc = regcomp(&re, newbuf, REG_EXTENDED|REG_ICASE))) {
+ char error[512];
+ regerror(rc, &re, error, sizeof(error));
+
+ Debug( LDAP_DEBUG_TRACE,
+ "compile( \"%s\", \"%s\") failed %s\n",
+ pat, str, error );
return( 0 );
}
- rc = re_exec( str ? str : "" );
- pthread_mutex_unlock( ®ex_mutex );
- return( rc == 1 );
+ rc = regexec(&re, str, 0, NULL, 0);
+ regfree( &re );
+
+ 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 );
+ return( !rc );
}
-#endif /* sunos5 */
projects / openldap / blobdiff