mirror of
https://git.openldap.org/openldap/openldap.git
synced 2024-12-21 03:10:25 +08:00
746 lines
16 KiB
C
746 lines
16 KiB
C
/* $OpenLDAP$ */
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/*
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* Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
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* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
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*/
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#include "portable.h"
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#include <ac/stdlib.h>
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#include <stdio.h>
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#include <lber.h>
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#include <ldap_log.h>
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#include "slap.h"
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#ifdef HAVE_CYRUS_SASL
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#include <limits.h>
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#include <sasl.h>
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#include <ldap_pvt.h>
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#ifdef SLAPD_SPASSWD
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#include <lutil.h>
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#endif
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static sasl_security_properties_t sasl_secprops;
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static int
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slap_sasl_log(
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void *context,
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int priority,
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const char *message)
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{
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Connection *conn = context;
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int level;
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const char * label;
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if ( message == NULL ) {
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return SASL_BADPARAM;
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}
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switch (priority) {
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case SASL_LOG_ERR:
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level = LDAP_DEBUG_ANY;
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label = "Error";
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break;
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case SASL_LOG_WARNING:
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level = LDAP_DEBUG_TRACE;
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label = "Warning";
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break;
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case SASL_LOG_INFO:
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level = LDAP_DEBUG_TRACE;
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label = "Info";
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break;
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default:
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return SASL_BADPARAM;
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}
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#ifdef NEW_LOGGING
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LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
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"SASL [conn=%ld] %s: %s\n",
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conn ? conn->c_connid : -1,
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label, message ));
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#else
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Debug( level, "SASL [conn=%ld] %s: %s\n",
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conn ? conn->c_connid: -1,
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label, message );
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#endif
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return SASL_OK;
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}
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/* Take any sort of identity string and return a DN with the "dn:" prefix. The
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string returned in *dnptr is in its own allocated memory, and must be free'd
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by the calling process.
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-Mark Adamson, Carnegie Mellon
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*/
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int slap_sasl_getdn( Connection *conn, char *id, char **dnptr, int flags )
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{
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char *c=NULL, *c1, *dn=NULL;
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int rc, len;
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sasl_conn_t *ctx;
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#ifdef NEW_LOGGING
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LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
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"slap_sasl_getdn: conn %d id=%s\n",
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conn ? conn->c_connid : -1,
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id ? (*id ? id : "<empty>") : "NULL" ));
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#else
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Debug( LDAP_DEBUG_ARGS, "slap_sasl_getdn: id=%s\n",
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id?(*id?id:"<empty>"):"NULL",0,0 );
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#endif
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/* Blatantly anonymous ID */
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len = strlen( "anonymous" );
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if( id && !strncasecmp( id, "anonymous", len) &&
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( id[len] == '\0' || id[len] == '@' ) ) {
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*dnptr = NULL;
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return( LDAP_SUCCESS );
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}
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ctx = conn->c_sasl_context;
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len = strlen( id );
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/* An authcID needs to be converted to authzID form */
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if( flags & FLAG_GETDN_AUTHCID ) {
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if( sasl_external_x509dn_convert && conn->c_sasl_bind_mech
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&& ( strcasecmp( "EXTERNAL", conn->c_sasl_bind_mech ) == 0 )
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&& len && id[0] == '/' /* && id[len-1]== '/' */)
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{
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/* check SASL external for X.509 style DN and */
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/* convert to dn:<dn> form */
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char *tmpdn = ldap_dcedn2dn( id );
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len = strlen( tmpdn );
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dn = ch_malloc( len+4 );
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dn[0] = 'd';
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dn[1] = 'n';
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dn[2] = ':';
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memmove( &dn[3], tmpdn, len+1 );
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len += 3;
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} else {
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/* convert to u:<username> form */
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dn = ch_malloc( len+3 );
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dn[0] = 'u';
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dn[1] = ':';
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memmove( &dn[2], id, len+1 );
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len += 2;
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}
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} else {
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dn = ch_strdup( id );
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}
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/* An authzID must be properly prefixed */
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if( flags & FLAG_GETDN_AUTHZID
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&& strncasecmp( dn, "u:", 2 )
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&& strncasecmp( dn, "dn:", 3 ) )
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{
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ch_free( dn );
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*dnptr = NULL;
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return( LDAP_INAPPROPRIATE_AUTH );
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}
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/* Username strings */
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if( !strncasecmp( dn, "u:", 2 ) ) {
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int len1 = strlen( ",cn=auth" );
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len += strlen( "dn:uid=" ) + len1;
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/* Figure out how much data we have for the dn */
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rc = sasl_getprop( ctx, SASL_REALM, (void **)&c );
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if( rc != SASL_OK && rc != SASL_NOTDONE ) {
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#ifdef NEW_LOGGING
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LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
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"slap_sasl_getdn: getprop(REALM) failed.\n" ));
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#else
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Debug(LDAP_DEBUG_TRACE,
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"getdn: getprop(REALM) failed!\n", 0,0,0);
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#endif
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ch_free( dn );
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*dnptr = NULL;
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return( LDAP_OPERATIONS_ERROR );
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}
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if( c && *c ) {
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len += strlen( c ) + strlen(",cn=" );
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}
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if( conn->c_sasl_bind_mech ) {
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len += strlen( conn->c_sasl_bind_mech ) + strlen( ",cn=" );
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}
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/* Build the new dn */
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c1 = dn;
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dn = ch_malloc( len );
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len = sprintf( dn, "dn:uid=%s", c1+2 );
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ch_free( c1 );
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if( c ) {
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len += sprintf( dn+len, ",cn=%s", c );
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}
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if( conn->c_sasl_bind_mech ) {
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len += sprintf( dn+len, ",cn=%s", conn->c_sasl_bind_mech );
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}
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strcpy( dn+len, ",cn=auth" );
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len += len1;
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#ifdef NEW_LOGGING
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LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
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"slap_sasl_getdn: u:id converted to %s.\n", dn ));
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#else
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Debug( LDAP_DEBUG_TRACE, "getdn: u:id converted to %s\n", dn,0,0 );
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#endif
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}
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/* DN strings that are a cn=auth identity to run through regexp */
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if( !strncasecmp( dn, "dn:", 3) && ( ( flags & FLAG_GETDN_FINAL ) == 0 ) ) {
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c1 = slap_sasl2dn( dn + 3 );
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if( c1 ) {
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ch_free( dn );
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dn = c1;
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/* Reaffix the dn: prefix if it was removed */
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if( strncasecmp( dn, "dn:", 3) ) {
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c1 = dn;
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dn = ch_malloc( strlen( c1 ) + 4 );
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sprintf( dn, "dn:%s", c1 );
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ch_free( c1 );
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}
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#ifdef NEW_LOGGING
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LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
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"slap_sasl_getdn: dn:id converted to %s.\n", dn ));
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#else
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Debug( LDAP_DEBUG_TRACE, "getdn: dn:id converted to %s\n", dn,0,0 );
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#endif
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}
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}
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if( ( flags & FLAG_GETDN_FINAL ) == 0 ) {
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dn_normalize( dn+3 );
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}
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*dnptr = dn;
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return( LDAP_SUCCESS );
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}
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static int
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slap_sasl_authorize(
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void *context,
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const char *authcid,
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const char *authzid,
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const char **user,
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const char **errstr)
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{
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char *authcDN, *authzDN;
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int rc;
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Connection *conn = context;
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*user = NULL;
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#ifdef NEW_LOGGING
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LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
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"slap_sas_authorize: conn %d authcid=\"%s\" authzid=\"%s\"\n",
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conn ? conn->c_connid : -1,
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authcid ? authcid : "<empty>",
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authzid ? authzid : "<empty>" ));
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#else
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Debug( LDAP_DEBUG_ARGS, "SASL Authorize [conn=%ld]: "
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"authcid=\"%s\" authzid=\"%s\"\n",
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(long) (conn ? conn->c_connid : -1),
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authcid ? authcid : "<empty>",
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authzid ? authzid : "<empty>" );
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#endif
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/* Convert the identities to DN's. If no authzid was given, client will
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be bound as the DN matching their username */
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rc = slap_sasl_getdn( conn, (char *)authcid, &authcDN, FLAG_GETDN_AUTHCID );
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if( rc != LDAP_SUCCESS ) {
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*errstr = ldap_err2string( rc );
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return SASL_NOAUTHZ;
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}
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if( ( authzid == NULL ) || !strcmp( authcid,authzid ) ) {
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#ifdef NEW_LOGGING
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LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
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"slap_sasl_authorize: conn %d Using authcDN=%s\n",
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conn ? conn->c_connid : -1, authcDN ));
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#else
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Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
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"Using authcDN=%s\n", (long) (conn ? conn->c_connid : -1), authcDN,0 );
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#endif
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*user = authcDN;
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*errstr = NULL;
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return SASL_OK;
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}
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rc = slap_sasl_getdn( conn, (char *)authzid, &authzDN, FLAG_GETDN_AUTHZID );
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if( rc != LDAP_SUCCESS ) {
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ch_free( authcDN );
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*errstr = ldap_err2string( rc );
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return SASL_NOAUTHZ;
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}
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rc = slap_sasl_authorized( authcDN, authzDN );
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if( rc ) {
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#ifdef NEW_LOGGING
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LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
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"slap_sasl_authorize: conn %ld authorization disallowed (%d)\n",
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(long)(conn ? conn->c_connid : -1), rc ));
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#else
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Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
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" authorization disallowed (%d)\n",
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(long) (conn ? conn->c_connid : -1), rc, 0 );
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#endif
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*errstr = "not authorized";
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ch_free( authcDN );
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ch_free( authzDN );
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return SASL_NOAUTHZ;
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}
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#ifdef NEW_LOGGING
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LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
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"slap_sasl_authorize: conn %d authorization allowed\n",
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(long)(conn ? conn->c_connid : -1 ) ));
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#else
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Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
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" authorization allowed\n",
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(long) (conn ? conn->c_connid : -1), 0, 0 );
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#endif
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ch_free( authcDN );
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*user = authzDN;
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*errstr = NULL;
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return SASL_OK;
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}
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static int
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slap_sasl_err2ldap( int saslerr )
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{
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int rc;
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switch (saslerr) {
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case SASL_CONTINUE:
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rc = LDAP_SASL_BIND_IN_PROGRESS;
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break;
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case SASL_FAIL:
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rc = LDAP_OTHER;
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break;
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case SASL_NOMEM:
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rc = LDAP_OTHER;
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break;
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case SASL_NOMECH:
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rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
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break;
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case SASL_BADAUTH:
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rc = LDAP_INVALID_CREDENTIALS;
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break;
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case SASL_NOAUTHZ:
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rc = LDAP_INSUFFICIENT_ACCESS;
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break;
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case SASL_TOOWEAK:
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case SASL_ENCRYPT:
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rc = LDAP_INAPPROPRIATE_AUTH;
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break;
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default:
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rc = LDAP_OTHER;
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break;
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}
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return rc;
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}
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#endif
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int slap_sasl_init( void )
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{
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#ifdef HAVE_CYRUS_SASL
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int rc;
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static sasl_callback_t server_callbacks[] = {
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{ SASL_CB_LOG, &slap_sasl_log, NULL },
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{ SASL_CB_LIST_END, NULL, NULL }
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};
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sasl_set_alloc(
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ch_malloc,
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ch_calloc,
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ch_realloc,
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ch_free );
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sasl_set_mutex(
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ldap_pvt_sasl_mutex_new,
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ldap_pvt_sasl_mutex_lock,
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ldap_pvt_sasl_mutex_unlock,
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ldap_pvt_sasl_mutex_dispose );
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/* should provide callbacks for logging */
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/* server name should be configurable */
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rc = sasl_server_init( server_callbacks, "slapd" );
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if( rc != SASL_OK ) {
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#ifdef NEW_LOGGING
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LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
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"slap_sasl_init: init failed.\n" ));
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#else
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Debug( LDAP_DEBUG_ANY, "sasl_server_init failed\n",
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0, 0, 0 );
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#endif
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return -1;
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}
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#ifdef NEW_LOGGING
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LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
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"slap_sasl_init: initialized!\n"));
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#else
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Debug( LDAP_DEBUG_TRACE, "slap_sasl_init: initialized!\n",
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0, 0, 0 );
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#endif
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/* default security properties */
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memset( &sasl_secprops, '\0', sizeof(sasl_secprops) );
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sasl_secprops.max_ssf = INT_MAX;
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sasl_secprops.maxbufsize = 65536;
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sasl_secprops.security_flags = SASL_SEC_NOPLAINTEXT|SASL_SEC_NOANONYMOUS;
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#endif
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return 0;
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}
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int slap_sasl_destroy( void )
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{
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#ifdef HAVE_CYRUS_SASL
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sasl_done();
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#endif
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return 0;
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}
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int slap_sasl_open( Connection *conn )
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{
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int sc = LDAP_SUCCESS;
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#ifdef HAVE_CYRUS_SASL
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sasl_conn_t *ctx = NULL;
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sasl_callback_t *session_callbacks;
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assert( conn->c_sasl_context == NULL );
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assert( conn->c_sasl_extra == NULL );
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conn->c_sasl_layers = 0;
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session_callbacks =
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ch_calloc( 3, sizeof(sasl_callback_t));
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conn->c_sasl_extra = session_callbacks;
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session_callbacks[0].id = SASL_CB_LOG;
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session_callbacks[0].proc = &slap_sasl_log;
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session_callbacks[0].context = conn;
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session_callbacks[1].id = SASL_CB_PROXY_POLICY;
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session_callbacks[1].proc = &slap_sasl_authorize;
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session_callbacks[1].context = conn;
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session_callbacks[2].id = SASL_CB_LIST_END;
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session_callbacks[2].proc = NULL;
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session_callbacks[2].context = NULL;
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if( global_host == NULL ) {
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global_host = ldap_pvt_get_fqdn( NULL );
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}
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/* create new SASL context */
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sc = sasl_server_new( "ldap", global_host, global_realm,
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session_callbacks, SASL_SECURITY_LAYER, &ctx );
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if( sc != SASL_OK ) {
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#ifdef NEW_LOGGING
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LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
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"slap_sasl_open: sasl_server_new failed: %d\n", sc ));
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#else
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Debug( LDAP_DEBUG_ANY, "sasl_server_new failed: %d\n",
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sc, 0, 0 );
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#endif
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return -1;
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}
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conn->c_sasl_context = ctx;
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if( sc == SASL_OK ) {
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sc = sasl_setprop( ctx,
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SASL_SEC_PROPS, &sasl_secprops );
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if( sc != SASL_OK ) {
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#ifdef NEW_LOGGING
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LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
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"slap_sasl_open: sasl_setprop failed: %d \n", sc ));
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#else
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Debug( LDAP_DEBUG_ANY, "sasl_setprop failed: %d\n",
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sc, 0, 0 );
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#endif
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slap_sasl_close( conn );
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return -1;
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}
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}
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sc = slap_sasl_err2ldap( sc );
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#endif
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return sc;
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}
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int slap_sasl_external(
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Connection *conn,
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slap_ssf_t ssf,
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const char *auth_id )
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{
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#ifdef HAVE_CYRUS_SASL
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int sc;
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sasl_conn_t *ctx = conn->c_sasl_context;
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sasl_external_properties_t extprops;
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if ( ctx == NULL ) {
|
|
return LDAP_UNAVAILABLE;
|
|
}
|
|
|
|
memset( &extprops, '\0', sizeof(extprops) );
|
|
extprops.ssf = ssf;
|
|
extprops.auth_id = (char *) auth_id;
|
|
|
|
sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
|
|
(void *) &extprops );
|
|
|
|
if ( sc != SASL_OK ) {
|
|
return LDAP_OTHER;
|
|
}
|
|
#endif
|
|
|
|
return LDAP_SUCCESS;
|
|
}
|
|
|
|
int slap_sasl_reset( Connection *conn )
|
|
{
|
|
#ifdef HAVE_CYRUS_SASL
|
|
sasl_conn_t *ctx = conn->c_sasl_context;
|
|
|
|
if( ctx != NULL ) {
|
|
}
|
|
#endif
|
|
/* must return "anonymous" */
|
|
return LDAP_SUCCESS;
|
|
}
|
|
|
|
char ** slap_sasl_mechs( Connection *conn )
|
|
{
|
|
char **mechs = NULL;
|
|
|
|
#ifdef HAVE_CYRUS_SASL
|
|
sasl_conn_t *ctx = conn->c_sasl_context;
|
|
|
|
if( ctx != NULL ) {
|
|
int sc;
|
|
char *mechstr;
|
|
|
|
sc = sasl_listmech( ctx,
|
|
NULL, NULL, ",", NULL,
|
|
&mechstr, NULL, NULL );
|
|
|
|
if( sc != SASL_OK ) {
|
|
#ifdef NEW_LOGGING
|
|
LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
|
|
"slap_sasl_mechs: sasl_listmech failed: %d\n", sc ));
|
|
#else
|
|
Debug( LDAP_DEBUG_ANY, "slap_sasl_listmech failed: %d\n",
|
|
sc, 0, 0 );
|
|
#endif
|
|
|
|
return NULL;
|
|
}
|
|
|
|
mechs = str2charray( mechstr, "," );
|
|
|
|
ch_free( mechstr );
|
|
}
|
|
#endif
|
|
|
|
return mechs;
|
|
}
|
|
|
|
int slap_sasl_close( Connection *conn )
|
|
{
|
|
#ifdef HAVE_CYRUS_SASL
|
|
sasl_conn_t *ctx = conn->c_sasl_context;
|
|
|
|
if( ctx != NULL ) {
|
|
sasl_dispose( &ctx );
|
|
}
|
|
|
|
conn->c_sasl_context = NULL;
|
|
|
|
free( conn->c_sasl_extra );
|
|
conn->c_sasl_extra = NULL;
|
|
#endif
|
|
|
|
return LDAP_SUCCESS;
|
|
}
|
|
|
|
int slap_sasl_bind(
|
|
Connection *conn,
|
|
Operation *op,
|
|
const char *dn,
|
|
const char *ndn,
|
|
struct berval *cred,
|
|
char **edn,
|
|
slap_ssf_t *ssfp )
|
|
{
|
|
int rc = 1;
|
|
|
|
#ifdef HAVE_CYRUS_SASL
|
|
sasl_conn_t *ctx = conn->c_sasl_context;
|
|
struct berval response;
|
|
unsigned reslen = 0;
|
|
const char *errstr;
|
|
int sc;
|
|
|
|
#ifdef NEW_LOGGING
|
|
LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
|
|
"sasl_bind: conn %ld dn=\"%s\" mech=%s datalen=%ld\n",
|
|
conn->c_connid, dn,
|
|
conn->c_sasl_bind_in_progress ? "<continuing>" : conn->c_sasl_bind_mech,
|
|
cred ? cred->bv_len : 0 ));
|
|
#else
|
|
Debug(LDAP_DEBUG_ARGS,
|
|
"==> sasl_bind: dn=\"%s\" mech=%s datalen=%ld\n", dn,
|
|
conn->c_sasl_bind_in_progress ? "<continuing>":conn->c_sasl_bind_mech,
|
|
cred ? cred->bv_len : 0 );
|
|
#endif
|
|
|
|
|
|
if( ctx == NULL ) {
|
|
send_ldap_result( conn, op, LDAP_UNAVAILABLE,
|
|
NULL, "SASL unavailable on this session", NULL, NULL );
|
|
return rc;
|
|
}
|
|
|
|
if ( !conn->c_sasl_bind_in_progress ) {
|
|
sc = sasl_server_start( ctx,
|
|
conn->c_sasl_bind_mech,
|
|
cred->bv_len ? cred->bv_val : "",
|
|
cred->bv_len,
|
|
(char **)&response.bv_val, &reslen, &errstr );
|
|
|
|
} else {
|
|
sc = sasl_server_step( ctx,
|
|
cred->bv_val, cred->bv_len,
|
|
(char **)&response.bv_val, &reslen, &errstr );
|
|
}
|
|
|
|
response.bv_len = reslen;
|
|
|
|
if ( sc == SASL_OK ) {
|
|
char *username = NULL;
|
|
|
|
sc = sasl_getprop( ctx,
|
|
SASL_USERNAME, (void **)&username );
|
|
|
|
if ( sc != SASL_OK ) {
|
|
#ifdef NEW_LOGGING
|
|
LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
|
|
"slap_sasl_bind: getprop(USERNAME) failed: %d\n", sc ));
|
|
#else
|
|
Debug(LDAP_DEBUG_TRACE,
|
|
"slap_sasl_bind: getprop(USERNAME) failed!\n",
|
|
0, 0, 0);
|
|
#endif
|
|
|
|
|
|
send_ldap_result( conn, op, rc = slap_sasl_err2ldap( sc ),
|
|
NULL, "no SASL username", NULL, NULL );
|
|
|
|
} else {
|
|
rc = slap_sasl_getdn( conn, username, edn, FLAG_GETDN_FINAL );
|
|
|
|
if( rc == LDAP_SUCCESS ) {
|
|
int i;
|
|
sasl_ssf_t *ssf = NULL;
|
|
(void) sasl_getprop( ctx, SASL_SSF, (void *)&ssf );
|
|
*ssfp = ssf ? *ssf : 0;
|
|
|
|
if( *ssfp ) {
|
|
ldap_pvt_thread_mutex_lock( &conn->c_mutex );
|
|
conn->c_sasl_layers++;
|
|
ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
|
|
}
|
|
|
|
/* Store the authorization DN as a subjectDN */
|
|
if ( *edn ) {
|
|
i = 2;
|
|
do {
|
|
i++;
|
|
(*edn)[i-3] = (*edn)[i];
|
|
} while( (*edn)[i] );
|
|
}
|
|
|
|
send_ldap_sasl( conn, op, rc,
|
|
NULL, NULL, NULL, NULL,
|
|
response.bv_len ? &response : NULL );
|
|
|
|
} else {
|
|
send_ldap_result( conn, op, rc,
|
|
NULL, errstr, NULL, NULL );
|
|
}
|
|
}
|
|
|
|
} else if ( sc == SASL_CONTINUE ) {
|
|
send_ldap_sasl( conn, op, rc = LDAP_SASL_BIND_IN_PROGRESS,
|
|
NULL, NULL, NULL, NULL, &response );
|
|
|
|
} else {
|
|
send_ldap_result( conn, op, rc = slap_sasl_err2ldap( sc ),
|
|
NULL, errstr, NULL, NULL );
|
|
}
|
|
|
|
if( response.bv_len ) {
|
|
ch_free( response.bv_val );
|
|
}
|
|
|
|
#ifdef NEW_LOGGING
|
|
LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
|
|
"slap_sasl_bind: rc=%d\n", rc ));
|
|
#else
|
|
Debug(LDAP_DEBUG_TRACE, "<== slap_sasl_bind: rc=%d\n", rc, 0, 0);
|
|
#endif
|
|
|
|
|
|
#else
|
|
send_ldap_result( conn, op, rc = LDAP_UNAVAILABLE,
|
|
NULL, "SASL not supported", NULL, NULL );
|
|
#endif
|
|
|
|
return rc;
|
|
}
|
|
|
|
char* slap_sasl_secprops( const char *in )
|
|
{
|
|
#ifdef HAVE_CYRUS_SASL
|
|
int rc = ldap_pvt_sasl_secprops( in, &sasl_secprops );
|
|
|
|
return rc == LDAP_SUCCESS ? NULL : "Invalid security properties";
|
|
#else
|
|
return "SASL not supported";
|
|
#endif
|
|
}
|