]> git.sur5r.net Git - openldap/blobdiff - libraries/libldap/cyrus.c
#include <ac/unistd.h>, to get geteuid() and getegid().
[openldap] / libraries / libldap / cyrus.c
index c6058fca2a2488bc9e57028229442dda5576f364..1816d8d7c386129a2bb9064c22f59be30265a0cf 100644 (file)
@@ -1,34 +1,45 @@
 /* $OpenLDAP$ */
 /*
- * Copyright 1999-2000 The OpenLDAP Foundation, All Rights Reserved.
+ * Copyright 1999-2003 The OpenLDAP Foundation, All Rights Reserved.
  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
  */
 
 #include "portable.h"
 
-#include <stdlib.h>
 #include <stdio.h>
 
 #include <ac/socket.h>
+#include <ac/stdlib.h>
 #include <ac/string.h>
 #include <ac/time.h>
 #include <ac/errno.h>
+#include <ac/ctype.h>
+#include <ac/unistd.h>
 
 #include "ldap-int.h"
+
+#ifdef HAVE_CYRUS_SASL
+
 #ifdef LDAP_R_COMPILE
-#include "ldap_pvt_thread.h"
+ldap_pvt_thread_mutex_t ldap_int_sasl_mutex;
 #endif
 
-#ifdef HAVE_CYRUS_SASL
+#ifdef HAVE_SASL_SASL_H
+#include <sasl/sasl.h>
+#else
 #include <sasl.h>
+#endif
+
+#if SASL_VERSION_MAJOR >= 2
+#define SASL_CONST const
+#else
+#define SASL_CONST
+#endif
 
 /*
 * Various Cyrus SASL related stuff.
 */
 
-#define SASL_MAX_BUFF_SIZE     65536
-#define SASL_MIN_BUFF_SIZE     4096
-
 int ldap_int_sasl_init( void )
 {
        /* XXX not threadsafe */
@@ -46,11 +57,41 @@ int ldap_int_sasl_init( void )
                { SASL_CB_LIST_END, NULL, NULL }
        };
 
+#ifdef HAVE_SASL_VERSION
+       /* stringify the version number, sasl.h doesn't do it for us */
+#define VSTR0(maj, min, pat)   #maj "." #min "." #pat
+#define VSTR(maj, min, pat)    VSTR0(maj, min, pat)
+#define SASL_VERSION_STRING    VSTR(SASL_VERSION_MAJOR, SASL_VERSION_MINOR, \
+                               SASL_VERSION_STEP)
+       { int rc;
+       sasl_version( NULL, &rc );
+       if ( ((rc >> 16) != ((SASL_VERSION_MAJOR << 8)|SASL_VERSION_MINOR)) ||
+               (rc & 0xffff) < SASL_VERSION_STEP) {
+               char version[sizeof("xxx.xxx.xxxxx")];
+               sprintf( version, "%u.%d.%d", (unsigned)rc >> 24, (rc >> 16) & 0xff,
+                       rc & 0xffff );
+
+#ifdef NEW_LOGGING
+               LDAP_LOG( TRANSPORT, INFO,
+               "ldap_int_sasl_init: SASL library version mismatch:"
+               " expected " SASL_VERSION_STRING ","
+               " got %s\n", version, 0, 0 );
+#else
+               Debug( LDAP_DEBUG_ANY,
+               "ldap_int_sasl_init: SASL library version mismatch:"
+               " expected " SASL_VERSION_STRING ","
+               " got %s\n", version, 0, 0 );
+#endif
+               return -1;
+       }
+       }
+#endif
        if ( sasl_initialized ) {
                return 0;
        }
 
-#ifndef CSRIMALLOC
+/* SASL 2 takes care of its own memory completely internally */
+#if SASL_VERSION_MAJOR < 2 && !defined(CSRIMALLOC)
        sasl_set_alloc(
                ber_memalloc,
                ber_memcalloc,
@@ -64,6 +105,8 @@ int ldap_int_sasl_init( void )
                ldap_pvt_sasl_mutex_lock,
                ldap_pvt_sasl_mutex_unlock,    
                ldap_pvt_sasl_mutex_dispose );    
+
+       ldap_pvt_thread_mutex_init( &ldap_int_sasl_mutex );
 #endif
 
        if ( sasl_client_init( client_callbacks ) == SASL_OK ) {
@@ -71,6 +114,10 @@ int ldap_int_sasl_init( void )
                return 0;
        }
 
+#if SASL_VERSION_MAJOR < 2
+       /* A no-op to make sure we link with Cyrus 1.5 */
+       sasl_client_auth( NULL, NULL, NULL, 0, NULL, NULL );
+#endif
        return -1;
 }
 
@@ -80,6 +127,7 @@ int ldap_int_sasl_init( void )
 
 struct sb_sasl_data {
        sasl_conn_t             *sasl_context;
+       unsigned                *sasl_maxbuf;
        Sockbuf_Buf             sec_buf_in;
        Sockbuf_Buf             buf_in;
        Sockbuf_Buf             buf_out;
@@ -100,10 +148,13 @@ sb_sasl_setup( Sockbuf_IO_Desc *sbiod, void *arg )
        ber_pvt_sb_buf_init( &p->buf_in );
        ber_pvt_sb_buf_init( &p->buf_out );
        if ( ber_pvt_sb_grow_buffer( &p->sec_buf_in, SASL_MIN_BUFF_SIZE ) < 0 ) {
+               LBER_FREE( p );
                errno = ENOMEM;
                return -1;
        }
-
+       sasl_getprop( p->sasl_context, SASL_MAXOUTBUF,
+               (SASL_CONST void **) &p->sasl_maxbuf );
+           
        sbiod->sbiod_pvt = p;
 
        return 0;
@@ -117,6 +168,14 @@ sb_sasl_remove( Sockbuf_IO_Desc *sbiod )
        assert( sbiod != NULL );
        
        p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
+#if SASL_VERSION_MAJOR >= 2
+       /*
+        * SASLv2 encode/decode buffers are managed by
+        * libsasl2. Ensure they are not freed by liblber.
+        */
+       p->buf_in.buf_base = NULL;
+       p->buf_out.buf_base = NULL;
+#endif
        ber_pvt_sb_buf_destroy( &p->sec_buf_in );
        ber_pvt_sb_buf_destroy( &p->buf_in );
        ber_pvt_sb_buf_destroy( &p->buf_out );
@@ -126,15 +185,16 @@ sb_sasl_remove( Sockbuf_IO_Desc *sbiod )
 }
 
 static ber_len_t
-sb_sasl_pkt_length( const char *buf, int debuglevel )
+sb_sasl_pkt_length( const unsigned char *buf, unsigned max, int debuglevel )
 {
        ber_len_t               size;
-       long                    tmp;
 
        assert( buf != NULL );
 
-       tmp = *((long *)buf);
-       size = ntohl( tmp );
+       size = buf[0] << 24
+               | buf[1] << 16
+               | buf[2] << 8
+               | buf[3];
    
        if ( size > SASL_MAX_BUFF_SIZE ) {
                /* somebody is trying to mess me up. */
@@ -142,25 +202,25 @@ sb_sasl_pkt_length( const char *buf, int debuglevel )
                        "sb_sasl_pkt_length: received illegal packet length "
                        "of %lu bytes\n", (unsigned long)size );      
                size = 16; /* this should lead to an error. */
-}
+       }
 
        return size + 4; /* include the size !!! */
 }
 
 /* Drop a processed packet from the input buffer */
 static void
-sb_sasl_drop_packet ( Sockbuf_Buf *sec_buf_in, int debuglevel )
+sb_sasl_drop_packet ( Sockbuf_Buf *sec_buf_in, unsigned max, int debuglevel )
 {
        ber_slen_t                      len;
 
        len = sec_buf_in->buf_ptr - sec_buf_in->buf_end;
        if ( len > 0 )
-               memmove( sec_buf_in->buf_base, sec_buf_in->buf_base +
+               AC_MEMCPY( sec_buf_in->buf_base, sec_buf_in->buf_base +
                        sec_buf_in->buf_end, len );
    
        if ( len >= 4 ) {
-               sec_buf_in->buf_end = sb_sasl_pkt_length( sec_buf_in->buf_base,
-                       debuglevel);
+               sec_buf_in->buf_end = sb_sasl_pkt_length(
+                       (unsigned char *) sec_buf_in->buf_base, max, debuglevel);
        }
        else {
                sec_buf_in->buf_end = 0;
@@ -187,7 +247,11 @@ sb_sasl_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
        if ( len == 0 )
                return bufptr;
 
+#if SASL_VERSION_MAJOR >= 2
+       ber_pvt_sb_buf_init( &p->buf_in );
+#else
        ber_pvt_sb_buf_destroy( &p->buf_in );
+#endif
 
        /* Read the length of the packet */
        while ( p->sec_buf_in.buf_ptr < 4 ) {
@@ -198,18 +262,19 @@ sb_sasl_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
                        continue;
 #endif
                if ( ret <= 0 )
-                       return ret;
+                       return bufptr ? bufptr : ret;
 
                p->sec_buf_in.buf_ptr += ret;
        }
 
        /* The new packet always starts at p->sec_buf_in.buf_base */
-       ret = sb_sasl_pkt_length( p->sec_buf_in.buf_base,
-               sbiod->sbiod_sb->sb_debug );
+       ret = sb_sasl_pkt_length( (unsigned char *) p->sec_buf_in.buf_base,
+               *p->sasl_maxbuf, sbiod->sbiod_sb->sb_debug );
 
        /* Grow the packet buffer if neccessary */
-       if ( ( p->sec_buf_in.buf_size < ret ) && 
-                       ber_pvt_sb_grow_buffer( &p->sec_buf_in, ret ) < 0 ) {
+       if ( ( p->sec_buf_in.buf_size < (ber_len_t) ret ) && 
+               ber_pvt_sb_grow_buffer( &p->sec_buf_in, ret ) < 0 )
+       {
                errno = ENOMEM;
                return -1;
        }
@@ -227,28 +292,29 @@ sb_sasl_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
                        continue;
 #endif
                if ( ret <= 0 )
-                       return ret;
+                       return bufptr ? bufptr : ret;
 
                p->sec_buf_in.buf_ptr += ret;
        }
 
        /* Decode the packet */
        ret = sasl_decode( p->sasl_context, p->sec_buf_in.buf_base,
-               p->sec_buf_in.buf_end, &p->buf_in.buf_base,
+               p->sec_buf_in.buf_end,
+               (SASL_CONST char **)&p->buf_in.buf_base,
                (unsigned *)&p->buf_in.buf_end );
+
+       /* Drop the packet from the input buffer */
+       sb_sasl_drop_packet( &p->sec_buf_in,
+                       *p->sasl_maxbuf, sbiod->sbiod_sb->sb_debug );
+
        if ( ret != SASL_OK ) {
                ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug,
                        "sb_sasl_read: failed to decode packet: %s\n",
                        sasl_errstring( ret, NULL, NULL ) );
-               sb_sasl_drop_packet( &p->sec_buf_in,
-                       sbiod->sbiod_sb->sb_debug );
                errno = EIO;
                return -1;
        }
        
-       /* Drop the packet from the input buffer */
-       sb_sasl_drop_packet( &p->sec_buf_in, sbiod->sbiod_sb->sb_debug );
-
        p->buf_in.buf_size = p->buf_in.buf_end;
 
        bufptr += ber_pvt_sb_copy_out( &p->buf_in, (char*) buf + bufptr, len );
@@ -270,13 +336,28 @@ sb_sasl_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
        /* Are there anything left in the buffer? */
        if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) {
                ret = ber_pvt_sb_do_write( sbiod, &p->buf_out );
-               if ( ret <= 0 )
+               if ( ret < 0 )
                        return ret;
+               /* Still have something left?? */
+               if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) {
+                       errno = EAGAIN;
+                       return 0;
+               }
        }
 
        /* now encode the next packet. */
+#if SASL_VERSION_MAJOR >= 2
+       ber_pvt_sb_buf_init( &p->buf_out );
+       /* sasl v2 makes sure this number is correct */
+       if ( len > *p->sasl_maxbuf )
+               len = *p->sasl_maxbuf;
+#else
        ber_pvt_sb_buf_destroy( &p->buf_out );
-       ret = sasl_encode( p->sasl_context, buf, len, &p->buf_out.buf_base,
+       if ( len > *p->sasl_maxbuf - 100 )
+               len = *p->sasl_maxbuf - 100;    /* For safety margin */
+#endif
+       ret = sasl_encode( p->sasl_context, buf, len,
+               (SASL_CONST char **)&p->buf_out.buf_base,
                (unsigned *)&p->buf_out.buf_size );
        if ( ret != SASL_OK ) {
                ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug,
@@ -318,19 +399,39 @@ Sockbuf_IO ldap_pvt_sockbuf_io_sasl = {
 
 int ldap_pvt_sasl_install( Sockbuf *sb, void *ctx_arg )
 {
+#ifdef NEW_LOGGING
+       LDAP_LOG ( TRANSPORT, ENTRY, "ldap_pvt_sasl_install\n", 0, 0, 0 );
+#else
        Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_install\n",
                0, 0, 0 );
+#endif
 
        /* don't install the stuff unless security has been negotiated */
 
        if ( !ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO,
                        &ldap_pvt_sockbuf_io_sasl ) )
+       {
+#ifdef LDAP_DEBUG
+               ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
+                       LBER_SBIOD_LEVEL_APPLICATION, (void *)"sasl_" );
+#endif
                ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_sasl,
                        LBER_SBIOD_LEVEL_APPLICATION, ctx_arg );
+       }
 
        return LDAP_SUCCESS;
 }
 
+void ldap_pvt_sasl_remove( Sockbuf *sb )
+{
+       ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_sasl,
+               LBER_SBIOD_LEVEL_APPLICATION );
+#ifdef LDAP_DEBUG
+       ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
+               LBER_SBIOD_LEVEL_APPLICATION );
+#endif
+}
+
 static int
 sasl_err2ldap( int saslerr )
 {
@@ -340,6 +441,9 @@ sasl_err2ldap( int saslerr )
                case SASL_CONTINUE:
                        rc = LDAP_MORE_RESULTS_TO_RETURN;
                        break;
+               case SASL_INTERACT:
+                       rc = LDAP_LOCAL_ERROR;
+                       break;
                case SASL_OK:
                        rc = LDAP_SUCCESS;
                        break;
@@ -375,74 +479,57 @@ int
 ldap_int_sasl_open(
        LDAP *ld, 
        LDAPConn *lc,
-       const char * host,
-       ber_len_t ssf )
+       const char * host )
 {
        int rc;
        sasl_conn_t *ctx;
 
-       sasl_callback_t *session_callbacks =
-               ber_memcalloc( 2, sizeof( sasl_callback_t ) );
-
-       if( session_callbacks == NULL ) return LDAP_NO_MEMORY;
-
-       session_callbacks[0].id = SASL_CB_USER;
-       session_callbacks[0].proc = NULL;
-       session_callbacks[0].context = ld;
-
-       session_callbacks[1].id = SASL_CB_LIST_END;
-       session_callbacks[1].proc = NULL;
-       session_callbacks[1].context = NULL;
-
-       assert( lc->lconn_sasl_ctx == NULL );
+       assert( lc->lconn_sasl_authctx == NULL );
 
        if ( host == NULL ) {
-               ld->ld_errno = LDAP_UNAVAILABLE;
+               ld->ld_errno = LDAP_LOCAL_ERROR;
                return ld->ld_errno;
        }
 
-       rc = sasl_client_new( "ldap", host,
-               session_callbacks,
-#ifdef LDAP_SASL_SECURITY_LAYER
-               SASL_SECURITY_LAYER,
+#if SASL_VERSION_MAJOR >= 2
+       rc = sasl_client_new( "ldap", host, NULL, NULL,
+               NULL, 0, &ctx );
 #else
-               0,
+       rc = sasl_client_new( "ldap", host, NULL,
+               SASL_SECURITY_LAYER, &ctx );
 #endif
-               &ctx );
 
        if ( rc != SASL_OK ) {
                ld->ld_errno = sasl_err2ldap( rc );
                return ld->ld_errno;
        }
 
-       Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: %s\n",
+#ifdef NEW_LOGGING
+       LDAP_LOG ( TRANSPORT, DETAIL1, "ldap_int_sasl_open: host=%s\n", 
                host, 0, 0 );
+#else
+       Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: host=%s\n",
+               host, 0, 0 );
+#endif
 
-       lc->lconn_sasl_ctx = ctx;
-
-       if( ssf ) {
-               sasl_external_properties_t extprops;
-               memset(&extprops, 0L, sizeof(extprops));
-               extprops.ssf = ssf;
-
-               (void) sasl_setprop( ctx, SASL_SSF_EXTERNAL,
-                       (void *) &extprops );
-
-               Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: ssf=%ld\n",
-                       (long) ssf, 0, 0 );
-       }
+       lc->lconn_sasl_authctx = ctx;
 
        return LDAP_SUCCESS;
 }
 
 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
 {
-       sasl_conn_t *ctx = lc->lconn_sasl_ctx;
-       assert( ctx != NULL );
+       sasl_conn_t *ctx = lc->lconn_sasl_authctx;
 
-       if( ctx ) {
+       if( ctx != NULL ) {
                sasl_dispose( &ctx );
-               lc->lconn_sasl_ctx = NULL;
+               if ( lc->lconn_sasl_sockctx &&
+                       lc->lconn_sasl_authctx != lc->lconn_sasl_sockctx ) {
+                       ctx = lc->lconn_sasl_sockctx;
+                       sasl_dispose( &ctx );
+               }
+               lc->lconn_sasl_sockctx = NULL;
+               lc->lconn_sasl_authctx = NULL;
        }
 
        return LDAP_SUCCESS;
@@ -455,6 +542,7 @@ ldap_int_sasl_bind(
        const char              *mechs,
        LDAPControl             **sctrls,
        LDAPControl             **cctrls,
+       unsigned                flags,
        LDAP_SASL_INTERACT_PROC *interact,
        void * defaults )
 {
@@ -463,14 +551,20 @@ ldap_int_sasl_bind(
        const char *pmech = NULL;
        int                     saslrc, rc;
        sasl_ssf_t              *ssf = NULL;
-       sasl_conn_t     *ctx;
+       sasl_conn_t     *ctx, *oldctx = NULL;
        sasl_interact_t *prompts = NULL;
        unsigned credlen;
-       struct berval ccred, *scred;
+       struct berval ccred;
        ber_socket_t            sd;
+       void    *ssl;
 
+#ifdef NEW_LOGGING
+       LDAP_LOG ( TRANSPORT, ARGS, "ldap_int_sasl_bind: %s\n", 
+               mechs ? mechs : "<null>", 0, 0 );
+#else
        Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_bind: %s\n",
                mechs ? mechs : "<null>", 0, 0 );
+#endif
 
        /* do a quick !LDAPv3 check... ldap_sasl_bind will do the rest. */
        if (ld->ld_version < LDAP_VERSION3) {
@@ -482,22 +576,59 @@ ldap_int_sasl_bind(
 
        if ( sd == AC_SOCKET_INVALID ) {
                /* not connected yet */
-               int rc = ldap_open_defconn( ld );
-  
+               int rc;
+
+               rc = ldap_open_defconn( ld );
                if( rc < 0 ) return ld->ld_errno;
+
                ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 
                if( sd == AC_SOCKET_INVALID ) {
-                       ld->ld_errno = LDAP_UNAVAILABLE;
+                       ld->ld_errno = LDAP_LOCAL_ERROR;
                        return ld->ld_errno;
                }
        }   
 
-       ctx = ld->ld_defconn->lconn_sasl_ctx;
+       oldctx = ld->ld_defconn->lconn_sasl_authctx;
 
-       if( ctx == NULL ) {
-               ld->ld_errno = LDAP_UNAVAILABLE;
-               return ld->ld_errno;
+       /* If we already have an authentication context, clear it out */
+       if( oldctx ) {
+               if ( oldctx != ld->ld_defconn->lconn_sasl_sockctx ) {
+                       sasl_dispose( &oldctx );
+               }
+               ld->ld_defconn->lconn_sasl_authctx = NULL;
+       }
+
+       rc = ldap_int_sasl_open( ld, ld->ld_defconn,
+               ld->ld_defconn->lconn_server->lud_host ?
+               ld->ld_defconn->lconn_server->lud_host : "localhost" );
+
+       if ( rc != LDAP_SUCCESS ) return rc;
+
+       ctx = ld->ld_defconn->lconn_sasl_authctx;
+
+       /* Check for TLS */
+       ssl = ldap_pvt_tls_sb_ctx( ld->ld_sb );
+       if ( ssl ) {
+               struct berval authid = { 0, NULL };
+               ber_len_t fac;
+
+               fac = ldap_pvt_tls_get_strength( ssl );
+               /* failure is OK, we just can't use SASL EXTERNAL */
+               (void) ldap_pvt_tls_get_my_dn( ssl, &authid, NULL, 0 );
+
+               (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid.bv_val, fac );
+               LDAP_FREE( authid.bv_val );
+       }
+
+       /* Check for local */
+       if ( ldap_pvt_url_scheme2proto( ld->ld_defconn->lconn_server->lud_scheme ) == LDAP_PROTO_IPC ) {
+               char authid[sizeof("uidNumber=4294967295+gidNumber=4294967295,"
+                       "cn=peercred,cn=external,cn=auth")];
+               sprintf( authid, "uidNumber=%d+gidNumber=%d,"
+                       "cn=peercred,cn=external,cn=auth",
+                       (int) geteuid(), (int) getegid() );
+               (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid, LDAP_PVT_SASL_LOCAL_SSF );
        }
 
        /* (re)set security properties */
@@ -510,75 +641,117 @@ ldap_int_sasl_bind(
        do {
                saslrc = sasl_client_start( ctx,
                        mechs,
+#if SASL_VERSION_MAJOR < 2
                        NULL,
+#endif
                        &prompts,
-                       &ccred.bv_val,
+                       (SASL_CONST char **)&ccred.bv_val,
                        &credlen,
                        &mech );
 
                if( pmech == NULL && mech != NULL ) {
                        pmech = mech;
 
-                       fprintf(stderr,
-                               "SASL/%s authentication started\n",
-                               pmech );
+                       if( flags != LDAP_SASL_QUIET ) {
+                               fprintf(stderr,
+                                       "SASL/%s authentication started\n",
+                                       pmech );
+                       }
                }
 
                if( saslrc == SASL_INTERACT ) {
+                       int res;
                        if( !interact ) break;
-                       rc = (interact)( ld, defaults, prompts );
-                       if( rc != LDAP_SUCCESS ) {
-                               break;
-                       }
+                       res = (interact)( ld, flags, defaults, prompts );
+
+                       if( res != LDAP_SUCCESS ) break;
                }
        } while ( saslrc == SASL_INTERACT );
 
        ccred.bv_len = credlen;
 
        if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
-               ld->ld_errno = sasl_err2ldap( saslrc );
-               return ld->ld_errno;
+               rc = ld->ld_errno = sasl_err2ldap( saslrc );
+#if SASL_VERSION_MAJOR >= 2
+               ld->ld_error = LDAP_STRDUP( sasl_errdetail( ctx ) );
+#endif
+               goto done;
        }
 
-       scred = NULL;
-
        do {
+               struct berval *scred;
                unsigned credlen;
 
-               rc = ldap_sasl_bind_s( ld, dn, mech, &ccred, sctrls, cctrls, &scred );
+               scred = NULL;
 
-               if ( rc == LDAP_SUCCESS ) {
-                       break;
-               } else if ( rc != LDAP_SASL_BIND_IN_PROGRESS ) {
-                       if ( ccred.bv_val != NULL ) {
-                               LDAP_FREE( ccred.bv_val );
-                       }
-                       return ld->ld_errno;
-               }
+               rc = ldap_sasl_bind_s( ld, dn, mech, &ccred, sctrls, cctrls, &scred );
 
                if ( ccred.bv_val != NULL ) {
+#if SASL_VERSION_MAJOR < 2
                        LDAP_FREE( ccred.bv_val );
+#endif
                        ccred.bv_val = NULL;
                }
 
+               if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
+                       if( scred && scred->bv_len ) {
+                               /* and server provided us with data? */
+#ifdef NEW_LOGGING
+                               LDAP_LOG ( TRANSPORT, DETAIL1, 
+                                       "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n", 
+                                       rc, saslrc, scred->bv_len );
+#else
+                               Debug( LDAP_DEBUG_TRACE,
+                                       "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
+                                       rc, saslrc, scred->bv_len );
+#endif
+                               ber_bvfree( scred );
+                       }
+                       rc = ld->ld_errno;
+                       goto done;
+               }
+
+               if( rc == LDAP_SUCCESS && saslrc == SASL_OK ) {
+                       /* we're done, no need to step */
+                       if( scred && scred->bv_len ) {
+                               /* but server provided us with data! */
+#ifdef NEW_LOGGING
+                               LDAP_LOG ( TRANSPORT, DETAIL1, 
+                                       "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n", 
+                                       rc, saslrc, scred->bv_len );
+#else
+                               Debug( LDAP_DEBUG_TRACE,
+                                       "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
+                                       rc, saslrc, scred->bv_len );
+#endif
+                               ber_bvfree( scred );
+                               rc = ld->ld_errno = LDAP_LOCAL_ERROR;
+                               goto done;
+                       }
+                       break;
+               }
+
                do {
                        saslrc = sasl_client_step( ctx,
                                (scred == NULL) ? NULL : scred->bv_val,
                                (scred == NULL) ? 0 : scred->bv_len,
                                &prompts,
-                               &ccred.bv_val,
+                               (SASL_CONST char **)&ccred.bv_val,
                                &credlen );
 
-                       Debug( LDAP_DEBUG_TRACE, "sasl_client_start: %d\n",
+#ifdef NEW_LOGGING
+                               LDAP_LOG ( TRANSPORT, DETAIL1, 
+                                       "ldap_int_sasl_bind: sasl_client_step: %d\n", saslrc,0,0 );
+#else
+                       Debug( LDAP_DEBUG_TRACE, "sasl_client_step: %d\n",
                                saslrc, 0, 0 );
+#endif
 
                        if( saslrc == SASL_INTERACT ) {
                                int res;
                                if( !interact ) break;
-                               res = (interact)( ld, defaults, prompts );
-                               if( res != LDAP_SUCCESS ) {
-                                       break;
-                               }
+                               res = (interact)( ld, flags, defaults, prompts );
+                               if( res != LDAP_SUCCESS ) break;
                        }
                } while ( saslrc == SASL_INTERACT );
 
@@ -587,40 +760,104 @@ ldap_int_sasl_bind(
 
                if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
                        ld->ld_errno = sasl_err2ldap( saslrc );
-                       return ld->ld_errno;
+#if SASL_VERSION_MAJOR >= 2
+                       ld->ld_error = LDAP_STRDUP( sasl_errdetail( ctx ) );
+#endif
+                       rc = ld->ld_errno;
+                       goto done;
                }
        } while ( rc == LDAP_SASL_BIND_IN_PROGRESS );
 
-       assert ( rc == LDAP_SUCCESS );
+       if ( rc != LDAP_SUCCESS ) goto done;
 
-       /* likely should add a quiet option */
-
-       saslrc = sasl_getprop( ctx, SASL_USERNAME, (void **) &data );
-       if( saslrc == SASL_OK ) {
-               fprintf( stderr, "SASL username: %s\n", data );
+       if ( saslrc != SASL_OK ) {
+#if SASL_VERSION_MAJOR >= 2
+               ld->ld_error = LDAP_STRDUP( sasl_errdetail( ctx ) );
+#endif
+               rc = ld->ld_errno = sasl_err2ldap( saslrc );
+               goto done;
        }
 
-       saslrc = sasl_getprop( ctx, SASL_REALM, (void **) &data );
-       if( saslrc == SASL_OK ) {
-               fprintf( stderr, "SASL realm: %s\n", data );
+       if( flags != LDAP_SASL_QUIET ) {
+               saslrc = sasl_getprop( ctx, SASL_USERNAME, (SASL_CONST void **) &data );
+               if( saslrc == SASL_OK && data && *data ) {
+                       fprintf( stderr, "SASL username: %s\n", data );
+               }
+
+#if SASL_VERSION_MAJOR < 2
+               saslrc = sasl_getprop( ctx, SASL_REALM, (SASL_CONST void **) &data );
+               if( saslrc == SASL_OK && data && *data ) {
+                       fprintf( stderr, "SASL realm: %s\n", data );
+               }
+#endif
        }
 
-       saslrc = sasl_getprop( ctx, SASL_SSF, (void **) &ssf );
+       saslrc = sasl_getprop( ctx, SASL_SSF, (SASL_CONST void **) &ssf );
        if( saslrc == SASL_OK ) {
-               fprintf( stderr, "SASL SSF: %lu\n",
-                       (unsigned long) *ssf );
+               if( flags != LDAP_SASL_QUIET ) {
+                       fprintf( stderr, "SASL SSF: %lu\n",
+                               (unsigned long) *ssf );
+               }
 
-#ifdef LDAP_SASL_SECURITY_LAYER
                if( ssf && *ssf ) {
-                       fprintf( stderr, "SASL installing layers\n" );
-                       ldap_pvt_sasl_install( ld->ld_sb, ctx );
+                       if( flags != LDAP_SASL_QUIET ) {
+                               fprintf( stderr, "SASL installing layers\n" );
+                       }
+                       if ( ld->ld_defconn->lconn_sasl_sockctx ) {
+                               oldctx = ld->ld_defconn->lconn_sasl_sockctx;
+                               sasl_dispose( &oldctx );
+                               ldap_pvt_sasl_remove( ld->ld_sb );
+                       }
+                       ldap_pvt_sasl_install( ld->ld_conns->lconn_sb, ctx );
+                       ld->ld_defconn->lconn_sasl_sockctx = ctx;
                }
-#endif
        }
+       ld->ld_defconn->lconn_sasl_authctx = ctx;
 
+done:
        return rc;
 }
 
+int
+ldap_int_sasl_external(
+       LDAP *ld,
+       LDAPConn *conn,
+       const char * authid,
+       ber_len_t ssf )
+{
+       int sc;
+       sasl_conn_t *ctx;
+#if SASL_VERSION_MAJOR < 2
+       sasl_external_properties_t extprops;
+#endif
+
+       ctx = conn->lconn_sasl_authctx;
+
+       if ( ctx == NULL ) {
+               return LDAP_LOCAL_ERROR;
+       }
+   
+#if SASL_VERSION_MAJOR >= 2
+       sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
+       if ( sc == SASL_OK )
+               sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
+#else
+       memset( &extprops, '\0', sizeof(extprops) );
+       extprops.ssf = ssf;
+       extprops.auth_id = (char *) authid;
+
+       sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
+               (void *) &extprops );
+#endif
+
+       if ( sc != SASL_OK ) {
+               return LDAP_LOCAL_ERROR;
+       }
+
+       return LDAP_SUCCESS;
+}
+
+
 int ldap_pvt_sasl_secprops(
        const char *in,
        sasl_security_properties_t *secprops )
@@ -629,11 +866,11 @@ int ldap_pvt_sasl_secprops(
        char **props = ldap_str2charray( in, "," );
        unsigned sflags = 0;
        int got_sflags = 0;
-       sasl_ssf_t max_ssf;
+       sasl_ssf_t max_ssf = 0;
        int got_max_ssf = 0;
-       sasl_ssf_t min_ssf;
+       sasl_ssf_t min_ssf = 0;
        int got_min_ssf = 0;
-       unsigned maxbufsize;
+       unsigned maxbufsize = 0;
        int got_maxbufsize = 0;
 
        if( props == NULL || secprops == NULL ) {
@@ -671,8 +908,8 @@ int ldap_pvt_sasl_secprops(
                } else if( !strncasecmp(props[i],
                        "minssf=", sizeof("minssf")) )
                {
-                       if( isdigit( props[i][sizeof("minssf")] ) ) {
-                               got_max_ssf++;
+                       if( isdigit( (unsigned char) props[i][sizeof("minssf")] ) ) {
+                               got_min_ssf++;
                                min_ssf = atoi( &props[i][sizeof("minssf")] );
                        } else {
                                return LDAP_NOT_SUPPORTED;
@@ -681,7 +918,7 @@ int ldap_pvt_sasl_secprops(
                } else if( !strncasecmp(props[i],
                        "maxssf=", sizeof("maxssf")) )
                {
-                       if( isdigit( props[i][sizeof("maxssf")] ) ) {
+                       if( isdigit( (unsigned char) props[i][sizeof("maxssf")] ) ) {
                                got_max_ssf++;
                                max_ssf = atoi( &props[i][sizeof("maxssf")] );
                        } else {
@@ -691,13 +928,20 @@ int ldap_pvt_sasl_secprops(
                } else if( !strncasecmp(props[i],
                        "maxbufsize=", sizeof("maxbufsize")) )
                {
-                       if( isdigit( props[i][sizeof("maxbufsize")] ) ) {
+                       if( isdigit( (unsigned char) props[i][sizeof("maxbufsize")] ) ) {
                                got_maxbufsize++;
                                maxbufsize = atoi( &props[i][sizeof("maxbufsize")] );
                        } else {
                                return LDAP_NOT_SUPPORTED;
                        }
 
+                       if( maxbufsize && (( maxbufsize < SASL_MIN_BUFF_SIZE )
+                               || (maxbufsize > SASL_MAX_BUFF_SIZE )))
+                       {
+                               /* bad maxbufsize */
+                               return LDAP_PARAM_ERROR;
+                       }
+
                } else {
                        return LDAP_NOT_SUPPORTED;
                }
@@ -767,14 +1011,14 @@ ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
                                return -1;
                        }
 
-                       ctx = ld->ld_defconn->lconn_sasl_ctx;
+                       ctx = ld->ld_defconn->lconn_sasl_sockctx;
 
                        if ( ctx == NULL ) {
                                return -1;
                        }
 
                        sc = sasl_getprop( ctx, SASL_SSF,
-                               (void **) &ssf );
+                               (SASL_CONST void **) &ssf );
 
                        if ( sc != SASL_OK ) {
                                return -1;
@@ -820,25 +1064,31 @@ ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
 
        case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
                int sc;
+#if SASL_VERSION_MAJOR < 2
                sasl_external_properties_t extprops;
+#endif
                sasl_conn_t *ctx;
 
                if( ld->ld_defconn == NULL ) {
                        return -1;
                }
 
-               ctx = ld->ld_defconn->lconn_sasl_ctx;
+               ctx = ld->ld_defconn->lconn_sasl_authctx;
 
                if ( ctx == NULL ) {
                        return -1;
                }
 
+#if SASL_VERSION_MAJOR >= 2
+               sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, arg);
+#else
                memset(&extprops, 0L, sizeof(extprops));
 
                extprops.ssf = * (ber_len_t *) arg;
 
                sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
                        (void *) &extprops );
+#endif
 
                if ( sc != SASL_OK ) {
                        return -1;
@@ -870,6 +1120,7 @@ ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
 }
 
 #ifdef LDAP_R_COMPILE
+#define LDAP_DEBUG_R_SASL
 void *ldap_pvt_sasl_mutex_new(void)
 {
        ldap_pvt_thread_mutex_t *mutex;
@@ -880,23 +1131,47 @@ void *ldap_pvt_sasl_mutex_new(void)
        if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
                return mutex;
        }
+#ifndef LDAP_DEBUG_R_SASL
+       assert( 0 );
+#endif /* !LDAP_DEBUG_R_SASL */
        return NULL;
 }
 
 int ldap_pvt_sasl_mutex_lock(void *mutex)
 {
+#ifdef LDAP_DEBUG_R_SASL
+       if ( mutex == NULL ) {
+               return SASL_OK;
+       }
+#else /* !LDAP_DEBUG_R_SASL */
+       assert( mutex );
+#endif /* !LDAP_DEBUG_R_SASL */
        return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
                ? SASL_FAIL : SASL_OK;
 }
 
 int ldap_pvt_sasl_mutex_unlock(void *mutex)
 {
+#ifdef LDAP_DEBUG_R_SASL
+       if ( mutex == NULL ) {
+               return SASL_OK;
+       }
+#else /* !LDAP_DEBUG_R_SASL */
+       assert( mutex );
+#endif /* !LDAP_DEBUG_R_SASL */
        return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
                ? SASL_FAIL : SASL_OK;
 }
 
 void ldap_pvt_sasl_mutex_dispose(void *mutex)
 {
+#ifdef LDAP_DEBUG_R_SASL
+       if ( mutex == NULL ) {
+               return;
+       }
+#else /* !LDAP_DEBUG_R_SASL */
+       assert( mutex );
+#endif /* !LDAP_DEBUG_R_SASL */
        (void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
        LDAP_FREE( mutex );
 }
@@ -915,6 +1190,18 @@ ldap_int_sasl_bind(
        const char              *dn,
        const char              *mechs,
        LDAPControl             **sctrls,
-       LDAPControl             **cctrls )
+       LDAPControl             **cctrls,
+       unsigned                flags,
+       LDAP_SASL_INTERACT_PROC *interact,
+       void * defaults )
 { return LDAP_NOT_SUPPORTED; }
+
+int
+ldap_int_sasl_external(
+       LDAP *ld,
+       LDAPConn *conn,
+       const char * authid,
+       ber_len_t ssf )
+{ return LDAP_SUCCESS; }
+
 #endif /* HAVE_CYRUS_SASL */