/* $OpenLDAP$ */
/*
- * Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
+ * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
* name DistinguishedName, -- who
* authentication CHOICE {
* simple [0] OCTET STRING -- passwd
-#ifdef HAVE_KERBEROS
+#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
* krbv42ldap [1] OCTET STRING
* krbv42dsa [2] OCTET STRING
#endif
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/time.h>
+#include <ac/errno.h>
#include "ldap-int.h"
/*
- * ldap_sasl_bind - bind to the ldap server (and X.500). The dn, mechanism, and
- * credentials of the entry to which to bind are supplied. The message id
- * of the request initiated is provided upon successful (LDAP_SUCCESS) return.
+ * ldap_sasl_bind - bind to the ldap server (and X.500).
+ * The dn (usually NULL), mechanism, and credentials are provided.
+ * The message id of the request initiated is provided upon successful
+ * (LDAP_SUCCESS) return.
*
* Example:
- * ldap_sasl_bind( ld, "cn=manager, o=university of michigan, c=us",
- * "mechanism", "secret", NULL, NULL, &msgid )
+ * ldap_sasl_bind( ld, NULL, "mechanism",
+ * cred, NULL, NULL, &msgid )
*/
int
return ld->ld_errno;
}
- if( mechanism != LDAP_SASL_SIMPLE
- && ld->ld_version < LDAP_VERSION3)
- {
+ if( mechanism == LDAP_SASL_SIMPLE ) {
+ if( dn == NULL && cred != NULL ) {
+ /* use default binddn */
+ dn = ld->ld_defbinddn;
+ }
+
+ } else if( ld->ld_version < LDAP_VERSION3 ) {
ld->ld_errno = LDAP_NOT_SUPPORTED;
return ld->ld_errno;
}
- if ( dn == NULL )
+ if ( dn == NULL ) {
dn = "";
+ }
/* create a message to send */
if ( (ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
return LDAP_SUCCESS;
}
-/*
- * ldap_sasl_bind_s - bind to the ldap server (and X.500) using simple
- * authentication. The dn and password of the entry to which to bind are
- * supplied. LDAP_SUCCESS is returned upon success, the ldap error code
- * otherwise.
- *
- * Example:
- * ldap_sasl_bind_s( ld, "cn=manager, o=university of michigan, c=us",
- * "mechanism", "secret", NULL, NULL, &servercred )
- */
int
ldap_sasl_bind_s(
rc = ldap_parse_sasl_bind_result( ld, result, &scredp, 0 );
}
- if( rc != LDAP_SUCCESS ) {
+ if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
ldap_msgfree( result );
return( rc );
}
rc = ldap_result2error( ld, result, 1 );
- if( rc == LDAP_SUCCESS ) {
+ if ( rc == LDAP_SUCCESS || rc == LDAP_SASL_BIND_IN_PROGRESS ) {
if( servercredp != NULL ) {
*servercredp = scredp;
+ scredp = NULL;
}
+ }
- } else if (scredp != NULL ) {
+ if ( scredp != NULL ) {
ber_bvfree(scredp);
}
/*
- * Parse BindResponse:
- *
- * BindResponse ::= [APPLICATION 1] SEQUENCE {
- * COMPONENTS OF LDAPResult,
- * serverSaslCreds [7] OCTET STRING OPTIONAL }
- *
- * LDAPResult ::= SEQUENCE {
- * resultCode ENUMERATED,
- * matchedDN LDAPDN,
- * errorMessage LDAPString,
- * referral [3] Referral OPTIONAL }
- */
+* Parse BindResponse:
+*
+* BindResponse ::= [APPLICATION 1] SEQUENCE {
+* COMPONENTS OF LDAPResult,
+* serverSaslCreds [7] OCTET STRING OPTIONAL }
+*
+* LDAPResult ::= SEQUENCE {
+* resultCode ENUMERATED,
+* matchedDN LDAPDN,
+* errorMessage LDAPString,
+* referral [3] Referral OPTIONAL }
+*/
int
ldap_parse_sasl_bind_result(
return LDAP_PARAM_ERROR;
}
- if(servercredp != NULL) {
+ if( servercredp != NULL ) {
if( ld->ld_version < LDAP_VERSION2 ) {
return LDAP_NOT_SUPPORTED;
}
*servercredp = NULL;
}
- if( res->lm_msgtype == LDAP_RES_BIND ) {
+ if( res->lm_msgtype != LDAP_RES_BIND ) {
ld->ld_errno = LDAP_PARAM_ERROR;
return ld->ld_errno;
}
- errcode = LDAP_SUCCESS;
scred = NULL;
if ( ld->ld_error ) {
ber = ber_dup( res->lm_ber );
+ if( ber == NULL ) {
+ ld->ld_errno = LDAP_NO_MEMORY;
+ return ld->ld_errno;
+ }
+
if ( ld->ld_version < LDAP_VERSION2 ) {
tag = ber_scanf( ber, "{ia}",
&errcode, &ld->ld_error );
+ if( tag == LBER_ERROR ) {
+ ber_free( ber, 0 );
+ ld->ld_errno = LDAP_DECODING_ERROR;
+ return ld->ld_errno;
+ }
+
} else {
ber_len_t len;
tag = ber_scanf( ber, "{iaa" /*}*/,
&errcode, &ld->ld_matched, &ld->ld_error );
- if( tag != LBER_ERROR ) {
- tag = ber_peek_tag(ber, &len);
+ if( tag == LBER_ERROR ) {
+ ber_free( ber, 0 );
+ ld->ld_errno = LDAP_DECODING_ERROR;
+ return ld->ld_errno;
}
+ tag = ber_peek_tag(ber, &len);
+
if( tag == LDAP_TAG_REFERRAL ) {
/* skip 'em */
- tag = ber_scanf( ber, "x" );
-
- if( tag != LBER_ERROR ) {
- tag = ber_peek_tag(ber, &len);
+ if( ber_scanf( ber, "x" ) == LBER_ERROR ) {
+ ber_free( ber, 0 );
+ ld->ld_errno = LDAP_DECODING_ERROR;
+ return ld->ld_errno;
}
+
+ tag = ber_peek_tag(ber, &len);
}
- /* need to clean out misc items */
if( tag == LDAP_TAG_SASL_RES_CREDS ) {
- tag = ber_scanf( ber, "O", &scred );
+ if( ber_scanf( ber, "O", &scred ) == LBER_ERROR ) {
+ ber_free( ber, 0 );
+ ld->ld_errno = LDAP_DECODING_ERROR;
+ return ld->ld_errno;
+ }
}
}
- if ( tag == LBER_ERROR ) {
- errcode = LDAP_DECODING_ERROR;
- }
-
- if( ber != NULL ) {
- ber_free( ber, 0 );
- }
+ ber_free( ber, 0 );
- /* return */
- if ( errcode == LDAP_SUCCESS && servercredp != NULL ) {
+ if ( servercredp != NULL ) {
*servercredp = scred;
} else if ( scred != NULL ) {
ber_bvfree( scred );
}
+ ld->ld_errno = errcode;
+
if ( freeit ) {
ldap_msgfree( res );
}
- ld->ld_errno = errcode;
return( ld->ld_errno );
}
+
+#ifdef HAVE_CYRUS_SASL
+/*
+* Various Cyrus SASL related stuff.
+*/
+
+#define MAX_BUFF_SIZE 65536
+#define MIN_BUFF_SIZE 4096
+
+static char *
+array2str( char **a )
+{
+ char *s, **v, *p;
+ int len = 0;
+
+ for ( v = a; *v != NULL; v++ ) {
+ len += strlen( *v ) + 1; /* for a space */
+ }
+
+ if ( len == 0 ) {
+ return NULL;
+ }
+
+ s = LDAP_MALLOC ( len ); /* last space holds \0 */
+
+ if ( s == NULL ) {
+ return NULL;
+ }
+
+ p = s;
+ for ( v = a; *v != NULL; v++ ) {
+ int len;
+
+ if ( v != a ) {
+ strncpy( p, " ", 1 );
+ ++p;
+ }
+ len = strlen( *v );
+ strncpy( p, *v, len );
+ p += len;
+ }
+
+ *p = '\0';
+
+ return s;
+}
+
+int ldap_pvt_sasl_init( void )
+{
+ /* XXX not threadsafe */
+ static int sasl_initialized = 0;
+
+ if ( sasl_initialized ) {
+ return 0;
+ }
+#ifndef CSRIMALLOC
+ sasl_set_alloc( ber_memalloc, ber_memcalloc, ber_memrealloc, ber_memfree );
+#endif /* CSRIMALLOC */
+
+ if ( sasl_client_init( NULL ) == SASL_OK ) {
+ sasl_initialized = 1;
+ return 0;
+ }
+
+ return -1;
+}
+
+/*
+ * SASL encryption support for LBER Sockbufs
+ */
+
+struct sb_sasl_data {
+ sasl_conn_t *sasl_context;
+ Sockbuf_Buf sec_buf_in;
+ Sockbuf_Buf buf_in;
+ Sockbuf_Buf buf_out;
+};
+
+static int
+sb_sasl_setup( Sockbuf_IO_Desc *sbiod, void *arg )
+{
+ struct sb_sasl_data *p;
+
+ assert( sbiod != NULL );
+
+ p = LBER_MALLOC( sizeof( *p ) );
+ if ( p == NULL )
+ return -1;
+ p->sasl_context = (sasl_conn_t *)arg;
+ ber_pvt_sb_buf_init( &p->sec_buf_in );
+ 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, MIN_BUFF_SIZE ) < 0 ) {
+ errno = ENOMEM;
+ return -1;
+ }
+
+ sbiod->sbiod_pvt = p;
+
+ return 0;
+}
+
+static int
+sb_sasl_remove( Sockbuf_IO_Desc *sbiod )
+{
+ struct sb_sasl_data *p;
+
+ assert( sbiod != NULL );
+
+ p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
+ 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 );
+ LBER_FREE( p );
+ sbiod->sbiod_pvt = NULL;
+ return 0;
+}
+
+static ber_len_t
+sb_sasl_pkt_length( const char *buf, int debuglevel )
+{
+ ber_len_t size;
+ long tmp;
+
+ assert( buf != NULL );
+
+ tmp = *((long *)buf);
+ size = ntohl( tmp );
+
+ if ( size > MAX_BUFF_SIZE ) {
+ /* somebody is trying to mess me up. */
+ ber_log_printf( LDAP_DEBUG_ANY, 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 )
+{
+ 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 +
+ sec_buf_in->buf_end, len );
+
+ if ( len >= 4 ) {
+ sec_buf_in->buf_end = sb_sasl_pkt_length( sec_buf_in->buf_base,
+ debuglevel);
+ }
+ else {
+ sec_buf_in->buf_end = 0;
+ }
+ sec_buf_in->buf_ptr = len;
+}
+
+static ber_slen_t
+sb_sasl_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
+{
+ struct sb_sasl_data *p;
+ ber_slen_t ret, bufptr;
+
+ assert( sbiod != NULL );
+ assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
+
+ p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
+
+ /* Are there anything left in the buffer? */
+ ret = ber_pvt_sb_copy_out( &p->buf_in, buf, len );
+ bufptr = ret;
+ len -= ret;
+
+ if ( len == 0 )
+ return bufptr;
+
+ ber_pvt_sb_buf_destroy( &p->buf_in );
+
+ /* Read the length of the packet */
+ while ( p->sec_buf_in.buf_ptr < 4 ) {
+ ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base,
+ 4 - p->sec_buf_in.buf_ptr );
+#ifdef EINTR
+ if ( ( ret < 0 ) && ( errno == EINTR ) )
+ continue;
+#endif
+ if ( ret <= 0 )
+ return 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 );
+
+ /* 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 ) {
+ errno = ENOMEM;
+ return -1;
+ }
+ p->sec_buf_in.buf_end = ret;
+
+ /* Did we read the whole encrypted packet? */
+ while ( p->sec_buf_in.buf_ptr < p->sec_buf_in.buf_end ) {
+ /* No, we have got only a part of it */
+ ret = p->sec_buf_in.buf_end - p->sec_buf_in.buf_ptr;
+
+ ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base +
+ p->sec_buf_in.buf_ptr, ret );
+#ifdef EINTR
+ if ( ( ret < 0 ) && ( errno == EINTR ) )
+ continue;
+#endif
+ if ( ret <= 0 )
+ return 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,
+ (unsigned *)&p->buf_in.buf_end );
+ 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 );
+
+ return bufptr;
+}
+
+static ber_slen_t
+sb_sasl_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
+{
+ struct sb_sasl_data *p;
+ int ret;
+
+ assert( sbiod != NULL );
+ assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
+
+ p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
+
+ /* 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 )
+ return ret;
+ }
+
+ /* now encode the next packet. */
+ ber_pvt_sb_buf_destroy( &p->buf_out );
+ ret = sasl_encode( p->sasl_context, buf, len, &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,
+ "sb_sasl_write: failed to encode packet: %s\n",
+ sasl_errstring( ret, NULL, NULL ) );
+ return -1;
+ }
+ p->buf_out.buf_end = p->buf_out.buf_size;
+
+ ret = ber_pvt_sb_do_write( sbiod, &p->buf_out );
+ if ( ret <= 0 )
+ return ret;
+ return len;
+}
+
+static int
+sb_sasl_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
+{
+ struct sb_sasl_data *p;
+
+ p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
+
+ if ( opt == LBER_SB_OPT_DATA_READY ) {
+ if ( p->buf_in.buf_ptr != p->buf_in.buf_end )
+ return 1;
+ }
+
+ return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
+}
+
+Sockbuf_IO ldap_pvt_sockbuf_io_sasl =
+{
+ sb_sasl_setup, /* sbi_setup */
+ sb_sasl_remove, /* sbi_remove */
+ sb_sasl_ctrl, /* sbi_ctrl */
+ sb_sasl_read, /* sbi_read */
+ sb_sasl_write, /* sbi_write */
+ NULL /* sbi_close */
+};
+
+int ldap_pvt_sasl_install( Sockbuf *sb, void *ctx_arg )
+{
+ /* 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 ) )
+ ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_sasl,
+ LBER_SBIOD_LEVEL_APPLICATION, ctx_arg );
+
+ return LDAP_SUCCESS;
+}
+
+static int
+sasl_err2ldap( int saslerr )
+{
+ int rc;
+
+ switch (saslerr) {
+ case SASL_CONTINUE:
+ rc = LDAP_MORE_RESULTS_TO_RETURN;
+ break;
+ case SASL_OK:
+ rc = LDAP_SUCCESS;
+ break;
+ case SASL_FAIL:
+ rc = LDAP_LOCAL_ERROR;
+ break;
+ case SASL_NOMEM:
+ rc = LDAP_NO_MEMORY;
+ break;
+ case SASL_NOMECH:
+ rc = LDAP_AUTH_UNKNOWN;
+ break;
+ case SASL_BADAUTH:
+ rc = LDAP_AUTH_UNKNOWN;
+ break;
+ case SASL_NOAUTHZ:
+ rc = LDAP_PARAM_ERROR;
+ break;
+ case SASL_TOOWEAK:
+ case SASL_ENCRYPT:
+ rc = LDAP_AUTH_UNKNOWN;
+ break;
+ default:
+ rc = LDAP_LOCAL_ERROR;
+ break;
+ }
+
+ assert( rc == LDAP_SUCCESS || LDAP_API_ERROR( rc ) );
+ return rc;
+}
+
+int
+ldap_pvt_sasl_getmechs ( LDAP *ld, char **pmechlist )
+{
+ /* we need to query the server for supported mechs anyway */
+ LDAPMessage *res, *e;
+ char *attrs[] = { "supportedSASLMechanisms", NULL };
+ char **values, *mechlist;
+ int rc;
+
+ Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_getmech\n", 0, 0, 0 );
+
+ rc = ldap_search_s( ld, NULL, LDAP_SCOPE_BASE,
+ NULL, attrs, 0, &res );
+
+ if ( rc != LDAP_SUCCESS ) {
+ return ld->ld_errno;
+ }
+
+ e = ldap_first_entry( ld, res );
+ if ( e == NULL ) {
+ if ( ld->ld_errno == LDAP_SUCCESS ) {
+ ld->ld_errno = LDAP_UNAVAILABLE;
+ }
+ return ld->ld_errno;
+ }
+
+ values = ldap_get_values( ld, e, "supportedSASLMechanisms" );
+ if ( values == NULL ) {
+ ld->ld_errno = LDAP_NO_SUCH_ATTRIBUTE;
+ ldap_msgfree( res );
+ return ld->ld_errno;
+ }
+
+ mechlist = array2str( values );
+ if ( mechlist == NULL ) {
+ ld->ld_errno = LDAP_NO_MEMORY;
+ LDAP_VFREE( values );
+ ldap_msgfree( res );
+ return ld->ld_errno;
+ }
+
+ LDAP_VFREE( values );
+ ldap_msgfree( res );
+
+ *pmechlist = mechlist;
+
+ return LDAP_SUCCESS;
+}
+
+int
+ldap_pvt_sasl_bind(
+ LDAP *ld,
+ LDAP_CONST char *dn,
+ LDAP_CONST char *mechs,
+ LDAP_CONST sasl_callback_t *callbacks,
+ LDAPControl **sctrls,
+ LDAPControl **cctrls )
+{
+ const char *mech;
+ int saslrc, rc;
+ sasl_ssf_t *ssf = NULL;
+ unsigned credlen;
+ struct berval ccred, *scred;
+ char *host;
+ sasl_interact_t *client_interact = NULL;
+ struct sockaddr_in sin;
+ socklen_t len;
+ sasl_security_properties_t secprops;
+ ber_socket_t sd;
+
+ Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_bind\n", 0, 0, 0 );
+
+ /* do a quick !LDAPv3 check... ldap_sasl_bind will do the rest. */
+ if (ld->ld_version < LDAP_VERSION3) {
+ ld->ld_errno = LDAP_NOT_SUPPORTED;
+ return ld->ld_errno;
+ }
+
+ ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
+
+ if ( sd == AC_SOCKET_INVALID ) {
+ /* not connected yet */
+ int rc = ldap_open_defconn( ld );
+
+ if( rc < 0 ) return ld->ld_errno;
+ ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
+ }
+
+ /* XXX this doesn't work with PF_LOCAL hosts */
+ host = ldap_host_connected_to( ld->ld_sb );
+
+ if ( host == NULL ) {
+ ld->ld_errno = LDAP_UNAVAILABLE;
+ return ld->ld_errno;
+ }
+
+ if ( ld->ld_sasl_context != NULL ) {
+ sasl_dispose( &ld->ld_sasl_context );
+ }
+
+ saslrc = sasl_client_new( "ldap", host, callbacks, SASL_SECURITY_LAYER,
+ &ld->ld_sasl_context );
+
+ LDAP_FREE( host );
+
+ if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
+ ld->ld_errno = sasl_err2ldap( saslrc );
+ sasl_dispose( &ld->ld_sasl_context );
+ return ld->ld_errno;
+ }
+
+ len = sizeof( sin );
+ if ( getpeername( sd, (struct sockaddr *)&sin, &len ) == -1 ) {
+ Debug( LDAP_DEBUG_ANY, "SASL: can't query remote IP.\n",
+ 0, 0, 0 );
+ ld->ld_errno = LDAP_OPERATIONS_ERROR;
+ return ld->ld_errno;
+ }
+ sasl_setprop( ld->ld_sasl_context, SASL_IP_REMOTE, &sin );
+
+ len = sizeof( sin );
+ if ( getsockname( sd, (struct sockaddr *)&sin, &len ) == -1 ) {
+ Debug( LDAP_DEBUG_ANY, "SASL: can't query local IP.\n",
+ 0, 0, 0 );
+ ld->ld_errno = LDAP_OPERATIONS_ERROR;
+ return ld->ld_errno;
+ }
+ sasl_setprop( ld->ld_sasl_context, SASL_IP_LOCAL, &sin );
+
+ memset( &secprops, '\0', sizeof( secprops ) );
+ secprops.min_ssf = ld->ld_options.ldo_sasl_minssf;
+ secprops.max_ssf = ld->ld_options.ldo_sasl_maxssf;
+ secprops.security_flags = SASL_SECURITY_LAYER;
+ secprops.maxbufsize = 65536;
+ sasl_setprop( ld->ld_sasl_context, SASL_SEC_PROPS, &secprops );
+
+ ccred.bv_val = NULL;
+ ccred.bv_len = 0;
+
+ saslrc = sasl_client_start( ld->ld_sasl_context,
+ mechs,
+ NULL,
+ &client_interact,
+ &ccred.bv_val,
+ &credlen,
+ &mech );
+
+ ccred.bv_len = credlen;
+
+ if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
+ ld->ld_errno = sasl_err2ldap( saslrc );
+ sasl_dispose( &ld->ld_sasl_context );
+ return ld->ld_errno;
+ }
+
+ scred = NULL;
+
+ do {
+ unsigned credlen;
+ sasl_interact_t *client_interact = NULL;
+
+ rc = ldap_sasl_bind_s( ld, dn, mech, &ccred, sctrls, cctrls, &scred );
+ if ( rc == LDAP_SUCCESS ) {
+ break;
+ } else if ( rc != LDAP_SASL_BIND_IN_PROGRESS ) {
+ if ( ccred.bv_val != NULL ) {
+ LDAP_FREE( ccred.bv_val );
+ }
+ sasl_dispose( &ld->ld_sasl_context );
+ return ld->ld_errno;
+ }
+
+ if ( ccred.bv_val != NULL ) {
+ LDAP_FREE( ccred.bv_val );
+ ccred.bv_val = NULL;
+ }
+
+ saslrc = sasl_client_step( ld->ld_sasl_context,
+ (scred == NULL) ? NULL : scred->bv_val,
+ (scred == NULL) ? 0 : scred->bv_len,
+ &client_interact,
+ &ccred.bv_val,
+ &credlen );
+
+ ccred.bv_len = credlen;
+ ber_bvfree( scred );
+
+ if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
+ ld->ld_errno = sasl_err2ldap( saslrc );
+ sasl_dispose( &ld->ld_sasl_context );
+ return ld->ld_errno;
+ }
+ } while ( rc == LDAP_SASL_BIND_IN_PROGRESS );
+
+ assert ( rc == LDAP_SUCCESS );
+
+ if ( sasl_getprop( ld->ld_sasl_context, SASL_SSF, (void **)&ssf )
+ == SASL_OK && ssf && *ssf ) {
+ ldap_pvt_sasl_install( ld->ld_sb, ld->ld_sasl_context );
+ }
+
+ return rc;
+}
+
+/* based on sample/sample-client.c */
+static int
+ldap_pvt_sasl_getsecret(sasl_conn_t *conn,
+ void *context, int id, sasl_secret_t **psecret)
+{
+ struct berval *passphrase = (struct berval *)context;
+ size_t len;
+
+ if ( conn == NULL || psecret == NULL || id != SASL_CB_PASS ) {
+ return SASL_BADPARAM;
+ }
+
+ len = (passphrase != NULL) ? (size_t)passphrase->bv_len: 0;
+
+ *psecret = (sasl_secret_t *) LDAP_MALLOC( sizeof( sasl_secret_t ) + len );
+ if ( *psecret == NULL ) {
+ return SASL_NOMEM;
+ }
+
+ (*psecret)->len = passphrase->bv_len;
+
+ if ( passphrase != NULL ) {
+ memcpy((*psecret)->data, passphrase->bv_val, len);
+ }
+
+ return SASL_OK;
+}
+
+static int
+ldap_pvt_sasl_getsimple(void *context, int id, const char **result, int *len)
+{
+ const char *value = (const char *)context;
+
+ if ( result == NULL ) {
+ return SASL_BADPARAM;
+ }
+
+ switch ( id ) {
+ case SASL_CB_USER:
+ case SASL_CB_AUTHNAME:
+ *result = value;
+ if ( len )
+ *len = value ? strlen( value ) : 0;
+ break;
+ case SASL_CB_LANGUAGE:
+ *result = NULL;
+ if ( len )
+ *len = 0;
+ break;
+ default:
+ return SASL_BADPARAM;
+ }
+
+ return SASL_OK;
+}
+
+int
+ldap_pvt_sasl_get_option( LDAP *ld, int option, void *arg )
+{
+ sasl_ssf_t *ssf;
+
+ if ( ld == NULL )
+ return -1;
+
+ switch ( option ) {
+ case LDAP_OPT_X_SASL_MINSSF:
+ *(int *)arg = ld->ld_options.ldo_sasl_minssf;
+ break;
+ case LDAP_OPT_X_SASL_MAXSSF:
+ *(int *)arg = ld->ld_options.ldo_sasl_maxssf;
+ break;
+ case LDAP_OPT_X_SASL_ACTSSF:
+ if ( ld->ld_sasl_context == NULL ) {
+ *(int *)arg = -1;
+ break;
+ }
+ if ( sasl_getprop( ld->ld_sasl_context, SASL_SSF,
+ (void **) &ssf ) != SASL_OK )
+ {
+ return -1;
+ }
+ *(int *)arg = *ssf;
+ break;
+ default:
+ return -1;
+ }
+ return 0;
+}
+
+int
+ldap_pvt_sasl_set_option( LDAP *ld, int option, void *arg )
+{
+ if ( ld == NULL )
+ return -1;
+
+ switch ( option ) {
+ case LDAP_OPT_X_SASL_MINSSF:
+ ld->ld_options.ldo_sasl_minssf = *(int *)arg;
+ break;
+ case LDAP_OPT_X_SASL_MAXSSF:
+ ld->ld_options.ldo_sasl_maxssf = *(int *)arg;
+ break;
+ case LDAP_OPT_X_SASL_ACTSSF:
+ /* This option is read-only */
+ default:
+ return -1;
+ }
+ return 0;
+}
+
+/*
+ * ldap_negotiated_sasl_bind_s - bind to the ldap server (and X.500)
+ * using SASL authentication.
+ *
+ * This routine attempts to authenticate the user referred by the
+ * authentication id using the provided password. An optional
+ * authorization identity may be provided. An DN is generally not
+ * provided [see AuthMethod].
+ *
+ * If the mechanism negotiated does not require a password, the
+ * passwd field is ignored. [A callback mechanism should really
+ * be used].
+ *
+ * LDAP_SUCCESS is returned upon success, the ldap error code
+ * otherwise.
+ *
+ * Examples:
+ * ldap_negotiated_sasl_bind_s( ld, NULL,
+ * NULL, NULL, NULL,
+ * NULL, NULL, NULL, NULL );
+ *
+ * ldap_negotiated_sasl_bind_s( ld, NULL,
+ * "user@OPENLDAP.ORG", NULL, NULL,
+ * "GSSAPI", NULL, NULL, NULL );
+ *
+ * ldap_negotiated_sasl_bind_s( ld, NULL,
+ * "manager", "dn:cn=user,dc=openldap,dc=org", NULL,
+ * "DIGEST-MD5", NULL, NULL, NULL );
+ *
+ * ldap_negotiated_sasl_bind_s( ld, NULL,
+ * "root@OPENLDAP.ORG", "u:user@OPENLDAP.ORG", NULL,
+ * "GSSAPI", NULL, NULL, NULL );
+ *
+ * ldap_negotiated_sasl_bind_s( ld, NULL,
+ * "manager", "dn:cn=user,dc=openldap,dc=org", NULL,
+ * "DIGEST-MD5", NULL, NULL, NULL );
+ */
+int
+ldap_negotiated_sasl_bind_s(
+ LDAP *ld,
+ LDAP_CONST char *dn, /* usually NULL */
+ LDAP_CONST char *authenticationId,
+ LDAP_CONST char *authorizationId, /* commonly NULL */
+ LDAP_CONST char *saslMechanism,
+ struct berval *passPhrase,
+ LDAPControl **serverControls,
+ LDAPControl **clientControls)
+{
+ int n;
+ sasl_callback_t callbacks[4];
+ int rc;
+
+ Debug( LDAP_DEBUG_TRACE, "ldap_negotiated_sasl_bind_s\n", 0, 0, 0 );
+
+ if( saslMechanism == NULL || *saslMechanism == '\0' ) {
+ char *mechs;
+ rc = ldap_pvt_sasl_getmechs( ld, &mechs );
+
+ if( rc != LDAP_SUCCESS ) {
+ return rc;
+ }
+
+ saslMechanism = mechs;
+ }
+
+ /* SASL Authentication Identity */
+ callbacks[n=0].id = SASL_CB_AUTHNAME;
+ callbacks[n].proc = ldap_pvt_sasl_getsimple;
+ callbacks[n].context = (void *)authenticationId;
+
+ /* SASL Authorization Identity (userid) */
+ if( authorizationId != NULL ) {
+ callbacks[++n].id = SASL_CB_USER;
+ callbacks[n].proc = ldap_pvt_sasl_getsimple;
+ callbacks[n].context = (void *)authorizationId;
+ }
+
+ callbacks[++n].id = SASL_CB_PASS;
+ callbacks[n].proc = ldap_pvt_sasl_getsecret;
+ callbacks[n].context = (void *)passPhrase;
+
+ callbacks[++n].id = SASL_CB_LIST_END;
+ callbacks[n].proc = NULL;
+ callbacks[n].context = NULL;
+
+ assert( n * sizeof(sasl_callback_t) < sizeof(callbacks) );
+
+ rc = ldap_pvt_sasl_bind(ld, dn, saslMechanism, callbacks,
+ serverControls, clientControls);
+
+ return rc;
+}
+#endif /* HAVE_CYRUS_SASL */
projects / openldap / blobdiff