--- /dev/null
+/* gnutls.c - Handle tls/ssl using GNUTLS. */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2007 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+/* ACKNOWLEDGEMENTS:
+ */
+
+#include "portable.h"
+
+#if 1 /* HAVE_GNUTLS */
+
+#include "ldap_config.h"
+
+#include <stdio.h>
+
+#include <ac/stdlib.h>
+#include <ac/errno.h>
+#include <ac/socket.h>
+#include <ac/string.h>
+#include <ac/ctype.h>
+#include <ac/time.h>
+#include <ac/unistd.h>
+#include <ac/param.h>
+#include <ac/dirent.h>
+
+#include "ldap-int.h"
+#include "ldap_schema.h"
+
+#include <gnutls/gnutls.h>
+#include <gnutls/x509.h>
+#include <gcrypt.h>
+
+#define DH_BITS (1024)
+
+#ifdef LDAP_R_COMPILE
+# include <ldap_pvt_thread.h>
+
+static int
+ldap_pvt_gcry_mutex_init( void **priv )
+{
+ int err = 0;
+ ldap_pvt_thread_mutex_t *lock = LDAP_MALLOC( sizeof( ldap_pvt_thread_mutex_t ));
+
+ if ( !lock )
+ err = ENOMEM;
+ if ( !err ) {
+ err = ldap_pvt_thread_mutex_init( lock );
+ if ( err )
+ LDAP_FREE( lock );
+ else
+ *priv = lock;
+ }
+ return err;
+}
+static int
+ldap_pvt_gcry_mutex_destroy( void **lock )
+{
+ int err = ldap_pvt_thread_mutex_destroy( *lock );
+ LDAP_FREE( *lock );
+ return err;
+}
+static int
+ldap_pvt_gcry_mutex_lock( void **lock )
+{
+ return ldap_pvt_thread_mutex_lock( *lock );
+}
+static int
+ldap_pvt_gcry_mutex_unlock( void **lock )
+{
+ return ldap_pvt_thread_mutex_unlock( *lock );
+}
+
+static struct gcry_thread_cbs ldap_generic_thread_cbs = {
+ GCRY_THREAD_OPTION_USER,
+ NULL,
+ ldap_pvt_gcry_mutex_init,
+ ldap_pvt_gcry_mutex_destroy,
+ ldap_pvt_gcry_mutex_lock,
+ ldap_pvt_gcry_mutex_unlock,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
+};
+#endif
+
+/* sorta replacing SSL_CTX */
+typedef struct ldap_pvt_tls_ctx {
+ struct ldapoptions *lo;
+ int *cipher_list;
+ gnutls_certificate_credentials_t cred;
+ gnutls_dh_params_t dh_params;
+ unsigned long verify_depth;
+ int refcount;
+#ifdef LDAP_R_COMPILE
+ ldap_pvt_thread_mutex_t ref_mutex;
+#endif
+} ldap_pvt_tls_ctx_t;
+
+/* sorta replacing SSL */
+typedef struct ldap_pvt_gnutls_session {
+ gnutls_session_t session;
+ struct berval peer_der_dn;
+} ldap_pvt_gnutls_session_t;
+
+#define HAS_TLS( sb ) ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO, \
+ (void *)&sb_tls_sbio )
+
+/* RFC2459 minimum required set of supported attribute types
+ */
+typedef struct oid_name {
+ struct berval oid;
+ struct berval name;
+} oid_name;
+
+#define CN_OID oids[0].oid.bv_val
+
+static oid_name oids[] = {
+ { BER_BVC("2.5.4.3"), BER_BVC("cn") },
+ { BER_BVC("2.5.4.4"), BER_BVC("sn") },
+ { BER_BVC("2.5.4.6"), BER_BVC("c") },
+ { BER_BVC("2.5.4.7"), BER_BVC("l") },
+ { BER_BVC("2.5.4.8"), BER_BVC("st") },
+ { BER_BVC("2.5.4.10"), BER_BVC("o") },
+ { BER_BVC("2.5.4.11"), BER_BVC("ou") },
+ { BER_BVC("2.5.4.12"), BER_BVC("title") },
+ { BER_BVC("2.5.4.41"), BER_BVC("name") },
+ { BER_BVC("2.5.4.42"), BER_BVC("givenName") },
+ { BER_BVC("2.5.4.43"), BER_BVC("initials") },
+ { BER_BVC("2.5.4.44"), BER_BVC("generationQualifier") },
+ { BER_BVC("2.5.4.46"), BER_BVC("dnQualifier") },
+ { BER_BVC("1.2.840.113549.1.9.1"), BER_BVC("email") },
+ { BER_BVC("0.9.2342.19200300.100.1.25"), BER_BVC("dc") },
+ { BER_BVNULL, BER_BVNULL }
+};
+
+ldap_pvt_tls_ctx_t *
+ldap_pvt_tls_ctx_new ( struct ldapoptions *lo )
+{
+ ldap_pvt_tls_ctx_t *ctx;
+
+ ctx = ber_memcalloc ( 1, sizeof (*ctx) );
+ if ( ctx ) {
+ ctx->lo = lo;
+ if ( gnutls_certificate_allocate_credentials( &ctx->cred ) < 0 ) {
+ ber_memfree( ctx );
+ return NULL;
+ }
+ ctx->refcount = 1;
+#ifdef LDAP_R_COMPILE
+ ldap_pvt_thread_mutex_init( &ctx->ref_mutex );
+#endif
+ }
+ return ctx;
+}
+
+void
+ldap_pvt_tls_ctx_free ( void *c )
+{
+ int refcount;
+ ldap_pvt_tls_ctx_t *ctx = c;
+
+#ifdef LDAP_R_COMPILE
+ ldap_pvt_thread_mutex_lock( &ctx->ref_mutex );
+#endif
+ refcount = --ctx->refcount;
+#ifdef LDAP_R_COMPILE
+ ldap_pvt_thread_mutex_unlock( &ctx->ref_mutex );
+#endif
+ if ( refcount )
+ return;
+ gnutls_certificate_free_credentials( ctx->cred );
+ ber_memfree ( ctx );
+}
+
+static void
+ldap_pvt_tls_ctx_ref( ldap_pvt_tls_ctx_t * ctx )
+{
+#ifdef LDAP_R_COMPILE
+ ldap_pvt_thread_mutex_lock( &ctx->ref_mutex );
+#endif
+ ctx->refcount++;
+#ifdef LDAP_R_COMPILE
+ ldap_pvt_thread_mutex_unlock( &ctx->ref_mutex );
+#endif
+}
+
+ldap_pvt_gnutls_session_t *
+ldap_pvt_gnutls_session_new ( ldap_pvt_tls_ctx_t * ctx, int is_server )
+{
+ ldap_pvt_gnutls_session_t *session;
+
+ session = ber_memcalloc ( 1, sizeof (*session) );
+ if ( !session )
+ return NULL;
+
+ gnutls_init( &session->session, is_server ? GNUTLS_SERVER : GNUTLS_CLIENT );
+ gnutls_set_default_priority( session->session );
+ if ( ctx->cred )
+ gnutls_credentials_set( session->session, GNUTLS_CRD_CERTIFICATE, ctx->cred );
+
+ if ( is_server ) {
+ int flag = 0;
+ if ( ctx->lo->ldo_tls_require_cert ) {
+ flag = GNUTLS_CERT_REQUEST;
+ if ( ctx->lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_DEMAND ||
+ ctx->lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_HARD )
+ flag = GNUTLS_CERT_REQUIRE;
+ gnutls_certificate_server_set_request( session->session, flag );
+ }
+ }
+ return session;
+}
+
+void
+ldap_pvt_gnutls_session_free ( ldap_pvt_gnutls_session_t * session )
+{
+ ber_memfree ( session );
+}
+
+#ifdef LDAP_R_COMPILE
+static void
+tls_init_threads( void )
+{
+ gcry_control (GCRYCTL_SET_THREAD_CBS, &ldap_generic_thread_cbs);
+}
+#endif
+
+void
+ldap_int_tls_destroy( struct ldapoptions *lo )
+{
+ if ( lo->ldo_tls_ctx ) {
+ ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx );
+ lo->ldo_tls_ctx = NULL;
+ }
+
+ if ( lo->ldo_tls_certfile ) {
+ LDAP_FREE( lo->ldo_tls_certfile );
+ lo->ldo_tls_certfile = NULL;
+ }
+ if ( lo->ldo_tls_keyfile ) {
+ LDAP_FREE( lo->ldo_tls_keyfile );
+ lo->ldo_tls_keyfile = NULL;
+ }
+ if ( lo->ldo_tls_dhfile ) {
+ LDAP_FREE( lo->ldo_tls_dhfile );
+ lo->ldo_tls_dhfile = NULL;
+ }
+ if ( lo->ldo_tls_cacertfile ) {
+ LDAP_FREE( lo->ldo_tls_cacertfile );
+ lo->ldo_tls_cacertfile = NULL;
+ }
+ if ( lo->ldo_tls_cacertdir ) {
+ LDAP_FREE( lo->ldo_tls_cacertdir );
+ lo->ldo_tls_cacertdir = NULL;
+ }
+ if ( lo->ldo_tls_ciphersuite ) {
+ LDAP_FREE( lo->ldo_tls_ciphersuite );
+ lo->ldo_tls_ciphersuite = NULL;
+ }
+}
+
+/*
+ * Tear down the TLS subsystem. Should only be called once.
+ */
+void
+ldap_pvt_tls_destroy( void )
+{
+ struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT();
+
+ ldap_int_tls_destroy( lo );
+
+ gnutls_global_deinit();
+}
+
+/*
+ * Initialize TLS subsystem. Should be called only once.
+ */
+int
+ldap_pvt_tls_init( void )
+{
+ static int tls_initialized = 0;
+
+ if ( tls_initialized++ ) return 0;
+
+#ifdef LDAP_R_COMPILE
+ tls_init_threads();
+#endif
+ gnutls_global_init ();
+ return 0;
+}
+
+/*
+ * initialize a new TLS context
+ */
+static int
+ldap_int_tls_init_ctx( struct ldapoptions *lo, int is_server )
+{
+ int i, rc = 0;
+ char *ciphersuite = lo->ldo_tls_ciphersuite;
+ char *cacertfile = lo->ldo_tls_cacertfile;
+ char *cacertdir = lo->ldo_tls_cacertdir;
+ char *certfile = lo->ldo_tls_certfile;
+ char *keyfile = lo->ldo_tls_keyfile;
+ char *dhfile = lo->ldo_tls_dhfile;
+
+ if ( lo->ldo_tls_ctx )
+ return 0;
+
+ ldap_pvt_tls_init();
+
+ if ( is_server && !certfile && !keyfile && !cacertfile && !cacertdir ) {
+ /* minimum configuration not provided */
+ return LDAP_NOT_SUPPORTED;
+ }
+
+#ifdef HAVE_EBCDIC
+ /* This ASCII/EBCDIC handling is a real pain! */
+ if ( ciphersuite ) {
+ ciphersuite = LDAP_STRDUP( ciphersuite );
+ __atoe( ciphersuite );
+ }
+ if ( cacertfile ) {
+ cacertfile = LDAP_STRDUP( cacertfile );
+ __atoe( cacertfile );
+ }
+ if ( cacertdir ) {
+ cacertdir = LDAP_STRDUP( cacertdir );
+ __atoe( cacertdir );
+ }
+ if ( certfile ) {
+ certfile = LDAP_STRDUP( certfile );
+ __atoe( certfile );
+ }
+ if ( keyfile ) {
+ keyfile = LDAP_STRDUP( keyfile );
+ __atoe( keyfile );
+ }
+ if ( dhfile ) {
+ dhfile = LDAP_STRDUP( dhfile );
+ __atoe( dhfile );
+ }
+#endif
+ lo->ldo_tls_ctx = ldap_pvt_tls_ctx_new ( lo );
+ if ( lo->ldo_tls_ctx == NULL ) {
+ Debug( LDAP_DEBUG_ANY,
+ "TLS: could not allocate default ctx.\n",
+ 0,0,0);
+ rc = -1;
+ goto error_exit;
+ }
+
+ /* fixme convert ciphersuite spec formats? */
+/* if ( lo->ldo_tls_ciphersuite && hm ) { */
+/* Debug( LDAP_DEBUG_ANY, */
+/* "TLS: could not set cipher list %s.\n", */
+/* lo->ldo_tls_ciphersuite, 0, 0 ); */
+/* tls_report_error(); */
+/* rc = -1; */
+/* goto error_exit; */
+/* } */
+
+ if (lo->ldo_tls_cacertdir != NULL) {
+ Debug( LDAP_DEBUG_ANY,
+ "TLS: warning: cacertdir not implemented for gnutls\n",
+ NULL, NULL, NULL );
+ }
+
+ if (lo->ldo_tls_cacertfile != NULL) {
+ rc = gnutls_certificate_set_x509_trust_file(
+ ((ldap_pvt_tls_ctx_t*) lo->ldo_tls_ctx)->cred,
+ lo->ldo_tls_cacertfile,
+ GNUTLS_X509_FMT_PEM );
+ if ( rc < 0 ) goto error_exit;
+ }
+
+ if ( lo->ldo_tls_certfile && lo->ldo_tls_keyfile ) {
+ rc = gnutls_certificate_set_x509_key_file(
+ ((ldap_pvt_tls_ctx_t*) lo->ldo_tls_ctx)->cred,
+ lo->ldo_tls_certfile,
+ lo->ldo_tls_keyfile,
+ GNUTLS_X509_FMT_PEM );
+ if ( rc ) goto error_exit;
+ } else if ( lo->ldo_tls_certfile || lo->ldo_tls_keyfile ) {
+ Debug( LDAP_DEBUG_ANY,
+ "TLS: only one of certfile and keyfile specified\n",
+ NULL, NULL, NULL );
+ rc = 1;
+ goto error_exit;
+ }
+
+ if ( lo->ldo_tls_dhfile ) {
+ Debug( LDAP_DEBUG_ANY,
+ "TLS: warning: ignoring dhfile\n",
+ NULL, NULL, NULL );
+ }
+
+ gnutls_dh_params_init (&((ldap_pvt_tls_ctx_t*)
+ lo->ldo_tls_ctx)->dh_params);
+ gnutls_dh_params_generate2 (((ldap_pvt_tls_ctx_t*)
+ lo->ldo_tls_ctx)->dh_params,
+ DH_BITS);
+
+ /* fixme verify options */
+/* i = SSL_VERIFY_NONE; */
+/* if ( lo->ldo_tls_require_cert ) { */
+/* i = SSL_VERIFY_PEER; */
+/* if ( lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_DEMAND || */
+/* lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_HARD ) { */
+/* i |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT; */
+/* } */
+/* } */
+
+/* SSL_CTX_set_verify( lo->ldo_tls_ctx, i, */
+/* lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_ALLOW ? */
+/* tls_verify_ok : tls_verify_cb ); */
+/* SSL_CTX_set_tmp_rsa_callback( lo->ldo_tls_ctx, tls_tmp_rsa_cb ); */
+/* if ( lo->ldo_tls_dhfile ) { */
+/* SSL_CTX_set_tmp_dh_callback( lo->ldo_tls_ctx, tls_tmp_dh_cb ); */
+/* } */
+
+/* fixme crl check */
+
+error_exit:
+#ifdef HAVE_EBCDIC
+ LDAP_FREE( ciphersuite );
+ LDAP_FREE( cacertfile );
+ LDAP_FREE( cacertdir );
+ LDAP_FREE( certfile );
+ LDAP_FREE( keyfile );
+ LDAP_FREE( dhfile );
+#endif
+ return rc;
+}
+
+/*
+ * initialize the default context
+ */
+int
+ldap_pvt_tls_init_def_ctx( int is_server )
+{
+ return ldap_int_tls_init_ctx( LDAP_INT_GLOBAL_OPT(), is_server );
+}
+
+static ldap_pvt_gnutls_session_t *
+alloc_handle( void *ctx_arg, int is_server )
+{
+ ldap_pvt_tls_ctx_t *ctx;
+ ldap_pvt_gnutls_session_t *session;
+
+ if ( ctx_arg ) {
+ ctx = (ldap_pvt_tls_ctx_t *) ctx_arg;
+ } else {
+ struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT();
+ if ( ldap_pvt_tls_init_def_ctx( is_server ) < 0 ) return NULL;
+ ctx = lo->ldo_tls_ctx;
+ }
+
+ session = ldap_pvt_gnutls_session_new( ctx, is_server );
+ if ( session == NULL ) {
+ Debug( LDAP_DEBUG_ANY,"TLS: can't create ssl handle.\n",0,0,0);
+ return NULL;
+ }
+ return session;
+}
+
+static int
+update_flags( Sockbuf *sb,
+ ldap_pvt_gnutls_session_t * session,
+ int rc )
+{
+ sb->sb_trans_needs_read = 0;
+ sb->sb_trans_needs_write = 0;
+
+ if ( rc != GNUTLS_E_INTERRUPTED && rc != GNUTLS_E_AGAIN )
+ return 0;
+
+ switch (gnutls_record_get_direction (session->session)) {
+ case 0:
+ sb->sb_trans_needs_read = 1;
+ return 1;
+ case 1:
+ sb->sb_trans_needs_write = 1;
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * TLS support for LBER Sockbufs
+ */
+
+struct tls_data {
+ ldap_pvt_gnutls_session_t *session;
+ Sockbuf_IO_Desc *sbiod;
+};
+
+static ssize_t
+sb_gtls_recv( gnutls_transport_ptr_t ptr, void *buf, size_t len )
+{
+ struct tls_data *p;
+
+ if ( buf == NULL || len <= 0 ) return 0;
+
+ p = (struct tls_data *)ptr;
+
+ if ( p == NULL || p->sbiod == NULL ) {
+ return 0;
+ }
+
+ return LBER_SBIOD_READ_NEXT( p->sbiod, buf, len );
+}
+
+static ssize_t
+sb_gtls_send( gnutls_transport_ptr_t ptr, const void *buf, size_t len )
+{
+ struct tls_data *p;
+
+ if ( buf == NULL || len <= 0 ) return 0;
+
+ p = (struct tls_data *)ptr;
+
+ if ( p == NULL || p->sbiod == NULL ) {
+ return 0;
+ }
+
+ return LBER_SBIOD_WRITE_NEXT( p->sbiod, (char *)buf, len );
+}
+
+static int
+sb_tls_setup( Sockbuf_IO_Desc *sbiod, void *arg )
+{
+ struct tls_data *p;
+ ldap_pvt_gnutls_session_t *session = arg;
+
+ assert( sbiod != NULL );
+
+ p = LBER_MALLOC( sizeof( *p ) );
+ if ( p == NULL ) {
+ return -1;
+ }
+
+ gnutls_transport_set_ptr( session->session, (gnutls_transport_ptr)p );
+ gnutls_transport_set_pull_function( session->session, sb_gtls_recv );
+ gnutls_transport_set_push_function( session->session, sb_gtls_send );
+ p->session = arg;
+ p->sbiod = sbiod;
+ sbiod->sbiod_pvt = p;
+ return 0;
+}
+
+static int
+sb_tls_remove( Sockbuf_IO_Desc *sbiod )
+{
+ struct tls_data *p;
+
+ assert( sbiod != NULL );
+ assert( sbiod->sbiod_pvt != NULL );
+
+ p = (struct tls_data *)sbiod->sbiod_pvt;
+ gnutls_deinit ( p->session->session );
+ LBER_FREE( p->session );
+ LBER_FREE( sbiod->sbiod_pvt );
+ sbiod->sbiod_pvt = NULL;
+ return 0;
+}
+
+static int
+sb_tls_close( Sockbuf_IO_Desc *sbiod )
+{
+ struct tls_data *p;
+
+ assert( sbiod != NULL );
+ assert( sbiod->sbiod_pvt != NULL );
+
+ p = (struct tls_data *)sbiod->sbiod_pvt;
+ gnutls_bye ( p->session->session, GNUTLS_SHUT_RDWR );
+ return 0;
+}
+
+static int
+sb_tls_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
+{
+ struct tls_data *p;
+
+ assert( sbiod != NULL );
+ assert( sbiod->sbiod_pvt != NULL );
+
+ p = (struct tls_data *)sbiod->sbiod_pvt;
+
+ if ( opt == LBER_SB_OPT_GET_SSL ) {
+ *((ldap_pvt_gnutls_session_t **)arg) = p->session;
+ return 1;
+
+ } else if ( opt == LBER_SB_OPT_DATA_READY ) {
+ if( gnutls_record_check_pending( p->session->session ) > 0 ) {
+ return 1;
+ }
+ }
+
+ return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
+}
+
+static ber_slen_t
+sb_tls_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
+{
+ struct tls_data *p;
+ ber_slen_t ret;
+ int err;
+
+ assert( sbiod != NULL );
+ assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
+
+ p = (struct tls_data *)sbiod->sbiod_pvt;
+
+ ret = gnutls_record_recv ( p->session->session, buf, len );
+ switch (ret) {
+ case GNUTLS_E_INTERRUPTED:
+ case GNUTLS_E_AGAIN:
+ sbiod->sbiod_sb->sb_trans_needs_read = 1;
+ sock_errset(EWOULDBLOCK);
+ ret = 0;
+ break;
+ case GNUTLS_E_REHANDSHAKE:
+ for ( ret = gnutls_handshake ( p->session->session );
+ ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN;
+ ret = gnutls_handshake ( p->session->session ) );
+ sbiod->sbiod_sb->sb_trans_needs_read = 1;
+ ret = 0;
+ break;
+ default:
+ sbiod->sbiod_sb->sb_trans_needs_read = 0;
+ }
+ return ret;
+}
+
+static ber_slen_t
+sb_tls_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
+{
+ struct tls_data *p;
+ ber_slen_t ret;
+ int err;
+
+ assert( sbiod != NULL );
+ assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
+
+ p = (struct tls_data *)sbiod->sbiod_pvt;
+
+ ret = gnutls_record_send ( p->session->session, (char *)buf, len );
+
+ if ( ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN ) {
+ sbiod->sbiod_sb->sb_trans_needs_write = 1;
+ sock_errset(EWOULDBLOCK);
+ ret = 0;
+ } else {
+ sbiod->sbiod_sb->sb_trans_needs_write = 0;
+ }
+ return ret;
+}
+
+static Sockbuf_IO sb_tls_sbio =
+{
+ sb_tls_setup, /* sbi_setup */
+ sb_tls_remove, /* sbi_remove */
+ sb_tls_ctrl, /* sbi_ctrl */
+ sb_tls_read, /* sbi_read */
+ sb_tls_write, /* sbi_write */
+ sb_tls_close /* sbi_close */
+};
+
+/*
+ * Call this to do a TLS connect on a sockbuf. ctx_arg can be
+ * a SSL_CTX * or NULL, in which case the default ctx is used.
+ *
+ * Return value:
+ *
+ * 0 - Success. Connection is ready for communication.
+ * <0 - Error. Can't create a TLS stream.
+ * >0 - Partial success.
+ * Do a select (using information from lber_pvt_sb_needs_{read,write}
+ * and call again.
+ */
+
+static int
+ldap_int_tls_connect( LDAP *ld, LDAPConn *conn )
+{
+ Sockbuf *sb = conn->lconn_sb;
+ int err;
+ ldap_pvt_gnutls_session_t *ssl;
+
+ if ( HAS_TLS( sb ) ) {
+ ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
+
+ } else {
+ struct ldapoptions *lo;
+ ldap_pvt_tls_ctx_t *ctx;
+
+ ctx = ld->ld_options.ldo_tls_ctx;
+
+ ssl = alloc_handle( ctx, 0 );
+
+ if ( ssl == NULL ) return -1;
+
+#ifdef LDAP_DEBUG
+ ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
+ LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
+#endif
+ ber_sockbuf_add_io( sb, &sb_tls_sbio,
+ LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
+
+ lo = LDAP_INT_GLOBAL_OPT();
+ if( ctx == NULL ) {
+ ctx = lo->ldo_tls_ctx;
+ ldap_pvt_tls_ctx_ref( ctx );
+ ld->ld_options.ldo_tls_ctx = ctx;
+ }
+ if ( ld->ld_options.ldo_tls_connect_cb )
+ ld->ld_options.ldo_tls_connect_cb( ld, ssl, ctx,
+ ld->ld_options.ldo_tls_connect_arg );
+ if ( lo && lo->ldo_tls_connect_cb && lo->ldo_tls_connect_cb !=
+ ld->ld_options.ldo_tls_connect_cb )
+ lo->ldo_tls_connect_cb( ld, ssl, ctx, lo->ldo_tls_connect_arg );
+ }
+
+ err = gnutls_handshake( ssl->session );
+
+#ifdef HAVE_WINSOCK
+ errno = WSAGetLastError();
+#endif
+
+ if ( err < 0 ) {
+ if ( update_flags( sb, ssl, err )) {
+ return 1;
+ }
+
+ if ( ld->ld_error ) {
+ LDAP_FREE( ld->ld_error );
+ }
+ ld->ld_error = LDAP_STRDUP(gnutls_strerror( err ));
+#ifdef HAVE_EBCDIC
+ if ( ld->ld_error ) __etoa(ld->ld_error);
+#endif
+
+ Debug( LDAP_DEBUG_ANY,"TLS: can't connect: %s\n",
+ ld->ld_error ? ld->ld_error : "" ,0,0);
+
+ ber_sockbuf_remove_io( sb, &sb_tls_sbio,
+ LBER_SBIOD_LEVEL_TRANSPORT );
+#ifdef LDAP_DEBUG
+ ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
+ LBER_SBIOD_LEVEL_TRANSPORT );
+#endif
+ return -1;
+ }
+
+ return 0;
+}
+/*
+ * Call this to do a TLS accept on a sockbuf.
+ * Everything else is the same as with tls_connect.
+ */
+int
+ldap_pvt_tls_accept( Sockbuf *sb, void *ctx_arg )
+{
+ int err;
+ ldap_pvt_gnutls_session_t *ssl;
+
+ if ( HAS_TLS( sb ) ) {
+ ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
+
+ } else {
+ ssl = alloc_handle( ctx_arg, 1 );
+ if ( ssl == NULL ) return -1;
+
+#ifdef LDAP_DEBUG
+ ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
+ LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
+#endif
+ ber_sockbuf_add_io( sb, &sb_tls_sbio,
+ LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
+ }
+
+ err = gnutls_handshake( ssl->session );
+
+#ifdef HAVE_WINSOCK
+ errno = WSAGetLastError();
+#endif
+ if ( err < 0 ) {
+ if ( update_flags( sb, ssl, err )) return 1;
+
+ Debug( LDAP_DEBUG_ANY,"TLS: can't accept: %s.\n",
+ gnutls_strerror( err ),0,0 );
+
+ ber_sockbuf_remove_io( sb, &sb_tls_sbio,
+ LBER_SBIOD_LEVEL_TRANSPORT );
+#ifdef LDAP_DEBUG
+ ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
+ LBER_SBIOD_LEVEL_TRANSPORT );
+#endif
+ return -1;
+ }
+
+ return 0;
+}
+
+int
+ldap_pvt_tls_inplace ( Sockbuf *sb )
+{
+ return HAS_TLS( sb ) ? 1 : 0;
+}
+
+int
+ldap_tls_inplace( LDAP *ld )
+{
+ Sockbuf *sb = NULL;
+
+ if ( ld->ld_defconn && ld->ld_defconn->lconn_sb ) {
+ sb = ld->ld_defconn->lconn_sb;
+
+ } else if ( ld->ld_sb ) {
+ sb = ld->ld_sb;
+
+ } else {
+ return 0;
+ }
+
+ return ldap_pvt_tls_inplace( sb );
+}
+
+static void
+x509_cert_get_dn( struct berval *cert, struct berval *dn, int get_subject )
+{
+ BerElementBuffer berbuf;
+ BerElement *ber = (BerElement *)&berbuf;
+ ber_tag_t tag;
+ ber_len_t len;
+ ber_int_t i;
+
+ ber_init2( ber, cert, LBER_USE_DER );
+ tag = ber_skip_tag( ber, &len ); /* Sequence */
+ tag = ber_skip_tag( ber, &len ); /* Sequence */
+ tag = ber_skip_tag( ber, &len ); /* Context + Constructed (version) */
+ if ( tag == 0xa0 ) /* Version is optional */
+ tag = ber_get_int( ber, &i ); /* Int: Version */
+ tag = ber_get_int( ber, &i ); /* Int: Serial */
+ tag = ber_skip_tag( ber, &len ); /* Sequence: Signature */
+ ber_skip_data( ber, len );
+ if ( !get_subject ) {
+ tag = ber_peek_tag( ber, &len ); /* Sequence: Issuer DN */
+ } else {
+ tag = ber_skip_tag( ber, &len );
+ ber_skip_data( ber, len );
+ tag = ber_skip_tag( ber, &len ); /* Sequence: Validity */
+ ber_skip_data( ber, len );
+ tag = ber_peek_tag( ber, &len ); /* Sequence: Subject DN */
+ }
+ len = ber_ptrlen( ber );
+ dn->bv_val = cert->bv_val + len;
+ dn->bv_len = cert->bv_len - len;
+}
+
+static int
+tls_get_cert_dn( ldap_pvt_gnutls_session_t *session )
+{
+ if ( !session->peer_der_dn.bv_val ) {
+ const gnutls_datum_t *peer_cert_list;
+ int list_size;
+ struct berval bv;
+
+ peer_cert_list = gnutls_certificate_get_peers( session->session,
+ &list_size );
+ if ( !peer_cert_list ) return LDAP_INVALID_CREDENTIALS;
+
+ bv.bv_len = peer_cert_list->size;
+ bv.bv_val = peer_cert_list->data;
+
+ x509_cert_get_dn( &bv, &session->peer_der_dn, 1 );
+ }
+ return 0;
+}
+
+int
+ldap_pvt_tls_get_peer_dn( void *s, struct berval *dn,
+ LDAPDN_rewrite_dummy *func, unsigned flags )
+{
+ ldap_pvt_gnutls_session_t *session = s;
+ int rc;
+
+ rc = tls_get_cert_dn( session );
+ if ( rc ) return rc;
+
+ rc = ldap_X509dn2bv( &session->peer_der_dn, dn,
+ (LDAPDN_rewrite_func *)func, flags);
+ return rc;
+}
+
+/* what kind of hostname were we given? */
+#define IS_DNS 0
+#define IS_IP4 1
+#define IS_IP6 2
+
+int
+ldap_pvt_tls_check_hostname( LDAP *ld, void *s, const char *name_in )
+{
+ ldap_pvt_gnutls_session_t *session = s;
+ int i, ret;
+ const gnutls_datum_t *peer_cert_list;
+ int list_size;
+ struct berval bv;
+ char altname[NI_MAXHOST];
+ size_t altnamesize;
+
+ gnutls_x509_crt_t cert;
+ gnutls_datum_t *x;
+ const char *name;
+ char *ptr;
+ char *domain = NULL;
+#ifdef LDAP_PF_INET6
+ struct in6_addr addr;
+#else
+ struct in_addr addr;
+#endif
+ int n, len1 = 0, len2 = 0;
+ int ntype = IS_DNS;
+
+ if( ldap_int_hostname &&
+ ( !name_in || !strcasecmp( name_in, "localhost" ) ) )
+ {
+ name = ldap_int_hostname;
+ } else {
+ name = name_in;
+ }
+
+ peer_cert_list = gnutls_certificate_get_peers( session->session,
+ &list_size );
+ if ( !peer_cert_list ) {
+ Debug( LDAP_DEBUG_ANY,
+ "TLS: unable to get peer certificate.\n",
+ 0, 0, 0 );
+ /* If this was a fatal condition, things would have
+ * aborted long before now.
+ */
+ return LDAP_SUCCESS;
+ }
+ ret = gnutls_x509_crt_init( &cert );
+ if ( ret < 0 )
+ return LDAP_LOCAL_ERROR;
+ ret = gnutls_x509_crt_import( cert, peer_cert_list, GNUTLS_X509_FMT_DER );
+ if ( ret ) {
+ gnutls_x509_crt_deinit( cert );
+ return LDAP_LOCAL_ERROR;
+ }
+
+#ifdef LDAP_PF_INET6
+ if (name[0] == '[' && strchr(name, ']')) {
+ char *n2 = ldap_strdup(name+1);
+ *strchr(n2, ']') = 2;
+ if (inet_pton(AF_INET6, n2, &addr))
+ ntype = IS_IP6;
+ LDAP_FREE(n2);
+ } else
+#endif
+ if ((ptr = strrchr(name, '.')) && isdigit((unsigned char)ptr[1])) {
+ if (inet_aton(name, (struct in_addr *)&addr)) ntype = IS_IP4;
+ }
+
+ if (ntype == IS_DNS) {
+ len1 = strlen(name);
+ domain = strchr(name, '.');
+ if (domain) {
+ len2 = len1 - (domain-name);
+ }
+ }
+
+ for ( i=0, ret=0; ret >= 0; i++ ) {
+ altnamesize = sizeof(altname);
+ ret = gnutls_x509_crt_get_subject_alt_name( cert, i,
+ altname, &altnamesize, NULL );
+ if ( ret < 0 ) break;
+
+ /* ignore empty */
+ if ( altnamesize == 0 ) continue;
+
+ if ( ret == GNUTLS_SAN_DNSNAME ) {
+ if (ntype != IS_DNS) continue;
+
+ /* Is this an exact match? */
+ if ((len1 == altnamesize) && !strncasecmp(name, altname, len1)) {
+ break;
+ }
+
+ /* Is this a wildcard match? */
+ if (domain && (altname[0] == '*') && (altname[1] == '.') &&
+ (len2 == altnamesize-1) && !strncasecmp(domain, &altname[1], len2))
+ {
+ break;
+ }
+ } else if ( ret == GNUTLS_SAN_IPADDRESS ) {
+ if (ntype == IS_DNS) continue;
+
+#ifdef LDAP_PF_INET6
+ if (ntype == IS_IP6 && altnamesize != sizeof(struct in6_addr)) {
+ continue;
+ } else
+#endif
+ if (ntype == IS_IP4 && altnamesize != sizeof(struct in_addr)) {
+ continue;
+ }
+ if (!memcmp(altname, &addr, altnamesize)) {
+ break;
+ }
+ }
+ }
+ if ( ret >= 0 ) {
+ ret = LDAP_SUCCESS;
+ } else {
+ altnamesize = sizeof(altname);
+ ret = gnutls_x509_crt_get_dn_by_oid( cert, CN_OID,
+ 0, 0, altname, &altnamesize );
+ if ( ret < 0 ) {
+ Debug( LDAP_DEBUG_ANY,
+ "TLS: unable to get common name from peer certificate.\n",
+ 0, 0, 0 );
+ ret = LDAP_CONNECT_ERROR;
+ if ( ld->ld_error ) {
+ LDAP_FREE( ld->ld_error );
+ }
+ ld->ld_error = LDAP_STRDUP(
+ _("TLS: unable to get CN from peer certificate"));
+
+ } else {
+ ret = LDAP_LOCAL_ERROR;
+ if ( len1 == altnamesize && strncasecmp(name, altname, altnamesize) == 0 ) {
+ ret = LDAP_SUCCESS;
+
+ } else if (( altname[0] == '*' ) && ( altname[1] == '.' )) {
+ /* Is this a wildcard match? */
+ if( domain &&
+ (len2 == altnamesize-1) && !strncasecmp(domain, &altname[1], len2)) {
+ ret = LDAP_SUCCESS;
+ }
+ }
+ }
+
+ if( ret == LDAP_LOCAL_ERROR ) {
+ altname[altnamesize] = '\0';
+ Debug( LDAP_DEBUG_ANY, "TLS: hostname (%s) does not match "
+ "common name in certificate (%s).\n",
+ name, altname, 0 );
+ ret = LDAP_CONNECT_ERROR;
+ if ( ld->ld_error ) {
+ LDAP_FREE( ld->ld_error );
+ }
+ ld->ld_error = LDAP_STRDUP(
+ _("TLS: hostname does not match CN in peer certificate"));
+ }
+ }
+ gnutls_x509_crt_deinit( cert );
+ return ret;
+}
+
+const char *
+ldap_pvt_tls_get_peer_issuer( void *s )
+{
+#if 0 /* currently unused; see ldap_pvt_tls_get_peer_dn() if needed */
+ gnutls_datum_t *x;
+ gnutls_x509_dn *xn;
+ char buf[2048], *p;
+
+ x = SSL_get_peer_certificate((ldap_pvt_gnutls_session_t *)s);
+
+ if (!x) return NULL;
+
+ xn = X509_get_issuer_name(x);
+ p = LDAP_STRDUP(X509_NAME_oneline(xn, buf, sizeof(buf)));
+ X509_free(x);
+ return p;
+#else
+ return NULL;
+#endif
+}
+
+int
+ldap_int_tls_config( LDAP *ld, int option, const char *arg )
+{
+ int i;
+
+ switch( option ) {
+ case LDAP_OPT_X_TLS_CACERTFILE:
+ case LDAP_OPT_X_TLS_CACERTDIR:
+ case LDAP_OPT_X_TLS_CERTFILE:
+ case LDAP_OPT_X_TLS_KEYFILE:
+ case LDAP_OPT_X_TLS_RANDOM_FILE:
+ case LDAP_OPT_X_TLS_CIPHER_SUITE:
+ case LDAP_OPT_X_TLS_DHFILE:
+ return ldap_pvt_tls_set_option( ld, option, (void *) arg );
+
+ case LDAP_OPT_X_TLS_REQUIRE_CERT:
+ case LDAP_OPT_X_TLS:
+ i = -1;
+ if ( strcasecmp( arg, "never" ) == 0 ) {
+ i = LDAP_OPT_X_TLS_NEVER ;
+
+ } else if ( strcasecmp( arg, "demand" ) == 0 ) {
+ i = LDAP_OPT_X_TLS_DEMAND ;
+
+ } else if ( strcasecmp( arg, "allow" ) == 0 ) {
+ i = LDAP_OPT_X_TLS_ALLOW ;
+
+ } else if ( strcasecmp( arg, "try" ) == 0 ) {
+ i = LDAP_OPT_X_TLS_TRY ;
+
+ } else if ( ( strcasecmp( arg, "hard" ) == 0 ) ||
+ ( strcasecmp( arg, "on" ) == 0 ) ||
+ ( strcasecmp( arg, "yes" ) == 0) ||
+ ( strcasecmp( arg, "true" ) == 0 ) )
+ {
+ i = LDAP_OPT_X_TLS_HARD ;
+ }
+
+ if (i >= 0) {
+ return ldap_pvt_tls_set_option( ld, option, &i );
+ }
+ return -1;
+ }
+ return -1;
+}
+
+int
+ldap_pvt_tls_get_option( LDAP *ld, int option, void *arg )
+{
+ struct ldapoptions *lo;
+
+ if( ld != NULL ) {
+ assert( LDAP_VALID( ld ) );
+
+ if( !LDAP_VALID( ld ) ) {
+ return LDAP_OPT_ERROR;
+ }
+
+ lo = &ld->ld_options;
+
+ } else {
+ /* Get pointer to global option structure */
+ lo = LDAP_INT_GLOBAL_OPT();
+ if ( lo == NULL ) {
+ return LDAP_NO_MEMORY;
+ }
+ }
+
+ switch( option ) {
+ case LDAP_OPT_X_TLS:
+ *(int *)arg = lo->ldo_tls_mode;
+ break;
+ case LDAP_OPT_X_TLS_CTX:
+ *(void **)arg = lo->ldo_tls_ctx;
+ if ( lo->ldo_tls_ctx ) {
+ ldap_pvt_tls_ctx_ref( lo->ldo_tls_ctx );
+ }
+ break;
+ case LDAP_OPT_X_TLS_CACERTFILE:
+ *(char **)arg = lo->ldo_tls_cacertfile ?
+ LDAP_STRDUP( lo->ldo_tls_cacertfile ) : NULL;
+ break;
+ case LDAP_OPT_X_TLS_CACERTDIR:
+ *(char **)arg = lo->ldo_tls_cacertdir ?
+ LDAP_STRDUP( lo->ldo_tls_cacertdir ) : NULL;
+ break;
+ case LDAP_OPT_X_TLS_CERTFILE:
+ *(char **)arg = lo->ldo_tls_certfile ?
+ LDAP_STRDUP( lo->ldo_tls_certfile ) : NULL;
+ break;
+ case LDAP_OPT_X_TLS_KEYFILE:
+ *(char **)arg = lo->ldo_tls_keyfile ?
+ LDAP_STRDUP( lo->ldo_tls_keyfile ) : NULL;
+ break;
+ case LDAP_OPT_X_TLS_DHFILE:
+ *(char **)arg = lo->ldo_tls_dhfile ?
+ LDAP_STRDUP( lo->ldo_tls_dhfile ) : NULL;
+ break;
+ case LDAP_OPT_X_TLS_REQUIRE_CERT:
+ *(int *)arg = lo->ldo_tls_require_cert;
+ break;
+#ifdef HAVE_OPENSSL_CRL
+ case LDAP_OPT_X_TLS_CRLCHECK:
+ *(int *)arg = lo->ldo_tls_crlcheck;
+ break;
+#endif
+ case LDAP_OPT_X_TLS_CIPHER_SUITE:
+ *(char **)arg = lo->ldo_tls_ciphersuite ?
+ LDAP_STRDUP( lo->ldo_tls_ciphersuite ) : NULL;
+ break;
+ case LDAP_OPT_X_TLS_RANDOM_FILE:
+ *(char **)arg = NULL;
+ break;
+ case LDAP_OPT_X_TLS_SSL_CTX: {
+ void *retval = 0;
+ if ( ld != NULL ) {
+ LDAPConn *conn = ld->ld_defconn;
+ if ( conn != NULL ) {
+ Sockbuf *sb = conn->lconn_sb;
+ retval = ldap_pvt_tls_sb_ctx( sb );
+ }
+ }
+ *(void **)arg = retval;
+ break;
+ }
+ case LDAP_OPT_X_TLS_CONNECT_CB:
+ *(LDAP_TLS_CONNECT_CB **)arg = lo->ldo_tls_connect_cb;
+ break;
+ case LDAP_OPT_X_TLS_CONNECT_ARG:
+ *(void **)arg = lo->ldo_tls_connect_arg;
+ break;
+ default:
+ return -1;
+ }
+ return 0;
+}
+
+int
+ldap_pvt_tls_set_option( LDAP *ld, int option, void *arg )
+{
+ struct ldapoptions *lo;
+
+ if( ld != NULL ) {
+ assert( LDAP_VALID( ld ) );
+
+ if( !LDAP_VALID( ld ) ) {
+ return LDAP_OPT_ERROR;
+ }
+
+ lo = &ld->ld_options;
+
+ } else {
+ /* Get pointer to global option structure */
+ lo = LDAP_INT_GLOBAL_OPT();
+ if ( lo == NULL ) {
+ return LDAP_NO_MEMORY;
+ }
+ }
+
+ switch( option ) {
+ case LDAP_OPT_X_TLS:
+ if ( !arg ) return -1;
+
+ switch( *(int *) arg ) {
+ case LDAP_OPT_X_TLS_NEVER:
+ case LDAP_OPT_X_TLS_DEMAND:
+ case LDAP_OPT_X_TLS_ALLOW:
+ case LDAP_OPT_X_TLS_TRY:
+ case LDAP_OPT_X_TLS_HARD:
+ if (lo != NULL) {
+ lo->ldo_tls_mode = *(int *)arg;
+ }
+
+ return 0;
+ }
+ return -1;
+
+ case LDAP_OPT_X_TLS_CTX:
+ if ( lo->ldo_tls_ctx )
+ ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx );
+ lo->ldo_tls_ctx = arg;
+ ldap_pvt_tls_ctx_ref( lo->ldo_tls_ctx );
+ return 0;
+ case LDAP_OPT_X_TLS_CONNECT_CB:
+ lo->ldo_tls_connect_cb = (LDAP_TLS_CONNECT_CB *)arg;
+ return 0;
+ case LDAP_OPT_X_TLS_CONNECT_ARG:
+ lo->ldo_tls_connect_arg = arg;
+ return 0;
+ case LDAP_OPT_X_TLS_CACERTFILE:
+ if ( lo->ldo_tls_cacertfile ) LDAP_FREE( lo->ldo_tls_cacertfile );
+ lo->ldo_tls_cacertfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
+ return 0;
+ case LDAP_OPT_X_TLS_CACERTDIR:
+ if ( lo->ldo_tls_cacertdir ) LDAP_FREE( lo->ldo_tls_cacertdir );
+ lo->ldo_tls_cacertdir = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
+ return 0;
+ case LDAP_OPT_X_TLS_CERTFILE:
+ if ( lo->ldo_tls_certfile ) LDAP_FREE( lo->ldo_tls_certfile );
+ lo->ldo_tls_certfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
+ return 0;
+ case LDAP_OPT_X_TLS_KEYFILE:
+ if ( lo->ldo_tls_keyfile ) LDAP_FREE( lo->ldo_tls_keyfile );
+ lo->ldo_tls_keyfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
+ return 0;
+ case LDAP_OPT_X_TLS_DHFILE:
+ if ( lo->ldo_tls_dhfile ) LDAP_FREE( lo->ldo_tls_dhfile );
+ lo->ldo_tls_dhfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
+ return 0;
+ case LDAP_OPT_X_TLS_REQUIRE_CERT:
+ if ( !arg ) return -1;
+ switch( *(int *) arg ) {
+ case LDAP_OPT_X_TLS_NEVER:
+ case LDAP_OPT_X_TLS_DEMAND:
+ case LDAP_OPT_X_TLS_ALLOW:
+ case LDAP_OPT_X_TLS_TRY:
+ case LDAP_OPT_X_TLS_HARD:
+ lo->ldo_tls_require_cert = * (int *) arg;
+ return 0;
+ }
+ return -1;
+#ifdef HAVE_OPENSSL_CRL
+ case LDAP_OPT_X_TLS_CRLCHECK:
+ if ( !arg ) return -1;
+ switch( *(int *) arg ) {
+ case LDAP_OPT_X_TLS_CRL_NONE:
+ case LDAP_OPT_X_TLS_CRL_PEER:
+ case LDAP_OPT_X_TLS_CRL_ALL:
+ lo->ldo_tls_crlcheck = * (int *) arg;
+ return 0;
+ }
+ return -1;
+#endif
+ case LDAP_OPT_X_TLS_CIPHER_SUITE:
+ if ( lo->ldo_tls_ciphersuite ) LDAP_FREE( lo->ldo_tls_ciphersuite );
+ lo->ldo_tls_ciphersuite = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
+ return 0;
+
+ case LDAP_OPT_X_TLS_RANDOM_FILE:
+ return 0;
+ break;
+
+ case LDAP_OPT_X_TLS_NEWCTX:
+ if ( !arg ) return -1;
+ if ( lo->ldo_tls_ctx )
+ ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx );
+ lo->ldo_tls_ctx = NULL;
+ return ldap_int_tls_init_ctx( lo, *(int *)arg );
+ default:
+ return -1;
+ }
+ return 0;
+}
+
+int
+ldap_int_tls_start ( LDAP *ld, LDAPConn *conn, LDAPURLDesc *srv )
+{
+ Sockbuf *sb = conn->lconn_sb;
+ char *host;
+ void *ssl;
+
+ if( srv ) {
+ host = srv->lud_host;
+ } else {
+ host = conn->lconn_server->lud_host;
+ }
+
+ /* avoid NULL host */
+ if( host == NULL ) {
+ host = "localhost";
+ }
+
+ (void) ldap_pvt_tls_init();
+
+ /*
+ * Fortunately, the lib uses blocking io...
+ */
+ if ( ldap_int_tls_connect( ld, conn ) < 0 ) {
+ ld->ld_errno = LDAP_CONNECT_ERROR;
+ return (ld->ld_errno);
+ }
+
+ ssl = ldap_pvt_tls_sb_ctx( sb );
+ assert( ssl != NULL );
+
+ /*
+ * compare host with name(s) in certificate
+ */
+ if (ld->ld_options.ldo_tls_require_cert != LDAP_OPT_X_TLS_NEVER) {
+ ld->ld_errno = ldap_pvt_tls_check_hostname( ld, ssl, host );
+ if (ld->ld_errno != LDAP_SUCCESS) {
+ return ld->ld_errno;
+ }
+ }
+
+ return LDAP_SUCCESS;
+}
+
+void *
+ldap_pvt_tls_sb_ctx( Sockbuf *sb )
+{
+ void *p;
+
+ if (HAS_TLS( sb )) {
+ ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&p );
+ return p;
+ }
+ return NULL;
+}
+
+int
+ldap_pvt_tls_get_strength( void *s )
+{
+ ldap_pvt_gnutls_session_t *session = s;
+ gnutls_cipher_algorithm_t c;
+
+ c = gnutls_cipher_get( session->session );
+ return gnutls_cipher_get_key_size( c );
+}
+
+int
+ldap_pvt_tls_get_my_dn( void *s, struct berval *dn, LDAPDN_rewrite_dummy *func, unsigned flags )
+{
+ ldap_pvt_gnutls_session_t *session = s;
+ const gnutls_datum_t *x;
+ struct berval bv, der_dn;
+ int rc;
+
+ x = gnutls_certificate_get_ours( session->session );
+
+ if (!x) return LDAP_INVALID_CREDENTIALS;
+
+ bv.bv_val = x->data;
+ bv.bv_len = x->size;
+
+ x509_cert_get_dn( &bv, &der_dn, 1 );
+ rc = ldap_X509dn2bv(&der_dn, dn, (LDAPDN_rewrite_func *)func, flags );
+ return rc;
+}
+
+int
+ldap_start_tls( LDAP *ld,
+ LDAPControl **serverctrls,
+ LDAPControl **clientctrls,
+ int *msgidp )
+{
+ return ldap_extended_operation( ld, LDAP_EXOP_START_TLS,
+ NULL, serverctrls, clientctrls, msgidp );
+}
+
+int
+ldap_install_tls( LDAP *ld )
+{
+#ifndef HAVE_TLS
+ return LDAP_NOT_SUPPORTED;
+#else
+ if ( ldap_tls_inplace( ld ) ) {
+ return LDAP_LOCAL_ERROR;
+ }
+
+ return ldap_int_tls_start( ld, ld->ld_defconn, NULL );
+#endif
+}
+
+int
+ldap_start_tls_s ( LDAP *ld,
+ LDAPControl **serverctrls,
+ LDAPControl **clientctrls )
+{
+#ifndef HAVE_TLS
+ return LDAP_NOT_SUPPORTED;
+#else
+ int rc;
+ char *rspoid = NULL;
+ struct berval *rspdata = NULL;
+
+ /* XXYYZ: this initiates operation only on default connection! */
+
+ if ( ldap_tls_inplace( ld ) ) {
+ return LDAP_LOCAL_ERROR;
+ }
+
+ rc = ldap_extended_operation_s( ld, LDAP_EXOP_START_TLS,
+ NULL, serverctrls, clientctrls, &rspoid, &rspdata );
+
+ if ( rspoid != NULL ) {
+ LDAP_FREE(rspoid);
+ }
+
+ if ( rspdata != NULL ) {
+ ber_bvfree( rspdata );
+ }
+
+ if ( rc == LDAP_SUCCESS ) {
+ rc = ldap_int_tls_start( ld, ld->ld_defconn, NULL );
+ }
+
+ return rc;
+#endif
+}
+
+/* These tags probably all belong in lber.h, but they're
+ * not normally encountered when processing LDAP, so maybe
+ * they belong somewhere else instead.
+ */
+
+#define LBER_TAG_OID ((ber_tag_t) 0x06UL)
+
+/* Tags for string types used in a DirectoryString.
+ *
+ * Note that IA5string is not one of the defined choices for
+ * DirectoryString in X.520, but it gets used for email AVAs.
+ */
+#define LBER_TAG_UTF8 ((ber_tag_t) 0x0cUL)
+#define LBER_TAG_PRINTABLE ((ber_tag_t) 0x13UL)
+#define LBER_TAG_TELETEX ((ber_tag_t) 0x14UL)
+#define LBER_TAG_IA5 ((ber_tag_t) 0x16UL)
+#define LBER_TAG_UNIVERSAL ((ber_tag_t) 0x1cUL)
+#define LBER_TAG_BMP ((ber_tag_t) 0x1eUL)
+
+static oid_name *
+find_oid( struct berval *oid )
+{
+ int i;
+
+ for ( i=0; !BER_BVISNULL( &oids[i].oid ); i++ ) {
+ if ( oids[i].oid.bv_len != oid->bv_len ) continue;
+ if ( !strcmp( oids[i].oid.bv_val, oid->bv_val ))
+ return &oids[i];
+ }
+ return NULL;
+}
+
+/* Convert a structured DN from an X.509 certificate into an LDAPV3 DN.
+ * x509_name must be raw DER. If func is non-NULL, the
+ * constructed DN will use numeric OIDs to identify attributeTypes,
+ * and the func() will be invoked to rewrite the DN with the given
+ * flags.
+ *
+ * Otherwise the DN will use shortNames from a hardcoded table.
+ */
+
+int
+ldap_X509dn2bv( void *x509_name, struct berval *bv, LDAPDN_rewrite_func *func,
+ unsigned flags )
+{
+ LDAPDN newDN;
+ LDAPRDN newRDN;
+ LDAPAVA *newAVA, *baseAVA;
+ BerElementBuffer berbuf;
+ BerElement *ber = (BerElement *)&berbuf;
+ char oids[8192], *oidptr = oids, *oidbuf = NULL;
+ void *ptrs[2048];
+ char *dn_end, *rdn_end;
+ int i, navas, nrdns, rc = LDAP_SUCCESS;
+ size_t dnsize, oidrem = sizeof(oids), oidsize = 0;
+ int csize;
+ ber_tag_t tag;
+ ber_len_t len;
+ oid_name *oidname;
+
+ struct berval Oid, Val, oid2, *in = x509_name;
+
+ assert( bv != NULL );
+
+ bv->bv_len = 0;
+ bv->bv_val = NULL;
+
+ navas = 0;
+ nrdns = 0;
+
+ /* A DN is a SEQUENCE of RDNs. An RDN is a SET of AVAs.
+ * An AVA is a SEQUENCE of attr and value.
+ * Count the number of AVAs and RDNs
+ */
+ ber_init2( ber, in, LBER_USE_DER );
+ tag = ber_peek_tag( ber, &len );
+ if ( tag != LBER_SEQUENCE )
+ return LDAP_DECODING_ERROR;
+
+ for ( tag = ber_first_element( ber, &len, &dn_end );
+ tag == LBER_SET;
+ tag = ber_next_element( ber, &len, dn_end )) {
+ nrdns++;
+ for ( tag = ber_first_element( ber, &len, &rdn_end );
+ tag == LBER_SEQUENCE;
+ tag = ber_next_element( ber, &len, rdn_end )) {
+ tag = ber_skip_tag( ber, &len );
+ ber_skip_data( ber, len );
+ navas++;
+ }
+ }
+
+ /* Allocate the DN/RDN/AVA stuff as a single block */
+ dnsize = sizeof(LDAPRDN) * (nrdns+1);
+ dnsize += sizeof(LDAPAVA *) * (navas+nrdns);
+ dnsize += sizeof(LDAPAVA) * navas;
+ if (dnsize > sizeof(ptrs)) {
+ newDN = (LDAPDN)LDAP_MALLOC( dnsize );
+ if ( newDN == NULL )
+ return LDAP_NO_MEMORY;
+ } else {
+ newDN = (LDAPDN)(char *)ptrs;
+ }
+
+ newDN[nrdns] = NULL;
+ newRDN = (LDAPRDN)(newDN + nrdns+1);
+ newAVA = (LDAPAVA *)(newRDN + navas + nrdns);
+ baseAVA = newAVA;
+
+ /* Rewind and start extracting */
+ ber_rewind( ber );
+
+ tag = ber_first_element( ber, &len, &dn_end );
+ for ( i = nrdns - 1; i >= 0; i-- ) {
+ newDN[i] = newRDN;
+
+ for ( tag = ber_first_element( ber, &len, &rdn_end );
+ tag == LBER_SEQUENCE;
+ tag = ber_next_element( ber, &len, rdn_end )) {
+
+ *newRDN++ = newAVA;
+ tag = ber_skip_tag( ber, &len );
+ tag = ber_get_stringbv( ber, &Oid, 0 );
+ if ( tag != LBER_TAG_OID ) {
+ rc = LDAP_DECODING_ERROR;
+ goto nomem;
+ }
+
+ oid2.bv_val = oidptr;
+ oid2.bv_len = oidrem;
+ ber_decode_oid( &Oid, &oid2 );
+ oidname = find_oid( &oid2 );
+ if ( !oidname ) {
+ newAVA->la_attr = oid2;
+ oidptr += oid2.bv_len + 1;
+ oidrem -= oid2.bv_len + 1;
+
+ /* Running out of OID buffer space? */
+ if (oidrem < 128) {
+ if ( oidsize == 0 ) {
+ oidsize = sizeof(oids) * 2;
+ oidrem = oidsize;
+ oidbuf = LDAP_MALLOC( oidsize );
+ if ( oidbuf == NULL ) goto nomem;
+ oidptr = oidbuf;
+ } else {
+ char *old = oidbuf;
+ oidbuf = LDAP_REALLOC( oidbuf, oidsize*2 );
+ if ( oidbuf == NULL ) goto nomem;
+ /* Buffer moved! Fix AVA pointers */
+ if ( old != oidbuf ) {
+ LDAPAVA *a;
+ long dif = oidbuf - old;
+
+ for (a=baseAVA; a<=newAVA; a++){
+ if (a->la_attr.bv_val >= old &&
+ a->la_attr.bv_val <= (old + oidsize))
+ a->la_attr.bv_val += dif;
+ }
+ }
+ oidptr = oidbuf + oidsize - oidrem;
+ oidrem += oidsize;
+ oidsize *= 2;
+ }
+ }
+ } else {
+ if ( func ) {
+ newAVA->la_attr = oidname->oid;
+ } else {
+ newAVA->la_attr = oidname->name;
+ }
+ }
+ tag = ber_get_stringbv( ber, &Val, 0 );
+ switch(tag) {
+ case LBER_TAG_UNIVERSAL:
+ /* This uses 32-bit ISO 10646-1 */
+ csize = 4; goto to_utf8;
+ case LBER_TAG_BMP:
+ /* This uses 16-bit ISO 10646-1 */
+ csize = 2; goto to_utf8;
+ case LBER_TAG_TELETEX:
+ /* This uses 8-bit, assume ISO 8859-1 */
+ csize = 1;
+to_utf8: rc = ldap_ucs_to_utf8s( &Val, csize, &newAVA->la_value );
+ newAVA->la_flags |= LDAP_AVA_FREE_VALUE;
+ if (rc != LDAP_SUCCESS) goto nomem;
+ newAVA->la_flags = LDAP_AVA_NONPRINTABLE;
+ break;
+ case LBER_TAG_UTF8:
+ newAVA->la_flags = LDAP_AVA_NONPRINTABLE;
+ /* This is already in UTF-8 encoding */
+ case LBER_TAG_IA5:
+ case LBER_TAG_PRINTABLE:
+ /* These are always 7-bit strings */
+ newAVA->la_value = Val;
+ default:
+ ;
+ }
+ newAVA->la_private = NULL;
+ newAVA->la_flags = LDAP_AVA_STRING;
+ newAVA++;
+ }
+ *newRDN++ = NULL;
+ tag = ber_next_element( ber, &len, dn_end );
+ }
+
+ if ( func ) {
+ rc = func( newDN, flags, NULL );
+ if ( rc != LDAP_SUCCESS )
+ goto nomem;
+ }
+
+ rc = ldap_dn2bv_x( newDN, bv, LDAP_DN_FORMAT_LDAPV3, NULL );
+
+nomem:
+ for (;baseAVA < newAVA; baseAVA++) {
+ if (baseAVA->la_flags & LDAP_AVA_FREE_ATTR)
+ LDAP_FREE( baseAVA->la_attr.bv_val );
+ if (baseAVA->la_flags & LDAP_AVA_FREE_VALUE)
+ LDAP_FREE( baseAVA->la_value.bv_val );
+ }
+
+ if ( oidsize != 0 )
+ LDAP_FREE( oidbuf );
+ if ( newDN != (LDAPDN)(char *) ptrs )
+ LDAP_FREE( newDN );
+ return rc;
+}
+
+#if 0
+/* test driver - feed in a DER cert on stdin */
+main( int argc, char *argv ) {
+ char buf[8192];
+ struct berval bv, bv2, dn;
+ BerElementBuffer berbuf;
+ BerElement *ber = (BerElement *)&berbuf;
+ ber_tag_t tag;
+ ber_len_t len;
+
+ bv.bv_len = fread(buf, 1, sizeof(buf), stdin);
+ bv.bv_val = buf;
+
+ ber_init2( ber, &bv, LBER_USE_DER );
+ tag = ber_skip_tag( ber, &len ); /* Sequence */
+ tag = ber_skip_tag( ber, &len ); /* Sequence */
+ tag = ber_skip_tag( ber, &len ); /* Context + Constructed (version) */
+ if ( tag == 0xa0 ) /* Version is optional */
+ tag = ber_get_int( ber, &len ); /* Int: Version */
+ tag = ber_get_int( ber, &len ); /* Int: Serial */
+ tag = ber_skip_tag( ber, &len ); /* Sequence: Signature */
+ tag = ber_skip_tag( ber, &len ); /* : Signature */
+ ber_skip_data( ber, len );
+ tag = ber_skip_tag( ber, &len ); /* : Signature */
+ ber_skip_data( ber, len );
+ tag = ber_peek_tag( ber, &len ); /* Sequence: Issuer DN */
+ len = ber_ptrlen( ber );
+ bv2.bv_val = bv.bv_val + len;
+ bv2.bv_len = bv.bv_len - len;
+ X509dn2bv( &bv2, &dn, NULL, 0 );
+ printf( "Issuer: %s\n", dn.bv_val );
+}
+#endif
+
+#endif /* HAVE_GNUTLS */
projects / openldap / commitdiff