3 * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
4 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
6 * tls.c - Handle tls/ssl using SSLeay or OpenSSL.
13 #include <ac/stdlib.h>
15 #include <ac/socket.h>
16 #include <ac/string.h>
18 #include <ac/unistd.h>
26 #include <ldap_pvt_thread.h>
29 #ifdef HAVE_OPENSSL_SSL_H
30 #include <openssl/ssl.h>
31 #include <openssl/x509v3.h>
32 #include <openssl/err.h>
33 #include <openssl/rand.h>
34 #elif defined( HAVE_SSL_H )
38 static int tls_opt_trace = 1;
39 static char *tls_opt_certfile = NULL;
40 static char *tls_opt_keyfile = NULL;
41 static char *tls_opt_cacertfile = NULL;
42 static char *tls_opt_cacertdir = NULL;
43 static int tls_opt_require_cert = 0;
44 static char *tls_opt_ciphersuite = NULL;
45 static char *tls_opt_randfile = NULL;
47 #define HAS_TLS( sb ) ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO, \
48 (void *)&ldap_pvt_sockbuf_io_tls )
50 static void tls_report_error( void );
52 static void tls_info_cb( SSL *ssl, int where, int ret );
53 static int tls_verify_cb( int ok, X509_STORE_CTX *ctx );
54 static RSA * tls_tmp_rsa_cb( SSL *ssl, int is_export, int key_length );
55 static STACK_OF(X509_NAME) * get_ca_list( char * bundle, char * dir );
57 #if 0 /* Currently this is not used by anyone */
58 static DH * tls_tmp_dh_cb( SSL *ssl, int is_export, int key_length );
61 static SSL_CTX *tls_def_ctx = NULL;
63 static int tls_seed_PRNG( const char *randfile );
67 * provide mutexes for the SSLeay library.
69 static ldap_pvt_thread_mutex_t tls_mutexes[CRYPTO_NUM_LOCKS];
71 static void tls_locking_cb( int mode, int type, const char *file, int line )
73 if ( mode & CRYPTO_LOCK ) {
74 ldap_pvt_thread_mutex_lock( &tls_mutexes[type] );
76 ldap_pvt_thread_mutex_unlock( &tls_mutexes[type] );
81 * an extra mutex for the default ctx.
84 static ldap_pvt_thread_mutex_t tls_def_ctx_mutex;
86 static void tls_init_threads( void )
90 for( i=0; i< CRYPTO_NUM_LOCKS ; i++ ) {
91 ldap_pvt_thread_mutex_init( &tls_mutexes[i] );
93 CRYPTO_set_locking_callback( tls_locking_cb );
94 /* FIXME: the thread id should be added somehow... */
96 ldap_pvt_thread_mutex_init( &tls_def_ctx_mutex );
98 #endif /* LDAP_R_COMPILE */
101 * Initialize TLS subsystem. Should be called only once.
104 ldap_pvt_tls_init( void )
106 static int tls_initialized = 0;
108 if ( tls_initialized ) return 0;
111 (void) tls_seed_PRNG( tls_opt_randfile );
113 #ifdef LDAP_R_COMPILE
117 SSL_load_error_strings();
118 SSLeay_add_ssl_algorithms();
120 /* FIXME: mod_ssl does this */
121 X509V3_add_standard_extensions();
126 * initialize the default context
129 ldap_pvt_tls_init_def_ctx( void )
131 STACK_OF(X509_NAME) *calist;
133 #ifdef LDAP_R_COMPILE
134 ldap_pvt_thread_mutex_lock( &tls_def_ctx_mutex );
136 if ( tls_def_ctx == NULL ) {
137 tls_def_ctx = SSL_CTX_new( SSLv23_method() );
138 if ( tls_def_ctx == NULL ) {
139 Debug( LDAP_DEBUG_ANY,
140 "TLS: could not allocate default ctx (%d).\n",
141 ERR_peek_error(),0,0);
144 if ( tls_opt_ciphersuite &&
145 !SSL_CTX_set_cipher_list( tls_def_ctx,
146 tls_opt_ciphersuite ) ) {
147 Debug( LDAP_DEBUG_ANY,
148 "TLS: could not set cipher list %s.\n",
149 tls_opt_ciphersuite, 0, 0 );
153 if (tls_opt_cacertfile != NULL || tls_opt_cacertdir != NULL) {
154 if ( !SSL_CTX_load_verify_locations( tls_def_ctx,
157 || !SSL_CTX_set_default_verify_paths( tls_def_ctx ) )
159 Debug( LDAP_DEBUG_ANY,
160 "TLS: could not load verify locations (file:`%s',dir:`%s').\n",
161 tls_opt_cacertfile,tls_opt_cacertdir,0);
165 calist = get_ca_list( tls_opt_cacertfile, tls_opt_cacertdir );
167 Debug( LDAP_DEBUG_ANY,
168 "TLS: could not load client CA list (file:`%s',dir:`%s').\n",
169 tls_opt_cacertfile,tls_opt_cacertdir,0);
173 SSL_CTX_set_client_CA_list( tls_def_ctx, calist );
175 if ( tls_opt_keyfile &&
176 !SSL_CTX_use_PrivateKey_file( tls_def_ctx,
178 SSL_FILETYPE_PEM ) ) {
179 Debug( LDAP_DEBUG_ANY,
180 "TLS: could not use key file `%s'.\n",
181 tls_opt_keyfile,0,0);
185 if ( tls_opt_certfile &&
186 !SSL_CTX_use_certificate_file( tls_def_ctx,
188 SSL_FILETYPE_PEM ) ) {
189 Debug( LDAP_DEBUG_ANY,
190 "TLS: could not use certificate `%s'.\n",
191 tls_opt_certfile,0,0);
195 if ( ( tls_opt_certfile || tls_opt_keyfile ) &&
196 !SSL_CTX_check_private_key( tls_def_ctx ) ) {
197 Debug( LDAP_DEBUG_ANY,
198 "TLS: private key mismatch.\n",
203 if ( tls_opt_trace ) {
204 SSL_CTX_set_info_callback( tls_def_ctx, tls_info_cb );
206 SSL_CTX_set_verify( tls_def_ctx,
207 tls_opt_require_cert ?
208 (SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT) :
211 SSL_CTX_set_tmp_rsa_callback( tls_def_ctx, tls_tmp_rsa_cb );
212 /* SSL_CTX_set_tmp_dh_callback( tls_def_ctx, tls_tmp_dh_cb ); */
214 #ifdef LDAP_R_COMPILE
215 ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
219 if ( tls_def_ctx != NULL ) {
220 SSL_CTX_free( tls_def_ctx );
223 #ifdef LDAP_R_COMPILE
224 ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
229 static STACK_OF(X509_NAME) *
230 get_ca_list( char * bundle, char * dir )
232 STACK_OF(X509_NAME) *ca_list = NULL;
235 ca_list = SSL_load_client_CA_file( bundle );
238 * FIXME: We have now to go over all files in dir, load them
239 * and add every certificate there to ca_list.
245 alloc_handle( void *ctx_arg )
251 ctx = (SSL_CTX *) ctx_arg;
253 if ( ldap_pvt_tls_init_def_ctx() < 0 ) return NULL;
257 ssl = SSL_new( ctx );
259 Debug( LDAP_DEBUG_ANY,"TLS: can't create ssl handle.\n",0,0,0);
263 if ( tls_opt_trace ) {
264 SSL_set_info_callback( ssl, tls_info_cb );
270 update_flags( Sockbuf *sb, SSL * ssl, int rc )
272 int err = SSL_get_error(ssl, rc);
274 sb->sb_trans_needs_read = 0;
275 sb->sb_trans_needs_write = 0;
276 if (err == SSL_ERROR_WANT_READ)
278 sb->sb_trans_needs_read = 1;
280 } else if (err == SSL_ERROR_WANT_WRITE)
282 sb->sb_trans_needs_write = 1;
284 } else if (err == SSL_ERROR_WANT_CONNECT)
292 * TLS support for LBER Sockbufs
297 Sockbuf_IO_Desc *sbiod;
300 extern BIO_METHOD ldap_pvt_sb_bio_method;
303 sb_tls_setup( Sockbuf_IO_Desc *sbiod, void *arg )
308 assert( sbiod != NULL );
310 p = LBER_MALLOC( sizeof( *p ) );
316 bio = BIO_new( &ldap_pvt_sb_bio_method );
317 bio->ptr = (void *)p;
318 SSL_set_bio( p->ssl, bio, bio );
319 sbiod->sbiod_pvt = p;
324 sb_tls_remove( Sockbuf_IO_Desc *sbiod )
328 assert( sbiod != NULL );
329 assert( sbiod->sbiod_pvt != NULL );
331 p = (struct tls_data *)sbiod->sbiod_pvt;
333 LBER_FREE( sbiod->sbiod_pvt );
334 sbiod->sbiod_pvt = NULL;
339 sb_tls_close( Sockbuf_IO_Desc *sbiod )
343 assert( sbiod != NULL );
344 assert( sbiod->sbiod_pvt != NULL );
346 p = (struct tls_data *)sbiod->sbiod_pvt;
347 SSL_shutdown( p->ssl );
352 sb_tls_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
356 assert( sbiod != NULL );
357 assert( sbiod->sbiod_pvt != NULL );
359 p = (struct tls_data *)sbiod->sbiod_pvt;
361 if ( opt == LBER_SB_OPT_GET_SSL ) {
362 *((SSL **)arg) = p->ssl;
365 } else if ( opt == LBER_SB_OPT_DATA_READY ) {
366 if( SSL_pending( p->ssl ) > 0 ) {
371 return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
375 sb_tls_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
381 assert( sbiod != NULL );
382 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
384 p = (struct tls_data *)sbiod->sbiod_pvt;
386 ret = SSL_read( p->ssl, (char *)buf, len );
388 errno = WSAGetLastError();
390 err = SSL_get_error( p->ssl, ret );
391 if (err == SSL_ERROR_WANT_READ ) {
392 sbiod->sbiod_sb->sb_trans_needs_read = 1;
398 sbiod->sbiod_sb->sb_trans_needs_read = 0;
403 sb_tls_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
409 assert( sbiod != NULL );
410 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
412 p = (struct tls_data *)sbiod->sbiod_pvt;
414 ret = SSL_write( p->ssl, (char *)buf, len );
416 errno = WSAGetLastError();
418 err = SSL_get_error( p->ssl, ret );
419 if (err == SSL_ERROR_WANT_WRITE ) {
420 sbiod->sbiod_sb->sb_trans_needs_write = 1;
426 sbiod->sbiod_sb->sb_trans_needs_write = 0;
430 Sockbuf_IO ldap_pvt_sockbuf_io_tls =
432 sb_tls_setup, /* sbi_setup */
433 sb_tls_remove, /* sbi_remove */
434 sb_tls_ctrl, /* sbi_ctrl */
435 sb_tls_read, /* sbi_read */
436 sb_tls_write, /* sbi_write */
437 sb_tls_close /* sbi_close */
441 sb_tls_bio_create( BIO *b ) {
450 sb_tls_bio_destroy( BIO *b )
455 b->ptr = NULL; /* sb_tls_remove() will free it */
462 sb_tls_bio_read( BIO *b, char *buf, int len )
467 if ( buf == NULL || len <= 0 )
470 p = (struct tls_data *)b->ptr;
472 if ( p == NULL || p->sbiod == NULL )
475 ret = LBER_SBIOD_READ_NEXT( p->sbiod, buf, len );
477 BIO_clear_retry_flags( b );
478 if ( ret < 0 && errno == EWOULDBLOCK )
479 BIO_set_retry_read( b );
485 sb_tls_bio_write( BIO *b, char *buf, int len )
490 if ( buf == NULL || len <= 0 )
493 p = (struct tls_data *)b->ptr;
495 if ( p == NULL || p->sbiod == NULL )
498 ret = LBER_SBIOD_WRITE_NEXT( p->sbiod, buf, len );
500 BIO_clear_retry_flags( b );
501 if ( ret < 0 && errno == EWOULDBLOCK )
502 BIO_set_retry_write( b );
508 sb_tls_bio_ctrl( BIO *b, int cmd, long num, char *ptr )
510 if ( cmd == BIO_CTRL_FLUSH ) {
511 /* The OpenSSL library needs this */
518 sb_tls_bio_gets( BIO *b, char *buf, int len )
524 sb_tls_bio_puts( BIO *b, char *str )
526 return sb_tls_bio_write( b, str, strlen( str ) );
529 BIO_METHOD ldap_pvt_sb_bio_method =
531 ( 100 | 0x400 ), /* it's a source/sink BIO */
543 * Call this to do a TLS connect on a sockbuf. ctx_arg can be
544 * a SSL_CTX * or NULL, in which case the default ctx is used.
548 * 0 - Success. Connection is ready for communication.
549 * <0 - Error. Can't create a TLS stream.
550 * >0 - Partial success.
551 * Do a select (using information from lber_pvt_sb_needs_{read,write}
556 ldap_int_tls_connect( LDAP *ld, LDAPConn *conn )
558 Sockbuf *sb = conn->lconn_sb;
562 if ( HAS_TLS( sb ) ) {
563 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
566 void *ctx = ld->ld_defconn
567 ? ld->ld_defconn->lconn_tls_ctx : NULL;
569 ssl = alloc_handle( ctx );
571 if ( ssl == NULL ) return -1;
574 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
575 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
577 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_tls,
578 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
581 conn->lconn_tls_ctx = tls_def_ctx;
585 err = SSL_connect( ssl );
588 errno = WSAGetLastError();
591 if ( update_flags( sb, ssl, err )) {
594 if ((err = ERR_peek_error())) {
596 ld->ld_error = LDAP_STRDUP(ERR_error_string(err, buf));
598 Debug( LDAP_DEBUG_ANY,"TLS: can't connect.\n",0,0,0);
599 ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_tls,
600 LBER_SBIOD_LEVEL_TRANSPORT );
602 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
603 LBER_SBIOD_LEVEL_TRANSPORT );
612 * Call this to do a TLS accept on a sockbuf.
613 * Everything else is the same as with tls_connect.
616 ldap_pvt_tls_accept( Sockbuf *sb, void *ctx_arg )
621 if ( HAS_TLS( sb ) ) {
622 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
624 ssl = alloc_handle( ctx_arg );
628 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
629 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
631 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_tls,
632 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
635 err = SSL_accept( ssl );
638 errno = WSAGetLastError();
641 if ( update_flags( sb, ssl, err ))
643 Debug( LDAP_DEBUG_ANY,"TLS: can't accept.\n",0,0,0 );
645 ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_tls,
646 LBER_SBIOD_LEVEL_TRANSPORT );
648 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
649 LBER_SBIOD_LEVEL_TRANSPORT );
658 ldap_pvt_tls_inplace ( Sockbuf *sb )
666 ldap_pvt_tls_sb_ctx( Sockbuf *sb )
671 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&p );
679 ldap_pvt_tls_get_strength( void *s )
683 c = SSL_get_current_cipher((SSL *)s);
684 return SSL_CIPHER_get_bits(c, NULL);
689 ldap_pvt_tls_get_peer( void *s )
695 x = SSL_get_peer_certificate((SSL *)s);
700 xn = X509_get_subject_name(x);
701 p = LDAP_STRDUP(X509_NAME_oneline(xn, buf, sizeof(buf)));
707 ldap_pvt_tls_get_peer_dn( void *s )
711 char buf[2048], *p, *dn;
713 x = SSL_get_peer_certificate((SSL *)s);
717 xn = X509_get_subject_name(x);
718 p = X509_NAME_oneline(xn, buf, sizeof(buf));
720 dn = ldap_dcedn2dn( p );
727 ldap_pvt_tls_get_peer_hostname( void *s )
734 x = SSL_get_peer_certificate((SSL *)s);
739 xn = X509_get_subject_name(x);
741 ret = X509_NAME_get_text_by_NID(xn, NID_commonName, buf, sizeof(buf));
747 p = LDAP_STRDUP(buf);
753 ldap_pvt_tls_get_peer_issuer( void *s )
755 #if 0 /* currently unused; see ldap_pvt_tls_get_peer() if needed */
760 x = SSL_get_peer_certificate((SSL *)s);
765 xn = X509_get_issuer_name(x);
766 p = LDAP_STRDUP(X509_NAME_oneline(xn, buf, sizeof(buf)));
775 ldap_int_tls_config( LDAP *ld, int option, const char *arg )
780 case LDAP_OPT_X_TLS_CACERTFILE:
781 case LDAP_OPT_X_TLS_CACERTDIR:
782 case LDAP_OPT_X_TLS_CERTFILE:
783 case LDAP_OPT_X_TLS_KEYFILE:
784 case LDAP_OPT_X_TLS_RANDOM_FILE:
785 return ldap_pvt_tls_set_option( NULL, option, (void *) arg );
787 case LDAP_OPT_X_TLS_REQUIRE_CERT:
788 i = ( ( strcasecmp( arg, "on" ) == 0 ) ||
789 ( strcasecmp( arg, "yes" ) == 0) ||
790 ( strcasecmp( arg, "true" ) == 0 ) );
791 return ldap_pvt_tls_set_option( NULL, option, (void *) &i );
795 if ( strcasecmp( arg, "never" ) == 0 )
796 i = LDAP_OPT_X_TLS_NEVER ;
797 if ( strcasecmp( arg, "demand" ) == 0 )
798 i = LDAP_OPT_X_TLS_DEMAND ;
799 if ( strcasecmp( arg, "allow" ) == 0 )
800 i = LDAP_OPT_X_TLS_ALLOW ;
801 if ( strcasecmp( arg, "try" ) == 0 )
802 i = LDAP_OPT_X_TLS_TRY ;
803 if ( strcasecmp( arg, "hard" ) == 0 )
804 i = LDAP_OPT_X_TLS_HARD ;
807 return ldap_pvt_tls_set_option( ld, option, &i );
816 ldap_pvt_tls_get_option( LDAP *ld, int option, void *arg )
818 struct ldapoptions *lo;
821 assert( LDAP_VALID( ld ) );
823 if( !LDAP_VALID( ld ) ) {
824 return LDAP_OPT_ERROR;
827 lo = &ld->ld_options;
830 /* Get pointer to global option structure */
831 lo = LDAP_INT_GLOBAL_OPT();
833 return LDAP_NO_MEMORY;
839 *(int *)arg = lo->ldo_tls_mode;
841 case LDAP_OPT_X_TLS_CTX:
843 *(void **)arg = (void *) tls_def_ctx;
845 *(void **)arg = ld->ld_defconn->lconn_tls_ctx;
847 case LDAP_OPT_X_TLS_CACERTFILE:
848 *(char **)arg = tls_opt_cacertfile ?
849 LDAP_STRDUP( tls_opt_cacertfile ) : NULL;
851 case LDAP_OPT_X_TLS_CACERTDIR:
852 *(char **)arg = tls_opt_cacertdir ?
853 LDAP_STRDUP( tls_opt_cacertdir ) : NULL;
855 case LDAP_OPT_X_TLS_CERTFILE:
856 *(char **)arg = tls_opt_certfile ?
857 LDAP_STRDUP( tls_opt_certfile ) : NULL;
859 case LDAP_OPT_X_TLS_KEYFILE:
860 *(char **)arg = tls_opt_keyfile ?
861 LDAP_STRDUP( tls_opt_keyfile ) : NULL;
863 case LDAP_OPT_X_TLS_REQUIRE_CERT:
864 *(int *)arg = tls_opt_require_cert;
866 case LDAP_OPT_X_TLS_RANDOM_FILE:
867 *(char **)arg = tls_opt_randfile;
876 ldap_pvt_tls_set_option( LDAP *ld, int option, void *arg )
878 struct ldapoptions *lo;
881 assert( LDAP_VALID( ld ) );
883 if( !LDAP_VALID( ld ) ) {
884 return LDAP_OPT_ERROR;
887 lo = &ld->ld_options;
890 /* Get pointer to global option structure */
891 lo = LDAP_INT_GLOBAL_OPT();
893 return LDAP_NO_MEMORY;
899 switch( *(int *) arg ) {
900 case LDAP_OPT_X_TLS_NEVER:
901 case LDAP_OPT_X_TLS_DEMAND:
902 case LDAP_OPT_X_TLS_ALLOW:
903 case LDAP_OPT_X_TLS_TRY:
904 case LDAP_OPT_X_TLS_HARD:
906 lo->ldo_tls_mode = *(int *)arg;
913 case LDAP_OPT_X_TLS_CTX:
915 tls_def_ctx = (SSL_CTX *) arg;
918 ld->ld_defconn->lconn_tls_ctx = arg;
928 case LDAP_OPT_X_TLS_CACERTFILE:
929 if ( tls_opt_cacertfile ) LDAP_FREE( tls_opt_cacertfile );
930 tls_opt_cacertfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
932 case LDAP_OPT_X_TLS_CACERTDIR:
933 if ( tls_opt_cacertdir ) LDAP_FREE( tls_opt_cacertdir );
934 tls_opt_cacertdir = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
936 case LDAP_OPT_X_TLS_CERTFILE:
937 if ( tls_opt_certfile ) LDAP_FREE( tls_opt_certfile );
938 tls_opt_certfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
940 case LDAP_OPT_X_TLS_KEYFILE:
941 if ( tls_opt_keyfile ) LDAP_FREE( tls_opt_keyfile );
942 tls_opt_keyfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
944 case LDAP_OPT_X_TLS_REQUIRE_CERT:
945 tls_opt_require_cert = * (int *) arg;
947 case LDAP_OPT_X_TLS_CIPHER_SUITE:
948 if ( tls_opt_ciphersuite ) LDAP_FREE( tls_opt_ciphersuite );
949 tls_opt_ciphersuite = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
951 case LDAP_OPT_X_TLS_RANDOM_FILE:
952 if (tls_opt_randfile ) LDAP_FREE (tls_opt_randfile );
953 tls_opt_randfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
962 ldap_int_tls_start ( LDAP *ld, LDAPConn *conn, LDAPURLDesc *srv )
964 Sockbuf *sb = conn->lconn_sb;
965 void *ctx = ld->ld_defconn->lconn_tls_ctx;
971 host = srv->lud_host;
973 host = conn->lconn_server->lud_host;
976 (void) ldap_pvt_tls_init();
979 * Fortunately, the lib uses blocking io...
981 if ( ldap_int_tls_connect( ld, conn ) < 0 ) {
982 return LDAP_CONNECT_ERROR;
985 ssl = (void *) ldap_pvt_tls_sb_ctx( sb );
986 assert( ssl != NULL );
989 * compare host with name in certificate
992 peer_cert_cn = ldap_pvt_tls_get_peer_hostname( ssl );
993 if ( !peer_cert_cn ) {
994 /* could not get hostname from peer certificate */
995 Debug( LDAP_DEBUG_ANY,
996 "TLS: unable to get common name from peer certificate.\n",
998 return LDAP_LOCAL_ERROR;
1001 if ( strcasecmp( host, peer_cert_cn ) != 0 ) {
1002 Debug( LDAP_DEBUG_ANY, "TLS: hostname (%s) does not match "
1003 "common name in certificate (%s).\n",
1004 host, peer_cert_cn, 0 );
1005 LDAP_FREE( peer_cert_cn );
1006 return LDAP_CONNECT_ERROR;
1009 LDAP_FREE( peer_cert_cn );
1012 * set SASL properties to TLS ssf and authid
1018 /* we need to let SASL know */
1019 ssf = ldap_pvt_tls_get_strength( ssl );
1020 authid = ldap_pvt_tls_get_peer( ssl );
1022 (void) ldap_int_sasl_external( ld, authid, ssf );
1025 return LDAP_SUCCESS;
1028 /* Derived from openssl/apps/s_cb.c */
1030 tls_info_cb( SSL *ssl, int where, int ret )
1035 w = where & ~SSL_ST_MASK;
1036 if ( w & SSL_ST_CONNECT ) {
1038 } else if ( w & SSL_ST_ACCEPT ) {
1044 if ( where & SSL_CB_LOOP ) {
1045 Debug( LDAP_DEBUG_TRACE,
1046 "TLS trace: %s:%s\n",
1047 op, SSL_state_string_long( ssl ), 0 );
1048 } else if ( where & SSL_CB_ALERT ) {
1049 op = ( where & SSL_CB_READ ) ? "read" : "write";
1050 Debug( LDAP_DEBUG_TRACE,
1051 "TLS trace: SSL3 alert %s:%s:%s\n",
1053 SSL_alert_type_string_long( ret ),
1054 SSL_alert_desc_string_long( ret) );
1055 } else if ( where & SSL_CB_EXIT ) {
1057 Debug( LDAP_DEBUG_TRACE,
1058 "TLS trace: %s:failed in %s\n",
1059 op, SSL_state_string_long( ssl ), 0 );
1060 } else if ( ret < 0 ) {
1061 Debug( LDAP_DEBUG_TRACE,
1062 "TLS trace: %s:error in %s\n",
1063 op, SSL_state_string_long( ssl ), 0 );
1069 tls_verify_cb( int ok, X509_STORE_CTX *ctx )
1079 cert = X509_STORE_CTX_get_current_cert( ctx );
1080 errnum = X509_STORE_CTX_get_error( ctx );
1081 errdepth = X509_STORE_CTX_get_error_depth( ctx );
1084 * X509_get_*_name return pointers to the internal copies of
1085 * those things requested. So do not free them.
1087 subject = X509_get_subject_name( cert );
1088 issuer = X509_get_issuer_name( cert );
1089 /* X509_NAME_oneline, if passed a NULL buf, allocate memomry */
1090 sname = X509_NAME_oneline( subject, NULL, 0 );
1091 iname = X509_NAME_oneline( issuer, NULL, 0 );
1092 Debug( LDAP_DEBUG_TRACE,
1093 "TLS certificate verification: depth: %d, subject: %s, issuer: %s\n",
1095 sname ? sname : "-unknown-",
1096 iname ? iname : "-unknown-" );
1098 CRYPTO_free ( sname );
1100 CRYPTO_free ( iname );
1105 /* Inspired by ERR_print_errors in OpenSSL */
1107 tls_report_error( void )
1114 while ( ( l = ERR_get_error_line( &file, &line ) ) != 0 ) {
1115 Debug( LDAP_DEBUG_ANY, "TLS: %s %s:%d\n",
1116 ERR_error_string( l, buf ), file, line );
1121 tls_tmp_rsa_cb( SSL *ssl, int is_export, int key_length )
1125 /* FIXME: Pregenerate the key on startup */
1126 /* FIXME: Who frees the key? */
1127 tmp_rsa = RSA_generate_key( key_length, RSA_F4, NULL, NULL );
1130 Debug( LDAP_DEBUG_ANY,
1131 "TLS: Failed to generate temporary %d-bit %s RSA key\n",
1132 key_length, is_export ? "export" : "domestic", 0 );
1139 tls_seed_PRNG( const char *randfile )
1141 #ifndef URANDOM_DEVICE
1142 /* no /dev/urandom (or equiv) */
1144 char buffer[MAXPATHLEN];
1146 if (randfile == NULL) {
1147 /* The seed file is $RANDFILE if defined, otherwise $HOME/.rnd.
1148 * If $HOME is not set or buffer too small to hold the pathname,
1149 * an error occurs. - From RAND_file_name() man page.
1150 * The fact is that when $HOME is NULL, .rnd is used.
1152 randfile = RAND_file_name( buffer, sizeof( buffer ) );
1154 } else if (RAND_egd(randfile) > 0) {
1159 if (randfile == NULL) {
1160 Debug( LDAP_DEBUG_ANY,
1161 "TLS: Use configuration file or $RANDFILE to define seed PRNG\n",
1166 total = RAND_load_file(randfile, -1);
1168 if (RAND_status() == 0) {
1169 Debug( LDAP_DEBUG_ANY,
1170 "TLS: PRNG not been seeded with enough data\n",
1175 /* assume if there was enough bits to seed that it's okay
1176 * to write derived bits to the file
1178 RAND_write_file(randfile);
1187 tls_tmp_dh_cb( SSL *ssl, int is_export, int key_length )
1195 ldap_start_tls_s ( LDAP *ld,
1196 LDAPControl **serverctrls,
1197 LDAPControl **clientctrls )
1202 char *rspoid = NULL;
1203 struct berval *rspdata = NULL;
1205 /* XXYYZ: this initiates operation only on default connection! */
1207 if ( ldap_pvt_tls_inplace( ld->ld_sb ) != 0 ) {
1208 return LDAP_LOCAL_ERROR;
1211 rc = ldap_extended_operation_s( ld, LDAP_EXOP_START_TLS,
1212 NULL, serverctrls, clientctrls, &rspoid, &rspdata );
1213 if ( rc != LDAP_SUCCESS ) {
1217 if ( rspoid != NULL ) {
1221 if ( rspdata != NULL ) {
1222 ber_bvfree( rspdata );
1225 rc = ldap_int_tls_start( ld, ld->ld_defconn, NULL );
1227 rc = LDAP_NOT_SUPPORTED;