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.\n",0,0,0);
143 if ( tls_opt_ciphersuite &&
144 !SSL_CTX_set_cipher_list( tls_def_ctx,
145 tls_opt_ciphersuite ) ) {
146 Debug( LDAP_DEBUG_ANY,
147 "TLS: could not set cipher list %s.\n",
148 tls_opt_ciphersuite, 0, 0 );
152 if (tls_opt_cacertfile != NULL || tls_opt_cacertdir != NULL) {
153 if ( !SSL_CTX_load_verify_locations( tls_def_ctx,
156 || !SSL_CTX_set_default_verify_paths( tls_def_ctx ) )
158 Debug( LDAP_DEBUG_ANY,
159 "TLS: could not load verify locations (file:`%s',dir:`%s').\n",
160 tls_opt_cacertfile,tls_opt_cacertdir,0);
164 calist = get_ca_list( tls_opt_cacertfile, tls_opt_cacertdir );
166 Debug( LDAP_DEBUG_ANY,
167 "TLS: could not load client CA list (file:`%s',dir:`%s').\n",
168 tls_opt_cacertfile,tls_opt_cacertdir,0);
172 SSL_CTX_set_client_CA_list( tls_def_ctx, calist );
174 if ( tls_opt_keyfile &&
175 !SSL_CTX_use_PrivateKey_file( tls_def_ctx,
177 SSL_FILETYPE_PEM ) ) {
178 Debug( LDAP_DEBUG_ANY,
179 "TLS: could not use key file `%s'.\n",
180 tls_opt_keyfile,0,0);
184 if ( tls_opt_certfile &&
185 !SSL_CTX_use_certificate_file( tls_def_ctx,
187 SSL_FILETYPE_PEM ) ) {
188 Debug( LDAP_DEBUG_ANY,
189 "TLS: could not use certificate `%s'.\n",
190 tls_opt_certfile,0,0);
194 if ( ( tls_opt_certfile || tls_opt_keyfile ) &&
195 !SSL_CTX_check_private_key( tls_def_ctx ) ) {
196 Debug( LDAP_DEBUG_ANY,
197 "TLS: private key mismatch.\n",
202 if ( tls_opt_trace ) {
203 SSL_CTX_set_info_callback( tls_def_ctx, tls_info_cb );
205 SSL_CTX_set_verify( tls_def_ctx,
206 tls_opt_require_cert ?
207 (SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT) :
210 SSL_CTX_set_tmp_rsa_callback( tls_def_ctx, tls_tmp_rsa_cb );
211 /* SSL_CTX_set_tmp_dh_callback( tls_def_ctx, tls_tmp_dh_cb ); */
213 #ifdef LDAP_R_COMPILE
214 ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
218 if ( tls_def_ctx != NULL ) {
219 SSL_CTX_free( tls_def_ctx );
222 #ifdef LDAP_R_COMPILE
223 ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
228 static STACK_OF(X509_NAME) *
229 get_ca_list( char * bundle, char * dir )
231 STACK_OF(X509_NAME) *ca_list = NULL;
234 ca_list = SSL_load_client_CA_file( bundle );
237 * FIXME: We have now to go over all files in dir, load them
238 * and add every certificate there to ca_list.
244 alloc_handle( void *ctx_arg )
250 ctx = (SSL_CTX *) ctx_arg;
252 if ( ldap_pvt_tls_init_def_ctx() < 0 )
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_pvt_tls_connect( LDAP *ld, Sockbuf *sb, void *ctx_arg )
561 if ( HAS_TLS( sb ) ) {
562 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
564 ssl = alloc_handle( ctx_arg );
568 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
569 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
571 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_tls,
572 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
575 err = SSL_connect( ssl );
578 errno = WSAGetLastError();
581 if ( update_flags( sb, ssl, err ))
583 if ((err = ERR_peek_error())) {
585 ld->ld_error = LDAP_STRDUP(ERR_error_string(err, buf));
587 Debug( LDAP_DEBUG_ANY,"TLS: can't connect.\n",0,0,0);
588 ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_tls,
589 LBER_SBIOD_LEVEL_TRANSPORT );
591 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
592 LBER_SBIOD_LEVEL_TRANSPORT );
600 * Call this to do a TLS accept on a sockbuf.
601 * Everything else is the same as with tls_connect.
604 ldap_pvt_tls_accept( Sockbuf *sb, void *ctx_arg )
609 if ( HAS_TLS( sb ) ) {
610 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
612 ssl = alloc_handle( ctx_arg );
616 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
617 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
619 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_tls,
620 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
623 err = SSL_accept( ssl );
626 errno = WSAGetLastError();
629 if ( update_flags( sb, ssl, err ))
631 Debug( LDAP_DEBUG_ANY,"TLS: can't accept.\n",0,0,0 );
633 ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_tls,
634 LBER_SBIOD_LEVEL_TRANSPORT );
636 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
637 LBER_SBIOD_LEVEL_TRANSPORT );
646 ldap_pvt_tls_inplace ( Sockbuf *sb )
654 ldap_pvt_tls_sb_handle( Sockbuf *sb )
659 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&p );
667 ldap_pvt_tls_get_handle( LDAP *ld )
669 return ldap_pvt_tls_sb_handle( ld->ld_sb );
673 ldap_pvt_tls_get_strength( void *s )
677 c = SSL_get_current_cipher((SSL *)s);
678 return SSL_CIPHER_get_bits(c, NULL);
683 ldap_pvt_tls_get_peer( void *s )
689 x = SSL_get_peer_certificate((SSL *)s);
694 xn = X509_get_subject_name(x);
695 p = LDAP_STRDUP(X509_NAME_oneline(xn, buf, sizeof(buf)));
701 ldap_pvt_tls_get_peer_hostname( void *s )
707 x = SSL_get_peer_certificate((SSL *)s);
712 xn = X509_get_subject_name(x);
714 if ( X509_NAME_get_text_by_NID(xn, NID_commonName, buf, sizeof(buf)) == -1 ) {
719 p = LDAP_STRDUP(buf);
725 ldap_pvt_tls_get_peer_issuer( void *s )
727 #if 0 /* currently unused; see ldap_pvt_tls_get_peer() if needed */
732 x = SSL_get_peer_certificate((SSL *)s);
737 xn = X509_get_issuer_name(x);
738 p = LDAP_STRDUP(X509_NAME_oneline(xn, buf, sizeof(buf)));
747 ldap_int_tls_config( struct ldapoptions *lo, int option, const char *arg )
752 case LDAP_OPT_X_TLS_CACERTFILE:
753 case LDAP_OPT_X_TLS_CACERTDIR:
754 case LDAP_OPT_X_TLS_CERTFILE:
755 case LDAP_OPT_X_TLS_KEYFILE:
756 case LDAP_OPT_X_TLS_RANDOM_FILE:
757 return ldap_pvt_tls_set_option( NULL, option, (void *) arg );
758 case LDAP_OPT_X_TLS_REQUIRE_CERT:
759 i = ( ( strcasecmp( arg, "on" ) == 0 ) ||
760 ( strcasecmp( arg, "yes" ) == 0) ||
761 ( strcasecmp( arg, "true" ) == 0 ) );
762 return ldap_pvt_tls_set_option( NULL, option, (void *) &i );
765 if ( strcasecmp( arg, "never" ) == 0 )
766 i = LDAP_OPT_X_TLS_NEVER ;
767 if ( strcasecmp( arg, "demand" ) == 0 )
768 i = LDAP_OPT_X_TLS_DEMAND ;
769 if ( strcasecmp( arg, "allow" ) == 0 )
770 i = LDAP_OPT_X_TLS_ALLOW ;
771 if ( strcasecmp( arg, "try" ) == 0 )
772 i = LDAP_OPT_X_TLS_TRY ;
773 if ( strcasecmp( arg, "hard" ) == 0 )
774 i = LDAP_OPT_X_TLS_HARD ;
776 return ldap_pvt_tls_set_option( lo, option, &i );
784 ldap_pvt_tls_get_option( struct ldapoptions *lo, int option, void *arg )
788 *(int *)arg = lo->ldo_tls_mode;
790 case LDAP_OPT_X_TLS_CERT:
792 *(void **)arg = (void *) tls_def_ctx;
794 *(void **)arg = lo->ldo_tls_ctx;
796 case LDAP_OPT_X_TLS_CACERTFILE:
797 *(char **)arg = tls_opt_cacertfile ?
798 LDAP_STRDUP( tls_opt_cacertfile ) : NULL;
800 case LDAP_OPT_X_TLS_CACERTDIR:
801 *(char **)arg = tls_opt_cacertdir ?
802 LDAP_STRDUP( tls_opt_cacertdir ) : NULL;
804 case LDAP_OPT_X_TLS_CERTFILE:
805 *(char **)arg = tls_opt_certfile ?
806 LDAP_STRDUP( tls_opt_certfile ) : NULL;
808 case LDAP_OPT_X_TLS_KEYFILE:
809 *(char **)arg = tls_opt_keyfile ?
810 LDAP_STRDUP( tls_opt_keyfile ) : NULL;
812 case LDAP_OPT_X_TLS_REQUIRE_CERT:
813 *(int *)arg = tls_opt_require_cert;
815 case LDAP_OPT_X_TLS_RANDOM_FILE:
816 *(char **)arg = tls_opt_randfile;
825 ldap_pvt_tls_set_option( struct ldapoptions *lo, int option, void *arg )
829 switch( *(int *) arg ) {
830 case LDAP_OPT_X_TLS_NEVER:
831 case LDAP_OPT_X_TLS_DEMAND:
832 case LDAP_OPT_X_TLS_ALLOW:
833 case LDAP_OPT_X_TLS_TRY:
834 case LDAP_OPT_X_TLS_HARD:
836 lo->ldo_tls_mode = *(int *)arg;
843 case LDAP_OPT_X_TLS_CERT:
845 tls_def_ctx = (SSL_CTX *) arg;
848 lo->ldo_tls_ctx = arg;
858 case LDAP_OPT_X_TLS_CACERTFILE:
859 if ( tls_opt_cacertfile ) LDAP_FREE( tls_opt_cacertfile );
860 tls_opt_cacertfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
862 case LDAP_OPT_X_TLS_CACERTDIR:
863 if ( tls_opt_cacertdir ) LDAP_FREE( tls_opt_cacertdir );
864 tls_opt_cacertdir = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
866 case LDAP_OPT_X_TLS_CERTFILE:
867 if ( tls_opt_certfile ) LDAP_FREE( tls_opt_certfile );
868 tls_opt_certfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
870 case LDAP_OPT_X_TLS_KEYFILE:
871 if ( tls_opt_keyfile ) LDAP_FREE( tls_opt_keyfile );
872 tls_opt_keyfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
874 case LDAP_OPT_X_TLS_REQUIRE_CERT:
875 tls_opt_require_cert = * (int *) arg;
877 case LDAP_OPT_X_TLS_CIPHER_SUITE:
878 if ( tls_opt_ciphersuite ) LDAP_FREE( tls_opt_ciphersuite );
879 tls_opt_ciphersuite = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
881 case LDAP_OPT_X_TLS_RANDOM_FILE:
882 if (tls_opt_randfile ) LDAP_FREE (tls_opt_randfile );
883 tls_opt_randfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
892 ldap_pvt_tls_start ( LDAP *ld, Sockbuf *sb, void *ctx_arg )
894 char *peer_cert_cn, *peer_hostname;
897 (void) ldap_pvt_tls_init();
900 * Fortunately, the lib uses blocking io...
902 if ( ldap_pvt_tls_connect( ld, sb, ctx_arg ) < 0 ) {
903 return LDAP_CONNECT_ERROR;
906 ssl = (void *) ldap_pvt_tls_sb_handle( sb );
908 * compare hostname of server with name in certificate
910 peer_cert_cn = ldap_pvt_tls_get_peer_hostname( ssl );
911 if ( !peer_cert_cn ) {
912 /* could not get hostname from peer certificate */
913 Debug( LDAP_DEBUG_ANY,
914 "TLS: unable to get common name from peer certificate.\n",
916 return LDAP_LOCAL_ERROR;
919 peer_hostname = ldap_host_connected_to( sb );
920 if ( !peer_hostname ) {
921 /* could not lookup hostname */
922 Debug( LDAP_DEBUG_ANY,
923 "TLS: unable to reverse lookup peer hostname.\n",
925 LDAP_FREE( peer_cert_cn );
926 return LDAP_LOCAL_ERROR;
929 if ( strcasecmp(peer_hostname, peer_cert_cn) != 0 ) {
930 Debug( LDAP_DEBUG_ANY, "TLS: hostname (%s) does not match "
931 "common name in certificate (%s).",
932 peer_hostname, peer_cert_cn, 0 );
933 LDAP_FREE( peer_cert_cn );
934 LDAP_FREE( peer_hostname );
935 return LDAP_CONNECT_ERROR;
938 LDAP_FREE( peer_cert_cn );
939 LDAP_FREE( peer_hostname );
943 * set SASL properties to TLS ssf and authid
949 /* we need to let SASL know */
950 ssf = ldap_pvt_tls_get_strength( ssl );
951 authid = ldap_pvt_tls_get_peer( ssl );
953 (void) ldap_int_sasl_external( ld, authid, ssf );
959 /* Derived from openssl/apps/s_cb.c */
961 tls_info_cb( SSL *ssl, int where, int ret )
966 w = where & ~SSL_ST_MASK;
967 if ( w & SSL_ST_CONNECT ) {
969 } else if ( w & SSL_ST_ACCEPT ) {
975 if ( where & SSL_CB_LOOP ) {
976 Debug( LDAP_DEBUG_TRACE,
977 "TLS trace: %s:%s\n",
978 op, SSL_state_string_long( ssl ), 0 );
979 } else if ( where & SSL_CB_ALERT ) {
980 op = ( where & SSL_CB_READ ) ? "read" : "write";
981 Debug( LDAP_DEBUG_TRACE,
982 "TLS trace: SSL3 alert %s:%s:%s\n",
984 SSL_alert_type_string_long( ret ),
985 SSL_alert_desc_string_long( ret) );
986 } else if ( where & SSL_CB_EXIT ) {
988 Debug( LDAP_DEBUG_TRACE,
989 "TLS trace: %s:failed in %s\n",
990 op, SSL_state_string_long( ssl ), 0 );
991 } else if ( ret < 0 ) {
992 Debug( LDAP_DEBUG_TRACE,
993 "TLS trace: %s:error in %s\n",
994 op, SSL_state_string_long( ssl ), 0 );
1000 tls_verify_cb( int ok, X509_STORE_CTX *ctx )
1010 cert = X509_STORE_CTX_get_current_cert( ctx );
1011 errnum = X509_STORE_CTX_get_error( ctx );
1012 errdepth = X509_STORE_CTX_get_error_depth( ctx );
1015 * X509_get_*_name return pointers to the internal copies of
1016 * those things requested. So do not free them.
1018 subject = X509_get_subject_name( cert );
1019 issuer = X509_get_issuer_name( cert );
1020 /* X509_NAME_oneline, if passed a NULL buf, allocate memomry */
1021 sname = X509_NAME_oneline( subject, NULL, 0 );
1022 iname = X509_NAME_oneline( issuer, NULL, 0 );
1023 Debug( LDAP_DEBUG_TRACE,
1024 "TLS certificate verification: depth: %d, subject: %s, issuer: %s\n",
1026 sname ? sname : "-unknown-",
1027 iname ? iname : "-unknown-" );
1029 CRYPTO_free ( sname );
1031 CRYPTO_free ( iname );
1036 /* Inspired by ERR_print_errors in OpenSSL */
1038 tls_report_error( void )
1045 while ( ( l = ERR_get_error_line( &file, &line ) ) != 0 ) {
1046 Debug( LDAP_DEBUG_ANY, "TLS: %s %s:%d\n",
1047 ERR_error_string( l, buf ), file, line );
1052 tls_tmp_rsa_cb( SSL *ssl, int is_export, int key_length )
1056 /* FIXME: Pregenerate the key on startup */
1057 /* FIXME: Who frees the key? */
1058 tmp_rsa = RSA_generate_key( key_length, RSA_F4, NULL, NULL );
1061 Debug( LDAP_DEBUG_ANY,
1062 "TLS: Failed to generate temporary %d-bit %s RSA key\n",
1063 key_length, is_export ? "export" : "domestic", 0 );
1070 tls_seed_PRNG( const char *randfile )
1072 #ifndef URANDOM_DEVICE
1073 /* no /dev/urandom (or equiv) */
1074 char buffer[MAXPATHLEN];
1076 if (randfile == NULL) {
1077 /* The seed file is $RANDFILE if defined, otherwise $HOME/.rnd.
1078 * If $HOME is not set or buffer too small to hold the pathname,
1079 * an error occurs. - From RAND_file_name() man page.
1080 * The fact is that when $HOME is NULL, .rnd is used.
1082 randfile = RAND_file_name( buffer, sizeof( buffer ) );
1084 } else if (RAND_egd(randfile) > 0) {
1089 if (randfile == NULL) {
1090 Debug( LDAP_DEBUG_ANY,
1091 "TLS: Use configuration file or $RANDFILE to define seed PRNG\n",
1096 RAND_load_file(randfile, -1);
1098 if (RAND_status() == 0) {
1099 Debug( LDAP_DEBUG_ANY,
1100 "TLS: PRNG not been seeded with enough data\n",
1111 tls_tmp_dh_cb( SSL *ssl, int is_export, int key_length )
1119 ldap_start_tls_s ( LDAP *ld,
1120 LDAPControl **serverctrls,
1121 LDAPControl **clientctrls )
1125 char *rspoid = NULL;
1126 struct berval *rspdata = NULL;
1128 /* XXYYZ: this initiates operaton only on default connection! */
1130 if ( ldap_pvt_tls_inplace( ld->ld_sb ) != 0 ) {
1131 return LDAP_LOCAL_ERROR;
1134 rc = ldap_extended_operation_s( ld, LDAP_EXOP_START_TLS,
1135 NULL, serverctrls, clientctrls, &rspoid, &rspdata );
1136 if ( rc != LDAP_SUCCESS ) {
1140 if ( rspoid != NULL ) {
1144 if ( rspdata != NULL ) {
1145 ber_bvfree( rspdata );
1148 rc = ldap_pvt_tls_start( ld, ld->ld_sb, ld->ld_options.ldo_tls_ctx );
1151 return LDAP_NOT_SUPPORTED;