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;
366 return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
370 sb_tls_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
376 assert( sbiod != NULL );
377 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
379 p = (struct tls_data *)sbiod->sbiod_pvt;
381 ret = SSL_read( p->ssl, (char *)buf, len );
383 errno = WSAGetLastError();
385 err = SSL_get_error( p->ssl, ret );
386 if (err == SSL_ERROR_WANT_READ ) {
387 sbiod->sbiod_sb->sb_trans_needs_read = 1;
393 sbiod->sbiod_sb->sb_trans_needs_read = 0;
398 sb_tls_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
404 assert( sbiod != NULL );
405 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
407 p = (struct tls_data *)sbiod->sbiod_pvt;
409 ret = SSL_write( p->ssl, (char *)buf, len );
411 errno = WSAGetLastError();
413 err = SSL_get_error( p->ssl, ret );
414 if (err == SSL_ERROR_WANT_WRITE ) {
415 sbiod->sbiod_sb->sb_trans_needs_write = 1;
421 sbiod->sbiod_sb->sb_trans_needs_write = 0;
425 Sockbuf_IO ldap_pvt_sockbuf_io_tls =
427 sb_tls_setup, /* sbi_setup */
428 sb_tls_remove, /* sbi_remove */
429 sb_tls_ctrl, /* sbi_ctrl */
430 sb_tls_read, /* sbi_read */
431 sb_tls_write, /* sbi_write */
432 sb_tls_close /* sbi_close */
436 sb_tls_bio_create( BIO *b ) {
445 sb_tls_bio_destroy( BIO *b )
450 b->ptr = NULL; /* sb_tls_remove() will free it */
457 sb_tls_bio_read( BIO *b, char *buf, int len )
462 if ( buf == NULL || len <= 0 )
465 p = (struct tls_data *)b->ptr;
467 if ( p == NULL || p->sbiod == NULL )
470 ret = LBER_SBIOD_READ_NEXT( p->sbiod, buf, len );
472 BIO_clear_retry_flags( b );
473 if ( ret < 0 && errno == EWOULDBLOCK )
474 BIO_set_retry_read( b );
480 sb_tls_bio_write( BIO *b, char *buf, int len )
485 if ( buf == NULL || len <= 0 )
488 p = (struct tls_data *)b->ptr;
490 if ( p == NULL || p->sbiod == NULL )
493 ret = LBER_SBIOD_WRITE_NEXT( p->sbiod, buf, len );
495 BIO_clear_retry_flags( b );
496 if ( ret < 0 && errno == EWOULDBLOCK )
497 BIO_set_retry_write( b );
503 sb_tls_bio_ctrl( BIO *b, int cmd, long num, char *ptr )
505 if ( cmd == BIO_CTRL_FLUSH ) {
506 /* The OpenSSL library needs this */
513 sb_tls_bio_gets( BIO *b, char *buf, int len )
519 sb_tls_bio_puts( BIO *b, char *str )
521 return sb_tls_bio_write( b, str, strlen( str ) );
524 BIO_METHOD ldap_pvt_sb_bio_method =
526 ( 100 | 0x400 ), /* it's a source/sink BIO */
538 * Call this to do a TLS connect on a sockbuf. ctx_arg can be
539 * a SSL_CTX * or NULL, in which case the default ctx is used.
543 * 0 - Success. Connection is ready for communication.
544 * <0 - Error. Can't create a TLS stream.
545 * >0 - Partial success.
546 * Do a select (using information from lber_pvt_sb_needs_{read,write}
551 ldap_pvt_tls_connect( LDAP *ld, Sockbuf *sb, void *ctx_arg )
556 if ( HAS_TLS( sb ) ) {
557 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
559 ssl = alloc_handle( ctx_arg );
563 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
564 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
566 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_tls,
567 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
570 err = SSL_connect( ssl );
573 errno = WSAGetLastError();
576 if ( update_flags( sb, ssl, err ))
578 if ((err = ERR_peek_error())) {
580 ld->ld_error = LDAP_STRDUP(ERR_error_string(err, buf));
582 Debug( LDAP_DEBUG_ANY,"TLS: can't connect.\n",0,0,0);
583 ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_tls,
584 LBER_SBIOD_LEVEL_TRANSPORT );
586 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
587 LBER_SBIOD_LEVEL_TRANSPORT );
595 * Call this to do a TLS accept on a sockbuf.
596 * Everything else is the same as with tls_connect.
599 ldap_pvt_tls_accept( Sockbuf *sb, void *ctx_arg )
604 if ( HAS_TLS( sb ) ) {
605 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
607 ssl = alloc_handle( ctx_arg );
611 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
612 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
614 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_tls,
615 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
618 err = SSL_accept( ssl );
621 errno = WSAGetLastError();
624 if ( update_flags( sb, ssl, err ))
626 Debug( LDAP_DEBUG_ANY,"TLS: can't accept.\n",0,0,0 );
628 ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_tls,
629 LBER_SBIOD_LEVEL_TRANSPORT );
631 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
632 LBER_SBIOD_LEVEL_TRANSPORT );
641 ldap_pvt_tls_inplace ( Sockbuf *sb )
649 ldap_pvt_tls_sb_handle( Sockbuf *sb )
654 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&p );
662 ldap_pvt_tls_get_handle( LDAP *ld )
664 return ldap_pvt_tls_sb_handle( ld->ld_sb );
668 ldap_pvt_tls_get_strength( void *s )
672 c = SSL_get_current_cipher((SSL *)s);
673 return SSL_CIPHER_get_bits(c, NULL);
678 ldap_pvt_tls_get_peer( void *s )
684 x = SSL_get_peer_certificate((SSL *)s);
689 xn = X509_get_subject_name(x);
690 p = LDAP_STRDUP(X509_NAME_oneline(xn, buf, sizeof(buf)));
696 ldap_pvt_tls_get_peer_issuer( void *s )
698 #if 0 /* currently unused; see ldap_pvt_tls_get_peer() if needed */
703 x = SSL_get_peer_certificate((SSL *)s);
708 xn = X509_get_issuer_name(x);
709 p = LDAP_STRDUP(X509_NAME_oneline(xn, buf, sizeof(buf)));
718 ldap_int_tls_config( struct ldapoptions *lo, int option, const char *arg )
723 case LDAP_OPT_X_TLS_CACERTFILE:
724 case LDAP_OPT_X_TLS_CACERTDIR:
725 case LDAP_OPT_X_TLS_CERTFILE:
726 case LDAP_OPT_X_TLS_KEYFILE:
727 case LDAP_OPT_X_TLS_RANDOM_FILE:
728 return ldap_pvt_tls_set_option( NULL, option, (void *) arg );
729 case LDAP_OPT_X_TLS_REQUIRE_CERT:
730 i = ( ( strcasecmp( arg, "on" ) == 0 ) ||
731 ( strcasecmp( arg, "yes" ) == 0) ||
732 ( strcasecmp( arg, "true" ) == 0 ) );
733 return ldap_pvt_tls_set_option( NULL, option, (void *) &i );
736 if ( strcasecmp( arg, "never" ) == 0 )
737 i = LDAP_OPT_X_TLS_NEVER ;
738 if ( strcasecmp( arg, "demand" ) == 0 )
739 i = LDAP_OPT_X_TLS_DEMAND ;
740 if ( strcasecmp( arg, "allow" ) == 0 )
741 i = LDAP_OPT_X_TLS_ALLOW ;
742 if ( strcasecmp( arg, "try" ) == 0 )
743 i = LDAP_OPT_X_TLS_TRY ;
744 if ( strcasecmp( arg, "hard" ) == 0 )
745 i = LDAP_OPT_X_TLS_HARD ;
747 return ldap_pvt_tls_set_option( lo, option, &i );
755 ldap_pvt_tls_get_option( struct ldapoptions *lo, int option, void *arg )
759 *(int *)arg = lo->ldo_tls_mode;
761 case LDAP_OPT_X_TLS_CERT:
763 *(void **)arg = (void *) tls_def_ctx;
765 *(void **)arg = lo->ldo_tls_ctx;
767 case LDAP_OPT_X_TLS_CACERTFILE:
768 *(char **)arg = tls_opt_cacertfile ?
769 LDAP_STRDUP( tls_opt_cacertfile ) : NULL;
771 case LDAP_OPT_X_TLS_CACERTDIR:
772 *(char **)arg = tls_opt_cacertdir ?
773 LDAP_STRDUP( tls_opt_cacertdir ) : NULL;
775 case LDAP_OPT_X_TLS_CERTFILE:
776 *(char **)arg = tls_opt_certfile ?
777 LDAP_STRDUP( tls_opt_certfile ) : NULL;
779 case LDAP_OPT_X_TLS_KEYFILE:
780 *(char **)arg = tls_opt_keyfile ?
781 LDAP_STRDUP( tls_opt_keyfile ) : NULL;
783 case LDAP_OPT_X_TLS_REQUIRE_CERT:
784 *(int *)arg = tls_opt_require_cert;
786 case LDAP_OPT_X_TLS_RANDOM_FILE:
787 *(char **)arg = tls_opt_randfile;
796 ldap_pvt_tls_set_option( struct ldapoptions *lo, int option, void *arg )
800 switch( *(int *) arg ) {
801 case LDAP_OPT_X_TLS_NEVER:
802 case LDAP_OPT_X_TLS_DEMAND:
803 case LDAP_OPT_X_TLS_ALLOW:
804 case LDAP_OPT_X_TLS_TRY:
805 case LDAP_OPT_X_TLS_HARD:
807 lo->ldo_tls_mode = *(int *)arg;
814 case LDAP_OPT_X_TLS_CERT:
816 tls_def_ctx = (SSL_CTX *) arg;
819 lo->ldo_tls_ctx = arg;
829 case LDAP_OPT_X_TLS_CACERTFILE:
830 if ( tls_opt_cacertfile ) free( tls_opt_cacertfile );
831 tls_opt_cacertfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
833 case LDAP_OPT_X_TLS_CACERTDIR:
834 if ( tls_opt_cacertdir ) free( tls_opt_cacertdir );
835 tls_opt_cacertdir = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
837 case LDAP_OPT_X_TLS_CERTFILE:
838 if ( tls_opt_certfile ) free( tls_opt_certfile );
839 tls_opt_certfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
841 case LDAP_OPT_X_TLS_KEYFILE:
842 if ( tls_opt_keyfile ) free( tls_opt_keyfile );
843 tls_opt_keyfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
845 case LDAP_OPT_X_TLS_REQUIRE_CERT:
846 tls_opt_require_cert = * (int *) arg;
848 case LDAP_OPT_X_TLS_CIPHER_SUITE:
849 if ( tls_opt_ciphersuite ) free( tls_opt_ciphersuite );
850 tls_opt_ciphersuite = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
852 case LDAP_OPT_X_TLS_RANDOM_FILE:
853 if (tls_opt_randfile ) free (tls_opt_randfile );
854 tls_opt_randfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
863 ldap_pvt_tls_start ( LDAP *ld, Sockbuf *sb, void *ctx_arg )
868 * Fortunately, the lib uses blocking io...
870 if ( ldap_pvt_tls_connect( ld, sb, ctx_arg ) < 0 ) {
871 return LDAP_CONNECT_ERROR;
874 /* FIXME: hostname of server must be compared with name in
881 /* Derived from openssl/apps/s_cb.c */
883 tls_info_cb( SSL *ssl, int where, int ret )
888 w = where & ~SSL_ST_MASK;
889 if ( w & SSL_ST_CONNECT ) {
891 } else if ( w & SSL_ST_ACCEPT ) {
897 if ( where & SSL_CB_LOOP ) {
898 Debug( LDAP_DEBUG_TRACE,
899 "TLS trace: %s:%s\n",
900 op, SSL_state_string_long( ssl ), 0 );
901 } else if ( where & SSL_CB_ALERT ) {
902 op = ( where & SSL_CB_READ ) ? "read" : "write";
903 Debug( LDAP_DEBUG_TRACE,
904 "TLS trace: SSL3 alert %s:%s:%s\n",
906 SSL_alert_type_string_long( ret ),
907 SSL_alert_desc_string_long( ret) );
908 } else if ( where & SSL_CB_EXIT ) {
910 Debug( LDAP_DEBUG_TRACE,
911 "TLS trace: %s:failed in %s\n",
912 op, SSL_state_string_long( ssl ), 0 );
913 } else if ( ret < 0 ) {
914 Debug( LDAP_DEBUG_TRACE,
915 "TLS trace: %s:error in %s\n",
916 op, SSL_state_string_long( ssl ), 0 );
922 tls_verify_cb( int ok, X509_STORE_CTX *ctx )
932 cert = X509_STORE_CTX_get_current_cert( ctx );
933 errnum = X509_STORE_CTX_get_error( ctx );
934 errdepth = X509_STORE_CTX_get_error_depth( ctx );
937 * X509_get_*_name return pointers to the internal copies of
938 * those things requested. So do not free them.
940 subject = X509_get_subject_name( cert );
941 issuer = X509_get_issuer_name( cert );
942 /* X509_NAME_oneline, if passed a NULL buf, allocate memomry */
943 sname = X509_NAME_oneline( subject, NULL, 0 );
944 iname = X509_NAME_oneline( issuer, NULL, 0 );
945 Debug( LDAP_DEBUG_TRACE,
946 "TLS certificate verification: depth: %d, subject: %s, issuer: %s\n",
948 sname ? sname : "-unknown-",
949 iname ? iname : "-unknown-" );
951 CRYPTO_free ( sname );
953 CRYPTO_free ( iname );
958 /* Inspired by ERR_print_errors in OpenSSL */
960 tls_report_error( void )
967 while ( ( l = ERR_get_error_line( &file, &line ) ) != 0 ) {
968 Debug( LDAP_DEBUG_ANY, "TLS: %s %s:%d\n",
969 ERR_error_string( l, buf ), file, line );
974 tls_tmp_rsa_cb( SSL *ssl, int is_export, int key_length )
978 /* FIXME: Pregenerate the key on startup */
979 /* FIXME: Who frees the key? */
980 tmp_rsa = RSA_generate_key( key_length, RSA_F4, NULL, NULL );
983 Debug( LDAP_DEBUG_ANY,
984 "TLS: Failed to generate temporary %d-bit %s RSA key\n",
985 key_length, is_export ? "export" : "domestic", 0 );
992 tls_seed_PRNG( const char *randfile )
994 #ifndef URANDOM_DEVICE
995 /* no /dev/urandom (or equiv) */
996 char buffer[MAXPATHLEN];
998 if (randfile == NULL) {
999 /* The seed file is $RANDFILE if defined, otherwise $HOME/.rnd.
1000 * If $HOME is not set or buffer too small to hold the pathname,
1001 * an error occurs. - From RAND_file_name() man page.
1002 * The fact is that when $HOME is NULL, .rnd is used.
1004 randfile = RAND_file_name( buffer, sizeof( buffer ) );
1006 } else if (RAND_egd(randfile) > 0) {
1011 if (randfile == NULL) {
1012 Debug( LDAP_DEBUG_ANY,
1013 "TLS: Use configuration file or $RANDFILE to define seed PRNG",
1018 RAND_load_file(randfile, -1);
1020 if (RAND_status() == 0) {
1021 Debug( LDAP_DEBUG_ANY,
1022 "TLS: PRNG not been seeded with enough data",
1033 tls_tmp_dh_cb( SSL *ssl, int is_export, int key_length )
1041 ldap_start_tls_s ( LDAP *ld,
1042 LDAPControl **serverctrls,
1043 LDAPControl **clientctrls )
1047 char *rspoid = NULL;
1048 struct berval *rspdata = NULL;
1050 /* XXYYZ: this initiates operaton only on default connection! */
1052 if ( ldap_pvt_tls_inplace( ld->ld_sb ) != 0 ) {
1053 return LDAP_LOCAL_ERROR;
1056 rc = ldap_extended_operation_s( ld, LDAP_EXOP_START_TLS,
1057 NULL, serverctrls, clientctrls, &rspoid, &rspdata );
1058 if ( rc != LDAP_SUCCESS ) {
1062 if ( rspoid != NULL ) {
1066 if ( rspdata != NULL ) {
1067 ber_bvfree( rspdata );
1070 rc = ldap_pvt_tls_start( ld, ld->ld_sb, ld->ld_options.ldo_tls_ctx );
1073 return LDAP_NOT_SUPPORTED;