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 )
258 ssl = SSL_new( ctx );
260 Debug( LDAP_DEBUG_ANY,"TLS: can't create ssl handle.\n",0,0,0);
264 if ( tls_opt_trace ) {
265 SSL_set_info_callback( ssl, tls_info_cb );
271 update_flags( Sockbuf *sb, SSL * ssl, int rc )
273 int err = SSL_get_error(ssl, rc);
275 sb->sb_trans_needs_read = 0;
276 sb->sb_trans_needs_write = 0;
277 if (err == SSL_ERROR_WANT_READ)
279 sb->sb_trans_needs_read = 1;
281 } else if (err == SSL_ERROR_WANT_WRITE)
283 sb->sb_trans_needs_write = 1;
285 } else if (err == SSL_ERROR_WANT_CONNECT)
293 * TLS support for LBER Sockbufs
298 Sockbuf_IO_Desc *sbiod;
301 extern BIO_METHOD ldap_pvt_sb_bio_method;
304 sb_tls_setup( Sockbuf_IO_Desc *sbiod, void *arg )
309 assert( sbiod != NULL );
311 p = LBER_MALLOC( sizeof( *p ) );
317 bio = BIO_new( &ldap_pvt_sb_bio_method );
318 bio->ptr = (void *)p;
319 SSL_set_bio( p->ssl, bio, bio );
320 sbiod->sbiod_pvt = p;
325 sb_tls_remove( Sockbuf_IO_Desc *sbiod )
329 assert( sbiod != NULL );
330 assert( sbiod->sbiod_pvt != NULL );
332 p = (struct tls_data *)sbiod->sbiod_pvt;
334 LBER_FREE( sbiod->sbiod_pvt );
335 sbiod->sbiod_pvt = NULL;
340 sb_tls_close( Sockbuf_IO_Desc *sbiod )
344 assert( sbiod != NULL );
345 assert( sbiod->sbiod_pvt != NULL );
347 p = (struct tls_data *)sbiod->sbiod_pvt;
348 SSL_shutdown( p->ssl );
353 sb_tls_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
357 assert( sbiod != NULL );
358 assert( sbiod->sbiod_pvt != NULL );
360 p = (struct tls_data *)sbiod->sbiod_pvt;
362 if ( opt == LBER_SB_OPT_GET_SSL ) {
363 *((SSL **)arg) = p->ssl;
366 } else if ( opt == LBER_SB_OPT_DATA_READY ) {
367 if( SSL_pending( p->ssl ) > 0 ) {
372 return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
376 sb_tls_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
382 assert( sbiod != NULL );
383 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
385 p = (struct tls_data *)sbiod->sbiod_pvt;
387 ret = SSL_read( p->ssl, (char *)buf, len );
389 errno = WSAGetLastError();
391 err = SSL_get_error( p->ssl, ret );
392 if (err == SSL_ERROR_WANT_READ ) {
393 sbiod->sbiod_sb->sb_trans_needs_read = 1;
399 sbiod->sbiod_sb->sb_trans_needs_read = 0;
404 sb_tls_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
410 assert( sbiod != NULL );
411 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
413 p = (struct tls_data *)sbiod->sbiod_pvt;
415 ret = SSL_write( p->ssl, (char *)buf, len );
417 errno = WSAGetLastError();
419 err = SSL_get_error( p->ssl, ret );
420 if (err == SSL_ERROR_WANT_WRITE ) {
421 sbiod->sbiod_sb->sb_trans_needs_write = 1;
427 sbiod->sbiod_sb->sb_trans_needs_write = 0;
431 Sockbuf_IO ldap_pvt_sockbuf_io_tls =
433 sb_tls_setup, /* sbi_setup */
434 sb_tls_remove, /* sbi_remove */
435 sb_tls_ctrl, /* sbi_ctrl */
436 sb_tls_read, /* sbi_read */
437 sb_tls_write, /* sbi_write */
438 sb_tls_close /* sbi_close */
442 sb_tls_bio_create( BIO *b ) {
451 sb_tls_bio_destroy( BIO *b )
456 b->ptr = NULL; /* sb_tls_remove() will free it */
463 sb_tls_bio_read( BIO *b, char *buf, int len )
468 if ( buf == NULL || len <= 0 )
471 p = (struct tls_data *)b->ptr;
473 if ( p == NULL || p->sbiod == NULL )
476 ret = LBER_SBIOD_READ_NEXT( p->sbiod, buf, len );
478 BIO_clear_retry_flags( b );
479 if ( ret < 0 && errno == EWOULDBLOCK )
480 BIO_set_retry_read( b );
486 sb_tls_bio_write( BIO *b, char *buf, int len )
491 if ( buf == NULL || len <= 0 )
494 p = (struct tls_data *)b->ptr;
496 if ( p == NULL || p->sbiod == NULL )
499 ret = LBER_SBIOD_WRITE_NEXT( p->sbiod, buf, len );
501 BIO_clear_retry_flags( b );
502 if ( ret < 0 && errno == EWOULDBLOCK )
503 BIO_set_retry_write( b );
509 sb_tls_bio_ctrl( BIO *b, int cmd, long num, char *ptr )
511 if ( cmd == BIO_CTRL_FLUSH ) {
512 /* The OpenSSL library needs this */
519 sb_tls_bio_gets( BIO *b, char *buf, int len )
525 sb_tls_bio_puts( BIO *b, char *str )
527 return sb_tls_bio_write( b, str, strlen( str ) );
530 BIO_METHOD ldap_pvt_sb_bio_method =
532 ( 100 | 0x400 ), /* it's a source/sink BIO */
544 * Call this to do a TLS connect on a sockbuf. ctx_arg can be
545 * a SSL_CTX * or NULL, in which case the default ctx is used.
549 * 0 - Success. Connection is ready for communication.
550 * <0 - Error. Can't create a TLS stream.
551 * >0 - Partial success.
552 * Do a select (using information from lber_pvt_sb_needs_{read,write}
557 ldap_pvt_tls_connect( LDAP *ld, Sockbuf *sb, void *ctx_arg )
562 if ( HAS_TLS( sb ) ) {
563 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
565 ssl = alloc_handle( ctx_arg );
569 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
570 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
572 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_tls,
573 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
576 err = SSL_connect( ssl );
579 errno = WSAGetLastError();
582 if ( update_flags( sb, ssl, err ))
584 if ((err = ERR_peek_error())) {
586 ld->ld_error = LDAP_STRDUP(ERR_error_string(err, buf));
588 Debug( LDAP_DEBUG_ANY,"TLS: can't connect.\n",0,0,0);
589 ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_tls,
590 LBER_SBIOD_LEVEL_TRANSPORT );
592 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
593 LBER_SBIOD_LEVEL_TRANSPORT );
601 * Call this to do a TLS accept on a sockbuf.
602 * Everything else is the same as with tls_connect.
605 ldap_pvt_tls_accept( Sockbuf *sb, void *ctx_arg )
610 if ( HAS_TLS( sb ) ) {
611 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
613 ssl = alloc_handle( ctx_arg );
617 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
618 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
620 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_tls,
621 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
624 err = SSL_accept( ssl );
627 errno = WSAGetLastError();
630 if ( update_flags( sb, ssl, err ))
632 Debug( LDAP_DEBUG_ANY,"TLS: can't accept.\n",0,0,0 );
634 ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_tls,
635 LBER_SBIOD_LEVEL_TRANSPORT );
637 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
638 LBER_SBIOD_LEVEL_TRANSPORT );
647 ldap_pvt_tls_inplace ( Sockbuf *sb )
655 ldap_pvt_tls_sb_handle( Sockbuf *sb )
660 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&p );
668 ldap_pvt_tls_get_handle( LDAP *ld )
670 return ldap_pvt_tls_sb_handle( ld->ld_sb );
674 ldap_pvt_tls_get_strength( void *s )
678 c = SSL_get_current_cipher((SSL *)s);
679 return SSL_CIPHER_get_bits(c, NULL);
684 ldap_pvt_tls_get_peer( void *s )
690 x = SSL_get_peer_certificate((SSL *)s);
695 xn = X509_get_subject_name(x);
696 p = LDAP_STRDUP(X509_NAME_oneline(xn, buf, sizeof(buf)));
702 ldap_pvt_tls_get_peer_dn( void *s )
706 char buf[2048], *p, *dn;
708 x = SSL_get_peer_certificate((SSL *)s);
712 xn = X509_get_subject_name(x);
713 p = X509_NAME_oneline(xn, buf, sizeof(buf));
715 dn = ldap_dcedn2dn( p );
722 ldap_pvt_tls_get_peer_hostname( void *s )
729 x = SSL_get_peer_certificate((SSL *)s);
734 xn = X509_get_subject_name(x);
736 ret = X509_NAME_get_text_by_NID(xn, NID_commonName, buf, sizeof(buf));
742 p = LDAP_STRDUP(buf);
748 ldap_pvt_tls_get_peer_issuer( void *s )
750 #if 0 /* currently unused; see ldap_pvt_tls_get_peer() if needed */
755 x = SSL_get_peer_certificate((SSL *)s);
760 xn = X509_get_issuer_name(x);
761 p = LDAP_STRDUP(X509_NAME_oneline(xn, buf, sizeof(buf)));
770 ldap_int_tls_config( struct ldapoptions *lo, int option, const char *arg )
775 case LDAP_OPT_X_TLS_CACERTFILE:
776 case LDAP_OPT_X_TLS_CACERTDIR:
777 case LDAP_OPT_X_TLS_CERTFILE:
778 case LDAP_OPT_X_TLS_KEYFILE:
779 case LDAP_OPT_X_TLS_RANDOM_FILE:
780 return ldap_pvt_tls_set_option( NULL, option, (void *) arg );
781 case LDAP_OPT_X_TLS_REQUIRE_CERT:
782 i = ( ( strcasecmp( arg, "on" ) == 0 ) ||
783 ( strcasecmp( arg, "yes" ) == 0) ||
784 ( strcasecmp( arg, "true" ) == 0 ) );
785 return ldap_pvt_tls_set_option( NULL, option, (void *) &i );
788 if ( strcasecmp( arg, "never" ) == 0 )
789 i = LDAP_OPT_X_TLS_NEVER ;
790 if ( strcasecmp( arg, "demand" ) == 0 )
791 i = LDAP_OPT_X_TLS_DEMAND ;
792 if ( strcasecmp( arg, "allow" ) == 0 )
793 i = LDAP_OPT_X_TLS_ALLOW ;
794 if ( strcasecmp( arg, "try" ) == 0 )
795 i = LDAP_OPT_X_TLS_TRY ;
796 if ( strcasecmp( arg, "hard" ) == 0 )
797 i = LDAP_OPT_X_TLS_HARD ;
799 return ldap_pvt_tls_set_option( lo, option, &i );
807 ldap_pvt_tls_get_option( struct ldapoptions *lo, int option, void *arg )
811 *(int *)arg = lo->ldo_tls_mode;
813 case LDAP_OPT_X_TLS_CERT:
815 *(void **)arg = (void *) tls_def_ctx;
817 *(void **)arg = lo->ldo_tls_ctx;
819 case LDAP_OPT_X_TLS_CACERTFILE:
820 *(char **)arg = tls_opt_cacertfile ?
821 LDAP_STRDUP( tls_opt_cacertfile ) : NULL;
823 case LDAP_OPT_X_TLS_CACERTDIR:
824 *(char **)arg = tls_opt_cacertdir ?
825 LDAP_STRDUP( tls_opt_cacertdir ) : NULL;
827 case LDAP_OPT_X_TLS_CERTFILE:
828 *(char **)arg = tls_opt_certfile ?
829 LDAP_STRDUP( tls_opt_certfile ) : NULL;
831 case LDAP_OPT_X_TLS_KEYFILE:
832 *(char **)arg = tls_opt_keyfile ?
833 LDAP_STRDUP( tls_opt_keyfile ) : NULL;
835 case LDAP_OPT_X_TLS_REQUIRE_CERT:
836 *(int *)arg = tls_opt_require_cert;
838 case LDAP_OPT_X_TLS_RANDOM_FILE:
839 *(char **)arg = tls_opt_randfile;
848 ldap_pvt_tls_set_option( struct ldapoptions *lo, int option, void *arg )
852 switch( *(int *) arg ) {
853 case LDAP_OPT_X_TLS_NEVER:
854 case LDAP_OPT_X_TLS_DEMAND:
855 case LDAP_OPT_X_TLS_ALLOW:
856 case LDAP_OPT_X_TLS_TRY:
857 case LDAP_OPT_X_TLS_HARD:
859 lo->ldo_tls_mode = *(int *)arg;
866 case LDAP_OPT_X_TLS_CERT:
868 tls_def_ctx = (SSL_CTX *) arg;
871 lo->ldo_tls_ctx = arg;
881 case LDAP_OPT_X_TLS_CACERTFILE:
882 if ( tls_opt_cacertfile ) LDAP_FREE( tls_opt_cacertfile );
883 tls_opt_cacertfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
885 case LDAP_OPT_X_TLS_CACERTDIR:
886 if ( tls_opt_cacertdir ) LDAP_FREE( tls_opt_cacertdir );
887 tls_opt_cacertdir = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
889 case LDAP_OPT_X_TLS_CERTFILE:
890 if ( tls_opt_certfile ) LDAP_FREE( tls_opt_certfile );
891 tls_opt_certfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
893 case LDAP_OPT_X_TLS_KEYFILE:
894 if ( tls_opt_keyfile ) LDAP_FREE( tls_opt_keyfile );
895 tls_opt_keyfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
897 case LDAP_OPT_X_TLS_REQUIRE_CERT:
898 tls_opt_require_cert = * (int *) arg;
900 case LDAP_OPT_X_TLS_CIPHER_SUITE:
901 if ( tls_opt_ciphersuite ) LDAP_FREE( tls_opt_ciphersuite );
902 tls_opt_ciphersuite = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
904 case LDAP_OPT_X_TLS_RANDOM_FILE:
905 if (tls_opt_randfile ) LDAP_FREE (tls_opt_randfile );
906 tls_opt_randfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
915 ldap_pvt_tls_start ( LDAP *ld, Sockbuf *sb, void *ctx_arg )
920 (void) ldap_pvt_tls_init();
923 * Fortunately, the lib uses blocking io...
925 if ( ldap_pvt_tls_connect( ld, sb, ctx_arg ) < 0 ) {
926 return LDAP_CONNECT_ERROR;
929 ssl = (void *) ldap_pvt_tls_sb_handle( sb );
930 assert( ssl != NULL );
933 * compare ld->ld_host with name in certificate
936 peer_cert_cn = ldap_pvt_tls_get_peer_hostname( ssl );
937 if ( !peer_cert_cn ) {
938 /* could not get hostname from peer certificate */
939 Debug( LDAP_DEBUG_ANY,
940 "TLS: unable to get common name from peer certificate.\n",
942 return LDAP_LOCAL_ERROR;
945 if ( strcasecmp(ld->ld_host, peer_cert_cn) != 0 ) {
946 Debug( LDAP_DEBUG_ANY, "TLS: hostname (%s) does not match "
947 "common name in certificate (%s).\n",
948 ld->ld_host, peer_cert_cn, 0 );
949 LDAP_FREE( peer_cert_cn );
950 return LDAP_CONNECT_ERROR;
953 LDAP_FREE( peer_cert_cn );
956 * set SASL properties to TLS ssf and authid
962 /* we need to let SASL know */
963 ssf = ldap_pvt_tls_get_strength( ssl );
964 authid = ldap_pvt_tls_get_peer( ssl );
966 (void) ldap_int_sasl_external( ld, authid, ssf );
972 /* Derived from openssl/apps/s_cb.c */
974 tls_info_cb( SSL *ssl, int where, int ret )
979 w = where & ~SSL_ST_MASK;
980 if ( w & SSL_ST_CONNECT ) {
982 } else if ( w & SSL_ST_ACCEPT ) {
988 if ( where & SSL_CB_LOOP ) {
989 Debug( LDAP_DEBUG_TRACE,
990 "TLS trace: %s:%s\n",
991 op, SSL_state_string_long( ssl ), 0 );
992 } else if ( where & SSL_CB_ALERT ) {
993 op = ( where & SSL_CB_READ ) ? "read" : "write";
994 Debug( LDAP_DEBUG_TRACE,
995 "TLS trace: SSL3 alert %s:%s:%s\n",
997 SSL_alert_type_string_long( ret ),
998 SSL_alert_desc_string_long( ret) );
999 } else if ( where & SSL_CB_EXIT ) {
1001 Debug( LDAP_DEBUG_TRACE,
1002 "TLS trace: %s:failed in %s\n",
1003 op, SSL_state_string_long( ssl ), 0 );
1004 } else if ( ret < 0 ) {
1005 Debug( LDAP_DEBUG_TRACE,
1006 "TLS trace: %s:error in %s\n",
1007 op, SSL_state_string_long( ssl ), 0 );
1013 tls_verify_cb( int ok, X509_STORE_CTX *ctx )
1023 cert = X509_STORE_CTX_get_current_cert( ctx );
1024 errnum = X509_STORE_CTX_get_error( ctx );
1025 errdepth = X509_STORE_CTX_get_error_depth( ctx );
1028 * X509_get_*_name return pointers to the internal copies of
1029 * those things requested. So do not free them.
1031 subject = X509_get_subject_name( cert );
1032 issuer = X509_get_issuer_name( cert );
1033 /* X509_NAME_oneline, if passed a NULL buf, allocate memomry */
1034 sname = X509_NAME_oneline( subject, NULL, 0 );
1035 iname = X509_NAME_oneline( issuer, NULL, 0 );
1036 Debug( LDAP_DEBUG_TRACE,
1037 "TLS certificate verification: depth: %d, subject: %s, issuer: %s\n",
1039 sname ? sname : "-unknown-",
1040 iname ? iname : "-unknown-" );
1042 CRYPTO_free ( sname );
1044 CRYPTO_free ( iname );
1049 /* Inspired by ERR_print_errors in OpenSSL */
1051 tls_report_error( void )
1058 while ( ( l = ERR_get_error_line( &file, &line ) ) != 0 ) {
1059 Debug( LDAP_DEBUG_ANY, "TLS: %s %s:%d\n",
1060 ERR_error_string( l, buf ), file, line );
1065 tls_tmp_rsa_cb( SSL *ssl, int is_export, int key_length )
1069 /* FIXME: Pregenerate the key on startup */
1070 /* FIXME: Who frees the key? */
1071 tmp_rsa = RSA_generate_key( key_length, RSA_F4, NULL, NULL );
1074 Debug( LDAP_DEBUG_ANY,
1075 "TLS: Failed to generate temporary %d-bit %s RSA key\n",
1076 key_length, is_export ? "export" : "domestic", 0 );
1083 tls_seed_PRNG( const char *randfile )
1085 #ifndef URANDOM_DEVICE
1086 /* no /dev/urandom (or equiv) */
1088 char buffer[MAXPATHLEN];
1090 if (randfile == NULL) {
1091 /* The seed file is $RANDFILE if defined, otherwise $HOME/.rnd.
1092 * If $HOME is not set or buffer too small to hold the pathname,
1093 * an error occurs. - From RAND_file_name() man page.
1094 * The fact is that when $HOME is NULL, .rnd is used.
1096 randfile = RAND_file_name( buffer, sizeof( buffer ) );
1098 } else if (RAND_egd(randfile) > 0) {
1103 if (randfile == NULL) {
1104 Debug( LDAP_DEBUG_ANY,
1105 "TLS: Use configuration file or $RANDFILE to define seed PRNG\n",
1110 total = RAND_load_file(randfile, -1);
1112 if (RAND_status() == 0) {
1113 Debug( LDAP_DEBUG_ANY,
1114 "TLS: PRNG not been seeded with enough data\n",
1119 /* assume if there was enough bits to seed that it's okay
1120 * to write derived bits to the file
1122 RAND_write_file(randfile);
1131 tls_tmp_dh_cb( SSL *ssl, int is_export, int key_length )
1139 ldap_start_tls_s ( LDAP *ld,
1140 LDAPControl **serverctrls,
1141 LDAPControl **clientctrls )
1145 char *rspoid = NULL;
1146 struct berval *rspdata = NULL;
1148 /* XXYYZ: this initiates operaton only on default connection! */
1150 if ( ldap_pvt_tls_inplace( ld->ld_sb ) != 0 ) {
1151 return LDAP_LOCAL_ERROR;
1154 rc = ldap_extended_operation_s( ld, LDAP_EXOP_START_TLS,
1155 NULL, serverctrls, clientctrls, &rspoid, &rspdata );
1156 if ( rc != LDAP_SUCCESS ) {
1160 if ( rspoid != NULL ) {
1164 if ( rspdata != NULL ) {
1165 ber_bvfree( rspdata );
1168 rc = ldap_pvt_tls_start( ld, ld->ld_sb, ld->ld_options.ldo_tls_ctx );
1171 return LDAP_NOT_SUPPORTED;