1 /* tls.c - Handle tls/ssl using SSLeay, OpenSSL or GNUTLS. */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
5 * Copyright 1998-2007 The OpenLDAP Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted only as authorized by the OpenLDAP
12 * A copy of this license is available in the file LICENSE in the
13 * top-level directory of the distribution or, alternatively, at
14 * <http://www.OpenLDAP.org/license.html>.
16 /* ACKNOWLEDGEMENTS: GNUTLS support written by Howard Chu and
17 * Matt Backes; sponsored by The Written Word (thewrittenword.com)
18 * and Stanford University (stanford.edu).
22 #include "ldap_config.h"
26 #include <ac/stdlib.h>
28 #include <ac/socket.h>
29 #include <ac/string.h>
32 #include <ac/unistd.h>
34 #include <ac/dirent.h>
41 #include <ldap_pvt_thread.h>
45 #include <gnutls/gnutls.h>
46 #include <gnutls/x509.h>
49 #define DH_BITS (1024)
52 #ifdef HAVE_OPENSSL_SSL_H
53 #include <openssl/ssl.h>
54 #include <openssl/x509v3.h>
55 #include <openssl/err.h>
56 #include <openssl/rand.h>
57 #include <openssl/safestack.h>
58 #elif defined( HAVE_SSL_H )
63 #define HAS_TLS( sb ) ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO, \
64 (void *)&sb_tls_sbio )
66 /* RFC2459 minimum required set of supported attribute types
69 typedef struct oid_name {
74 #define CN_OID oids[0].oid.bv_val
76 static oid_name oids[] = {
77 { BER_BVC("2.5.4.3"), BER_BVC("cn") },
78 { BER_BVC("2.5.4.4"), BER_BVC("sn") },
79 { BER_BVC("2.5.4.6"), BER_BVC("c") },
80 { BER_BVC("2.5.4.7"), BER_BVC("l") },
81 { BER_BVC("2.5.4.8"), BER_BVC("st") },
82 { BER_BVC("2.5.4.10"), BER_BVC("o") },
83 { BER_BVC("2.5.4.11"), BER_BVC("ou") },
84 { BER_BVC("2.5.4.12"), BER_BVC("title") },
85 { BER_BVC("2.5.4.41"), BER_BVC("name") },
86 { BER_BVC("2.5.4.42"), BER_BVC("givenName") },
87 { BER_BVC("2.5.4.43"), BER_BVC("initials") },
88 { BER_BVC("2.5.4.44"), BER_BVC("generationQualifier") },
89 { BER_BVC("2.5.4.46"), BER_BVC("dnQualifier") },
90 { BER_BVC("1.2.840.113549.1.9.1"), BER_BVC("email") },
91 { BER_BVC("0.9.2342.19200300.100.1.25"), BER_BVC("dc") },
92 { BER_BVNULL, BER_BVNULL }
97 typedef struct tls_cipher_suite {
99 gnutls_kx_algorithm_t kx;
100 gnutls_cipher_algorithm_t cipher;
101 gnutls_mac_algorithm_t mac;
102 gnutls_protocol_t version;
105 static tls_cipher_suite *ciphers;
106 static int n_ciphers;
108 /* sorta replacing SSL_CTX */
109 typedef struct tls_ctx {
110 struct ldapoptions *lo;
111 gnutls_certificate_credentials_t cred;
112 gnutls_dh_params_t dh_params;
113 unsigned long verify_depth;
118 #ifdef LDAP_R_COMPILE
119 ldap_pvt_thread_mutex_t ref_mutex;
123 /* sorta replacing SSL */
124 typedef struct tls_session {
126 gnutls_session_t session;
127 struct berval peer_der_dn;
130 #ifdef LDAP_R_COMPILE
133 ldap_pvt_gcry_mutex_init( void **priv )
136 ldap_pvt_thread_mutex_t *lock = LDAP_MALLOC( sizeof( ldap_pvt_thread_mutex_t ));
141 err = ldap_pvt_thread_mutex_init( lock );
150 ldap_pvt_gcry_mutex_destroy( void **lock )
152 int err = ldap_pvt_thread_mutex_destroy( *lock );
157 ldap_pvt_gcry_mutex_lock( void **lock )
159 return ldap_pvt_thread_mutex_lock( *lock );
162 ldap_pvt_gcry_mutex_unlock( void **lock )
164 return ldap_pvt_thread_mutex_unlock( *lock );
167 static struct gcry_thread_cbs ldap_generic_thread_cbs = {
168 GCRY_THREAD_OPTION_USER,
170 ldap_pvt_gcry_mutex_init,
171 ldap_pvt_gcry_mutex_destroy,
172 ldap_pvt_gcry_mutex_lock,
173 ldap_pvt_gcry_mutex_unlock,
174 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
178 tls_init_threads( void )
180 gcry_control (GCRYCTL_SET_THREAD_CBS, &ldap_generic_thread_cbs);
182 #endif /* LDAP_R_COMPILE */
185 ldap_pvt_tls_ctx_free ( void *c )
192 #ifdef LDAP_R_COMPILE
193 ldap_pvt_thread_mutex_lock( &ctx->ref_mutex );
195 refcount = --ctx->refcount;
196 #ifdef LDAP_R_COMPILE
197 ldap_pvt_thread_mutex_unlock( &ctx->ref_mutex );
201 LDAP_FREE( ctx->kx_list );
202 gnutls_certificate_free_credentials( ctx->cred );
207 tls_ctx_new ( struct ldapoptions *lo )
211 ctx = ber_memcalloc ( 1, sizeof (*ctx) );
214 if ( gnutls_certificate_allocate_credentials( &ctx->cred )) {
219 #ifdef LDAP_R_COMPILE
220 ldap_pvt_thread_mutex_init( &ctx->ref_mutex );
227 tls_ctx_ref( tls_ctx *ctx )
229 #ifdef LDAP_R_COMPILE
230 ldap_pvt_thread_mutex_lock( &ctx->ref_mutex );
233 #ifdef LDAP_R_COMPILE
234 ldap_pvt_thread_mutex_unlock( &ctx->ref_mutex );
239 tls_session_new ( tls_ctx * ctx, int is_server )
241 tls_session *session;
243 session = ber_memcalloc ( 1, sizeof (*session) );
248 gnutls_init( &session->session, is_server ? GNUTLS_SERVER : GNUTLS_CLIENT );
249 gnutls_set_default_priority( session->session );
250 if ( ctx->kx_list ) {
251 gnutls_kx_set_priority( session->session, ctx->kx_list );
252 gnutls_cipher_set_priority( session->session, ctx->cipher_list );
253 gnutls_mac_set_priority( session->session, ctx->mac_list );
256 gnutls_credentials_set( session->session, GNUTLS_CRD_CERTIFICATE, ctx->cred );
260 if ( ctx->lo->ldo_tls_require_cert ) {
261 flag = GNUTLS_CERT_REQUEST;
262 if ( ctx->lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_DEMAND ||
263 ctx->lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_HARD )
264 flag = GNUTLS_CERT_REQUIRE;
265 gnutls_certificate_server_set_request( session->session, flag );
272 tls_session_free ( tls_session * session )
274 ber_memfree ( session );
277 #define tls_session_connect( ssl ) gnutls_handshake( ssl->session )
278 #define tls_session_accept( ssl ) gnutls_handshake( ssl->session )
280 /* suites is a string of colon-separated cipher suite names. */
282 tls_parse_ciphers( tls_ctx *ctx, char *suites )
286 int *list, nkx = 0, ncipher = 0, nmac = 0;
287 int *kx, *cipher, *mac;
292 end = strchr(ptr, ':');
297 for (i=0; i<n_ciphers; i++) {
298 if ( !strncasecmp( ciphers[i].name, ptr, len )) {
303 if ( i == n_ciphers ) {
304 /* unrecognized cipher suite */
309 /* Space for all 3 lists */
310 list = LDAP_MALLOC( (num+1) * sizeof(int) * 3 );
319 end = strchr(ptr, ':');
324 for (i=0; i<n_ciphers; i++) {
325 /* For each cipher suite, insert its algorithms into
326 * their respective priority lists. Make sure they
327 * only appear once in each list.
329 if ( !strncasecmp( ciphers[i].name, ptr, len )) {
330 for (j=0; j<nkx; j++)
331 if ( kx[j] == ciphers[i].kx )
334 kx[nkx++] = ciphers[i].kx;
335 for (j=0; j<ncipher; j++)
336 if ( cipher[j] == ciphers[i].cipher )
339 cipher[ncipher++] = ciphers[i].cipher;
340 for (j=0; j<nmac; j++)
341 if ( mac[j] == ciphers[i].mac )
344 mac[nmac++] = ciphers[i].mac;
353 ctx->cipher_list = cipher;
360 typedef SSL_CTX tls_ctx;
361 typedef SSL tls_session;
363 static int tls_opt_trace = 1;
364 static char *tls_opt_randfile = NULL;
366 static void tls_report_error( void );
368 static void tls_info_cb( const SSL *ssl, int where, int ret );
369 static int tls_verify_cb( int ok, X509_STORE_CTX *ctx );
370 static int tls_verify_ok( int ok, X509_STORE_CTX *ctx );
371 static RSA * tls_tmp_rsa_cb( SSL *ssl, int is_export, int key_length );
373 static DH * tls_tmp_dh_cb( SSL *ssl, int is_export, int key_length );
375 typedef struct dhplist {
376 struct dhplist *next;
381 static dhplist *dhparams;
383 static int tls_seed_PRNG( const char *randfile );
385 #ifdef LDAP_R_COMPILE
387 * provide mutexes for the SSLeay library.
389 static ldap_pvt_thread_mutex_t tls_mutexes[CRYPTO_NUM_LOCKS];
391 static void tls_locking_cb( int mode, int type, const char *file, int line )
393 if ( mode & CRYPTO_LOCK ) {
394 ldap_pvt_thread_mutex_lock( &tls_mutexes[type] );
396 ldap_pvt_thread_mutex_unlock( &tls_mutexes[type] );
400 static void tls_init_threads( void )
404 for( i=0; i< CRYPTO_NUM_LOCKS ; i++ ) {
405 ldap_pvt_thread_mutex_init( &tls_mutexes[i] );
407 CRYPTO_set_locking_callback( tls_locking_cb );
408 CRYPTO_set_id_callback( ldap_pvt_thread_self );
409 /* FIXME: CRYPTO_set_id_callback only works when ldap_pvt_thread_t
410 * is an integral type that fits in an unsigned long
413 #endif /* LDAP_R_COMPILE */
416 ldap_pvt_tls_ctx_free ( void *c )
423 tls_ctx_new( struct ldapoptions *lo )
425 return SSL_CTX_new( SSLv23_method() );
429 tls_ctx_ref( void *c )
432 CRYPTO_add( &ctx->references, 1, CRYPTO_LOCK_SSL_CTX );
436 tls_session_new( tls_ctx *ctx, int is_server )
438 return SSL_new( ctx );
441 #define tls_session_connect( ssl ) SSL_connect( ssl )
442 #define tls_session_accept( ssl ) SSL_accept( ssl )
444 static STACK_OF(X509_NAME) *
445 get_ca_list( char * bundle, char * dir )
447 STACK_OF(X509_NAME) *ca_list = NULL;
450 ca_list = SSL_load_client_CA_file( bundle );
452 #if defined(HAVE_DIRENT_H) || defined(dirent)
457 ca_list = sk_X509_NAME_new_null();
460 if ( !SSL_add_dir_cert_subjects_to_stack( ca_list, dir ) &&
462 sk_X509_NAME_free( ca_list );
470 #endif /* HAVE_GNUTLS */
472 #ifdef LDAP_R_COMPILE
474 * an extra mutex for the default ctx.
476 static ldap_pvt_thread_mutex_t tls_def_ctx_mutex;
480 ldap_int_tls_destroy( struct ldapoptions *lo )
482 if ( lo->ldo_tls_ctx ) {
483 ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx );
484 lo->ldo_tls_ctx = NULL;
487 if ( lo->ldo_tls_certfile ) {
488 LDAP_FREE( lo->ldo_tls_certfile );
489 lo->ldo_tls_certfile = NULL;
491 if ( lo->ldo_tls_keyfile ) {
492 LDAP_FREE( lo->ldo_tls_keyfile );
493 lo->ldo_tls_keyfile = NULL;
495 if ( lo->ldo_tls_dhfile ) {
496 LDAP_FREE( lo->ldo_tls_dhfile );
497 lo->ldo_tls_dhfile = NULL;
499 if ( lo->ldo_tls_cacertfile ) {
500 LDAP_FREE( lo->ldo_tls_cacertfile );
501 lo->ldo_tls_cacertfile = NULL;
503 if ( lo->ldo_tls_cacertdir ) {
504 LDAP_FREE( lo->ldo_tls_cacertdir );
505 lo->ldo_tls_cacertdir = NULL;
507 if ( lo->ldo_tls_ciphersuite ) {
508 LDAP_FREE( lo->ldo_tls_ciphersuite );
509 lo->ldo_tls_ciphersuite = NULL;
512 if ( lo->ldo_tls_crlfile ) {
513 LDAP_FREE( lo->ldo_tls_crlfile );
514 lo->ldo_tls_crlfile = NULL;
520 * Tear down the TLS subsystem. Should only be called once.
523 ldap_pvt_tls_destroy( void )
525 struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT();
527 ldap_int_tls_destroy( lo );
530 LDAP_FREE( ciphers );
533 gnutls_global_deinit();
539 if ( tls_opt_randfile ) {
540 LDAP_FREE( tls_opt_randfile );
541 tls_opt_randfile = NULL;
547 * Initialize TLS subsystem. Should be called only once.
550 ldap_pvt_tls_init( void )
552 static int tls_initialized = 0;
554 if ( tls_initialized++ ) return 0;
556 #ifdef LDAP_R_COMPILE
558 ldap_pvt_thread_mutex_init( &tls_def_ctx_mutex );
562 gnutls_global_init ();
564 /* GNUtls cipher suite handling: The library ought to parse suite
565 * names for us, but it doesn't. It will return a list of suite names
566 * that it supports, so we can do parsing ourselves. It ought to tell
567 * us how long the list is, but it doesn't do that either, so we just
568 * have to count it manually...
572 tls_cipher_suite *ptr, tmp;
575 while ( gnutls_cipher_suite_info( i, cs_id, &tmp.kx, &tmp.cipher,
576 &tmp.mac, &tmp.version ))
581 ciphers = LDAP_MALLOC(n_ciphers * sizeof(tls_cipher_suite));
584 for ( i=0; i<n_ciphers; i++ ) {
585 ciphers[i].name = gnutls_cipher_suite_info( i, cs_id,
586 &ciphers[i].kx, &ciphers[i].cipher, &ciphers[i].mac,
587 &ciphers[i].version );
591 #else /* !HAVE_GNUTLS */
595 char *file = LDAP_STRDUP( tls_opt_randfile );
596 if ( file ) __atoe( file );
597 (void) tls_seed_PRNG( file );
601 (void) tls_seed_PRNG( tls_opt_randfile );
604 SSL_load_error_strings();
605 SSLeay_add_ssl_algorithms();
607 /* FIXME: mod_ssl does this */
608 X509V3_add_standard_extensions();
610 #endif /* HAVE_GNUTLS */
615 * initialize a new TLS context
618 ldap_int_tls_init_ctx( struct ldapoptions *lo, int is_server )
621 char *ciphersuite = lo->ldo_tls_ciphersuite;
622 char *cacertfile = lo->ldo_tls_cacertfile;
623 char *cacertdir = lo->ldo_tls_cacertdir;
624 char *certfile = lo->ldo_tls_certfile;
625 char *keyfile = lo->ldo_tls_keyfile;
627 char *crlfile = lo->ldo_tls_crlfile;
629 char *dhfile = lo->ldo_tls_dhfile;
632 if ( lo->ldo_tls_ctx )
637 if ( is_server && !certfile && !keyfile && !cacertfile && !cacertdir ) {
638 /* minimum configuration not provided */
639 return LDAP_NOT_SUPPORTED;
643 /* This ASCII/EBCDIC handling is a real pain! */
645 ciphersuite = LDAP_STRDUP( ciphersuite );
646 __atoe( ciphersuite );
649 cacertfile = LDAP_STRDUP( cacertfile );
650 __atoe( cacertfile );
653 certfile = LDAP_STRDUP( certfile );
657 keyfile = LDAP_STRDUP( keyfile );
662 crlfile = LDAP_STRDUP( crlfile );
667 cacertdir = LDAP_STRDUP( cacertdir );
671 dhfile = LDAP_STRDUP( dhfile );
676 lo->ldo_tls_ctx = tls_ctx_new( lo );
677 if ( lo->ldo_tls_ctx == NULL ) {
679 Debug( LDAP_DEBUG_ANY,
680 "TLS: could not allocate default ctx.\n",
683 Debug( LDAP_DEBUG_ANY,
684 "TLS: could not allocate default ctx (%lu).\n",
685 ERR_peek_error(),0,0);
692 if ( lo->ldo_tls_ciphersuite &&
693 tls_parse_ciphers( lo->ldo_tls_ctx,
695 Debug( LDAP_DEBUG_ANY,
696 "TLS: could not set cipher list %s.\n",
697 lo->ldo_tls_ciphersuite, 0, 0 );
702 if (lo->ldo_tls_cacertdir != NULL) {
703 Debug( LDAP_DEBUG_ANY,
704 "TLS: warning: cacertdir not implemented for gnutls\n",
708 if (lo->ldo_tls_cacertfile != NULL) {
709 rc = gnutls_certificate_set_x509_trust_file(
710 ((tls_ctx*) lo->ldo_tls_ctx)->cred,
712 GNUTLS_X509_FMT_PEM );
713 if ( rc < 0 ) goto error_exit;
716 if ( lo->ldo_tls_certfile && lo->ldo_tls_keyfile ) {
717 rc = gnutls_certificate_set_x509_key_file(
718 ((tls_ctx*) lo->ldo_tls_ctx)->cred,
721 GNUTLS_X509_FMT_PEM );
722 if ( rc ) goto error_exit;
723 } else if ( lo->ldo_tls_certfile || lo->ldo_tls_keyfile ) {
724 Debug( LDAP_DEBUG_ANY,
725 "TLS: only one of certfile and keyfile specified\n",
731 if ( lo->ldo_tls_dhfile ) {
732 Debug( LDAP_DEBUG_ANY,
733 "TLS: warning: ignoring dhfile\n",
737 if ( lo->ldo_tls_crlfile ) {
738 rc = gnutls_certificate_set_x509_crl_file(
739 ((tls_ctx*) lo->ldo_tls_ctx)->cred,
741 GNUTLS_X509_FMT_PEM );
742 if ( rc < 0 ) goto error_exit;
745 gnutls_dh_params_init (&((tls_ctx*)
746 lo->ldo_tls_ctx)->dh_params);
747 gnutls_dh_params_generate2 (((tls_ctx*)
748 lo->ldo_tls_ctx)->dh_params,
752 #else /* !HAVE_GNUTLS */
755 SSL_CTX_set_session_id_context( lo->ldo_tls_ctx,
756 (const unsigned char *) "OpenLDAP", sizeof("OpenLDAP")-1 );
759 if ( lo->ldo_tls_ciphersuite &&
760 !SSL_CTX_set_cipher_list( lo->ldo_tls_ctx, ciphersuite ) )
762 Debug( LDAP_DEBUG_ANY,
763 "TLS: could not set cipher list %s.\n",
764 lo->ldo_tls_ciphersuite, 0, 0 );
770 if (lo->ldo_tls_cacertfile != NULL || lo->ldo_tls_cacertdir != NULL) {
771 if ( !SSL_CTX_load_verify_locations( lo->ldo_tls_ctx,
772 cacertfile, cacertdir ) ||
773 !SSL_CTX_set_default_verify_paths( lo->ldo_tls_ctx ) )
775 Debug( LDAP_DEBUG_ANY, "TLS: "
776 "could not load verify locations (file:`%s',dir:`%s').\n",
777 lo->ldo_tls_cacertfile ? lo->ldo_tls_cacertfile : "",
778 lo->ldo_tls_cacertdir ? lo->ldo_tls_cacertdir : "",
786 STACK_OF(X509_NAME) *calist;
787 /* List of CA names to send to a client */
788 calist = get_ca_list( cacertfile, cacertdir );
790 Debug( LDAP_DEBUG_ANY, "TLS: "
791 "could not load client CA list (file:`%s',dir:`%s').\n",
792 lo->ldo_tls_cacertfile ? lo->ldo_tls_cacertfile : "",
793 lo->ldo_tls_cacertdir ? lo->ldo_tls_cacertdir : "",
800 SSL_CTX_set_client_CA_list( lo->ldo_tls_ctx, calist );
804 if ( lo->ldo_tls_certfile &&
805 !SSL_CTX_use_certificate_file( lo->ldo_tls_ctx,
806 certfile, SSL_FILETYPE_PEM ) )
808 Debug( LDAP_DEBUG_ANY,
809 "TLS: could not use certificate `%s'.\n",
810 lo->ldo_tls_certfile,0,0);
816 /* Key validity is checked automatically if cert has already been set */
817 if ( lo->ldo_tls_keyfile &&
818 !SSL_CTX_use_PrivateKey_file( lo->ldo_tls_ctx,
819 keyfile, SSL_FILETYPE_PEM ) )
821 Debug( LDAP_DEBUG_ANY,
822 "TLS: could not use key file `%s'.\n",
823 lo->ldo_tls_keyfile,0,0);
829 if ( lo->ldo_tls_dhfile ) {
834 if (( bio=BIO_new_file( dhfile,"r" )) == NULL ) {
835 Debug( LDAP_DEBUG_ANY,
836 "TLS: could not use DH parameters file `%s'.\n",
837 lo->ldo_tls_dhfile,0,0);
842 while (( dh=PEM_read_bio_DHparams( bio, NULL, NULL, NULL ))) {
843 p = LDAP_MALLOC( sizeof(dhplist) );
845 p->keylength = DH_size( dh ) * 8;
854 if ( tls_opt_trace ) {
855 SSL_CTX_set_info_callback( (SSL_CTX *)lo->ldo_tls_ctx, tls_info_cb );
859 if ( lo->ldo_tls_require_cert ) {
861 if ( lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_DEMAND ||
862 lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_HARD ) {
863 i |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
867 SSL_CTX_set_verify( lo->ldo_tls_ctx, i,
868 lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_ALLOW ?
869 tls_verify_ok : tls_verify_cb );
870 SSL_CTX_set_tmp_rsa_callback( lo->ldo_tls_ctx, tls_tmp_rsa_cb );
871 if ( lo->ldo_tls_dhfile ) {
872 SSL_CTX_set_tmp_dh_callback( lo->ldo_tls_ctx, tls_tmp_dh_cb );
874 #ifdef HAVE_OPENSSL_CRL
875 if ( lo->ldo_tls_crlcheck ) {
876 X509_STORE *x509_s = SSL_CTX_get_cert_store( lo->ldo_tls_ctx );
877 if ( lo->ldo_tls_crlcheck == LDAP_OPT_X_TLS_CRL_PEER ) {
878 X509_STORE_set_flags( x509_s, X509_V_FLAG_CRL_CHECK );
879 } else if ( lo->ldo_tls_crlcheck == LDAP_OPT_X_TLS_CRL_ALL ) {
880 X509_STORE_set_flags( x509_s,
881 X509_V_FLAG_CRL_CHECK | X509_V_FLAG_CRL_CHECK_ALL );
886 #endif /* HAVE_GNUTLS */
889 if ( rc == -1 && lo->ldo_tls_ctx != NULL ) {
890 ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx );
891 lo->ldo_tls_ctx = NULL;
894 LDAP_FREE( ciphersuite );
895 LDAP_FREE( cacertfile );
896 LDAP_FREE( certfile );
897 LDAP_FREE( keyfile );
899 LDAP_FREE( crlfile );
901 LDAP_FREE( cacertdir );
909 * initialize the default context
912 ldap_pvt_tls_init_def_ctx( int is_server )
914 struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT();
916 #ifdef LDAP_R_COMPILE
917 ldap_pvt_thread_mutex_lock( &tls_def_ctx_mutex );
919 rc = ldap_int_tls_init_ctx( lo, is_server );
920 #ifdef LDAP_R_COMPILE
921 ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
927 alloc_handle( void *ctx_arg, int is_server )
935 struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT();
936 if ( ldap_pvt_tls_init_def_ctx( is_server ) < 0 ) return NULL;
937 ctx = lo->ldo_tls_ctx;
940 ssl = tls_session_new( ctx, is_server );
942 Debug( LDAP_DEBUG_ANY,"TLS: can't create ssl handle.\n",0,0,0);
949 update_flags( Sockbuf *sb, tls_session * ssl, int rc )
951 sb->sb_trans_needs_read = 0;
952 sb->sb_trans_needs_write = 0;
955 if ( rc != GNUTLS_E_INTERRUPTED && rc != GNUTLS_E_AGAIN )
958 switch (gnutls_record_get_direction (ssl->session)) {
960 sb->sb_trans_needs_read = 1;
963 sb->sb_trans_needs_write = 1;
966 #else /* !HAVE_GNUTLS */
967 rc = SSL_get_error(ssl, rc);
968 if (rc == SSL_ERROR_WANT_READ) {
969 sb->sb_trans_needs_read = 1;
972 } else if (rc == SSL_ERROR_WANT_WRITE) {
973 sb->sb_trans_needs_write = 1;
976 } else if (rc == SSL_ERROR_WANT_CONNECT) {
979 #endif /* HAVE_GNUTLS */
984 * TLS support for LBER Sockbufs
989 Sockbuf_IO_Desc *sbiod;
995 sb_gtls_recv( gnutls_transport_ptr_t ptr, void *buf, size_t len )
999 if ( buf == NULL || len <= 0 ) return 0;
1001 p = (struct tls_data *)ptr;
1003 if ( p == NULL || p->sbiod == NULL ) {
1007 return LBER_SBIOD_READ_NEXT( p->sbiod, buf, len );
1011 sb_gtls_send( gnutls_transport_ptr_t ptr, const void *buf, size_t len )
1015 if ( buf == NULL || len <= 0 ) return 0;
1017 p = (struct tls_data *)ptr;
1019 if ( p == NULL || p->sbiod == NULL ) {
1023 return LBER_SBIOD_WRITE_NEXT( p->sbiod, (char *)buf, len );
1027 sb_tls_setup( Sockbuf_IO_Desc *sbiod, void *arg )
1030 tls_session *session = arg;
1032 assert( sbiod != NULL );
1034 p = LBER_MALLOC( sizeof( *p ) );
1039 gnutls_transport_set_ptr( session->session, (gnutls_transport_ptr)p );
1040 gnutls_transport_set_pull_function( session->session, sb_gtls_recv );
1041 gnutls_transport_set_push_function( session->session, sb_gtls_send );
1044 sbiod->sbiod_pvt = p;
1049 sb_tls_remove( Sockbuf_IO_Desc *sbiod )
1053 assert( sbiod != NULL );
1054 assert( sbiod->sbiod_pvt != NULL );
1056 p = (struct tls_data *)sbiod->sbiod_pvt;
1057 gnutls_deinit ( p->ssl->session );
1058 LBER_FREE( p->ssl );
1059 LBER_FREE( sbiod->sbiod_pvt );
1060 sbiod->sbiod_pvt = NULL;
1065 sb_tls_close( Sockbuf_IO_Desc *sbiod )
1069 assert( sbiod != NULL );
1070 assert( sbiod->sbiod_pvt != NULL );
1072 p = (struct tls_data *)sbiod->sbiod_pvt;
1073 gnutls_bye ( p->ssl->session, GNUTLS_SHUT_RDWR );
1078 sb_tls_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
1082 assert( sbiod != NULL );
1083 assert( sbiod->sbiod_pvt != NULL );
1085 p = (struct tls_data *)sbiod->sbiod_pvt;
1087 if ( opt == LBER_SB_OPT_GET_SSL ) {
1088 *((tls_session **)arg) = p->ssl;
1091 } else if ( opt == LBER_SB_OPT_DATA_READY ) {
1092 if( gnutls_record_check_pending( p->ssl->session ) > 0 ) {
1097 return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
1101 sb_tls_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
1107 assert( sbiod != NULL );
1108 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
1110 p = (struct tls_data *)sbiod->sbiod_pvt;
1112 ret = gnutls_record_recv ( p->ssl->session, buf, len );
1114 case GNUTLS_E_INTERRUPTED:
1115 case GNUTLS_E_AGAIN:
1116 sbiod->sbiod_sb->sb_trans_needs_read = 1;
1117 sock_errset(EWOULDBLOCK);
1120 case GNUTLS_E_REHANDSHAKE:
1121 for ( ret = gnutls_handshake ( p->ssl->session );
1122 ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN;
1123 ret = gnutls_handshake ( p->ssl->session ) );
1124 sbiod->sbiod_sb->sb_trans_needs_read = 1;
1128 sbiod->sbiod_sb->sb_trans_needs_read = 0;
1134 sb_tls_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
1140 assert( sbiod != NULL );
1141 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
1143 p = (struct tls_data *)sbiod->sbiod_pvt;
1145 ret = gnutls_record_send ( p->ssl->session, (char *)buf, len );
1147 if ( ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN ) {
1148 sbiod->sbiod_sb->sb_trans_needs_write = 1;
1149 sock_errset(EWOULDBLOCK);
1152 sbiod->sbiod_sb->sb_trans_needs_write = 0;
1157 #else /* !HAVE_GNUTLS */
1160 sb_tls_bio_create( BIO *b ) {
1169 sb_tls_bio_destroy( BIO *b )
1171 if ( b == NULL ) return 0;
1173 b->ptr = NULL; /* sb_tls_remove() will free it */
1180 sb_tls_bio_read( BIO *b, char *buf, int len )
1185 if ( buf == NULL || len <= 0 ) return 0;
1187 p = (struct tls_data *)b->ptr;
1189 if ( p == NULL || p->sbiod == NULL ) {
1193 ret = LBER_SBIOD_READ_NEXT( p->sbiod, buf, len );
1195 BIO_clear_retry_flags( b );
1197 int err = sock_errno();
1198 if ( err == EAGAIN || err == EWOULDBLOCK ) {
1199 BIO_set_retry_read( b );
1207 sb_tls_bio_write( BIO *b, const char *buf, int len )
1212 if ( buf == NULL || len <= 0 ) return 0;
1214 p = (struct tls_data *)b->ptr;
1216 if ( p == NULL || p->sbiod == NULL ) {
1220 ret = LBER_SBIOD_WRITE_NEXT( p->sbiod, (char *)buf, len );
1222 BIO_clear_retry_flags( b );
1224 int err = sock_errno();
1225 if ( err == EAGAIN || err == EWOULDBLOCK ) {
1226 BIO_set_retry_write( b );
1234 sb_tls_bio_ctrl( BIO *b, int cmd, long num, void *ptr )
1236 if ( cmd == BIO_CTRL_FLUSH ) {
1237 /* The OpenSSL library needs this */
1244 sb_tls_bio_gets( BIO *b, char *buf, int len )
1250 sb_tls_bio_puts( BIO *b, const char *str )
1252 return sb_tls_bio_write( b, str, strlen( str ) );
1255 static BIO_METHOD sb_tls_bio_method =
1257 ( 100 | 0x400 ), /* it's a source/sink BIO */
1269 sb_tls_setup( Sockbuf_IO_Desc *sbiod, void *arg )
1274 assert( sbiod != NULL );
1276 p = LBER_MALLOC( sizeof( *p ) );
1281 p->ssl = (SSL *)arg;
1283 bio = BIO_new( &sb_tls_bio_method );
1284 bio->ptr = (void *)p;
1285 SSL_set_bio( p->ssl, bio, bio );
1286 sbiod->sbiod_pvt = p;
1291 sb_tls_remove( Sockbuf_IO_Desc *sbiod )
1295 assert( sbiod != NULL );
1296 assert( sbiod->sbiod_pvt != NULL );
1298 p = (struct tls_data *)sbiod->sbiod_pvt;
1300 LBER_FREE( sbiod->sbiod_pvt );
1301 sbiod->sbiod_pvt = NULL;
1306 sb_tls_close( Sockbuf_IO_Desc *sbiod )
1310 assert( sbiod != NULL );
1311 assert( sbiod->sbiod_pvt != NULL );
1313 p = (struct tls_data *)sbiod->sbiod_pvt;
1314 SSL_shutdown( p->ssl );
1319 sb_tls_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
1323 assert( sbiod != NULL );
1324 assert( sbiod->sbiod_pvt != NULL );
1326 p = (struct tls_data *)sbiod->sbiod_pvt;
1328 if ( opt == LBER_SB_OPT_GET_SSL ) {
1329 *((SSL **)arg) = p->ssl;
1332 } else if ( opt == LBER_SB_OPT_DATA_READY ) {
1333 if( SSL_pending( p->ssl ) > 0 ) {
1338 return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
1342 sb_tls_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
1348 assert( sbiod != NULL );
1349 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
1351 p = (struct tls_data *)sbiod->sbiod_pvt;
1353 ret = SSL_read( p->ssl, (char *)buf, len );
1355 errno = WSAGetLastError();
1357 err = SSL_get_error( p->ssl, ret );
1358 if (err == SSL_ERROR_WANT_READ ) {
1359 sbiod->sbiod_sb->sb_trans_needs_read = 1;
1360 sock_errset(EWOULDBLOCK);
1363 sbiod->sbiod_sb->sb_trans_needs_read = 0;
1368 sb_tls_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
1374 assert( sbiod != NULL );
1375 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
1377 p = (struct tls_data *)sbiod->sbiod_pvt;
1379 ret = SSL_write( p->ssl, (char *)buf, len );
1381 errno = WSAGetLastError();
1383 err = SSL_get_error( p->ssl, ret );
1384 if (err == SSL_ERROR_WANT_WRITE ) {
1385 sbiod->sbiod_sb->sb_trans_needs_write = 1;
1386 sock_errset(EWOULDBLOCK);
1389 sbiod->sbiod_sb->sb_trans_needs_write = 0;
1396 static Sockbuf_IO sb_tls_sbio =
1398 sb_tls_setup, /* sbi_setup */
1399 sb_tls_remove, /* sbi_remove */
1400 sb_tls_ctrl, /* sbi_ctrl */
1401 sb_tls_read, /* sbi_read */
1402 sb_tls_write, /* sbi_write */
1403 sb_tls_close /* sbi_close */
1407 /* Certs are not automatically varified during the handshake */
1409 tls_cert_verify( tls_session *ssl )
1411 unsigned int status = 0;
1413 time_t now = time(0);
1415 err = gnutls_certificate_verify_peers2( ssl->session, &status );
1417 Debug( LDAP_DEBUG_ANY,"TLS: gnutls_certificate_verify_peers2 failed %d\n",
1422 Debug( LDAP_DEBUG_TRACE,"TLS: peer cert untrusted or revoked (0x%x)\n",
1426 if ( gnutls_certificate_expiration_time_peers( ssl->session ) < now ) {
1427 Debug( LDAP_DEBUG_ANY, "TLS: peer certificate is expired\n",
1431 if ( gnutls_certificate_activation_time_peers( ssl->session ) > now ) {
1432 Debug( LDAP_DEBUG_ANY, "TLS: peer certificate not yet active\n",
1438 #endif /* HAVE_GNUTLS */
1441 * Call this to do a TLS connect on a sockbuf. ctx_arg can be
1442 * a SSL_CTX * or NULL, in which case the default ctx is used.
1446 * 0 - Success. Connection is ready for communication.
1447 * <0 - Error. Can't create a TLS stream.
1448 * >0 - Partial success.
1449 * Do a select (using information from lber_pvt_sb_needs_{read,write}
1454 ldap_int_tls_connect( LDAP *ld, LDAPConn *conn )
1456 Sockbuf *sb = conn->lconn_sb;
1460 if ( HAS_TLS( sb ) ) {
1461 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
1464 struct ldapoptions *lo;
1467 ctx = ld->ld_options.ldo_tls_ctx;
1469 ssl = alloc_handle( ctx, 0 );
1471 if ( ssl == NULL ) return -1;
1474 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
1475 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
1477 ber_sockbuf_add_io( sb, &sb_tls_sbio,
1478 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
1480 lo = LDAP_INT_GLOBAL_OPT();
1482 ctx = lo->ldo_tls_ctx;
1483 ld->ld_options.ldo_tls_ctx = ctx;
1486 if ( ld->ld_options.ldo_tls_connect_cb )
1487 ld->ld_options.ldo_tls_connect_cb( ld, ssl, ctx,
1488 ld->ld_options.ldo_tls_connect_arg );
1489 if ( lo && lo->ldo_tls_connect_cb && lo->ldo_tls_connect_cb !=
1490 ld->ld_options.ldo_tls_connect_cb )
1491 lo->ldo_tls_connect_cb( ld, ssl, ctx, lo->ldo_tls_connect_arg );
1494 err = tls_session_connect( ssl );
1497 errno = WSAGetLastError();
1506 if ( update_flags( sb, ssl, err )) {
1511 if ((err = ERR_peek_error()))
1514 if ( ld->ld_error ) {
1515 LDAP_FREE( ld->ld_error );
1518 ld->ld_error = LDAP_STRDUP(gnutls_strerror( err ));
1522 ld->ld_error = LDAP_STRDUP(ERR_error_string(err, buf));
1526 if ( ld->ld_error ) __etoa(ld->ld_error);
1530 Debug( LDAP_DEBUG_ANY,"TLS: can't connect: %s.\n",
1531 ld->ld_error ? ld->ld_error : "" ,0,0);
1533 ber_sockbuf_remove_io( sb, &sb_tls_sbio,
1534 LBER_SBIOD_LEVEL_TRANSPORT );
1536 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
1537 LBER_SBIOD_LEVEL_TRANSPORT );
1543 if ( ld->ld_options.ldo_tls_require_cert != LDAP_OPT_X_TLS_NEVER ) {
1544 err = tls_cert_verify( ssl );
1545 if ( err && ld->ld_options.ldo_tls_require_cert != LDAP_OPT_X_TLS_ALLOW )
1554 * Call this to do a TLS accept on a sockbuf.
1555 * Everything else is the same as with tls_connect.
1558 ldap_pvt_tls_accept( Sockbuf *sb, void *ctx_arg )
1563 if ( HAS_TLS( sb ) ) {
1564 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
1567 ssl = alloc_handle( ctx_arg, 1 );
1568 if ( ssl == NULL ) return -1;
1571 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
1572 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
1574 ber_sockbuf_add_io( sb, &sb_tls_sbio,
1575 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
1578 err = tls_session_accept( ssl );
1581 errno = WSAGetLastError();
1590 if ( update_flags( sb, ssl, err )) return 1;
1593 Debug( LDAP_DEBUG_ANY,"TLS: can't accept: %s.\n",
1594 gnutls_strerror( err ),0,0 );
1596 Debug( LDAP_DEBUG_ANY,"TLS: can't accept.\n",0,0,0 );
1599 ber_sockbuf_remove_io( sb, &sb_tls_sbio,
1600 LBER_SBIOD_LEVEL_TRANSPORT );
1602 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
1603 LBER_SBIOD_LEVEL_TRANSPORT );
1609 if ( ssl->ctx->lo->ldo_tls_require_cert != LDAP_OPT_X_TLS_NEVER ) {
1610 err = tls_cert_verify( ssl );
1611 if ( err && ssl->ctx->lo->ldo_tls_require_cert != LDAP_OPT_X_TLS_ALLOW )
1619 ldap_pvt_tls_inplace ( Sockbuf *sb )
1621 return HAS_TLS( sb ) ? 1 : 0;
1625 ldap_tls_inplace( LDAP *ld )
1629 if ( ld->ld_defconn && ld->ld_defconn->lconn_sb ) {
1630 sb = ld->ld_defconn->lconn_sb;
1632 } else if ( ld->ld_sb ) {
1639 return ldap_pvt_tls_inplace( sb );
1643 x509_cert_get_dn( struct berval *cert, struct berval *dn, int get_subject )
1645 BerElementBuffer berbuf;
1646 BerElement *ber = (BerElement *)&berbuf;
1651 ber_init2( ber, cert, LBER_USE_DER );
1652 tag = ber_skip_tag( ber, &len ); /* Sequence */
1653 tag = ber_skip_tag( ber, &len ); /* Sequence */
1654 tag = ber_skip_tag( ber, &len ); /* Context + Constructed (version) */
1655 if ( tag == 0xa0 ) /* Version is optional */
1656 tag = ber_get_int( ber, &i ); /* Int: Version */
1657 tag = ber_get_int( ber, &i ); /* Int: Serial */
1658 tag = ber_skip_tag( ber, &len ); /* Sequence: Signature */
1659 ber_skip_data( ber, len );
1660 if ( !get_subject ) {
1661 tag = ber_peek_tag( ber, &len ); /* Sequence: Issuer DN */
1663 tag = ber_skip_tag( ber, &len );
1664 ber_skip_data( ber, len );
1665 tag = ber_skip_tag( ber, &len ); /* Sequence: Validity */
1666 ber_skip_data( ber, len );
1667 tag = ber_peek_tag( ber, &len ); /* Sequence: Subject DN */
1669 len = ber_ptrlen( ber );
1670 dn->bv_val = cert->bv_val + len;
1671 dn->bv_len = cert->bv_len - len;
1676 tls_get_cert_dn( tls_session *session, struct berval *dnbv )
1678 if ( !session->peer_der_dn.bv_val ) {
1679 const gnutls_datum_t *peer_cert_list;
1683 peer_cert_list = gnutls_certificate_get_peers( session->session,
1685 if ( !peer_cert_list ) return LDAP_INVALID_CREDENTIALS;
1687 bv.bv_len = peer_cert_list->size;
1688 bv.bv_val = peer_cert_list->data;
1690 x509_cert_get_dn( &bv, &session->peer_der_dn, 1 );
1691 *dnbv = session->peer_der_dn;
1697 tls_get_cert( SSL *s )
1699 /* If peer cert was bad, treat as if no cert was given */
1700 if (SSL_get_verify_result(s)) {
1701 /* If we can send an alert, do so */
1702 if (SSL_version(s) != SSL2_VERSION) {
1703 ssl3_send_alert(s,SSL3_AL_WARNING,SSL3_AD_BAD_CERTIFICATE);
1707 return SSL_get_peer_certificate(s);
1711 tls_get_cert_dn( tls_session *session, struct berval *dnbv )
1714 X509 *x = tls_get_cert( session );
1718 return LDAP_INVALID_CREDENTIALS;
1720 xn = X509_get_subject_name(x);
1721 dnbv->bv_len = i2d_X509_NAME( xn, NULL );
1722 dnbv->bv_val = xn->bytes->data;
1725 #endif /* HAVE_GNUTLS */
1728 ldap_pvt_tls_get_peer_dn( void *s, struct berval *dn,
1729 LDAPDN_rewrite_dummy *func, unsigned flags )
1731 tls_session *session = s;
1735 rc = tls_get_cert_dn( session, &bvdn );
1736 if ( rc ) return rc;
1738 rc = ldap_X509dn2bv( &bvdn, dn,
1739 (LDAPDN_rewrite_func *)func, flags);
1743 /* what kind of hostname were we given? */
1751 ldap_pvt_tls_check_hostname( LDAP *ld, void *s, const char *name_in )
1753 tls_session *session = s;
1755 const gnutls_datum_t *peer_cert_list;
1758 char altname[NI_MAXHOST];
1761 gnutls_x509_crt_t cert;
1765 char *domain = NULL;
1766 #ifdef LDAP_PF_INET6
1767 struct in6_addr addr;
1769 struct in_addr addr;
1771 int n, len1 = 0, len2 = 0;
1773 time_t now = time(0);
1775 if( ldap_int_hostname &&
1776 ( !name_in || !strcasecmp( name_in, "localhost" ) ) )
1778 name = ldap_int_hostname;
1783 peer_cert_list = gnutls_certificate_get_peers( session->session,
1785 if ( !peer_cert_list ) {
1786 Debug( LDAP_DEBUG_ANY,
1787 "TLS: unable to get peer certificate.\n",
1789 /* If this was a fatal condition, things would have
1790 * aborted long before now.
1792 return LDAP_SUCCESS;
1794 ret = gnutls_x509_crt_init( &cert );
1796 return LDAP_LOCAL_ERROR;
1797 ret = gnutls_x509_crt_import( cert, peer_cert_list, GNUTLS_X509_FMT_DER );
1799 gnutls_x509_crt_deinit( cert );
1800 return LDAP_LOCAL_ERROR;
1803 #ifdef LDAP_PF_INET6
1804 if (name[0] == '[' && strchr(name, ']')) {
1805 char *n2 = ldap_strdup(name+1);
1806 *strchr(n2, ']') = 2;
1807 if (inet_pton(AF_INET6, n2, &addr))
1812 if ((ptr = strrchr(name, '.')) && isdigit((unsigned char)ptr[1])) {
1813 if (inet_aton(name, (struct in_addr *)&addr)) ntype = IS_IP4;
1816 if (ntype == IS_DNS) {
1817 len1 = strlen(name);
1818 domain = strchr(name, '.');
1820 len2 = len1 - (domain-name);
1824 for ( i=0, ret=0; ret >= 0; i++ ) {
1825 altnamesize = sizeof(altname);
1826 ret = gnutls_x509_crt_get_subject_alt_name( cert, i,
1827 altname, &altnamesize, NULL );
1828 if ( ret < 0 ) break;
1831 if ( altnamesize == 0 ) continue;
1833 if ( ret == GNUTLS_SAN_DNSNAME ) {
1834 if (ntype != IS_DNS) continue;
1836 /* Is this an exact match? */
1837 if ((len1 == altnamesize) && !strncasecmp(name, altname, len1)) {
1841 /* Is this a wildcard match? */
1842 if (domain && (altname[0] == '*') && (altname[1] == '.') &&
1843 (len2 == altnamesize-1) && !strncasecmp(domain, &altname[1], len2))
1847 } else if ( ret == GNUTLS_SAN_IPADDRESS ) {
1848 if (ntype == IS_DNS) continue;
1850 #ifdef LDAP_PF_INET6
1851 if (ntype == IS_IP6 && altnamesize != sizeof(struct in6_addr)) {
1855 if (ntype == IS_IP4 && altnamesize != sizeof(struct in_addr)) {
1858 if (!memcmp(altname, &addr, altnamesize)) {
1866 altnamesize = sizeof(altname);
1867 ret = gnutls_x509_crt_get_dn_by_oid( cert, CN_OID,
1868 0, 0, altname, &altnamesize );
1870 Debug( LDAP_DEBUG_ANY,
1871 "TLS: unable to get common name from peer certificate.\n",
1873 ret = LDAP_CONNECT_ERROR;
1874 if ( ld->ld_error ) {
1875 LDAP_FREE( ld->ld_error );
1877 ld->ld_error = LDAP_STRDUP(
1878 _("TLS: unable to get CN from peer certificate"));
1881 ret = LDAP_LOCAL_ERROR;
1882 if ( len1 == altnamesize && strncasecmp(name, altname, altnamesize) == 0 ) {
1885 } else if (( altname[0] == '*' ) && ( altname[1] == '.' )) {
1886 /* Is this a wildcard match? */
1888 (len2 == altnamesize-1) && !strncasecmp(domain, &altname[1], len2)) {
1894 if( ret == LDAP_LOCAL_ERROR ) {
1895 altname[altnamesize] = '\0';
1896 Debug( LDAP_DEBUG_ANY, "TLS: hostname (%s) does not match "
1897 "common name in certificate (%s).\n",
1899 ret = LDAP_CONNECT_ERROR;
1900 if ( ld->ld_error ) {
1901 LDAP_FREE( ld->ld_error );
1903 ld->ld_error = LDAP_STRDUP(
1904 _("TLS: hostname does not match CN in peer certificate"));
1907 gnutls_x509_crt_deinit( cert );
1911 #else /* !HAVE_GNUTLS */
1914 ldap_pvt_tls_check_hostname( LDAP *ld, void *s, const char *name_in )
1916 int i, ret = LDAP_LOCAL_ERROR;
1921 #ifdef LDAP_PF_INET6
1922 struct in6_addr addr;
1924 struct in_addr addr;
1927 if( ldap_int_hostname &&
1928 ( !name_in || !strcasecmp( name_in, "localhost" ) ) )
1930 name = ldap_int_hostname;
1935 x = tls_get_cert((SSL *)s);
1937 Debug( LDAP_DEBUG_ANY,
1938 "TLS: unable to get peer certificate.\n",
1940 /* If this was a fatal condition, things would have
1941 * aborted long before now.
1943 return LDAP_SUCCESS;
1946 #ifdef LDAP_PF_INET6
1947 if (name[0] == '[' && strchr(name, ']')) {
1948 char *n2 = ldap_strdup(name+1);
1949 *strchr(n2, ']') = 2;
1950 if (inet_pton(AF_INET6, n2, &addr))
1955 if ((ptr = strrchr(name, '.')) && isdigit((unsigned char)ptr[1])) {
1956 if (inet_aton(name, (struct in_addr *)&addr)) ntype = IS_IP4;
1959 i = X509_get_ext_by_NID(x, NID_subject_alt_name, -1);
1962 STACK_OF(GENERAL_NAME) *alt;
1964 ex = X509_get_ext(x, i);
1965 alt = X509V3_EXT_d2i(ex);
1967 int n, len1 = 0, len2 = 0;
1968 char *domain = NULL;
1971 if (ntype == IS_DNS) {
1972 len1 = strlen(name);
1973 domain = strchr(name, '.');
1975 len2 = len1 - (domain-name);
1978 n = sk_GENERAL_NAME_num(alt);
1979 for (i=0; i<n; i++) {
1982 gn = sk_GENERAL_NAME_value(alt, i);
1983 if (gn->type == GEN_DNS) {
1984 if (ntype != IS_DNS) continue;
1986 sn = (char *) ASN1_STRING_data(gn->d.ia5);
1987 sl = ASN1_STRING_length(gn->d.ia5);
1990 if (sl == 0) continue;
1992 /* Is this an exact match? */
1993 if ((len1 == sl) && !strncasecmp(name, sn, len1)) {
1997 /* Is this a wildcard match? */
1998 if (domain && (sn[0] == '*') && (sn[1] == '.') &&
1999 (len2 == sl-1) && !strncasecmp(domain, &sn[1], len2))
2004 } else if (gn->type == GEN_IPADD) {
2005 if (ntype == IS_DNS) continue;
2007 sn = (char *) ASN1_STRING_data(gn->d.ia5);
2008 sl = ASN1_STRING_length(gn->d.ia5);
2010 #ifdef LDAP_PF_INET6
2011 if (ntype == IS_IP6 && sl != sizeof(struct in6_addr)) {
2015 if (ntype == IS_IP4 && sl != sizeof(struct in_addr)) {
2018 if (!memcmp(sn, &addr, sl)) {
2024 GENERAL_NAMES_free(alt);
2025 if (i < n) { /* Found a match */
2031 if (ret != LDAP_SUCCESS) {
2036 xn = X509_get_subject_name(x);
2037 if( X509_NAME_get_text_by_NID( xn, NID_commonName,
2038 buf, sizeof(buf)) == -1)
2040 Debug( LDAP_DEBUG_ANY,
2041 "TLS: unable to get common name from peer certificate.\n",
2043 ret = LDAP_CONNECT_ERROR;
2044 if ( ld->ld_error ) {
2045 LDAP_FREE( ld->ld_error );
2047 ld->ld_error = LDAP_STRDUP(
2048 _("TLS: unable to get CN from peer certificate"));
2050 } else if (strcasecmp(name, buf) == 0 ) {
2053 } else if (( buf[0] == '*' ) && ( buf[1] == '.' )) {
2054 char *domain = strchr(name, '.');
2060 dlen = sl - (domain-name);
2063 /* Is this a wildcard match? */
2064 if ((dlen == sl-1) && !strncasecmp(domain, &buf[1], dlen)) {
2070 if( ret == LDAP_LOCAL_ERROR ) {
2071 Debug( LDAP_DEBUG_ANY, "TLS: hostname (%s) does not match "
2072 "common name in certificate (%s).\n",
2074 ret = LDAP_CONNECT_ERROR;
2075 if ( ld->ld_error ) {
2076 LDAP_FREE( ld->ld_error );
2078 ld->ld_error = LDAP_STRDUP(
2079 _("TLS: hostname does not match CN in peer certificate"));
2088 ldap_int_tls_config( LDAP *ld, int option, const char *arg )
2093 case LDAP_OPT_X_TLS_CACERTFILE:
2094 case LDAP_OPT_X_TLS_CACERTDIR:
2095 case LDAP_OPT_X_TLS_CERTFILE:
2096 case LDAP_OPT_X_TLS_KEYFILE:
2097 case LDAP_OPT_X_TLS_RANDOM_FILE:
2098 case LDAP_OPT_X_TLS_CIPHER_SUITE:
2099 case LDAP_OPT_X_TLS_DHFILE:
2101 case LDAP_OPT_X_TLS_CRLFILE:
2103 return ldap_pvt_tls_set_option( ld, option, (void *) arg );
2105 case LDAP_OPT_X_TLS_REQUIRE_CERT:
2106 case LDAP_OPT_X_TLS:
2108 if ( strcasecmp( arg, "never" ) == 0 ) {
2109 i = LDAP_OPT_X_TLS_NEVER ;
2111 } else if ( strcasecmp( arg, "demand" ) == 0 ) {
2112 i = LDAP_OPT_X_TLS_DEMAND ;
2114 } else if ( strcasecmp( arg, "allow" ) == 0 ) {
2115 i = LDAP_OPT_X_TLS_ALLOW ;
2117 } else if ( strcasecmp( arg, "try" ) == 0 ) {
2118 i = LDAP_OPT_X_TLS_TRY ;
2120 } else if ( ( strcasecmp( arg, "hard" ) == 0 ) ||
2121 ( strcasecmp( arg, "on" ) == 0 ) ||
2122 ( strcasecmp( arg, "yes" ) == 0) ||
2123 ( strcasecmp( arg, "true" ) == 0 ) )
2125 i = LDAP_OPT_X_TLS_HARD ;
2129 return ldap_pvt_tls_set_option( ld, option, &i );
2132 #ifdef HAVE_OPENSSL_CRL
2133 case LDAP_OPT_X_TLS_CRLCHECK:
2135 if ( strcasecmp( arg, "none" ) == 0 ) {
2136 i = LDAP_OPT_X_TLS_CRL_NONE ;
2137 } else if ( strcasecmp( arg, "peer" ) == 0 ) {
2138 i = LDAP_OPT_X_TLS_CRL_PEER ;
2139 } else if ( strcasecmp( arg, "all" ) == 0 ) {
2140 i = LDAP_OPT_X_TLS_CRL_ALL ;
2143 return ldap_pvt_tls_set_option( ld, option, &i );
2152 ldap_pvt_tls_get_option( LDAP *ld, int option, void *arg )
2154 struct ldapoptions *lo;
2157 assert( LDAP_VALID( ld ) );
2159 if( !LDAP_VALID( ld ) ) {
2160 return LDAP_OPT_ERROR;
2163 lo = &ld->ld_options;
2166 /* Get pointer to global option structure */
2167 lo = LDAP_INT_GLOBAL_OPT();
2169 return LDAP_NO_MEMORY;
2174 case LDAP_OPT_X_TLS:
2175 *(int *)arg = lo->ldo_tls_mode;
2177 case LDAP_OPT_X_TLS_CTX:
2178 *(void **)arg = lo->ldo_tls_ctx;
2179 if ( lo->ldo_tls_ctx ) {
2180 tls_ctx_ref( lo->ldo_tls_ctx );
2183 case LDAP_OPT_X_TLS_CACERTFILE:
2184 *(char **)arg = lo->ldo_tls_cacertfile ?
2185 LDAP_STRDUP( lo->ldo_tls_cacertfile ) : NULL;
2187 case LDAP_OPT_X_TLS_CACERTDIR:
2188 *(char **)arg = lo->ldo_tls_cacertdir ?
2189 LDAP_STRDUP( lo->ldo_tls_cacertdir ) : NULL;
2191 case LDAP_OPT_X_TLS_CERTFILE:
2192 *(char **)arg = lo->ldo_tls_certfile ?
2193 LDAP_STRDUP( lo->ldo_tls_certfile ) : NULL;
2195 case LDAP_OPT_X_TLS_KEYFILE:
2196 *(char **)arg = lo->ldo_tls_keyfile ?
2197 LDAP_STRDUP( lo->ldo_tls_keyfile ) : NULL;
2199 case LDAP_OPT_X_TLS_DHFILE:
2200 *(char **)arg = lo->ldo_tls_dhfile ?
2201 LDAP_STRDUP( lo->ldo_tls_dhfile ) : NULL;
2204 case LDAP_OPT_X_TLS_CRLFILE:
2205 *(char **)arg = lo->ldo_tls_crlfile ?
2206 LDAP_STRDUP( lo->ldo_tls_crlfile ) : NULL;
2209 case LDAP_OPT_X_TLS_REQUIRE_CERT:
2210 *(int *)arg = lo->ldo_tls_require_cert;
2212 #ifdef HAVE_OPENSSL_CRL
2213 case LDAP_OPT_X_TLS_CRLCHECK:
2214 *(int *)arg = lo->ldo_tls_crlcheck;
2217 case LDAP_OPT_X_TLS_CIPHER_SUITE:
2218 *(char **)arg = lo->ldo_tls_ciphersuite ?
2219 LDAP_STRDUP( lo->ldo_tls_ciphersuite ) : NULL;
2221 case LDAP_OPT_X_TLS_RANDOM_FILE:
2223 *(char **)arg = tls_opt_randfile ?
2224 LDAP_STRDUP( tls_opt_randfile ) : NULL;
2226 *(char **)arg = NULL;
2229 case LDAP_OPT_X_TLS_SSL_CTX: {
2232 LDAPConn *conn = ld->ld_defconn;
2233 if ( conn != NULL ) {
2234 Sockbuf *sb = conn->lconn_sb;
2235 retval = ldap_pvt_tls_sb_ctx( sb );
2238 *(void **)arg = retval;
2241 case LDAP_OPT_X_TLS_CONNECT_CB:
2242 *(LDAP_TLS_CONNECT_CB **)arg = lo->ldo_tls_connect_cb;
2244 case LDAP_OPT_X_TLS_CONNECT_ARG:
2245 *(void **)arg = lo->ldo_tls_connect_arg;
2254 ldap_pvt_tls_set_option( LDAP *ld, int option, void *arg )
2256 struct ldapoptions *lo;
2259 assert( LDAP_VALID( ld ) );
2261 if( !LDAP_VALID( ld ) ) {
2262 return LDAP_OPT_ERROR;
2265 lo = &ld->ld_options;
2268 /* Get pointer to global option structure */
2269 lo = LDAP_INT_GLOBAL_OPT();
2271 return LDAP_NO_MEMORY;
2276 case LDAP_OPT_X_TLS:
2277 if ( !arg ) return -1;
2279 switch( *(int *) arg ) {
2280 case LDAP_OPT_X_TLS_NEVER:
2281 case LDAP_OPT_X_TLS_DEMAND:
2282 case LDAP_OPT_X_TLS_ALLOW:
2283 case LDAP_OPT_X_TLS_TRY:
2284 case LDAP_OPT_X_TLS_HARD:
2286 lo->ldo_tls_mode = *(int *)arg;
2293 case LDAP_OPT_X_TLS_CTX:
2294 if ( lo->ldo_tls_ctx )
2295 ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx );
2296 lo->ldo_tls_ctx = arg;
2297 tls_ctx_ref( lo->ldo_tls_ctx );
2299 case LDAP_OPT_X_TLS_CONNECT_CB:
2300 lo->ldo_tls_connect_cb = (LDAP_TLS_CONNECT_CB *)arg;
2302 case LDAP_OPT_X_TLS_CONNECT_ARG:
2303 lo->ldo_tls_connect_arg = arg;
2305 case LDAP_OPT_X_TLS_CACERTFILE:
2306 if ( lo->ldo_tls_cacertfile ) LDAP_FREE( lo->ldo_tls_cacertfile );
2307 lo->ldo_tls_cacertfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
2309 case LDAP_OPT_X_TLS_CACERTDIR:
2310 if ( lo->ldo_tls_cacertdir ) LDAP_FREE( lo->ldo_tls_cacertdir );
2311 lo->ldo_tls_cacertdir = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
2313 case LDAP_OPT_X_TLS_CERTFILE:
2314 if ( lo->ldo_tls_certfile ) LDAP_FREE( lo->ldo_tls_certfile );
2315 lo->ldo_tls_certfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
2317 case LDAP_OPT_X_TLS_KEYFILE:
2318 if ( lo->ldo_tls_keyfile ) LDAP_FREE( lo->ldo_tls_keyfile );
2319 lo->ldo_tls_keyfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
2321 case LDAP_OPT_X_TLS_DHFILE:
2322 if ( lo->ldo_tls_dhfile ) LDAP_FREE( lo->ldo_tls_dhfile );
2323 lo->ldo_tls_dhfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
2326 case LDAP_OPT_X_TLS_CRLFILE:
2327 if ( lo->ldo_tls_crlfile ) LDAP_FREE( lo->ldo_tls_crlfile );
2328 lo->ldo_tls_crlfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
2331 case LDAP_OPT_X_TLS_REQUIRE_CERT:
2332 if ( !arg ) return -1;
2333 switch( *(int *) arg ) {
2334 case LDAP_OPT_X_TLS_NEVER:
2335 case LDAP_OPT_X_TLS_DEMAND:
2336 case LDAP_OPT_X_TLS_ALLOW:
2337 case LDAP_OPT_X_TLS_TRY:
2338 case LDAP_OPT_X_TLS_HARD:
2339 lo->ldo_tls_require_cert = * (int *) arg;
2343 #ifdef HAVE_OPENSSL_CRL
2344 case LDAP_OPT_X_TLS_CRLCHECK:
2345 if ( !arg ) return -1;
2346 switch( *(int *) arg ) {
2347 case LDAP_OPT_X_TLS_CRL_NONE:
2348 case LDAP_OPT_X_TLS_CRL_PEER:
2349 case LDAP_OPT_X_TLS_CRL_ALL:
2350 lo->ldo_tls_crlcheck = * (int *) arg;
2355 case LDAP_OPT_X_TLS_CIPHER_SUITE:
2356 if ( lo->ldo_tls_ciphersuite ) LDAP_FREE( lo->ldo_tls_ciphersuite );
2357 lo->ldo_tls_ciphersuite = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
2360 case LDAP_OPT_X_TLS_RANDOM_FILE:
2364 if (tls_opt_randfile ) LDAP_FREE (tls_opt_randfile );
2365 tls_opt_randfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
2369 case LDAP_OPT_X_TLS_NEWCTX:
2370 if ( !arg ) return -1;
2371 if ( lo->ldo_tls_ctx )
2372 ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx );
2373 lo->ldo_tls_ctx = NULL;
2374 return ldap_int_tls_init_ctx( lo, *(int *)arg );
2382 ldap_int_tls_start ( LDAP *ld, LDAPConn *conn, LDAPURLDesc *srv )
2384 Sockbuf *sb = conn->lconn_sb;
2389 host = srv->lud_host;
2391 host = conn->lconn_server->lud_host;
2394 /* avoid NULL host */
2395 if( host == NULL ) {
2399 (void) ldap_pvt_tls_init();
2402 * Fortunately, the lib uses blocking io...
2404 if ( ldap_int_tls_connect( ld, conn ) < 0 ) {
2405 ld->ld_errno = LDAP_CONNECT_ERROR;
2406 return (ld->ld_errno);
2409 ssl = ldap_pvt_tls_sb_ctx( sb );
2410 assert( ssl != NULL );
2413 * compare host with name(s) in certificate
2415 if (ld->ld_options.ldo_tls_require_cert != LDAP_OPT_X_TLS_NEVER) {
2416 ld->ld_errno = ldap_pvt_tls_check_hostname( ld, ssl, host );
2417 if (ld->ld_errno != LDAP_SUCCESS) {
2418 return ld->ld_errno;
2422 return LDAP_SUCCESS;
2426 /* Derived from openssl/apps/s_cb.c */
2428 tls_info_cb( const SSL *ssl, int where, int ret )
2432 char *state = (char *) SSL_state_string_long( (SSL *)ssl );
2434 w = where & ~SSL_ST_MASK;
2435 if ( w & SSL_ST_CONNECT ) {
2437 } else if ( w & SSL_ST_ACCEPT ) {
2445 state = LDAP_STRDUP( state );
2449 if ( where & SSL_CB_LOOP ) {
2450 Debug( LDAP_DEBUG_TRACE,
2451 "TLS trace: %s:%s\n",
2454 } else if ( where & SSL_CB_ALERT ) {
2455 char *atype = (char *) SSL_alert_type_string_long( ret );
2456 char *adesc = (char *) SSL_alert_desc_string_long( ret );
2457 op = ( where & SSL_CB_READ ) ? "read" : "write";
2460 atype = LDAP_STRDUP( atype );
2464 adesc = LDAP_STRDUP( adesc );
2468 Debug( LDAP_DEBUG_TRACE,
2469 "TLS trace: SSL3 alert %s:%s:%s\n",
2472 if ( atype ) LDAP_FREE( atype );
2473 if ( adesc ) LDAP_FREE( adesc );
2475 } else if ( where & SSL_CB_EXIT ) {
2477 Debug( LDAP_DEBUG_TRACE,
2478 "TLS trace: %s:failed in %s\n",
2480 } else if ( ret < 0 ) {
2481 Debug( LDAP_DEBUG_TRACE,
2482 "TLS trace: %s:error in %s\n",
2487 if ( state ) LDAP_FREE( state );
2492 tls_verify_cb( int ok, X509_STORE_CTX *ctx )
2501 char *certerr = NULL;
2503 cert = X509_STORE_CTX_get_current_cert( ctx );
2504 errnum = X509_STORE_CTX_get_error( ctx );
2505 errdepth = X509_STORE_CTX_get_error_depth( ctx );
2508 * X509_get_*_name return pointers to the internal copies of
2509 * those things requested. So do not free them.
2511 subject = X509_get_subject_name( cert );
2512 issuer = X509_get_issuer_name( cert );
2513 /* X509_NAME_oneline, if passed a NULL buf, allocate memomry */
2514 sname = X509_NAME_oneline( subject, NULL, 0 );
2515 iname = X509_NAME_oneline( issuer, NULL, 0 );
2516 if ( !ok ) certerr = (char *)X509_verify_cert_error_string( errnum );
2518 if ( sname ) __etoa( sname );
2519 if ( iname ) __etoa( iname );
2521 certerr = LDAP_STRDUP( certerr );
2525 Debug( LDAP_DEBUG_TRACE,
2526 "TLS certificate verification: depth: %d, err: %d, subject: %s,",
2528 sname ? sname : "-unknown-" );
2529 Debug( LDAP_DEBUG_TRACE, " issuer: %s\n", iname ? iname : "-unknown-", 0, 0 );
2531 Debug( LDAP_DEBUG_ANY,
2532 "TLS certificate verification: Error, %s\n",
2536 CRYPTO_free ( sname );
2538 CRYPTO_free ( iname );
2540 if ( certerr ) LDAP_FREE( certerr );
2546 tls_verify_ok( int ok, X509_STORE_CTX *ctx )
2548 (void) tls_verify_cb( ok, ctx );
2552 /* Inspired by ERR_print_errors in OpenSSL */
2554 tls_report_error( void )
2561 while ( ( l = ERR_get_error_line( &file, &line ) ) != 0 ) {
2562 ERR_error_string_n( l, buf, sizeof( buf ) );
2565 file = LDAP_STRDUP( file );
2566 __etoa( (char *)file );
2570 Debug( LDAP_DEBUG_ANY, "TLS: %s %s:%d\n",
2573 if ( file ) LDAP_FREE( (void *)file );
2579 tls_tmp_rsa_cb( SSL *ssl, int is_export, int key_length )
2583 /* FIXME: Pregenerate the key on startup */
2584 /* FIXME: Who frees the key? */
2585 tmp_rsa = RSA_generate_key( key_length, RSA_F4, NULL, NULL );
2588 Debug( LDAP_DEBUG_ANY,
2589 "TLS: Failed to generate temporary %d-bit %s RSA key\n",
2590 key_length, is_export ? "export" : "domestic", 0 );
2597 tls_seed_PRNG( const char *randfile )
2599 #ifndef URANDOM_DEVICE
2600 /* no /dev/urandom (or equiv) */
2602 char buffer[MAXPATHLEN];
2604 if (randfile == NULL) {
2605 /* The seed file is $RANDFILE if defined, otherwise $HOME/.rnd.
2606 * If $HOME is not set or buffer too small to hold the pathname,
2607 * an error occurs. - From RAND_file_name() man page.
2608 * The fact is that when $HOME is NULL, .rnd is used.
2610 randfile = RAND_file_name( buffer, sizeof( buffer ) );
2612 } else if (RAND_egd(randfile) > 0) {
2617 if (randfile == NULL) {
2618 Debug( LDAP_DEBUG_ANY,
2619 "TLS: Use configuration file or $RANDFILE to define seed PRNG\n",
2624 total = RAND_load_file(randfile, -1);
2626 if (RAND_status() == 0) {
2627 Debug( LDAP_DEBUG_ANY,
2628 "TLS: PRNG not been seeded with enough data\n",
2633 /* assume if there was enough bits to seed that it's okay
2634 * to write derived bits to the file
2636 RAND_write_file(randfile);
2650 /* From the OpenSSL 0.9.7 distro */
2651 static const char dhpem512[] =
2652 "-----BEGIN DH PARAMETERS-----\n\
2653 MEYCQQDaWDwW2YUiidDkr3VvTMqS3UvlM7gE+w/tlO+cikQD7VdGUNNpmdsp13Yn\n\
2654 a6LT1BLiGPTdHghM9tgAPnxHdOgzAgEC\n\
2655 -----END DH PARAMETERS-----\n";
2657 static const char dhpem1024[] =
2658 "-----BEGIN DH PARAMETERS-----\n\
2659 MIGHAoGBAJf2QmHKtQXdKCjhPx1ottPb0PMTBH9A6FbaWMsTuKG/K3g6TG1Z1fkq\n\
2660 /Gz/PWk/eLI9TzFgqVAuPvr3q14a1aZeVUMTgo2oO5/y2UHe6VaJ+trqCTat3xlx\n\
2661 /mNbIK9HA2RgPC3gWfVLZQrY+gz3ASHHR5nXWHEyvpuZm7m3h+irAgEC\n\
2662 -----END DH PARAMETERS-----\n";
2664 static const char dhpem2048[] =
2665 "-----BEGIN DH PARAMETERS-----\n\
2666 MIIBCAKCAQEA7ZKJNYJFVcs7+6J2WmkEYb8h86tT0s0h2v94GRFS8Q7B4lW9aG9o\n\
2667 AFO5Imov5Jo0H2XMWTKKvbHbSe3fpxJmw/0hBHAY8H/W91hRGXKCeyKpNBgdL8sh\n\
2668 z22SrkO2qCnHJ6PLAMXy5fsKpFmFor2tRfCzrfnggTXu2YOzzK7q62bmqVdmufEo\n\
2669 pT8igNcLpvZxk5uBDvhakObMym9mX3rAEBoe8PwttggMYiiw7NuJKO4MqD1llGkW\n\
2670 aVM8U2ATsCun1IKHrRxynkE1/MJ86VHeYYX8GZt2YA8z+GuzylIOKcMH6JAWzMwA\n\
2671 Gbatw6QwizOhr9iMjZ0B26TE3X8LvW84wwIBAg==\n\
2672 -----END DH PARAMETERS-----\n";
2674 static const char dhpem4096[] =
2675 "-----BEGIN DH PARAMETERS-----\n\
2676 MIICCAKCAgEA/urRnb6vkPYc/KEGXWnbCIOaKitq7ySIq9dTH7s+Ri59zs77zty7\n\
2677 vfVlSe6VFTBWgYjD2XKUFmtqq6CqXMhVX5ElUDoYDpAyTH85xqNFLzFC7nKrff/H\n\
2678 TFKNttp22cZE9V0IPpzedPfnQkE7aUdmF9JnDyv21Z/818O93u1B4r0szdnmEvEF\n\
2679 bKuIxEHX+bp0ZR7RqE1AeifXGJX3d6tsd2PMAObxwwsv55RGkn50vHO4QxtTARr1\n\
2680 rRUV5j3B3oPMgC7Offxx+98Xn45B1/G0Prp11anDsR1PGwtaCYipqsvMwQUSJtyE\n\
2681 EOQWk+yFkeMe4vWv367eEi0Sd/wnC+TSXBE3pYvpYerJ8n1MceI5GQTdarJ77OW9\n\
2682 bGTHmxRsLSCM1jpLdPja5jjb4siAa6EHc4qN9c/iFKS3PQPJEnX7pXKBRs5f7AF3\n\
2683 W3RIGt+G9IVNZfXaS7Z/iCpgzgvKCs0VeqN38QsJGtC1aIkwOeyjPNy2G6jJ4yqH\n\
2684 ovXYt/0mc00vCWeSNS1wren0pR2EiLxX0ypjjgsU1mk/Z3b/+zVf7fZSIB+nDLjb\n\
2685 NPtUlJCVGnAeBK1J1nG3TQicqowOXoM6ISkdaXj5GPJdXHab2+S7cqhKGv5qC7rR\n\
2686 jT6sx7RUr0CNTxzLI7muV2/a4tGmj0PSdXQdsZ7tw7gbXlaWT1+MM2MCAQI=\n\
2687 -----END DH PARAMETERS-----\n";
2689 static const struct dhinfo dhpem[] = {
2690 { 512, dhpem512, sizeof(dhpem512) },
2691 { 1024, dhpem1024, sizeof(dhpem1024) },
2692 { 2048, dhpem2048, sizeof(dhpem2048) },
2693 { 4096, dhpem4096, sizeof(dhpem4096) },
2698 tls_tmp_dh_cb( SSL *ssl, int is_export, int key_length )
2700 struct dhplist *p = NULL;
2705 /* Do we have params of this length already? */
2706 #ifdef LDAP_R_COMPILE
2707 ldap_pvt_thread_mutex_lock( &tls_def_ctx_mutex );
2709 for ( p = dhparams; p; p=p->next ) {
2710 if ( p->keylength == key_length ) {
2711 #ifdef LDAP_R_COMPILE
2712 ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
2718 /* No - check for hardcoded params */
2720 for (i=0; dhpem[i].keylength; i++) {
2721 if ( dhpem[i].keylength == key_length ) {
2722 b = BIO_new_mem_buf( (char *)dhpem[i].pem, dhpem[i].size );
2728 dh = PEM_read_bio_DHparams( b, NULL, NULL, NULL );
2732 /* Generating on the fly is expensive/slow... */
2734 dh = DH_generate_parameters( key_length, DH_GENERATOR_2, NULL, NULL );
2737 p = LDAP_MALLOC( sizeof(struct dhplist) );
2739 p->keylength = key_length;
2746 #ifdef LDAP_R_COMPILE
2747 ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
2753 #endif /* HAVE_OPENSSL */
2756 ldap_pvt_tls_sb_ctx( Sockbuf *sb )
2761 if (HAS_TLS( sb )) {
2762 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&p );
2771 ldap_pvt_tls_get_strength( void *s )
2776 c = SSL_get_current_cipher((SSL *)s);
2777 return SSL_CIPHER_get_bits(c, NULL);
2778 #elif defined(HAVE_GNUTLS)
2779 tls_session *session = s;
2780 gnutls_cipher_algorithm_t c;
2782 c = gnutls_cipher_get( session->session );
2783 return gnutls_cipher_get_key_size( c );
2791 ldap_pvt_tls_get_my_dn( void *s, struct berval *dn, LDAPDN_rewrite_dummy *func, unsigned flags )
2794 struct berval der_dn;
2800 x = SSL_get_certificate((SSL *)s);
2802 if (!x) return LDAP_INVALID_CREDENTIALS;
2804 xn = X509_get_subject_name(x);
2805 der_dn.bv_len = i2d_X509_NAME( xn, NULL );
2806 der_dn.bv_val = xn->bytes->data;
2807 #elif defined(HAVE_GNUTLS)
2808 tls_session *session = s;
2809 const gnutls_datum_t *x;
2812 x = gnutls_certificate_get_ours( session->session );
2814 if (!x) return LDAP_INVALID_CREDENTIALS;
2816 bv.bv_val = x->data;
2817 bv.bv_len = x->size;
2819 x509_cert_get_dn( &bv, &der_dn, 1 );
2821 rc = ldap_X509dn2bv(&der_dn, dn, (LDAPDN_rewrite_func *)func, flags );
2823 #else /* !HAVE_TLS */
2824 return LDAP_NOT_SUPPORTED;
2829 ldap_start_tls( LDAP *ld,
2830 LDAPControl **serverctrls,
2831 LDAPControl **clientctrls,
2834 return ldap_extended_operation( ld, LDAP_EXOP_START_TLS,
2835 NULL, serverctrls, clientctrls, msgidp );
2839 ldap_install_tls( LDAP *ld )
2842 return LDAP_NOT_SUPPORTED;
2844 if ( ldap_tls_inplace( ld ) ) {
2845 return LDAP_LOCAL_ERROR;
2848 return ldap_int_tls_start( ld, ld->ld_defconn, NULL );
2853 ldap_start_tls_s ( LDAP *ld,
2854 LDAPControl **serverctrls,
2855 LDAPControl **clientctrls )
2858 return LDAP_NOT_SUPPORTED;
2861 char *rspoid = NULL;
2862 struct berval *rspdata = NULL;
2864 /* XXYYZ: this initiates operation only on default connection! */
2866 if ( ldap_tls_inplace( ld ) ) {
2867 return LDAP_LOCAL_ERROR;
2870 rc = ldap_extended_operation_s( ld, LDAP_EXOP_START_TLS,
2871 NULL, serverctrls, clientctrls, &rspoid, &rspdata );
2873 if ( rspoid != NULL ) {
2877 if ( rspdata != NULL ) {
2878 ber_bvfree( rspdata );
2881 if ( rc == LDAP_SUCCESS ) {
2882 rc = ldap_int_tls_start( ld, ld->ld_defconn, NULL );
2889 /* These tags probably all belong in lber.h, but they're
2890 * not normally encountered when processing LDAP, so maybe
2891 * they belong somewhere else instead.
2894 #define LBER_TAG_OID ((ber_tag_t) 0x06UL)
2896 /* Tags for string types used in a DirectoryString.
2898 * Note that IA5string is not one of the defined choices for
2899 * DirectoryString in X.520, but it gets used for email AVAs.
2901 #define LBER_TAG_UTF8 ((ber_tag_t) 0x0cUL)
2902 #define LBER_TAG_PRINTABLE ((ber_tag_t) 0x13UL)
2903 #define LBER_TAG_TELETEX ((ber_tag_t) 0x14UL)
2904 #define LBER_TAG_IA5 ((ber_tag_t) 0x16UL)
2905 #define LBER_TAG_UNIVERSAL ((ber_tag_t) 0x1cUL)
2906 #define LBER_TAG_BMP ((ber_tag_t) 0x1eUL)
2909 find_oid( struct berval *oid )
2913 for ( i=0; !BER_BVISNULL( &oids[i].oid ); i++ ) {
2914 if ( oids[i].oid.bv_len != oid->bv_len ) continue;
2915 if ( !strcmp( oids[i].oid.bv_val, oid->bv_val ))
2921 /* Convert a structured DN from an X.509 certificate into an LDAPV3 DN.
2922 * x509_name must be raw DER. If func is non-NULL, the
2923 * constructed DN will use numeric OIDs to identify attributeTypes,
2924 * and the func() will be invoked to rewrite the DN with the given
2927 * Otherwise the DN will use shortNames from a hardcoded table.
2930 ldap_X509dn2bv( void *x509_name, struct berval *bv, LDAPDN_rewrite_func *func,
2935 LDAPAVA *newAVA, *baseAVA;
2936 BerElementBuffer berbuf;
2937 BerElement *ber = (BerElement *)&berbuf;
2938 char oids[8192], *oidptr = oids, *oidbuf = NULL;
2940 char *dn_end, *rdn_end;
2941 int i, navas, nrdns, rc = LDAP_SUCCESS;
2942 size_t dnsize, oidrem = sizeof(oids), oidsize = 0;
2948 struct berval Oid, Val, oid2, *in = x509_name;
2950 assert( bv != NULL );
2958 /* A DN is a SEQUENCE of RDNs. An RDN is a SET of AVAs.
2959 * An AVA is a SEQUENCE of attr and value.
2960 * Count the number of AVAs and RDNs
2962 ber_init2( ber, in, LBER_USE_DER );
2963 tag = ber_peek_tag( ber, &len );
2964 if ( tag != LBER_SEQUENCE )
2965 return LDAP_DECODING_ERROR;
2967 for ( tag = ber_first_element( ber, &len, &dn_end );
2969 tag = ber_next_element( ber, &len, dn_end )) {
2971 for ( tag = ber_first_element( ber, &len, &rdn_end );
2972 tag == LBER_SEQUENCE;
2973 tag = ber_next_element( ber, &len, rdn_end )) {
2974 tag = ber_skip_tag( ber, &len );
2975 ber_skip_data( ber, len );
2980 /* Allocate the DN/RDN/AVA stuff as a single block */
2981 dnsize = sizeof(LDAPRDN) * (nrdns+1);
2982 dnsize += sizeof(LDAPAVA *) * (navas+nrdns);
2983 dnsize += sizeof(LDAPAVA) * navas;
2984 if (dnsize > sizeof(ptrs)) {
2985 newDN = (LDAPDN)LDAP_MALLOC( dnsize );
2986 if ( newDN == NULL )
2987 return LDAP_NO_MEMORY;
2989 newDN = (LDAPDN)(char *)ptrs;
2992 newDN[nrdns] = NULL;
2993 newRDN = (LDAPRDN)(newDN + nrdns+1);
2994 newAVA = (LDAPAVA *)(newRDN + navas + nrdns);
2997 /* Rewind and start extracting */
3000 tag = ber_first_element( ber, &len, &dn_end );
3001 for ( i = nrdns - 1; i >= 0; i-- ) {
3004 for ( tag = ber_first_element( ber, &len, &rdn_end );
3005 tag == LBER_SEQUENCE;
3006 tag = ber_next_element( ber, &len, rdn_end )) {
3009 tag = ber_skip_tag( ber, &len );
3010 tag = ber_get_stringbv( ber, &Oid, LBER_BV_NOTERM );
3011 if ( tag != LBER_TAG_OID ) {
3012 rc = LDAP_DECODING_ERROR;
3016 oid2.bv_val = oidptr;
3017 oid2.bv_len = oidrem;
3018 ber_decode_oid( &Oid, &oid2 );
3019 oidname = find_oid( &oid2 );
3021 newAVA->la_attr = oid2;
3022 oidptr += oid2.bv_len + 1;
3023 oidrem -= oid2.bv_len + 1;
3025 /* Running out of OID buffer space? */
3027 if ( oidsize == 0 ) {
3028 oidsize = sizeof(oids) * 2;
3030 oidbuf = LDAP_MALLOC( oidsize );
3031 if ( oidbuf == NULL ) goto nomem;
3035 oidbuf = LDAP_REALLOC( oidbuf, oidsize*2 );
3036 if ( oidbuf == NULL ) goto nomem;
3037 /* Buffer moved! Fix AVA pointers */
3038 if ( old != oidbuf ) {
3040 long dif = oidbuf - old;
3042 for (a=baseAVA; a<=newAVA; a++){
3043 if (a->la_attr.bv_val >= old &&
3044 a->la_attr.bv_val <= (old + oidsize))
3045 a->la_attr.bv_val += dif;
3048 oidptr = oidbuf + oidsize - oidrem;
3055 newAVA->la_attr = oidname->oid;
3057 newAVA->la_attr = oidname->name;
3060 tag = ber_get_stringbv( ber, &Val, LBER_BV_NOTERM );
3062 case LBER_TAG_UNIVERSAL:
3063 /* This uses 32-bit ISO 10646-1 */
3064 csize = 4; goto to_utf8;
3066 /* This uses 16-bit ISO 10646-1 */
3067 csize = 2; goto to_utf8;
3068 case LBER_TAG_TELETEX:
3069 /* This uses 8-bit, assume ISO 8859-1 */
3071 to_utf8: rc = ldap_ucs_to_utf8s( &Val, csize, &newAVA->la_value );
3072 newAVA->la_flags |= LDAP_AVA_FREE_VALUE;
3073 if (rc != LDAP_SUCCESS) goto nomem;
3074 newAVA->la_flags = LDAP_AVA_NONPRINTABLE;
3077 newAVA->la_flags = LDAP_AVA_NONPRINTABLE;
3078 /* This is already in UTF-8 encoding */
3080 case LBER_TAG_PRINTABLE:
3081 /* These are always 7-bit strings */
3082 newAVA->la_value = Val;
3086 newAVA->la_private = NULL;
3087 newAVA->la_flags = LDAP_AVA_STRING;
3091 tag = ber_next_element( ber, &len, dn_end );
3095 rc = func( newDN, flags, NULL );
3096 if ( rc != LDAP_SUCCESS )
3100 rc = ldap_dn2bv_x( newDN, bv, LDAP_DN_FORMAT_LDAPV3, NULL );
3103 for (;baseAVA < newAVA; baseAVA++) {
3104 if (baseAVA->la_flags & LDAP_AVA_FREE_ATTR)
3105 LDAP_FREE( baseAVA->la_attr.bv_val );
3106 if (baseAVA->la_flags & LDAP_AVA_FREE_VALUE)
3107 LDAP_FREE( baseAVA->la_value.bv_val );
3111 LDAP_FREE( oidbuf );
3112 if ( newDN != (LDAPDN)(char *) ptrs )