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 1998-2009 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 )
68 /* RFC2459 minimum required set of supported attribute types
71 typedef struct oid_name {
76 #define CN_OID oids[0].oid.bv_val
78 static oid_name oids[] = {
79 { BER_BVC("2.5.4.3"), BER_BVC("cn") },
80 { BER_BVC("2.5.4.4"), BER_BVC("sn") },
81 { BER_BVC("2.5.4.6"), BER_BVC("c") },
82 { BER_BVC("2.5.4.7"), BER_BVC("l") },
83 { BER_BVC("2.5.4.8"), BER_BVC("st") },
84 { BER_BVC("2.5.4.10"), BER_BVC("o") },
85 { BER_BVC("2.5.4.11"), BER_BVC("ou") },
86 { BER_BVC("2.5.4.12"), BER_BVC("title") },
87 { BER_BVC("2.5.4.41"), BER_BVC("name") },
88 { BER_BVC("2.5.4.42"), BER_BVC("givenName") },
89 { BER_BVC("2.5.4.43"), BER_BVC("initials") },
90 { BER_BVC("2.5.4.44"), BER_BVC("generationQualifier") },
91 { BER_BVC("2.5.4.46"), BER_BVC("dnQualifier") },
92 { BER_BVC("1.2.840.113549.1.9.1"), BER_BVC("email") },
93 { BER_BVC("0.9.2342.19200300.100.1.25"), BER_BVC("dc") },
94 { BER_BVNULL, BER_BVNULL }
100 typedef struct tls_cipher_suite {
102 gnutls_kx_algorithm_t kx;
103 gnutls_cipher_algorithm_t cipher;
104 gnutls_mac_algorithm_t mac;
105 gnutls_protocol_t version;
108 static tls_cipher_suite *ciphers;
109 static int n_ciphers;
111 /* sorta replacing SSL_CTX */
112 typedef struct tls_ctx {
113 struct ldapoptions *lo;
114 gnutls_certificate_credentials_t cred;
115 gnutls_dh_params_t dh_params;
116 unsigned long verify_depth;
121 #ifdef LDAP_R_COMPILE
122 ldap_pvt_thread_mutex_t ref_mutex;
126 /* sorta replacing SSL */
127 typedef struct tls_session {
129 gnutls_session_t session;
130 struct berval peer_der_dn;
133 #ifdef LDAP_R_COMPILE
136 ldap_pvt_gcry_mutex_init( void **priv )
139 ldap_pvt_thread_mutex_t *lock = LDAP_MALLOC( sizeof( ldap_pvt_thread_mutex_t ));
144 err = ldap_pvt_thread_mutex_init( lock );
153 ldap_pvt_gcry_mutex_destroy( void **lock )
155 int err = ldap_pvt_thread_mutex_destroy( *lock );
160 ldap_pvt_gcry_mutex_lock( void **lock )
162 return ldap_pvt_thread_mutex_lock( *lock );
165 ldap_pvt_gcry_mutex_unlock( void **lock )
167 return ldap_pvt_thread_mutex_unlock( *lock );
170 static struct gcry_thread_cbs ldap_generic_thread_cbs = {
171 GCRY_THREAD_OPTION_USER,
173 ldap_pvt_gcry_mutex_init,
174 ldap_pvt_gcry_mutex_destroy,
175 ldap_pvt_gcry_mutex_lock,
176 ldap_pvt_gcry_mutex_unlock,
177 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
181 tls_init_threads( void )
183 gcry_control (GCRYCTL_SET_THREAD_CBS, &ldap_generic_thread_cbs);
185 #endif /* LDAP_R_COMPILE */
188 ldap_pvt_tls_ctx_free ( void *c )
195 #ifdef LDAP_R_COMPILE
196 ldap_pvt_thread_mutex_lock( &ctx->ref_mutex );
198 refcount = --ctx->refcount;
199 #ifdef LDAP_R_COMPILE
200 ldap_pvt_thread_mutex_unlock( &ctx->ref_mutex );
204 LDAP_FREE( ctx->kx_list );
205 gnutls_certificate_free_credentials( ctx->cred );
210 tls_ctx_new ( struct ldapoptions *lo )
214 ctx = ber_memcalloc ( 1, sizeof (*ctx) );
217 if ( gnutls_certificate_allocate_credentials( &ctx->cred )) {
222 #ifdef LDAP_R_COMPILE
223 ldap_pvt_thread_mutex_init( &ctx->ref_mutex );
230 tls_ctx_ref( tls_ctx *ctx )
232 #ifdef LDAP_R_COMPILE
233 ldap_pvt_thread_mutex_lock( &ctx->ref_mutex );
236 #ifdef LDAP_R_COMPILE
237 ldap_pvt_thread_mutex_unlock( &ctx->ref_mutex );
242 tls_session_new ( tls_ctx * ctx, int is_server )
244 tls_session *session;
246 session = ber_memcalloc ( 1, sizeof (*session) );
251 gnutls_init( &session->session, is_server ? GNUTLS_SERVER : GNUTLS_CLIENT );
252 gnutls_set_default_priority( session->session );
253 if ( ctx->kx_list ) {
254 gnutls_kx_set_priority( session->session, ctx->kx_list );
255 gnutls_cipher_set_priority( session->session, ctx->cipher_list );
256 gnutls_mac_set_priority( session->session, ctx->mac_list );
259 gnutls_credentials_set( session->session, GNUTLS_CRD_CERTIFICATE, ctx->cred );
263 if ( ctx->lo->ldo_tls_require_cert ) {
264 flag = GNUTLS_CERT_REQUEST;
265 if ( ctx->lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_DEMAND ||
266 ctx->lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_HARD )
267 flag = GNUTLS_CERT_REQUIRE;
268 gnutls_certificate_server_set_request( session->session, flag );
275 tls_session_free ( tls_session * session )
277 ber_memfree ( session );
280 #define tls_session_connect( ssl ) gnutls_handshake( ssl->session )
281 #define tls_session_accept( ssl ) gnutls_handshake( ssl->session )
283 /* suites is a string of colon-separated cipher suite names. */
285 tls_parse_ciphers( tls_ctx *ctx, char *suites )
289 int *list, nkx = 0, ncipher = 0, nmac = 0;
290 int *kx, *cipher, *mac;
295 end = strchr(ptr, ':');
300 for (i=0; i<n_ciphers; i++) {
301 if ( !strncasecmp( ciphers[i].name, ptr, len )) {
306 if ( i == n_ciphers ) {
307 /* unrecognized cipher suite */
313 /* Space for all 3 lists */
314 list = LDAP_MALLOC( (num+1) * sizeof(int) * 3 );
323 end = strchr(ptr, ':');
328 for (i=0; i<n_ciphers; i++) {
329 /* For each cipher suite, insert its algorithms into
330 * their respective priority lists. Make sure they
331 * only appear once in each list.
333 if ( !strncasecmp( ciphers[i].name, ptr, len )) {
334 for (j=0; j<nkx; j++)
335 if ( kx[j] == ciphers[i].kx )
338 kx[nkx++] = ciphers[i].kx;
339 for (j=0; j<ncipher; j++)
340 if ( cipher[j] == ciphers[i].cipher )
343 cipher[ncipher++] = ciphers[i].cipher;
344 for (j=0; j<nmac; j++)
345 if ( mac[j] == ciphers[i].mac )
348 mac[nmac++] = ciphers[i].mac;
358 ctx->cipher_list = cipher;
365 typedef SSL_CTX tls_ctx;
366 typedef SSL tls_session;
368 static int tls_opt_trace = 1;
369 static char *tls_opt_randfile = NULL;
371 static void tls_report_error( void );
373 static void tls_info_cb( const SSL *ssl, int where, int ret );
374 static int tls_verify_cb( int ok, X509_STORE_CTX *ctx );
375 static int tls_verify_ok( int ok, X509_STORE_CTX *ctx );
376 static RSA * tls_tmp_rsa_cb( SSL *ssl, int is_export, int key_length );
378 static DH * tls_tmp_dh_cb( SSL *ssl, int is_export, int key_length );
380 typedef struct dhplist {
381 struct dhplist *next;
386 static dhplist *dhparams;
388 static int tls_seed_PRNG( const char *randfile );
390 #ifdef LDAP_R_COMPILE
392 * provide mutexes for the SSLeay library.
394 static ldap_pvt_thread_mutex_t tls_mutexes[CRYPTO_NUM_LOCKS];
396 static void tls_locking_cb( int mode, int type, const char *file, int line )
398 if ( mode & CRYPTO_LOCK ) {
399 ldap_pvt_thread_mutex_lock( &tls_mutexes[type] );
401 ldap_pvt_thread_mutex_unlock( &tls_mutexes[type] );
405 static unsigned long tls_thread_self( void )
407 /* FIXME: CRYPTO_set_id_callback only works when ldap_pvt_thread_t
408 * is an integral type that fits in an unsigned long
411 /* force an error if the ldap_pvt_thread_t type is too large */
412 enum { ok = sizeof( ldap_pvt_thread_t ) <= sizeof( unsigned long ) };
413 typedef struct { int dummy: ok ? 1 : -1; } Check[ok ? 1 : -1];
415 return (unsigned long) ldap_pvt_thread_self();
418 static void tls_init_threads( void )
422 for( i=0; i< CRYPTO_NUM_LOCKS ; i++ ) {
423 ldap_pvt_thread_mutex_init( &tls_mutexes[i] );
425 CRYPTO_set_locking_callback( tls_locking_cb );
426 CRYPTO_set_id_callback( tls_thread_self );
428 #endif /* LDAP_R_COMPILE */
431 ldap_pvt_tls_ctx_free ( void *c )
438 tls_ctx_new( struct ldapoptions *lo )
440 return SSL_CTX_new( SSLv23_method() );
444 tls_ctx_ref( void *c )
447 CRYPTO_add( &ctx->references, 1, CRYPTO_LOCK_SSL_CTX );
451 tls_session_new( tls_ctx *ctx, int is_server )
453 return SSL_new( ctx );
456 #define tls_session_connect( ssl ) SSL_connect( ssl )
457 #define tls_session_accept( ssl ) SSL_accept( ssl )
459 static STACK_OF(X509_NAME) *
460 get_ca_list( char * bundle, char * dir )
462 STACK_OF(X509_NAME) *ca_list = NULL;
465 ca_list = SSL_load_client_CA_file( bundle );
467 #if defined(HAVE_DIRENT_H) || defined(dirent)
472 ca_list = sk_X509_NAME_new_null();
475 if ( !SSL_add_dir_cert_subjects_to_stack( ca_list, dir ) &&
477 sk_X509_NAME_free( ca_list );
485 #endif /* HAVE_GNUTLS */
487 #ifdef LDAP_R_COMPILE
489 * an extra mutex for the default ctx.
491 static ldap_pvt_thread_mutex_t tls_def_ctx_mutex;
495 ldap_int_tls_destroy( struct ldapoptions *lo )
497 if ( lo->ldo_tls_ctx ) {
498 ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx );
499 lo->ldo_tls_ctx = NULL;
502 if ( lo->ldo_tls_certfile ) {
503 LDAP_FREE( lo->ldo_tls_certfile );
504 lo->ldo_tls_certfile = NULL;
506 if ( lo->ldo_tls_keyfile ) {
507 LDAP_FREE( lo->ldo_tls_keyfile );
508 lo->ldo_tls_keyfile = NULL;
510 if ( lo->ldo_tls_dhfile ) {
511 LDAP_FREE( lo->ldo_tls_dhfile );
512 lo->ldo_tls_dhfile = NULL;
514 if ( lo->ldo_tls_cacertfile ) {
515 LDAP_FREE( lo->ldo_tls_cacertfile );
516 lo->ldo_tls_cacertfile = NULL;
518 if ( lo->ldo_tls_cacertdir ) {
519 LDAP_FREE( lo->ldo_tls_cacertdir );
520 lo->ldo_tls_cacertdir = NULL;
522 if ( lo->ldo_tls_ciphersuite ) {
523 LDAP_FREE( lo->ldo_tls_ciphersuite );
524 lo->ldo_tls_ciphersuite = NULL;
527 if ( lo->ldo_tls_crlfile ) {
528 LDAP_FREE( lo->ldo_tls_crlfile );
529 lo->ldo_tls_crlfile = NULL;
535 * Tear down the TLS subsystem. Should only be called once.
538 ldap_pvt_tls_destroy( void )
540 struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT();
542 ldap_int_tls_destroy( lo );
545 LDAP_FREE( ciphers );
548 gnutls_global_deinit();
554 if ( tls_opt_randfile ) {
555 LDAP_FREE( tls_opt_randfile );
556 tls_opt_randfile = NULL;
562 * Initialize TLS subsystem. Should be called only once.
565 ldap_pvt_tls_init( void )
567 static int tls_initialized = 0;
569 if ( tls_initialized++ ) return 0;
571 #ifdef LDAP_R_COMPILE
573 ldap_pvt_thread_mutex_init( &tls_def_ctx_mutex );
577 gnutls_global_init ();
579 /* GNUtls cipher suite handling: The library ought to parse suite
580 * names for us, but it doesn't. It will return a list of suite names
581 * that it supports, so we can do parsing ourselves. It ought to tell
582 * us how long the list is, but it doesn't do that either, so we just
583 * have to count it manually...
587 tls_cipher_suite *ptr, tmp;
590 while ( gnutls_cipher_suite_info( i, cs_id, &tmp.kx, &tmp.cipher,
591 &tmp.mac, &tmp.version ))
596 ciphers = LDAP_MALLOC(n_ciphers * sizeof(tls_cipher_suite));
599 for ( i=0; i<n_ciphers; i++ ) {
600 ciphers[i].name = gnutls_cipher_suite_info( i, cs_id,
601 &ciphers[i].kx, &ciphers[i].cipher, &ciphers[i].mac,
602 &ciphers[i].version );
606 #else /* !HAVE_GNUTLS */
610 char *file = LDAP_STRDUP( tls_opt_randfile );
611 if ( file ) __atoe( file );
612 (void) tls_seed_PRNG( file );
616 (void) tls_seed_PRNG( tls_opt_randfile );
619 SSL_load_error_strings();
620 SSLeay_add_ssl_algorithms();
622 /* FIXME: mod_ssl does this */
623 X509V3_add_standard_extensions();
625 #endif /* HAVE_GNUTLS */
630 * initialize a new TLS context
633 ldap_int_tls_init_ctx( struct ldapoptions *lo, int is_server )
636 char *ciphersuite = lo->ldo_tls_ciphersuite;
637 char *cacertfile = lo->ldo_tls_cacertfile;
638 char *cacertdir = lo->ldo_tls_cacertdir;
639 char *certfile = lo->ldo_tls_certfile;
640 char *keyfile = lo->ldo_tls_keyfile;
642 char *crlfile = lo->ldo_tls_crlfile;
644 char *dhfile = lo->ldo_tls_dhfile;
647 if ( lo->ldo_tls_ctx )
652 if ( is_server && !certfile && !keyfile && !cacertfile && !cacertdir ) {
653 /* minimum configuration not provided */
654 return LDAP_NOT_SUPPORTED;
658 /* This ASCII/EBCDIC handling is a real pain! */
660 ciphersuite = LDAP_STRDUP( ciphersuite );
661 __atoe( ciphersuite );
664 cacertfile = LDAP_STRDUP( cacertfile );
665 __atoe( cacertfile );
668 certfile = LDAP_STRDUP( certfile );
672 keyfile = LDAP_STRDUP( keyfile );
677 crlfile = LDAP_STRDUP( crlfile );
682 cacertdir = LDAP_STRDUP( cacertdir );
686 dhfile = LDAP_STRDUP( dhfile );
691 lo->ldo_tls_ctx = tls_ctx_new( lo );
692 if ( lo->ldo_tls_ctx == NULL ) {
694 Debug( LDAP_DEBUG_ANY,
695 "TLS: could not allocate default ctx.\n",
698 Debug( LDAP_DEBUG_ANY,
699 "TLS: could not allocate default ctx (%lu).\n",
700 ERR_peek_error(),0,0);
707 if ( lo->ldo_tls_ciphersuite &&
708 tls_parse_ciphers( lo->ldo_tls_ctx,
710 Debug( LDAP_DEBUG_ANY,
711 "TLS: could not set cipher list %s.\n",
712 lo->ldo_tls_ciphersuite, 0, 0 );
717 if (lo->ldo_tls_cacertdir != NULL) {
718 Debug( LDAP_DEBUG_ANY,
719 "TLS: warning: cacertdir not implemented for gnutls\n",
723 if (lo->ldo_tls_cacertfile != NULL) {
724 rc = gnutls_certificate_set_x509_trust_file(
725 ((tls_ctx*) lo->ldo_tls_ctx)->cred,
727 GNUTLS_X509_FMT_PEM );
728 if ( rc < 0 ) goto error_exit;
731 if ( lo->ldo_tls_certfile && lo->ldo_tls_keyfile ) {
732 rc = gnutls_certificate_set_x509_key_file(
733 ((tls_ctx*) lo->ldo_tls_ctx)->cred,
736 GNUTLS_X509_FMT_PEM );
737 if ( rc ) goto error_exit;
738 } else if ( lo->ldo_tls_certfile || lo->ldo_tls_keyfile ) {
739 Debug( LDAP_DEBUG_ANY,
740 "TLS: only one of certfile and keyfile specified\n",
746 if ( lo->ldo_tls_dhfile ) {
747 Debug( LDAP_DEBUG_ANY,
748 "TLS: warning: ignoring dhfile\n",
752 if ( lo->ldo_tls_crlfile ) {
753 rc = gnutls_certificate_set_x509_crl_file(
754 ((tls_ctx*) lo->ldo_tls_ctx)->cred,
756 GNUTLS_X509_FMT_PEM );
757 if ( rc < 0 ) goto error_exit;
761 gnutls_dh_params_init (&((tls_ctx*)
762 lo->ldo_tls_ctx)->dh_params);
763 gnutls_dh_params_generate2 (((tls_ctx*)
764 lo->ldo_tls_ctx)->dh_params,
768 #else /* !HAVE_GNUTLS */
771 SSL_CTX_set_session_id_context( lo->ldo_tls_ctx,
772 (const unsigned char *) "OpenLDAP", sizeof("OpenLDAP")-1 );
775 if (lo->ldo_tls_protocol_min > LDAP_OPT_X_TLS_PROTOCOL_SSL3)
776 SSL_CTX_set_options( lo->ldo_tls_ctx,
777 SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 );
778 else if (lo->ldo_tls_protocol_min > LDAP_OPT_X_TLS_PROTOCOL_SSL2)
779 SSL_CTX_set_options( lo->ldo_tls_ctx, SSL_OP_NO_SSLv2 );
781 if ( lo->ldo_tls_ciphersuite &&
782 !SSL_CTX_set_cipher_list( lo->ldo_tls_ctx, ciphersuite ) )
784 Debug( LDAP_DEBUG_ANY,
785 "TLS: could not set cipher list %s.\n",
786 lo->ldo_tls_ciphersuite, 0, 0 );
792 if (lo->ldo_tls_cacertfile != NULL || lo->ldo_tls_cacertdir != NULL) {
793 if ( !SSL_CTX_load_verify_locations( lo->ldo_tls_ctx,
794 cacertfile, cacertdir ) ||
795 !SSL_CTX_set_default_verify_paths( lo->ldo_tls_ctx ) )
797 Debug( LDAP_DEBUG_ANY, "TLS: "
798 "could not load verify locations (file:`%s',dir:`%s').\n",
799 lo->ldo_tls_cacertfile ? lo->ldo_tls_cacertfile : "",
800 lo->ldo_tls_cacertdir ? lo->ldo_tls_cacertdir : "",
808 STACK_OF(X509_NAME) *calist;
809 /* List of CA names to send to a client */
810 calist = get_ca_list( cacertfile, cacertdir );
812 Debug( LDAP_DEBUG_ANY, "TLS: "
813 "could not load client CA list (file:`%s',dir:`%s').\n",
814 lo->ldo_tls_cacertfile ? lo->ldo_tls_cacertfile : "",
815 lo->ldo_tls_cacertdir ? lo->ldo_tls_cacertdir : "",
822 SSL_CTX_set_client_CA_list( lo->ldo_tls_ctx, calist );
826 if ( lo->ldo_tls_certfile &&
827 !SSL_CTX_use_certificate_file( lo->ldo_tls_ctx,
828 certfile, SSL_FILETYPE_PEM ) )
830 Debug( LDAP_DEBUG_ANY,
831 "TLS: could not use certificate `%s'.\n",
832 lo->ldo_tls_certfile,0,0);
838 /* Key validity is checked automatically if cert has already been set */
839 if ( lo->ldo_tls_keyfile &&
840 !SSL_CTX_use_PrivateKey_file( lo->ldo_tls_ctx,
841 keyfile, SSL_FILETYPE_PEM ) )
843 Debug( LDAP_DEBUG_ANY,
844 "TLS: could not use key file `%s'.\n",
845 lo->ldo_tls_keyfile,0,0);
851 if ( lo->ldo_tls_dhfile ) {
856 if (( bio=BIO_new_file( dhfile,"r" )) == NULL ) {
857 Debug( LDAP_DEBUG_ANY,
858 "TLS: could not use DH parameters file `%s'.\n",
859 lo->ldo_tls_dhfile,0,0);
864 while (( dh=PEM_read_bio_DHparams( bio, NULL, NULL, NULL ))) {
865 p = LDAP_MALLOC( sizeof(dhplist) );
867 p->keylength = DH_size( dh ) * 8;
876 if ( tls_opt_trace ) {
877 SSL_CTX_set_info_callback( (SSL_CTX *)lo->ldo_tls_ctx, tls_info_cb );
881 if ( lo->ldo_tls_require_cert ) {
883 if ( lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_DEMAND ||
884 lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_HARD ) {
885 i |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
889 SSL_CTX_set_verify( lo->ldo_tls_ctx, i,
890 lo->ldo_tls_require_cert == LDAP_OPT_X_TLS_ALLOW ?
891 tls_verify_ok : tls_verify_cb );
892 SSL_CTX_set_tmp_rsa_callback( lo->ldo_tls_ctx, tls_tmp_rsa_cb );
893 if ( lo->ldo_tls_dhfile ) {
894 SSL_CTX_set_tmp_dh_callback( lo->ldo_tls_ctx, tls_tmp_dh_cb );
896 #ifdef HAVE_OPENSSL_CRL
897 if ( lo->ldo_tls_crlcheck ) {
898 X509_STORE *x509_s = SSL_CTX_get_cert_store( lo->ldo_tls_ctx );
899 if ( lo->ldo_tls_crlcheck == LDAP_OPT_X_TLS_CRL_PEER ) {
900 X509_STORE_set_flags( x509_s, X509_V_FLAG_CRL_CHECK );
901 } else if ( lo->ldo_tls_crlcheck == LDAP_OPT_X_TLS_CRL_ALL ) {
902 X509_STORE_set_flags( x509_s,
903 X509_V_FLAG_CRL_CHECK | X509_V_FLAG_CRL_CHECK_ALL );
908 #endif /* HAVE_GNUTLS */
911 if ( rc == -1 && lo->ldo_tls_ctx != NULL ) {
912 ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx );
913 lo->ldo_tls_ctx = NULL;
916 LDAP_FREE( ciphersuite );
917 LDAP_FREE( cacertfile );
918 LDAP_FREE( certfile );
919 LDAP_FREE( keyfile );
921 LDAP_FREE( crlfile );
923 LDAP_FREE( cacertdir );
931 * initialize the default context
934 ldap_pvt_tls_init_def_ctx( int is_server )
936 struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT();
938 #ifdef LDAP_R_COMPILE
939 ldap_pvt_thread_mutex_lock( &tls_def_ctx_mutex );
941 rc = ldap_int_tls_init_ctx( lo, is_server );
942 #ifdef LDAP_R_COMPILE
943 ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
949 alloc_handle( void *ctx_arg, int is_server )
957 struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT();
958 if ( ldap_pvt_tls_init_def_ctx( is_server ) < 0 ) return NULL;
959 ctx = lo->ldo_tls_ctx;
962 ssl = tls_session_new( ctx, is_server );
964 Debug( LDAP_DEBUG_ANY,"TLS: can't create ssl handle.\n",0,0,0);
971 update_flags( Sockbuf *sb, tls_session * ssl, int rc )
973 sb->sb_trans_needs_read = 0;
974 sb->sb_trans_needs_write = 0;
977 if ( rc != GNUTLS_E_INTERRUPTED && rc != GNUTLS_E_AGAIN )
980 switch (gnutls_record_get_direction (ssl->session)) {
982 sb->sb_trans_needs_read = 1;
985 sb->sb_trans_needs_write = 1;
988 #else /* !HAVE_GNUTLS */
989 rc = SSL_get_error(ssl, rc);
990 if (rc == SSL_ERROR_WANT_READ) {
991 sb->sb_trans_needs_read = 1;
994 } else if (rc == SSL_ERROR_WANT_WRITE) {
995 sb->sb_trans_needs_write = 1;
998 } else if (rc == SSL_ERROR_WANT_CONNECT) {
1001 #endif /* HAVE_GNUTLS */
1006 * TLS support for LBER Sockbufs
1011 Sockbuf_IO_Desc *sbiod;
1017 sb_gtls_recv( gnutls_transport_ptr_t ptr, void *buf, size_t len )
1021 if ( buf == NULL || len <= 0 ) return 0;
1023 p = (struct tls_data *)ptr;
1025 if ( p == NULL || p->sbiod == NULL ) {
1029 return LBER_SBIOD_READ_NEXT( p->sbiod, buf, len );
1033 sb_gtls_send( gnutls_transport_ptr_t ptr, const void *buf, size_t len )
1037 if ( buf == NULL || len <= 0 ) return 0;
1039 p = (struct tls_data *)ptr;
1041 if ( p == NULL || p->sbiod == NULL ) {
1045 return LBER_SBIOD_WRITE_NEXT( p->sbiod, (char *)buf, len );
1049 sb_tls_setup( Sockbuf_IO_Desc *sbiod, void *arg )
1052 tls_session *session = arg;
1054 assert( sbiod != NULL );
1056 p = LBER_MALLOC( sizeof( *p ) );
1061 gnutls_transport_set_ptr( session->session, (gnutls_transport_ptr)p );
1062 gnutls_transport_set_pull_function( session->session, sb_gtls_recv );
1063 gnutls_transport_set_push_function( session->session, sb_gtls_send );
1066 sbiod->sbiod_pvt = p;
1071 sb_tls_remove( Sockbuf_IO_Desc *sbiod )
1075 assert( sbiod != NULL );
1076 assert( sbiod->sbiod_pvt != NULL );
1078 p = (struct tls_data *)sbiod->sbiod_pvt;
1079 gnutls_deinit ( p->ssl->session );
1080 LBER_FREE( p->ssl );
1081 LBER_FREE( sbiod->sbiod_pvt );
1082 sbiod->sbiod_pvt = NULL;
1087 sb_tls_close( Sockbuf_IO_Desc *sbiod )
1091 assert( sbiod != NULL );
1092 assert( sbiod->sbiod_pvt != NULL );
1094 p = (struct tls_data *)sbiod->sbiod_pvt;
1095 gnutls_bye ( p->ssl->session, GNUTLS_SHUT_RDWR );
1100 sb_tls_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
1104 assert( sbiod != NULL );
1105 assert( sbiod->sbiod_pvt != NULL );
1107 p = (struct tls_data *)sbiod->sbiod_pvt;
1109 if ( opt == LBER_SB_OPT_GET_SSL ) {
1110 *((tls_session **)arg) = p->ssl;
1113 } else if ( opt == LBER_SB_OPT_DATA_READY ) {
1114 if( gnutls_record_check_pending( p->ssl->session ) > 0 ) {
1119 return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
1123 sb_tls_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
1129 assert( sbiod != NULL );
1130 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
1132 p = (struct tls_data *)sbiod->sbiod_pvt;
1134 ret = gnutls_record_recv ( p->ssl->session, buf, len );
1136 case GNUTLS_E_INTERRUPTED:
1137 case GNUTLS_E_AGAIN:
1138 sbiod->sbiod_sb->sb_trans_needs_read = 1;
1139 sock_errset(EWOULDBLOCK);
1142 case GNUTLS_E_REHANDSHAKE:
1143 for ( ret = gnutls_handshake ( p->ssl->session );
1144 ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN;
1145 ret = gnutls_handshake ( p->ssl->session ) );
1146 sbiod->sbiod_sb->sb_trans_needs_read = 1;
1150 sbiod->sbiod_sb->sb_trans_needs_read = 0;
1156 sb_tls_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
1162 assert( sbiod != NULL );
1163 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
1165 p = (struct tls_data *)sbiod->sbiod_pvt;
1167 ret = gnutls_record_send ( p->ssl->session, (char *)buf, len );
1169 if ( ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN ) {
1170 sbiod->sbiod_sb->sb_trans_needs_write = 1;
1171 sock_errset(EWOULDBLOCK);
1174 sbiod->sbiod_sb->sb_trans_needs_write = 0;
1179 #else /* !HAVE_GNUTLS */
1182 sb_tls_bio_create( BIO *b ) {
1191 sb_tls_bio_destroy( BIO *b )
1193 if ( b == NULL ) return 0;
1195 b->ptr = NULL; /* sb_tls_remove() will free it */
1202 sb_tls_bio_read( BIO *b, char *buf, int len )
1207 if ( buf == NULL || len <= 0 ) return 0;
1209 p = (struct tls_data *)b->ptr;
1211 if ( p == NULL || p->sbiod == NULL ) {
1215 ret = LBER_SBIOD_READ_NEXT( p->sbiod, buf, len );
1217 BIO_clear_retry_flags( b );
1219 int err = sock_errno();
1220 if ( err == EAGAIN || err == EWOULDBLOCK ) {
1221 BIO_set_retry_read( b );
1229 sb_tls_bio_write( BIO *b, const char *buf, int len )
1234 if ( buf == NULL || len <= 0 ) return 0;
1236 p = (struct tls_data *)b->ptr;
1238 if ( p == NULL || p->sbiod == NULL ) {
1242 ret = LBER_SBIOD_WRITE_NEXT( p->sbiod, (char *)buf, len );
1244 BIO_clear_retry_flags( b );
1246 int err = sock_errno();
1247 if ( err == EAGAIN || err == EWOULDBLOCK ) {
1248 BIO_set_retry_write( b );
1256 sb_tls_bio_ctrl( BIO *b, int cmd, long num, void *ptr )
1258 if ( cmd == BIO_CTRL_FLUSH ) {
1259 /* The OpenSSL library needs this */
1266 sb_tls_bio_gets( BIO *b, char *buf, int len )
1272 sb_tls_bio_puts( BIO *b, const char *str )
1274 return sb_tls_bio_write( b, str, strlen( str ) );
1277 static BIO_METHOD sb_tls_bio_method =
1279 ( 100 | 0x400 ), /* it's a source/sink BIO */
1291 sb_tls_setup( Sockbuf_IO_Desc *sbiod, void *arg )
1296 assert( sbiod != NULL );
1298 p = LBER_MALLOC( sizeof( *p ) );
1303 p->ssl = (SSL *)arg;
1305 bio = BIO_new( &sb_tls_bio_method );
1306 bio->ptr = (void *)p;
1307 SSL_set_bio( p->ssl, bio, bio );
1308 sbiod->sbiod_pvt = p;
1313 sb_tls_remove( Sockbuf_IO_Desc *sbiod )
1317 assert( sbiod != NULL );
1318 assert( sbiod->sbiod_pvt != NULL );
1320 p = (struct tls_data *)sbiod->sbiod_pvt;
1322 LBER_FREE( sbiod->sbiod_pvt );
1323 sbiod->sbiod_pvt = NULL;
1328 sb_tls_close( Sockbuf_IO_Desc *sbiod )
1332 assert( sbiod != NULL );
1333 assert( sbiod->sbiod_pvt != NULL );
1335 p = (struct tls_data *)sbiod->sbiod_pvt;
1336 SSL_shutdown( p->ssl );
1341 sb_tls_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
1345 assert( sbiod != NULL );
1346 assert( sbiod->sbiod_pvt != NULL );
1348 p = (struct tls_data *)sbiod->sbiod_pvt;
1350 if ( opt == LBER_SB_OPT_GET_SSL ) {
1351 *((SSL **)arg) = p->ssl;
1354 } else if ( opt == LBER_SB_OPT_DATA_READY ) {
1355 if( SSL_pending( p->ssl ) > 0 ) {
1360 return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
1364 sb_tls_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
1370 assert( sbiod != NULL );
1371 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
1373 p = (struct tls_data *)sbiod->sbiod_pvt;
1375 ret = SSL_read( p->ssl, (char *)buf, len );
1377 errno = WSAGetLastError();
1379 err = SSL_get_error( p->ssl, ret );
1380 if (err == SSL_ERROR_WANT_READ ) {
1381 sbiod->sbiod_sb->sb_trans_needs_read = 1;
1382 sock_errset(EWOULDBLOCK);
1385 sbiod->sbiod_sb->sb_trans_needs_read = 0;
1390 sb_tls_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
1396 assert( sbiod != NULL );
1397 assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
1399 p = (struct tls_data *)sbiod->sbiod_pvt;
1401 ret = SSL_write( p->ssl, (char *)buf, len );
1403 errno = WSAGetLastError();
1405 err = SSL_get_error( p->ssl, ret );
1406 if (err == SSL_ERROR_WANT_WRITE ) {
1407 sbiod->sbiod_sb->sb_trans_needs_write = 1;
1408 sock_errset(EWOULDBLOCK);
1411 sbiod->sbiod_sb->sb_trans_needs_write = 0;
1418 static Sockbuf_IO sb_tls_sbio =
1420 sb_tls_setup, /* sbi_setup */
1421 sb_tls_remove, /* sbi_remove */
1422 sb_tls_ctrl, /* sbi_ctrl */
1423 sb_tls_read, /* sbi_read */
1424 sb_tls_write, /* sbi_write */
1425 sb_tls_close /* sbi_close */
1429 /* Certs are not automatically varified during the handshake */
1431 tls_cert_verify( tls_session *ssl )
1433 unsigned int status = 0;
1435 time_t now = time(0);
1437 err = gnutls_certificate_verify_peers2( ssl->session, &status );
1439 Debug( LDAP_DEBUG_ANY,"TLS: gnutls_certificate_verify_peers2 failed %d\n",
1444 Debug( LDAP_DEBUG_TRACE,"TLS: peer cert untrusted or revoked (0x%x)\n",
1448 if ( gnutls_certificate_expiration_time_peers( ssl->session ) < now ) {
1449 Debug( LDAP_DEBUG_ANY, "TLS: peer certificate is expired\n",
1453 if ( gnutls_certificate_activation_time_peers( ssl->session ) > now ) {
1454 Debug( LDAP_DEBUG_ANY, "TLS: peer certificate not yet active\n",
1460 #endif /* HAVE_GNUTLS */
1463 * Call this to do a TLS connect on a sockbuf. ctx_arg can be
1464 * a SSL_CTX * or NULL, in which case the default ctx is used.
1468 * 0 - Success. Connection is ready for communication.
1469 * <0 - Error. Can't create a TLS stream.
1470 * >0 - Partial success.
1471 * Do a select (using information from lber_pvt_sb_needs_{read,write}
1476 ldap_int_tls_connect( LDAP *ld, LDAPConn *conn )
1478 Sockbuf *sb = conn->lconn_sb;
1482 if ( HAS_TLS( sb ) ) {
1483 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
1486 struct ldapoptions *lo;
1489 ctx = ld->ld_options.ldo_tls_ctx;
1491 ssl = alloc_handle( ctx, 0 );
1493 if ( ssl == NULL ) return -1;
1496 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
1497 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
1499 ber_sockbuf_add_io( sb, &sb_tls_sbio,
1500 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
1502 lo = LDAP_INT_GLOBAL_OPT();
1504 ctx = lo->ldo_tls_ctx;
1505 ld->ld_options.ldo_tls_ctx = ctx;
1508 if ( ld->ld_options.ldo_tls_connect_cb )
1509 ld->ld_options.ldo_tls_connect_cb( ld, ssl, ctx,
1510 ld->ld_options.ldo_tls_connect_arg );
1511 if ( lo && lo->ldo_tls_connect_cb && lo->ldo_tls_connect_cb !=
1512 ld->ld_options.ldo_tls_connect_cb )
1513 lo->ldo_tls_connect_cb( ld, ssl, ctx, lo->ldo_tls_connect_arg );
1516 err = tls_session_connect( ssl );
1519 errno = WSAGetLastError();
1528 if ( update_flags( sb, ssl, err )) {
1533 if ((err = ERR_peek_error()))
1536 if ( ld->ld_error ) {
1537 LDAP_FREE( ld->ld_error );
1540 ld->ld_error = LDAP_STRDUP(gnutls_strerror( err ));
1544 ld->ld_error = LDAP_STRDUP(ERR_error_string(err, buf));
1548 if ( ld->ld_error ) __etoa(ld->ld_error);
1552 Debug( LDAP_DEBUG_ANY,"TLS: can't connect: %s.\n",
1553 ld->ld_error ? ld->ld_error : "" ,0,0);
1555 ber_sockbuf_remove_io( sb, &sb_tls_sbio,
1556 LBER_SBIOD_LEVEL_TRANSPORT );
1558 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
1559 LBER_SBIOD_LEVEL_TRANSPORT );
1565 if ( ld->ld_options.ldo_tls_require_cert != LDAP_OPT_X_TLS_NEVER ) {
1566 err = tls_cert_verify( ssl );
1567 if ( err && ld->ld_options.ldo_tls_require_cert != LDAP_OPT_X_TLS_ALLOW )
1576 * Call this to do a TLS accept on a sockbuf.
1577 * Everything else is the same as with tls_connect.
1580 ldap_pvt_tls_accept( Sockbuf *sb, void *ctx_arg )
1585 if ( HAS_TLS( sb ) ) {
1586 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
1589 ssl = alloc_handle( ctx_arg, 1 );
1590 if ( ssl == NULL ) return -1;
1593 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
1594 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
1596 ber_sockbuf_add_io( sb, &sb_tls_sbio,
1597 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
1600 err = tls_session_accept( ssl );
1603 errno = WSAGetLastError();
1612 if ( update_flags( sb, ssl, err )) return 1;
1615 Debug( LDAP_DEBUG_ANY,"TLS: can't accept: %s.\n",
1616 gnutls_strerror( err ),0,0 );
1618 Debug( LDAP_DEBUG_ANY,"TLS: can't accept.\n",0,0,0 );
1621 ber_sockbuf_remove_io( sb, &sb_tls_sbio,
1622 LBER_SBIOD_LEVEL_TRANSPORT );
1624 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
1625 LBER_SBIOD_LEVEL_TRANSPORT );
1631 if ( ssl->ctx->lo->ldo_tls_require_cert != LDAP_OPT_X_TLS_NEVER ) {
1632 err = tls_cert_verify( ssl );
1633 if ( err && ssl->ctx->lo->ldo_tls_require_cert != LDAP_OPT_X_TLS_ALLOW )
1641 ldap_pvt_tls_inplace ( Sockbuf *sb )
1643 return HAS_TLS( sb ) ? 1 : 0;
1647 ldap_tls_inplace( LDAP *ld )
1651 if ( ld->ld_defconn && ld->ld_defconn->lconn_sb ) {
1652 sb = ld->ld_defconn->lconn_sb;
1654 } else if ( ld->ld_sb ) {
1661 return ldap_pvt_tls_inplace( sb );
1666 x509_cert_get_dn( struct berval *cert, struct berval *dn, int get_subject )
1668 BerElementBuffer berbuf;
1669 BerElement *ber = (BerElement *)&berbuf;
1674 ber_init2( ber, cert, LBER_USE_DER );
1675 tag = ber_skip_tag( ber, &len ); /* Sequence */
1676 tag = ber_skip_tag( ber, &len ); /* Sequence */
1677 tag = ber_skip_tag( ber, &len ); /* Context + Constructed (version) */
1678 if ( tag == 0xa0 ) /* Version is optional */
1679 tag = ber_get_int( ber, &i ); /* Int: Version */
1680 tag = ber_get_int( ber, &i ); /* Int: Serial */
1681 tag = ber_skip_tag( ber, &len ); /* Sequence: Signature */
1682 ber_skip_data( ber, len );
1683 if ( !get_subject ) {
1684 tag = ber_peek_tag( ber, &len ); /* Sequence: Issuer DN */
1686 tag = ber_skip_tag( ber, &len );
1687 ber_skip_data( ber, len );
1688 tag = ber_skip_tag( ber, &len ); /* Sequence: Validity */
1689 ber_skip_data( ber, len );
1690 tag = ber_peek_tag( ber, &len ); /* Sequence: Subject DN */
1692 len = ber_ptrlen( ber );
1693 dn->bv_val = cert->bv_val + len;
1694 dn->bv_len = cert->bv_len - len;
1698 tls_get_cert_dn( tls_session *session, struct berval *dnbv )
1700 if ( !session->peer_der_dn.bv_val ) {
1701 const gnutls_datum_t *peer_cert_list;
1705 peer_cert_list = gnutls_certificate_get_peers( session->session,
1707 if ( !peer_cert_list ) return LDAP_INVALID_CREDENTIALS;
1709 bv.bv_len = peer_cert_list->size;
1710 bv.bv_val = peer_cert_list->data;
1712 x509_cert_get_dn( &bv, &session->peer_der_dn, 1 );
1713 *dnbv = session->peer_der_dn;
1717 #else /* !HAVE_GNUTLS */
1719 tls_get_cert( SSL *s )
1721 /* If peer cert was bad, treat as if no cert was given */
1722 if (SSL_get_verify_result(s)) {
1723 /* If we can send an alert, do so */
1724 if (SSL_version(s) != SSL2_VERSION) {
1725 ssl3_send_alert(s,SSL3_AL_WARNING,SSL3_AD_BAD_CERTIFICATE);
1729 return SSL_get_peer_certificate(s);
1733 tls_get_cert_dn( tls_session *session, struct berval *dnbv )
1736 X509 *x = tls_get_cert( session );
1739 return LDAP_INVALID_CREDENTIALS;
1741 xn = X509_get_subject_name(x);
1742 dnbv->bv_len = i2d_X509_NAME( xn, NULL );
1743 dnbv->bv_val = xn->bytes->data;
1747 #endif /* HAVE_GNUTLS */
1750 ldap_pvt_tls_get_peer_dn( void *s, struct berval *dn,
1751 LDAPDN_rewrite_dummy *func, unsigned flags )
1753 tls_session *session = s;
1757 rc = tls_get_cert_dn( session, &bvdn );
1758 if ( rc ) return rc;
1760 rc = ldap_X509dn2bv( &bvdn, dn,
1761 (LDAPDN_rewrite_func *)func, flags);
1765 /* what kind of hostname were we given? */
1773 ldap_pvt_tls_check_hostname( LDAP *ld, void *s, const char *name_in )
1775 tls_session *session = s;
1777 const gnutls_datum_t *peer_cert_list;
1780 char altname[NI_MAXHOST];
1783 gnutls_x509_crt_t cert;
1787 char *domain = NULL;
1788 #ifdef LDAP_PF_INET6
1789 struct in6_addr addr;
1791 struct in_addr addr;
1793 int n, len1 = 0, len2 = 0;
1795 time_t now = time(0);
1797 if( ldap_int_hostname &&
1798 ( !name_in || !strcasecmp( name_in, "localhost" ) ) )
1800 name = ldap_int_hostname;
1805 peer_cert_list = gnutls_certificate_get_peers( session->session,
1807 if ( !peer_cert_list ) {
1808 Debug( LDAP_DEBUG_ANY,
1809 "TLS: unable to get peer certificate.\n",
1811 /* If this was a fatal condition, things would have
1812 * aborted long before now.
1814 return LDAP_SUCCESS;
1816 ret = gnutls_x509_crt_init( &cert );
1818 return LDAP_LOCAL_ERROR;
1819 ret = gnutls_x509_crt_import( cert, peer_cert_list, GNUTLS_X509_FMT_DER );
1821 gnutls_x509_crt_deinit( cert );
1822 return LDAP_LOCAL_ERROR;
1825 #ifdef LDAP_PF_INET6
1826 if (name[0] == '[' && strchr(name, ']')) {
1827 char *n2 = ldap_strdup(name+1);
1828 *strchr(n2, ']') = 2;
1829 if (inet_pton(AF_INET6, n2, &addr))
1834 if ((ptr = strrchr(name, '.')) && isdigit((unsigned char)ptr[1])) {
1835 if (inet_aton(name, (struct in_addr *)&addr)) ntype = IS_IP4;
1838 if (ntype == IS_DNS) {
1839 len1 = strlen(name);
1840 domain = strchr(name, '.');
1842 len2 = len1 - (domain-name);
1846 for ( i=0, ret=0; ret >= 0; i++ ) {
1847 altnamesize = sizeof(altname);
1848 ret = gnutls_x509_crt_get_subject_alt_name( cert, i,
1849 altname, &altnamesize, NULL );
1850 if ( ret < 0 ) break;
1853 if ( altnamesize == 0 ) continue;
1855 if ( ret == GNUTLS_SAN_DNSNAME ) {
1856 if (ntype != IS_DNS) continue;
1858 /* Is this an exact match? */
1859 if ((len1 == altnamesize) && !strncasecmp(name, altname, len1)) {
1863 /* Is this a wildcard match? */
1864 if (domain && (altname[0] == '*') && (altname[1] == '.') &&
1865 (len2 == altnamesize-1) && !strncasecmp(domain, &altname[1], len2))
1869 } else if ( ret == GNUTLS_SAN_IPADDRESS ) {
1870 if (ntype == IS_DNS) continue;
1872 #ifdef LDAP_PF_INET6
1873 if (ntype == IS_IP6 && altnamesize != sizeof(struct in6_addr)) {
1877 if (ntype == IS_IP4 && altnamesize != sizeof(struct in_addr)) {
1880 if (!memcmp(altname, &addr, altnamesize)) {
1888 altnamesize = sizeof(altname);
1889 ret = gnutls_x509_crt_get_dn_by_oid( cert, CN_OID,
1890 0, 0, altname, &altnamesize );
1892 Debug( LDAP_DEBUG_ANY,
1893 "TLS: unable to get common name from peer certificate.\n",
1895 ret = LDAP_CONNECT_ERROR;
1896 if ( ld->ld_error ) {
1897 LDAP_FREE( ld->ld_error );
1899 ld->ld_error = LDAP_STRDUP(
1900 _("TLS: unable to get CN from peer certificate"));
1903 ret = LDAP_LOCAL_ERROR;
1904 if ( !len1 ) len1 = strlen( name );
1905 if ( len1 == altnamesize && strncasecmp(name, altname, altnamesize) == 0 ) {
1908 } else if (( altname[0] == '*' ) && ( altname[1] == '.' )) {
1909 /* Is this a wildcard match? */
1911 (len2 == altnamesize-1) && !strncasecmp(domain, &altname[1], len2)) {
1917 if( ret == LDAP_LOCAL_ERROR ) {
1918 altname[altnamesize] = '\0';
1919 Debug( LDAP_DEBUG_ANY, "TLS: hostname (%s) does not match "
1920 "common name in certificate (%s).\n",
1922 ret = LDAP_CONNECT_ERROR;
1923 if ( ld->ld_error ) {
1924 LDAP_FREE( ld->ld_error );
1926 ld->ld_error = LDAP_STRDUP(
1927 _("TLS: hostname does not match CN in peer certificate"));
1930 gnutls_x509_crt_deinit( cert );
1934 #else /* !HAVE_GNUTLS */
1937 ldap_pvt_tls_check_hostname( LDAP *ld, void *s, const char *name_in )
1939 int i, ret = LDAP_LOCAL_ERROR;
1944 #ifdef LDAP_PF_INET6
1945 struct in6_addr addr;
1947 struct in_addr addr;
1950 if( ldap_int_hostname &&
1951 ( !name_in || !strcasecmp( name_in, "localhost" ) ) )
1953 name = ldap_int_hostname;
1958 x = tls_get_cert((SSL *)s);
1960 Debug( LDAP_DEBUG_ANY,
1961 "TLS: unable to get peer certificate.\n",
1963 /* If this was a fatal condition, things would have
1964 * aborted long before now.
1966 return LDAP_SUCCESS;
1969 #ifdef LDAP_PF_INET6
1970 if (name[0] == '[' && strchr(name, ']')) {
1971 char *n2 = ldap_strdup(name+1);
1972 *strchr(n2, ']') = 2;
1973 if (inet_pton(AF_INET6, n2, &addr))
1978 if ((ptr = strrchr(name, '.')) && isdigit((unsigned char)ptr[1])) {
1979 if (inet_aton(name, (struct in_addr *)&addr)) ntype = IS_IP4;
1982 i = X509_get_ext_by_NID(x, NID_subject_alt_name, -1);
1985 STACK_OF(GENERAL_NAME) *alt;
1987 ex = X509_get_ext(x, i);
1988 alt = X509V3_EXT_d2i(ex);
1990 int n, len1 = 0, len2 = 0;
1991 char *domain = NULL;
1994 if (ntype == IS_DNS) {
1995 len1 = strlen(name);
1996 domain = strchr(name, '.');
1998 len2 = len1 - (domain-name);
2001 n = sk_GENERAL_NAME_num(alt);
2002 for (i=0; i<n; i++) {
2005 gn = sk_GENERAL_NAME_value(alt, i);
2006 if (gn->type == GEN_DNS) {
2007 if (ntype != IS_DNS) continue;
2009 sn = (char *) ASN1_STRING_data(gn->d.ia5);
2010 sl = ASN1_STRING_length(gn->d.ia5);
2013 if (sl == 0) continue;
2015 /* Is this an exact match? */
2016 if ((len1 == sl) && !strncasecmp(name, sn, len1)) {
2020 /* Is this a wildcard match? */
2021 if (domain && (sn[0] == '*') && (sn[1] == '.') &&
2022 (len2 == sl-1) && !strncasecmp(domain, &sn[1], len2))
2027 } else if (gn->type == GEN_IPADD) {
2028 if (ntype == IS_DNS) continue;
2030 sn = (char *) ASN1_STRING_data(gn->d.ia5);
2031 sl = ASN1_STRING_length(gn->d.ia5);
2033 #ifdef LDAP_PF_INET6
2034 if (ntype == IS_IP6 && sl != sizeof(struct in6_addr)) {
2038 if (ntype == IS_IP4 && sl != sizeof(struct in_addr)) {
2041 if (!memcmp(sn, &addr, sl)) {
2047 GENERAL_NAMES_free(alt);
2048 if (i < n) { /* Found a match */
2054 if (ret != LDAP_SUCCESS) {
2059 xn = X509_get_subject_name(x);
2060 if( X509_NAME_get_text_by_NID( xn, NID_commonName,
2061 buf, sizeof(buf)) == -1)
2063 Debug( LDAP_DEBUG_ANY,
2064 "TLS: unable to get common name from peer certificate.\n",
2066 ret = LDAP_CONNECT_ERROR;
2067 if ( ld->ld_error ) {
2068 LDAP_FREE( ld->ld_error );
2070 ld->ld_error = LDAP_STRDUP(
2071 _("TLS: unable to get CN from peer certificate"));
2073 } else if (strcasecmp(name, buf) == 0 ) {
2076 } else if (( buf[0] == '*' ) && ( buf[1] == '.' )) {
2077 char *domain = strchr(name, '.');
2083 dlen = sl - (domain-name);
2086 /* Is this a wildcard match? */
2087 if ((dlen == sl-1) && !strncasecmp(domain, &buf[1], dlen)) {
2093 if( ret == LDAP_LOCAL_ERROR ) {
2094 Debug( LDAP_DEBUG_ANY, "TLS: hostname (%s) does not match "
2095 "common name in certificate (%s).\n",
2097 ret = LDAP_CONNECT_ERROR;
2098 if ( ld->ld_error ) {
2099 LDAP_FREE( ld->ld_error );
2101 ld->ld_error = LDAP_STRDUP(
2102 _("TLS: hostname does not match CN in peer certificate"));
2111 ldap_int_tls_config( LDAP *ld, int option, const char *arg )
2116 case LDAP_OPT_X_TLS_CACERTFILE:
2117 case LDAP_OPT_X_TLS_CACERTDIR:
2118 case LDAP_OPT_X_TLS_CERTFILE:
2119 case LDAP_OPT_X_TLS_KEYFILE:
2120 case LDAP_OPT_X_TLS_RANDOM_FILE:
2121 case LDAP_OPT_X_TLS_CIPHER_SUITE:
2122 case LDAP_OPT_X_TLS_DHFILE:
2124 case LDAP_OPT_X_TLS_CRLFILE:
2126 return ldap_pvt_tls_set_option( ld, option, (void *) arg );
2128 case LDAP_OPT_X_TLS_REQUIRE_CERT:
2129 case LDAP_OPT_X_TLS:
2131 if ( strcasecmp( arg, "never" ) == 0 ) {
2132 i = LDAP_OPT_X_TLS_NEVER ;
2134 } else if ( strcasecmp( arg, "demand" ) == 0 ) {
2135 i = LDAP_OPT_X_TLS_DEMAND ;
2137 } else if ( strcasecmp( arg, "allow" ) == 0 ) {
2138 i = LDAP_OPT_X_TLS_ALLOW ;
2140 } else if ( strcasecmp( arg, "try" ) == 0 ) {
2141 i = LDAP_OPT_X_TLS_TRY ;
2143 } else if ( ( strcasecmp( arg, "hard" ) == 0 ) ||
2144 ( strcasecmp( arg, "on" ) == 0 ) ||
2145 ( strcasecmp( arg, "yes" ) == 0) ||
2146 ( strcasecmp( arg, "true" ) == 0 ) )
2148 i = LDAP_OPT_X_TLS_HARD ;
2152 return ldap_pvt_tls_set_option( ld, option, &i );
2155 case LDAP_OPT_X_TLS_PROTOCOL_MIN: {
2158 l = strtol( arg, &next, 10 );
2159 if ( l < 0 || l > 0xff || next == arg ||
2160 ( *next != '\0' && *next != '.' ) )
2165 l = strtol( arg, &next, 10 );
2166 if ( l < 0 || l > 0xff || next == arg || *next != '\0' )
2170 return ldap_pvt_tls_set_option( ld, option, &i );
2172 #ifdef HAVE_OPENSSL_CRL
2173 case LDAP_OPT_X_TLS_CRLCHECK:
2175 if ( strcasecmp( arg, "none" ) == 0 ) {
2176 i = LDAP_OPT_X_TLS_CRL_NONE ;
2177 } else if ( strcasecmp( arg, "peer" ) == 0 ) {
2178 i = LDAP_OPT_X_TLS_CRL_PEER ;
2179 } else if ( strcasecmp( arg, "all" ) == 0 ) {
2180 i = LDAP_OPT_X_TLS_CRL_ALL ;
2183 return ldap_pvt_tls_set_option( ld, option, &i );
2192 ldap_pvt_tls_get_option( LDAP *ld, int option, void *arg )
2194 struct ldapoptions *lo;
2197 assert( LDAP_VALID( ld ) );
2199 if( !LDAP_VALID( ld ) ) {
2200 return LDAP_OPT_ERROR;
2203 lo = &ld->ld_options;
2206 /* Get pointer to global option structure */
2207 lo = LDAP_INT_GLOBAL_OPT();
2209 return LDAP_NO_MEMORY;
2214 case LDAP_OPT_X_TLS:
2215 *(int *)arg = lo->ldo_tls_mode;
2217 case LDAP_OPT_X_TLS_CTX:
2218 *(void **)arg = lo->ldo_tls_ctx;
2219 if ( lo->ldo_tls_ctx ) {
2220 tls_ctx_ref( lo->ldo_tls_ctx );
2223 case LDAP_OPT_X_TLS_CACERTFILE:
2224 *(char **)arg = lo->ldo_tls_cacertfile ?
2225 LDAP_STRDUP( lo->ldo_tls_cacertfile ) : NULL;
2227 case LDAP_OPT_X_TLS_CACERTDIR:
2228 *(char **)arg = lo->ldo_tls_cacertdir ?
2229 LDAP_STRDUP( lo->ldo_tls_cacertdir ) : NULL;
2231 case LDAP_OPT_X_TLS_CERTFILE:
2232 *(char **)arg = lo->ldo_tls_certfile ?
2233 LDAP_STRDUP( lo->ldo_tls_certfile ) : NULL;
2235 case LDAP_OPT_X_TLS_KEYFILE:
2236 *(char **)arg = lo->ldo_tls_keyfile ?
2237 LDAP_STRDUP( lo->ldo_tls_keyfile ) : NULL;
2239 case LDAP_OPT_X_TLS_DHFILE:
2240 *(char **)arg = lo->ldo_tls_dhfile ?
2241 LDAP_STRDUP( lo->ldo_tls_dhfile ) : NULL;
2244 case LDAP_OPT_X_TLS_CRLFILE:
2245 *(char **)arg = lo->ldo_tls_crlfile ?
2246 LDAP_STRDUP( lo->ldo_tls_crlfile ) : NULL;
2249 case LDAP_OPT_X_TLS_REQUIRE_CERT:
2250 *(int *)arg = lo->ldo_tls_require_cert;
2252 #ifdef HAVE_OPENSSL_CRL
2253 case LDAP_OPT_X_TLS_CRLCHECK:
2254 *(int *)arg = lo->ldo_tls_crlcheck;
2257 case LDAP_OPT_X_TLS_CIPHER_SUITE:
2258 *(char **)arg = lo->ldo_tls_ciphersuite ?
2259 LDAP_STRDUP( lo->ldo_tls_ciphersuite ) : NULL;
2261 case LDAP_OPT_X_TLS_PROTOCOL_MIN:
2262 *(int *)arg = lo->ldo_tls_protocol_min;
2264 case LDAP_OPT_X_TLS_RANDOM_FILE:
2266 *(char **)arg = tls_opt_randfile ?
2267 LDAP_STRDUP( tls_opt_randfile ) : NULL;
2269 *(char **)arg = NULL;
2272 case LDAP_OPT_X_TLS_SSL_CTX: {
2275 LDAPConn *conn = ld->ld_defconn;
2276 if ( conn != NULL ) {
2277 Sockbuf *sb = conn->lconn_sb;
2278 retval = ldap_pvt_tls_sb_ctx( sb );
2281 *(void **)arg = retval;
2284 case LDAP_OPT_X_TLS_CONNECT_CB:
2285 *(LDAP_TLS_CONNECT_CB **)arg = lo->ldo_tls_connect_cb;
2287 case LDAP_OPT_X_TLS_CONNECT_ARG:
2288 *(void **)arg = lo->ldo_tls_connect_arg;
2297 ldap_pvt_tls_set_option( LDAP *ld, int option, void *arg )
2299 struct ldapoptions *lo;
2302 assert( LDAP_VALID( ld ) );
2304 if( !LDAP_VALID( ld ) ) {
2305 return LDAP_OPT_ERROR;
2308 lo = &ld->ld_options;
2311 /* Get pointer to global option structure */
2312 lo = LDAP_INT_GLOBAL_OPT();
2314 return LDAP_NO_MEMORY;
2319 case LDAP_OPT_X_TLS:
2320 if ( !arg ) return -1;
2322 switch( *(int *) arg ) {
2323 case LDAP_OPT_X_TLS_NEVER:
2324 case LDAP_OPT_X_TLS_DEMAND:
2325 case LDAP_OPT_X_TLS_ALLOW:
2326 case LDAP_OPT_X_TLS_TRY:
2327 case LDAP_OPT_X_TLS_HARD:
2329 lo->ldo_tls_mode = *(int *)arg;
2336 case LDAP_OPT_X_TLS_CTX:
2337 if ( lo->ldo_tls_ctx )
2338 ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx );
2339 lo->ldo_tls_ctx = arg;
2340 tls_ctx_ref( lo->ldo_tls_ctx );
2342 case LDAP_OPT_X_TLS_CONNECT_CB:
2343 lo->ldo_tls_connect_cb = (LDAP_TLS_CONNECT_CB *)arg;
2345 case LDAP_OPT_X_TLS_CONNECT_ARG:
2346 lo->ldo_tls_connect_arg = arg;
2348 case LDAP_OPT_X_TLS_CACERTFILE:
2349 if ( lo->ldo_tls_cacertfile ) LDAP_FREE( lo->ldo_tls_cacertfile );
2350 lo->ldo_tls_cacertfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
2352 case LDAP_OPT_X_TLS_CACERTDIR:
2353 if ( lo->ldo_tls_cacertdir ) LDAP_FREE( lo->ldo_tls_cacertdir );
2354 lo->ldo_tls_cacertdir = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
2356 case LDAP_OPT_X_TLS_CERTFILE:
2357 if ( lo->ldo_tls_certfile ) LDAP_FREE( lo->ldo_tls_certfile );
2358 lo->ldo_tls_certfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
2360 case LDAP_OPT_X_TLS_KEYFILE:
2361 if ( lo->ldo_tls_keyfile ) LDAP_FREE( lo->ldo_tls_keyfile );
2362 lo->ldo_tls_keyfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
2364 case LDAP_OPT_X_TLS_DHFILE:
2365 if ( lo->ldo_tls_dhfile ) LDAP_FREE( lo->ldo_tls_dhfile );
2366 lo->ldo_tls_dhfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
2369 case LDAP_OPT_X_TLS_CRLFILE:
2370 if ( lo->ldo_tls_crlfile ) LDAP_FREE( lo->ldo_tls_crlfile );
2371 lo->ldo_tls_crlfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
2374 case LDAP_OPT_X_TLS_REQUIRE_CERT:
2375 if ( !arg ) return -1;
2376 switch( *(int *) arg ) {
2377 case LDAP_OPT_X_TLS_NEVER:
2378 case LDAP_OPT_X_TLS_DEMAND:
2379 case LDAP_OPT_X_TLS_ALLOW:
2380 case LDAP_OPT_X_TLS_TRY:
2381 case LDAP_OPT_X_TLS_HARD:
2382 lo->ldo_tls_require_cert = * (int *) arg;
2386 #ifdef HAVE_OPENSSL_CRL
2387 case LDAP_OPT_X_TLS_CRLCHECK:
2388 if ( !arg ) return -1;
2389 switch( *(int *) arg ) {
2390 case LDAP_OPT_X_TLS_CRL_NONE:
2391 case LDAP_OPT_X_TLS_CRL_PEER:
2392 case LDAP_OPT_X_TLS_CRL_ALL:
2393 lo->ldo_tls_crlcheck = * (int *) arg;
2398 case LDAP_OPT_X_TLS_CIPHER_SUITE:
2399 if ( lo->ldo_tls_ciphersuite ) LDAP_FREE( lo->ldo_tls_ciphersuite );
2400 lo->ldo_tls_ciphersuite = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
2402 case LDAP_OPT_X_TLS_PROTOCOL_MIN:
2403 if ( !arg ) return -1;
2404 lo->ldo_tls_protocol_min = * (int *) arg;
2406 case LDAP_OPT_X_TLS_RANDOM_FILE:
2410 if (tls_opt_randfile ) LDAP_FREE (tls_opt_randfile );
2411 tls_opt_randfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
2415 case LDAP_OPT_X_TLS_NEWCTX:
2416 if ( !arg ) return -1;
2417 if ( lo->ldo_tls_ctx )
2418 ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx );
2419 lo->ldo_tls_ctx = NULL;
2420 return ldap_int_tls_init_ctx( lo, *(int *)arg );
2428 ldap_int_tls_start ( LDAP *ld, LDAPConn *conn, LDAPURLDesc *srv )
2430 Sockbuf *sb = conn->lconn_sb;
2435 host = srv->lud_host;
2437 host = conn->lconn_server->lud_host;
2440 /* avoid NULL host */
2441 if( host == NULL ) {
2445 (void) ldap_pvt_tls_init();
2448 * Fortunately, the lib uses blocking io...
2450 if ( ldap_int_tls_connect( ld, conn ) < 0 ) {
2451 ld->ld_errno = LDAP_CONNECT_ERROR;
2452 return (ld->ld_errno);
2455 ssl = ldap_pvt_tls_sb_ctx( sb );
2456 assert( ssl != NULL );
2459 * compare host with name(s) in certificate
2461 if (ld->ld_options.ldo_tls_require_cert != LDAP_OPT_X_TLS_NEVER) {
2462 ld->ld_errno = ldap_pvt_tls_check_hostname( ld, ssl, host );
2463 if (ld->ld_errno != LDAP_SUCCESS) {
2464 return ld->ld_errno;
2468 return LDAP_SUCCESS;
2472 /* Derived from openssl/apps/s_cb.c */
2474 tls_info_cb( const SSL *ssl, int where, int ret )
2478 char *state = (char *) SSL_state_string_long( (SSL *)ssl );
2480 w = where & ~SSL_ST_MASK;
2481 if ( w & SSL_ST_CONNECT ) {
2483 } else if ( w & SSL_ST_ACCEPT ) {
2491 state = LDAP_STRDUP( state );
2495 if ( where & SSL_CB_LOOP ) {
2496 Debug( LDAP_DEBUG_TRACE,
2497 "TLS trace: %s:%s\n",
2500 } else if ( where & SSL_CB_ALERT ) {
2501 char *atype = (char *) SSL_alert_type_string_long( ret );
2502 char *adesc = (char *) SSL_alert_desc_string_long( ret );
2503 op = ( where & SSL_CB_READ ) ? "read" : "write";
2506 atype = LDAP_STRDUP( atype );
2510 adesc = LDAP_STRDUP( adesc );
2514 Debug( LDAP_DEBUG_TRACE,
2515 "TLS trace: SSL3 alert %s:%s:%s\n",
2518 if ( atype ) LDAP_FREE( atype );
2519 if ( adesc ) LDAP_FREE( adesc );
2521 } else if ( where & SSL_CB_EXIT ) {
2523 Debug( LDAP_DEBUG_TRACE,
2524 "TLS trace: %s:failed in %s\n",
2526 } else if ( ret < 0 ) {
2527 Debug( LDAP_DEBUG_TRACE,
2528 "TLS trace: %s:error in %s\n",
2533 if ( state ) LDAP_FREE( state );
2538 tls_verify_cb( int ok, X509_STORE_CTX *ctx )
2547 char *certerr = NULL;
2549 cert = X509_STORE_CTX_get_current_cert( ctx );
2550 errnum = X509_STORE_CTX_get_error( ctx );
2551 errdepth = X509_STORE_CTX_get_error_depth( ctx );
2554 * X509_get_*_name return pointers to the internal copies of
2555 * those things requested. So do not free them.
2557 subject = X509_get_subject_name( cert );
2558 issuer = X509_get_issuer_name( cert );
2559 /* X509_NAME_oneline, if passed a NULL buf, allocate memomry */
2560 sname = X509_NAME_oneline( subject, NULL, 0 );
2561 iname = X509_NAME_oneline( issuer, NULL, 0 );
2562 if ( !ok ) certerr = (char *)X509_verify_cert_error_string( errnum );
2564 if ( sname ) __etoa( sname );
2565 if ( iname ) __etoa( iname );
2567 certerr = LDAP_STRDUP( certerr );
2571 Debug( LDAP_DEBUG_TRACE,
2572 "TLS certificate verification: depth: %d, err: %d, subject: %s,",
2574 sname ? sname : "-unknown-" );
2575 Debug( LDAP_DEBUG_TRACE, " issuer: %s\n", iname ? iname : "-unknown-", 0, 0 );
2577 Debug( LDAP_DEBUG_ANY,
2578 "TLS certificate verification: Error, %s\n",
2582 CRYPTO_free ( sname );
2584 CRYPTO_free ( iname );
2586 if ( certerr ) LDAP_FREE( certerr );
2592 tls_verify_ok( int ok, X509_STORE_CTX *ctx )
2594 (void) tls_verify_cb( ok, ctx );
2598 /* Inspired by ERR_print_errors in OpenSSL */
2600 tls_report_error( void )
2607 while ( ( l = ERR_get_error_line( &file, &line ) ) != 0 ) {
2608 ERR_error_string_n( l, buf, sizeof( buf ) );
2611 file = LDAP_STRDUP( file );
2612 __etoa( (char *)file );
2616 Debug( LDAP_DEBUG_ANY, "TLS: %s %s:%d\n",
2619 if ( file ) LDAP_FREE( (void *)file );
2625 tls_tmp_rsa_cb( SSL *ssl, int is_export, int key_length )
2629 /* FIXME: Pregenerate the key on startup */
2630 /* FIXME: Who frees the key? */
2631 tmp_rsa = RSA_generate_key( key_length, RSA_F4, NULL, NULL );
2634 Debug( LDAP_DEBUG_ANY,
2635 "TLS: Failed to generate temporary %d-bit %s RSA key\n",
2636 key_length, is_export ? "export" : "domestic", 0 );
2643 tls_seed_PRNG( const char *randfile )
2645 #ifndef URANDOM_DEVICE
2646 /* no /dev/urandom (or equiv) */
2648 char buffer[MAXPATHLEN];
2650 if (randfile == NULL) {
2651 /* The seed file is $RANDFILE if defined, otherwise $HOME/.rnd.
2652 * If $HOME is not set or buffer too small to hold the pathname,
2653 * an error occurs. - From RAND_file_name() man page.
2654 * The fact is that when $HOME is NULL, .rnd is used.
2656 randfile = RAND_file_name( buffer, sizeof( buffer ) );
2658 } else if (RAND_egd(randfile) > 0) {
2663 if (randfile == NULL) {
2664 Debug( LDAP_DEBUG_ANY,
2665 "TLS: Use configuration file or $RANDFILE to define seed PRNG\n",
2670 total = RAND_load_file(randfile, -1);
2672 if (RAND_status() == 0) {
2673 Debug( LDAP_DEBUG_ANY,
2674 "TLS: PRNG not been seeded with enough data\n",
2679 /* assume if there was enough bits to seed that it's okay
2680 * to write derived bits to the file
2682 RAND_write_file(randfile);
2696 /* From the OpenSSL 0.9.7 distro */
2697 static const char dhpem512[] =
2698 "-----BEGIN DH PARAMETERS-----\n\
2699 MEYCQQDaWDwW2YUiidDkr3VvTMqS3UvlM7gE+w/tlO+cikQD7VdGUNNpmdsp13Yn\n\
2700 a6LT1BLiGPTdHghM9tgAPnxHdOgzAgEC\n\
2701 -----END DH PARAMETERS-----\n";
2703 static const char dhpem1024[] =
2704 "-----BEGIN DH PARAMETERS-----\n\
2705 MIGHAoGBAJf2QmHKtQXdKCjhPx1ottPb0PMTBH9A6FbaWMsTuKG/K3g6TG1Z1fkq\n\
2706 /Gz/PWk/eLI9TzFgqVAuPvr3q14a1aZeVUMTgo2oO5/y2UHe6VaJ+trqCTat3xlx\n\
2707 /mNbIK9HA2RgPC3gWfVLZQrY+gz3ASHHR5nXWHEyvpuZm7m3h+irAgEC\n\
2708 -----END DH PARAMETERS-----\n";
2710 static const char dhpem2048[] =
2711 "-----BEGIN DH PARAMETERS-----\n\
2712 MIIBCAKCAQEA7ZKJNYJFVcs7+6J2WmkEYb8h86tT0s0h2v94GRFS8Q7B4lW9aG9o\n\
2713 AFO5Imov5Jo0H2XMWTKKvbHbSe3fpxJmw/0hBHAY8H/W91hRGXKCeyKpNBgdL8sh\n\
2714 z22SrkO2qCnHJ6PLAMXy5fsKpFmFor2tRfCzrfnggTXu2YOzzK7q62bmqVdmufEo\n\
2715 pT8igNcLpvZxk5uBDvhakObMym9mX3rAEBoe8PwttggMYiiw7NuJKO4MqD1llGkW\n\
2716 aVM8U2ATsCun1IKHrRxynkE1/MJ86VHeYYX8GZt2YA8z+GuzylIOKcMH6JAWzMwA\n\
2717 Gbatw6QwizOhr9iMjZ0B26TE3X8LvW84wwIBAg==\n\
2718 -----END DH PARAMETERS-----\n";
2720 static const char dhpem4096[] =
2721 "-----BEGIN DH PARAMETERS-----\n\
2722 MIICCAKCAgEA/urRnb6vkPYc/KEGXWnbCIOaKitq7ySIq9dTH7s+Ri59zs77zty7\n\
2723 vfVlSe6VFTBWgYjD2XKUFmtqq6CqXMhVX5ElUDoYDpAyTH85xqNFLzFC7nKrff/H\n\
2724 TFKNttp22cZE9V0IPpzedPfnQkE7aUdmF9JnDyv21Z/818O93u1B4r0szdnmEvEF\n\
2725 bKuIxEHX+bp0ZR7RqE1AeifXGJX3d6tsd2PMAObxwwsv55RGkn50vHO4QxtTARr1\n\
2726 rRUV5j3B3oPMgC7Offxx+98Xn45B1/G0Prp11anDsR1PGwtaCYipqsvMwQUSJtyE\n\
2727 EOQWk+yFkeMe4vWv367eEi0Sd/wnC+TSXBE3pYvpYerJ8n1MceI5GQTdarJ77OW9\n\
2728 bGTHmxRsLSCM1jpLdPja5jjb4siAa6EHc4qN9c/iFKS3PQPJEnX7pXKBRs5f7AF3\n\
2729 W3RIGt+G9IVNZfXaS7Z/iCpgzgvKCs0VeqN38QsJGtC1aIkwOeyjPNy2G6jJ4yqH\n\
2730 ovXYt/0mc00vCWeSNS1wren0pR2EiLxX0ypjjgsU1mk/Z3b/+zVf7fZSIB+nDLjb\n\
2731 NPtUlJCVGnAeBK1J1nG3TQicqowOXoM6ISkdaXj5GPJdXHab2+S7cqhKGv5qC7rR\n\
2732 jT6sx7RUr0CNTxzLI7muV2/a4tGmj0PSdXQdsZ7tw7gbXlaWT1+MM2MCAQI=\n\
2733 -----END DH PARAMETERS-----\n";
2735 static const struct dhinfo dhpem[] = {
2736 { 512, dhpem512, sizeof(dhpem512) },
2737 { 1024, dhpem1024, sizeof(dhpem1024) },
2738 { 2048, dhpem2048, sizeof(dhpem2048) },
2739 { 4096, dhpem4096, sizeof(dhpem4096) },
2744 tls_tmp_dh_cb( SSL *ssl, int is_export, int key_length )
2746 struct dhplist *p = NULL;
2751 /* Do we have params of this length already? */
2752 #ifdef LDAP_R_COMPILE
2753 ldap_pvt_thread_mutex_lock( &tls_def_ctx_mutex );
2755 for ( p = dhparams; p; p=p->next ) {
2756 if ( p->keylength == key_length ) {
2757 #ifdef LDAP_R_COMPILE
2758 ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
2764 /* No - check for hardcoded params */
2766 for (i=0; dhpem[i].keylength; i++) {
2767 if ( dhpem[i].keylength == key_length ) {
2768 b = BIO_new_mem_buf( (char *)dhpem[i].pem, dhpem[i].size );
2774 dh = PEM_read_bio_DHparams( b, NULL, NULL, NULL );
2778 /* Generating on the fly is expensive/slow... */
2780 dh = DH_generate_parameters( key_length, DH_GENERATOR_2, NULL, NULL );
2783 p = LDAP_MALLOC( sizeof(struct dhplist) );
2785 p->keylength = key_length;
2792 #ifdef LDAP_R_COMPILE
2793 ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
2799 #endif /* HAVE_OPENSSL */
2802 ldap_pvt_tls_sb_ctx( Sockbuf *sb )
2807 if (HAS_TLS( sb )) {
2808 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&p );
2817 ldap_pvt_tls_get_strength( void *s )
2822 c = SSL_get_current_cipher((SSL *)s);
2823 return SSL_CIPHER_get_bits(c, NULL);
2824 #elif defined(HAVE_GNUTLS)
2825 tls_session *session = s;
2826 gnutls_cipher_algorithm_t c;
2828 c = gnutls_cipher_get( session->session );
2829 return gnutls_cipher_get_key_size( c ) * 8;
2837 ldap_pvt_tls_get_my_dn( void *s, struct berval *dn, LDAPDN_rewrite_dummy *func, unsigned flags )
2840 struct berval der_dn;
2846 x = SSL_get_certificate((SSL *)s);
2848 if (!x) return LDAP_INVALID_CREDENTIALS;
2850 xn = X509_get_subject_name(x);
2851 der_dn.bv_len = i2d_X509_NAME( xn, NULL );
2852 der_dn.bv_val = xn->bytes->data;
2853 #elif defined(HAVE_GNUTLS)
2854 tls_session *session = s;
2855 const gnutls_datum_t *x;
2858 x = gnutls_certificate_get_ours( session->session );
2860 if (!x) return LDAP_INVALID_CREDENTIALS;
2862 bv.bv_val = x->data;
2863 bv.bv_len = x->size;
2865 x509_cert_get_dn( &bv, &der_dn, 1 );
2867 rc = ldap_X509dn2bv(&der_dn, dn, (LDAPDN_rewrite_func *)func, flags );
2869 #else /* !HAVE_TLS */
2870 return LDAP_NOT_SUPPORTED;
2875 ldap_start_tls( LDAP *ld,
2876 LDAPControl **serverctrls,
2877 LDAPControl **clientctrls,
2880 return ldap_extended_operation( ld, LDAP_EXOP_START_TLS,
2881 NULL, serverctrls, clientctrls, msgidp );
2885 ldap_install_tls( LDAP *ld )
2888 return LDAP_NOT_SUPPORTED;
2890 if ( ldap_tls_inplace( ld ) ) {
2891 return LDAP_LOCAL_ERROR;
2894 return ldap_int_tls_start( ld, ld->ld_defconn, NULL );
2899 ldap_start_tls_s ( LDAP *ld,
2900 LDAPControl **serverctrls,
2901 LDAPControl **clientctrls )
2904 return LDAP_NOT_SUPPORTED;
2907 char *rspoid = NULL;
2908 struct berval *rspdata = NULL;
2910 /* XXYYZ: this initiates operation only on default connection! */
2912 if ( ldap_tls_inplace( ld ) ) {
2913 return LDAP_LOCAL_ERROR;
2916 rc = ldap_extended_operation_s( ld, LDAP_EXOP_START_TLS,
2917 NULL, serverctrls, clientctrls, &rspoid, &rspdata );
2919 if ( rspoid != NULL ) {
2923 if ( rspdata != NULL ) {
2924 ber_bvfree( rspdata );
2927 if ( rc == LDAP_SUCCESS ) {
2928 rc = ldap_int_tls_start( ld, ld->ld_defconn, NULL );
2935 /* These tags probably all belong in lber.h, but they're
2936 * not normally encountered when processing LDAP, so maybe
2937 * they belong somewhere else instead.
2940 #define LBER_TAG_OID ((ber_tag_t) 0x06UL)
2942 /* Tags for string types used in a DirectoryString.
2944 * Note that IA5string is not one of the defined choices for
2945 * DirectoryString in X.520, but it gets used for email AVAs.
2947 #define LBER_TAG_UTF8 ((ber_tag_t) 0x0cUL)
2948 #define LBER_TAG_PRINTABLE ((ber_tag_t) 0x13UL)
2949 #define LBER_TAG_TELETEX ((ber_tag_t) 0x14UL)
2950 #define LBER_TAG_IA5 ((ber_tag_t) 0x16UL)
2951 #define LBER_TAG_UNIVERSAL ((ber_tag_t) 0x1cUL)
2952 #define LBER_TAG_BMP ((ber_tag_t) 0x1eUL)
2955 find_oid( struct berval *oid )
2959 for ( i=0; !BER_BVISNULL( &oids[i].oid ); i++ ) {
2960 if ( oids[i].oid.bv_len != oid->bv_len ) continue;
2961 if ( !strcmp( oids[i].oid.bv_val, oid->bv_val ))
2967 /* Convert a structured DN from an X.509 certificate into an LDAPV3 DN.
2968 * x509_name must be raw DER. If func is non-NULL, the
2969 * constructed DN will use numeric OIDs to identify attributeTypes,
2970 * and the func() will be invoked to rewrite the DN with the given
2973 * Otherwise the DN will use shortNames from a hardcoded table.
2976 ldap_X509dn2bv( void *x509_name, struct berval *bv, LDAPDN_rewrite_func *func,
2981 LDAPAVA *newAVA, *baseAVA;
2982 BerElementBuffer berbuf;
2983 BerElement *ber = (BerElement *)&berbuf;
2984 char oids[8192], *oidptr = oids, *oidbuf = NULL;
2986 char *dn_end, *rdn_end;
2987 int i, navas, nrdns, rc = LDAP_SUCCESS;
2988 size_t dnsize, oidrem = sizeof(oids), oidsize = 0;
2994 struct berval Oid, Val, oid2, *in = x509_name;
2996 assert( bv != NULL );
3004 /* A DN is a SEQUENCE of RDNs. An RDN is a SET of AVAs.
3005 * An AVA is a SEQUENCE of attr and value.
3006 * Count the number of AVAs and RDNs
3008 ber_init2( ber, in, LBER_USE_DER );
3009 tag = ber_peek_tag( ber, &len );
3010 if ( tag != LBER_SEQUENCE )
3011 return LDAP_DECODING_ERROR;
3013 for ( tag = ber_first_element( ber, &len, &dn_end );
3015 tag = ber_next_element( ber, &len, dn_end )) {
3017 for ( tag = ber_first_element( ber, &len, &rdn_end );
3018 tag == LBER_SEQUENCE;
3019 tag = ber_next_element( ber, &len, rdn_end )) {
3020 tag = ber_skip_tag( ber, &len );
3021 ber_skip_data( ber, len );
3026 /* Allocate the DN/RDN/AVA stuff as a single block */
3027 dnsize = sizeof(LDAPRDN) * (nrdns+1);
3028 dnsize += sizeof(LDAPAVA *) * (navas+nrdns);
3029 dnsize += sizeof(LDAPAVA) * navas;
3030 if (dnsize > sizeof(ptrs)) {
3031 newDN = (LDAPDN)LDAP_MALLOC( dnsize );
3032 if ( newDN == NULL )
3033 return LDAP_NO_MEMORY;
3035 newDN = (LDAPDN)(char *)ptrs;
3038 newDN[nrdns] = NULL;
3039 newRDN = (LDAPRDN)(newDN + nrdns+1);
3040 newAVA = (LDAPAVA *)(newRDN + navas + nrdns);
3043 /* Rewind and start extracting */
3046 tag = ber_first_element( ber, &len, &dn_end );
3047 for ( i = nrdns - 1; i >= 0; i-- ) {
3050 for ( tag = ber_first_element( ber, &len, &rdn_end );
3051 tag == LBER_SEQUENCE;
3052 tag = ber_next_element( ber, &len, rdn_end )) {
3055 tag = ber_skip_tag( ber, &len );
3056 tag = ber_get_stringbv( ber, &Oid, LBER_BV_NOTERM );
3057 if ( tag != LBER_TAG_OID ) {
3058 rc = LDAP_DECODING_ERROR;
3062 oid2.bv_val = oidptr;
3063 oid2.bv_len = oidrem;
3064 if ( ber_decode_oid( &Oid, &oid2 ) < 0 ) {
3065 rc = LDAP_DECODING_ERROR;
3068 oidname = find_oid( &oid2 );
3070 newAVA->la_attr = oid2;
3071 oidptr += oid2.bv_len + 1;
3072 oidrem -= oid2.bv_len + 1;
3074 /* Running out of OID buffer space? */
3076 if ( oidsize == 0 ) {
3077 oidsize = sizeof(oids) * 2;
3079 oidbuf = LDAP_MALLOC( oidsize );
3080 if ( oidbuf == NULL ) goto nomem;
3084 oidbuf = LDAP_REALLOC( oidbuf, oidsize*2 );
3085 if ( oidbuf == NULL ) goto nomem;
3086 /* Buffer moved! Fix AVA pointers */
3087 if ( old != oidbuf ) {
3089 long dif = oidbuf - old;
3091 for (a=baseAVA; a<=newAVA; a++){
3092 if (a->la_attr.bv_val >= old &&
3093 a->la_attr.bv_val <= (old + oidsize))
3094 a->la_attr.bv_val += dif;
3097 oidptr = oidbuf + oidsize - oidrem;
3104 newAVA->la_attr = oidname->oid;
3106 newAVA->la_attr = oidname->name;
3109 tag = ber_get_stringbv( ber, &Val, LBER_BV_NOTERM );
3111 case LBER_TAG_UNIVERSAL:
3112 /* This uses 32-bit ISO 10646-1 */
3113 csize = 4; goto to_utf8;
3115 /* This uses 16-bit ISO 10646-1 */
3116 csize = 2; goto to_utf8;
3117 case LBER_TAG_TELETEX:
3118 /* This uses 8-bit, assume ISO 8859-1 */
3120 to_utf8: rc = ldap_ucs_to_utf8s( &Val, csize, &newAVA->la_value );
3121 newAVA->la_flags |= LDAP_AVA_FREE_VALUE;
3122 if (rc != LDAP_SUCCESS) goto nomem;
3123 newAVA->la_flags = LDAP_AVA_NONPRINTABLE;
3126 newAVA->la_flags = LDAP_AVA_NONPRINTABLE;
3127 /* This is already in UTF-8 encoding */
3129 case LBER_TAG_PRINTABLE:
3130 /* These are always 7-bit strings */
3131 newAVA->la_value = Val;
3135 newAVA->la_private = NULL;
3136 newAVA->la_flags = LDAP_AVA_STRING;
3140 tag = ber_next_element( ber, &len, dn_end );
3144 rc = func( newDN, flags, NULL );
3145 if ( rc != LDAP_SUCCESS )
3149 rc = ldap_dn2bv_x( newDN, bv, LDAP_DN_FORMAT_LDAPV3, NULL );
3152 for (;baseAVA < newAVA; baseAVA++) {
3153 if (baseAVA->la_flags & LDAP_AVA_FREE_ATTR)
3154 LDAP_FREE( baseAVA->la_attr.bv_val );
3155 if (baseAVA->la_flags & LDAP_AVA_FREE_VALUE)
3156 LDAP_FREE( baseAVA->la_value.bv_val );
3160 LDAP_FREE( oidbuf );
3161 if ( newDN != (LDAPDN)(char *) ptrs )