+/* $OpenLDAP$ */
/*
- * Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
+ * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*
* tls.c - Handle tls/ssl using SSLeay or OpenSSL.
#include "portable.h"
-#ifdef HAVE_TLS
-
#include <stdio.h>
-#include <stdlib.h>
+#include <ac/stdlib.h>
#include <ac/errno.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/time.h>
#include <ac/unistd.h>
+#include <ac/param.h>
#include "ldap-int.h"
+#ifdef HAVE_TLS
+
#ifdef LDAP_R_COMPILE
#include <ldap_pvt_thread.h>
#endif
#ifdef HAVE_OPENSSL_SSL_H
#include <openssl/ssl.h>
+#include <openssl/x509v3.h>
+#include <openssl/err.h>
+#include <openssl/rand.h>
+#include <openssl/safestack.h>
#elif defined( HAVE_SSL_H )
#include <ssl.h>
#endif
+static int tls_opt_trace = 1;
static char *tls_opt_certfile = NULL;
static char *tls_opt_keyfile = NULL;
static char *tls_opt_cacertfile = NULL;
static char *tls_opt_cacertdir = NULL;
static int tls_opt_require_cert = 0;
static char *tls_opt_ciphersuite = NULL;
+static char *tls_opt_randfile = NULL;
-#define HAS_TLS( sb ) ((sb)->sb_io==&tls_io)
-
-static int tls_setup( Sockbuf *sb, void *arg );
-static int tls_remove( Sockbuf *sb );
-static ber_slen_t tls_read( Sockbuf *sb, void *buf, ber_len_t len );
-static ber_slen_t tls_write( Sockbuf *sb, void *buf, ber_len_t len );
-static int tls_close( Sockbuf *sb );
-static int tls_report_error( void );
+#define HAS_TLS( sb ) ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO, \
+ (void *)&ldap_pvt_sockbuf_io_tls )
-static Sockbuf_IO tls_io=
-{
- tls_setup,
- tls_remove,
- tls_read,
- tls_write,
- tls_close
-};
+static void tls_report_error( void );
+static void tls_info_cb( SSL *ssl, int where, int ret );
static int tls_verify_cb( int ok, X509_STORE_CTX *ctx );
+static RSA * tls_tmp_rsa_cb( SSL *ssl, int is_export, int key_length );
+static STACK_OF(X509_NAME) * get_ca_list( char * bundle, char * dir );
+
+#if 0 /* Currently this is not used by anyone */
+static DH * tls_tmp_dh_cb( SSL *ssl, int is_export, int key_length );
+#endif
static SSL_CTX *tls_def_ctx = NULL;
+static int tls_seed_PRNG( const char *randfile );
+
#ifdef LDAP_R_COMPILE
/*
* provide mutexes for the SSLeay library.
static void tls_locking_cb( int mode, int type, const char *file, int line )
{
if ( mode & CRYPTO_LOCK ) {
- ldap_pvt_thread_mutex_lock( tls_mutexes+type );
+ ldap_pvt_thread_mutex_lock( &tls_mutexes[type] );
} else {
- ldap_pvt_thread_mutex_unlock( tls_mutexes+type );
+ ldap_pvt_thread_mutex_unlock( &tls_mutexes[type] );
}
}
int i;
for( i=0; i< CRYPTO_NUM_LOCKS ; i++ ) {
- ldap_pvt_thread_mutex_init( tls_mutexes+i );
+ ldap_pvt_thread_mutex_init( &tls_mutexes[i] );
}
CRYPTO_set_locking_callback( tls_locking_cb );
/* FIXME: the thread id should be added somehow... */
#endif /* LDAP_R_COMPILE */
/*
- * Initialize tls system. Should be called only once.
+ * Tear down the TLS subsystem. Should only be called once.
+ */
+void
+ldap_pvt_tls_destroy( void )
+{
+ SSL_CTX_free(tls_def_ctx);
+ EVP_cleanup();
+ ERR_free_strings();
+}
+
+/*
+ * Initialize TLS subsystem. Should be called only once.
*/
int
ldap_pvt_tls_init( void )
{
static int tls_initialized = 0;
- if ( tls_initialized )
- return -1;
+ if ( tls_initialized ) return 0;
+ tls_initialized = 1;
+
+ (void) tls_seed_PRNG( tls_opt_randfile );
+
#ifdef LDAP_R_COMPILE
tls_init_threads();
#endif
+
SSL_load_error_strings();
SSLeay_add_ssl_algorithms();
+
+ /* FIXME: mod_ssl does this */
+ X509V3_add_standard_extensions();
return 0;
}
int
ldap_pvt_tls_init_def_ctx( void )
{
+ STACK_OF(X509_NAME) *calist;
+
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_lock( &tls_def_ctx_mutex );
#endif
tls_def_ctx = SSL_CTX_new( SSLv23_method() );
if ( tls_def_ctx == NULL ) {
Debug( LDAP_DEBUG_ANY,
- "TLS: could not allocate default ctx.\n",0,0,0);
+ "TLS: could not allocate default ctx (%d).\n",
+ ERR_peek_error(),0,0);
goto error_exit;
}
if ( tls_opt_ciphersuite &&
!SSL_CTX_set_cipher_list( tls_def_ctx,
- tls_opt_ciphersuite ) ) {
+ tls_opt_ciphersuite ) )
+ {
Debug( LDAP_DEBUG_ANY,
"TLS: could not set cipher list %s.\n",
tls_opt_ciphersuite, 0, 0 );
tls_report_error();
goto error_exit;
}
- if ( !SSL_CTX_load_verify_locations( tls_def_ctx,
- tls_opt_cacertfile,
- tls_opt_cacertdir ) ||
- !SSL_CTX_set_default_verify_paths( tls_def_ctx ) ) {
- Debug( LDAP_DEBUG_ANY,
- "TLS: could not load verify locations (file:`%s',dir:`%s').\n",
- tls_opt_cacertfile,tls_opt_cacertdir,0);
- tls_report_error();
- goto error_exit;
+ if (tls_opt_cacertfile != NULL || tls_opt_cacertdir != NULL) {
+ if ( !SSL_CTX_load_verify_locations( tls_def_ctx,
+ tls_opt_cacertfile,
+ tls_opt_cacertdir )
+ || !SSL_CTX_set_default_verify_paths( tls_def_ctx ) )
+ {
+ Debug( LDAP_DEBUG_ANY, "TLS: "
+ "could not load verify locations (file:`%s',dir:`%s').\n",
+ tls_opt_cacertfile ? tls_opt_cacertfile : "",
+ tls_opt_cacertdir ? tls_opt_cacertdir : "",
+ 0 );
+ tls_report_error();
+ goto error_exit;
+ }
+ calist = get_ca_list( tls_opt_cacertfile, tls_opt_cacertdir );
+ if ( !calist ) {
+ Debug( LDAP_DEBUG_ANY, "TLS: "
+ "could not load client CA list (file:`%s',dir:`%s').\n",
+ tls_opt_cacertfile ? tls_opt_cacertfile : "",
+ tls_opt_cacertdir ? tls_opt_cacertdir : "",
+ 0 );
+ tls_report_error();
+ goto error_exit;
+ }
+ SSL_CTX_set_client_CA_list( tls_def_ctx, calist );
}
if ( tls_opt_keyfile &&
!SSL_CTX_use_PrivateKey_file( tls_def_ctx,
tls_opt_keyfile,
- SSL_FILETYPE_PEM ) ) {
+ SSL_FILETYPE_PEM ) )
+ {
Debug( LDAP_DEBUG_ANY,
"TLS: could not use key file `%s'.\n",
tls_opt_keyfile,0,0);
if ( tls_opt_certfile &&
!SSL_CTX_use_certificate_file( tls_def_ctx,
tls_opt_certfile,
- SSL_FILETYPE_PEM ) ) {
+ SSL_FILETYPE_PEM ) )
+ {
Debug( LDAP_DEBUG_ANY,
"TLS: could not use certificate `%s'.\n",
tls_opt_certfile,0,0);
goto error_exit;
}
if ( ( tls_opt_certfile || tls_opt_keyfile ) &&
- !SSL_CTX_check_private_key( tls_def_ctx ) ) {
+ !SSL_CTX_check_private_key( tls_def_ctx ) )
+ {
Debug( LDAP_DEBUG_ANY,
"TLS: private key mismatch.\n",
0,0,0);
tls_report_error();
goto error_exit;
}
- SSL_CTX_set_verify( tls_def_ctx, (tls_opt_require_cert) ?
+ if ( tls_opt_trace ) {
+ SSL_CTX_set_info_callback( tls_def_ctx, tls_info_cb );
+ }
+ SSL_CTX_set_verify( tls_def_ctx,
+ tls_opt_require_cert ?
(SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT) :
- SSL_VERIFY_PEER, tls_verify_cb );
+ SSL_VERIFY_NONE,
+ tls_verify_cb );
+ SSL_CTX_set_tmp_rsa_callback( tls_def_ctx, tls_tmp_rsa_cb );
+ /* SSL_CTX_set_tmp_dh_callback( tls_def_ctx, tls_tmp_dh_cb ); */
}
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
#endif
return 0;
error_exit:
+ if ( tls_def_ctx != NULL ) {
+ SSL_CTX_free( tls_def_ctx );
+ tls_def_ctx = NULL;
+ }
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_unlock( &tls_def_ctx_mutex );
#endif
return -1;
}
+static STACK_OF(X509_NAME) *
+get_ca_list( char * bundle, char * dir )
+{
+ STACK_OF(X509_NAME) *ca_list = NULL;
+
+ if ( bundle ) {
+ ca_list = SSL_load_client_CA_file( bundle );
+ }
+ /*
+ * FIXME: We have now to go over all files in dir, load them
+ * and add every certificate there to ca_list.
+ */
+ return ca_list;
+}
+
static SSL *
-alloc_handle( Sockbuf *sb, void *ctx_arg )
+alloc_handle( void *ctx_arg )
{
- int err;
SSL_CTX *ctx;
SSL *ssl;
if ( ctx_arg ) {
ctx = (SSL_CTX *) ctx_arg;
} else {
- if ( ldap_pvt_tls_init_def_ctx() < 0 )
- return NULL;
- ctx=tls_def_ctx;
+ if ( ldap_pvt_tls_init_def_ctx() < 0 ) return NULL;
+ ctx = tls_def_ctx;
}
ssl = SSL_new( ctx );
Debug( LDAP_DEBUG_ANY,"TLS: can't create ssl handle.\n",0,0,0);
return NULL;
}
-
- SSL_set_fd( ssl, ber_pvt_sb_get_desc( sb ) );
return ssl;
}
-static void
-update_flags( Sockbuf *sb, SSL * ssl )
+static int
+update_flags( Sockbuf *sb, SSL * ssl, int rc )
{
- sb->sb_trans_needs_read = SSL_want_read(ssl) ? 1 : 0;
- sb->sb_trans_needs_write = SSL_want_write(ssl) ? 1 : 0;
+ int err = SSL_get_error(ssl, rc);
+
+ sb->sb_trans_needs_read = 0;
+ sb->sb_trans_needs_write = 0;
+ if (err == SSL_ERROR_WANT_READ)
+ {
+ sb->sb_trans_needs_read = 1;
+ return 1;
+ } else if (err == SSL_ERROR_WANT_WRITE)
+ {
+ sb->sb_trans_needs_write = 1;
+ return 1;
+ } else if (err == SSL_ERROR_WANT_CONNECT)
+ {
+ return 1;
+ }
+ return 0;
}
+/*
+ * TLS support for LBER Sockbufs
+ */
+
+struct tls_data {
+ SSL *ssl;
+ Sockbuf_IO_Desc *sbiod;
+};
+
+extern BIO_METHOD ldap_pvt_sb_bio_method;
+
+static int
+sb_tls_setup( Sockbuf_IO_Desc *sbiod, void *arg )
+{
+ struct tls_data *p;
+ BIO *bio;
+
+ assert( sbiod != NULL );
+
+ p = LBER_MALLOC( sizeof( *p ) );
+ if ( p == NULL )
+ return -1;
+
+ p->ssl = (SSL *)arg;
+ p->sbiod = sbiod;
+ bio = BIO_new( &ldap_pvt_sb_bio_method );
+ bio->ptr = (void *)p;
+ SSL_set_bio( p->ssl, bio, bio );
+ sbiod->sbiod_pvt = p;
+ return 0;
+}
+
+static int
+sb_tls_remove( Sockbuf_IO_Desc *sbiod )
+{
+ struct tls_data *p;
+
+ assert( sbiod != NULL );
+ assert( sbiod->sbiod_pvt != NULL );
+
+ p = (struct tls_data *)sbiod->sbiod_pvt;
+ SSL_free( p->ssl );
+ LBER_FREE( sbiod->sbiod_pvt );
+ sbiod->sbiod_pvt = NULL;
+ return 0;
+}
+
+static int
+sb_tls_close( Sockbuf_IO_Desc *sbiod )
+{
+ struct tls_data *p;
+
+ assert( sbiod != NULL );
+ assert( sbiod->sbiod_pvt != NULL );
+
+ p = (struct tls_data *)sbiod->sbiod_pvt;
+ SSL_shutdown( p->ssl );
+ return 0;
+}
+
+static int
+sb_tls_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
+{
+ struct tls_data *p;
+
+ assert( sbiod != NULL );
+ assert( sbiod->sbiod_pvt != NULL );
+
+ p = (struct tls_data *)sbiod->sbiod_pvt;
+
+ if ( opt == LBER_SB_OPT_GET_SSL ) {
+ *((SSL **)arg) = p->ssl;
+ return 1;
+
+ } else if ( opt == LBER_SB_OPT_DATA_READY ) {
+ if( SSL_pending( p->ssl ) > 0 ) {
+ return 1;
+ }
+ }
+
+ return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
+}
+
+static ber_slen_t
+sb_tls_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
+{
+ struct tls_data *p;
+ ber_slen_t ret;
+ int err;
+
+ assert( sbiod != NULL );
+ assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
+
+ p = (struct tls_data *)sbiod->sbiod_pvt;
+
+ ret = SSL_read( p->ssl, (char *)buf, len );
+#ifdef HAVE_WINSOCK
+ errno = WSAGetLastError();
+#endif
+ err = SSL_get_error( p->ssl, ret );
+ if (err == SSL_ERROR_WANT_READ ) {
+ sbiod->sbiod_sb->sb_trans_needs_read = 1;
+#ifdef WIN32
+ errno = EWOULDBLOCK;
+#endif
+ }
+ else
+ sbiod->sbiod_sb->sb_trans_needs_read = 0;
+ return ret;
+}
+
+static ber_slen_t
+sb_tls_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
+{
+ struct tls_data *p;
+ ber_slen_t ret;
+ int err;
+
+ assert( sbiod != NULL );
+ assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
+
+ p = (struct tls_data *)sbiod->sbiod_pvt;
+
+ ret = SSL_write( p->ssl, (char *)buf, len );
+#ifdef HAVE_WINSOCK
+ errno = WSAGetLastError();
+#endif
+ err = SSL_get_error( p->ssl, ret );
+ if (err == SSL_ERROR_WANT_WRITE ) {
+ sbiod->sbiod_sb->sb_trans_needs_write = 1;
+#ifdef WIN32
+ errno = EWOULDBLOCK;
+#endif
+ }
+ else
+ sbiod->sbiod_sb->sb_trans_needs_write = 0;
+ return ret;
+}
+
+Sockbuf_IO ldap_pvt_sockbuf_io_tls =
+{
+ sb_tls_setup, /* sbi_setup */
+ sb_tls_remove, /* sbi_remove */
+ sb_tls_ctrl, /* sbi_ctrl */
+ sb_tls_read, /* sbi_read */
+ sb_tls_write, /* sbi_write */
+ sb_tls_close /* sbi_close */
+};
+
+static int
+sb_tls_bio_create( BIO *b ) {
+ b->init = 1;
+ b->num = 0;
+ b->ptr = NULL;
+ b->flags = 0;
+ return 1;
+}
+
+static int
+sb_tls_bio_destroy( BIO *b )
+{
+ if ( b == NULL )
+ return 0;
+
+ b->ptr = NULL; /* sb_tls_remove() will free it */
+ b->init = 0;
+ b->flags = 0;
+ return 1;
+}
+
+static int
+sb_tls_bio_read( BIO *b, char *buf, int len )
+{
+ struct tls_data *p;
+ int ret;
+
+ if ( buf == NULL || len <= 0 )
+ return 0;
+
+ p = (struct tls_data *)b->ptr;
+
+ if ( p == NULL || p->sbiod == NULL )
+ return 0;
+
+ ret = LBER_SBIOD_READ_NEXT( p->sbiod, buf, len );
+
+ BIO_clear_retry_flags( b );
+ if ( ret < 0 && errno == EWOULDBLOCK )
+ BIO_set_retry_read( b );
+
+ return ret;
+}
+
+static int
+sb_tls_bio_write( BIO *b, const char *buf, int len )
+{
+ struct tls_data *p;
+ int ret;
+
+ if ( buf == NULL || len <= 0 )
+ return 0;
+
+ p = (struct tls_data *)b->ptr;
+
+ if ( p == NULL || p->sbiod == NULL )
+ return 0;
+
+ ret = LBER_SBIOD_WRITE_NEXT( p->sbiod, (char *)buf, len );
+
+ BIO_clear_retry_flags( b );
+ if ( ret < 0 && errno == EWOULDBLOCK )
+ BIO_set_retry_write( b );
+
+ return ret;
+}
+
+static long
+sb_tls_bio_ctrl( BIO *b, int cmd, long num, void *ptr )
+{
+ if ( cmd == BIO_CTRL_FLUSH ) {
+ /* The OpenSSL library needs this */
+ return 1;
+ }
+ return 0;
+}
+
+static int
+sb_tls_bio_gets( BIO *b, char *buf, int len )
+{
+ return -1;
+}
+
+static int
+sb_tls_bio_puts( BIO *b, const char *str )
+{
+ return sb_tls_bio_write( b, str, strlen( str ) );
+}
+
+BIO_METHOD ldap_pvt_sb_bio_method =
+{
+ ( 100 | 0x400 ), /* it's a source/sink BIO */
+ "sockbuf glue",
+ sb_tls_bio_write,
+ sb_tls_bio_read,
+ sb_tls_bio_puts,
+ sb_tls_bio_gets,
+ sb_tls_bio_ctrl,
+ sb_tls_bio_create,
+ sb_tls_bio_destroy
+};
+
/*
* Call this to do a TLS connect on a sockbuf. ctx_arg can be
* a SSL_CTX * or NULL, in which case the default ctx is used.
* and call again.
*/
-int
-ldap_pvt_tls_connect( Sockbuf *sb, void *ctx_arg )
+static int
+ldap_int_tls_connect( LDAP *ld, LDAPConn *conn )
{
+ Sockbuf *sb = conn->lconn_sb;
int err;
SSL *ssl;
if ( HAS_TLS( sb ) ) {
- ssl = (SSL *) sb->sb_iodata;
+ ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
+
} else {
- ssl = alloc_handle( sb, ctx_arg );
- if ( ssl == NULL )
- return -1;
- ber_pvt_sb_clear_io( sb );
- ber_pvt_sb_set_io( sb, &tls_io, (void *)ssl );
+ void *ctx = ld->ld_defconn
+ ? ld->ld_defconn->lconn_tls_ctx : NULL;
+
+ ssl = alloc_handle( ctx );
+
+ if ( ssl == NULL ) return -1;
+
+#ifdef LDAP_DEBUG
+ ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
+ LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
+#endif
+ ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_tls,
+ LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
+
+ if( ctx == NULL ) {
+ conn->lconn_tls_ctx = tls_def_ctx;
+ }
}
err = SSL_connect( ssl );
- if ( err <= 0 ) {
- if (
-#ifdef EWOULDBLOCK
- (errno==EWOULDBLOCK) ||
+#ifdef HAVE_WINSOCK
+ errno = WSAGetLastError();
#endif
-#ifdef EAGAIN
- (errno==EAGAIN) ||
-#endif
- (0)) {
- update_flags( sb, ssl );
+ if ( err <= 0 ) {
+ if ( update_flags( sb, ssl, err )) {
return 1;
}
+ if ((err = ERR_peek_error())) {
+ char buf[256];
+ ld->ld_error = LDAP_STRDUP(ERR_error_string(err, buf));
+ }
Debug( LDAP_DEBUG_ANY,"TLS: can't connect.\n",0,0,0);
- ber_pvt_sb_clear_io( sb );
- ber_pvt_sb_set_io( sb, &ber_pvt_sb_io_tcp, NULL );
+ ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_tls,
+ LBER_SBIOD_LEVEL_TRANSPORT );
+#ifdef LDAP_DEBUG
+ ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
+ LBER_SBIOD_LEVEL_TRANSPORT );
+#endif
return -1;
}
+
return 0;
}
SSL *ssl;
if ( HAS_TLS( sb ) ) {
- ssl = (SSL *) sb->sb_iodata;
+ ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
} else {
- ssl = alloc_handle( sb, ctx_arg );
+ ssl = alloc_handle( ctx_arg );
if ( ssl == NULL )
return -1;
- ber_pvt_sb_clear_io( sb );
- ber_pvt_sb_set_io( sb, &tls_io, (void *)ssl );
+#ifdef LDAP_DEBUG
+ ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
+ LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
+#endif
+ ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_tls,
+ LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
}
err = SSL_accept( ssl );
- if ( err <= 0 ) {
- if (
-#ifdef EWOULDBLOCK
- (errno==EWOULDBLOCK) ||
-#endif
-#ifdef EAGAIN
- (errno==EAGAIN) ||
+#ifdef HAVE_WINSOCK
+ errno = WSAGetLastError();
#endif
- (0)) {
- update_flags( sb, ssl );
+ if ( err <= 0 ) {
+ if ( update_flags( sb, ssl, err ))
return 1;
- }
Debug( LDAP_DEBUG_ANY,"TLS: can't accept.\n",0,0,0 );
tls_report_error();
- ber_pvt_sb_clear_io( sb );
- ber_pvt_sb_set_io( sb, &ber_pvt_sb_io_tcp, NULL );
+ ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_tls,
+ LBER_SBIOD_LEVEL_TRANSPORT );
+#ifdef LDAP_DEBUG
+ ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
+ LBER_SBIOD_LEVEL_TRANSPORT );
+#endif
return -1;
}
+
return 0;
}
-const char *
-ldap_pvt_tls_get_peer( LDAP *ld )
+int
+ldap_pvt_tls_inplace ( Sockbuf *sb )
{
+ if ( HAS_TLS( sb ) )
+ return(1);
+ return(0);
+}
+
+void *
+ldap_pvt_tls_sb_ctx( Sockbuf *sb )
+{
+ void *p;
+
+ if (HAS_TLS( sb )) {
+ ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&p );
+ return p;
+ }
+
+ return NULL;
+}
+
+int
+ldap_pvt_tls_get_strength( void *s )
+{
+ SSL_CIPHER *c;
+
+ c = SSL_get_current_cipher((SSL *)s);
+ return SSL_CIPHER_get_bits(c, NULL);
+}
+
+
+char *
+ldap_pvt_tls_get_peer( void *s )
+{
+ X509 *x;
+ X509_NAME *xn;
+ char buf[2048], *p;
+
+ x = SSL_get_peer_certificate((SSL *)s);
+
+ if (!x)
+ return NULL;
+
+ xn = X509_get_subject_name(x);
+ p = LDAP_STRDUP(X509_NAME_oneline(xn, buf, sizeof(buf)));
+ X509_free(x);
+ return p;
+}
+
+char *
+ldap_pvt_tls_get_peer_dn( void *s )
+{
+ X509 *x;
+ X509_NAME *xn;
+ char buf[2048], *p, *dn;
+
+ x = SSL_get_peer_certificate((SSL *)s);
+
+ if (!x) return NULL;
+
+ xn = X509_get_subject_name(x);
+ p = X509_NAME_oneline(xn, buf, sizeof(buf));
+
+ dn = ldap_dcedn2dn( p );
+
+ X509_free(x);
+ return dn;
+}
+
+char *
+ldap_pvt_tls_get_peer_hostname( void *s )
+{
+ X509 *x;
+ X509_NAME *xn;
+ char buf[2048], *p;
+ int ret;
+
+ x = SSL_get_peer_certificate((SSL *)s);
+
+ if (!x)
+ return NULL;
+
+ xn = X509_get_subject_name(x);
+
+ ret = X509_NAME_get_text_by_NID(xn, NID_commonName, buf, sizeof(buf));
+ if( ret == -1 ) {
+ X509_free(x);
+ return NULL;
+ }
+
+ p = LDAP_STRDUP(buf);
+ X509_free(x);
+ return p;
+}
+
+int
+ldap_pvt_tls_check_hostname( void *s, char *name )
+{
+ int i, ret = LDAP_LOCAL_ERROR;
+ X509 *x;
+
+ x = SSL_get_peer_certificate((SSL *)s);
+ if (!x)
+ {
+ Debug( LDAP_DEBUG_ANY,
+ "TLS: unable to get peer certificate.\n",
+ 0, 0, 0 );
+ return ret;
+ }
+
+ i = X509_get_ext_by_NID(x, NID_subject_alt_name, -1);
+ if (i >= 0)
+ {
+ X509_EXTENSION *ex;
+ STACK_OF(GENERAL_NAME) *alt;
+
+ ex = X509_get_ext(x, i);
+ alt = X509V3_EXT_d2i(ex);
+ if (alt)
+ {
+ int n, len1, len2;
+ char *domain;
+ GENERAL_NAME *gn;
+ X509V3_EXT_METHOD *method;
+
+ len1 = strlen(name);
+ n = sk_GENERAL_NAME_num(alt);
+ domain = strchr(name, '.');
+ if (domain)
+ len2 = len1 - (domain-name);
+ for (i=0; i<n; i++)
+ {
+ gn = sk_GENERAL_NAME_value(alt, i);
+ if (gn->type == GEN_DNS)
+ {
+ char *sn = ASN1_STRING_data(gn->d.ia5);
+ int sl = ASN1_STRING_length(gn->d.ia5);
+
+ /* Is this an exact match? */
+ if ((len1 == sl) && !strncasecmp(name, sn, len1))
+ break;
+
+ /* Is this a wildcard match? */
+ if ((*sn == '*') && domain && (len2 == sl-1) &&
+ !strncasecmp(domain, sn+1, len2))
+ break;
+ }
+ }
+ method = X509V3_EXT_get(ex);
+ method->ext_free(alt);
+ if (i < n) /* Found a match */
+ ret = LDAP_SUCCESS;
+ }
+ }
+
+ if (ret != LDAP_SUCCESS)
+ {
+ X509_NAME *xn;
+ char buf[2048];
+
+ xn = X509_get_subject_name(x);
+
+ if (X509_NAME_get_text_by_NID(xn, NID_commonName, buf, sizeof(buf))
+ == -1)
+ {
+ Debug( LDAP_DEBUG_ANY,
+ "TLS: unable to get common name from peer certificate.\n",
+ 0, 0, 0 );
+ } else if (strcasecmp(name, buf))
+ {
+ Debug( LDAP_DEBUG_ANY, "TLS: hostname (%s) does not match "
+ "common name in certificate (%s).\n",
+ name, buf, 0 );
+ ret = LDAP_CONNECT_ERROR;
+ } else
+ {
+ ret = LDAP_SUCCESS;
+ }
+ }
+ X509_free(x);
+ return ret;
}
const char *
-ldap_pvt_tls_get_peer_issuer( LDAP *ld )
+ldap_pvt_tls_get_peer_issuer( void *s )
{
+#if 0 /* currently unused; see ldap_pvt_tls_get_peer() if needed */
+ X509 *x;
+ X509_NAME *xn;
+ char buf[2048], *p;
+
+ x = SSL_get_peer_certificate((SSL *)s);
+
+ if (!x)
+ return NULL;
+
+ xn = X509_get_issuer_name(x);
+ p = LDAP_STRDUP(X509_NAME_oneline(xn, buf, sizeof(buf)));
+ X509_free(x);
+ return p;
+#else
+ return NULL;
+#endif
}
int
-ldap_pvt_tls_config( struct ldapoptions *lo, int option, const char *arg )
+ldap_int_tls_config( LDAP *ld, int option, const char *arg )
{
int i;
case LDAP_OPT_X_TLS_CACERTDIR:
case LDAP_OPT_X_TLS_CERTFILE:
case LDAP_OPT_X_TLS_KEYFILE:
- return ldap_pvt_tls_set_option( NULL, option, (void *) arg );
+ case LDAP_OPT_X_TLS_RANDOM_FILE:
+ return ldap_pvt_tls_set_option( ld, option, (void *) arg );
+
case LDAP_OPT_X_TLS_REQUIRE_CERT:
i = ( ( strcasecmp( arg, "on" ) == 0 ) ||
( strcasecmp( arg, "yes" ) == 0) ||
( strcasecmp( arg, "true" ) == 0 ) );
- return ldap_pvt_tls_set_option( NULL, option, (void *) &i );
+ return ldap_pvt_tls_set_option( ld, option, (void *) &i );
+
case LDAP_OPT_X_TLS:
+ i = -1;
if ( strcasecmp( arg, "never" ) == 0 )
- return ldap_pvt_tls_set_option( lo, option,
- LDAP_OPT_X_TLS_NEVER );
+ i = LDAP_OPT_X_TLS_NEVER ;
if ( strcasecmp( arg, "demand" ) == 0 )
- return ldap_pvt_tls_set_option( lo, option,
- LDAP_OPT_X_TLS_DEMAND );
+ i = LDAP_OPT_X_TLS_DEMAND ;
if ( strcasecmp( arg, "allow" ) == 0 )
- return ldap_pvt_tls_set_option( lo, option,
- LDAP_OPT_X_TLS_ALLOW );
+ i = LDAP_OPT_X_TLS_ALLOW ;
if ( strcasecmp( arg, "try" ) == 0 )
- return ldap_pvt_tls_set_option( lo, option,
- LDAP_OPT_X_TLS_TRY );
+ i = LDAP_OPT_X_TLS_TRY ;
if ( strcasecmp( arg, "hard" ) == 0 )
- return ldap_pvt_tls_set_option( lo, option,
- LDAP_OPT_X_TLS_HARD );
- return -1;
- default:
+ i = LDAP_OPT_X_TLS_HARD ;
+
+ if (i >= 0) {
+ return ldap_pvt_tls_set_option( ld, option, &i );
+ }
return -1;
}
+
+ return -1;
}
int
-ldap_pvt_tls_get_option( struct ldapoptions *lo, int option, void *arg )
+ldap_pvt_tls_get_option( LDAP *ld, int option, void *arg )
{
+ struct ldapoptions *lo;
+
+ if( ld != NULL ) {
+ assert( LDAP_VALID( ld ) );
+
+ if( !LDAP_VALID( ld ) ) {
+ return LDAP_OPT_ERROR;
+ }
+
+ lo = &ld->ld_options;
+
+ } else {
+ /* Get pointer to global option structure */
+ lo = LDAP_INT_GLOBAL_OPT();
+ if ( lo == NULL ) {
+ return LDAP_NO_MEMORY;
+ }
+ }
+
switch( option ) {
case LDAP_OPT_X_TLS:
*(int *)arg = lo->ldo_tls_mode;
break;
- case LDAP_OPT_X_TLS_CERT:
- if ( lo == NULL )
- arg = (void *) tls_def_ctx;
+ case LDAP_OPT_X_TLS_CTX:
+ if ( ld == NULL )
+ *(void **)arg = (void *) tls_def_ctx;
else
- arg = lo->ldo_tls_ctx;
+ *(void **)arg = ld->ld_defconn->lconn_tls_ctx;
break;
case LDAP_OPT_X_TLS_CACERTFILE:
*(char **)arg = tls_opt_cacertfile ?
- strdup( tls_opt_cacertfile ) : NULL;
+ LDAP_STRDUP( tls_opt_cacertfile ) : NULL;
break;
case LDAP_OPT_X_TLS_CACERTDIR:
*(char **)arg = tls_opt_cacertdir ?
- strdup( tls_opt_cacertdir ) : NULL;
+ LDAP_STRDUP( tls_opt_cacertdir ) : NULL;
break;
case LDAP_OPT_X_TLS_CERTFILE:
*(char **)arg = tls_opt_certfile ?
- strdup( tls_opt_certfile ) : NULL;
+ LDAP_STRDUP( tls_opt_certfile ) : NULL;
break;
case LDAP_OPT_X_TLS_KEYFILE:
*(char **)arg = tls_opt_keyfile ?
- strdup( tls_opt_keyfile ) : NULL;
+ LDAP_STRDUP( tls_opt_keyfile ) : NULL;
break;
case LDAP_OPT_X_TLS_REQUIRE_CERT:
*(int *)arg = tls_opt_require_cert;
break;
+ case LDAP_OPT_X_TLS_RANDOM_FILE:
+ *(char **)arg = tls_opt_randfile;
+ break;
default:
return -1;
}
}
int
-ldap_pvt_tls_set_option( struct ldapoptions *lo, int option, void *arg )
+ldap_pvt_tls_set_option( LDAP *ld, int option, void *arg )
{
+ struct ldapoptions *lo;
+
+ if( ld != NULL ) {
+ assert( LDAP_VALID( ld ) );
+
+ if( !LDAP_VALID( ld ) ) {
+ return LDAP_OPT_ERROR;
+ }
+
+ lo = &ld->ld_options;
+
+ } else {
+ /* Get pointer to global option structure */
+ lo = LDAP_INT_GLOBAL_OPT();
+ if ( lo == NULL ) {
+ return LDAP_NO_MEMORY;
+ }
+ }
+
switch( option ) {
case LDAP_OPT_X_TLS:
switch( *(int *) arg ) {
case LDAP_OPT_X_TLS_ALLOW:
case LDAP_OPT_X_TLS_TRY:
case LDAP_OPT_X_TLS_HARD:
- lo->ldo_tls_mode = *(int *)arg;
- break;
- default:
- return -1;
+ if (lo != NULL) {
+ lo->ldo_tls_mode = *(int *)arg;
+ }
+
+ return 0;
}
- break;
- case LDAP_OPT_X_TLS_CERT:
- if ( lo == NULL )
+ return -1;
+
+ case LDAP_OPT_X_TLS_CTX:
+ if ( ld == NULL ) {
tls_def_ctx = (SSL_CTX *) arg;
- else
- lo->ldo_tls_ctx = arg;
- break;
+
+ } else {
+ ld->ld_defconn->lconn_tls_ctx = arg;
+ }
+ return 0;
}
- if ( lo != NULL )
+
+ if ( ld != NULL ) {
return -1;
+ }
+
switch( option ) {
case LDAP_OPT_X_TLS_CACERTFILE:
- if ( tls_opt_cacertfile ) free( tls_opt_cacertfile );
- tls_opt_cacertfile = arg ? strdup( (char *) arg ) : NULL;
+ if ( tls_opt_cacertfile ) LDAP_FREE( tls_opt_cacertfile );
+ tls_opt_cacertfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
break;
case LDAP_OPT_X_TLS_CACERTDIR:
- if ( tls_opt_cacertdir ) free( tls_opt_cacertdir );
- tls_opt_cacertdir = arg ? strdup( (char *) arg ) : NULL;
+ if ( tls_opt_cacertdir ) LDAP_FREE( tls_opt_cacertdir );
+ tls_opt_cacertdir = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
break;
case LDAP_OPT_X_TLS_CERTFILE:
- if ( tls_opt_certfile ) free( tls_opt_certfile );
- tls_opt_certfile = arg ? strdup( (char *) arg ) : NULL;
+ if ( tls_opt_certfile ) LDAP_FREE( tls_opt_certfile );
+ tls_opt_certfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
break;
case LDAP_OPT_X_TLS_KEYFILE:
- if ( tls_opt_keyfile ) free( tls_opt_keyfile );
- tls_opt_keyfile = arg ? strdup( (char *) arg ) : NULL;
+ if ( tls_opt_keyfile ) LDAP_FREE( tls_opt_keyfile );
+ tls_opt_keyfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
break;
case LDAP_OPT_X_TLS_REQUIRE_CERT:
tls_opt_require_cert = * (int *) arg;
break;
case LDAP_OPT_X_TLS_CIPHER_SUITE:
- if ( tls_opt_ciphersuite ) free( tls_opt_ciphersuite );
- tls_opt_ciphersuite = arg ? strdup( (char *) arg ) : NULL;
+ if ( tls_opt_ciphersuite ) LDAP_FREE( tls_opt_ciphersuite );
+ tls_opt_ciphersuite = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
+ break;
+ case LDAP_OPT_X_TLS_RANDOM_FILE:
+ if (tls_opt_randfile ) LDAP_FREE (tls_opt_randfile );
+ tls_opt_randfile = arg ? LDAP_STRDUP( (char *) arg ) : NULL;
break;
default:
return -1;
return 0;
}
-static int
-tls_setup( Sockbuf *sb, void *arg )
+int
+ldap_int_tls_start ( LDAP *ld, LDAPConn *conn, LDAPURLDesc *srv )
{
- sb->sb_iodata = arg;
- return 0;
-}
+ Sockbuf *sb = conn->lconn_sb;
+ char *host;
+ void *ssl;
-static int
-tls_remove( Sockbuf *sb )
-{
- SSL_free( (SSL *) sb->sb_iodata );
- return 0;
-}
+ if( srv ) {
+ host = srv->lud_host;
+ } else {
+ host = conn->lconn_server->lud_host;
+ }
-static ber_slen_t
-tls_write( Sockbuf *sb, void *buf, ber_len_t sz )
-{
- int ret = SSL_write( (SSL *)sb->sb_iodata, buf, sz );
+ /* avoid NULL host */
+ if( host == NULL ) host = "localhost";
- update_flags(sb, (SSL *)sb->sb_iodata );
- return ret;
-}
+ (void) ldap_pvt_tls_init();
-static ber_slen_t
-tls_read( Sockbuf *sb, void *buf, ber_len_t sz )
-{
- int ret = SSL_read( (SSL *)sb->sb_iodata, buf, sz );
+ /*
+ * Fortunately, the lib uses blocking io...
+ */
+ if ( ldap_int_tls_connect( ld, conn ) < 0 ) {
+ ld->ld_errno = LDAP_CONNECT_ERROR;
+ return (ld->ld_errno);
+ }
- update_flags(sb, (SSL *)sb->sb_iodata );
- return ret;
+ ssl = (void *) ldap_pvt_tls_sb_ctx( sb );
+ assert( ssl != NULL );
+
+ /*
+ * compare host with name(s) in certificate
+ */
+ ld->ld_errno = ldap_pvt_tls_check_hostname( ssl, host );
+ if (ld->ld_errno != LDAP_SUCCESS) {
+ return ld->ld_errno;
+ }
+
+ /*
+ * set SASL properties to TLS ssf and authid
+ */
+ {
+ const char *authid;
+ ber_len_t ssf;
+
+ /* we need to let SASL know */
+ ssf = ldap_pvt_tls_get_strength( ssl );
+ authid = ldap_pvt_tls_get_peer( ssl );
+
+ (void) ldap_int_sasl_external( ld, conn, authid, ssf );
+ }
+
+ return LDAP_SUCCESS;
}
-static int
-tls_close( Sockbuf *sb )
+/* Derived from openssl/apps/s_cb.c */
+static void
+tls_info_cb( SSL *ssl, int where, int ret )
{
- tcp_close( ber_pvt_sb_get_desc( sb ) );
- return 0;
+ int w;
+ char *op;
+
+ w = where & ~SSL_ST_MASK;
+ if ( w & SSL_ST_CONNECT ) {
+ op = "SSL_connect";
+ } else if ( w & SSL_ST_ACCEPT ) {
+ op = "SSL_accept";
+ } else {
+ op = "undefined";
+ }
+
+ if ( where & SSL_CB_LOOP ) {
+ Debug( LDAP_DEBUG_TRACE,
+ "TLS trace: %s:%s\n",
+ op, SSL_state_string_long( ssl ), 0 );
+ } else if ( where & SSL_CB_ALERT ) {
+ op = ( where & SSL_CB_READ ) ? "read" : "write";
+ Debug( LDAP_DEBUG_TRACE,
+ "TLS trace: SSL3 alert %s:%s:%s\n",
+ op,
+ SSL_alert_type_string_long( ret ),
+ SSL_alert_desc_string_long( ret) );
+ } else if ( where & SSL_CB_EXIT ) {
+ if ( ret == 0 ) {
+ Debug( LDAP_DEBUG_TRACE,
+ "TLS trace: %s:failed in %s\n",
+ op, SSL_state_string_long( ssl ), 0 );
+ } else if ( ret < 0 ) {
+ Debug( LDAP_DEBUG_TRACE,
+ "TLS trace: %s:error in %s\n",
+ op, SSL_state_string_long( ssl ), 0 );
+ }
+ }
}
static int
tls_verify_cb( int ok, X509_STORE_CTX *ctx )
{
- return 1;
+ X509 *cert;
+ int errnum;
+ int errdepth;
+ X509_NAME *subject;
+ X509_NAME *issuer;
+ char *sname;
+ char *iname;
+
+ cert = X509_STORE_CTX_get_current_cert( ctx );
+ errnum = X509_STORE_CTX_get_error( ctx );
+ errdepth = X509_STORE_CTX_get_error_depth( ctx );
+
+ /*
+ * X509_get_*_name return pointers to the internal copies of
+ * those things requested. So do not free them.
+ */
+ subject = X509_get_subject_name( cert );
+ issuer = X509_get_issuer_name( cert );
+ /* X509_NAME_oneline, if passed a NULL buf, allocate memomry */
+ sname = X509_NAME_oneline( subject, NULL, 0 );
+ iname = X509_NAME_oneline( issuer, NULL, 0 );
+ Debug( LDAP_DEBUG_TRACE,
+ "TLS certificate verification: depth: %d, subject: %s, issuer: %s\n",
+ errdepth,
+ sname ? sname : "-unknown-",
+ iname ? iname : "-unknown-" );
+ if ( sname )
+ CRYPTO_free ( sname );
+ if ( iname )
+ CRYPTO_free ( iname );
+
+ return ok;
}
/* Inspired by ERR_print_errors in OpenSSL */
-static int
+static void
tls_report_error( void )
{
unsigned long l;
}
}
+static RSA *
+tls_tmp_rsa_cb( SSL *ssl, int is_export, int key_length )
+{
+ RSA *tmp_rsa;
+
+ /* FIXME: Pregenerate the key on startup */
+ /* FIXME: Who frees the key? */
+ tmp_rsa = RSA_generate_key( key_length, RSA_F4, NULL, NULL );
+
+ if ( !tmp_rsa ) {
+ Debug( LDAP_DEBUG_ANY,
+ "TLS: Failed to generate temporary %d-bit %s RSA key\n",
+ key_length, is_export ? "export" : "domestic", 0 );
+ return NULL;
+ }
+ return tmp_rsa;
+}
+
+static int
+tls_seed_PRNG( const char *randfile )
+{
+#ifndef URANDOM_DEVICE
+ /* no /dev/urandom (or equiv) */
+ long total=0;
+ char buffer[MAXPATHLEN];
+
+ if (randfile == NULL) {
+ /* The seed file is $RANDFILE if defined, otherwise $HOME/.rnd.
+ * If $HOME is not set or buffer too small to hold the pathname,
+ * an error occurs. - From RAND_file_name() man page.
+ * The fact is that when $HOME is NULL, .rnd is used.
+ */
+ randfile = RAND_file_name( buffer, sizeof( buffer ) );
+
+ } else if (RAND_egd(randfile) > 0) {
+ /* EGD socket */
+ return 0;
+ }
+
+ if (randfile == NULL) {
+ Debug( LDAP_DEBUG_ANY,
+ "TLS: Use configuration file or $RANDFILE to define seed PRNG\n",
+ 0, 0, 0);
+ return -1;
+ }
+
+ total = RAND_load_file(randfile, -1);
+
+ if (RAND_status() == 0) {
+ Debug( LDAP_DEBUG_ANY,
+ "TLS: PRNG not been seeded with enough data\n",
+ 0, 0, 0);
+ return -1;
+ }
+
+ /* assume if there was enough bits to seed that it's okay
+ * to write derived bits to the file
+ */
+ RAND_write_file(randfile);
+
+#endif
+
+ return 0;
+}
+
+#if 0
+static DH *
+tls_tmp_dh_cb( SSL *ssl, int is_export, int key_length )
+{
+ return NULL;
+}
+#endif
+#endif
+
+int
+ldap_start_tls_s ( LDAP *ld,
+ LDAPControl **serverctrls,
+ LDAPControl **clientctrls )
+{
+ int rc;
+
+#ifdef HAVE_TLS
+ char *rspoid = NULL;
+ struct berval *rspdata = NULL;
+
+ /* XXYYZ: this initiates operation only on default connection! */
+
+ if ( ldap_pvt_tls_inplace( ld->ld_sb ) != 0 ) {
+ return LDAP_LOCAL_ERROR;
+ }
+
+ rc = ldap_extended_operation_s( ld, LDAP_EXOP_START_TLS,
+ NULL, serverctrls, clientctrls, &rspoid, &rspdata );
+ if ( rc != LDAP_SUCCESS ) {
+ return rc;
+ }
+
+ if ( rspoid != NULL ) {
+ LDAP_FREE(rspoid);
+ }
+
+ if ( rspdata != NULL ) {
+ ber_bvfree( rspdata );
+ }
+
+ rc = ldap_int_tls_start( ld, ld->ld_defconn, NULL );
#else
-static int dummy;
+ rc = LDAP_NOT_SUPPORTED;
#endif
+ return rc;
+}
+
projects / openldap / blobdiff