/* $NetBSD: tls2.c,v 1.1.1.5.6.1 2019/08/10 06:17:14 martin Exp $ */
/* tls.c - Handle tls/ssl. */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2019 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/* ACKNOWLEDGEMENTS: restructured by Howard Chu.
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: tls2.c,v 1.1.1.5.6.1 2019/08/10 06:17:14 martin Exp $");
#include "portable.h"
#include "ldap_config.h"
#include <stdio.h>
#include <ac/stdlib.h>
#include <ac/errno.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/ctype.h>
#include <ac/time.h>
#include <ac/unistd.h>
#include <ac/param.h>
#include <ac/dirent.h>
#include "ldap-int.h"
#ifdef HAVE_TLS
#include "ldap-tls.h"
static tls_impl *tls_imp = &ldap_int_tls_impl;
#define HAS_TLS( sb ) ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO, \
(void *)tls_imp->ti_sbio )
#endif /* HAVE_TLS */
#ifdef LDAP_DEVEL
#define LDAP_USE_NON_BLOCKING_TLS
#endif /* LDAP_DEVEL */
/* RFC2459 minimum required set of supported attribute types
* in a certificate DN
*/
typedef struct oid_name {
struct berval oid;
struct berval name;
} oid_name;
static oid_name oids[] = {
{ BER_BVC("2.5.4.3"), BER_BVC("cn") },
{ BER_BVC("2.5.4.4"), BER_BVC("sn") },
{ BER_BVC("2.5.4.6"), BER_BVC("c") },
{ BER_BVC("2.5.4.7"), BER_BVC("l") },
{ BER_BVC("2.5.4.8"), BER_BVC("st") },
{ BER_BVC("2.5.4.10"), BER_BVC("o") },
{ BER_BVC("2.5.4.11"), BER_BVC("ou") },
{ BER_BVC("2.5.4.12"), BER_BVC("title") },
{ BER_BVC("2.5.4.41"), BER_BVC("name") },
{ BER_BVC("2.5.4.42"), BER_BVC("givenName") },
{ BER_BVC("2.5.4.43"), BER_BVC("initials") },
{ BER_BVC("2.5.4.44"), BER_BVC("generationQualifier") },
{ BER_BVC("2.5.4.46"), BER_BVC("dnQualifier") },
{ BER_BVC("1.2.840.113549.1.9.1"), BER_BVC("email") },
{ BER_BVC("0.9.2342.19200300.100.1.25"), BER_BVC("dc") },
{ BER_BVNULL, BER_BVNULL }
};
#ifdef HAVE_TLS
void
ldap_pvt_tls_ctx_free ( void *c )
{
if ( !c ) return;
tls_imp->ti_ctx_free( c );
}
static void
tls_ctx_ref( tls_ctx *ctx )
{
if ( !ctx ) return;
tls_imp->ti_ctx_ref( ctx );
}
#ifdef LDAP_R_COMPILE
/*
* an extra mutex for the default ctx.
*/
static ldap_pvt_thread_mutex_t tls_def_ctx_mutex;
#endif
void
ldap_int_tls_destroy( struct ldapoptions *lo )
{
if ( lo->ldo_tls_ctx ) {
ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx );
lo->ldo_tls_ctx = NULL;
}
if ( lo->ldo_tls_certfile ) {
LDAP_FREE( lo->ldo_tls_certfile );
lo->ldo_tls_certfile = NULL;
}
if ( lo->ldo_tls_keyfile ) {
LDAP_FREE( lo->ldo_tls_keyfile );
lo->ldo_tls_keyfile = NULL;
}
if ( lo->ldo_tls_dhfile ) {
LDAP_FREE( lo->ldo_tls_dhfile );
lo->ldo_tls_dhfile = NULL;
}
if ( lo->ldo_tls_ecname ) {
LDAP_FREE( lo->ldo_tls_ecname );
lo->ldo_tls_ecname = NULL;
}
if ( lo->ldo_tls_cacertfile ) {
LDAP_FREE( lo->ldo_tls_cacertfile );
lo->ldo_tls_cacertfile = NULL;
}
if ( lo->ldo_tls_cacertdir ) {
LDAP_FREE( lo->ldo_tls_cacertdir );
lo->ldo_tls_cacertdir = NULL;
}
if ( lo->ldo_tls_ciphersuite ) {
LDAP_FREE( lo->ldo_tls_ciphersuite );
lo->ldo_tls_ciphersuite = NULL;
}
if ( lo->ldo_tls_crlfile ) {
LDAP_FREE( lo->ldo_tls_crlfile );
lo->ldo_tls_crlfile = NULL;
}
}
/*
* Tear down the TLS subsystem. Should only be called once.
*/
void
ldap_pvt_tls_destroy( void )
{
struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT();
ldap_int_tls_destroy( lo );
tls_imp->ti_tls_destroy();
}
/*
* Initialize a particular TLS implementation.
* Called once per implementation.
*/
static int
tls_init(tls_impl *impl )
{
static int tls_initialized = 0;
if ( !tls_initialized++ ) {
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_init( &tls_def_ctx_mutex );
#endif
}
if ( impl->ti_inited++ ) return 0;
#ifdef LDAP_R_COMPILE
impl->ti_thr_init();
#endif
return impl->ti_tls_init();
}
/*
* Initialize TLS subsystem. Called once per implementation.
*/
int
ldap_pvt_tls_init( void )
{
return tls_init( tls_imp );
}
/*
* initialize a new TLS context
*/
static int
ldap_int_tls_init_ctx( struct ldapoptions *lo, int is_server )
{
int rc = 0;
tls_impl *ti = tls_imp;
struct ldaptls lts = lo->ldo_tls_info;
if ( lo->ldo_tls_ctx )
return 0;
tls_init( ti );
if ( is_server && !lts.lt_certfile && !lts.lt_keyfile &&
!lts.lt_cacertfile && !lts.lt_cacertdir ) {
/* minimum configuration not provided */
return LDAP_NOT_SUPPORTED;
}
#ifdef HAVE_EBCDIC
/* This ASCII/EBCDIC handling is a real pain! */
if ( lts.lt_ciphersuite ) {
lts.lt_ciphersuite = LDAP_STRDUP( lts.lt_ciphersuite );
__atoe( lts.lt_ciphersuite );
}
if ( lts.lt_cacertfile ) {
lts.lt_cacertfile = LDAP_STRDUP( lts.lt_cacertfile );
__atoe( lts.lt_cacertfile );
}
if ( lts.lt_certfile ) {
lts.lt_certfile = LDAP_STRDUP( lts.lt_certfile );
__atoe( lts.lt_certfile );
}
if ( lts.lt_keyfile ) {
lts.lt_keyfile = LDAP_STRDUP( lts.lt_keyfile );
__atoe( lts.lt_keyfile );
}
if ( lts.lt_crlfile ) {
lts.lt_crlfile = LDAP_STRDUP( lts.lt_crlfile );
__atoe( lts.lt_crlfile );
}
if ( lts.lt_cacertdir ) {
lts.lt_cacertdir = LDAP_STRDUP( lts.lt_cacertdir );
__atoe( lts.lt_cacertdir );
}
if ( lts.lt_dhfile ) {
lts.lt_dhfile = LDAP_STRDUP( lts.lt_dhfile );
__atoe( lts.lt_dhfile );
}
if ( lts.lt_ecname ) {
lts.lt_ecname = LDAP_STRDUP( lts.lt_ecname );
__atoe( lts.lt_ecname );
}
#endif
lo->ldo_tls_ctx = ti->ti_ctx_new( lo );
if ( lo->ldo_tls_ctx == NULL ) {
Debug( LDAP_DEBUG_ANY,
"TLS: could not allocate default ctx.\n",
0,0,0);
rc = -1;
goto error_exit;
}
rc = ti->ti_ctx_init( lo, <s, is_server );
error_exit:
if ( rc < 0 && lo->ldo_tls_ctx != NULL ) {
ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx );
lo->ldo_tls_ctx = NULL;
}
#ifdef HAVE_EBCDIC
LDAP_FREE( lts.lt_ciphersuite );
LDAP_FREE( lts.lt_cacertfile );
LDAP_FREE( lts.lt_certfile );
LDAP_FREE( lts.lt_keyfile );
LDAP_FREE( lts.lt_crlfile );
LDAP_FREE( lts.lt_cacertdir );
LDAP_FREE( lts.lt_dhfile );
LDAP_FREE( lts.lt_ecname );
#endif
return rc;
}
/*
* initialize the default context
*/
int
ldap_pvt_tls_init_def_ctx( int is_server )
{
struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT();
int rc;
LDAP_MUTEX_LOCK( &tls_def_ctx_mutex );
rc = ldap_int_tls_init_ctx( lo, is_server );
LDAP_MUTEX_UNLOCK( &tls_def_ctx_mutex );
return rc;
}
static tls_session *
alloc_handle( void *ctx_arg, int is_server )
{
tls_ctx *ctx;
tls_session *ssl;
if ( ctx_arg ) {
ctx = ctx_arg;
} else {
struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT();
if ( ldap_pvt_tls_init_def_ctx( is_server ) < 0 ) return NULL;
ctx = lo->ldo_tls_ctx;
}
ssl = tls_imp->ti_session_new( ctx, is_server );
if ( ssl == NULL ) {
Debug( LDAP_DEBUG_ANY,"TLS: can't create ssl handle.\n",0,0,0);
return NULL;
}
return ssl;
}
static int
update_flags( Sockbuf *sb, tls_session * ssl, int rc )
{
sb->sb_trans_needs_read = 0;
sb->sb_trans_needs_write = 0;
return tls_imp->ti_session_upflags( sb, ssl, rc );
}
/*
* 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.
*
* Return value:
*
* 0 - Success. Connection is ready for communication.
* <0 - Error. Can't create a TLS stream.
* >0 - Partial success.
* Do a select (using information from lber_pvt_sb_needs_{read,write}
* and call again.
*/
static int
ldap_int_tls_connect( LDAP *ld, LDAPConn *conn, const char *host )
{
Sockbuf *sb = conn->lconn_sb;
int err;
tls_session *ssl = NULL;
if ( HAS_TLS( sb )) {
ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
} else {
struct ldapoptions *lo;
tls_ctx *ctx;
ctx = ld->ld_options.ldo_tls_ctx;
ssl = alloc_handle( ctx, 0 );
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, tls_imp->ti_sbio,
LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
lo = LDAP_INT_GLOBAL_OPT();
if( ctx == NULL ) {
ctx = lo->ldo_tls_ctx;
ld->ld_options.ldo_tls_ctx = ctx;
tls_ctx_ref( ctx );
}
if ( ld->ld_options.ldo_tls_connect_cb )
ld->ld_options.ldo_tls_connect_cb( ld, ssl, ctx,
ld->ld_options.ldo_tls_connect_arg );
if ( lo && lo->ldo_tls_connect_cb && lo->ldo_tls_connect_cb !=
ld->ld_options.ldo_tls_connect_cb )
lo->ldo_tls_connect_cb( ld, ssl, ctx, lo->ldo_tls_connect_arg );
}
err = tls_imp->ti_session_connect( ld, ssl );
#ifdef HAVE_WINSOCK
errno = WSAGetLastError();
#endif
if ( err == 0 ) {
err = ldap_pvt_tls_check_hostname( ld, ssl, host );
}
if ( err < 0 )
{
char buf[256], *msg;
if ( update_flags( sb, ssl, err )) {
return 1;
}
msg = tls_imp->ti_session_errmsg( ssl, err, buf, sizeof(buf) );
if ( msg ) {
if ( ld->ld_error ) {
LDAP_FREE( ld->ld_error );
}
ld->ld_error = LDAP_STRDUP( msg );
#ifdef HAVE_EBCDIC
if ( ld->ld_error ) __etoa(ld->ld_error);
#endif
}
Debug( LDAP_DEBUG_ANY,"TLS: can't connect: %s.\n",
ld->ld_error ? ld->ld_error : "" ,0,0);
ber_sockbuf_remove_io( sb, tls_imp->ti_sbio,
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;
}
/*
* Call this to do a TLS accept on a sockbuf.
* Everything else is the same as with tls_connect.
*/
int
ldap_pvt_tls_accept( Sockbuf *sb, void *ctx_arg )
{
int err;
tls_session *ssl = NULL;
if ( HAS_TLS( sb )) {
ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
} else {
ssl = alloc_handle( ctx_arg, 1 );
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, tls_imp->ti_sbio,
LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
}
err = tls_imp->ti_session_accept( ssl );
#ifdef HAVE_WINSOCK
errno = WSAGetLastError();
#endif
if ( err < 0 )
{
if ( update_flags( sb, ssl, err )) return 1;
if ( DebugTest( LDAP_DEBUG_ANY ) ) {
char buf[256], *msg;
msg = tls_imp->ti_session_errmsg( ssl, err, buf, sizeof(buf) );
Debug( LDAP_DEBUG_ANY,"TLS: can't accept: %s.\n",
msg ? msg : "(unknown)", 0, 0 );
}
ber_sockbuf_remove_io( sb, tls_imp->ti_sbio,
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;
}
int
ldap_pvt_tls_inplace ( Sockbuf *sb )
{
return HAS_TLS( sb ) ? 1 : 0;
}
int
ldap_tls_inplace( LDAP *ld )
{
Sockbuf *sb = NULL;
if ( ld->ld_defconn && ld->ld_defconn->lconn_sb ) {
sb = ld->ld_defconn->lconn_sb;
} else if ( ld->ld_sb ) {
sb = ld->ld_sb;
} else {
return 0;
}
return ldap_pvt_tls_inplace( sb );
}
int
ldap_pvt_tls_get_peer_dn( void *s, struct berval *dn,
LDAPDN_rewrite_dummy *func, unsigned flags )
{
tls_session *session = s;
struct berval bvdn;
int rc;
rc = tls_imp->ti_session_peer_dn( session, &bvdn );
if ( rc ) return rc;
rc = ldap_X509dn2bv( &bvdn, dn,
(LDAPDN_rewrite_func *)func, flags);
return rc;
}
int
ldap_pvt_tls_check_hostname( LDAP *ld, void *s, const char *name_in )
{
tls_session *session = s;
if (ld->ld_options.ldo_tls_require_cert != LDAP_OPT_X_TLS_NEVER &&
ld->ld_options.ldo_tls_require_cert != LDAP_OPT_X_TLS_ALLOW) {
ld->ld_errno = tls_imp->ti_session_chkhost( ld, session, name_in );
if (ld->ld_errno != LDAP_SUCCESS) {
return ld->ld_errno;
}
}
return LDAP_SUCCESS;
}
int
ldap_int_tls_config( LDAP *ld, int option, const char *arg )
{
int i;
switch( option ) {
case LDAP_OPT_X_TLS_CACERTFILE:
case LDAP_OPT_X_TLS_CACERTDIR:
case LDAP_OPT_X_TLS_CERTFILE:
case LDAP_OPT_X_TLS_KEYFILE:
case LDAP_OPT_X_TLS_RANDOM_FILE:
case LDAP_OPT_X_TLS_CIPHER_SUITE:
case LDAP_OPT_X_TLS_DHFILE:
case LDAP_OPT_X_TLS_CRLFILE: /* GnuTLS only */
return ldap_pvt_tls_set_option( ld, option, (void *) arg );
case LDAP_OPT_X_TLS_REQUIRE_CERT:
case LDAP_OPT_X_TLS:
i = -1;
if ( strcasecmp( arg, "never" ) == 0 ) {
i = LDAP_OPT_X_TLS_NEVER ;
} else if ( strcasecmp( arg, "demand" ) == 0 ) {
i = LDAP_OPT_X_TLS_DEMAND ;
} else if ( strcasecmp( arg, "allow" ) == 0 ) {
i = LDAP_OPT_X_TLS_ALLOW ;
} else if ( strcasecmp( arg, "try" ) == 0 ) {
i = LDAP_OPT_X_TLS_TRY ;
} else if ( ( strcasecmp( arg, "hard" ) == 0 ) ||
( strcasecmp( arg, "on" ) == 0 ) ||
( strcasecmp( arg, "yes" ) == 0) ||
( strcasecmp( arg, "true" ) == 0 ) )
{
i = LDAP_OPT_X_TLS_HARD ;
}
if (i >= 0) {
return ldap_pvt_tls_set_option( ld, option, &i );
}
return -1;
case LDAP_OPT_X_TLS_PROTOCOL_MIN: {
char *next;
long l;
l = strtol( arg, &next, 10 );
if ( l < 0 || l > 0xff || next == arg ||
( *next != '\0' && *next != '.' ) )
return -1;
i = l << 8;
if (*next == '.') {
arg = next + 1;
l = strtol( arg, &next, 10 );
if ( l < 0 || l > 0xff || next == arg || *next != '\0' )
return -1;
i += l;
}
return ldap_pvt_tls_set_option( ld, option, &i );
}
#ifdef HAVE_OPENSSL_CRL
case LDAP_OPT_X_TLS_CRLCHECK: /* OpenSSL only */
i = -1;
if ( strcasecmp( arg, "none" ) == 0 ) {
i = LDAP_OPT_X_TLS_CRL_NONE ;
} else if ( strcasecmp( arg, "peer" ) == 0 ) {
i = LDAP_OPT_X_TLS_CRL_PEER ;
} else if ( strcasecmp( arg, "all" ) == 0 ) {
i = LDAP_OPT_X_TLS_CRL_ALL ;
}
if (i >= 0) {
return ldap_pvt_tls_set_option( ld, option, &i );
}
return -1;
#endif
}
return -1;
}
int
ldap_pvt_tls_get_option( LDAP *ld, int option, void *arg )
{
struct ldapoptions *lo;
if( option == LDAP_OPT_X_TLS_PACKAGE ) {
*(char **)arg = LDAP_STRDUP( tls_imp->ti_name );
return 0;
}
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_CTX:
*(void **)arg = lo->ldo_tls_ctx;
if ( lo->ldo_tls_ctx ) {
tls_ctx_ref( lo->ldo_tls_ctx );
}
break;
case LDAP_OPT_X_TLS_CACERTFILE:
*(char **)arg = lo->ldo_tls_cacertfile ?
LDAP_STRDUP( lo->ldo_tls_cacertfile ) : NULL;
break;
case LDAP_OPT_X_TLS_CACERTDIR:
*(char **)arg = lo->ldo_tls_cacertdir ?
LDAP_STRDUP( lo->ldo_tls_cacertdir ) : NULL;
break;
case LDAP_OPT_X_TLS_CERTFILE:
*(char **)arg = lo->ldo_tls_certfile ?
LDAP_STRDUP( lo->ldo_tls_certfile ) : NULL;
break;
case LDAP_OPT_X_TLS_KEYFILE:
*(char **)arg = lo->ldo_tls_keyfile ?
LDAP_STRDUP( lo->ldo_tls_keyfile ) : NULL;
break;
case LDAP_OPT_X_TLS_DHFILE:
*(char **)arg = lo->ldo_tls_dhfile ?
LDAP_STRDUP( lo->ldo_tls_dhfile ) : NULL;
break;
case LDAP_OPT_X_TLS_ECNAME:
*(char **)arg = lo->ldo_tls_ecname ?
LDAP_STRDUP( lo->ldo_tls_ecname ) : NULL;
break;
case LDAP_OPT_X_TLS_CRLFILE: /* GnuTLS only */
*(char **)arg = lo->ldo_tls_crlfile ?
LDAP_STRDUP( lo->ldo_tls_crlfile ) : NULL;
break;
case LDAP_OPT_X_TLS_REQUIRE_CERT:
*(int *)arg = lo->ldo_tls_require_cert;
break;
#ifdef HAVE_OPENSSL_CRL
case LDAP_OPT_X_TLS_CRLCHECK: /* OpenSSL only */
*(int *)arg = lo->ldo_tls_crlcheck;
break;
#endif
case LDAP_OPT_X_TLS_CIPHER_SUITE:
*(char **)arg = lo->ldo_tls_ciphersuite ?
LDAP_STRDUP( lo->ldo_tls_ciphersuite ) : NULL;
break;
case LDAP_OPT_X_TLS_PROTOCOL_MIN:
*(int *)arg = lo->ldo_tls_protocol_min;
break;
case LDAP_OPT_X_TLS_RANDOM_FILE:
*(char **)arg = lo->ldo_tls_randfile ?
LDAP_STRDUP( lo->ldo_tls_randfile ) : NULL;
break;
case LDAP_OPT_X_TLS_SSL_CTX: {
void *retval = 0;
if ( ld != NULL ) {
LDAPConn *conn = ld->ld_defconn;
if ( conn != NULL ) {
Sockbuf *sb = conn->lconn_sb;
retval = ldap_pvt_tls_sb_ctx( sb );
}
}
*(void **)arg = retval;
break;
}
case LDAP_OPT_X_TLS_CONNECT_CB:
*(LDAP_TLS_CONNECT_CB **)arg = lo->ldo_tls_connect_cb;
break;
case LDAP_OPT_X_TLS_CONNECT_ARG:
*(void **)arg = lo->ldo_tls_connect_arg;
break;
default:
return -1;
}
return 0;
}
int
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:
if ( !arg ) return -1;
switch( *(int *) arg ) {
case LDAP_OPT_X_TLS_NEVER:
case LDAP_OPT_X_TLS_DEMAND:
case LDAP_OPT_X_TLS_ALLOW:
case LDAP_OPT_X_TLS_TRY:
case LDAP_OPT_X_TLS_HARD:
if (lo != NULL) {
lo->ldo_tls_mode = *(int *)arg;
}
return 0;
}
return -1;
case LDAP_OPT_X_TLS_CTX:
if ( lo->ldo_tls_ctx )
ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx );
lo->ldo_tls_ctx = arg;
tls_ctx_ref( lo->ldo_tls_ctx );
return 0;
case LDAP_OPT_X_TLS_CONNECT_CB:
lo->ldo_tls_connect_cb = (LDAP_TLS_CONNECT_CB *)arg;
return 0;
case LDAP_OPT_X_TLS_CONNECT_ARG:
lo->ldo_tls_connect_arg = arg;
return 0;
case LDAP_OPT_X_TLS_CACERTFILE:
if ( lo->ldo_tls_cacertfile ) LDAP_FREE( lo->ldo_tls_cacertfile );
lo->ldo_tls_cacertfile = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL;
return 0;
case LDAP_OPT_X_TLS_CACERTDIR:
if ( lo->ldo_tls_cacertdir ) LDAP_FREE( lo->ldo_tls_cacertdir );
lo->ldo_tls_cacertdir = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL;
return 0;
case LDAP_OPT_X_TLS_CERTFILE:
if ( lo->ldo_tls_certfile ) LDAP_FREE( lo->ldo_tls_certfile );
lo->ldo_tls_certfile = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL;
return 0;
case LDAP_OPT_X_TLS_KEYFILE:
if ( lo->ldo_tls_keyfile ) LDAP_FREE( lo->ldo_tls_keyfile );
lo->ldo_tls_keyfile = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL;
return 0;
case LDAP_OPT_X_TLS_DHFILE:
if ( lo->ldo_tls_dhfile ) LDAP_FREE( lo->ldo_tls_dhfile );
lo->ldo_tls_dhfile = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL;
return 0;
case LDAP_OPT_X_TLS_ECNAME:
if ( lo->ldo_tls_ecname ) LDAP_FREE( lo->ldo_tls_ecname );
lo->ldo_tls_ecname = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL;
return 0;
case LDAP_OPT_X_TLS_CRLFILE: /* GnuTLS only */
if ( lo->ldo_tls_crlfile ) LDAP_FREE( lo->ldo_tls_crlfile );
lo->ldo_tls_crlfile = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL;
return 0;
case LDAP_OPT_X_TLS_REQUIRE_CERT:
if ( !arg ) return -1;
switch( *(int *) arg ) {
case LDAP_OPT_X_TLS_NEVER:
case LDAP_OPT_X_TLS_DEMAND:
case LDAP_OPT_X_TLS_ALLOW:
case LDAP_OPT_X_TLS_TRY:
case LDAP_OPT_X_TLS_HARD:
lo->ldo_tls_require_cert = * (int *) arg;
return 0;
}
return -1;
#ifdef HAVE_OPENSSL_CRL
case LDAP_OPT_X_TLS_CRLCHECK: /* OpenSSL only */
if ( !arg ) return -1;
switch( *(int *) arg ) {
case LDAP_OPT_X_TLS_CRL_NONE:
case LDAP_OPT_X_TLS_CRL_PEER:
case LDAP_OPT_X_TLS_CRL_ALL:
lo->ldo_tls_crlcheck = * (int *) arg;
return 0;
}
return -1;
#endif
case LDAP_OPT_X_TLS_CIPHER_SUITE:
if ( lo->ldo_tls_ciphersuite ) LDAP_FREE( lo->ldo_tls_ciphersuite );
lo->ldo_tls_ciphersuite = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL;
return 0;
case LDAP_OPT_X_TLS_PROTOCOL_MIN:
if ( !arg ) return -1;
lo->ldo_tls_protocol_min = *(int *)arg;
return 0;
case LDAP_OPT_X_TLS_RANDOM_FILE:
if ( ld != NULL )
return -1;
if ( lo->ldo_tls_randfile ) LDAP_FREE (lo->ldo_tls_randfile );
lo->ldo_tls_randfile = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL;
break;
case LDAP_OPT_X_TLS_NEWCTX:
if ( !arg ) return -1;
if ( lo->ldo_tls_ctx )
ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx );
lo->ldo_tls_ctx = NULL;
return ldap_int_tls_init_ctx( lo, *(int *)arg );
default:
return -1;
}
return 0;
}
int
ldap_int_tls_start ( LDAP *ld, LDAPConn *conn, LDAPURLDesc *srv )
{
Sockbuf *sb;
char *host;
void *ssl;
int ret, async;
#ifdef LDAP_USE_NON_BLOCKING_TLS
struct timeval start_time_tv, tv, tv0;
ber_socket_t sd = AC_SOCKET_ERROR;
#endif /* LDAP_USE_NON_BLOCKING_TLS */
if ( !conn )
return LDAP_PARAM_ERROR;
sb = conn->lconn_sb;
if( srv ) {
host = srv->lud_host;
} else {
host = conn->lconn_server->lud_host;
}
/* avoid NULL host */
if( host == NULL ) {
host = "localhost";
}
(void) tls_init( tls_imp );
#ifdef LDAP_USE_NON_BLOCKING_TLS
/*
* Use non-blocking io during SSL Handshake when a timeout is configured
*/
async = LDAP_BOOL_GET( &ld->ld_options, LDAP_BOOL_CONNECT_ASYNC );
if ( ld->ld_options.ldo_tm_net.tv_sec >= 0 ) {
if ( !async ) {
/* if async, this has already been set */
ber_sockbuf_ctrl( sb, LBER_SB_OPT_SET_NONBLOCK, (void*)1 );
}
ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
tv = ld->ld_options.ldo_tm_net;
tv0 = tv;
#ifdef HAVE_GETTIMEOFDAY
gettimeofday( &start_time_tv, NULL );
#else /* ! HAVE_GETTIMEOFDAY */
time( &start_time_tv.tv_sec );
start_time_tv.tv_usec = 0;
#endif /* ! HAVE_GETTIMEOFDAY */
}
#endif /* LDAP_USE_NON_BLOCKING_TLS */
ld->ld_errno = LDAP_SUCCESS;
ret = ldap_int_tls_connect( ld, conn, host );
#ifdef LDAP_USE_NON_BLOCKING_TLS
while ( ret > 0 ) { /* this should only happen for non-blocking io */
int wr=0;
if ( sb->sb_trans_needs_read ) {
wr=0;
} else if ( sb->sb_trans_needs_write ) {
wr=1;
}
Debug( LDAP_DEBUG_TRACE, "ldap_int_tls_start: ldap_int_tls_connect needs %s\n",
wr ? "write": "read", 0, 0);
ret = ldap_int_poll( ld, sd, &tv, wr);
if ( ret < 0 ) {
ld->ld_errno = LDAP_TIMEOUT;
break;
} else {
/* ldap_int_poll called ldap_pvt_ndelay_off if not async */
if ( !async ) {
ber_sockbuf_ctrl( sb, LBER_SB_OPT_SET_NONBLOCK, (void*)1 );
}
ret = ldap_int_tls_connect( ld, conn, host );
if ( ret > 0 ) { /* need to call tls_connect once more */
struct timeval curr_time_tv, delta_tv;
/* This is mostly copied from result.c:wait4msg(), should
* probably be moved into a separate function */
#ifdef HAVE_GETTIMEOFDAY
gettimeofday( &curr_time_tv, NULL );
#else /* ! HAVE_GETTIMEOFDAY */
time( &curr_time_tv.tv_sec );
curr_time_tv.tv_usec = 0;
#endif /* ! HAVE_GETTIMEOFDAY */
/* delta = curr - start */
delta_tv.tv_sec = curr_time_tv.tv_sec - start_time_tv.tv_sec;
delta_tv.tv_usec = curr_time_tv.tv_usec - start_time_tv.tv_usec;
if ( delta_tv.tv_usec < 0 ) {
delta_tv.tv_sec--;
delta_tv.tv_usec += 1000000;
}
/* tv0 < delta ? */
if ( ( tv0.tv_sec < delta_tv.tv_sec ) ||
( ( tv0.tv_sec == delta_tv.tv_sec ) &&
( tv0.tv_usec < delta_tv.tv_usec ) ) )
{
ret = -1;
ld->ld_errno = LDAP_TIMEOUT;
break;
} else {
/* timeout -= delta_time */
tv0.tv_sec -= delta_tv.tv_sec;
tv0.tv_usec -= delta_tv.tv_usec;
if ( tv0.tv_usec < 0 ) {
tv0.tv_sec--;
tv0.tv_usec += 1000000;
}
start_time_tv.tv_sec = curr_time_tv.tv_sec;
start_time_tv.tv_usec = curr_time_tv.tv_usec;
}
tv = tv0;
Debug( LDAP_DEBUG_TRACE, "ldap_int_tls_start: ld %p %ld s %ld us to go\n",
(void *)ld, (long) tv.tv_sec, (long) tv.tv_usec );
}
}
}
/* Leave it nonblocking if async */
if ( !async && ld->ld_options.ldo_tm_net.tv_sec >= 0 ) {
ber_sockbuf_ctrl( sb, LBER_SB_OPT_SET_NONBLOCK, NULL );
}
#endif /* LDAP_USE_NON_BLOCKING_TLS */
if ( ret < 0 ) {
if ( ld->ld_errno == LDAP_SUCCESS )
ld->ld_errno = LDAP_CONNECT_ERROR;
return (ld->ld_errno);
}
return LDAP_SUCCESS;
}
void *
ldap_pvt_tls_sb_ctx( Sockbuf *sb )
{
void *p = NULL;
ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&p );
return p;
}
int
ldap_pvt_tls_get_strength( void *s )
{
tls_session *session = s;
return tls_imp->ti_session_strength( session );
}
int
ldap_pvt_tls_get_my_dn( void *s, struct berval *dn, LDAPDN_rewrite_dummy *func, unsigned flags )
{
tls_session *session = s;
struct berval der_dn;
int rc;
rc = tls_imp->ti_session_my_dn( session, &der_dn );
if ( rc == LDAP_SUCCESS )
rc = ldap_X509dn2bv(&der_dn, dn, (LDAPDN_rewrite_func *)func, flags );
return rc;
}
#endif /* HAVE_TLS */
int
ldap_start_tls( LDAP *ld,
LDAPControl **serverctrls,
LDAPControl **clientctrls,
int *msgidp )
{
return ldap_extended_operation( ld, LDAP_EXOP_START_TLS,
NULL, serverctrls, clientctrls, msgidp );
}
int
ldap_install_tls( LDAP *ld )
{
#ifndef HAVE_TLS
return LDAP_NOT_SUPPORTED;
#else
if ( ldap_tls_inplace( ld ) ) {
return LDAP_LOCAL_ERROR;
}
return ldap_int_tls_start( ld, ld->ld_defconn, NULL );
#endif
}
int
ldap_start_tls_s ( LDAP *ld,
LDAPControl **serverctrls,
LDAPControl **clientctrls )
{
#ifndef HAVE_TLS
return LDAP_NOT_SUPPORTED;
#else
int rc;
char *rspoid = NULL;
struct berval *rspdata = NULL;
/* XXYYZ: this initiates operation only on default connection! */
if ( ldap_tls_inplace( ld ) ) {
return LDAP_LOCAL_ERROR;
}
rc = ldap_extended_operation_s( ld, LDAP_EXOP_START_TLS,
NULL, serverctrls, clientctrls, &rspoid, &rspdata );
if ( rspoid != NULL ) {
LDAP_FREE(rspoid);
}
if ( rspdata != NULL ) {
ber_bvfree( rspdata );
}
if ( rc == LDAP_SUCCESS ) {
rc = ldap_int_tls_start( ld, ld->ld_defconn, NULL );
}
return rc;
#endif
}
/* These tags probably all belong in lber.h, but they're
* not normally encountered when processing LDAP, so maybe
* they belong somewhere else instead.
*/
#define LBER_TAG_OID ((ber_tag_t) 0x06UL)
/* Tags for string types used in a DirectoryString.
*
* Note that IA5string is not one of the defined choices for
* DirectoryString in X.520, but it gets used for email AVAs.
*/
#define LBER_TAG_UTF8 ((ber_tag_t) 0x0cUL)
#define LBER_TAG_PRINTABLE ((ber_tag_t) 0x13UL)
#define LBER_TAG_TELETEX ((ber_tag_t) 0x14UL)
#define LBER_TAG_IA5 ((ber_tag_t) 0x16UL)
#define LBER_TAG_UNIVERSAL ((ber_tag_t) 0x1cUL)
#define LBER_TAG_BMP ((ber_tag_t) 0x1eUL)
static oid_name *
find_oid( struct berval *oid )
{
int i;
for ( i=0; !BER_BVISNULL( &oids[i].oid ); i++ ) {
if ( oids[i].oid.bv_len != oid->bv_len ) continue;
if ( !strcmp( oids[i].oid.bv_val, oid->bv_val ))
return &oids[i];
}
return NULL;
}
/* Converts BER Bitstring value to LDAP BitString value (RFC4517)
*
* berValue : IN
* rfc4517Value: OUT
*
* berValue and ldapValue should not be NULL
*/
#define BITS_PER_BYTE 8
#define SQUOTE_LENGTH 1
#define B_CHAR_LENGTH 1
#define STR_OVERHEAD (2*SQUOTE_LENGTH + B_CHAR_LENGTH)
static int
der_to_ldap_BitString (struct berval *berValue,
struct berval *ldapValue)
{
ber_len_t bitPadding=0;
ber_len_t bits, maxBits;
char *tmpStr;
unsigned char byte;
ber_len_t bitLength;
ber_len_t valLen;
unsigned char* valPtr;
ldapValue->bv_len=0;
ldapValue->bv_val=NULL;
/* Gets padding and points to binary data */
valLen=berValue->bv_len;
valPtr=(unsigned char*)berValue->bv_val;
if (valLen) {
bitPadding=(ber_len_t)(valPtr[0]);
valLen--;
valPtr++;
}
/* If Block is non DER encoding fixes to DER encoding */
if (bitPadding >= BITS_PER_BYTE) {
if (valLen*BITS_PER_BYTE > bitPadding ) {
valLen-=(bitPadding/BITS_PER_BYTE);
bitPadding%=BITS_PER_BYTE;
} else {
valLen=0;
bitPadding=0;
}
}
/* Just in case bad encoding */
if (valLen*BITS_PER_BYTE < bitPadding ) {
bitPadding=0;
valLen=0;
}
/* Gets buffer to hold RFC4517 Bit String format */
bitLength=valLen*BITS_PER_BYTE-bitPadding;
tmpStr=LDAP_MALLOC(bitLength + STR_OVERHEAD + 1);
if (!tmpStr)
return LDAP_NO_MEMORY;
ldapValue->bv_val=tmpStr;
ldapValue->bv_len=bitLength + STR_OVERHEAD;
/* Formatting in '*binary-digit'B format */
maxBits=BITS_PER_BYTE;
*tmpStr++ ='\'';
while(valLen) {
byte=*valPtr;
if (valLen==1)
maxBits-=bitPadding;
for (bits=0; bits<maxBits; bits++) {
if (0x80 & byte)
*tmpStr='1';
else
*tmpStr='0';
tmpStr++;
byte<<=1;
}
valPtr++;
valLen--;
}
*tmpStr++ ='\'';
*tmpStr++ ='B';
*tmpStr=0;
return LDAP_SUCCESS;
}
/* Convert a structured DN from an X.509 certificate into an LDAPV3 DN.
* x509_name must be raw DER. If func is non-NULL, the
* constructed DN will use numeric OIDs to identify attributeTypes,
* and the func() will be invoked to rewrite the DN with the given
* flags.
*
* Otherwise the DN will use shortNames from a hardcoded table.
*/
int
ldap_X509dn2bv( void *x509_name, struct berval *bv, LDAPDN_rewrite_func *func,
unsigned flags )
{
LDAPDN newDN;
LDAPRDN newRDN;
LDAPAVA *newAVA, *baseAVA;
BerElementBuffer berbuf;
BerElement *ber = (BerElement *)&berbuf;
char oids[8192], *oidptr = oids, *oidbuf = NULL;
void *ptrs[2048];
char *dn_end, *rdn_end;
int i, navas, nrdns, rc = LDAP_SUCCESS;
size_t dnsize, oidrem = sizeof(oids), oidsize = 0;
int csize;
ber_tag_t tag;
ber_len_t len;
oid_name *oidname;
struct berval Oid, Val, oid2, *in = x509_name;
assert( bv != NULL );
bv->bv_len = 0;
bv->bv_val = NULL;
navas = 0;
nrdns = 0;
/* A DN is a SEQUENCE of RDNs. An RDN is a SET of AVAs.
* An AVA is a SEQUENCE of attr and value.
* Count the number of AVAs and RDNs
*/
ber_init2( ber, in, LBER_USE_DER );
tag = ber_peek_tag( ber, &len );
if ( tag != LBER_SEQUENCE )
return LDAP_DECODING_ERROR;
for ( tag = ber_first_element( ber, &len, &dn_end );
tag == LBER_SET;
tag = ber_next_element( ber, &len, dn_end )) {
nrdns++;
for ( tag = ber_first_element( ber, &len, &rdn_end );
tag == LBER_SEQUENCE;
tag = ber_next_element( ber, &len, rdn_end )) {
tag = ber_skip_tag( ber, &len );
ber_skip_data( ber, len );
navas++;
}
}
/* Allocate the DN/RDN/AVA stuff as a single block */
dnsize = sizeof(LDAPRDN) * (nrdns+1);
dnsize += sizeof(LDAPAVA *) * (navas+nrdns);
dnsize += sizeof(LDAPAVA) * navas;
if (dnsize > sizeof(ptrs)) {
newDN = (LDAPDN)LDAP_MALLOC( dnsize );
if ( newDN == NULL )
return LDAP_NO_MEMORY;
} else {
newDN = (LDAPDN)(char *)ptrs;
}
newDN[nrdns] = NULL;
newRDN = (LDAPRDN)(newDN + nrdns+1);
newAVA = (LDAPAVA *)(newRDN + navas + nrdns);
baseAVA = newAVA;
/* Rewind and start extracting */
ber_rewind( ber );
tag = ber_first_element( ber, &len, &dn_end );
for ( i = nrdns - 1; i >= 0; i-- ) {
newDN[i] = newRDN;
for ( tag = ber_first_element( ber, &len, &rdn_end );
tag == LBER_SEQUENCE;
tag = ber_next_element( ber, &len, rdn_end )) {
*newRDN++ = newAVA;
tag = ber_skip_tag( ber, &len );
tag = ber_get_stringbv( ber, &Oid, LBER_BV_NOTERM );
if ( tag != LBER_TAG_OID ) {
rc = LDAP_DECODING_ERROR;
goto nomem;
}
oid2.bv_val = oidptr;
oid2.bv_len = oidrem;
if ( ber_decode_oid( &Oid, &oid2 ) < 0 ) {
rc = LDAP_DECODING_ERROR;
goto nomem;
}
oidname = find_oid( &oid2 );
if ( !oidname ) {
newAVA->la_attr = oid2;
oidptr += oid2.bv_len + 1;
oidrem -= oid2.bv_len + 1;
/* Running out of OID buffer space? */
if (oidrem < 128) {
if ( oidsize == 0 ) {
oidsize = sizeof(oids) * 2;
oidrem = oidsize;
oidbuf = LDAP_MALLOC( oidsize );
if ( oidbuf == NULL ) goto nomem;
oidptr = oidbuf;
} else {
char *old = oidbuf;
oidbuf = LDAP_REALLOC( oidbuf, oidsize*2 );
if ( oidbuf == NULL ) goto nomem;
/* Buffer moved! Fix AVA pointers */
if ( old != oidbuf ) {
LDAPAVA *a;
long dif = oidbuf - old;
for (a=baseAVA; a<=newAVA; a++){
if (a->la_attr.bv_val >= old &&
a->la_attr.bv_val <= (old + oidsize))
a->la_attr.bv_val += dif;
}
}
oidptr = oidbuf + oidsize - oidrem;
oidrem += oidsize;
oidsize *= 2;
}
}
} else {
if ( func ) {
newAVA->la_attr = oidname->oid;
} else {
newAVA->la_attr = oidname->name;
}
}
newAVA->la_private = NULL;
newAVA->la_flags = LDAP_AVA_STRING;
tag = ber_get_stringbv( ber, &Val, LBER_BV_NOTERM );
switch(tag) {
case LBER_TAG_UNIVERSAL:
/* This uses 32-bit ISO 10646-1 */
csize = 4; goto to_utf8;
case LBER_TAG_BMP:
/* This uses 16-bit ISO 10646-1 */
csize = 2; goto to_utf8;
case LBER_TAG_TELETEX:
/* This uses 8-bit, assume ISO 8859-1 */
csize = 1;
to_utf8: rc = ldap_ucs_to_utf8s( &Val, csize, &newAVA->la_value );
newAVA->la_flags |= LDAP_AVA_NONPRINTABLE;
allocd:
newAVA->la_flags |= LDAP_AVA_FREE_VALUE;
if (rc != LDAP_SUCCESS) goto nomem;
break;
case LBER_TAG_UTF8:
newAVA->la_flags |= LDAP_AVA_NONPRINTABLE;
/* This is already in UTF-8 encoding */
case LBER_TAG_IA5:
case LBER_TAG_PRINTABLE:
/* These are always 7-bit strings */
newAVA->la_value = Val;
break;
case LBER_BITSTRING:
/* X.690 bitString value converted to RFC4517 Bit String */
rc = der_to_ldap_BitString( &Val, &newAVA->la_value );
goto allocd;
default:
/* Not a string type at all */
newAVA->la_flags = 0;
newAVA->la_value = Val;
break;
}
newAVA++;
}
*newRDN++ = NULL;
tag = ber_next_element( ber, &len, dn_end );
}
if ( func ) {
rc = func( newDN, flags, NULL );
if ( rc != LDAP_SUCCESS )
goto nomem;
}
rc = ldap_dn2bv_x( newDN, bv, LDAP_DN_FORMAT_LDAPV3, NULL );
nomem:
for (;baseAVA < newAVA; baseAVA++) {
if (baseAVA->la_flags & LDAP_AVA_FREE_ATTR)
LDAP_FREE( baseAVA->la_attr.bv_val );
if (baseAVA->la_flags & LDAP_AVA_FREE_VALUE)
LDAP_FREE( baseAVA->la_value.bv_val );
}
if ( oidsize != 0 )
LDAP_FREE( oidbuf );
if ( newDN != (LDAPDN)(char *) ptrs )
LDAP_FREE( newDN );
return rc;
}