539 lines
15 KiB
C
539 lines
15 KiB
C
/*
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* GnuTLS-based implementation of the schannel (SSL/TLS) provider.
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*
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* Copyright 2005 Juan Lang
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* Copyright 2008 Henri Verbeet
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <stdarg.h>
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#ifdef SONAME_LIBGNUTLS
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#include <gnutls/gnutls.h>
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#include <gnutls/crypto.h>
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#endif
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#include "windef.h"
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#include "winbase.h"
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#include "sspi.h"
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#include "schannel.h"
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#include "secur32_priv.h"
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#include "wine/debug.h"
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#include "wine/library.h"
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WINE_DEFAULT_DEBUG_CHANNEL(secur32);
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#if defined(SONAME_LIBGNUTLS) && !defined(HAVE_SECURITY_SECURITY_H)
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static void *libgnutls_handle;
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#define MAKE_FUNCPTR(f) static typeof(f) * p##f
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MAKE_FUNCPTR(gnutls_alert_get);
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MAKE_FUNCPTR(gnutls_alert_get_name);
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MAKE_FUNCPTR(gnutls_certificate_allocate_credentials);
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MAKE_FUNCPTR(gnutls_certificate_free_credentials);
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MAKE_FUNCPTR(gnutls_certificate_get_peers);
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MAKE_FUNCPTR(gnutls_cipher_get);
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MAKE_FUNCPTR(gnutls_cipher_get_key_size);
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MAKE_FUNCPTR(gnutls_credentials_set);
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MAKE_FUNCPTR(gnutls_deinit);
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MAKE_FUNCPTR(gnutls_global_deinit);
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MAKE_FUNCPTR(gnutls_global_init);
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MAKE_FUNCPTR(gnutls_global_set_log_function);
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MAKE_FUNCPTR(gnutls_global_set_log_level);
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MAKE_FUNCPTR(gnutls_handshake);
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MAKE_FUNCPTR(gnutls_init);
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MAKE_FUNCPTR(gnutls_kx_get);
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MAKE_FUNCPTR(gnutls_mac_get);
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MAKE_FUNCPTR(gnutls_mac_get_key_size);
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MAKE_FUNCPTR(gnutls_perror);
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MAKE_FUNCPTR(gnutls_protocol_get_version);
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MAKE_FUNCPTR(gnutls_priority_set_direct);
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MAKE_FUNCPTR(gnutls_record_get_max_size);
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MAKE_FUNCPTR(gnutls_record_recv);
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MAKE_FUNCPTR(gnutls_record_send);
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MAKE_FUNCPTR(gnutls_server_name_set);
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MAKE_FUNCPTR(gnutls_transport_get_ptr);
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MAKE_FUNCPTR(gnutls_transport_set_errno);
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MAKE_FUNCPTR(gnutls_transport_set_ptr);
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MAKE_FUNCPTR(gnutls_transport_set_pull_function);
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MAKE_FUNCPTR(gnutls_transport_set_push_function);
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#undef MAKE_FUNCPTR
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static ssize_t schan_pull_adapter(gnutls_transport_ptr_t transport,
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void *buff, size_t buff_len)
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{
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struct schan_transport *t = (struct schan_transport*)transport;
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gnutls_session_t s = (gnutls_session_t)schan_session_for_transport(t);
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int ret = schan_pull(transport, buff, &buff_len);
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if (ret)
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{
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pgnutls_transport_set_errno(s, ret);
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return -1;
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}
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return buff_len;
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}
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static ssize_t schan_push_adapter(gnutls_transport_ptr_t transport,
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const void *buff, size_t buff_len)
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{
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struct schan_transport *t = (struct schan_transport*)transport;
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gnutls_session_t s = (gnutls_session_t)schan_session_for_transport(t);
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int ret = schan_push(transport, buff, &buff_len);
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if (ret)
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{
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pgnutls_transport_set_errno(s, ret);
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return -1;
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}
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return buff_len;
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}
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static const struct {
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DWORD enable_flag;
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const char *gnutls_flag;
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} protocol_priority_flags[] = {
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{SP_PROT_TLS1_2_CLIENT, "VERS-TLS1.2"},
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{SP_PROT_TLS1_1_CLIENT, "VERS-TLS1.1"},
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{SP_PROT_TLS1_0_CLIENT, "VERS-TLS1.0"},
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{SP_PROT_SSL3_CLIENT, "VERS-SSL3.0"}
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/* {SP_PROT_SSL2_CLIENT} is not supported by GnuTLS */
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};
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DWORD schan_imp_enabled_protocols(void)
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{
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/* NOTE: No support for SSL 2.0 */
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return SP_PROT_SSL3_CLIENT | SP_PROT_TLS1_0_CLIENT | SP_PROT_TLS1_1_CLIENT | SP_PROT_TLS1_2_CLIENT;
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}
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BOOL schan_imp_create_session(schan_imp_session *session, schan_credentials *cred)
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{
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gnutls_session_t *s = (gnutls_session_t*)session;
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char priority[64] = "NORMAL", *p;
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unsigned i;
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int err = pgnutls_init(s, cred->credential_use == SECPKG_CRED_INBOUND ? GNUTLS_SERVER : GNUTLS_CLIENT);
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if (err != GNUTLS_E_SUCCESS)
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{
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pgnutls_perror(err);
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return FALSE;
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}
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p = priority + strlen(priority);
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for(i=0; i < sizeof(protocol_priority_flags)/sizeof(*protocol_priority_flags); i++) {
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*p++ = ':';
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*p++ = (cred->enabled_protocols & protocol_priority_flags[i].enable_flag) ? '+' : '-';
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strcpy(p, protocol_priority_flags[i].gnutls_flag);
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p += strlen(p);
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}
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TRACE("Using %s priority\n", debugstr_a(priority));
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err = pgnutls_priority_set_direct(*s, priority, NULL);
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if (err != GNUTLS_E_SUCCESS)
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{
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pgnutls_perror(err);
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pgnutls_deinit(*s);
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return FALSE;
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}
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err = pgnutls_credentials_set(*s, GNUTLS_CRD_CERTIFICATE,
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(gnutls_certificate_credentials_t)cred->credentials);
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if (err != GNUTLS_E_SUCCESS)
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{
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pgnutls_perror(err);
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pgnutls_deinit(*s);
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return FALSE;
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}
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pgnutls_transport_set_pull_function(*s, schan_pull_adapter);
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pgnutls_transport_set_push_function(*s, schan_push_adapter);
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return TRUE;
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}
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void schan_imp_dispose_session(schan_imp_session session)
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{
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gnutls_session_t s = (gnutls_session_t)session;
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pgnutls_deinit(s);
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}
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void schan_imp_set_session_transport(schan_imp_session session,
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struct schan_transport *t)
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{
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gnutls_session_t s = (gnutls_session_t)session;
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pgnutls_transport_set_ptr(s, (gnutls_transport_ptr_t)t);
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}
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void schan_imp_set_session_target(schan_imp_session session, const char *target)
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{
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gnutls_session_t s = (gnutls_session_t)session;
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pgnutls_server_name_set( s, GNUTLS_NAME_DNS, target, strlen(target) );
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}
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SECURITY_STATUS schan_imp_handshake(schan_imp_session session)
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{
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gnutls_session_t s = (gnutls_session_t)session;
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int err = pgnutls_handshake(s);
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switch(err)
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{
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case GNUTLS_E_SUCCESS:
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TRACE("Handshake completed\n");
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return SEC_E_OK;
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case GNUTLS_E_AGAIN:
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TRACE("Continue...\n");
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return SEC_I_CONTINUE_NEEDED;
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case GNUTLS_E_WARNING_ALERT_RECEIVED:
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case GNUTLS_E_FATAL_ALERT_RECEIVED:
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{
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gnutls_alert_description_t alert = pgnutls_alert_get(s);
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const char *alert_name = pgnutls_alert_get_name(alert);
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WARN("ALERT: %d %s\n", alert, alert_name);
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return SEC_E_INTERNAL_ERROR;
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}
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default:
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pgnutls_perror(err);
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return SEC_E_INTERNAL_ERROR;
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}
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/* Never reached */
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return SEC_E_OK;
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}
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static unsigned int schannel_get_cipher_block_size(gnutls_cipher_algorithm_t cipher)
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{
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const struct
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{
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gnutls_cipher_algorithm_t cipher;
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unsigned int block_size;
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}
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algorithms[] =
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{
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{GNUTLS_CIPHER_3DES_CBC, 8},
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{GNUTLS_CIPHER_AES_128_CBC, 16},
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{GNUTLS_CIPHER_AES_256_CBC, 16},
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{GNUTLS_CIPHER_ARCFOUR_128, 1},
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{GNUTLS_CIPHER_ARCFOUR_40, 1},
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{GNUTLS_CIPHER_DES_CBC, 8},
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{GNUTLS_CIPHER_NULL, 1},
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{GNUTLS_CIPHER_RC2_40_CBC, 8},
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};
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unsigned int i;
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for (i = 0; i < sizeof(algorithms) / sizeof(*algorithms); ++i)
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{
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if (algorithms[i].cipher == cipher)
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return algorithms[i].block_size;
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}
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FIXME("Unknown cipher %#x, returning 1\n", cipher);
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return 1;
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}
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static DWORD schannel_get_protocol(gnutls_protocol_t proto)
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{
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/* FIXME: currently schannel only implements client connections, but
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* there's no reason it couldn't be used for servers as well. The
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* context doesn't tell us which it is, so assume client for now.
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*/
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switch (proto)
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{
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case GNUTLS_SSL3: return SP_PROT_SSL3_CLIENT;
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case GNUTLS_TLS1_0: return SP_PROT_TLS1_0_CLIENT;
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case GNUTLS_TLS1_1: return SP_PROT_TLS1_1_CLIENT;
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case GNUTLS_TLS1_2: return SP_PROT_TLS1_2_CLIENT;
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default:
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FIXME("unknown protocol %d\n", proto);
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return 0;
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}
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}
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static ALG_ID schannel_get_cipher_algid(gnutls_cipher_algorithm_t cipher)
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{
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switch (cipher)
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{
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case GNUTLS_CIPHER_UNKNOWN:
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case GNUTLS_CIPHER_NULL: return 0;
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case GNUTLS_CIPHER_ARCFOUR_40:
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case GNUTLS_CIPHER_ARCFOUR_128: return CALG_RC4;
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case GNUTLS_CIPHER_DES_CBC:
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case GNUTLS_CIPHER_3DES_CBC: return CALG_DES;
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case GNUTLS_CIPHER_AES_128_CBC:
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case GNUTLS_CIPHER_AES_256_CBC: return CALG_AES;
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case GNUTLS_CIPHER_RC2_40_CBC: return CALG_RC2;
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default:
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FIXME("unknown algorithm %d\n", cipher);
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return 0;
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}
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}
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static ALG_ID schannel_get_mac_algid(gnutls_mac_algorithm_t mac)
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{
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switch (mac)
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{
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case GNUTLS_MAC_UNKNOWN:
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case GNUTLS_MAC_NULL: return 0;
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case GNUTLS_MAC_MD5: return CALG_MD5;
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case GNUTLS_MAC_SHA1:
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case GNUTLS_MAC_SHA256:
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case GNUTLS_MAC_SHA384:
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case GNUTLS_MAC_SHA512: return CALG_SHA;
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default:
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FIXME("unknown algorithm %d\n", mac);
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return 0;
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}
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}
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static ALG_ID schannel_get_kx_algid(gnutls_kx_algorithm_t kx)
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{
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switch (kx)
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{
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case GNUTLS_KX_RSA: return CALG_RSA_KEYX;
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case GNUTLS_KX_DHE_DSS:
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case GNUTLS_KX_DHE_RSA: return CALG_DH_EPHEM;
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default:
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FIXME("unknown algorithm %d\n", kx);
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return 0;
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}
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}
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unsigned int schan_imp_get_session_cipher_block_size(schan_imp_session session)
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{
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gnutls_session_t s = (gnutls_session_t)session;
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gnutls_cipher_algorithm_t cipher = pgnutls_cipher_get(s);
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return schannel_get_cipher_block_size(cipher);
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}
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unsigned int schan_imp_get_max_message_size(schan_imp_session session)
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{
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return pgnutls_record_get_max_size((gnutls_session_t)session);
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}
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SECURITY_STATUS schan_imp_get_connection_info(schan_imp_session session,
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SecPkgContext_ConnectionInfo *info)
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{
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gnutls_session_t s = (gnutls_session_t)session;
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gnutls_protocol_t proto = pgnutls_protocol_get_version(s);
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gnutls_cipher_algorithm_t alg = pgnutls_cipher_get(s);
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gnutls_mac_algorithm_t mac = pgnutls_mac_get(s);
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gnutls_kx_algorithm_t kx = pgnutls_kx_get(s);
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info->dwProtocol = schannel_get_protocol(proto);
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info->aiCipher = schannel_get_cipher_algid(alg);
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info->dwCipherStrength = pgnutls_cipher_get_key_size(alg) * 8;
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info->aiHash = schannel_get_mac_algid(mac);
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info->dwHashStrength = pgnutls_mac_get_key_size(mac) * 8;
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info->aiExch = schannel_get_kx_algid(kx);
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/* FIXME: info->dwExchStrength? */
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info->dwExchStrength = 0;
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return SEC_E_OK;
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}
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SECURITY_STATUS schan_imp_get_session_peer_certificate(schan_imp_session session, HCERTSTORE store,
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PCCERT_CONTEXT *ret)
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{
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gnutls_session_t s = (gnutls_session_t)session;
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PCCERT_CONTEXT cert = NULL;
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const gnutls_datum_t *datum;
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unsigned list_size, i;
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BOOL res;
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datum = pgnutls_certificate_get_peers(s, &list_size);
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if(!datum)
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return SEC_E_INTERNAL_ERROR;
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for(i = 0; i < list_size; i++) {
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res = CertAddEncodedCertificateToStore(store, X509_ASN_ENCODING, datum[i].data, datum[i].size,
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CERT_STORE_ADD_REPLACE_EXISTING, i ? NULL : &cert);
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if(!res) {
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if(i)
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CertFreeCertificateContext(cert);
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return GetLastError();
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}
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}
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*ret = cert;
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return SEC_E_OK;
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}
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SECURITY_STATUS schan_imp_send(schan_imp_session session, const void *buffer,
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SIZE_T *length)
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{
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gnutls_session_t s = (gnutls_session_t)session;
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ssize_t ret;
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again:
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ret = pgnutls_record_send(s, buffer, *length);
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if (ret >= 0)
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*length = ret;
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else if (ret == GNUTLS_E_AGAIN)
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{
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struct schan_transport *t = (struct schan_transport *)pgnutls_transport_get_ptr(s);
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SIZE_T count = 0;
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if (schan_get_buffer(t, &t->out, &count))
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goto again;
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return SEC_I_CONTINUE_NEEDED;
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}
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else
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{
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pgnutls_perror(ret);
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return SEC_E_INTERNAL_ERROR;
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}
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return SEC_E_OK;
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}
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SECURITY_STATUS schan_imp_recv(schan_imp_session session, void *buffer,
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SIZE_T *length)
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{
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gnutls_session_t s = (gnutls_session_t)session;
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ssize_t ret;
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again:
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ret = pgnutls_record_recv(s, buffer, *length);
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if (ret >= 0)
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*length = ret;
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else if (ret == GNUTLS_E_AGAIN)
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{
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struct schan_transport *t = (struct schan_transport *)pgnutls_transport_get_ptr(s);
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SIZE_T count = 0;
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if (schan_get_buffer(t, &t->in, &count))
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goto again;
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return SEC_I_CONTINUE_NEEDED;
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}
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else
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{
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pgnutls_perror(ret);
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return SEC_E_INTERNAL_ERROR;
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}
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return SEC_E_OK;
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}
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BOOL schan_imp_allocate_certificate_credentials(schan_credentials *c)
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{
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int ret = pgnutls_certificate_allocate_credentials((gnutls_certificate_credentials_t*)&c->credentials);
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if (ret != GNUTLS_E_SUCCESS)
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pgnutls_perror(ret);
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return (ret == GNUTLS_E_SUCCESS);
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}
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void schan_imp_free_certificate_credentials(schan_credentials *c)
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{
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pgnutls_certificate_free_credentials(c->credentials);
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}
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static void schan_gnutls_log(int level, const char *msg)
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{
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TRACE("<%d> %s", level, msg);
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}
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BOOL schan_imp_init(void)
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{
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int ret;
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libgnutls_handle = wine_dlopen(SONAME_LIBGNUTLS, RTLD_NOW, NULL, 0);
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if (!libgnutls_handle)
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{
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WARN("Failed to load libgnutls.\n");
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return FALSE;
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}
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#define LOAD_FUNCPTR(f) \
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if (!(p##f = wine_dlsym(libgnutls_handle, #f, NULL, 0))) \
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{ \
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ERR("Failed to load %s\n", #f); \
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goto fail; \
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}
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LOAD_FUNCPTR(gnutls_alert_get)
|
|
LOAD_FUNCPTR(gnutls_alert_get_name)
|
|
LOAD_FUNCPTR(gnutls_certificate_allocate_credentials)
|
|
LOAD_FUNCPTR(gnutls_certificate_free_credentials)
|
|
LOAD_FUNCPTR(gnutls_certificate_get_peers)
|
|
LOAD_FUNCPTR(gnutls_cipher_get)
|
|
LOAD_FUNCPTR(gnutls_cipher_get_key_size)
|
|
LOAD_FUNCPTR(gnutls_credentials_set)
|
|
LOAD_FUNCPTR(gnutls_deinit)
|
|
LOAD_FUNCPTR(gnutls_global_deinit)
|
|
LOAD_FUNCPTR(gnutls_global_init)
|
|
LOAD_FUNCPTR(gnutls_global_set_log_function)
|
|
LOAD_FUNCPTR(gnutls_global_set_log_level)
|
|
LOAD_FUNCPTR(gnutls_handshake)
|
|
LOAD_FUNCPTR(gnutls_init)
|
|
LOAD_FUNCPTR(gnutls_kx_get)
|
|
LOAD_FUNCPTR(gnutls_mac_get)
|
|
LOAD_FUNCPTR(gnutls_mac_get_key_size)
|
|
LOAD_FUNCPTR(gnutls_perror)
|
|
LOAD_FUNCPTR(gnutls_protocol_get_version)
|
|
LOAD_FUNCPTR(gnutls_priority_set_direct)
|
|
LOAD_FUNCPTR(gnutls_record_get_max_size);
|
|
LOAD_FUNCPTR(gnutls_record_recv);
|
|
LOAD_FUNCPTR(gnutls_record_send);
|
|
LOAD_FUNCPTR(gnutls_server_name_set)
|
|
LOAD_FUNCPTR(gnutls_transport_get_ptr)
|
|
LOAD_FUNCPTR(gnutls_transport_set_errno)
|
|
LOAD_FUNCPTR(gnutls_transport_set_ptr)
|
|
LOAD_FUNCPTR(gnutls_transport_set_pull_function)
|
|
LOAD_FUNCPTR(gnutls_transport_set_push_function)
|
|
#undef LOAD_FUNCPTR
|
|
|
|
ret = pgnutls_global_init();
|
|
if (ret != GNUTLS_E_SUCCESS)
|
|
{
|
|
pgnutls_perror(ret);
|
|
goto fail;
|
|
}
|
|
|
|
if (TRACE_ON(secur32))
|
|
{
|
|
pgnutls_global_set_log_level(4);
|
|
pgnutls_global_set_log_function(schan_gnutls_log);
|
|
}
|
|
|
|
return TRUE;
|
|
|
|
fail:
|
|
wine_dlclose(libgnutls_handle, NULL, 0);
|
|
libgnutls_handle = NULL;
|
|
return FALSE;
|
|
}
|
|
|
|
void schan_imp_deinit(void)
|
|
{
|
|
pgnutls_global_deinit();
|
|
wine_dlclose(libgnutls_handle, NULL, 0);
|
|
libgnutls_handle = NULL;
|
|
}
|
|
|
|
#endif /* SONAME_LIBGNUTLS && !HAVE_SECURITY_SECURITY_H */
|