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Sweden-Number/dlls/secur32/schannel_gnutls.c

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/*
* GnuTLS-based implementation of the schannel (SSL/TLS) provider.
*
* Copyright 2005 Juan Lang
* Copyright 2008 Henri Verbeet
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include <stdarg.h>
#ifdef SONAME_LIBGNUTLS
#include <gnutls/gnutls.h>
#include <gnutls/crypto.h>
#endif
#include "windef.h"
#include "winbase.h"
#include "sspi.h"
#include "schannel.h"
#include "secur32_priv.h"
#include "wine/debug.h"
#include "wine/library.h"
#if defined(SONAME_LIBGNUTLS) && !defined(HAVE_SECURITY_SECURITY_H)
WINE_DEFAULT_DEBUG_CHANNEL(secur32);
WINE_DECLARE_DEBUG_CHANNEL(winediag);
/* Not present in gnutls version < 2.9.10. */
static int (*pgnutls_cipher_get_block_size)(gnutls_cipher_algorithm_t algorithm);
static void *libgnutls_handle;
#define MAKE_FUNCPTR(f) static typeof(f) * p##f
MAKE_FUNCPTR(gnutls_alert_get);
MAKE_FUNCPTR(gnutls_alert_get_name);
MAKE_FUNCPTR(gnutls_certificate_allocate_credentials);
MAKE_FUNCPTR(gnutls_certificate_free_credentials);
MAKE_FUNCPTR(gnutls_certificate_get_peers);
MAKE_FUNCPTR(gnutls_cipher_get);
MAKE_FUNCPTR(gnutls_cipher_get_key_size);
MAKE_FUNCPTR(gnutls_credentials_set);
MAKE_FUNCPTR(gnutls_deinit);
MAKE_FUNCPTR(gnutls_global_deinit);
MAKE_FUNCPTR(gnutls_global_init);
MAKE_FUNCPTR(gnutls_global_set_log_function);
MAKE_FUNCPTR(gnutls_global_set_log_level);
MAKE_FUNCPTR(gnutls_handshake);
MAKE_FUNCPTR(gnutls_init);
MAKE_FUNCPTR(gnutls_kx_get);
MAKE_FUNCPTR(gnutls_mac_get);
MAKE_FUNCPTR(gnutls_mac_get_key_size);
MAKE_FUNCPTR(gnutls_perror);
MAKE_FUNCPTR(gnutls_protocol_get_version);
MAKE_FUNCPTR(gnutls_priority_set_direct);
MAKE_FUNCPTR(gnutls_record_get_max_size);
MAKE_FUNCPTR(gnutls_record_recv);
MAKE_FUNCPTR(gnutls_record_send);
MAKE_FUNCPTR(gnutls_server_name_set);
MAKE_FUNCPTR(gnutls_transport_get_ptr);
MAKE_FUNCPTR(gnutls_transport_set_errno);
MAKE_FUNCPTR(gnutls_transport_set_ptr);
MAKE_FUNCPTR(gnutls_transport_set_pull_function);
MAKE_FUNCPTR(gnutls_transport_set_push_function);
#undef MAKE_FUNCPTR
#if GNUTLS_VERSION_MAJOR < 3
#define GNUTLS_CIPHER_AES_192_CBC 92
#define GNUTLS_CIPHER_AES_128_GCM 93
#define GNUTLS_CIPHER_AES_256_GCM 94
#define GNUTLS_KX_ANON_ECDH 11
#define GNUTLS_KX_ECDHE_RSA 12
#define GNUTLS_KX_ECDHE_ECDSA 13
#define GNUTLS_KX_ECDHE_PSK 14
#endif
static int compat_cipher_get_block_size(gnutls_cipher_algorithm_t cipher)
{
switch(cipher) {
case GNUTLS_CIPHER_3DES_CBC:
return 8;
case GNUTLS_CIPHER_AES_128_CBC:
case GNUTLS_CIPHER_AES_256_CBC:
return 16;
case GNUTLS_CIPHER_ARCFOUR_128:
case GNUTLS_CIPHER_ARCFOUR_40:
return 1;
case GNUTLS_CIPHER_DES_CBC:
return 8;
case GNUTLS_CIPHER_NULL:
return 1;
case GNUTLS_CIPHER_RC2_40_CBC:
return 8;
default:
FIXME("Unknown cipher %#x, returning 1\n", cipher);
return 1;
}
}
static ssize_t schan_pull_adapter(gnutls_transport_ptr_t transport,
void *buff, size_t buff_len)
{
struct schan_transport *t = (struct schan_transport*)transport;
gnutls_session_t s = (gnutls_session_t)schan_session_for_transport(t);
int ret = schan_pull(transport, buff, &buff_len);
if (ret)
{
pgnutls_transport_set_errno(s, ret);
return -1;
}
return buff_len;
}
static ssize_t schan_push_adapter(gnutls_transport_ptr_t transport,
const void *buff, size_t buff_len)
{
struct schan_transport *t = (struct schan_transport*)transport;
gnutls_session_t s = (gnutls_session_t)schan_session_for_transport(t);
int ret = schan_push(transport, buff, &buff_len);
if (ret)
{
pgnutls_transport_set_errno(s, ret);
return -1;
}
return buff_len;
}
static const struct {
DWORD enable_flag;
const char *gnutls_flag;
} protocol_priority_flags[] = {
{SP_PROT_TLS1_2_CLIENT, "VERS-TLS1.2"},
{SP_PROT_TLS1_1_CLIENT, "VERS-TLS1.1"},
{SP_PROT_TLS1_0_CLIENT, "VERS-TLS1.0"},
{SP_PROT_SSL3_CLIENT, "VERS-SSL3.0"}
/* {SP_PROT_SSL2_CLIENT} is not supported by GnuTLS */
};
DWORD schan_imp_enabled_protocols(void)
{
/* NOTE: No support for SSL 2.0 */
return SP_PROT_SSL3_CLIENT | SP_PROT_TLS1_0_CLIENT | SP_PROT_TLS1_1_CLIENT | SP_PROT_TLS1_2_CLIENT;
}
BOOL schan_imp_create_session(schan_imp_session *session, schan_credentials *cred)
{
gnutls_session_t *s = (gnutls_session_t*)session;
char priority[128] = "NORMAL:%LATEST_RECORD_VERSION", *p;
unsigned i;
int err = pgnutls_init(s, cred->credential_use == SECPKG_CRED_INBOUND ? GNUTLS_SERVER : GNUTLS_CLIENT);
if (err != GNUTLS_E_SUCCESS)
{
pgnutls_perror(err);
return FALSE;
}
p = priority + strlen(priority);
for(i=0; i < sizeof(protocol_priority_flags)/sizeof(*protocol_priority_flags); i++) {
*p++ = ':';
*p++ = (cred->enabled_protocols & protocol_priority_flags[i].enable_flag) ? '+' : '-';
strcpy(p, protocol_priority_flags[i].gnutls_flag);
p += strlen(p);
}
TRACE("Using %s priority\n", debugstr_a(priority));
err = pgnutls_priority_set_direct(*s, priority, NULL);
if (err != GNUTLS_E_SUCCESS)
{
pgnutls_perror(err);
pgnutls_deinit(*s);
return FALSE;
}
err = pgnutls_credentials_set(*s, GNUTLS_CRD_CERTIFICATE,
(gnutls_certificate_credentials_t)cred->credentials);
if (err != GNUTLS_E_SUCCESS)
{
pgnutls_perror(err);
pgnutls_deinit(*s);
return FALSE;
}
pgnutls_transport_set_pull_function(*s, schan_pull_adapter);
pgnutls_transport_set_push_function(*s, schan_push_adapter);
return TRUE;
}
void schan_imp_dispose_session(schan_imp_session session)
{
gnutls_session_t s = (gnutls_session_t)session;
pgnutls_deinit(s);
}
void schan_imp_set_session_transport(schan_imp_session session,
struct schan_transport *t)
{
gnutls_session_t s = (gnutls_session_t)session;
pgnutls_transport_set_ptr(s, (gnutls_transport_ptr_t)t);
}
void schan_imp_set_session_target(schan_imp_session session, const char *target)
{
gnutls_session_t s = (gnutls_session_t)session;
pgnutls_server_name_set( s, GNUTLS_NAME_DNS, target, strlen(target) );
}
SECURITY_STATUS schan_imp_handshake(schan_imp_session session)
{
gnutls_session_t s = (gnutls_session_t)session;
int err;
while(1) {
err = pgnutls_handshake(s);
switch(err) {
case GNUTLS_E_SUCCESS:
TRACE("Handshake completed\n");
return SEC_E_OK;
case GNUTLS_E_AGAIN:
TRACE("Continue...\n");
return SEC_I_CONTINUE_NEEDED;
case GNUTLS_E_WARNING_ALERT_RECEIVED:
{
gnutls_alert_description_t alert = pgnutls_alert_get(s);
WARN("WARNING ALERT: %d %s\n", alert, pgnutls_alert_get_name(alert));
switch(alert) {
case GNUTLS_A_UNRECOGNIZED_NAME:
TRACE("Ignoring\n");
continue;
default:
return SEC_E_INTERNAL_ERROR;
}
}
case GNUTLS_E_FATAL_ALERT_RECEIVED:
{
gnutls_alert_description_t alert = pgnutls_alert_get(s);
WARN("FATAL ALERT: %d %s\n", alert, pgnutls_alert_get_name(alert));
return SEC_E_INTERNAL_ERROR;
}
default:
pgnutls_perror(err);
return SEC_E_INTERNAL_ERROR;
}
}
/* Never reached */
return SEC_E_OK;
}
static DWORD schannel_get_protocol(gnutls_protocol_t proto)
{
/* FIXME: currently schannel only implements client connections, but
* there's no reason it couldn't be used for servers as well. The
* context doesn't tell us which it is, so assume client for now.
*/
switch (proto)
{
case GNUTLS_SSL3: return SP_PROT_SSL3_CLIENT;
case GNUTLS_TLS1_0: return SP_PROT_TLS1_0_CLIENT;
case GNUTLS_TLS1_1: return SP_PROT_TLS1_1_CLIENT;
case GNUTLS_TLS1_2: return SP_PROT_TLS1_2_CLIENT;
default:
FIXME("unknown protocol %d\n", proto);
return 0;
}
}
static ALG_ID schannel_get_cipher_algid(int cipher)
{
switch (cipher)
{
case GNUTLS_CIPHER_UNKNOWN:
case GNUTLS_CIPHER_NULL: return 0;
case GNUTLS_CIPHER_ARCFOUR_40:
case GNUTLS_CIPHER_ARCFOUR_128: return CALG_RC4;
case GNUTLS_CIPHER_DES_CBC:
case GNUTLS_CIPHER_3DES_CBC: return CALG_DES;
case GNUTLS_CIPHER_AES_128_CBC:
case GNUTLS_CIPHER_AES_128_GCM: return CALG_AES_128;
case GNUTLS_CIPHER_AES_192_CBC: return CALG_AES_192;
case GNUTLS_CIPHER_AES_256_GCM:
case GNUTLS_CIPHER_AES_256_CBC: return CALG_AES_256;
case GNUTLS_CIPHER_RC2_40_CBC: return CALG_RC2;
default:
FIXME("unknown algorithm %d\n", cipher);
return 0;
}
}
static ALG_ID schannel_get_mac_algid(gnutls_mac_algorithm_t mac)
{
switch (mac)
{
case GNUTLS_MAC_UNKNOWN:
case GNUTLS_MAC_NULL: return 0;
case GNUTLS_MAC_MD2: return CALG_MD2;
case GNUTLS_MAC_MD5: return CALG_MD5;
case GNUTLS_MAC_SHA1: return CALG_SHA1;
case GNUTLS_MAC_SHA256: return CALG_SHA_256;
case GNUTLS_MAC_SHA384: return CALG_SHA_384;
case GNUTLS_MAC_SHA512: return CALG_SHA_512;
default:
FIXME("unknown algorithm %d\n", mac);
return 0;
}
}
static ALG_ID schannel_get_kx_algid(int kx)
{
switch (kx)
{
case GNUTLS_KX_UNKNOWN: return 0;
case GNUTLS_KX_RSA:
case GNUTLS_KX_RSA_EXPORT: return CALG_RSA_KEYX;
case GNUTLS_KX_DHE_PSK:
case GNUTLS_KX_DHE_DSS:
case GNUTLS_KX_DHE_RSA: return CALG_DH_EPHEM;
case GNUTLS_KX_ANON_ECDH: return CALG_ECDH;
/* MSDN mentions CALG_ECDH_EPHEM, but doesn't appear in the Windows SDK. */
case GNUTLS_KX_ECDHE_RSA:
case GNUTLS_KX_ECDHE_PSK: return CALG_ECDH;
case GNUTLS_KX_ECDHE_ECDSA: return CALG_ECDSA;
default:
FIXME("unknown algorithm %d\n", kx);
return 0;
}
}
unsigned int schan_imp_get_session_cipher_block_size(schan_imp_session session)
{
gnutls_session_t s = (gnutls_session_t)session;
return pgnutls_cipher_get_block_size(pgnutls_cipher_get(s));
}
unsigned int schan_imp_get_max_message_size(schan_imp_session session)
{
return pgnutls_record_get_max_size((gnutls_session_t)session);
}
SECURITY_STATUS schan_imp_get_connection_info(schan_imp_session session,
SecPkgContext_ConnectionInfo *info)
{
gnutls_session_t s = (gnutls_session_t)session;
gnutls_protocol_t proto = pgnutls_protocol_get_version(s);
gnutls_cipher_algorithm_t alg = pgnutls_cipher_get(s);
gnutls_mac_algorithm_t mac = pgnutls_mac_get(s);
gnutls_kx_algorithm_t kx = pgnutls_kx_get(s);
info->dwProtocol = schannel_get_protocol(proto);
info->aiCipher = schannel_get_cipher_algid(alg);
info->dwCipherStrength = pgnutls_cipher_get_key_size(alg) * 8;
info->aiHash = schannel_get_mac_algid(mac);
info->dwHashStrength = pgnutls_mac_get_key_size(mac) * 8;
info->aiExch = schannel_get_kx_algid(kx);
/* FIXME: info->dwExchStrength? */
info->dwExchStrength = 0;
return SEC_E_OK;
}
SECURITY_STATUS schan_imp_get_session_peer_certificate(schan_imp_session session, HCERTSTORE store,
PCCERT_CONTEXT *ret)
{
gnutls_session_t s = (gnutls_session_t)session;
PCCERT_CONTEXT cert = NULL;
const gnutls_datum_t *datum;
unsigned list_size, i;
BOOL res;
datum = pgnutls_certificate_get_peers(s, &list_size);
if(!datum)
return SEC_E_INTERNAL_ERROR;
for(i = 0; i < list_size; i++) {
res = CertAddEncodedCertificateToStore(store, X509_ASN_ENCODING, datum[i].data, datum[i].size,
CERT_STORE_ADD_REPLACE_EXISTING, i ? NULL : &cert);
if(!res) {
if(i)
CertFreeCertificateContext(cert);
return GetLastError();
}
}
*ret = cert;
return SEC_E_OK;
}
SECURITY_STATUS schan_imp_send(schan_imp_session session, const void *buffer,
SIZE_T *length)
{
gnutls_session_t s = (gnutls_session_t)session;
SSIZE_T ret, total = 0;
for (;;)
{
ret = pgnutls_record_send(s, (const char *)buffer + total, *length - total);
if (ret >= 0)
{
total += ret;
TRACE( "sent %ld now %ld/%ld\n", ret, total, *length );
if (total == *length) return SEC_E_OK;
}
else if (ret == GNUTLS_E_AGAIN)
{
struct schan_transport *t = (struct schan_transport *)pgnutls_transport_get_ptr(s);
SIZE_T count = 0;
if (schan_get_buffer(t, &t->out, &count)) continue;
return SEC_I_CONTINUE_NEEDED;
}
else
{
pgnutls_perror(ret);
return SEC_E_INTERNAL_ERROR;
}
}
}
SECURITY_STATUS schan_imp_recv(schan_imp_session session, void *buffer,
SIZE_T *length)
{
gnutls_session_t s = (gnutls_session_t)session;
ssize_t ret;
again:
ret = pgnutls_record_recv(s, buffer, *length);
if (ret >= 0)
*length = ret;
else if (ret == GNUTLS_E_AGAIN)
{
struct schan_transport *t = (struct schan_transport *)pgnutls_transport_get_ptr(s);
SIZE_T count = 0;
if (schan_get_buffer(t, &t->in, &count))
goto again;
return SEC_I_CONTINUE_NEEDED;
}
else
{
pgnutls_perror(ret);
return SEC_E_INTERNAL_ERROR;
}
return SEC_E_OK;
}
BOOL schan_imp_allocate_certificate_credentials(schan_credentials *c)
{
int ret = pgnutls_certificate_allocate_credentials((gnutls_certificate_credentials_t*)&c->credentials);
if (ret != GNUTLS_E_SUCCESS)
pgnutls_perror(ret);
return (ret == GNUTLS_E_SUCCESS);
}
void schan_imp_free_certificate_credentials(schan_credentials *c)
{
pgnutls_certificate_free_credentials(c->credentials);
}
static void schan_gnutls_log(int level, const char *msg)
{
TRACE("<%d> %s", level, msg);
}
BOOL schan_imp_init(void)
{
int ret;
libgnutls_handle = wine_dlopen(SONAME_LIBGNUTLS, RTLD_NOW, NULL, 0);
if (!libgnutls_handle)
{
ERR_(winediag)("Failed to load libgnutls, secure connections will not be available.\n");
return FALSE;
}
#define LOAD_FUNCPTR(f) \
if (!(p##f = wine_dlsym(libgnutls_handle, #f, NULL, 0))) \
{ \
ERR("Failed to load %s\n", #f); \
goto fail; \
}
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
if (!(pgnutls_cipher_get_block_size = wine_dlsym(libgnutls_handle, "gnutls_cipher_get_block_size", NULL, 0)))
{
WARN("gnutls_cipher_get_block_size not found\n");
pgnutls_cipher_get_block_size = compat_cipher_get_block_size;
}
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 */
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