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wine/dlls/secur32/schannel_gnutls.c

496 lines
14 KiB
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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>
#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"
WINE_DEFAULT_DEBUG_CHANNEL(secur32);
#if defined(SONAME_LIBGNUTLS) && !defined(HAVE_SECURITY_SECURITY_H)
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_set_default_priority);
MAKE_FUNCPTR(gnutls_record_get_max_size);
MAKE_FUNCPTR(gnutls_record_recv);
MAKE_FUNCPTR(gnutls_record_send);
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
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;
}
BOOL schan_imp_create_session(schan_imp_session *session, BOOL is_server,
schan_imp_certificate_credentials cred)
{
gnutls_session_t *s = (gnutls_session_t*)session;
int err = pgnutls_init(s, is_server ? GNUTLS_SERVER : GNUTLS_CLIENT);
if (err != GNUTLS_E_SUCCESS)
{
pgnutls_perror(err);
return FALSE;
}
/* FIXME: We should be using the information from the credentials here. */
FIXME("Using hardcoded \"NORMAL\" priority\n");
err = pgnutls_set_default_priority(*s);
if (err != GNUTLS_E_SUCCESS)
{
pgnutls_perror(err);
pgnutls_deinit(*s);
return FALSE;
}
err = pgnutls_credentials_set(*s, GNUTLS_CRD_CERTIFICATE,
(gnutls_certificate_credentials)cred);
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);
}
SECURITY_STATUS schan_imp_handshake(schan_imp_session session)
{
gnutls_session_t s = (gnutls_session_t)session;
int 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:
case GNUTLS_E_FATAL_ALERT_RECEIVED:
{
gnutls_alert_description_t alert = pgnutls_alert_get(s);
const char *alert_name = pgnutls_alert_get_name(alert);
WARN("ALERT: %d %s\n", alert, alert_name);
return SEC_E_INTERNAL_ERROR;
}
default:
pgnutls_perror(err);
return SEC_E_INTERNAL_ERROR;
}
/* Never reached */
return SEC_E_OK;
}
static unsigned int schannel_get_cipher_block_size(gnutls_cipher_algorithm_t cipher)
{
const struct
{
gnutls_cipher_algorithm_t cipher;
unsigned int block_size;
}
algorithms[] =
{
{GNUTLS_CIPHER_3DES_CBC, 8},
{GNUTLS_CIPHER_AES_128_CBC, 16},
{GNUTLS_CIPHER_AES_256_CBC, 16},
{GNUTLS_CIPHER_ARCFOUR_128, 1},
{GNUTLS_CIPHER_ARCFOUR_40, 1},
{GNUTLS_CIPHER_DES_CBC, 8},
{GNUTLS_CIPHER_NULL, 1},
{GNUTLS_CIPHER_RC2_40_CBC, 8},
};
unsigned int i;
for (i = 0; i < sizeof(algorithms) / sizeof(*algorithms); ++i)
{
if (algorithms[i].cipher == cipher)
return algorithms[i].block_size;
}
FIXME("Unknown cipher %#x, returning 1\n", cipher);
return 1;
}
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_CLIENT;
default:
FIXME("unknown protocol %d\n", proto);
return 0;
}
}
static ALG_ID schannel_get_cipher_algid(gnutls_cipher_algorithm_t 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_256_CBC: return CALG_AES;
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_MD5: return CALG_MD5;
case GNUTLS_MAC_SHA1:
case GNUTLS_MAC_SHA256:
case GNUTLS_MAC_SHA384:
case GNUTLS_MAC_SHA512: return CALG_SHA;
default:
FIXME("unknown algorithm %d\n", mac);
return 0;
}
}
static ALG_ID schannel_get_kx_algid(gnutls_kx_algorithm_t kx)
{
switch (kx)
{
case GNUTLS_KX_RSA: return CALG_RSA_KEYX;
case GNUTLS_KX_DHE_DSS:
case GNUTLS_KX_DHE_RSA: return CALG_DH_EPHEM;
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;
gnutls_cipher_algorithm_t cipher = pgnutls_cipher_get(s);
return schannel_get_cipher_block_size(cipher);
}
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);
info->aiHash = schannel_get_mac_algid(mac);
info->dwHashStrength = pgnutls_mac_get_key_size(mac);
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,
PCCERT_CONTEXT *cert)
{
gnutls_session_t s = (gnutls_session_t)session;
unsigned int list_size;
const gnutls_datum_t *datum;
datum = pgnutls_certificate_get_peers(s, &list_size);
if (datum)
{
*cert = CertCreateCertificateContext(X509_ASN_ENCODING, datum->data,
datum->size);
if (!*cert)
return GetLastError();
else
return SEC_E_OK;
}
else
return SEC_E_INTERNAL_ERROR;
}
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;
again:
ret = pgnutls_record_send(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->out, &count))
goto again;
return SEC_I_CONTINUE_NEEDED;
}
else
{
pgnutls_perror(ret);
return SEC_E_INTERNAL_ERROR;
}
return SEC_E_OK;
}
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_imp_certificate_credentials *c)
{
int ret = pgnutls_certificate_allocate_credentials((gnutls_certificate_credentials*)c);
if (ret != GNUTLS_E_SUCCESS)
pgnutls_perror(ret);
return (ret == GNUTLS_E_SUCCESS);
}
void schan_imp_free_certificate_credentials(schan_imp_certificate_credentials c)
{
pgnutls_certificate_free_credentials((gnutls_certificate_credentials)c);
}
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)
{
WARN("Failed to load libgnutls.\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_set_default_priority)
LOAD_FUNCPTR(gnutls_record_get_max_size);
LOAD_FUNCPTR(gnutls_record_recv);
LOAD_FUNCPTR(gnutls_record_send);
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 */
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