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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>
#include <stdio.h>
#include <assert.h>
#ifdef SONAME_LIBGNUTLS
#include <gnutls/gnutls.h>
#include <gnutls/crypto.h>
#include <gnutls/abstract.h>
#endif
#include "windef.h"
#include "winbase.h"
#include "sspi.h"
#include "schannel.h"
#include "lmcons.h"
#include "winreg.h"
#include "secur32_priv.h"
#include "wine/debug.h"
#include "wine/unicode.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);
/* Not present in gnutls version < 3.0. */
static void (*pgnutls_transport_set_pull_timeout_function)(gnutls_session_t,
int (*)(gnutls_transport_ptr_t, unsigned int));
static void (*pgnutls_dtls_set_mtu)(gnutls_session_t, unsigned int);
/* Not present in gnutls version < 3.2.0. */
static int (*pgnutls_alpn_get_selected_protocol)(gnutls_session_t, gnutls_datum_t *);
static int (*pgnutls_alpn_set_protocols)(gnutls_session_t, const gnutls_datum_t *,
unsigned, unsigned int);
/* Not present in gnutls version < 3.3.0. */
static int (*pgnutls_privkey_import_rsa_raw)(gnutls_privkey_t, const gnutls_datum_t *,
const gnutls_datum_t *, const gnutls_datum_t *,
const gnutls_datum_t *, const gnutls_datum_t *,
const gnutls_datum_t *, const gnutls_datum_t *,
const gnutls_datum_t *);
/* Not present in gnutls version < 3.4.0. */
static int (*pgnutls_privkey_export_x509)(gnutls_privkey_t, gnutls_x509_privkey_t *);
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_certificate_set_x509_key);
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_privkey_deinit);
MAKE_FUNCPTR(gnutls_privkey_init);
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_session_channel_binding);
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);
MAKE_FUNCPTR(gnutls_x509_crt_deinit);
MAKE_FUNCPTR(gnutls_x509_crt_import);
MAKE_FUNCPTR(gnutls_x509_crt_init);
MAKE_FUNCPTR(gnutls_x509_privkey_deinit);
#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_MAC_AEAD 200
#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
#if GNUTLS_VERSION_MAJOR < 3 || (GNUTLS_VERSION_MAJOR == 3 && GNUTLS_VERSION_MINOR < 5)
#define GNUTLS_ALPN_SERVER_PRECEDENCE (1<<1)
#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 void compat_gnutls_transport_set_pull_timeout_function(gnutls_session_t session,
int (*func)(gnutls_transport_ptr_t, unsigned int))
{
FIXME("\n");
}
static int compat_gnutls_privkey_export_x509(gnutls_privkey_t privkey, gnutls_x509_privkey_t *key)
{
FIXME("\n");
return GNUTLS_E_UNKNOWN_PK_ALGORITHM;
}
static int compat_gnutls_privkey_import_rsa_raw(gnutls_privkey_t key, const gnutls_datum_t *p1,
const gnutls_datum_t *p2, const gnutls_datum_t *p3,
const gnutls_datum_t *p4, const gnutls_datum_t *p5,
const gnutls_datum_t *p6, const gnutls_datum_t *p7,
const gnutls_datum_t *p8)
{
FIXME("\n");
return GNUTLS_E_UNKNOWN_PK_ALGORITHM;
}
static int compat_gnutls_alpn_get_selected_protocol(gnutls_session_t session, gnutls_datum_t *protocol)
{
FIXME("\n");
return GNUTLS_E_INVALID_REQUEST;
}
static int compat_gnutls_alpn_set_protocols(gnutls_session_t session, const gnutls_datum_t *protocols,
unsigned size, unsigned int flags)
{
FIXME("\n");
return GNUTLS_E_INVALID_REQUEST;
}
static void compat_gnutls_dtls_set_mtu(gnutls_session_t session, unsigned int mtu)
{
FIXME("\n");
}
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_DTLS1_2_CLIENT, "VERS-DTLS1.2"},
{SP_PROT_DTLS1_0_CLIENT, "VERS-DTLS1.0"},
{SP_PROT_TLS1_3_CLIENT, "VERS-TLS1.3"},
{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 */
};
static DWORD supported_protocols;
static void check_supported_protocols(void)
{
gnutls_session_t session;
char priority[64];
unsigned i;
int err;
err = pgnutls_init(&session, GNUTLS_CLIENT);
if (err != GNUTLS_E_SUCCESS)
{
pgnutls_perror(err);
return;
}
for(i = 0; i < ARRAY_SIZE(protocol_priority_flags); i++)
{
sprintf(priority, "NORMAL:-%s", protocol_priority_flags[i].gnutls_flag);
err = pgnutls_priority_set_direct(session, priority, NULL);
if (err == GNUTLS_E_SUCCESS)
{
TRACE("%s is supported\n", protocol_priority_flags[i].gnutls_flag);
supported_protocols |= protocol_priority_flags[i].enable_flag;
}
else
TRACE("%s is not supported\n", protocol_priority_flags[i].gnutls_flag);
}
pgnutls_deinit(session);
}
DWORD schan_imp_enabled_protocols(void)
{
return supported_protocols;
}
static int schan_pull_timeout(gnutls_transport_ptr_t transport, unsigned int timeout)
{
struct schan_transport *t = (struct schan_transport *)transport;
SIZE_T count = 0;
if (schan_get_buffer(t, &t->in, &count)) return 1;
return 0;
}
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;
BOOL using_vers_all = FALSE, disabled;
unsigned int i, flags = (cred->credential_use == SECPKG_CRED_INBOUND) ? GNUTLS_SERVER : GNUTLS_CLIENT;
int err;
if (cred->enabled_protocols & (SP_PROT_DTLS1_0_CLIENT | SP_PROT_DTLS1_2_CLIENT))
{
flags |= GNUTLS_DATAGRAM | GNUTLS_NONBLOCK;
}
err = pgnutls_init(s, flags);
if (err != GNUTLS_E_SUCCESS)
{
pgnutls_perror(err);
return FALSE;
}
p = priority + strlen(priority);
/* VERS-ALL is nice to use for forward compatibility. It was introduced before support for TLS1.3,
* so if TLS1.3 is supported, we may safely use it. Otherwise explicitly disable all known
* disabled protocols. */
if (supported_protocols & SP_PROT_TLS1_3_CLIENT)
{
strcpy(p, ":-VERS-ALL");
p += strlen(p);
using_vers_all = TRUE;
}
for (i = 0; i < ARRAY_SIZE(protocol_priority_flags); i++)
{
if (!(supported_protocols & protocol_priority_flags[i].enable_flag)) continue;
disabled = !(cred->enabled_protocols & protocol_priority_flags[i].enable_flag);
if (using_vers_all && disabled) continue;
*p++ = ':';
*p++ = disabled ? '-' : '+';
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);
if (flags & GNUTLS_DATAGRAM) pgnutls_transport_set_pull_timeout_function(*s, schan_pull_timeout);
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;
case GNUTLS_DTLS1_0: return SP_PROT_DTLS1_0_CLIENT;
case GNUTLS_DTLS1_2: return SP_PROT_DTLS1_2_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: return CALG_DES;
case GNUTLS_CIPHER_3DES_CBC: return CALG_3DES;
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, gnutls_cipher_algorithm_t cipher)
{
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;
case GNUTLS_MAC_AEAD:
/* When using AEAD (such as GCM), we return PRF algorithm instead
which is defined in RFC 5289. */
switch (cipher)
{
case GNUTLS_CIPHER_AES_128_GCM: return CALG_SHA_256;
case GNUTLS_CIPHER_AES_256_GCM: return CALG_SHA_384;
default:
break;
}
/* fall through */
default:
FIXME("unknown algorithm %d, cipher %d\n", mac, cipher);
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;
case GNUTLS_KX_ECDHE_RSA:
case GNUTLS_KX_ECDHE_PSK:
case GNUTLS_KX_ECDHE_ECDSA: return CALG_ECDH_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;
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, alg);
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_unique_channel_binding(schan_imp_session session,
SecPkgContext_Bindings *bindings)
{
static const char prefix[] = "tls-unique:";
gnutls_datum_t datum;
int rc;
SECURITY_STATUS ret;
char *p;
gnutls_session_t s = (gnutls_session_t)session;
rc = pgnutls_session_channel_binding(s, GNUTLS_CB_TLS_UNIQUE, &datum);
if (rc)
{
pgnutls_perror(rc);
return SEC_E_INTERNAL_ERROR;
}
bindings->BindingsLength = sizeof(SEC_CHANNEL_BINDINGS) + sizeof(prefix)-1 + datum.size;
bindings->Bindings = heap_alloc_zero(bindings->BindingsLength);
if (!bindings->Bindings)
ret = SEC_E_INSUFFICIENT_MEMORY;
else
{
bindings->Bindings->cbApplicationDataLength = sizeof(prefix)-1 + datum.size;
bindings->Bindings->dwApplicationDataOffset = sizeof(SEC_CHANNEL_BINDINGS);
p = (char*)(bindings->Bindings+1);
memcpy(p, prefix, sizeof(prefix)-1);
p += sizeof(prefix)-1;
memcpy(p, datum.data, datum.size);
ret = SEC_E_OK;
}
free(datum.data);
return ret;
}
ALG_ID schan_imp_get_key_signature_algorithm(schan_imp_session session)
{
gnutls_session_t s = (gnutls_session_t)session;
gnutls_kx_algorithm_t kx = pgnutls_kx_get(s);
TRACE("(%p)\n", session);
switch (kx)
{
case GNUTLS_KX_UNKNOWN: return 0;
case GNUTLS_KX_RSA:
case GNUTLS_KX_RSA_EXPORT:
case GNUTLS_KX_DHE_RSA:
case GNUTLS_KX_ECDHE_RSA: return CALG_RSA_SIGN;
case GNUTLS_KX_ECDHE_ECDSA: return CALG_ECDSA;
default:
FIXME("unknown algorithm %d\n", kx);
return 0;
}
}
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 if (ret == GNUTLS_E_REHANDSHAKE)
{
TRACE("Rehandshake requested\n");
return SEC_I_RENEGOTIATE;
}
else
{
pgnutls_perror(ret);
return SEC_E_INTERNAL_ERROR;
}
return SEC_E_OK;
}
static unsigned int parse_alpn_protocol_list(unsigned char *buffer, unsigned int buflen, gnutls_datum_t *list)
{
unsigned int len, offset = 0, count = 0;
while (buflen)
{
len = buffer[offset++];
buflen--;
if (!len || len > buflen) return 0;
if (list)
{
list[count].data = &buffer[offset];
list[count].size = len;
}
buflen -= len;
offset += len;
count++;
}
return count;
}
void schan_imp_set_application_protocols(schan_imp_session session, unsigned char *buffer, unsigned int buflen)
{
gnutls_session_t s = (gnutls_session_t)session;
unsigned int extension_len, extension, count = 0, offset = 0;
unsigned short list_len;
gnutls_datum_t *protocols;
int ret;
if (sizeof(extension_len) > buflen) return;
extension_len = *(unsigned int *)&buffer[offset];
offset += sizeof(extension_len);
if (offset + sizeof(extension) > buflen) return;
extension = *(unsigned int *)&buffer[offset];
if (extension != SecApplicationProtocolNegotiationExt_ALPN)
{
FIXME("extension %u not supported\n", extension);
return;
}
offset += sizeof(extension);
if (offset + sizeof(list_len) > buflen) return;
list_len = *(unsigned short *)&buffer[offset];
offset += sizeof(list_len);
if (offset + list_len > buflen) return;
count = parse_alpn_protocol_list(&buffer[offset], list_len, NULL);
if (!count || !(protocols = heap_alloc(count * sizeof(*protocols)))) return;
parse_alpn_protocol_list(&buffer[offset], list_len, protocols);
if ((ret = pgnutls_alpn_set_protocols(s, protocols, count, GNUTLS_ALPN_SERVER_PRECEDENCE) < 0))
{
pgnutls_perror(ret);
}
heap_free(protocols);
}
SECURITY_STATUS schan_imp_get_application_protocol(schan_imp_session session,
SecPkgContext_ApplicationProtocol *protocol)
{
gnutls_session_t s = (gnutls_session_t)session;
gnutls_datum_t selected;
memset(protocol, 0, sizeof(*protocol));
if (pgnutls_alpn_get_selected_protocol(s, &selected) < 0) return SEC_E_OK;
if (selected.size <= sizeof(protocol->ProtocolId))
{
protocol->ProtoNegoStatus = SecApplicationProtocolNegotiationStatus_Success;
protocol->ProtoNegoExt = SecApplicationProtocolNegotiationExt_ALPN;
protocol->ProtocolIdSize = selected.size;
memcpy(protocol->ProtocolId, selected.data, selected.size);
TRACE("returning %s\n", debugstr_an((const char *)selected.data, selected.size));
}
return SEC_E_OK;
}
SECURITY_STATUS schan_imp_set_dtls_mtu(schan_imp_session session, unsigned int mtu)
{
gnutls_session_t s = (gnutls_session_t)session;
pgnutls_dtls_set_mtu(s, mtu);
TRACE("MTU set to %u\n", mtu);
return SEC_E_OK;
}
static WCHAR *get_key_container_path(const CERT_CONTEXT *ctx)
{
static const WCHAR rsabaseW[] =
{'S','o','f','t','w','a','r','e','\\','W','i','n','e','\\','C','r','y','p','t','o','\\','R','S','A','\\',0};
CERT_KEY_CONTEXT keyctx;
DWORD size = sizeof(keyctx), prov_size = 0;
CRYPT_KEY_PROV_INFO *prov;
WCHAR username[UNLEN + 1], *ret = NULL;
DWORD len = ARRAY_SIZE(username);
if (CertGetCertificateContextProperty(ctx, CERT_KEY_CONTEXT_PROP_ID, &keyctx, &size))
{
char *str;
if (!CryptGetProvParam(keyctx.hCryptProv, PP_CONTAINER, NULL, &size, 0)) return NULL;
if (!(str = heap_alloc(size))) return NULL;
if (!CryptGetProvParam(keyctx.hCryptProv, PP_CONTAINER, (BYTE *)str, &size, 0)) return NULL;
len = MultiByteToWideChar(CP_ACP, 0, str, -1, NULL, 0);
if (!(ret = heap_alloc(sizeof(rsabaseW) + len * sizeof(WCHAR))))
{
heap_free(str);
return NULL;
}
strcpyW(ret, rsabaseW);
MultiByteToWideChar(CP_ACP, 0, str, -1, ret + strlenW(ret), len);
heap_free(str);
}
else if (CertGetCertificateContextProperty(ctx, CERT_KEY_PROV_INFO_PROP_ID, NULL, &prov_size))
{
if (!(prov = heap_alloc(prov_size))) return NULL;
if (!CertGetCertificateContextProperty(ctx, CERT_KEY_PROV_INFO_PROP_ID, prov, &prov_size))
{
heap_free(prov);
return NULL;
}
if (!(ret = heap_alloc(sizeof(rsabaseW) + strlenW(prov->pwszContainerName) * sizeof(WCHAR))))
{
heap_free(prov);
return NULL;
}
strcpyW(ret, rsabaseW);
strcatW(ret, prov->pwszContainerName);
heap_free(prov);
}
if (!ret && GetUserNameW(username, &len) && (ret = heap_alloc(sizeof(rsabaseW) + len * sizeof(WCHAR))))
{
strcpyW(ret, rsabaseW);
strcatW(ret, username);
}
return ret;
}
#define MAX_LEAD_BYTES 8
static BYTE *get_key_blob(const CERT_CONTEXT *ctx, ULONG *size)
{
static const WCHAR keyexchangeW[] =
{'K','e','y','E','x','c','h','a','n','g','e','K','e','y','P','a','i','r',0};
static const WCHAR signatureW[] =
{'S','i','g','n','a','t','u','r','e','K','e','y','P','a','i','r',0};
BYTE *buf, *ret = NULL;
DATA_BLOB blob_in, blob_out;
DWORD spec = 0, type, len;
WCHAR *path;
HKEY hkey;
if (!(path = get_key_container_path(ctx))) return NULL;
if (RegOpenKeyExW(HKEY_CURRENT_USER, path, 0, KEY_READ, &hkey))
{
heap_free(path);
return NULL;
}
heap_free(path);
if (!RegQueryValueExW(hkey, keyexchangeW, 0, &type, NULL, &len)) spec = AT_KEYEXCHANGE;
else if (!RegQueryValueExW(hkey, signatureW, 0, &type, NULL, &len)) spec = AT_SIGNATURE;
else
{
RegCloseKey(hkey);
return NULL;
}
if (!(buf = heap_alloc(len + MAX_LEAD_BYTES)))
{
RegCloseKey(hkey);
return NULL;
}
if (!RegQueryValueExW(hkey, (spec == AT_KEYEXCHANGE) ? keyexchangeW : signatureW, 0, &type, buf, &len))
{
blob_in.pbData = buf;
blob_in.cbData = len;
if (CryptUnprotectData(&blob_in, NULL, NULL, NULL, NULL, 0, &blob_out))
{
assert(blob_in.cbData >= blob_out.cbData);
memcpy(buf, blob_out.pbData, blob_out.cbData);
LocalFree(blob_out.pbData);
*size = blob_out.cbData + MAX_LEAD_BYTES;
ret = buf;
}
}
else heap_free(buf);
RegCloseKey(hkey);
return ret;
}
static inline void reverse_bytes(BYTE *buf, ULONG len)
{
BYTE tmp;
ULONG i;
for (i = 0; i < len / 2; i++)
{
tmp = buf[i];
buf[i] = buf[len - i - 1];
buf[len - i - 1] = tmp;
}
}
static ULONG set_component(gnutls_datum_t *comp, BYTE *data, ULONG len, ULONG *buflen)
{
comp->data = data;
comp->size = len;
reverse_bytes(comp->data, comp->size);
if (comp->data[0] & 0x80) /* add leading 0 byte if most significant bit is set */
{
memmove(comp->data + 1, comp->data, *buflen);
comp->data[0] = 0;
comp->size++;
}
*buflen -= comp->size;
return comp->size;
}
static gnutls_x509_privkey_t get_x509_key(const CERT_CONTEXT *ctx)
{
gnutls_privkey_t key = NULL;
gnutls_x509_privkey_t x509key = NULL;
gnutls_datum_t m, e, d, p, q, u, e1, e2;
BYTE *ptr, *buffer;
RSAPUBKEY *rsakey;
DWORD size;
int ret;
if (!(buffer = get_key_blob(ctx, &size))) return NULL;
if (size < sizeof(BLOBHEADER)) goto done;
rsakey = (RSAPUBKEY *)(buffer + sizeof(BLOBHEADER));
TRACE("RSA key bitlen %u pubexp %u\n", rsakey->bitlen, rsakey->pubexp);
size -= sizeof(BLOBHEADER) + FIELD_OFFSET(RSAPUBKEY, pubexp);
set_component(&e, (BYTE *)&rsakey->pubexp, sizeof(rsakey->pubexp), &size);
ptr = (BYTE *)(rsakey + 1);
ptr += set_component(&m, ptr, rsakey->bitlen / 8, &size);
ptr += set_component(&p, ptr, rsakey->bitlen / 16, &size);
ptr += set_component(&q, ptr, rsakey->bitlen / 16, &size);
ptr += set_component(&e1, ptr, rsakey->bitlen / 16, &size);
ptr += set_component(&e2, ptr, rsakey->bitlen / 16, &size);
ptr += set_component(&u, ptr, rsakey->bitlen / 16, &size);
ptr += set_component(&d, ptr, rsakey->bitlen / 8, &size);
if ((ret = pgnutls_privkey_init(&key)) < 0)
{
pgnutls_perror(ret);
goto done;
}
if ((ret = pgnutls_privkey_import_rsa_raw(key, &m, &e, &d, &p, &q, &u, &e1, &e2)) < 0)
{
pgnutls_perror(ret);
goto done;
}
if ((ret = pgnutls_privkey_export_x509(key, &x509key)) < 0)
{
pgnutls_perror(ret);
}
done:
heap_free(buffer);
pgnutls_privkey_deinit(key);
return x509key;
}
static gnutls_x509_crt_t get_x509_crt(const CERT_CONTEXT *ctx)
{
gnutls_datum_t data;
gnutls_x509_crt_t crt;
int ret;
if (!ctx) return FALSE;
if (ctx->dwCertEncodingType != X509_ASN_ENCODING)
{
FIXME("encoding type %u not supported\n", ctx->dwCertEncodingType);
return NULL;
}
if ((ret = pgnutls_x509_crt_init(&crt)) < 0)
{
pgnutls_perror(ret);
return NULL;
}
data.data = ctx->pbCertEncoded;
data.size = ctx->cbCertEncoded;
if ((ret = pgnutls_x509_crt_import(crt, &data, GNUTLS_X509_FMT_DER)) < 0)
{
pgnutls_perror(ret);
pgnutls_x509_crt_deinit(crt);
return NULL;
}
return crt;
}
BOOL schan_imp_allocate_certificate_credentials(schan_credentials *c, const CERT_CONTEXT *ctx)
{
gnutls_certificate_credentials_t creds;
gnutls_x509_crt_t crt;
gnutls_x509_privkey_t key;
int ret;
ret = pgnutls_certificate_allocate_credentials(&creds);
if (ret != GNUTLS_E_SUCCESS)
{
pgnutls_perror(ret);
return FALSE;
}
if (!ctx)
{
c->credentials = creds;
return TRUE;
}
if (!(crt = get_x509_crt(ctx)))
{
pgnutls_certificate_free_credentials(creds);
return FALSE;
}
if (!(key = get_x509_key(ctx)))
{
pgnutls_x509_crt_deinit(crt);
pgnutls_certificate_free_credentials(creds);
return FALSE;
}
ret = pgnutls_certificate_set_x509_key(creds, &crt, 1, key);
pgnutls_x509_privkey_deinit(key);
pgnutls_x509_crt_deinit(crt);
if (ret != GNUTLS_E_SUCCESS)
{
pgnutls_perror(ret);
pgnutls_certificate_free_credentials(creds);
return FALSE;
}
c->credentials = creds;
return TRUE;
}
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)
{
const char *env_str;
int ret;
if ((env_str = getenv("GNUTLS_SYSTEM_PRIORITY_FILE")))
{
WARN("GNUTLS_SYSTEM_PRIORITY_FILE is %s.\n", debugstr_a(env_str));
}
else
{
WARN("Setting GNUTLS_SYSTEM_PRIORITY_FILE to \"/dev/null\".\n");
setenv("GNUTLS_SYSTEM_PRIORITY_FILE", "/dev/null", 0);
}
libgnutls_handle = dlopen(SONAME_LIBGNUTLS, RTLD_NOW);
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 = dlsym(libgnutls_handle, #f))) \
{ \
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_certificate_set_x509_key)
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_privkey_deinit)
LOAD_FUNCPTR(gnutls_privkey_init)
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_session_channel_binding)
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)
LOAD_FUNCPTR(gnutls_x509_crt_deinit)
LOAD_FUNCPTR(gnutls_x509_crt_import)
LOAD_FUNCPTR(gnutls_x509_crt_init)
LOAD_FUNCPTR(gnutls_x509_privkey_deinit)
#undef LOAD_FUNCPTR
if (!(pgnutls_cipher_get_block_size = dlsym(libgnutls_handle, "gnutls_cipher_get_block_size")))
{
WARN("gnutls_cipher_get_block_size not found\n");
pgnutls_cipher_get_block_size = compat_cipher_get_block_size;
}
if (!(pgnutls_transport_set_pull_timeout_function = dlsym(libgnutls_handle, "gnutls_transport_set_pull_timeout_function")))
{
WARN("gnutls_transport_set_pull_timeout_function not found\n");
pgnutls_transport_set_pull_timeout_function = compat_gnutls_transport_set_pull_timeout_function;
}
if (!(pgnutls_alpn_set_protocols = dlsym(libgnutls_handle, "gnutls_alpn_set_protocols")))
{
WARN("gnutls_alpn_set_protocols not found\n");
pgnutls_alpn_set_protocols = compat_gnutls_alpn_set_protocols;
}
if (!(pgnutls_alpn_get_selected_protocol = dlsym(libgnutls_handle, "gnutls_alpn_get_selected_protocol")))
{
WARN("gnutls_alpn_get_selected_protocol not found\n");
pgnutls_alpn_get_selected_protocol = compat_gnutls_alpn_get_selected_protocol;
}
if (!(pgnutls_dtls_set_mtu = dlsym(libgnutls_handle, "gnutls_dtls_set_mtu")))
{
WARN("gnutls_dtls_set_mtu not found\n");
pgnutls_dtls_set_mtu = compat_gnutls_dtls_set_mtu;
}
if (!(pgnutls_privkey_export_x509 = dlsym(libgnutls_handle, "gnutls_privkey_export_x509")))
{
WARN("gnutls_privkey_export_x509 not found\n");
pgnutls_privkey_export_x509 = compat_gnutls_privkey_export_x509;
}
if (!(pgnutls_privkey_import_rsa_raw = dlsym(libgnutls_handle, "gnutls_privkey_import_rsa_raw")))
{
WARN("gnutls_privkey_import_rsa_raw not found\n");
pgnutls_privkey_import_rsa_raw = compat_gnutls_privkey_import_rsa_raw;
}
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);
}
check_supported_protocols();
return TRUE;
fail:
dlclose(libgnutls_handle);
libgnutls_handle = NULL;
return FALSE;
}
void schan_imp_deinit(void)
{
pgnutls_global_deinit();
dlclose(libgnutls_handle);
libgnutls_handle = NULL;
}
#endif /* SONAME_LIBGNUTLS && !HAVE_SECURITY_SECURITY_H */
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