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Sweden-Number/dlls/secur32/schannel.c

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/* Copyright (C) 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
*
* This file implements the schannel provider, or, the SSL/TLS implementations.
*/
#include <assert.h>
#include <stdarg.h>
#include <stdlib.h>
#include <errno.h>
#define NONAMELESSUNION
#include "windef.h"
#include "winbase.h"
#include "winternl.h"
#include "winreg.h"
#include "winnls.h"
#include "lmcons.h"
#include "sspi.h"
#include "schannel.h"
#include "wine/debug.h"
#include "secur32_priv.h"
WINE_DEFAULT_DEBUG_CHANNEL(secur32);
const struct schan_funcs *schan_funcs = NULL;
#define SCHAN_INVALID_HANDLE ~0UL
enum schan_handle_type
{
SCHAN_HANDLE_CRED,
SCHAN_HANDLE_CTX,
SCHAN_HANDLE_FREE
};
struct schan_handle
{
void *object;
enum schan_handle_type type;
};
struct schan_context
{
schan_session session;
struct schan_transport transport;
ULONG req_ctx_attr;
const CERT_CONTEXT *cert;
SIZE_T header_size;
};
static struct schan_handle *schan_handle_table;
static struct schan_handle *schan_free_handles;
static SIZE_T schan_handle_table_size;
static SIZE_T schan_handle_count;
/* Protocols enabled, only those may be used for the connection. */
static DWORD config_enabled_protocols;
/* Protocols disabled by default. They are enabled for using, but disabled when caller asks for default settings. */
static DWORD config_default_disabled_protocols;
static ULONG_PTR schan_alloc_handle(void *object, enum schan_handle_type type)
{
struct schan_handle *handle;
if (schan_free_handles)
{
DWORD index = schan_free_handles - schan_handle_table;
/* Use a free handle */
handle = schan_free_handles;
if (handle->type != SCHAN_HANDLE_FREE)
{
ERR("Handle %d(%p) is in the free list, but has type %#x.\n", index, handle, handle->type);
return SCHAN_INVALID_HANDLE;
}
schan_free_handles = handle->object;
handle->object = object;
handle->type = type;
return index;
}
if (!(schan_handle_count < schan_handle_table_size))
{
/* Grow the table */
SIZE_T new_size = schan_handle_table_size + (schan_handle_table_size >> 1);
struct schan_handle *new_table = realloc(schan_handle_table, new_size * sizeof(*schan_handle_table));
if (!new_table)
{
ERR("Failed to grow the handle table\n");
return SCHAN_INVALID_HANDLE;
}
schan_handle_table = new_table;
schan_handle_table_size = new_size;
}
handle = &schan_handle_table[schan_handle_count++];
handle->object = object;
handle->type = type;
return handle - schan_handle_table;
}
static void *schan_free_handle(ULONG_PTR handle_idx, enum schan_handle_type type)
{
struct schan_handle *handle;
void *object;
if (handle_idx == SCHAN_INVALID_HANDLE) return NULL;
if (handle_idx >= schan_handle_count) return NULL;
handle = &schan_handle_table[handle_idx];
if (handle->type != type)
{
ERR("Handle %ld(%p) is not of type %#x\n", handle_idx, handle, type);
return NULL;
}
object = handle->object;
handle->object = schan_free_handles;
handle->type = SCHAN_HANDLE_FREE;
schan_free_handles = handle;
return object;
}
static void *schan_get_object(ULONG_PTR handle_idx, enum schan_handle_type type)
{
struct schan_handle *handle;
if (handle_idx == SCHAN_INVALID_HANDLE) return NULL;
if (handle_idx >= schan_handle_count) return NULL;
handle = &schan_handle_table[handle_idx];
if (handle->type != type)
{
ERR("Handle %ld(%p) is not of type %#x\n", handle_idx, handle, type);
return NULL;
}
return handle->object;
}
static void read_config(void)
{
DWORD enabled = 0, default_disabled = 0;
HKEY protocols_key, key;
WCHAR subkey_name[64];
unsigned i;
DWORD res;
static BOOL config_read = FALSE;
static const struct {
WCHAR key_name[20];
DWORD prot_client_flag;
BOOL enabled; /* If no config is present, enable the protocol */
BOOL disabled_by_default; /* Disable if caller asks for default protocol set */
} protocol_config_keys[] = {
{ L"SSL 2.0", SP_PROT_SSL2_CLIENT, FALSE, TRUE }, /* NOTE: TRUE, TRUE on Windows */
{ L"SSL 3.0", SP_PROT_SSL3_CLIENT, TRUE, FALSE },
{ L"TLS 1.0", SP_PROT_TLS1_0_CLIENT, TRUE, FALSE },
{ L"TLS 1.1", SP_PROT_TLS1_1_CLIENT, TRUE, FALSE /* NOTE: not enabled by default on Windows */ },
{ L"TLS 1.2", SP_PROT_TLS1_2_CLIENT, TRUE, FALSE /* NOTE: not enabled by default on Windows */ },
{ L"DTLS 1.0", SP_PROT_DTLS1_0_CLIENT, TRUE, TRUE },
{ L"DTLS 1.2", SP_PROT_DTLS1_2_CLIENT, TRUE, TRUE },
};
/* No need for thread safety */
if(config_read)
return;
res = RegOpenKeyExW(HKEY_LOCAL_MACHINE,
L"SYSTEM\\CurrentControlSet\\Control\\SecurityProviders\\SCHANNEL\\Protocols", 0, KEY_READ,
&protocols_key);
if(res == ERROR_SUCCESS) {
DWORD type, size, value;
for(i = 0; i < ARRAY_SIZE(protocol_config_keys); i++) {
wcscpy(subkey_name, protocol_config_keys[i].key_name);
wcscat(subkey_name, L"\\Client");
res = RegOpenKeyExW(protocols_key, subkey_name, 0, KEY_READ, &key);
if(res != ERROR_SUCCESS) {
if(protocol_config_keys[i].enabled)
enabled |= protocol_config_keys[i].prot_client_flag;
if(protocol_config_keys[i].disabled_by_default)
default_disabled |= protocol_config_keys[i].prot_client_flag;
continue;
}
size = sizeof(value);
res = RegQueryValueExW(key, L"enabled", NULL, &type, (BYTE *)&value, &size);
if(res == ERROR_SUCCESS) {
if(type == REG_DWORD && value)
enabled |= protocol_config_keys[i].prot_client_flag;
}else if(protocol_config_keys[i].enabled) {
enabled |= protocol_config_keys[i].prot_client_flag;
}
size = sizeof(value);
res = RegQueryValueExW(key, L"DisabledByDefault", NULL, &type, (BYTE *)&value, &size);
if(res == ERROR_SUCCESS) {
if(type != REG_DWORD || value)
default_disabled |= protocol_config_keys[i].prot_client_flag;
}else if(protocol_config_keys[i].disabled_by_default) {
default_disabled |= protocol_config_keys[i].prot_client_flag;
}
RegCloseKey(key);
}
}else {
/* No config, enable all known protocols. */
for(i = 0; i < ARRAY_SIZE(protocol_config_keys); i++) {
if(protocol_config_keys[i].enabled)
enabled |= protocol_config_keys[i].prot_client_flag;
if(protocol_config_keys[i].disabled_by_default)
default_disabled |= protocol_config_keys[i].prot_client_flag;
}
}
RegCloseKey(protocols_key);
config_enabled_protocols = enabled & schan_funcs->get_enabled_protocols();
config_default_disabled_protocols = default_disabled;
config_read = TRUE;
TRACE("enabled %x, disabled by default %x\n", config_enabled_protocols, config_default_disabled_protocols);
}
static SECURITY_STATUS schan_QueryCredentialsAttributes(
PCredHandle phCredential, ULONG ulAttribute, VOID *pBuffer)
{
struct schan_credentials *cred;
SECURITY_STATUS ret;
cred = schan_get_object(phCredential->dwLower, SCHAN_HANDLE_CRED);
if(!cred)
return SEC_E_INVALID_HANDLE;
switch (ulAttribute)
{
case SECPKG_ATTR_SUPPORTED_ALGS:
if (pBuffer)
{
/* FIXME: get from CryptoAPI */
FIXME("SECPKG_ATTR_SUPPORTED_ALGS: stub\n");
ret = SEC_E_UNSUPPORTED_FUNCTION;
}
else
ret = SEC_E_INTERNAL_ERROR;
break;
case SECPKG_ATTR_CIPHER_STRENGTHS:
if (pBuffer)
{
SecPkgCred_CipherStrengths *r = pBuffer;
/* FIXME: get from CryptoAPI */
FIXME("SECPKG_ATTR_CIPHER_STRENGTHS: semi-stub\n");
r->dwMinimumCipherStrength = 40;
r->dwMaximumCipherStrength = 168;
ret = SEC_E_OK;
}
else
ret = SEC_E_INTERNAL_ERROR;
break;
case SECPKG_ATTR_SUPPORTED_PROTOCOLS:
if(pBuffer) {
/* Regardless of MSDN documentation, tests show that this attribute takes into account
* what protocols are enabled for given credential. */
((SecPkgCred_SupportedProtocols*)pBuffer)->grbitProtocol = cred->enabled_protocols;
ret = SEC_E_OK;
}else {
ret = SEC_E_INTERNAL_ERROR;
}
break;
default:
ret = SEC_E_UNSUPPORTED_FUNCTION;
}
return ret;
}
static SECURITY_STATUS SEC_ENTRY schan_QueryCredentialsAttributesA(
PCredHandle phCredential, ULONG ulAttribute, PVOID pBuffer)
{
SECURITY_STATUS ret;
TRACE("(%p, %d, %p)\n", phCredential, ulAttribute, pBuffer);
switch (ulAttribute)
{
case SECPKG_CRED_ATTR_NAMES:
FIXME("SECPKG_CRED_ATTR_NAMES: stub\n");
ret = SEC_E_UNSUPPORTED_FUNCTION;
break;
default:
ret = schan_QueryCredentialsAttributes(phCredential, ulAttribute,
pBuffer);
}
return ret;
}
static SECURITY_STATUS SEC_ENTRY schan_QueryCredentialsAttributesW(
PCredHandle phCredential, ULONG ulAttribute, PVOID pBuffer)
{
SECURITY_STATUS ret;
TRACE("(%p, %d, %p)\n", phCredential, ulAttribute, pBuffer);
switch (ulAttribute)
{
case SECPKG_CRED_ATTR_NAMES:
FIXME("SECPKG_CRED_ATTR_NAMES: stub\n");
ret = SEC_E_UNSUPPORTED_FUNCTION;
break;
default:
ret = schan_QueryCredentialsAttributes(phCredential, ulAttribute,
pBuffer);
}
return ret;
}
static SECURITY_STATUS get_cert(const SCHANNEL_CRED *cred, CERT_CONTEXT const **cert)
{
SECURITY_STATUS status;
DWORD i;
TRACE("dwVersion = %u\n", cred->dwVersion);
TRACE("cCreds = %u\n", cred->cCreds);
TRACE("paCred = %p\n", cred->paCred);
TRACE("hRootStore = %p\n", cred->hRootStore);
TRACE("cMappers = %u\n", cred->cMappers);
TRACE("cSupportedAlgs = %u:\n", cred->cSupportedAlgs);
for (i = 0; i < cred->cSupportedAlgs; i++) TRACE("%08x\n", cred->palgSupportedAlgs[i]);
TRACE("grbitEnabledProtocols = %08x\n", cred->grbitEnabledProtocols);
TRACE("dwMinimumCipherStrength = %u\n", cred->dwMinimumCipherStrength);
TRACE("dwMaximumCipherStrength = %u\n", cred->dwMaximumCipherStrength);
TRACE("dwSessionLifespan = %u\n", cred->dwSessionLifespan);
TRACE("dwFlags = %08x\n", cred->dwFlags);
TRACE("dwCredFormat = %u\n", cred->dwCredFormat);
switch (cred->dwVersion)
{
case SCH_CRED_V3:
case SCHANNEL_CRED_VERSION:
break;
default:
return SEC_E_INTERNAL_ERROR;
}
if (!cred->cCreds) status = SEC_E_NO_CREDENTIALS;
else if (cred->cCreds > 1) status = SEC_E_UNKNOWN_CREDENTIALS;
else
{
DWORD spec;
HCRYPTPROV prov;
BOOL free;
if (CryptAcquireCertificatePrivateKey(cred->paCred[0], CRYPT_ACQUIRE_CACHE_FLAG, NULL, &prov, &spec, &free))
{
if (free) CryptReleaseContext(prov, 0);
*cert = cred->paCred[0];
status = SEC_E_OK;
}
else status = SEC_E_UNKNOWN_CREDENTIALS;
}
return status;
}
static WCHAR *get_key_container_path(const CERT_CONTEXT *ctx)
{
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 = RtlAllocateHeap(GetProcessHeap(), 0, 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 = RtlAllocateHeap(GetProcessHeap(), 0, sizeof(L"Software\\Wine\\Crypto\\RSA\\") + len * sizeof(WCHAR))))
{
RtlFreeHeap(GetProcessHeap(), 0, str);
return NULL;
}
wcscpy(ret, L"Software\\Wine\\Crypto\\RSA\\");
MultiByteToWideChar(CP_ACP, 0, str, -1, ret + wcslen(ret), len);
RtlFreeHeap(GetProcessHeap(), 0, str);
}
else if (CertGetCertificateContextProperty(ctx, CERT_KEY_PROV_INFO_PROP_ID, NULL, &prov_size))
{
if (!(prov = RtlAllocateHeap(GetProcessHeap(), 0, prov_size))) return NULL;
if (!CertGetCertificateContextProperty(ctx, CERT_KEY_PROV_INFO_PROP_ID, prov, &prov_size))
{
RtlFreeHeap(GetProcessHeap(), 0, prov);
return NULL;
}
if (!(ret = RtlAllocateHeap(GetProcessHeap(), 0,
sizeof(L"Software\\Wine\\Crypto\\RSA\\") + wcslen(prov->pwszContainerName) * sizeof(WCHAR))))
{
RtlFreeHeap(GetProcessHeap(), 0, prov);
return NULL;
}
wcscpy(ret, L"Software\\Wine\\Crypto\\RSA\\");
wcscat(ret, prov->pwszContainerName);
RtlFreeHeap(GetProcessHeap(), 0, prov);
}
if (!ret && GetUserNameW(username, &len) &&
(ret = RtlAllocateHeap(GetProcessHeap(), 0, sizeof(L"Software\\Wine\\Crypto\\RSA\\") + len * sizeof(WCHAR))))
{
wcscpy(ret, L"Software\\Wine\\Crypto\\RSA\\");
wcscat(ret, username);
}
return ret;
}
#define MAX_LEAD_BYTES 8
static BYTE *get_key_blob(const CERT_CONTEXT *ctx, DWORD *size)
{
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))
{
RtlFreeHeap(GetProcessHeap(), 0, path);
return NULL;
}
RtlFreeHeap(GetProcessHeap(), 0, path);
if (!RegQueryValueExW(hkey, L"KeyExchangeKeyPair", 0, &type, NULL, &len)) spec = AT_KEYEXCHANGE;
else if (!RegQueryValueExW(hkey, L"SignatureKeyPair", 0, &type, NULL, &len)) spec = AT_SIGNATURE;
else
{
RegCloseKey(hkey);
return NULL;
}
if (!(buf = RtlAllocateHeap(GetProcessHeap(), 0, len + MAX_LEAD_BYTES)))
{
RegCloseKey(hkey);
return NULL;
}
if (!RegQueryValueExW(hkey, (spec == AT_KEYEXCHANGE) ? L"KeyExchangeKeyPair" : L"SignatureKeyPair", 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 RtlFreeHeap(GetProcessHeap(), 0, buf);
RegCloseKey(hkey);
return ret;
}
static SECURITY_STATUS schan_AcquireClientCredentials(const SCHANNEL_CRED *schanCred,
PCredHandle phCredential, PTimeStamp ptsExpiry)
{
struct schan_credentials *creds;
unsigned enabled_protocols;
ULONG_PTR handle;
SECURITY_STATUS status = SEC_E_OK;
const CERT_CONTEXT *cert = NULL;
DATA_BLOB key_blob = {0};
TRACE("schanCred %p, phCredential %p, ptsExpiry %p\n", schanCred, phCredential, ptsExpiry);
if (schanCred)
{
const unsigned dtls_protocols = SP_PROT_DTLS_CLIENT | SP_PROT_DTLS1_2_CLIENT;
const unsigned tls_protocols = SP_PROT_TLS1_CLIENT | SP_PROT_TLS1_0_CLIENT | SP_PROT_TLS1_1_CLIENT |
SP_PROT_TLS1_2_CLIENT | SP_PROT_TLS1_3_CLIENT;
status = get_cert(schanCred, &cert);
if (status != SEC_E_OK && status != SEC_E_NO_CREDENTIALS)
return status;
if ((schanCred->grbitEnabledProtocols & tls_protocols) &&
(schanCred->grbitEnabledProtocols & dtls_protocols)) return SEC_E_ALGORITHM_MISMATCH;
status = SEC_E_OK;
}
read_config();
if(schanCred && schanCred->grbitEnabledProtocols)
enabled_protocols = schanCred->grbitEnabledProtocols & config_enabled_protocols;
else
enabled_protocols = config_enabled_protocols & ~config_default_disabled_protocols;
if(!enabled_protocols) {
ERR("Could not find matching protocol\n");
return SEC_E_NO_AUTHENTICATING_AUTHORITY;
}
if (!(creds = malloc(sizeof(*creds)))) return SEC_E_INSUFFICIENT_MEMORY;
creds->credential_use = SECPKG_CRED_OUTBOUND;
creds->enabled_protocols = enabled_protocols;
if (cert && !(key_blob.pbData = get_key_blob(cert, &key_blob.cbData))) goto fail;
if (!schan_funcs->allocate_certificate_credentials(creds, cert, &key_blob)) goto fail;
RtlFreeHeap(GetProcessHeap(), 0, key_blob.pbData);
handle = schan_alloc_handle(creds, SCHAN_HANDLE_CRED);
if (handle == SCHAN_INVALID_HANDLE) goto fail;
phCredential->dwLower = handle;
phCredential->dwUpper = 0;
/* Outbound credentials have no expiry */
if (ptsExpiry)
{
ptsExpiry->LowPart = 0;
ptsExpiry->HighPart = 0;
}
return status;
fail:
free(creds);
RtlFreeHeap(GetProcessHeap(), 0, key_blob.pbData);
return SEC_E_INTERNAL_ERROR;
}
static SECURITY_STATUS schan_AcquireServerCredentials(const SCHANNEL_CRED *schanCred,
PCredHandle phCredential, PTimeStamp ptsExpiry)
{
SECURITY_STATUS status;
const CERT_CONTEXT *cert = NULL;
TRACE("schanCred %p, phCredential %p, ptsExpiry %p\n", schanCred, phCredential, ptsExpiry);
if (!schanCred) return SEC_E_NO_CREDENTIALS;
status = get_cert(schanCred, &cert);
if (status == SEC_E_OK)
{
ULONG_PTR handle;
struct schan_credentials *creds;
if (!(creds = calloc(1, sizeof(*creds)))) return SEC_E_INSUFFICIENT_MEMORY;
creds->credential_use = SECPKG_CRED_INBOUND;
handle = schan_alloc_handle(creds, SCHAN_HANDLE_CRED);
if (handle == SCHAN_INVALID_HANDLE)
{
free(creds);
return SEC_E_INTERNAL_ERROR;
}
phCredential->dwLower = handle;
phCredential->dwUpper = 0;
/* FIXME: get expiry from cert */
}
return status;
}
static SECURITY_STATUS schan_AcquireCredentialsHandle(ULONG fCredentialUse,
const SCHANNEL_CRED *schanCred, PCredHandle phCredential, PTimeStamp ptsExpiry)
{
SECURITY_STATUS ret;
if (fCredentialUse == SECPKG_CRED_OUTBOUND)
ret = schan_AcquireClientCredentials(schanCred, phCredential,
ptsExpiry);
else
ret = schan_AcquireServerCredentials(schanCred, phCredential,
ptsExpiry);
return ret;
}
static SECURITY_STATUS SEC_ENTRY schan_AcquireCredentialsHandleA(
SEC_CHAR *pszPrincipal, SEC_CHAR *pszPackage, ULONG fCredentialUse,
PLUID pLogonID, PVOID pAuthData, SEC_GET_KEY_FN pGetKeyFn,
PVOID pGetKeyArgument, PCredHandle phCredential, PTimeStamp ptsExpiry)
{
TRACE("(%s, %s, 0x%08x, %p, %p, %p, %p, %p, %p)\n",
debugstr_a(pszPrincipal), debugstr_a(pszPackage), fCredentialUse,
pLogonID, pAuthData, pGetKeyFn, pGetKeyArgument, phCredential, ptsExpiry);
return schan_AcquireCredentialsHandle(fCredentialUse,
pAuthData, phCredential, ptsExpiry);
}
static SECURITY_STATUS SEC_ENTRY schan_AcquireCredentialsHandleW(
SEC_WCHAR *pszPrincipal, SEC_WCHAR *pszPackage, ULONG fCredentialUse,
PLUID pLogonID, PVOID pAuthData, SEC_GET_KEY_FN pGetKeyFn,
PVOID pGetKeyArgument, PCredHandle phCredential, PTimeStamp ptsExpiry)
{
TRACE("(%s, %s, 0x%08x, %p, %p, %p, %p, %p, %p)\n",
debugstr_w(pszPrincipal), debugstr_w(pszPackage), fCredentialUse,
pLogonID, pAuthData, pGetKeyFn, pGetKeyArgument, phCredential, ptsExpiry);
return schan_AcquireCredentialsHandle(fCredentialUse,
pAuthData, phCredential, ptsExpiry);
}
static SECURITY_STATUS SEC_ENTRY schan_FreeCredentialsHandle(
PCredHandle phCredential)
{
struct schan_credentials *creds;
TRACE("phCredential %p\n", phCredential);
if (!phCredential) return SEC_E_INVALID_HANDLE;
creds = schan_free_handle(phCredential->dwLower, SCHAN_HANDLE_CRED);
if (!creds) return SEC_E_INVALID_HANDLE;
if (creds->credential_use == SECPKG_CRED_OUTBOUND) schan_funcs->free_certificate_credentials(creds);
free(creds);
return SEC_E_OK;
}
static void init_schan_buffers(struct schan_buffers *s, const PSecBufferDesc desc,
int (*get_next_buffer)(const struct schan_transport *, struct schan_buffers *))
{
s->offset = 0;
s->limit = ~0UL;
s->desc = desc;
s->current_buffer_idx = -1;
s->allow_buffer_resize = FALSE;
s->get_next_buffer = get_next_buffer;
}
static int schan_find_sec_buffer_idx(const SecBufferDesc *desc, unsigned int start_idx, ULONG buffer_type)
{
unsigned int i;
PSecBuffer buffer;
for (i = start_idx; i < desc->cBuffers; ++i)
{
buffer = &desc->pBuffers[i];
if (buffer->BufferType == buffer_type) return i;
}
return -1;
}
static void schan_resize_current_buffer(const struct schan_buffers *s, SIZE_T min_size)
{
SecBuffer *b = &s->desc->pBuffers[s->current_buffer_idx];
SIZE_T new_size = b->cbBuffer ? b->cbBuffer * 2 : 128;
void *new_data;
if (b->cbBuffer >= min_size || !s->allow_buffer_resize || min_size > UINT_MAX / 2) return;
while (new_size < min_size) new_size *= 2;
if (b->pvBuffer) /* freed with FreeContextBuffer */
new_data = RtlReAllocateHeap(GetProcessHeap(), 0, b->pvBuffer, new_size);
else
new_data = RtlAllocateHeap(GetProcessHeap(), 0, new_size);
if (!new_data)
{
TRACE("Failed to resize %p from %d to %ld\n", b->pvBuffer, b->cbBuffer, new_size);
return;
}
b->cbBuffer = new_size;
b->pvBuffer = new_data;
}
static char * CDECL schan_get_buffer(const struct schan_transport *t, struct schan_buffers *s, SIZE_T *count)
{
SIZE_T max_count;
PSecBuffer buffer;
if (!s->desc)
{
TRACE("No desc\n");
return NULL;
}
if (s->current_buffer_idx == -1)
{
/* Initial buffer */
int buffer_idx = s->get_next_buffer(t, s);
if (buffer_idx == -1)
{
TRACE("No next buffer\n");
return NULL;
}
s->current_buffer_idx = buffer_idx;
}
buffer = &s->desc->pBuffers[s->current_buffer_idx];
TRACE("Using buffer %d: cbBuffer %d, BufferType %#x, pvBuffer %p\n", s->current_buffer_idx, buffer->cbBuffer, buffer->BufferType, buffer->pvBuffer);
schan_resize_current_buffer(s, s->offset + *count);
max_count = buffer->cbBuffer - s->offset;
if (s->limit != ~0UL && s->limit < max_count)
max_count = s->limit;
if (!max_count)
{
int buffer_idx;
s->allow_buffer_resize = FALSE;
buffer_idx = s->get_next_buffer(t, s);
if (buffer_idx == -1)
{
TRACE("No next buffer\n");
return NULL;
}
s->current_buffer_idx = buffer_idx;
s->offset = 0;
return schan_get_buffer(t, s, count);
}
if (*count > max_count)
*count = max_count;
if (s->limit != ~0UL)
s->limit -= *count;
return (char *)buffer->pvBuffer + s->offset;
}
/* schan_pull
* Read data from the transport input buffer.
*
* t - The session transport object.
* buff - The buffer into which to store the read data. Must be at least
* *buff_len bytes in length.
* buff_len - On input, *buff_len is the desired length to read. On successful
* return, *buff_len is the number of bytes actually read.
*
* Returns:
* 0 on success, in which case:
* *buff_len == 0 indicates end of file.
* *buff_len > 0 indicates that some data was read. May be less than
* what was requested, in which case the caller should call again if/
* when they want more.
* -1 when no data could be read without blocking
* another errno-style error value on failure
*/
static int CDECL schan_pull(struct schan_transport *t, void *buff, size_t *buff_len)
{
char *b;
SIZE_T local_len = *buff_len;
TRACE("Pull %lu bytes\n", local_len);
*buff_len = 0;
b = schan_get_buffer(t, &t->in, &local_len);
if (!b)
return -1;
memcpy(buff, b, local_len);
t->in.offset += local_len;
TRACE("Read %lu bytes\n", local_len);
*buff_len = local_len;
return 0;
}
/* schan_push
* Write data to the transport output buffer.
*
* t - The session transport object.
* buff - The buffer of data to write. Must be at least *buff_len bytes in length.
* buff_len - On input, *buff_len is the desired length to write. On successful
* return, *buff_len is the number of bytes actually written.
*
* Returns:
* 0 on success
* *buff_len will be > 0 indicating how much data was written. May be less
* than what was requested, in which case the caller should call again
* if/when they want to write more.
* -1 when no data could be written without blocking
* another errno-style error value on failure
*/
static int CDECL schan_push(struct schan_transport *t, const void *buff, size_t *buff_len)
{
char *b;
SIZE_T local_len = *buff_len;
TRACE("Push %lu bytes\n", local_len);
*buff_len = 0;
b = schan_get_buffer(t, &t->out, &local_len);
if (!b)
return -1;
memcpy(b, buff, local_len);
t->out.offset += local_len;
TRACE("Wrote %lu bytes\n", local_len);
*buff_len = local_len;
return 0;
}
static schan_session CDECL schan_get_session_for_transport(struct schan_transport* t)
{
return t->ctx->session;
}
static int schan_init_sec_ctx_get_next_input_buffer(const struct schan_transport *t, struct schan_buffers *s)
{
if (s->current_buffer_idx != -1)
return -1;
return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_TOKEN);
}
static int schan_init_sec_ctx_get_next_output_buffer(const struct schan_transport *t, struct schan_buffers *s)
{
if (s->current_buffer_idx == -1)
{
int idx = schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_TOKEN);
if (t->ctx->req_ctx_attr & ISC_REQ_ALLOCATE_MEMORY)
{
if (idx == -1)
{
idx = schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_EMPTY);
if (idx != -1) s->desc->pBuffers[idx].BufferType = SECBUFFER_TOKEN;
}
if (idx != -1 && !s->desc->pBuffers[idx].pvBuffer)
{
s->desc->pBuffers[idx].cbBuffer = 0;
s->allow_buffer_resize = TRUE;
}
}
return idx;
}
return -1;
}
static void dump_buffer_desc(SecBufferDesc *desc)
{
unsigned int i;
if (!desc) return;
TRACE("Buffer desc %p:\n", desc);
for (i = 0; i < desc->cBuffers; ++i)
{
SecBuffer *b = &desc->pBuffers[i];
TRACE("\tbuffer %u: cbBuffer %d, BufferType %#x pvBuffer %p\n", i, b->cbBuffer, b->BufferType, b->pvBuffer);
}
}
#define HEADER_SIZE_TLS 5
#define HEADER_SIZE_DTLS 13
static inline SIZE_T read_record_size(const BYTE *buf, SIZE_T header_size)
{
return (buf[header_size - 2] << 8) | buf[header_size - 1];
}
static inline BOOL is_dtls_context(const struct schan_context *ctx)
{
return (ctx->header_size == HEADER_SIZE_DTLS);
}
/***********************************************************************
* InitializeSecurityContextW
*/
static SECURITY_STATUS SEC_ENTRY schan_InitializeSecurityContextW(
PCredHandle phCredential, PCtxtHandle phContext, SEC_WCHAR *pszTargetName,
ULONG fContextReq, ULONG Reserved1, ULONG TargetDataRep,
PSecBufferDesc pInput, ULONG Reserved2, PCtxtHandle phNewContext,
PSecBufferDesc pOutput, ULONG *pfContextAttr, PTimeStamp ptsExpiry)
{
struct schan_context *ctx;
struct schan_buffers *out_buffers;
struct schan_credentials *cred;
SIZE_T expected_size = ~0UL;
SECURITY_STATUS ret;
SecBuffer *buffer;
int idx;
TRACE("%p %p %s 0x%08x %d %d %p %d %p %p %p %p\n", phCredential, phContext,
debugstr_w(pszTargetName), fContextReq, Reserved1, TargetDataRep, pInput,
Reserved1, phNewContext, pOutput, pfContextAttr, ptsExpiry);
dump_buffer_desc(pInput);
dump_buffer_desc(pOutput);
if (!phContext)
{
ULONG_PTR handle;
if (!phCredential) return SEC_E_INVALID_HANDLE;
cred = schan_get_object(phCredential->dwLower, SCHAN_HANDLE_CRED);
if (!cred) return SEC_E_INVALID_HANDLE;
if (!(cred->credential_use & SECPKG_CRED_OUTBOUND))
{
WARN("Invalid credential use %#x\n", cred->credential_use);
return SEC_E_INVALID_HANDLE;
}
if (!(ctx = malloc(sizeof(*ctx)))) return SEC_E_INSUFFICIENT_MEMORY;
ctx->cert = NULL;
handle = schan_alloc_handle(ctx, SCHAN_HANDLE_CTX);
if (handle == SCHAN_INVALID_HANDLE)
{
free(ctx);
return SEC_E_INTERNAL_ERROR;
}
if (!schan_funcs->create_session(&ctx->session, cred))
{
schan_free_handle(handle, SCHAN_HANDLE_CTX);
free(ctx);
return SEC_E_INTERNAL_ERROR;
}
if (cred->enabled_protocols & (SP_PROT_DTLS1_0_CLIENT | SP_PROT_DTLS1_2_CLIENT))
ctx->header_size = HEADER_SIZE_DTLS;
else
ctx->header_size = HEADER_SIZE_TLS;
ctx->transport.ctx = ctx;
schan_funcs->set_session_transport(ctx->session, &ctx->transport);
if (pszTargetName && *pszTargetName)
{
UINT len = WideCharToMultiByte( CP_UNIXCP, 0, pszTargetName, -1, NULL, 0, NULL, NULL );
char *target = malloc( len );
if (target)
{
WideCharToMultiByte( CP_UNIXCP, 0, pszTargetName, -1, target, len, NULL, NULL );
schan_funcs->set_session_target( ctx->session, target );
free( target );
}
}
if (pInput && (idx = schan_find_sec_buffer_idx(pInput, 0, SECBUFFER_APPLICATION_PROTOCOLS)) != -1)
{
buffer = &pInput->pBuffers[idx];
schan_funcs->set_application_protocols(ctx->session, buffer->pvBuffer, buffer->cbBuffer);
}
if (pInput && (idx = schan_find_sec_buffer_idx(pInput, 0, SECBUFFER_DTLS_MTU)) != -1)
{
buffer = &pInput->pBuffers[idx];
if (buffer->cbBuffer >= sizeof(WORD)) schan_funcs->set_dtls_mtu(ctx->session, *(WORD *)buffer->pvBuffer);
else WARN("invalid buffer size %u\n", buffer->cbBuffer);
}
phNewContext->dwLower = handle;
phNewContext->dwUpper = 0;
}
else
{
SIZE_T record_size = 0;
unsigned char *ptr;
ctx = schan_get_object(phContext->dwLower, SCHAN_HANDLE_CTX);
if (pInput)
{
idx = schan_find_sec_buffer_idx(pInput, 0, SECBUFFER_TOKEN);
if (idx == -1)
return SEC_E_INCOMPLETE_MESSAGE;
buffer = &pInput->pBuffers[idx];
ptr = buffer->pvBuffer;
expected_size = 0;
while (buffer->cbBuffer > expected_size + ctx->header_size)
{
record_size = ctx->header_size + read_record_size(ptr, ctx->header_size);
if (buffer->cbBuffer < expected_size + record_size)
break;
expected_size += record_size;
ptr += record_size;
}
if (!expected_size)
{
TRACE("Expected at least %lu bytes, but buffer only contains %u bytes.\n",
max(6, record_size), buffer->cbBuffer);
return SEC_E_INCOMPLETE_MESSAGE;
}
}
else if (!is_dtls_context(ctx)) return SEC_E_INCOMPLETE_MESSAGE;
TRACE("Using expected_size %lu.\n", expected_size);
}
ctx->req_ctx_attr = fContextReq;
init_schan_buffers(&ctx->transport.in, pInput, schan_init_sec_ctx_get_next_input_buffer);
ctx->transport.in.limit = expected_size;
init_schan_buffers(&ctx->transport.out, pOutput, schan_init_sec_ctx_get_next_output_buffer);
/* Perform the TLS handshake */
ret = schan_funcs->handshake(ctx->session);
out_buffers = &ctx->transport.out;
if (out_buffers->current_buffer_idx != -1)
{
SecBuffer *buffer = &out_buffers->desc->pBuffers[out_buffers->current_buffer_idx];
buffer->cbBuffer = out_buffers->offset;
}
else if (out_buffers->desc && out_buffers->desc->cBuffers > 0)
{
SecBuffer *buffer = &out_buffers->desc->pBuffers[0];
buffer->cbBuffer = 0;
}
if(ctx->transport.in.offset && ctx->transport.in.offset != pInput->pBuffers[0].cbBuffer) {
if(pInput->cBuffers<2 || pInput->pBuffers[1].BufferType!=SECBUFFER_EMPTY)
return SEC_E_INVALID_TOKEN;
pInput->pBuffers[1].BufferType = SECBUFFER_EXTRA;
pInput->pBuffers[1].cbBuffer = pInput->pBuffers[0].cbBuffer-ctx->transport.in.offset;
}
*pfContextAttr = ISC_RET_REPLAY_DETECT | ISC_RET_SEQUENCE_DETECT | ISC_RET_CONFIDENTIALITY | ISC_RET_STREAM;
if (ctx->req_ctx_attr & ISC_REQ_EXTENDED_ERROR) *pfContextAttr |= ISC_RET_EXTENDED_ERROR;
if (ctx->req_ctx_attr & ISC_REQ_DATAGRAM) *pfContextAttr |= ISC_RET_DATAGRAM;
if (ctx->req_ctx_attr & ISC_REQ_ALLOCATE_MEMORY) *pfContextAttr |= ISC_RET_ALLOCATED_MEMORY;
if (ctx->req_ctx_attr & ISC_REQ_USE_SUPPLIED_CREDS) *pfContextAttr |= ISC_RET_USED_SUPPLIED_CREDS;
if (ctx->req_ctx_attr & ISC_REQ_MANUAL_CRED_VALIDATION) *pfContextAttr |= ISC_RET_MANUAL_CRED_VALIDATION;
return ret;
}
/***********************************************************************
* InitializeSecurityContextA
*/
static SECURITY_STATUS SEC_ENTRY schan_InitializeSecurityContextA(
PCredHandle phCredential, PCtxtHandle phContext, SEC_CHAR *pszTargetName,
ULONG fContextReq, ULONG Reserved1, ULONG TargetDataRep,
PSecBufferDesc pInput, ULONG Reserved2, PCtxtHandle phNewContext,
PSecBufferDesc pOutput, ULONG *pfContextAttr, PTimeStamp ptsExpiry)
{
SECURITY_STATUS ret;
SEC_WCHAR *target_name = NULL;
TRACE("%p %p %s %d %d %d %p %d %p %p %p %p\n", phCredential, phContext,
debugstr_a(pszTargetName), fContextReq, Reserved1, TargetDataRep, pInput,
Reserved1, phNewContext, pOutput, pfContextAttr, ptsExpiry);
if (pszTargetName)
{
INT len = MultiByteToWideChar(CP_ACP, 0, pszTargetName, -1, NULL, 0);
if (!(target_name = malloc(len * sizeof(*target_name)))) return SEC_E_INSUFFICIENT_MEMORY;
MultiByteToWideChar(CP_ACP, 0, pszTargetName, -1, target_name, len);
}
ret = schan_InitializeSecurityContextW(phCredential, phContext, target_name,
fContextReq, Reserved1, TargetDataRep, pInput, Reserved2,
phNewContext, pOutput, pfContextAttr, ptsExpiry);
free(target_name);
return ret;
}
static void *get_alg_name(ALG_ID id, BOOL wide)
{
static const struct {
ALG_ID alg_id;
const char* name;
const WCHAR nameW[8];
} alg_name_map[] = {
{ CALG_ECDSA, "ECDSA", L"ECDSA" },
{ CALG_RSA_SIGN, "RSA", L"RSA" },
{ CALG_DES, "DES", L"DES" },
{ CALG_RC2, "RC2", L"RC2" },
{ CALG_3DES, "3DES", L"3DES" },
{ CALG_AES_128, "AES", L"AES" },
{ CALG_AES_192, "AES", L"AES" },
{ CALG_AES_256, "AES", L"AES" },
{ CALG_RC4, "RC4", L"RC4" },
};
unsigned i;
for (i = 0; i < ARRAY_SIZE(alg_name_map); i++)
if (alg_name_map[i].alg_id == id)
return wide ? (void*)alg_name_map[i].nameW : (void*)alg_name_map[i].name;
FIXME("Unknown ALG_ID %04x\n", id);
return NULL;
}
static SECURITY_STATUS ensure_remote_cert(struct schan_context *ctx)
{
HCERTSTORE store;
PCCERT_CONTEXT cert = NULL;
SECURITY_STATUS status;
struct schan_cert_list list;
if (ctx->cert) return SEC_E_OK;
if (!(store = CertOpenStore(CERT_STORE_PROV_MEMORY, 0, 0, CERT_STORE_CREATE_NEW_FLAG, NULL)))
return GetLastError();
if ((status = schan_funcs->get_session_peer_certificate(ctx->session, &list)) == SEC_E_OK)
{
unsigned int i;
for (i = 0; i < list.count; i++)
{
if (!CertAddEncodedCertificateToStore(store, X509_ASN_ENCODING, list.certs[i].pbData,
list.certs[i].cbData, CERT_STORE_ADD_REPLACE_EXISTING,
i ? NULL : &cert))
{
if (i) CertFreeCertificateContext(cert);
return GetLastError();
}
}
RtlFreeHeap(GetProcessHeap(), 0, list.certs);
}
ctx->cert = cert;
CertCloseStore(store, 0);
return status;
}
static SECURITY_STATUS SEC_ENTRY schan_QueryContextAttributesW(
PCtxtHandle context_handle, ULONG attribute, PVOID buffer)
{
struct schan_context *ctx;
SECURITY_STATUS status;
TRACE("context_handle %p, attribute %#x, buffer %p\n",
context_handle, attribute, buffer);
if (!context_handle) return SEC_E_INVALID_HANDLE;
ctx = schan_get_object(context_handle->dwLower, SCHAN_HANDLE_CTX);
switch(attribute)
{
case SECPKG_ATTR_STREAM_SIZES:
{
SecPkgContext_ConnectionInfo info;
status = schan_funcs->get_connection_info(ctx->session, &info);
if (status == SEC_E_OK)
{
SecPkgContext_StreamSizes *stream_sizes = buffer;
SIZE_T mac_size = info.dwHashStrength;
unsigned int block_size = schan_funcs->get_session_cipher_block_size(ctx->session);
unsigned int message_size = schan_funcs->get_max_message_size(ctx->session);
TRACE("Using header size %lu mac bytes %lu, message size %u, block size %u\n",
ctx->header_size, mac_size, message_size, block_size);
/* These are defined by the TLS RFC */
stream_sizes->cbHeader = ctx->header_size;
stream_sizes->cbTrailer = mac_size + 256; /* Max 255 bytes padding + 1 for padding size */
stream_sizes->cbMaximumMessage = message_size;
stream_sizes->cbBuffers = 4;
stream_sizes->cbBlockSize = block_size;
}
return status;
}
case SECPKG_ATTR_KEY_INFO:
{
SecPkgContext_ConnectionInfo conn_info;
status = schan_funcs->get_connection_info(ctx->session, &conn_info);
if (status == SEC_E_OK)
{
SecPkgContext_KeyInfoW *info = buffer;
info->KeySize = conn_info.dwCipherStrength;
info->SignatureAlgorithm = schan_funcs->get_key_signature_algorithm(ctx->session);
info->EncryptAlgorithm = conn_info.aiCipher;
info->sSignatureAlgorithmName = get_alg_name(info->SignatureAlgorithm, TRUE);
info->sEncryptAlgorithmName = get_alg_name(info->EncryptAlgorithm, TRUE);
}
return status;
}
case SECPKG_ATTR_REMOTE_CERT_CONTEXT:
{
PCCERT_CONTEXT *cert = buffer;
status = ensure_remote_cert(ctx);
if(status != SEC_E_OK)
return status;
*cert = CertDuplicateCertificateContext(ctx->cert);
return SEC_E_OK;
}
case SECPKG_ATTR_CONNECTION_INFO:
{
SecPkgContext_ConnectionInfo *info = buffer;
return schan_funcs->get_connection_info(ctx->session, info);
}
case SECPKG_ATTR_ENDPOINT_BINDINGS:
{
SecPkgContext_Bindings *bindings = buffer;
CCRYPT_OID_INFO *info;
ALG_ID hash_alg = CALG_SHA_256;
BYTE hash[1024];
DWORD hash_size;
char *p;
BOOL r;
static const char prefix[] = "tls-server-end-point:";
status = ensure_remote_cert(ctx);
if(status != SEC_E_OK)
return status;
/* RFC 5929 */
info = CryptFindOIDInfo(CRYPT_OID_INFO_OID_KEY, ctx->cert->pCertInfo->SignatureAlgorithm.pszObjId, 0);
if(info && info->u.Algid != CALG_SHA1 && info->u.Algid != CALG_MD5)
hash_alg = info->u.Algid;
hash_size = sizeof(hash);
r = CryptHashCertificate(0, hash_alg, 0, ctx->cert->pbCertEncoded, ctx->cert->cbCertEncoded, hash, &hash_size);
if(!r)
return GetLastError();
bindings->BindingsLength = sizeof(*bindings->Bindings) + sizeof(prefix)-1 + hash_size;
/* freed with FreeContextBuffer */
bindings->Bindings = RtlAllocateHeap(GetProcessHeap(), HEAP_ZERO_MEMORY, bindings->BindingsLength);
if(!bindings->Bindings)
return SEC_E_INSUFFICIENT_MEMORY;
bindings->Bindings->cbApplicationDataLength = sizeof(prefix)-1 + hash_size;
bindings->Bindings->dwApplicationDataOffset = sizeof(*bindings->Bindings);
p = (char*)(bindings->Bindings+1);
memcpy(p, prefix, sizeof(prefix)-1);
p += sizeof(prefix)-1;
memcpy(p, hash, hash_size);
return SEC_E_OK;
}
case SECPKG_ATTR_UNIQUE_BINDINGS:
{
SecPkgContext_Bindings *bindings = buffer;
return schan_funcs->get_unique_channel_binding(ctx->session, bindings);
}
case SECPKG_ATTR_APPLICATION_PROTOCOL:
{
SecPkgContext_ApplicationProtocol *protocol = buffer;
return schan_funcs->get_application_protocol(ctx->session, protocol);
}
default:
FIXME("Unhandled attribute %#x\n", attribute);
return SEC_E_UNSUPPORTED_FUNCTION;
}
}
static SECURITY_STATUS SEC_ENTRY schan_QueryContextAttributesA(
PCtxtHandle context_handle, ULONG attribute, PVOID buffer)
{
TRACE("context_handle %p, attribute %#x, buffer %p\n",
context_handle, attribute, buffer);
switch(attribute)
{
case SECPKG_ATTR_STREAM_SIZES:
return schan_QueryContextAttributesW(context_handle, attribute, buffer);
case SECPKG_ATTR_KEY_INFO:
{
SECURITY_STATUS status = schan_QueryContextAttributesW(context_handle, attribute, buffer);
if (status == SEC_E_OK)
{
SecPkgContext_KeyInfoA *info = buffer;
info->sSignatureAlgorithmName = get_alg_name(info->SignatureAlgorithm, FALSE);
info->sEncryptAlgorithmName = get_alg_name(info->EncryptAlgorithm, FALSE);
}
return status;
}
case SECPKG_ATTR_REMOTE_CERT_CONTEXT:
return schan_QueryContextAttributesW(context_handle, attribute, buffer);
case SECPKG_ATTR_CONNECTION_INFO:
return schan_QueryContextAttributesW(context_handle, attribute, buffer);
case SECPKG_ATTR_ENDPOINT_BINDINGS:
return schan_QueryContextAttributesW(context_handle, attribute, buffer);
case SECPKG_ATTR_UNIQUE_BINDINGS:
return schan_QueryContextAttributesW(context_handle, attribute, buffer);
case SECPKG_ATTR_APPLICATION_PROTOCOL:
return schan_QueryContextAttributesW(context_handle, attribute, buffer);
default:
FIXME("Unhandled attribute %#x\n", attribute);
return SEC_E_UNSUPPORTED_FUNCTION;
}
}
static int schan_encrypt_message_get_next_buffer(const struct schan_transport *t, struct schan_buffers *s)
{
SecBuffer *b;
if (s->current_buffer_idx == -1)
return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_STREAM_HEADER);
b = &s->desc->pBuffers[s->current_buffer_idx];
if (b->BufferType == SECBUFFER_STREAM_HEADER)
return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_DATA);
if (b->BufferType == SECBUFFER_DATA)
return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_STREAM_TRAILER);
return -1;
}
static int schan_encrypt_message_get_next_buffer_token(const struct schan_transport *t, struct schan_buffers *s)
{
SecBuffer *b;
if (s->current_buffer_idx == -1)
return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_TOKEN);
b = &s->desc->pBuffers[s->current_buffer_idx];
if (b->BufferType == SECBUFFER_TOKEN)
{
int idx = schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_TOKEN);
if (idx != s->current_buffer_idx) return -1;
return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_DATA);
}
if (b->BufferType == SECBUFFER_DATA)
{
int idx = schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_TOKEN);
if (idx != -1)
idx = schan_find_sec_buffer_idx(s->desc, idx + 1, SECBUFFER_TOKEN);
return idx;
}
return -1;
}
static SECURITY_STATUS SEC_ENTRY schan_EncryptMessage(PCtxtHandle context_handle,
ULONG quality, PSecBufferDesc message, ULONG message_seq_no)
{
struct schan_context *ctx;
struct schan_buffers *b;
SECURITY_STATUS status;
SecBuffer *buffer;
SIZE_T data_size;
SIZE_T length;
char *data;
int idx;
TRACE("context_handle %p, quality %d, message %p, message_seq_no %d\n",
context_handle, quality, message, message_seq_no);
if (!context_handle) return SEC_E_INVALID_HANDLE;
ctx = schan_get_object(context_handle->dwLower, SCHAN_HANDLE_CTX);
dump_buffer_desc(message);
idx = schan_find_sec_buffer_idx(message, 0, SECBUFFER_DATA);
if (idx == -1)
{
WARN("No data buffer passed\n");
return SEC_E_INTERNAL_ERROR;
}
buffer = &message->pBuffers[idx];
data_size = buffer->cbBuffer;
data = malloc(data_size);
memcpy(data, buffer->pvBuffer, data_size);
if (schan_find_sec_buffer_idx(message, 0, SECBUFFER_STREAM_HEADER) != -1)
init_schan_buffers(&ctx->transport.out, message, schan_encrypt_message_get_next_buffer);
else
init_schan_buffers(&ctx->transport.out, message, schan_encrypt_message_get_next_buffer_token);
length = data_size;
status = schan_funcs->send(ctx->session, data, &length);
TRACE("Sent %ld bytes.\n", length);
if (length != data_size)
status = SEC_E_INTERNAL_ERROR;
b = &ctx->transport.out;
b->desc->pBuffers[b->current_buffer_idx].cbBuffer = b->offset;
free(data);
TRACE("Returning %#x.\n", status);
return status;
}
static int schan_decrypt_message_get_next_buffer(const struct schan_transport *t, struct schan_buffers *s)
{
if (s->current_buffer_idx == -1)
return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_DATA);
return -1;
}
static int schan_validate_decrypt_buffer_desc(PSecBufferDesc message)
{
int data_idx = -1;
unsigned int empty_count = 0;
unsigned int i;
if (message->cBuffers < 4)
{
WARN("Less than four buffers passed\n");
return -1;
}
for (i = 0; i < message->cBuffers; ++i)
{
SecBuffer *b = &message->pBuffers[i];
if (b->BufferType == SECBUFFER_DATA)
{
if (data_idx != -1)
{
WARN("More than one data buffer passed\n");
return -1;
}
data_idx = i;
}
else if (b->BufferType == SECBUFFER_EMPTY)
++empty_count;
}
if (data_idx == -1)
{
WARN("No data buffer passed\n");
return -1;
}
if (empty_count < 3)
{
WARN("Less than three empty buffers passed\n");
return -1;
}
return data_idx;
}
static void schan_decrypt_fill_buffer(PSecBufferDesc message, ULONG buffer_type, void *data, ULONG size)
{
int idx;
SecBuffer *buffer;
idx = schan_find_sec_buffer_idx(message, 0, SECBUFFER_EMPTY);
buffer = &message->pBuffers[idx];
buffer->BufferType = buffer_type;
buffer->pvBuffer = data;
buffer->cbBuffer = size;
}
static SECURITY_STATUS SEC_ENTRY schan_DecryptMessage(PCtxtHandle context_handle,
PSecBufferDesc message, ULONG message_seq_no, PULONG quality)
{
SECURITY_STATUS status = SEC_E_OK;
struct schan_context *ctx;
SecBuffer *buffer;
SIZE_T data_size;
char *data;
unsigned expected_size;
SSIZE_T received = 0;
int idx;
unsigned char *buf_ptr;
TRACE("context_handle %p, message %p, message_seq_no %d, quality %p\n",
context_handle, message, message_seq_no, quality);
if (!context_handle) return SEC_E_INVALID_HANDLE;
ctx = schan_get_object(context_handle->dwLower, SCHAN_HANDLE_CTX);
dump_buffer_desc(message);
idx = schan_validate_decrypt_buffer_desc(message);
if (idx == -1)
return SEC_E_INVALID_TOKEN;
buffer = &message->pBuffers[idx];
buf_ptr = buffer->pvBuffer;
expected_size = ctx->header_size + read_record_size(buf_ptr, ctx->header_size);
if(buffer->cbBuffer < expected_size)
{
TRACE("Expected %u bytes, but buffer only contains %u bytes\n", expected_size, buffer->cbBuffer);
buffer->BufferType = SECBUFFER_MISSING;
buffer->cbBuffer = expected_size - buffer->cbBuffer;
/* This is a bit weird, but windows does it too */
idx = schan_find_sec_buffer_idx(message, 0, SECBUFFER_EMPTY);
buffer = &message->pBuffers[idx];
buffer->BufferType = SECBUFFER_MISSING;
buffer->cbBuffer = expected_size - buffer->cbBuffer;
TRACE("Returning SEC_E_INCOMPLETE_MESSAGE\n");
return SEC_E_INCOMPLETE_MESSAGE;
}
data_size = expected_size - ctx->header_size;
data = malloc(data_size);
init_schan_buffers(&ctx->transport.in, message, schan_decrypt_message_get_next_buffer);
ctx->transport.in.limit = expected_size;
while (received < data_size)
{
SIZE_T length = data_size - received;
status = schan_funcs->recv(ctx->session, data + received, &length);
if (status == SEC_I_RENEGOTIATE)
break;
if (status == SEC_I_CONTINUE_NEEDED)
{
status = SEC_E_OK;
break;
}
if (status != SEC_E_OK)
{
free(data);
ERR("Returning %x\n", status);
return status;
}
if (!length)
break;
received += length;
}
TRACE("Received %ld bytes\n", received);
memcpy(buf_ptr + ctx->header_size, data, received);
free(data);
schan_decrypt_fill_buffer(message, SECBUFFER_DATA,
buf_ptr + ctx->header_size, received);
schan_decrypt_fill_buffer(message, SECBUFFER_STREAM_TRAILER,
buf_ptr + ctx->header_size + received, buffer->cbBuffer - ctx->header_size - received);
if(buffer->cbBuffer > expected_size)
schan_decrypt_fill_buffer(message, SECBUFFER_EXTRA,
buf_ptr + expected_size, buffer->cbBuffer - expected_size);
buffer->BufferType = SECBUFFER_STREAM_HEADER;
buffer->cbBuffer = ctx->header_size;
return status;
}
static SECURITY_STATUS SEC_ENTRY schan_DeleteSecurityContext(PCtxtHandle context_handle)
{
struct schan_context *ctx;
TRACE("context_handle %p\n", context_handle);
if (!context_handle) return SEC_E_INVALID_HANDLE;
ctx = schan_free_handle(context_handle->dwLower, SCHAN_HANDLE_CTX);
if (!ctx) return SEC_E_INVALID_HANDLE;
if (ctx->cert) CertFreeCertificateContext(ctx->cert);
schan_funcs->dispose_session(ctx->session);
free(ctx);
return SEC_E_OK;
}
static const SecurityFunctionTableA schanTableA = {
1,
NULL, /* EnumerateSecurityPackagesA */
schan_QueryCredentialsAttributesA,
schan_AcquireCredentialsHandleA,
schan_FreeCredentialsHandle,
NULL, /* Reserved2 */
schan_InitializeSecurityContextA,
NULL, /* AcceptSecurityContext */
NULL, /* CompleteAuthToken */
schan_DeleteSecurityContext,
NULL, /* ApplyControlToken */
schan_QueryContextAttributesA,
NULL, /* ImpersonateSecurityContext */
NULL, /* RevertSecurityContext */
NULL, /* MakeSignature */
NULL, /* VerifySignature */
FreeContextBuffer,
NULL, /* QuerySecurityPackageInfoA */
NULL, /* Reserved3 */
NULL, /* Reserved4 */
NULL, /* ExportSecurityContext */
NULL, /* ImportSecurityContextA */
NULL, /* AddCredentialsA */
NULL, /* Reserved8 */
NULL, /* QuerySecurityContextToken */
schan_EncryptMessage,
schan_DecryptMessage,
NULL, /* SetContextAttributesA */
};
static const SecurityFunctionTableW schanTableW = {
1,
NULL, /* EnumerateSecurityPackagesW */
schan_QueryCredentialsAttributesW,
schan_AcquireCredentialsHandleW,
schan_FreeCredentialsHandle,
NULL, /* Reserved2 */
schan_InitializeSecurityContextW,
NULL, /* AcceptSecurityContext */
NULL, /* CompleteAuthToken */
schan_DeleteSecurityContext,
NULL, /* ApplyControlToken */
schan_QueryContextAttributesW,
NULL, /* ImpersonateSecurityContext */
NULL, /* RevertSecurityContext */
NULL, /* MakeSignature */
NULL, /* VerifySignature */
FreeContextBuffer,
NULL, /* QuerySecurityPackageInfoW */
NULL, /* Reserved3 */
NULL, /* Reserved4 */
NULL, /* ExportSecurityContext */
NULL, /* ImportSecurityContextW */
NULL, /* AddCredentialsW */
NULL, /* Reserved8 */
NULL, /* QuerySecurityContextToken */
schan_EncryptMessage,
schan_DecryptMessage,
NULL, /* SetContextAttributesW */
};
const struct schan_callbacks schan_callbacks =
{
schan_get_buffer,
schan_get_session_for_transport,
schan_pull,
schan_push,
};
void SECUR32_initSchannelSP(void)
{
/* This is what Windows reports. This shouldn't break any applications
* even though the functions are missing, because the wrapper will
* return SEC_E_UNSUPPORTED_FUNCTION if our function is NULL.
*/
static const LONG caps =
SECPKG_FLAG_INTEGRITY |
SECPKG_FLAG_PRIVACY |
SECPKG_FLAG_CONNECTION |
SECPKG_FLAG_MULTI_REQUIRED |
SECPKG_FLAG_EXTENDED_ERROR |
SECPKG_FLAG_IMPERSONATION |
SECPKG_FLAG_ACCEPT_WIN32_NAME |
SECPKG_FLAG_STREAM;
static const short version = 1;
static const LONG maxToken = 16384;
SEC_WCHAR *uniSPName = (SEC_WCHAR *)UNISP_NAME_W,
*schannel = (SEC_WCHAR *)SCHANNEL_NAME_W;
const SecPkgInfoW info[] = {
{ caps, version, UNISP_RPC_ID, maxToken, uniSPName, uniSPName },
{ caps, version, UNISP_RPC_ID, maxToken, schannel, (SEC_WCHAR *)L"Schannel Security Package" },
};
SecureProvider *provider;
if (!schan_funcs && __wine_init_unix_lib(hsecur32, DLL_PROCESS_ATTACH, &schan_callbacks, &schan_funcs))
{
ERR( "no schannel support, expect problems\n" );
return;
}
schan_handle_table = malloc(64 * sizeof(*schan_handle_table));
if (!schan_handle_table)
{
ERR("Failed to allocate schannel handle table.\n");
goto fail;
}
schan_handle_table_size = 64;
provider = SECUR32_addProvider(&schanTableA, &schanTableW, L"schannel.dll");
if (!provider)
{
ERR("Failed to add schannel provider.\n");
goto fail;
}
SECUR32_addPackages(provider, ARRAY_SIZE(info), NULL, info);
return;
fail:
free(schan_handle_table);
schan_handle_table = NULL;
return;
}
void SECUR32_deinitSchannelSP(void)
{
SIZE_T i = schan_handle_count;
if (!schan_handle_table) return;
/* deinitialized sessions first because a pointer to the credentials
* may be stored for the session. */
while (i--)
{
if (schan_handle_table[i].type == SCHAN_HANDLE_CTX)
{
struct schan_context *ctx = schan_free_handle(i, SCHAN_HANDLE_CTX);
schan_funcs->dispose_session(ctx->session);
free(ctx);
}
}
i = schan_handle_count;
while (i--)
{
if (schan_handle_table[i].type != SCHAN_HANDLE_FREE)
{
struct schan_credentials *cred;
cred = schan_free_handle(i, SCHAN_HANDLE_CRED);
schan_funcs->free_certificate_credentials(cred);
free(cred);
}
}
free(schan_handle_table);
__wine_init_unix_lib(hsecur32, DLL_PROCESS_DETACH, NULL, NULL);
schan_funcs = NULL;
}
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