FreeRDP/libfreerdp/core/gateway/ncacn_http.c
2018-01-15 13:22:01 +01:00

232 lines
5.8 KiB
C

/**
* FreeRDP: A Remote Desktop Protocol Implementation
* RPC over HTTP (ncacn_http)
*
* Copyright 2012 Marc-Andre Moreau <marcandre.moreau@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ncacn_http.h"
#include <winpr/crt.h>
#include <winpr/tchar.h>
#include <winpr/stream.h>
#include <winpr/dsparse.h>
#include <winpr/winhttp.h>
#define TAG FREERDP_TAG("core.gateway.ntlm")
static wStream* rpc_ntlm_http_request(rdpRpc* rpc, HttpContext* http, const char* method,
int contentLength, SecBuffer* ntlmToken)
{
wStream* s;
HttpRequest* request;
char* base64NtlmToken = NULL;
request = http_request_new();
if (ntlmToken)
base64NtlmToken = crypto_base64_encode(ntlmToken->pvBuffer, ntlmToken->cbBuffer);
http_request_set_method(request, method);
request->ContentLength = contentLength;
http_request_set_uri(request, http->URI);
if (base64NtlmToken)
{
http_request_set_auth_scheme(request, "NTLM");
http_request_set_auth_param(request, base64NtlmToken);
}
s = http_request_write(http, request);
http_request_free(request);
free(base64NtlmToken);
return s;
}
int rpc_ncacn_http_send_in_channel_request(rdpRpc* rpc, RpcInChannel* inChannel)
{
wStream* s;
int status;
int contentLength;
BOOL continueNeeded;
rdpNtlm* ntlm = inChannel->ntlm;
HttpContext* http = inChannel->http;
continueNeeded = ntlm_authenticate(ntlm);
contentLength = (continueNeeded) ? 0 : 0x40000000;
s = rpc_ntlm_http_request(rpc, http, "RPC_IN_DATA", contentLength, &ntlm->outputBuffer[0]);
if (!s)
return -1;
status = rpc_in_channel_write(inChannel, Stream_Buffer(s), Stream_Length(s));
Stream_Free(s, TRUE);
return (status > 0) ? 1 : -1;
}
int rpc_ncacn_http_recv_in_channel_response(rdpRpc* rpc, RpcInChannel* inChannel,
HttpResponse* response)
{
char* token64 = NULL;
int ntlmTokenLength = 0;
BYTE* ntlmTokenData = NULL;
rdpNtlm* ntlm = inChannel->ntlm;
if (ListDictionary_Contains(response->Authenticates, "NTLM"))
{
token64 = ListDictionary_GetItemValue(response->Authenticates, "NTLM");
if (!token64)
return -1;
crypto_base64_decode(token64, strlen(token64), &ntlmTokenData, &ntlmTokenLength);
}
if (ntlmTokenData && ntlmTokenLength)
{
ntlm->inputBuffer[0].pvBuffer = ntlmTokenData;
ntlm->inputBuffer[0].cbBuffer = ntlmTokenLength;
}
return 1;
}
int rpc_ncacn_http_ntlm_init(rdpRpc* rpc, RpcChannel* channel)
{
rdpTls* tls = channel->tls;
rdpNtlm* ntlm = channel->ntlm;
rdpContext* context = rpc->context;
rdpSettings* settings = rpc->settings;
freerdp* instance = context->instance;
if (!settings->GatewayPassword || !settings->GatewayUsername ||
!strlen(settings->GatewayPassword) || !strlen(settings->GatewayUsername))
{
if (instance->GatewayAuthenticate)
{
BOOL proceed = instance->GatewayAuthenticate(instance, &settings->GatewayUsername,
&settings->GatewayPassword, &settings->GatewayDomain);
if (!proceed)
{
freerdp_set_last_error(context, FREERDP_ERROR_CONNECT_CANCELLED);
return 0;
}
if (settings->GatewayUseSameCredentials)
{
if (settings->GatewayUsername)
{
free(settings->Username);
if (!(settings->Username = _strdup(settings->GatewayUsername)))
return -1;
}
if (settings->GatewayDomain)
{
free(settings->Domain);
if (!(settings->Domain = _strdup(settings->GatewayDomain)))
return -1;
}
if (settings->GatewayPassword)
{
free(settings->Password);
if (!(settings->Password = _strdup(settings->GatewayPassword)))
return -1;
}
}
}
}
if (!ntlm_client_init(ntlm, TRUE, settings->GatewayUsername,
settings->GatewayDomain, settings->GatewayPassword, tls->Bindings))
{
return 0;
}
if (!ntlm_client_make_spn(ntlm, _T("HTTP"), settings->GatewayHostname))
{
return 0;
}
return 1;
}
void rpc_ncacn_http_ntlm_uninit(rdpRpc* rpc, RpcChannel* channel)
{
ntlm_client_uninit(channel->ntlm);
ntlm_free(channel->ntlm);
channel->ntlm = NULL;
}
int rpc_ncacn_http_send_out_channel_request(rdpRpc* rpc, RpcOutChannel* outChannel,
BOOL replacement)
{
wStream* s;
int status;
int contentLength;
BOOL continueNeeded;
rdpNtlm* ntlm = outChannel->ntlm;
HttpContext* http = outChannel->http;
continueNeeded = ntlm_authenticate(ntlm);
if (!replacement)
contentLength = (continueNeeded) ? 0 : 76;
else
contentLength = (continueNeeded) ? 0 : 120;
s = rpc_ntlm_http_request(rpc, http, "RPC_OUT_DATA", contentLength, &ntlm->outputBuffer[0]);
if (!s)
return -1;
status = rpc_out_channel_write(outChannel, Stream_Buffer(s), Stream_Length(s));
Stream_Free(s, TRUE);
return (status > 0) ? 1 : -1;
}
int rpc_ncacn_http_recv_out_channel_response(rdpRpc* rpc, RpcOutChannel* outChannel,
HttpResponse* response)
{
char* token64 = NULL;
int ntlmTokenLength = 0;
BYTE* ntlmTokenData = NULL;
rdpNtlm* ntlm = outChannel->ntlm;
if (ListDictionary_Contains(response->Authenticates, "NTLM"))
{
token64 = ListDictionary_GetItemValue(response->Authenticates, "NTLM");
if (!token64)
return -1;
crypto_base64_decode(token64, strlen(token64), &ntlmTokenData, &ntlmTokenLength);
}
if (ntlmTokenData && ntlmTokenLength)
{
ntlm->inputBuffer[0].pvBuffer = ntlmTokenData;
ntlm->inputBuffer[0].cbBuffer = ntlmTokenLength;
}
return 1;
}