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