FreeRDP/libfreerdp/core/gateway/ncacn_http.c
akallabeth b494a193db Refactored certificate API:
* Proper encapsulation
* known_hosts2 backend extended (storing PEM)
* New backend storing each host certificate in a file
2021-05-11 08:00:18 +02:00

281 lines
6.6 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(HttpContext* http, const char* method, int contentLength,
const SecBuffer* ntlmToken)
{
wStream* s = NULL;
HttpRequest* request = NULL;
char* base64NtlmToken = NULL;
const char* uri;
if (!http || !method || !ntlmToken)
goto fail;
request = http_request_new();
if (!request)
goto fail;
if (ntlmToken)
base64NtlmToken = crypto_base64_encode(ntlmToken->pvBuffer, ntlmToken->cbBuffer);
uri = http_context_get_uri(http);
if (!http_request_set_method(request, method) ||
!http_request_set_content_length(request, contentLength) ||
!http_request_set_uri(request, uri))
goto fail;
if (base64NtlmToken)
{
if (!http_request_set_auth_scheme(request, "NTLM") ||
!http_request_set_auth_param(request, base64NtlmToken))
goto fail;
}
s = http_request_write(http, request);
fail:
http_request_free(request);
free(base64NtlmToken);
return s;
}
BOOL rpc_ncacn_http_send_in_channel_request(RpcChannel* inChannel)
{
wStream* s;
int status;
int contentLength;
BOOL continueNeeded = FALSE;
rdpNtlm* ntlm;
HttpContext* http;
const SecBuffer* buffer;
if (!inChannel || !inChannel->ntlm || !inChannel->http)
return FALSE;
ntlm = inChannel->ntlm;
http = inChannel->http;
if (!ntlm_authenticate(ntlm, &continueNeeded))
return FALSE;
contentLength = (continueNeeded) ? 0 : 0x40000000;
buffer = ntlm_client_get_output_buffer(ntlm);
s = rpc_ntlm_http_request(http, "RPC_IN_DATA", contentLength, buffer);
if (!s)
return -1;
status = rpc_channel_write(inChannel, Stream_Buffer(s), Stream_Length(s));
Stream_Free(s, TRUE);
return (status > 0) ? 1 : -1;
}
BOOL rpc_ncacn_http_recv_in_channel_response(RpcChannel* inChannel, HttpResponse* response)
{
const char* token64 = NULL;
size_t ntlmTokenLength = 0;
BYTE* ntlmTokenData = NULL;
rdpNtlm* ntlm;
if (!inChannel || !response || !inChannel->ntlm)
return FALSE;
ntlm = inChannel->ntlm;
token64 = http_response_get_auth_token(response, "NTLM");
if (token64)
crypto_base64_decode(token64, strlen(token64), &ntlmTokenData, &ntlmTokenLength);
if (ntlmTokenData && ntlmTokenLength)
return ntlm_client_set_input_buffer(ntlm, FALSE, ntlmTokenData, ntlmTokenLength);
free(ntlmTokenData);
return TRUE;
}
BOOL rpc_ncacn_http_ntlm_init(rdpContext* context, RpcChannel* channel)
{
rdpTls* tls;
rdpNtlm* ntlm;
rdpSettings* settings;
freerdp* instance;
if (!context || !channel)
return FALSE;
tls = channel->tls;
ntlm = channel->ntlm;
settings = context->settings;
instance = context->instance;
if (!tls || !ntlm || !instance || !settings)
return FALSE;
if (!settings->GatewayPassword || !settings->GatewayUsername ||
!strlen(settings->GatewayPassword) || !strlen(settings->GatewayUsername))
{
if (freerdp_shall_disconnect(instance))
return FALSE;
if (!instance->GatewayAuthenticate)
{
freerdp_set_last_error_log(context, FREERDP_ERROR_CONNECT_NO_OR_MISSING_CREDENTIALS);
return TRUE;
}
else
{
BOOL proceed =
instance->GatewayAuthenticate(instance, &settings->GatewayUsername,
&settings->GatewayPassword, &settings->GatewayDomain);
if (!proceed)
{
freerdp_set_last_error_log(context,
FREERDP_ERROR_CONNECT_NO_OR_MISSING_CREDENTIALS);
return TRUE;
}
if (settings->GatewayUseSameCredentials)
{
if (settings->GatewayUsername)
{
free(settings->Username);
if (!(settings->Username = _strdup(settings->GatewayUsername)))
return FALSE;
}
if (settings->GatewayDomain)
{
free(settings->Domain);
if (!(settings->Domain = _strdup(settings->GatewayDomain)))
return FALSE;
}
if (settings->GatewayPassword)
{
free(settings->Password);
if (!(settings->Password = _strdup(settings->GatewayPassword)))
return FALSE;
}
}
}
}
if (!ntlm_client_init(ntlm, TRUE, settings->GatewayUsername, settings->GatewayDomain,
settings->GatewayPassword, tls->Bindings))
{
return TRUE;
}
if (!ntlm_client_make_spn(ntlm, _T("HTTP"), settings->GatewayHostname))
{
return TRUE;
}
return TRUE;
}
void rpc_ncacn_http_ntlm_uninit(RpcChannel* channel)
{
if (!channel)
return;
ntlm_free(channel->ntlm);
channel->ntlm = NULL;
}
BOOL rpc_ncacn_http_send_out_channel_request(RpcChannel* outChannel, BOOL replacement)
{
BOOL rc = TRUE;
wStream* s;
int contentLength;
BOOL continueNeeded = FALSE;
rdpNtlm* ntlm;
HttpContext* http;
const SecBuffer* buffer;
if (!outChannel || !outChannel->ntlm || !outChannel->http)
return FALSE;
ntlm = outChannel->ntlm;
http = outChannel->http;
if (!ntlm_authenticate(ntlm, &continueNeeded))
return FALSE;
if (!replacement)
contentLength = (continueNeeded) ? 0 : 76;
else
contentLength = (continueNeeded) ? 0 : 120;
buffer = ntlm_client_get_output_buffer(ntlm);
s = rpc_ntlm_http_request(http, "RPC_OUT_DATA", contentLength, buffer);
if (!s)
return -1;
if (rpc_channel_write(outChannel, Stream_Buffer(s), Stream_Length(s)) < 0)
rc = FALSE;
Stream_Free(s, TRUE);
return rc;
}
BOOL rpc_ncacn_http_recv_out_channel_response(RpcChannel* outChannel, HttpResponse* response)
{
const char* token64 = NULL;
size_t ntlmTokenLength = 0;
BYTE* ntlmTokenData = NULL;
rdpNtlm* ntlm;
if (!outChannel || !response || !outChannel->ntlm)
return FALSE;
ntlm = outChannel->ntlm;
token64 = http_response_get_auth_token(response, "NTLM");
if (token64)
crypto_base64_decode(token64, strlen(token64), &ntlmTokenData, &ntlmTokenLength);
if (ntlmTokenData && ntlmTokenLength)
return ntlm_client_set_input_buffer(ntlm, FALSE, ntlmTokenData, ntlmTokenLength);
free(ntlmTokenData);
return TRUE;
}