我目前正在使用 Microsoft HTTP Server API 版本 2.0 实现一个小型 HTTP 服务器(http://msdn.microsoft.com/en-us/library/windows/desktop/aa364510(v=vs.85).aspx)。我需要在服务器端启用 HTTPS,并要求客户端证书验证。即使客户端请求到来,我需要能够进行双向认证(服务端认证客户端,客户端认证服务端),并且它们应该通过 SSL 进行通信。
目前为止,我已经成功启用了服务器端的 SSL,因此可以通过安全连接访问 {https://127.0.0.1:9999/hello} 网站,向服务器发出请求并接收响应,但我还无法打开需要客户端证书验证的功能(并验证它)。
在我的应用程序代码中,我表示我正在监听“{https://127.0.0.1:9999/hello}”URL(这是我添加到 URL 组的 URL),然后我使用 netsh.exe 工具将 9999 端口绑定到 SSL:
C:\>netsh http add sslcert ipport=0.0.0.0:9999 certhash=e515b6512e92f4663252eac72c28a784f2d78c6 appid={2C565242-B238-11D3-442D-0008C779D776} clientcertnegotiation=enable
我不确定这个"clientcertnegotiation=enable"应该做什么,文档说它应该"打开证书协商"。所以现在我在我的HTTP服务器代码中添加了一个额外的函数调用:
DWORD answer = 0;
HTTP_SSL_CLIENT_CERT_INFO sslClientCertInfo;
ULONG bytesReceived;
answer = HttpReceiveClientCertificate(hReqQueue, pRequest->ConnectionId, 0,
&sslClientCertInfo, sizeof( HTTP_SSL_CLIENT_CERT_INFO ), &bytesReceived, NULL );
我明白现在应该提示客户端使用证书,但这并没有起作用(我可能做错了什么,这就是我写下问题的原因)。“answer”的值为1168(ERROR_NOT_FOUND)。我正在使用Firefox浏览器作为客户端,并在其中添加了一张证书:工具->选项->查看证书->导入,因此Firefox可能应该使用那张证书或者提示一些证书,但我怀疑Firefox根本没有收到服务器请求客户端证书的请求。
无论如何,在哪个时候HTTP服务器都应该要求客户端证书呢?我认为它应该在收到请求后立即进行。为了演示我正在做什么,我正在使用Microsoft的HTTP Server示例应用程序代码(http://msdn.microsoft.com/en-us/library/windows/desktop/aa364640(v=vs.85).aspx),稍作修改:
#include "precomp.h"
#include <iostream>
//
// Macros.
//
#define INITIALIZE_HTTP_RESPONSE( resp, status, reason ) \
do \
{ \
RtlZeroMemory( (resp), sizeof(*(resp)) ); \
(resp)->StatusCode = (status); \
(resp)->pReason = (reason); \
(resp)->ReasonLength = (USHORT) strlen(reason); \
} while (FALSE)
#define ADD_KNOWN_HEADER(Response, HeaderId, RawValue) \
do \
{ \
(Response).Headers.KnownHeaders[(HeaderId)].pRawValue = \
(RawValue);\
(Response).Headers.KnownHeaders[(HeaderId)].RawValueLength = \
(USHORT) strlen(RawValue); \
} while(FALSE)
#define ALLOC_MEM(cb) HeapAlloc(GetProcessHeap(), 0, (cb))
#define FREE_MEM(ptr) HeapFree(GetProcessHeap(), 0, (ptr))
//
// Prototypes.
//
DWORD DoReceiveRequests(HANDLE hReqQueue);
DWORD SendHttpResponse(HANDLE hReqQueue, PHTTP_REQUEST pRequest, USHORT StatusCode, PSTR pReason, PSTR pEntity);
DWORD SendHttpPostResponse(HANDLE hReqQueue, PHTTP_REQUEST pRequest);
/*******************************************************************++
Routine Description:
main routine
Arguments:
argc - # of command line arguments.
argv - Arguments.
Return Value:
Success/Failure
--*******************************************************************/
int __cdecl wmain(int argc, wchar_t * argv[])
{
ULONG retCode;
HANDLE hReqQueue = NULL; //request queue handle
int UrlAdded = 0;
HTTPAPI_VERSION HttpApiVersion = HTTPAPI_VERSION_2;
retCode = HttpInitialize(
HttpApiVersion,
HTTP_INITIALIZE_SERVER ,
NULL
);
if (retCode == NO_ERROR)
{
// If intialize succeeded, create server session
HTTP_SERVER_SESSION_ID serverSessionId = NULL;
retCode = HttpCreateServerSession(HttpApiVersion, &serverSessionId, 0);
if (retCode == NO_ERROR)
{
// server session creation succeeded
//create request queue
retCode = HttpCreateRequestQueue(HttpApiVersion, NULL, NULL, 0, &hReqQueue);
if (retCode == NO_ERROR)
{
//create the URL group
HTTP_URL_GROUP_ID urlGroupId = NULL;
retCode = HttpCreateUrlGroup(serverSessionId, &urlGroupId, 0);
if (retCode == NO_ERROR)
{
retCode = HttpAddUrlToUrlGroup(urlGroupId, L"https://127.0.0.1:9999/hello", 0, 0);
if (retCode == NO_ERROR)
{
//Set url group properties
//First let's set the binding property:
HTTP_BINDING_INFO bindingInfo;
bindingInfo.RequestQueueHandle = hReqQueue;
HTTP_PROPERTY_FLAGS propertyFlags;
propertyFlags.Present = 1;
bindingInfo.Flags = propertyFlags;
retCode = HttpSetUrlGroupProperty(
urlGroupId,
HttpServerBindingProperty,
&bindingInfo,
sizeof( HTTP_BINDING_INFO ));
DoReceiveRequests(hReqQueue);
}
HttpCloseUrlGroup(urlGroupId);
}//if HttpCreateUrlGroup succeeded
HttpCloseRequestQueue(hReqQueue);
}//if HttpCreateRequestQueue succeeded
HttpCloseServerSession(serverSessionId);
} // if HttpCreateServerSession succeeded
HttpTerminate(HTTP_INITIALIZE_SERVER, NULL);
}// if httpInialize succeeded
return retCode;
}//main
/*******************************************************************++
Routine Description:
The function to receive a request. This function calls the
corresponding function to handle the response.
Arguments:
hReqQueue - Handle to the request queue
Return Value:
Success/Failure.
--*******************************************************************/
DWORD DoReceiveRequests(IN HANDLE hReqQueue)
{
ULONG result;
HTTP_REQUEST_ID requestId;
DWORD bytesRead;
PHTTP_REQUEST pRequest;
PCHAR pRequestBuffer;
ULONG RequestBufferLength;
//
// Allocate a 2 KB buffer. This size should work for most
// requests. The buffer size can be increased if required. Space
// is also required for an HTTP_REQUEST structure.
//
RequestBufferLength = sizeof(HTTP_REQUEST) + 2048;
pRequestBuffer = (PCHAR) ALLOC_MEM( RequestBufferLength );
if (pRequestBuffer == NULL)
{
return ERROR_NOT_ENOUGH_MEMORY;
}
pRequest = (PHTTP_REQUEST)pRequestBuffer;
//
// Wait for a new request. This is indicated by a NULL
// request ID.
//
HTTP_SET_NULL_ID( &requestId );
for(;;)
{
RtlZeroMemory(pRequest, RequestBufferLength);
result = HttpReceiveHttpRequest(
hReqQueue, // Req Queue
requestId, // Req ID
0, // Flags
pRequest, // HTTP request buffer
RequestBufferLength,// req buffer length
&bytesRead, // bytes received
NULL // LPOVERLAPPED
);
if(NO_ERROR == result)
{
DWORD answer = 0;
HTTP_SSL_CLIENT_CERT_INFO sslClientCertInfo;
ULONG bytesReceived;
answer = HttpReceiveClientCertificate(hReqQueue, pRequest->ConnectionId, 0,
&sslClientCertInfo, sizeof( HTTP_SSL_CLIENT_CERT_INFO ), &bytesReceived, NULL );
if (answer != NO_ERROR)
{
result = SendHttpResponse(hReqQueue, pRequest, 401, "Unauthorized request", "Unauthorized request");
}
else
{
result = SendHttpResponse(hReqQueue, pRequest, 200, "OK", "OK");
}
if (result != NO_ERROR)
{
break; //if failed to send response, stop listening for further incoming requests
}
//
// Reset the Request ID to handle the next request.
//
HTTP_SET_NULL_ID( &requestId );
}
else
{
break;
}
}
if(pRequestBuffer)
{
FREE_MEM( pRequestBuffer );
}
return result;
}
/*******************************************************************++
Routine Description:
The routine sends a HTTP response
Arguments:
hReqQueue - Handle to the request queue
pRequest - The parsed HTTP request
StatusCode - Response Status Code
pReason - Response reason phrase
pEntityString - Response entity body
Return Value:
Success/Failure.
--*******************************************************************/
DWORD SendHttpResponse(
IN HANDLE hReqQueue,
IN PHTTP_REQUEST pRequest,
IN USHORT StatusCode,
IN PSTR pReason,
IN PSTR pEntityString
)
{
HTTP_RESPONSE response;
HTTP_DATA_CHUNK dataChunk;
DWORD result;
DWORD bytesSent;
INITIALIZE_HTTP_RESPONSE(&response, StatusCode, pReason);
ADD_KNOWN_HEADER(response, HttpHeaderContentType, "text/html");
if(pEntityString)
{
//
// Add an entity chunk.
//
dataChunk.DataChunkType = HttpDataChunkFromMemory;
dataChunk.FromMemory.pBuffer = pEntityString;
dataChunk.FromMemory.BufferLength =
(ULONG) strlen(pEntityString);
response.EntityChunkCount = 1;
response.pEntityChunks = &dataChunk;
}
result = HttpSendHttpResponse(
hReqQueue, // ReqQueueHandle
pRequest->RequestId, // Request ID
0, // Flags
&response, // HTTP response
NULL, // pReserved1
&bytesSent, // bytes sent (OPTIONAL)
NULL, // pReserved2 (must be NULL)
0, // Reserved3 (must be 0)
NULL, // LPOVERLAPPED(OPTIONAL)
NULL // pReserved4 (must be NULL)
);
if(result != NO_ERROR)
{
wprintf(L"HttpSendHttpResponse failed with %lu \n", result);
}
return result;
}
我的问题是,我如何启用需要客户端证书的功能,以及一旦我收到证书后如何验证证书(当前示例代码仅尝试从客户端接收证书,验证部分缺失)?我在互联网上真的没有找到使用 Microsoft HTTP Server API 并要求客户端证书的示例。
提前谢谢大家。