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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_HTTP_HTTP_AUTH_HANDLER_NTLM_H_
#define NET_HTTP_HTTP_AUTH_HANDLER_NTLM_H_
#include <stddef.h>
#include <stdint.h>
#include "build/build_config.h"
// This contains the portable and the SSPI implementations for NTLM.
// We use NTLM_SSPI for Windows, and NTLM_PORTABLE for other platforms.
#if defined(OS_WIN)
#define NTLM_SSPI
#else
#define NTLM_PORTABLE
#endif
#if defined(NTLM_SSPI)
#define SECURITY_WIN32 1
#include <windows.h>
#include <security.h>
#include "net/http/http_auth_sspi_win.h"
#elif defined(NTLM_PORTABLE)
#include "net/ntlm/ntlm_client.h"
#endif
#include <string>
#include <vector>
#include "base/containers/span.h"
#include "base/strings/string16.h"
#include "net/base/completion_once_callback.h"
#include "net/base/net_export.h"
#include "net/http/http_auth_handler.h"
#include "net/http/http_auth_handler_factory.h"
namespace net {
class HttpAuthPreferences;
// Code for handling HTTP NTLM authentication.
class NET_EXPORT_PRIVATE HttpAuthHandlerNTLM : public HttpAuthHandler {
public:
class Factory : public HttpAuthHandlerFactory {
public:
Factory();
~Factory() override;
int CreateAuthHandler(HttpAuthChallengeTokenizer* challenge,
HttpAuth::Target target,
const SSLInfo& ssl_info,
const GURL& origin,
CreateReason reason,
int digest_nonce_count,
const NetLogWithSource& net_log,
std::unique_ptr<HttpAuthHandler>* handler) override;
#if defined(NTLM_SSPI)
// Set the SSPILibrary to use. Typically the only callers which need to use
// this are unit tests which pass in a mocked-out version of the SSPI
// library. After the call |sspi_library| will be owned by this Factory and
// will be destroyed when the Factory is destroyed.
void set_sspi_library(SSPILibrary* sspi_library) {
sspi_library_.reset(sspi_library);
}
#endif // defined(NTLM_SSPI)
private:
#if defined(NTLM_SSPI)
ULONG max_token_length_;
bool is_unsupported_;
std::unique_ptr<SSPILibrary> sspi_library_;
#endif // defined(NTLM_SSPI)
};
#if defined(NTLM_PORTABLE)
// A function that returns the time as the number of 100 nanosecond ticks
// since Jan 1, 1601 (UTC).
typedef uint64_t (*GetMSTimeProc)();
// A function that generates n random bytes in the output buffer.
typedef void (*GenerateRandomProc)(uint8_t* output, size_t n);
// A function that returns the local host name. Returns an empty string if
// the local host name is not available.
typedef std::string (*HostNameProc)();
// For unit tests to override and restore the GenerateRandom and
// GetHostName functions.
class ScopedProcSetter {
public:
ScopedProcSetter(GetMSTimeProc ms_time_proc,
GenerateRandomProc random_proc,
HostNameProc host_name_proc) {
old_ms_time_proc_ = SetGetMSTimeProc(ms_time_proc);
old_random_proc_ = SetGenerateRandomProc(random_proc);
old_host_name_proc_ = SetHostNameProc(host_name_proc);
}
~ScopedProcSetter() {
SetGetMSTimeProc(old_ms_time_proc_);
SetGenerateRandomProc(old_random_proc_);
SetHostNameProc(old_host_name_proc_);
}
private:
GetMSTimeProc old_ms_time_proc_;
GenerateRandomProc old_random_proc_;
HostNameProc old_host_name_proc_;
};
#endif
#if defined(NTLM_PORTABLE)
explicit HttpAuthHandlerNTLM(
const HttpAuthPreferences* http_auth_preferences);
#endif
#if defined(NTLM_SSPI)
HttpAuthHandlerNTLM(SSPILibrary* sspi_library,
ULONG max_token_length,
const HttpAuthPreferences* http_auth_preferences);
#endif
bool NeedsIdentity() override;
bool AllowsDefaultCredentials() override;
HttpAuth::AuthorizationResult HandleAnotherChallenge(
HttpAuthChallengeTokenizer* challenge) override;
protected:
// This function acquires a credentials handle in the SSPI implementation.
// It does nothing in the portable implementation.
int InitializeBeforeFirstChallenge();
bool Init(HttpAuthChallengeTokenizer* tok, const SSLInfo& ssl_info) override;
int GenerateAuthTokenImpl(const AuthCredentials* credentials,
const HttpRequestInfo* request,
CompletionOnceCallback callback,
std::string* auth_token) override;
private:
~HttpAuthHandlerNTLM() override;
#if defined(NTLM_PORTABLE)
// For unit tests to override the GetMSTime, GenerateRandom and GetHostName
// functions. Returns the old function.
static GetMSTimeProc SetGetMSTimeProc(GetMSTimeProc proc);
static GenerateRandomProc SetGenerateRandomProc(GenerateRandomProc proc);
static HostNameProc SetHostNameProc(HostNameProc proc);
// Given an input token received from the server, generate the next output
// token to be sent to the server.
std::vector<uint8_t> GetNextToken(base::span<const uint8_t> in_token);
#endif
// Parse the challenge, saving the results into this instance.
HttpAuth::AuthorizationResult ParseChallenge(
HttpAuthChallengeTokenizer* tok, bool initial_challenge);
// Create an NTLM SPN to identify the |origin| server.
static std::string CreateSPN(const GURL& origin);
#if defined(NTLM_SSPI)
HttpAuthSSPI auth_sspi_;
#elif defined(NTLM_PORTABLE)
ntlm::NtlmClient ntlm_client_;
#endif
#if defined(NTLM_PORTABLE)
static GetMSTimeProc get_ms_time_proc_;
static GenerateRandomProc generate_random_proc_;
static HostNameProc get_host_name_proc_;
#endif
base::string16 domain_;
AuthCredentials credentials_;
std::string channel_bindings_;
// The base64-encoded string following "NTLM" in the "WWW-Authenticate" or
// "Proxy-Authenticate" response header.
std::string auth_data_;
#if defined(NTLM_SSPI)
const HttpAuthPreferences* http_auth_preferences_;
#endif
};
} // namespace net
#endif // NET_HTTP_HTTP_AUTH_HANDLER_NTLM_H_
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