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Support SOCKS proxy authentication

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This commit is contained in:
klzgrad 2021-04-19 22:34:08 +08:00
parent 469283036c
commit c2586d0dad
5 changed files with 185 additions and 37 deletions
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5
src/net/tools/naive/naive_proxy.cc
View File

@ -28,12 +28,16 @@ namespace net {
NaiveProxy::NaiveProxy(std::unique_ptr<ServerSocket> listen_socket,
ClientProtocol protocol,
const std::string& listen_user,
const std::string& listen_pass,
int concurrency,
RedirectResolver* resolver,
HttpNetworkSession* session,
const NetworkTrafficAnnotationTag& traffic_annotation)
: listen_socket_(std::move(listen_socket)),
protocol_(protocol),
listen_user_(listen_user),
listen_pass_(listen_pass),
concurrency_(concurrency),
resolver_(resolver),
session_(session),
@ -107,6 +111,7 @@ void NaiveProxy::DoConnect() {
if (protocol_ == ClientProtocol::kSocks5) {
socket = std::make_unique<Socks5ServerSocket>(std::move(accepted_socket_),
listen_user_, listen_pass_,
traffic_annotation_);
} else if (protocol_ == ClientProtocol::kHttp) {
socket = std::make_unique<HttpProxySocket>(std::move(accepted_socket_),

4
src/net/tools/naive/naive_proxy.h
View File

@ -33,6 +33,8 @@ class NaiveProxy {
public:
NaiveProxy(std::unique_ptr<ServerSocket> server_socket,
ClientProtocol protocol,
const std::string& listen_user,
const std::string& listen_pass,
int concurrency,
RedirectResolver* resolver,
HttpNetworkSession* session,
@ -60,6 +62,8 @@ class NaiveProxy {
std::unique_ptr<ServerSocket> listen_socket_;
ClientProtocol protocol_;
std::string listen_user_;
std::string listen_pass_;
int concurrency_;
ProxyInfo proxy_info_;
SSLConfig server_ssl_config_;

13
src/net/tools/naive/naive_proxy_bin.cc
View File

@ -18,6 +18,7 @@
#include "base/logging.h"
#include "base/rand_util.h"
#include "base/run_loop.h"
#include "base/strings/escape.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
@ -94,6 +95,8 @@ struct CommandLine {
struct Params {
net::ClientProtocol protocol;
std::string listen_user;
std::string listen_pass;
std::string listen_addr;
int listen_port;
int concurrency;
@ -230,7 +233,8 @@ bool ParseCommandLine(const CommandLine& cmdline, Params* params) {
params->protocol = net::ClientProtocol::kSocks5;
params->listen_addr = "0.0.0.0";
params->listen_port = 1080;
url::AddStandardScheme("socks", url::SCHEME_WITH_HOST_AND_PORT);
url::AddStandardScheme("socks",
url::SCHEME_WITH_HOST_PORT_AND_USER_INFORMATION);
url::AddStandardScheme("redir", url::SCHEME_WITH_HOST_AND_PORT);
if (!cmdline.listen.empty()) {
GURL url(cmdline.listen);
@ -252,6 +256,12 @@ bool ParseCommandLine(const CommandLine& cmdline, Params* params) {
std::cerr << "Invalid scheme in --listen" << std::endl;
return false;
}
if (!url.username().empty()) {
params->listen_user = base::UnescapeBinaryURLComponent(url.username());
}
if (!url.password().empty()) {
params->listen_pass = base::UnescapeBinaryURLComponent(url.password());
}
if (!url.host().empty()) {
params->listen_addr = url.host();
}
@ -567,6 +577,7 @@ int main(int argc, char* argv[]) {
}
net::NaiveProxy naive_proxy(std::move(listen_socket), params.protocol,
params.listen_user, params.listen_pass,
params.concurrency, resolver.get(), session,
kTrafficAnnotation);

179
src/net/tools/naive/socks5_server_socket.cc
View File

@ -28,11 +28,16 @@ enum SocksCommandType {
};
static constexpr unsigned int kGreetReadHeaderSize = 2;
static constexpr unsigned int kAuthReadHeaderSize = 2;
static constexpr unsigned int kReadHeaderSize = 5;
static constexpr char kSOCKS5Version = '\x05';
static constexpr char kSOCKS5Reserved = '\x00';
static constexpr char kAuthMethodNone = '\x00';
static constexpr char kAuthMethodUserPass = '\x02';
static constexpr char kAuthMethodNoAcceptable = '\xff';
static constexpr char kSubnegotiationVersion = '\x01';
static constexpr char kAuthStatusSuccess = '\x00';
static constexpr char kAuthStatusFailure = '\xff';
static constexpr char kReplySuccess = '\x00';
static constexpr char kReplyCommandNotSupported = '\x07';
@ -41,17 +46,18 @@ static_assert(sizeof(struct in6_addr) == 16, "incorrect system size of IPv6");
Socks5ServerSocket::Socks5ServerSocket(
std::unique_ptr<StreamSocket> transport_socket,
const std::string& user,
const std::string& pass,
const NetworkTrafficAnnotationTag& traffic_annotation)
: io_callback_(base::BindRepeating(&Socks5ServerSocket::OnIOComplete,
base::Unretained(this))),
transport_(std::move(transport_socket)),
next_state_(STATE_NONE),
completed_handshake_(false),
bytes_received_(0),
bytes_sent_(0),
greet_read_header_size_(kGreetReadHeaderSize),
read_header_size_(kReadHeaderSize),
was_ever_used_(false),
user_(user),
pass_(pass),
net_log_(transport_->NetLog()),
traffic_annotation_(traffic_annotation) {}
@ -252,6 +258,20 @@ int Socks5ServerSocket::DoLoop(int last_io_result) {
net_log_.EndEventWithNetErrorCode(NetLogEventType::SOCKS5_GREET_WRITE,
rv);
break;
case STATE_AUTH_READ:
DCHECK_EQ(OK, rv);
rv = DoAuthRead();
break;
case STATE_AUTH_READ_COMPLETE:
rv = DoAuthReadComplete(rv);
break;
case STATE_AUTH_WRITE:
DCHECK_EQ(OK, rv);
rv = DoAuthWrite();
break;
case STATE_AUTH_WRITE_COMPLETE:
rv = DoAuthWriteComplete(rv);
break;
case STATE_HANDSHAKE_READ:
DCHECK_EQ(OK, rv);
net_log_.BeginEvent(NetLogEventType::SOCKS5_HANDSHAKE_READ);
@ -285,11 +305,10 @@ int Socks5ServerSocket::DoGreetRead() {
next_state_ = STATE_GREET_READ_COMPLETE;
if (buffer_.empty()) {
DCHECK_EQ(0U, bytes_received_);
DCHECK_EQ(kGreetReadHeaderSize, greet_read_header_size_);
read_header_size_ = kGreetReadHeaderSize;
}
int handshake_buf_len = greet_read_header_size_ - bytes_received_;
int handshake_buf_len = read_header_size_ - buffer_.size();
DCHECK_LT(0, handshake_buf_len);
handshake_buf_ = base::MakeRefCounted<IOBuffer>(handshake_buf_len);
return transport_->Read(handshake_buf_.get(), handshake_buf_len,
@ -306,32 +325,37 @@ int Socks5ServerSocket::DoGreetReadComplete(int result) {
return ERR_SOCKS_CONNECTION_FAILED;
}
bytes_received_ += result;
buffer_.append(handshake_buf_->data(), result);
// When the first few bytes are read, check how many more are required
// and accordingly increase them
if (bytes_received_ == kGreetReadHeaderSize) {
if (buffer_.size() == kGreetReadHeaderSize) {
if (buffer_[0] != kSOCKS5Version) {
net_log_.AddEventWithIntParams(NetLogEventType::SOCKS_UNEXPECTED_VERSION,
"version", buffer_[0]);
return ERR_SOCKS_CONNECTION_FAILED;
}
if (buffer_[1] == 0) {
int nmethods = buffer_[1];
if (nmethods == 0) {
net_log_.AddEvent(NetLogEventType::SOCKS_NO_REQUESTED_AUTH);
return ERR_SOCKS_CONNECTION_FAILED;
}
greet_read_header_size_ += buffer_[1];
read_header_size_ += nmethods;
next_state_ = STATE_GREET_READ;
return OK;
}
if (bytes_received_ == greet_read_header_size_) {
void* match = std::memchr(&buffer_[kGreetReadHeaderSize], kAuthMethodNone,
greet_read_header_size_ - kGreetReadHeaderSize);
if (buffer_.size() == read_header_size_) {
int nmethods = buffer_[1];
char expected_method = kAuthMethodNone;
if (!user_.empty() || !pass_.empty()) {
expected_method = kAuthMethodUserPass;
}
void* match =
std::memchr(&buffer_[kGreetReadHeaderSize], expected_method, nmethods);
if (match) {
auth_method_ = kAuthMethodNone;
auth_method_ = expected_method;
} else {
auth_method_ = kAuthMethodNoAcceptable;
}
@ -368,9 +392,10 @@ int Socks5ServerSocket::DoGreetWriteComplete(int result) {
bytes_sent_ += result;
if (bytes_sent_ == buffer_.size()) {
buffer_.clear();
bytes_received_ = 0;
if (auth_method_ != kAuthMethodNoAcceptable) {
if (auth_method_ == kAuthMethodNone) {
next_state_ = STATE_HANDSHAKE_READ;
} else if (auth_method_ == kAuthMethodUserPass) {
next_state_ = STATE_AUTH_READ;
} else {
net_log_.AddEvent(NetLogEventType::SOCKS_NO_ACCEPTABLE_AUTH);
return ERR_SOCKS_CONNECTION_FAILED;
@ -381,15 +406,112 @@ int Socks5ServerSocket::DoGreetWriteComplete(int result) {
return OK;
}
int Socks5ServerSocket::DoAuthRead() {
next_state_ = STATE_AUTH_READ_COMPLETE;
if (buffer_.empty()) {
read_header_size_ = kAuthReadHeaderSize;
}
int handshake_buf_len = read_header_size_ - buffer_.size();
DCHECK_LT(0, handshake_buf_len);
handshake_buf_ = base::MakeRefCounted<IOBuffer>(handshake_buf_len);
return transport_->Read(handshake_buf_.get(), handshake_buf_len,
io_callback_);
}
int Socks5ServerSocket::DoAuthReadComplete(int result) {
if (result < 0)
return result;
if (result == 0) {
return ERR_SOCKS_CONNECTION_FAILED;
}
buffer_.append(handshake_buf_->data(), result);
// When the first few bytes are read, check how many more are required
// and accordingly increase them
if (buffer_.size() == kAuthReadHeaderSize) {
if (buffer_[0] != kSubnegotiationVersion) {
net_log_.AddEventWithIntParams(NetLogEventType::SOCKS_UNEXPECTED_VERSION,
"version", buffer_[0]);
return ERR_SOCKS_CONNECTION_FAILED;
}
int username_len = buffer_[1];
read_header_size_ += username_len + 1;
next_state_ = STATE_AUTH_READ;
return OK;
}
if (buffer_.size() == read_header_size_) {
int username_len = buffer_[1];
int password_len = buffer_[kAuthReadHeaderSize + username_len];
size_t password_offset = kAuthReadHeaderSize + username_len + 1;
if (buffer_.size() == password_offset && password_len != 0) {
read_header_size_ += password_len;
next_state_ = STATE_AUTH_READ;
return OK;
}
if (buffer_.compare(kAuthReadHeaderSize, username_len, user_) == 0 &&
buffer_.compare(password_offset, password_len, pass_) == 0) {
auth_status_ = kAuthStatusSuccess;
} else {
auth_status_ = kAuthStatusFailure;
}
buffer_.clear();
next_state_ = STATE_AUTH_WRITE;
return OK;
}
next_state_ = STATE_AUTH_READ;
return OK;
}
int Socks5ServerSocket::DoAuthWrite() {
if (buffer_.empty()) {
const char write_data[] = {kSubnegotiationVersion, auth_status_};
buffer_ = std::string(write_data, base::size(write_data));
bytes_sent_ = 0;
}
next_state_ = STATE_AUTH_WRITE_COMPLETE;
int handshake_buf_len = buffer_.size() - bytes_sent_;
DCHECK_LT(0, handshake_buf_len);
handshake_buf_ = base::MakeRefCounted<IOBuffer>(handshake_buf_len);
std::memcpy(handshake_buf_->data(), &buffer_.data()[bytes_sent_],
handshake_buf_len);
return transport_->Write(handshake_buf_.get(), handshake_buf_len,
io_callback_, traffic_annotation_);
}
int Socks5ServerSocket::DoAuthWriteComplete(int result) {
if (result < 0)
return result;
bytes_sent_ += result;
if (bytes_sent_ == buffer_.size()) {
buffer_.clear();
if (auth_status_ == kAuthStatusSuccess) {
next_state_ = STATE_HANDSHAKE_READ;
} else {
return ERR_SOCKS_CONNECTION_FAILED;
}
} else {
next_state_ = STATE_AUTH_WRITE;
}
return OK;
}
int Socks5ServerSocket::DoHandshakeRead() {
next_state_ = STATE_HANDSHAKE_READ_COMPLETE;
if (buffer_.empty()) {
DCHECK_EQ(0U, bytes_received_);
DCHECK_EQ(kReadHeaderSize, read_header_size_);
read_header_size_ = kReadHeaderSize;
}
int handshake_buf_len = read_header_size_ - bytes_received_;
int handshake_buf_len = read_header_size_ - buffer_.size();
DCHECK_LT(0, handshake_buf_len);
handshake_buf_ = base::MakeRefCounted<IOBuffer>(handshake_buf_len);
return transport_->Read(handshake_buf_.get(), handshake_buf_len,
@ -408,11 +530,10 @@ int Socks5ServerSocket::DoHandshakeReadComplete(int result) {
}
buffer_.append(handshake_buf_->data(), result);
bytes_received_ += result;
// When the first few bytes are read, check how many more are required
// and accordingly increase them
if (bytes_received_ == kReadHeaderSize) {
if (buffer_.size() == kReadHeaderSize) {
if (buffer_[0] != kSOCKS5Version || buffer_[2] != kSOCKS5Reserved) {
net_log_.AddEventWithIntParams(NetLogEventType::SOCKS_UNEXPECTED_VERSION,
"version", buffer_[0]);
@ -463,7 +584,7 @@ int Socks5ServerSocket::DoHandshakeReadComplete(int result) {
}
// When the final bytes are read, setup handshake.
if (bytes_received_ == read_header_size_) {
if (buffer_.size() == read_header_size_) {
size_t port_start = read_header_size_ - sizeof(uint16_t);
uint16_t port_net;
std::memcpy(&port_net, &buffer_[port_start], sizeof(uint16_t));
@ -495,16 +616,14 @@ int Socks5ServerSocket::DoHandshakeWrite() {
if (buffer_.empty()) {
const char write_data[] = {
// clang-format off
kSOCKS5Version,
reply_,
kSOCKS5Reserved,
kEndPointResolvedIPv4,
0x00,
0x00,
0x00,
0x00, // BND.ADDR
0x00,
0x00, // BND.PORT
0x00, 0x00, 0x00, 0x00, // BND.ADDR
0x00, 0x00, // BND.PORT
// clang-format on
};
buffer_ = std::string(write_data, base::size(write_data));
bytes_sent_ = 0;
@ -536,10 +655,8 @@ int Socks5ServerSocket::DoHandshakeWriteComplete(int result) {
"error_code", reply_);
return ERR_SOCKS_CONNECTION_FAILED;
}
} else if (bytes_sent_ < buffer_.size()) {
next_state_ = STATE_HANDSHAKE_WRITE;
} else {
NOTREACHED();
next_state_ = STATE_HANDSHAKE_WRITE;
}
return OK;

21
src/net/tools/naive/socks5_server_socket.h
View File

@ -31,6 +31,8 @@ struct NetworkTrafficAnnotationTag;
class Socks5ServerSocket : public StreamSocket {
public:
Socks5ServerSocket(std::unique_ptr<StreamSocket> transport_socket,
const std::string& user,
const std::string& pass,
const NetworkTrafficAnnotationTag& traffic_annotation);
// On destruction Disconnect() is called.
@ -80,6 +82,10 @@ class Socks5ServerSocket : public StreamSocket {
STATE_GREET_READ_COMPLETE,
STATE_GREET_WRITE,
STATE_GREET_WRITE_COMPLETE,
STATE_AUTH_READ,
STATE_AUTH_READ_COMPLETE,
STATE_AUTH_WRITE,
STATE_AUTH_WRITE_COMPLETE,
STATE_HANDSHAKE_WRITE,
STATE_HANDSHAKE_WRITE_COMPLETE,
STATE_HANDSHAKE_READ,
@ -99,10 +105,14 @@ class Socks5ServerSocket : public StreamSocket {
void OnReadWriteComplete(CompletionOnceCallback callback, int result);
int DoLoop(int last_io_result);
int DoGreetWrite();
int DoGreetWriteComplete(int result);
int DoGreetRead();
int DoGreetReadComplete(int result);
int DoGreetWrite();
int DoGreetWriteComplete(int result);
int DoAuthRead();
int DoAuthReadComplete(int result);
int DoAuthWrite();
int DoAuthWriteComplete(int result);
int DoHandshakeRead();
int DoHandshakeReadComplete(int result);
int DoHandshakeWrite();
@ -131,11 +141,9 @@ class Socks5ServerSocket : public StreamSocket {
// overlying connection is free to communicate.
bool completed_handshake_;
// These contain the bytes received / sent by the SOCKS handshake.
size_t bytes_received_;
// Contains the bytes sent by the SOCKS handshake.
size_t bytes_sent_;
size_t greet_read_header_size_;
size_t read_header_size_;
bool was_ever_used_;
@ -143,7 +151,10 @@ class Socks5ServerSocket : public StreamSocket {
SocksEndPointAddressType address_type_;
int address_size_;
std::string user_;
std::string pass_;
char auth_method_;
char auth_status_;
char reply_;
HostPortPair request_endpoint_;