SOCKS5 proxy over HTTP tunnel, which simply coverts a certain HTTPS proxy (which doesn't prohibit CONNECT on non-443 port) into SOCKS5 proxy.
+--------+ +--------+ +-----------+ +--------+
| +-------> socks5 +--------> +------> |
| client | | over | |https proxy| | server |
| <-------+ https <--------+ <------+ |
+--------+ +--------+ +-----------+ +--------+
If you're looking for a transparent tcp proxy via http tunnel on Linux, try transocks instead please.
socks-over-https -h
-c string
config file (default "config.json")
-s string
Send signal to a master process: install, remove, start, stop, status (default "status")config file is defined as following json:
{
"log": {},
"settings": {},
"proxies": []
}
- log, Log configuration to control log outputs
- settings, Server internal parameters configuration
- proxies, socks & http proxy pairs
the proxy pair is configured as blow
{
"socks":{ // socks5 server config
"address":"127.0.0.1", // socks5 server bind address, 127.0.0.1 by default
"port":10800, // mandatory, socks5 server bind port, different from each server
"user":"", // proxy username, no-auth by default
"pass":"" // proxy password, no-auth by default
},
"http":{ // http tunnel upstream config
"address":"10.1.3.1", // mandatory, upstream http proxy hostname
"port":1080, // mandatory, upstream http proxy port
"user":"", // proxy username, no-auth by default
"pass":"" // proxy password, no-auth by default
}
}
A typical HTTP proxy which can proxy HTTPS requests a.k.a. HTTPS proxy is mostly based on the HTTP tunnel by using the CONNECT method of HTTP.
For example, a typical protocol of https proxy request to https://example.com/some/path is
CONNECT example.com:443 HTTP/1.1
Host: example.com:443
User-Agent: some-user-agent
Proxy-Authorization: Basic dXNlcjpwYXNz
The proxy will open a TCP tunnel to example.com:443 for the client and return
HTTP/1.1 200 Connection established
Then any traffic sent to the proxy will be redirected to the TCP tunnel opened by proxy.
We can turn the TCP tunnel above for SOCKS5 protocol's tunnel. According to RFC1928, the protocol of socks5 proxy request to https://example.com/some/path with https tunnel is
- client sends the version identifier/method selection message to proxy
using socks v5, using 3 auth methods: no auth, GSSAPI and username/password
+-----+----------+----------+
| VER | NMETHODS | METHODS |
+-----+----------+----------+
| 0x05| 0x03 | 0x000102 |
+-----+----------+----------+
- server responds the version message
using socks v5, using the no auth method
+-----+--------+
| VER | METHOD |
+-----+--------+
| 0x05| 0x02 |
+-----+--------+
- client sends the tunnel request to target server
CONNECT(CMD 1) to domain(ATYP 3) example.com with port 433
+-----+-----+-----+------+-------------+----------+
| VER | CMD | RSV | ATYP | DST.ADDR | DST.PORT |
+-----+-----+-----+------+-------------+----------+
| 0x05| 0x01| 0x00| 0x03 | example.com | 443 |
+-----+-----+-----+------+-------------+----------+
- server gets the request and connects to the remote https proxy, then respond to client
- server connect to https proxy
CONNECT example.com:443 HTTP/1.1
Host: example.com:443
User-Agent: some-user-agent
Proxy-Authorization: Basic dXNlcjpwYXNz
- remote proxy responds
HTTP/1.1 200 Connection established
- respond success (REP 0) to client
+-----+-----+------+------+----------+----------+
| VER | REP | RSV | ATYP | BND.ADDR | BND.PORT |
+-----+-----+------+------+----------+----------+
| 0x05| 0x00| 0x00 | 1 | 0.0.0.0 | 7648 |
+-----+-----+------+------+----------+----------+
- data transfer: Any traffic from client in written into http tunnel opened by proxy, any traffic from tunnel is written to client.
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