55 lines
1.5 KiB
Go
55 lines
1.5 KiB
Go
// dialer.go - Tor backed proxy.Dialer.
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//
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// To the extent possible under law, Yawning Angel waived all copyright
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// and related or neighboring rights to bulb, using the creative
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// commons "cc0" public domain dedication. See LICENSE or
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// <http://creativecommons.org/publicdomain/zero/1.0/> for full details.
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package asaur
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import (
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"strconv"
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"strings"
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"golang.org/x/net/proxy"
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)
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// Dialer returns a proxy.Dialer for the given Tor instance.
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func (c *Conn) Dialer(auth *proxy.Auth) (proxy.Dialer, error) {
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const (
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cmdGetInfo = "GETINFO"
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socksListeners = "net/listeners/socks"
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unixPrefix = "unix:"
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)
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// Query for the SOCKS listeners via a GETINFO request.
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resp, err := c.Request("%s %s", cmdGetInfo, socksListeners)
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if err != nil {
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return nil, err
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}
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if len(resp.Data) != 1 {
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return nil, newProtocolError("no SOCKS listeners configured")
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}
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splitResp := strings.Split(resp.Data[0], " ")
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if len(splitResp) < 1 {
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return nil, newProtocolError("no SOCKS listeners configured")
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}
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// The first listener will have a "net/listeners/socks=" prefix, and all
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// entries are QuotedStrings.
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laddrStr := strings.TrimPrefix(splitResp[0], socksListeners+"=")
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if laddrStr == splitResp[0] {
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return nil, newProtocolError("failed to parse SOCKS listener")
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}
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laddrStr, _ = strconv.Unquote(laddrStr)
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// Construct the proxyDialer.
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if strings.HasPrefix(laddrStr, unixPrefix) {
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unixPath := strings.TrimPrefix(laddrStr, unixPrefix)
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return proxy.SOCKS5("unix", unixPath, auth, proxy.Direct)
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}
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return proxy.SOCKS5("tcp", laddrStr, auth, proxy.Direct)
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}
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