Initial commit

.gitignore

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+server
+
+### Linux ###
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
+### macOS ###
+*.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+### Windows ###
+# Windows thumbnail cache files
+Thumbs.db
+ehthumbs.db
+ehthumbs_vista.db
+
+# Folder config file
+Desktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+
+
+# End of https://www.gitignore.io/api/macos,linux,windows

Dockerfile

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+FROM scratch
+ADD server .
+CMD ["./server"]

README.md

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+# Build
+The following command will perform a build of a static binary for Linux.
+The result of this build can be used by a scratch Docker image. This reduces container size drastically.
+
+```bash
+CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o server .
+```
+
+# Docker image usage
+
+You can start Docker container with the following command (make sure to replace `<USER>` and `<PASSWORD>` placeholders with your own credentials).
+
+```bash
+docker run -d --name socks5-proxy -p 1080:1080 -e USER=<USER> -e PASSWORD=<PASSWORD> ocassio/go-socks5-proxy
+```
+
+# Special thanks
+
+- The original idea. Actually this project is just a very lightweight variation of the serj's one:
+   https://github.com/serjs/socks5-server
+- SOCKS 5 server implementation for Go:
+   https://github.com/armon/go-socks5
+- Article about building minimal Go containers with Docker by Nick Gauthier:
+   https://blog.codeship.com/building-minimal-docker-containers-for-go-applications/

server.go

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+package main
+
+import (
+	"log"
+	"os"
+
+	"github.com/armon/go-socks5"
+)
+
+func main() {
+
+	creadentials := socks5.StaticCredentials{
+		os.Getenv("USER"): os.Getenv("PASSWORD"),
+	}
+	authenticator := socks5.UserPassAuthenticator{Credentials: creadentials}
+
+	// Create a SOCKS5 server
+	config := &socks5.Config{
+		AuthMethods: []socks5.Authenticator{authenticator},
+		Logger:      log.New(os.Stdout, "", log.LstdFlags),
+	}
+	server, err := socks5.New(config)
+	if err != nil {
+		panic(err)
+	}
+
+	// Create SOCKS5 proxy on localhost port 8000
+	if err := server.ListenAndServe("tcp", "0.0.0.0:1080"); err != nil {
+		panic(err)
+	}
+}