First commit, (Socks5 server!)

internal/config/config.go

@@ -0,0 +1,95 @@
+// ==============================================================================
+// MasterHttpRelayVPN
+// Author: MasterkinG32
+// Github: https://github.com/masterking32
+// Year: 2026
+// ==============================================================================
+
+package config
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+)
+
+type Config struct {
+	AESEncryptionKey string
+	SOCKSHost        string
+	SOCKSPort        int
+	SOCKSAuth        bool
+	SOCKSUsername    string
+	SOCKSPassword    string
+}
+
+func Load(path string) (Config, error) {
+	cfg := Config{
+		SOCKSHost: "127.0.0.1",
+		SOCKSPort: 1080,
+	}
+
+	file, err := os.Open(path)
+	if err != nil {
+		return Config{}, err
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		if line == "" || strings.HasPrefix(line, "#") {
+			continue
+		}
+
+		key, value, ok := strings.Cut(line, "=")
+		if !ok {
+			return Config{}, fmt.Errorf("invalid config line: %q", line)
+		}
+
+		key = strings.TrimSpace(key)
+		value = strings.TrimSpace(value)
+
+		switch key {
+		case "AES_ENCRYPTION_KEY":
+			cfg.AESEncryptionKey = trimString(value)
+		case "SOCKS_HOST":
+			cfg.SOCKSHost = trimString(value)
+		case "SOCKS_PORT":
+			port, err := strconv.Atoi(value)
+			if err != nil {
+				return Config{}, fmt.Errorf("parse SOCKS_PORT: %w", err)
+			}
+			cfg.SOCKSPort = port
+		case "SOCKS_AUTH":
+			auth, err := strconv.ParseBool(value)
+			if err != nil {
+				return Config{}, fmt.Errorf("parse SOCKS_AUTH: %w", err)
+			}
+			cfg.SOCKSAuth = auth
+		case "SOCKS_USERNAME":
+			cfg.SOCKSUsername = trimString(value)
+		case "SOCKS_PASSWORD":
+			cfg.SOCKSPassword = trimString(value)
+		}
+	}
+
+	if err := scanner.Err(); err != nil {
+		return Config{}, err
+	}
+
+	if cfg.SOCKSAuth && (cfg.SOCKSUsername == "" || cfg.SOCKSPassword == "") {
+		return Config{}, fmt.Errorf("SOCKS auth enabled but username/password missing")
+	}
+
+	if cfg.SOCKSPort < 1 || cfg.SOCKSPort > 65535 {
+		return Config{}, fmt.Errorf("invalid SOCKS_PORT: %d", cfg.SOCKSPort)
+	}
+
+	return cfg, nil
+}
+
+func trimString(value string) string {
+	return strings.Trim(value, `"`)
+}