From e353ec1ee62274d3d21ef250c0f33e876e0880d9 Mon Sep 17 00:00:00 2001
From: Keuin <keuinx@gmail.com>
Date: Fri, 28 Jul 2023 01:22:46 +0800
Subject: init version

---
 .gitignore  |   4 +
 Cargo.lock  | 563 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml  |  11 ++
 src/main.rs |  45 +++++
 4 files changed, 623 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 src/main.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..076da85
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+/target
+
+.idea/
+.code/
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..41d084d
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,563 @@
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+checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..4066d3d
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "udp-obfs-rs"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+clap = { version = "4", features = ["derive"] }
+hex = "0.4.3"
+tokio = { version = "1", features = ["full"] }
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..96b6873
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,45 @@
+
+
+use clap::Parser;
+use tokio::net::UdpSocket;
+
+/// Simple program to greet a person
+#[derive(Parser, Debug)]
+#[command(author, version, about, long_about = None)]
+struct Args {
+    /// The address and port to listen and accept cleartext UDP datagrams from
+    #[arg(short, long)]
+    bind: String,
+
+    /// The destination to send obfuscated UDP datagrams to
+    #[arg(short, long)]
+    sendto: String,
+
+    /// The hex representation of XOR key to use
+    #[arg(short, long)]
+    key: String,
+}
+
+#[tokio::main]
+async fn main() {
+    let args = Args::parse();
+    let key = hex::decode(args.key)
+        .expect("failed to decode key hex string");
+    let sock = UdpSocket::bind(&args.bind).await
+        .expect("failed to bind UDP endpoint");
+    let mut buf = [0; 65536];
+    loop {
+        if let Ok((len, _)) = sock.recv_from(&mut buf).await {
+            let mut i = 0;
+            let n = key.len();
+            for j in 0..len {
+                buf[j] ^= key[i];
+                i += 1;
+                if i == n {
+                    i = 0;
+                }
+            }
+            let _ = sock.send_to(&buf[..len], &args.sendto).await;
+        }
+    }
+}
-- 
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