diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..dfe0770
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,2 @@
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diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a727c0a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
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diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..2dc1708
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..1245b0a
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,17 @@
+cargo-features = ["strip"]
+
+[package]
+name = "vp-crypt"
+version = "0.1.0"
+edition = "2021"
+description = "VandalProof encryption/decryption for an ArctixFox firmware"
+authors = ["MG_REX"]
+
+[dependencies]
+rand = "0.4"
+aes = "0.8.1"
+cbc = { version = "0.1.2", features = ["alloc"] }
+clap = { version = "3.1.18", features = ["derive"] }
+
+[profile.release]
+symbols = "strip"
diff --git a/readme.md b/readme.md
new file mode 100644
index 0000000..4ba1123
--- /dev/null
+++ b/readme.md
@@ -0,0 +1,11 @@
+# Description
+A tool to encrypt/decrypt ArcticFox firmware (VandalProof encryption)
+
+# Usage
+```
+vp-crypt <INPUT FILE> [OPTIONS]
+OPTIONS:
+    -e                 Encrypt
+    -h, --help         Print help information
+    -o <OUTPUT>        Output file
+```
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..3cb4a77
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,114 @@
+use std::{
+    fs,
+    path::{Path, PathBuf},
+    str::FromStr,
+};
+
+use aes::cipher::{
+    block_padding::{Pkcs7, UnpadError},
+    BlockDecryptMut, BlockEncryptMut, KeyIvInit,
+};
+use clap::Parser;
+use rand::{self, Rng};
+
+const KEY: &[u8; 16] = &[
+    0x46, 0x41, 0x38, 0x39, 0x34, 0x31, 0x32, 0x44, 0x38, 0x37, 0x42, 0x30, 0x45, 0x46, 0x44, 0x39,
+];
+
+type Aes128CbcEnc = cbc::Encryptor<aes::Aes128>;
+type Aes128CbcDec = cbc::Decryptor<aes::Aes128>;
+
+#[derive(Parser, Debug)]
+struct Args {
+    input: String,
+
+    #[clap(short)]
+    encrypt: bool,
+
+    #[clap(short)]
+    output: Option<String>,
+}
+
+fn main() {
+    let args = Args::parse();
+    let input = PathBuf::from_str(&args.input).unwrap();
+
+    let output = if let Some(out) = &args.output {
+        PathBuf::from_str(&out).unwrap()
+    } else {
+        make_output_name(&input, args.encrypt).expect("Invalid file name")
+    };
+
+    let firmware_source = fs::read(&input).expect("File reading error");
+    let firmware_dest = if args.encrypt {
+        encrypt_firmware(&firmware_source, KEY)
+    } else {
+        decrypt_firmware(&firmware_source, KEY).expect("Can't decrypt. Maybe invalid firmware?")
+    };
+
+    fs::write(&output, &firmware_dest).expect("File writing error");
+}
+
+fn make_output_name(input: &Path, encrypt: bool) -> Option<PathBuf> {
+    let ext = input.extension();
+    let mut output = PathBuf::new();
+
+    let new_ext = if encrypt { "encrypted" } else { "decrypted" }.to_string();
+
+    let stem = input.with_extension("");
+    output.push(stem);
+    if let Some(e) = ext {
+        output.set_extension(new_ext + "." + e.to_str().unwrap_or("bin"));
+    }
+
+    Some(output)
+}
+
+fn decrypt_firmware(source: &[u8], key: &[u8; 16]) -> Result<Vec<u8>, UnpadError> {
+    let (iv, encrypted) = source.split_at(16);
+
+    Aes128CbcDec::new(key.into(), iv.into()).decrypt_padded_vec_mut::<Pkcs7>(encrypted)
+}
+
+fn encrypt_firmware(source: &[u8], key: &[u8; 16]) -> Vec<u8> {
+    let mut iv = [0; 16];
+    rand::thread_rng().fill_bytes(&mut iv);
+
+    let mut result = vec![];
+    result.extend_from_slice(&iv);
+    result.extend_from_slice(
+        &Aes128CbcEnc::new(key.into(), &iv.into()).encrypt_padded_vec_mut::<Pkcs7>(&source),
+    );
+
+    result
+}
+
+///Decrypts `Dummy` dll from `NCode.dll` resources
+fn decrypt_lib(lib_raw: &mut [u8]) {
+    let mut counter = 3u32;
+
+    lib_raw.iter_mut().for_each(|b| {
+        *b = *b ^ counter as u8;
+        counter = if counter + 3 >= 255 { 3 } else { counter + 3 };
+    });
+}
+
+///Generates `AES` key from the public key token
+fn generate_key(pub_token_key: &[u8; 8]) -> [u8; 16] {
+    let mut key = [0; 16];
+
+    let mut num = 66_u32;
+    let mut ki = 0;
+
+    pub_token_key.iter().enumerate().for_each(|(_i, &b)| {
+        let byte = b ^ num as u8;
+        num += 3;
+
+        let b_str = format!("{:02X?}", byte);
+        key[ki] = b_str.as_bytes()[0];
+        key[ki + 1] = b_str.as_bytes()[1];
+        ki += 2;
+    });
+
+    key
+}