62 lines
1.9 KiB
Rust
62 lines
1.9 KiB
Rust
use pbkdf2::{self, password_hash::PasswordHasher};
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use base64::{Engine as _};
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use generic_array::typenum::{UInt, B1, B0, UTerm, U32};
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use wasm_bindgen::prelude::*;
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use aes_gcm::{
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aead::{Aead, KeyInit, generic_array::GenericArray},
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Aes256Gcm
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};
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#[wasm_bindgen]
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pub struct Crypto {
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iv: IV,
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c: Aes256Gcm
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}
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type Key = GenericArray<u8, U32>;
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type IV = GenericArray<u8, UInt<UInt<UInt<UInt<UTerm, B1>, B1>, B0>, B0>>;
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#[wasm_bindgen]
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impl Crypto {
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#[wasm_bindgen(constructor)]
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pub fn new(password: &str, salt: &str) -> Self {
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super::utils::set_panic_hook();
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let key = Self::_pbkdf2(password, salt, 1000, 32);
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let iv = Self::_pbkdf2(password, salt, 5000, 12);
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println!("Key {}\nIV {}", hex::encode(&key), hex::encode(&iv));
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let iv: IV = GenericArray::clone_from_slice(&iv);
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let key: &Key = GenericArray::from_slice(&key);
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let c = Aes256Gcm::new(key);
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Crypto { iv: iv, c:c }
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}
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pub fn sha256(input: &str) -> String {
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sha256::digest(input)
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}
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fn _pbkdf2(password: &str, salt: &str, rounds: u32, output_length: usize) -> Vec<u8> {
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let params = pbkdf2::Params { rounds: rounds, output_length: output_length };
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let salt = base64::engine::general_purpose::STANDARD_NO_PAD.encode(salt);
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let salt = pbkdf2::password_hash::Salt::new(&salt).unwrap();
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let res = pbkdf2::Pbkdf2.hash_password_customized(password.as_bytes(), None, None, params, salt).unwrap();
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res.hash.unwrap().as_bytes().to_owned()
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}
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pub fn encrypt(&self, plaintext: &str) -> String {
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base64::engine::general_purpose::STANDARD_NO_PAD.encode(self.c.encrypt(&self.iv, plaintext.as_bytes()).unwrap())
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}
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pub fn decrypt(&self, ciphertext: &str) -> String {
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let ciphertext = base64::engine::general_purpose::STANDARD_NO_PAD.decode(ciphertext).unwrap();
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String::from_utf8(self.c.decrypt(&self.iv, &*ciphertext).unwrap()).unwrap()
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}
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} |