nutek_cipher_lib/
lib.rs

1pub mod aes_gcm_siv {
2    extern crate aes_gcm_siv;
3    use aes_gcm_siv::{
4        aead::{Aead, KeyInit},
5        Aes256GcmSiv, Nonce, Key  // Or `Aes128GcmSiv`
6    };
7    use aes_gcm_siv::aead::consts::U12;
8    use aes_gcm_siv::aead::generic_array::GenericArray;
9
10    /// Decrypts the given ciphertext with the given key and nonce.
11    /// The key must be 32 bytes long and the nonce must be 12 bytes long.
12    /// The plaintext is returned as an option vector of bytes.
13    /// 
14    /// # Examples
15    /// 
16    /// ```
17    /// use nutek_cipher_lib::aes_gcm_siv::decrypt;
18    /// use nutek_cipher_lib::aes_gcm_siv::encrypt;
19    /// 
20    /// fn main() {
21    ///     let ciphertext = encrypt(b"hello world", b"123456123456", b"12345678123456781234567812345678");
22    ///     let plaintext = decrypt( b"12345678123456781234567812345678", b"123456123456", ciphertext).unwrap();
23    ///     assert_eq!(plaintext, b"hello world");
24    /// }
25    /// ```
26    /// 
27    pub fn decrypt(key_slice: &[u8], nonce_slice: &[u8], ciphertext: Vec<u8>) -> Option<Vec<u8>> {
28        let key = Key::<Aes256GcmSiv>::from_slice(key_slice);
29        let cipher = Aes256GcmSiv::new(&key);
30        let nonce: &GenericArray<u8, U12> = Nonce::from_slice(nonce_slice);
31        let plaintext = cipher.decrypt(nonce, ciphertext.as_ref()).ok()?;
32        Some(plaintext)
33    }
34
35    /// Encrypts the given plaintext with the given key and nonce.
36    /// The key must be 32 bytes long and the nonce must be 12 bytes long.
37    /// The ciphertext is returned as a vector of bytes.
38    /// 
39    /// # Examples
40    /// 
41    /// ```
42    /// use nutek_cipher_lib::aes_gcm_siv::encrypt;
43    /// 
44    /// fn main() {
45    ///     encrypt(b"hello world", b"123456123456", b"12345678123456781234567812345678");
46    /// }
47    /// ```
48    /// 
49    pub fn encrypt(plaintext: &[u8], nonce_slice: &[u8], key_slice: &[u8]) -> Vec<u8> {
50        let key = Key::<Aes256GcmSiv>::from_slice(key_slice);
51        let cipher = Aes256GcmSiv::new(&key);
52        let nonce: &GenericArray<u8, U12> = Nonce::from_slice(nonce_slice);
53        let ciphertext = cipher.encrypt(nonce, plaintext.as_ref()).unwrap();
54        if ciphertext.len() == 0 {
55            panic!("❌ Ciphertext is empty");
56        } else if ciphertext.len() > aes_gcm_siv::C_MAX.try_into().unwrap() {
57            println!("❌ Ciphertext is too long");
58        }
59        ciphertext
60    }
61}
62
63#[cfg(test)]
64mod tests {
65    use super::*;
66
67    #[test]
68    fn test_encrypt_decrypt() {
69        let key = b"12345678123456781234567812345678";
70        let nonce = b"123456123456";
71        let plaintext = b"hello world";
72
73        // let ciphertext = encrypt(key, nonce, plaintext);
74        let ciphertext = aes_gcm_siv::encrypt(plaintext, nonce, key);
75        let decrypted_content = aes_gcm_siv::decrypt(key, nonce, ciphertext).unwrap();
76
77        assert_eq!(plaintext, &decrypted_content[..]);
78    }
79}
nutek_cipher_lib/lib.rs

nutek_cipher_lib/
lib.rs
