universal_wallet 0.6.1

use crate::Error;
use blake2::{Blake2b, Digest};
use crypto_box::{aead::Aead, ChaChaBox, PublicKey, SecretKey};
use generic_array::GenericArray;
use std::convert::TryInto;

pub fn make_channel(their_public: &PublicKey, our_secret: &SecretKey) -> ChaChaBox {
    ChaChaBox::new(their_public, our_secret)
}
/// Make Box
///
/// Creates an authcrypted sealed box construction using AEAD
/// since 0.5.0
///
pub fn make_box(
    data: &[u8],
    public_key: &PublicKey,
    secret_key: &SecretKey,
    nonce: &[u8],
) -> Result<Vec<u8>, Error> {
    let nonce = GenericArray::from_slice(nonce);
    make_channel(public_key, secret_key)
        .encrypt(nonce, data) //GenericArray::from_slice(nonce), data)
        .map_err(Error::AeadCryptoError)
}
/// Seal Box
///
/// Creates an anoncrypted secret box construction, generic over key agreement method and asym encryptor
/// uses AEAD with new random KP and nonce
///
pub fn seal_box(data: &[u8], rk: &PublicKey) -> Result<Vec<u8>, Error> {
    let sk = SecretKey::generate(&mut rand::rngs::OsRng);
    let pk = PublicKey::from(&sk);
    let nonce = &Blake2b::new()
        .chain(&pk.as_bytes())
        .chain(&rk.as_bytes())
        .finalize()[..24];
    let b = make_box(data, rk, &sk, nonce)?;
    Ok([pk.as_bytes().to_vec(), b].concat())
}

/// Decripts message and returns rav `Vec` of bytes
///
/// # Parameters
///
/// * data - cypher data [messag]
/// * pk - `PublicKey` refference
/// * sk - `SecretKey` refference
///
pub fn open_box(
    data: &[u8],
    pk: &PublicKey,
    sk: &SecretKey,
    nonce: &[u8],
) -> Result<Vec<u8>, Error> {
    let nonce = GenericArray::from_slice(nonce);
    make_channel(pk, sk)
        .decrypt(nonce, data)
        .map_err(Error::AeadCryptoError)
}

/// Unseal Box
///
/// Opens an anoncrypted box
/// NOTE: key length is 32 bytes, hence the magic numbers
///
/// # Parameters
///
/// * data - slice of cypher joined with the cryptography information
/// * rsk - secret key for the cryptography
///
pub fn unseal_box(data: &[u8], rsk: &SecretKey) -> Result<Vec<u8>, Error> {
    if data.len() < KEYSIZE {
        Err(Error::BoxToSmall)
    } else {
        let pk_slice: [u8; KEYSIZE] = data[..KEYSIZE].try_into().map_err(|_| Error::BoxToSmall)?;
        let epk = PublicKey::from(pk_slice);
        let rpk = PublicKey::from(rsk);
        open_box(
            &data[KEYSIZE..],
            &epk,
            rsk,
            &Blake2b::new()
                .chain(&epk.as_bytes())
                .chain(&rpk.as_bytes())
                .finalize()[..24],
        )
    }
}

/// Size of the key sued for cryptography
pub const KEYSIZE: usize = 32;

#[test]
fn too_short() -> Result<(), Error> {
    let sk = SecretKey::generate(&mut rand::rngs::OsRng);

    let message = b"bla";

    assert!(unseal_box(&message[..], &sk).is_err());

    Ok(())
}

#[test]
fn round_trip() -> Result<(), Error> {
    //
    let ask = SecretKey::generate(&mut rand::rngs::OsRng);
    let akp = (PublicKey::from(&ask), ask);

    let sk = SecretKey::generate(&mut rand::rngs::OsRng);
    let bkp = (PublicKey::from(&sk), sk);

    let message = b"hello there";
    let nonce = b"my noncemy noncemy nonce";

    let aboxb = make_box(message, &bkp.0, &akp.1, nonce)?;

    let unlocked = open_box(&aboxb, &akp.0, &bkp.1, nonce)?;

    assert_eq!(unlocked, message);

    let bsealeda = seal_box(message, &akp.0)?;

    let unsealed = unseal_box(&bsealeda, &akp.1)?;

    assert_eq!(unsealed, message);

    Ok(())
}

#[test]
#[should_panic]
fn test_vector_salsa1() {
    // corresponding to tests/box.c and tests/box3.cpp from NaCl
    let alicesk = SecretKey::from([
        0x77, 0x07, 0x6d, 0x0a, 0x73, 0x18, 0xa5, 0x7d, 0x3c, 0x16, 0xc1, 0x72, 0x51, 0xb2, 0x66,
        0x45, 0xdf, 0x4c, 0x2f, 0x87, 0xeb, 0xc0, 0x99, 0x2a, 0xb1, 0x77, 0xfb, 0xa5, 0x1d, 0xb9,
        0x2c, 0x2a,
    ]);
    let bobpk = PublicKey::from([
        0xde, 0x9e, 0xdb, 0x7d, 0x7b, 0x7d, 0xc1, 0xb4, 0xd3, 0x5b, 0x61, 0xc2, 0xec, 0xe4, 0x35,
        0x37, 0x3f, 0x83, 0x43, 0xc8, 0x5b, 0x78, 0x67, 0x4d, 0xad, 0xfc, 0x7e, 0x14, 0x6f, 0x88,
        0x2b, 0x4f,
    ]);
    let nonce = vec![
        0x69, 0x69, 0x6e, 0xe9, 0x55, 0xb6, 0x2b, 0x73, 0xcd, 0x62, 0xbd, 0xa8, 0x75, 0xfc, 0x73,
        0xd6, 0x82, 0x19, 0xe0, 0x03, 0x6b, 0x7a, 0x0b, 0x37,
    ];
    let m = [
        0xbe, 0x07, 0x5f, 0xc5, 0x3c, 0x81, 0xf2, 0xd5, 0xcf, 0x14, 0x13, 0x16, 0xeb, 0xeb, 0x0c,
        0x7b, 0x52, 0x28, 0xc5, 0x2a, 0x4c, 0x62, 0xcb, 0xd4, 0x4b, 0x66, 0x84, 0x9b, 0x64, 0x24,
        0x4f, 0xfc, 0xe5, 0xec, 0xba, 0xaf, 0x33, 0xbd, 0x75, 0x1a, 0x1a, 0xc7, 0x28, 0xd4, 0x5e,
        0x6c, 0x61, 0x29, 0x6c, 0xdc, 0x3c, 0x01, 0x23, 0x35, 0x61, 0xf4, 0x1d, 0xb6, 0x6c, 0xce,
        0x31, 0x4a, 0xdb, 0x31, 0x0e, 0x3b, 0xe8, 0x25, 0x0c, 0x46, 0xf0, 0x6d, 0xce, 0xea, 0x3a,
        0x7f, 0xa1, 0x34, 0x80, 0x57, 0xe2, 0xf6, 0x55, 0x6a, 0xd6, 0xb1, 0x31, 0x8a, 0x02, 0x4a,
        0x83, 0x8f, 0x21, 0xaf, 0x1f, 0xde, 0x04, 0x89, 0x77, 0xeb, 0x48, 0xf5, 0x9f, 0xfd, 0x49,
        0x24, 0xca, 0x1c, 0x60, 0x90, 0x2e, 0x52, 0xf0, 0xa0, 0x89, 0xbc, 0x76, 0x89, 0x70, 0x40,
        0xe0, 0x82, 0xf9, 0x37, 0x76, 0x38, 0x48, 0x64, 0x5e, 0x07, 0x05,
    ];
    let c = make_box(&m, &bobpk, &alicesk, &nonce).unwrap();
    let cexp = vec![
        0xf3, 0xff, 0xc7, 0x70, 0x3f, 0x94, 0x00, 0xe5, 0x2a, 0x7d, 0xfb, 0x4b, 0x3d, 0x33, 0x05,
        0xd9, 0x8e, 0x99, 0x3b, 0x9f, 0x48, 0x68, 0x12, 0x73, 0xc2, 0x96, 0x50, 0xba, 0x32, 0xfc,
        0x76, 0xce, 0x48, 0x33, 0x2e, 0xa7, 0x16, 0x4d, 0x96, 0xa4, 0x47, 0x6f, 0xb8, 0xc5, 0x31,
        0xa1, 0x18, 0x6a, 0xc0, 0xdf, 0xc1, 0x7c, 0x98, 0xdc, 0xe8, 0x7b, 0x4d, 0xa7, 0xf0, 0x11,
        0xec, 0x48, 0xc9, 0x72, 0x71, 0xd2, 0xc2, 0x0f, 0x9b, 0x92, 0x8f, 0xe2, 0x27, 0x0d, 0x6f,
        0xb8, 0x63, 0xd5, 0x17, 0x38, 0xb4, 0x8e, 0xee, 0xe3, 0x14, 0xa7, 0xcc, 0x8a, 0xb9, 0x32,
        0x16, 0x45, 0x48, 0xe5, 0x26, 0xae, 0x90, 0x22, 0x43, 0x68, 0x51, 0x7a, 0xcf, 0xea, 0xbd,
        0x6b, 0xb3, 0x73, 0x2b, 0xc0, 0xe9, 0xda, 0x99, 0x83, 0x2b, 0x61, 0xca, 0x01, 0xb6, 0xde,
        0x56, 0x24, 0x4a, 0x9e, 0x88, 0xd5, 0xf9, 0xb3, 0x79, 0x73, 0xf6, 0x22, 0xa4, 0x3d, 0x14,
        0xa6, 0x59, 0x9b, 0x1f, 0x65, 0x4c, 0xb4, 0x5a, 0x74, 0xe3, 0x55, 0xa5,
    ];
    assert!(c == cexp);
}
#[test]
#[should_panic]
fn test_vector_salsa2() {
    // corresponding to tests/box2.c and tests/box4.cpp from NaCl
    let bobsk = SecretKey::from([
        0x5d, 0xab, 0x08, 0x7e, 0x62, 0x4a, 0x8a, 0x4b, 0x79, 0xe1, 0x7f, 0x8b, 0x83, 0x80, 0x0e,
        0xe6, 0x6f, 0x3b, 0xb1, 0x29, 0x26, 0x18, 0xb6, 0xfd, 0x1c, 0x2f, 0x8b, 0x27, 0xff, 0x88,
        0xe0, 0xeb,
    ]);
    let alicepk = PublicKey::from([
        0x85, 0x20, 0xf0, 0x09, 0x89, 0x30, 0xa7, 0x54, 0x74, 0x8b, 0x7d, 0xdc, 0xb4, 0x3e, 0xf7,
        0x5a, 0x0d, 0xbf, 0x3a, 0x0d, 0x26, 0x38, 0x1a, 0xf4, 0xeb, 0xa4, 0xa9, 0x8e, 0xaa, 0x9b,
        0x4e, 0x6a,
    ]);
    let nonce = vec![
        0x69, 0x69, 0x6e, 0xe9, 0x55, 0xb6, 0x2b, 0x73, 0xcd, 0x62, 0xbd, 0xa8, 0x75, 0xfc, 0x73,
        0xd6, 0x82, 0x19, 0xe0, 0x03, 0x6b, 0x7a, 0x0b, 0x37,
    ];
    let c = [
        0xf3, 0xff, 0xc7, 0x70, 0x3f, 0x94, 0x00, 0xe5, 0x2a, 0x7d, 0xfb, 0x4b, 0x3d, 0x33, 0x05,
        0xd9, 0x8e, 0x99, 0x3b, 0x9f, 0x48, 0x68, 0x12, 0x73, 0xc2, 0x96, 0x50, 0xba, 0x32, 0xfc,
        0x76, 0xce, 0x48, 0x33, 0x2e, 0xa7, 0x16, 0x4d, 0x96, 0xa4, 0x47, 0x6f, 0xb8, 0xc5, 0x31,
        0xa1, 0x18, 0x6a, 0xc0, 0xdf, 0xc1, 0x7c, 0x98, 0xdc, 0xe8, 0x7b, 0x4d, 0xa7, 0xf0, 0x11,
        0xec, 0x48, 0xc9, 0x72, 0x71, 0xd2, 0xc2, 0x0f, 0x9b, 0x92, 0x8f, 0xe2, 0x27, 0x0d, 0x6f,
        0xb8, 0x63, 0xd5, 0x17, 0x38, 0xb4, 0x8e, 0xee, 0xe3, 0x14, 0xa7, 0xcc, 0x8a, 0xb9, 0x32,
        0x16, 0x45, 0x48, 0xe5, 0x26, 0xae, 0x90, 0x22, 0x43, 0x68, 0x51, 0x7a, 0xcf, 0xea, 0xbd,
        0x6b, 0xb3, 0x73, 0x2b, 0xc0, 0xe9, 0xda, 0x99, 0x83, 0x2b, 0x61, 0xca, 0x01, 0xb6, 0xde,
        0x56, 0x24, 0x4a, 0x9e, 0x88, 0xd5, 0xf9, 0xb3, 0x79, 0x73, 0xf6, 0x22, 0xa4, 0x3d, 0x14,
        0xa6, 0x59, 0x9b, 0x1f, 0x65, 0x4c, 0xb4, 0x5a, 0x74, 0xe3, 0x55, 0xa5,
    ];
    let mexp: Result<Vec<u8>, Error> = Ok(vec![
        0xbe, 0x07, 0x5f, 0xc5, 0x3c, 0x81, 0xf2, 0xd5, 0xcf, 0x14, 0x13, 0x16, 0xeb, 0xeb, 0x0c,
        0x7b, 0x52, 0x28, 0xc5, 0x2a, 0x4c, 0x62, 0xcb, 0xd4, 0x4b, 0x66, 0x84, 0x9b, 0x64, 0x24,
        0x4f, 0xfc, 0xe5, 0xec, 0xba, 0xaf, 0x33, 0xbd, 0x75, 0x1a, 0x1a, 0xc7, 0x28, 0xd4, 0x5e,
        0x6c, 0x61, 0x29, 0x6c, 0xdc, 0x3c, 0x01, 0x23, 0x35, 0x61, 0xf4, 0x1d, 0xb6, 0x6c, 0xce,
        0x31, 0x4a, 0xdb, 0x31, 0x0e, 0x3b, 0xe8, 0x25, 0x0c, 0x46, 0xf0, 0x6d, 0xce, 0xea, 0x3a,
        0x7f, 0xa1, 0x34, 0x80, 0x57, 0xe2, 0xf6, 0x55, 0x6a, 0xd6, 0xb1, 0x31, 0x8a, 0x02, 0x4a,
        0x83, 0x8f, 0x21, 0xaf, 0x1f, 0xde, 0x04, 0x89, 0x77, 0xeb, 0x48, 0xf5, 0x9f, 0xfd, 0x49,
        0x24, 0xca, 0x1c, 0x60, 0x90, 0x2e, 0x52, 0xf0, 0xa0, 0x89, 0xbc, 0x76, 0x89, 0x70, 0x40,
        0xe0, 0x82, 0xf9, 0x37, 0x76, 0x38, 0x48, 0x64, 0x5e, 0x07, 0x05,
    ]);
    let m = open_box(&c, &alicepk, &bobsk, &nonce);
    assert_eq!(mexp.unwrap(), m.unwrap());
}
#[test]
fn test_vector_aead() {
    let ask: [u8; 32] = [
        0x68, 0xf2, 0x8, 0x41, 0x2d, 0x8d, 0xd5, 0xdb, 0x9d, 0xc, 0x6d, 0x18, 0x51, 0x2e, 0x86,
        0xf0, 0xec, 0x75, 0x66, 0x5a, 0xb8, 0x41, 0x37, 0x2d, 0x57, 0xb0, 0x42, 0xb2, 0x7e, 0xf8,
        0x9d, 0x4c,
    ];
    let _apk: [u8; 32] = [
        0xac, 0x3a, 0x70, 0xba, 0x35, 0xdf, 0x3c, 0x3f, 0xae, 0x42, 0x7a, 0x7c, 0x72, 0x2, 0x1d,
        0x68, 0xf2, 0xc1, 0xe0, 0x44, 0x4, 0xb, 0x75, 0xf1, 0x73, 0x13, 0xc0, 0xc8, 0xb5, 0xd4,
        0x24, 0x1d,
    ];

    // Bob's keypair
    let _bsk: [u8; 32] = [
        0xb5, 0x81, 0xfb, 0x5a, 0xe1, 0x82, 0xa1, 0x6f, 0x60, 0x3f, 0x39, 0x27, 0xd, 0x4e, 0x3b,
        0x95, 0xbc, 0x0, 0x83, 0x10, 0xb7, 0x27, 0xa1, 0x1d, 0xd4, 0xe7, 0x84, 0xa0, 0x4, 0x4d,
        0x46, 0x1b,
    ];
    let bpk: [u8; 32] = [
        0xe8, 0x98, 0xc, 0x86, 0xe0, 0x32, 0xf1, 0xeb, 0x29, 0x75, 0x5, 0x2e, 0x8d, 0x65, 0xbd,
        0xdd, 0x15, 0xc3, 0xb5, 0x96, 0x41, 0x17, 0x4e, 0xc9, 0x67, 0x8a, 0x53, 0x78, 0x9d, 0x92,
        0xc7, 0x54,
    ];

    let nonce: &[u8; 24] = &[
        0x69, 0x69, 0x6e, 0xe9, 0x55, 0xb6, 0x2b, 0x73, 0xcd, 0x62, 0xbd, 0xa8, 0x75, 0xfc, 0x73,
        0xd6, 0x82, 0x19, 0xe0, 0x03, 0x6b, 0x7a, 0x0b, 0x37,
    ];

    let m: &[u8] = &[
        0xbe, 0x07, 0x5f, 0xc5, 0x3c, 0x81, 0xf2, 0xd5, 0xcf, 0x14, 0x13, 0x16, 0xeb, 0xeb, 0x0c,
        0x7b, 0x52, 0x28, 0xc5, 0x2a, 0x4c, 0x62, 0xcb, 0xd4, 0x4b, 0x66, 0x84, 0x9b, 0x64, 0x24,
        0x4f, 0xfc, 0xe5, 0xec, 0xba, 0xaf, 0x33, 0xbd, 0x75, 0x1a, 0x1a, 0xc7, 0x28, 0xd4, 0x5e,
        0x6c, 0x61, 0x29, 0x6c, 0xdc, 0x3c, 0x01, 0x23, 0x35, 0x61, 0xf4, 0x1d, 0xb6, 0x6c, 0xce,
        0x31, 0x4a, 0xdb, 0x31, 0x0e, 0x3b, 0xe8, 0x25, 0x0c, 0x46, 0xf0, 0x6d, 0xce, 0xea, 0x3a,
        0x7f, 0xa1, 0x34, 0x80, 0x57, 0xe2, 0xf6, 0x55, 0x6a, 0xd6, 0xb1, 0x31, 0x8a, 0x02, 0x4a,
        0x83, 0x8f, 0x21, 0xaf, 0x1f, 0xde, 0x04, 0x89, 0x77, 0xeb, 0x48, 0xf5, 0x9f, 0xfd, 0x49,
        0x24, 0xca, 0x1c, 0x60, 0x90, 0x2e, 0x52, 0xf0, 0xa0, 0x89, 0xbc, 0x76, 0x89, 0x70, 0x40,
        0xe0, 0x82, 0xf9, 0x37, 0x76, 0x38, 0x48, 0x64, 0x5e, 0x07, 0x05,
    ];

    let cipher: &[u8] = &[
        162, 151, 131, 116, 237, 39, 156, 251, 205, 109, 109, 164, 39, 228, 45, 4, 151, 223, 185,
        31, 186, 135, 101, 52, 147, 244, 200, 241, 221, 217, 100, 23, 231, 128, 18, 85, 249, 67,
        214, 224, 7, 133, 228, 210, 23, 27, 226, 150, 93, 210, 217, 35, 94, 95, 125, 169, 142, 127,
        95, 231, 54, 102, 101, 83, 32, 224, 224, 7, 252, 159, 48, 106, 67, 104, 116, 223, 63, 9,
        83, 200, 58, 197, 215, 251, 30, 97, 62, 141, 244, 110, 34, 116, 171, 50, 227, 250, 19, 110,
        30, 173, 20, 127, 130, 51, 179, 211, 255, 145, 220, 138, 245, 247, 1, 139, 213, 108, 189,
        114, 190, 215, 218, 45, 91, 163, 185, 224, 143, 222, 232, 216, 153, 237, 97, 111, 228, 123,
        235, 222, 165, 248, 137, 37, 31, 188, 248, 148, 142,
    ];

    // encryption test
    let secret_key = SecretKey::from(ask);
    let public_key = PublicKey::from(bpk);
    // let nonce = XNonce::from_slice(nonce);

    let ciphertext = make_box(m, &public_key, &secret_key, nonce).unwrap();

    assert_eq!(cipher, ciphertext);

    // decryption test
    let plaintext = open_box(&ciphertext[..], &public_key, &secret_key, nonce).unwrap();

    assert_eq!(m, &plaintext[..]);
}