rust_sodium 0.10.2

Fast cryptographic library for Rust (bindings to libsodium)
Documentation 
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//! `HMAC-SHA-256` `HMAC-SHA-256` is conjectured to meet the standard notion of
//! unforgeability.

use crate::ffi::{
    crypto_auth_hmacsha256, crypto_auth_hmacsha256_BYTES, crypto_auth_hmacsha256_KEYBYTES,
    crypto_auth_hmacsha256_final, crypto_auth_hmacsha256_init, crypto_auth_hmacsha256_state,
    crypto_auth_hmacsha256_update, crypto_auth_hmacsha256_verify,
};

auth_module!(
    crypto_auth_hmacsha256,
    crypto_auth_hmacsha256_verify,
    crypto_auth_hmacsha256_KEYBYTES as usize,
    crypto_auth_hmacsha256_BYTES as usize
);

auth_state!(
    crypto_auth_hmacsha256_state,
    crypto_auth_hmacsha256_init,
    crypto_auth_hmacsha256_update,
    crypto_auth_hmacsha256_final,
    crypto_auth_hmacsha256_BYTES
);

#[cfg(test)]
#[rustfmt::skip]
mod test {
    use super::*;

    #[test]
    fn test_vector_1() {
        // corresponding to tests/auth2.c from NaCl
        unwrap!(crate::init());
        let key = Key([0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c,
                       0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
                       0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20]);
        let c = [0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
                 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
                 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
                 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd];
        let a_expected = Tag([0x37, 0x2e, 0xfc, 0xf9, 0xb4, 0x0b, 0x35, 0xc2, 0x11, 0x5b, 0x13,
                              0x46, 0x90, 0x3d, 0x2e, 0xf4, 0x2f, 0xce, 0xd4, 0x6f, 0x08, 0x46,
                              0xe7, 0x25, 0x7b, 0xb1, 0x56, 0xd3, 0xd7, 0xb3, 0x0d, 0x3f]);
        let a = authenticate(&c, &key);
        assert!(a == a_expected);
    }

    #[test]
    fn test_vector_state_1() {
        // corresponding to tests/auth2.c from NaCl
        unwrap!(crate::init());
        let key = [0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d,
                   0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a,
                   0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20];
        let c = [0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
                 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
                 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
                 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd];
        let a_expected = Tag([0x37, 0x2e, 0xfc, 0xf9, 0xb4, 0x0b, 0x35, 0xc2, 0x11, 0x5b, 0x13,
                              0x46, 0x90, 0x3d, 0x2e, 0xf4, 0x2f, 0xce, 0xd4, 0x6f, 0x08, 0x46,
                              0xe7, 0x25, 0x7b, 0xb1, 0x56, 0xd3, 0xd7, 0xb3, 0x0d, 0x3f]);
        let mut state = State::init(&key);
        state.update(&c);
        let a = state.finalize();
        assert!(a == a_expected);
    }
}