rust_sodium-sys 0.1.2

// crypto_auth_hmacsha256.h

#[repr(C)]
#[derive(Copy, Clone)]
pub struct crypto_auth_hmacsha256_state {
    ictx: crypto_hash_sha256_state,
    octx: crypto_hash_sha256_state,
}

pub const crypto_auth_hmacsha256_BYTES: usize = 32;
pub const crypto_auth_hmacsha256_KEYBYTES: usize = 32;


extern "C" {
    pub fn crypto_auth_hmacsha256_bytes() -> size_t;
    pub fn crypto_auth_hmacsha256_keybytes() -> size_t;
    pub fn crypto_auth_hmacsha256(a: *mut u8,
                                  m: *const u8,
                                  mlen: c_ulonglong,
                                  k: *const u8)
                                  -> c_int;
    pub fn crypto_auth_hmacsha256_verify(a: *const u8,
                                         m: *const u8,
                                         mlen: c_ulonglong,
                                         k: *const u8)
                                         -> c_int;
    pub fn crypto_auth_hmacsha256_init(state: *mut crypto_auth_hmacsha256_state,
                                       key: *const u8,
                                       keylen: size_t)
                                       -> c_int;
    pub fn crypto_auth_hmacsha256_update(state: *mut crypto_auth_hmacsha256_state,
                                         m: *const u8,
                                         mlen: c_ulonglong)
                                         -> c_int;
    pub fn crypto_auth_hmacsha256_final(state: *mut crypto_auth_hmacsha256_state,
                                        a: *mut u8)
                                        -> c_int;
}


#[test]
fn test_crypto_auth_hmacsha256_bytes() {
    assert!(unsafe { crypto_auth_hmacsha256_bytes() as usize } == crypto_auth_hmacsha256_BYTES)
}
#[test]
fn test_crypto_auth_hmacsha256_keybytes() {
    assert!(unsafe { crypto_auth_hmacsha256_keybytes() as usize } ==
            crypto_auth_hmacsha256_KEYBYTES)
}