rust_sodium-sys 0.1.2

// crypto_generichash.h

pub const crypto_generichash_BYTES_MIN: usize = crypto_generichash_blake2b_BYTES_MIN;
pub const crypto_generichash_BYTES_MAX: usize = crypto_generichash_blake2b_BYTES_MAX;
pub const crypto_generichash_BYTES: usize = crypto_generichash_blake2b_BYTES;
pub const crypto_generichash_KEYBYTES_MIN: usize = crypto_generichash_blake2b_KEYBYTES_MIN;
pub const crypto_generichash_KEYBYTES_MAX: usize = crypto_generichash_blake2b_KEYBYTES_MAX;
pub const crypto_generichash_KEYBYTES: usize = crypto_generichash_blake2b_KEYBYTES;
pub const crypto_generichash_PRIMITIVE: *const c_char =
    (b"blake2b\0" as *const u8) as *const c_char;

#[allow(non_camel_case_types)]
pub enum crypto_generichash_state { }

extern "C" {
    pub fn crypto_generichash_bytes_min() -> size_t;
    pub fn crypto_generichash_bytes_max() -> size_t;
    pub fn crypto_generichash_bytes() -> size_t;
    pub fn crypto_generichash_keybytes_min() -> size_t;
    pub fn crypto_generichash_keybytes_max() -> size_t;
    pub fn crypto_generichash_keybytes() -> size_t;
    pub fn crypto_generichash_primitive() -> *const c_char;

    pub fn crypto_generichash(out: *mut u8,
                              outlen: size_t,
                              in_: *const u8,
                              inlen: c_ulonglong,
                              key: *const u8,
                              keylen: size_t)
                              -> c_int;

    pub fn crypto_generichash_init(state: *mut crypto_generichash_state,
                                   key: *const u8,
                                   keylen: size_t,
                                   outlen: size_t)
                                   -> c_int;

    pub fn crypto_generichash_update(state: *mut crypto_generichash_state,
                                     in_: *const u8,
                                     inlen: c_ulonglong)
                                     -> c_int;

    pub fn crypto_generichash_final(state: *mut crypto_generichash_state,
                                    out: *mut u8,
                                    outlen: size_t)
                                    -> c_int;

    pub fn crypto_generichash_statebytes() -> size_t;
}

#[test]
fn test_crypto_generichash_bytes_min() {
    assert_eq!(unsafe { crypto_generichash_bytes_min() as usize },
               crypto_generichash_BYTES_MIN)
}

#[test]
fn test_crypto_generichash_bytes_max() {
    assert_eq!(unsafe { crypto_generichash_bytes_max() as usize },
               crypto_generichash_BYTES_MAX)
}

#[test]
fn test_crypto_generichash_bytes() {
    assert_eq!(unsafe { crypto_generichash_bytes() as usize },
               crypto_generichash_BYTES)
}

#[test]
fn test_crypto_generichash_keybytes_min() {
    assert_eq!(unsafe { crypto_generichash_keybytes_min() as usize },
               crypto_generichash_KEYBYTES_MIN)
}

#[test]
fn test_crypto_generichash_keybytes_max() {
    assert_eq!(unsafe { crypto_generichash_keybytes_max() as usize },
               crypto_generichash_KEYBYTES_MAX)
}

#[test]
fn test_crypto_generichash_keybytes() {
    assert_eq!(unsafe { crypto_generichash_keybytes() as usize },
               crypto_generichash_KEYBYTES)
}
#[test]
fn test_crypto_generichash_primitive() {
    use std::ffi::CStr;
    unsafe {
        assert_eq!(CStr::from_ptr(crypto_generichash_PRIMITIVE),
                   CStr::from_ptr(crypto_generichash_primitive()));
    }
}

#[test]
fn test_crypto_generichash_statebytes() {
    assert!(unsafe { crypto_generichash_statebytes() } > 0);
}

#[test]
fn test_crypto_generichash() {
    let mut out = [0u8; crypto_generichash_BYTES];
    let m = [0u8; 64];
    let key = [0u8; crypto_generichash_KEYBYTES];

    assert_eq!(unsafe {
                   crypto_generichash(out.as_mut_ptr(),
                                      out.len(),
                                      m.as_ptr(),
                                      m.len() as u64,
                                      key.as_ptr(),
                                      key.len())
               },
               0);
}

#[test]
fn test_crypto_generichash_multipart() {
    use std::mem;

    let mut out = [0u8; crypto_generichash_BYTES];
    let m = [0u8; 64];
    let key = [0u8; crypto_generichash_KEYBYTES];

    let mut st = vec![0u8; (unsafe { crypto_generichash_statebytes() })];
    let pst = unsafe { mem::transmute::<*mut u8, *mut crypto_generichash_state>(st.as_mut_ptr()) };

    assert_eq!(unsafe { crypto_generichash_init(pst, key.as_ptr(), key.len(), out.len()) },
               0);

    assert_eq!(unsafe { crypto_generichash_update(pst, m.as_ptr(), m.len() as u64) },
               0);

    assert_eq!(unsafe { crypto_generichash_update(pst, m.as_ptr(), m.len() as u64) },
               0);

    assert_eq!(unsafe { crypto_generichash_final(pst, out.as_mut_ptr(), out.len()) },
               0);
}