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// crypto_generichash_blake2b.h

pub const crypto_generichash_blake2b_BYTES_MIN: usize = 16;
pub const crypto_generichash_blake2b_BYTES_MAX: usize = 64;
pub const crypto_generichash_blake2b_BYTES: usize = 32;
pub const crypto_generichash_blake2b_KEYBYTES_MIN: usize = 16;
pub const crypto_generichash_blake2b_KEYBYTES_MAX: usize = 64;
pub const crypto_generichash_blake2b_KEYBYTES: usize = 32;
pub const crypto_generichash_blake2b_SALTBYTES: usize = 16;
pub const crypto_generichash_blake2b_PERSONALBYTES: usize = 16;

#[allow(non_camel_case_types)]
pub enum crypto_generichash_blake2b_state { }

extern {
    pub fn crypto_generichash_blake2b_bytes_min() -> size_t;
    pub fn crypto_generichash_blake2b_bytes_max() -> size_t;
    pub fn crypto_generichash_blake2b_bytes() -> size_t;
    pub fn crypto_generichash_blake2b_keybytes_min() -> size_t;
    pub fn crypto_generichash_blake2b_keybytes_max() -> size_t;
    pub fn crypto_generichash_blake2b_keybytes() -> size_t;
    pub fn crypto_generichash_blake2b_saltbytes() -> size_t;
    pub fn crypto_generichash_blake2b_personalbytes() -> size_t;

    pub fn crypto_generichash_blake2b(
        out: *mut u8,
        outlen: size_t,
        in_: *const u8,
        inlen: c_ulonglong,
        key: *const u8,
        keylen: size_t)
        -> c_int;

    pub fn crypto_generichash_blake2b_salt_personal(
        out: *mut u8,
        outlen: size_t,
        in_: *const u8,
        inlen: c_ulonglong,
        key: *const u8,
        keylen: size_t,
        salt: *const [u8; crypto_generichash_blake2b_SALTBYTES],
        personal: *const [u8; crypto_generichash_blake2b_PERSONALBYTES])
        -> c_int;

    pub fn crypto_generichash_blake2b_init(
        state: *mut crypto_generichash_blake2b_state,
        key: *const u8,
        keylen: size_t,
        outlen: size_t)
        -> c_int;

    pub fn crypto_generichash_blake2b_init_salt_personal(
        state: *mut crypto_generichash_blake2b_state,
        key: *const u8,
        keylen: size_t,
        outlen: size_t,
        salt: *const [u8; crypto_generichash_blake2b_SALTBYTES],
        personal: *const [u8; crypto_generichash_blake2b_PERSONALBYTES])
        -> c_int;

    pub fn crypto_generichash_blake2b_update(
        state: *mut crypto_generichash_blake2b_state,
        in_: *const u8,
        inlen: c_ulonglong)
        -> c_int;

    pub fn crypto_generichash_blake2b_final(
        state: *mut crypto_generichash_blake2b_state,
        out: *mut u8,
        outlen: size_t)
        -> c_int;
}

#[test]
fn test_crypto_generichash_blake2b_bytes_min() {
    assert_eq!(unsafe { crypto_generichash_blake2b_bytes_min() as usize },
                        crypto_generichash_blake2b_BYTES_MIN)
}

#[test]
fn test_crypto_generichash_blake2b_bytes_max() {
    assert_eq!(unsafe { crypto_generichash_blake2b_bytes_max() as usize },
                        crypto_generichash_blake2b_BYTES_MAX)
}

#[test]
fn test_crypto_generichash_blake2b_bytes() {
    assert_eq!(unsafe { crypto_generichash_blake2b_bytes() as usize },
                        crypto_generichash_blake2b_BYTES)
}

#[test]
fn test_crypto_generichash_blake2b_keybytes_min() {
    assert_eq!(unsafe { crypto_generichash_blake2b_keybytes_min() as usize },
                        crypto_generichash_blake2b_KEYBYTES_MIN)
}

#[test]
fn test_crypto_generichash_blake2b_keybytes_max() {
    assert_eq!(unsafe { crypto_generichash_blake2b_keybytes_max() as usize },
                        crypto_generichash_blake2b_KEYBYTES_MAX)
}

#[test]
fn test_crypto_generichash_blake2b_keybytes() {
    assert_eq!(unsafe { crypto_generichash_blake2b_keybytes() as usize },
                        crypto_generichash_blake2b_KEYBYTES)
}

#[test]
fn test_crypto_generichash_blake2b_saltbytes() {
    assert_eq!(unsafe { crypto_generichash_blake2b_saltbytes() as usize },
                        crypto_generichash_blake2b_SALTBYTES)
}

#[test]
fn test_crypto_generichash_blake2b_personalbytes() {
    assert_eq!(unsafe { crypto_generichash_blake2b_personalbytes() as usize },
                        crypto_generichash_blake2b_PERSONALBYTES)
}

#[test]
fn test_crypto_generichash_blake2b() {
    let mut out = [0u8; crypto_generichash_blake2b_BYTES];
    let m = [0u8; 64];
    let key = [0u8; crypto_generichash_blake2b_KEYBYTES];

    assert_eq!(unsafe {
        crypto_generichash_blake2b(out.as_mut_ptr(), out.len(),
                           m.as_ptr(), m.len() as u64,
                           key.as_ptr(), key.len())
    }, 0);
}

#[test]
fn test_crypto_generichash_blake2b_salt_personal() {
    let mut out = [0u8; crypto_generichash_blake2b_BYTES];
    let m = [0u8; 64];
    let key = [0u8; crypto_generichash_blake2b_KEYBYTES];
    let salt = [0u8; crypto_generichash_blake2b_SALTBYTES];
    let personal = [0u8; crypto_generichash_blake2b_PERSONALBYTES];

    assert_eq!(unsafe {
        crypto_generichash_blake2b_salt_personal(out.as_mut_ptr(), out.len(),
                           m.as_ptr(), m.len() as u64,
                           key.as_ptr(), key.len(),
                           &salt, &personal)
    }, 0);
}