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// crypto_box.h

pub const crypto_box_SEEDBYTES: usize = crypto_box_curve25519xsalsa20poly1305_SEEDBYTES;
pub const crypto_box_PUBLICKEYBYTES: usize = crypto_box_curve25519xsalsa20poly1305_PUBLICKEYBYTES;
pub const crypto_box_SECRETKEYBYTES: usize = crypto_box_curve25519xsalsa20poly1305_SECRETKEYBYTES;
pub const crypto_box_BEFORENMBYTES: usize = crypto_box_curve25519xsalsa20poly1305_BEFORENMBYTES;
pub const crypto_box_NONCEBYTES: usize = crypto_box_curve25519xsalsa20poly1305_NONCEBYTES;
pub const crypto_box_ZEROBYTES: usize = crypto_box_curve25519xsalsa20poly1305_ZEROBYTES;
pub const crypto_box_BOXZEROBYTES: usize = crypto_box_curve25519xsalsa20poly1305_BOXZEROBYTES;
pub const crypto_box_MACBYTES: usize = crypto_box_curve25519xsalsa20poly1305_MACBYTES;
pub const crypto_box_PRIMITIVE: &'static str = "curve25519xsalsa20poly1305";


extern {
    pub fn crypto_box_seedbytes() -> size_t;
    pub fn crypto_box_publickeybytes() -> size_t;
    pub fn crypto_box_secretkeybytes() -> size_t;
    pub fn crypto_box_beforenmbytes() -> size_t;
    pub fn crypto_box_noncebytes() -> size_t;
    pub fn crypto_box_zerobytes() -> size_t;
    pub fn crypto_box_boxzerobytes() -> size_t;
    pub fn crypto_box_macbytes() -> size_t;
    pub fn crypto_box_primitive() -> *const c_char;

    pub fn crypto_box_seed_keypair(
        pk: *mut [u8; crypto_box_PUBLICKEYBYTES],
        sk: *mut [u8; crypto_box_SECRETKEYBYTES],
        seed: *const [u8; crypto_box_SEEDBYTES])
        -> c_int;
    pub fn crypto_box_keypair(
        pk: *mut [u8; crypto_box_PUBLICKEYBYTES],
        sk: *mut [u8; crypto_box_SECRETKEYBYTES])
        -> c_int;
    pub fn crypto_box_beforenm(
        k: *mut [u8; crypto_box_BEFORENMBYTES],
        pk: *const [u8; crypto_box_PUBLICKEYBYTES],
        sk: *const [u8; crypto_box_SECRETKEYBYTES])
        -> c_int;
    pub fn crypto_box_afternm(
        c: *mut u8,
        m: *const u8,
        mlen: c_ulonglong,
        n: *const [u8; crypto_box_NONCEBYTES],
        k: *const [u8; crypto_box_BEFORENMBYTES])
        -> c_int;
    pub fn crypto_box_open_afternm(
        m: *mut u8,
        c: *const u8,
        clen: c_ulonglong,
        n: *const [u8; crypto_box_NONCEBYTES],
        k: *const [u8; crypto_box_BEFORENMBYTES])
        -> c_int;
    pub fn crypto_box(
        c: *mut u8,
        m: *const u8,
        mlen: c_ulonglong,
        n: *const [u8; crypto_box_NONCEBYTES],
        pk: *const [u8; crypto_box_PUBLICKEYBYTES],
        sk: *const [u8; crypto_box_SECRETKEYBYTES])
        -> c_int;
    pub fn crypto_box_open(
        m: *mut u8,
        c: *const u8,
        clen: c_ulonglong,
        n: *const [u8; crypto_box_NONCEBYTES],
        pk: *const [u8; crypto_box_PUBLICKEYBYTES],
        sk: *const [u8; crypto_box_SECRETKEYBYTES])
        -> c_int;
    pub fn crypto_box_easy(
        c: *mut u8,
        m: *const u8,
        mlen: c_ulonglong,
        n: *const [u8; crypto_box_NONCEBYTES],
        pk: *const [u8; crypto_box_PUBLICKEYBYTES],
        sk: *const [u8; crypto_box_SECRETKEYBYTES])
        -> c_int;
    pub fn crypto_box_open_easy(
        m: *mut u8,
        c: *const u8,
        clen: c_ulonglong,
        n: *const [u8; crypto_box_NONCEBYTES],
        pk: *const [u8; crypto_box_PUBLICKEYBYTES],
        sk: *const [u8; crypto_box_SECRETKEYBYTES])
        -> c_int;
    pub fn crypto_box_detached(
        c: *mut u8,
        mac: *mut [u8; crypto_box_MACBYTES],
        m: *const u8,
        mlen: c_ulonglong,
        n: *const [u8; crypto_box_NONCEBYTES],
        pk: *const [u8; crypto_box_PUBLICKEYBYTES],
        sk: *const [u8; crypto_box_SECRETKEYBYTES])
        -> c_int;
    pub fn crypto_box_open_detached(
        m: *mut u8,
        c: *const u8,
        mac: *const [u8; crypto_box_MACBYTES],
        clen: c_ulonglong,
        n: *const [u8; crypto_box_NONCEBYTES],
        pk: *const [u8; crypto_box_PUBLICKEYBYTES],
        sk: *const [u8; crypto_box_SECRETKEYBYTES])
        -> c_int;
}


#[test]
fn test_crypto_box_seedbytes() {
    assert!(unsafe {
        crypto_box_seedbytes() as usize
    } == crypto_box_SEEDBYTES)
}
#[test]
fn test_crypto_box_publickeybytes() {
    assert!(unsafe {
        crypto_box_publickeybytes() as usize
    } == crypto_box_PUBLICKEYBYTES)
}
#[test]
fn test_crypto_box_secretkeybytes() {
    assert!(unsafe {
        crypto_box_secretkeybytes() as usize
    } == crypto_box_SECRETKEYBYTES)
}
#[test]
fn test_crypto_box_beforenmbytes() {
    assert!(unsafe {
        crypto_box_beforenmbytes() as usize
    } == crypto_box_BEFORENMBYTES)
}
#[test]
fn test_crypto_box_noncebytes() {
    assert!(unsafe {
        crypto_box_noncebytes() as usize
    } == crypto_box_NONCEBYTES)
}
#[test]
fn test_crypto_box_zerobytes() {
    assert!(unsafe {
        crypto_box_zerobytes() as usize
    } == crypto_box_ZEROBYTES)
}
#[test]
fn test_crypto_box_boxzerobytes() {
    assert!(unsafe {
        crypto_box_boxzerobytes() as usize
    } == crypto_box_BOXZEROBYTES)
}
#[test]
fn test_crypto_box_macbytes() {
    assert!(unsafe {
        crypto_box_macbytes() as usize
    } == crypto_box_MACBYTES)
}
#[test]
fn test_crypto_box_primitive() {
    unsafe {
        let s = crypto_box_primitive();
        let s = std::ffi::CStr::from_ptr(s).to_bytes();
        assert!(s == crypto_box_PRIMITIVE.as_bytes());
    }
}