// crypto_pwhash_scryptsalsa208sha256.h

pub const crypto_pwhash_scryptsalsa208sha256_SALTBYTES: usize = 32;
pub const crypto_pwhash_scryptsalsa208sha256_STRBYTES: usize = 102;
pub const crypto_pwhash_scryptsalsa208sha256_STRPREFIX: &'static str = "$7$";
pub const crypto_pwhash_scryptsalsa208sha256_OPSLIMIT_INTERACTIVE: usize =
    524288;
pub const crypto_pwhash_scryptsalsa208sha256_MEMLIMIT_INTERACTIVE: usize =
    16777216;
pub const crypto_pwhash_scryptsalsa208sha256_OPSLIMIT_SENSITIVE: usize =
    33554432;
pub const crypto_pwhash_scryptsalsa208sha256_MEMLIMIT_SENSITIVE: usize =
    1073741824;


extern {
    pub fn crypto_pwhash_scryptsalsa208sha256_saltbytes() -> size_t;
    pub fn crypto_pwhash_scryptsalsa208sha256_strbytes() -> size_t;
    pub fn crypto_pwhash_scryptsalsa208sha256_strprefix() -> *const c_char;
    pub fn crypto_pwhash_scryptsalsa208sha256_opslimit_interactive() ->
        size_t;
    pub fn crypto_pwhash_scryptsalsa208sha256_memlimit_interactive() ->
        size_t;
    pub fn crypto_pwhash_scryptsalsa208sha256_opslimit_sensitive() -> size_t;
    pub fn crypto_pwhash_scryptsalsa208sha256_memlimit_sensitive() -> size_t;
    pub fn crypto_pwhash_scryptsalsa208sha256(
        out: *mut u8,
        outlen: c_ulonglong,
        passwd: *const u8,
        passwdlen: c_ulonglong,
        salt: *const [u8; crypto_pwhash_scryptsalsa208sha256_SALTBYTES],
        opslimit: c_ulonglong,
        memlimit: size_t) -> c_int;
    pub fn crypto_pwhash_scryptsalsa208sha256_str(
        out: *mut [u8; crypto_pwhash_scryptsalsa208sha256_STRBYTES],
        passwd: *const u8,
        passwdlen: c_ulonglong,
        opslimit: c_ulonglong,
        memlimit: size_t) -> c_int;
    pub fn crypto_pwhash_scryptsalsa208sha256_str_verify(
        str_: *const [u8; crypto_pwhash_scryptsalsa208sha256_STRBYTES],
        passwd: *const u8,
        passwdlen: c_ulonglong) -> c_int;
    pub fn crypto_pwhash_scryptsalsa208sha256_ll(
        passwd: *const u8,
        passwdlen: size_t,
        salt: *const u8,
        saltlen: size_t,
        N: u64,
        r: u32,
        p: u32,
        buf: *mut u8,
        buflen: size_t) -> c_int;
}


#[test]
fn test_crypto_pwhash_scryptsalsa208sha256_saltbytes() {
    assert!(unsafe {
        crypto_pwhash_scryptsalsa208sha256_saltbytes() as usize
    } == crypto_pwhash_scryptsalsa208sha256_SALTBYTES)
}
#[test]
fn test_crypto_pwhash_scryptsalsa208sha256_strbytes() {
    assert!(unsafe {
        crypto_pwhash_scryptsalsa208sha256_strbytes() as usize
    } == crypto_pwhash_scryptsalsa208sha256_STRBYTES)
}
#[test]
fn test_crypto_pwhash_scryptsalsa208sha256_opslimit_interactive() {
    assert!(unsafe {
        crypto_pwhash_scryptsalsa208sha256_opslimit_interactive() as usize
    } == crypto_pwhash_scryptsalsa208sha256_OPSLIMIT_INTERACTIVE)
}
#[test]
fn test_crypto_pwhash_scryptsalsa208sha256_memlimit_interactive() {
    assert!(unsafe {
        crypto_pwhash_scryptsalsa208sha256_memlimit_interactive() as usize
    } == crypto_pwhash_scryptsalsa208sha256_MEMLIMIT_INTERACTIVE)
}
#[test]
fn test_crypto_pwhash_scryptsalsa208sha256_opslimit_sensitive() {
    assert!(unsafe {
        crypto_pwhash_scryptsalsa208sha256_opslimit_sensitive() as usize
    } == crypto_pwhash_scryptsalsa208sha256_OPSLIMIT_SENSITIVE)
}
#[test]
fn test_crypto_pwhash_scryptsalsa208sha256_memlimit_sensitive() {
    assert!(unsafe {
        crypto_pwhash_scryptsalsa208sha256_memlimit_sensitive() as usize
    } == crypto_pwhash_scryptsalsa208sha256_MEMLIMIT_SENSITIVE)
}
#[test]
fn test_crypto_pwhash_scryptsalsa208sha256_strprefix() {
    unsafe {
         let s = crypto_pwhash_scryptsalsa208sha256_strprefix();
         let s = std::ffi::CStr::from_ptr(s).to_bytes();
        assert!(s ==
                crypto_pwhash_scryptsalsa208sha256_STRPREFIX.as_bytes());
    }
}
#[test]
fn test_crypto_pwhash_scryptsalsa208sha256_str() {
    let password = "Correct Horse Battery Staple";
    let mut hashed_password =
        [0; crypto_pwhash_scryptsalsa208sha256_STRBYTES];
    let ret_hash = unsafe {
        crypto_pwhash_scryptsalsa208sha256_str(
            &mut hashed_password,
            password.as_ptr(),
            password.len() as c_ulonglong,
            crypto_pwhash_scryptsalsa208sha256_OPSLIMIT_INTERACTIVE
                as c_ulonglong,
            crypto_pwhash_scryptsalsa208sha256_MEMLIMIT_INTERACTIVE
                as size_t)
    };
    assert!(ret_hash == 0);
    let ret_verify = unsafe {
        crypto_pwhash_scryptsalsa208sha256_str_verify(
            &hashed_password,
            password.as_ptr(),
            password.len() as c_ulonglong)
    };
    assert!(ret_verify == 0);
}
#[test]
fn test_crypto_pwhash_scryptsalsa208sha256_ll_1() {
    // See https://www.tarsnap.com/scrypt/scrypt.pdf Page 16
    let password = "";
    let salt = "";
    let n = 16;
    let r = 1;
    let p = 1;
    let mut buf = [0u8; 64];
    let expected = [0x77, 0xd6, 0x57, 0x62, 0x38, 0x65, 0x7b, 0x20,
                    0x3b, 0x19, 0xca, 0x42, 0xc1, 0x8a, 0x04, 0x97,
                    0xf1, 0x6b, 0x48, 0x44, 0xe3, 0x07, 0x4a, 0xe8,
                    0xdf, 0xdf, 0xfa, 0x3f, 0xed, 0xe2, 0x14, 0x42,
                    0xfc, 0xd0, 0x06, 0x9d, 0xed, 0x09, 0x48, 0xf8,
                    0x32, 0x6a, 0x75, 0x3a, 0x0f, 0xc8, 0x1f, 0x17,
                    0xe8, 0xd3, 0xe0, 0xfb, 0x2e, 0x0d, 0x36, 0x28,
                    0xcf, 0x35, 0xe2, 0x0c, 0x38, 0xd1, 0x89, 0x06];
    let ret = unsafe {
        crypto_pwhash_scryptsalsa208sha256_ll(password.as_ptr(),
                                              password.len() as size_t,
                                              salt.as_ptr(),
                                              salt.len() as size_t,
                                              n,
                                              r,
                                              p,
                                              buf.as_mut_ptr(),
                                              buf.len() as size_t)
    };
    assert!(ret == 0);
    assert!(buf[0..] == expected[0..]);
}
#[test]
fn test_crypto_pwhash_scryptsalsa208sha256_ll_2() {
    // See https://www.tarsnap.com/scrypt/scrypt.pdf Page 16
    let password = "password";
    let salt = "NaCl";
    let n = 1024;
    let r = 8;
    let p = 16;
    let mut buf = [0u8; 64];
    let expected = [0xfd, 0xba, 0xbe, 0x1c, 0x9d, 0x34, 0x72, 0x00,
                    0x78, 0x56, 0xe7, 0x19, 0x0d, 0x01, 0xe9, 0xfe,
                    0x7c, 0x6a, 0xd7, 0xcb, 0xc8, 0x23, 0x78, 0x30,
                    0xe7, 0x73, 0x76, 0x63, 0x4b, 0x37, 0x31, 0x62,
                    0x2e, 0xaf, 0x30, 0xd9, 0x2e, 0x22, 0xa3, 0x88,
                    0x6f, 0xf1, 0x09, 0x27, 0x9d, 0x98, 0x30, 0xda,
                    0xc7, 0x27, 0xaf, 0xb9, 0x4a, 0x83, 0xee, 0x6d,
                    0x83, 0x60, 0xcb, 0xdf, 0xa2, 0xcc, 0x06, 0x40];
    let ret = unsafe {
        crypto_pwhash_scryptsalsa208sha256_ll(password.as_ptr(),
                                              password.len() as size_t,
                                              salt.as_ptr(),
                                              salt.len() as size_t,
                                              n,
                                              r,
                                              p,
                                              buf.as_mut_ptr(),
                                              buf.len() as size_t)
    };
    assert!(ret == 0);
    assert!(buf[0..] == expected[0..]);
}
#[test]
fn test_crypto_pwhash_scryptsalsa208sha256_ll_3() {
    // See https://www.tarsnap.com/scrypt/scrypt.pdf Page 16
    let password = "pleaseletmein";
    let salt = "SodiumChloride";
    let n = 16384;
    let r = 8;
    let p = 1;
    let mut buf = [0u8; 64];
    let expected = [0x70, 0x23, 0xbd, 0xcb, 0x3a, 0xfd, 0x73, 0x48,
                    0x46, 0x1c, 0x06, 0xcd, 0x81, 0xfd, 0x38, 0xeb,
                    0xfd, 0xa8, 0xfb, 0xba, 0x90, 0x4f, 0x8e, 0x3e,
                    0xa9, 0xb5, 0x43, 0xf6, 0x54, 0x5d, 0xa1, 0xf2,
                    0xd5, 0x43, 0x29, 0x55, 0x61, 0x3f, 0x0f, 0xcf,
                    0x62, 0xd4, 0x97, 0x05, 0x24, 0x2a, 0x9a, 0xf9,
                    0xe6, 0x1e, 0x85, 0xdc, 0x0d, 0x65, 0x1e, 0x40,
                    0xdf, 0xcf, 0x01, 0x7b, 0x45, 0x57, 0x58, 0x87];
    let ret = unsafe {
        crypto_pwhash_scryptsalsa208sha256_ll(password.as_ptr(),
                                              password.len() as size_t,
                                              salt.as_ptr(),
                                              salt.len() as size_t,
                                              n,
                                              r,
                                              p,
                                              buf.as_mut_ptr(),
                                              buf.len() as size_t)
    };
    assert!(ret == 0);
    assert!(buf[0..] == expected[0..]);
}
#[test]
fn test_crypto_pwhash_scryptsalsa208sha256_ll_4() {
    // See https://www.tarsnap.com/scrypt/scrypt.pdf Page 16
    let password = "pleaseletmein";
    let salt = "SodiumChloride";
    let n = 1048576;
    let r = 8;
    let p = 1;
    let mut buf = [0u8; 64];
    let expected = [0x21, 0x01, 0xcb, 0x9b, 0x6a, 0x51, 0x1a, 0xae,
                    0xad, 0xdb, 0xbe, 0x09, 0xcf, 0x70, 0xf8, 0x81,
                    0xec, 0x56, 0x8d, 0x57, 0x4a, 0x2f, 0xfd, 0x4d,
                    0xab, 0xe5, 0xee, 0x98, 0x20, 0xad, 0xaa, 0x47,
                    0x8e, 0x56, 0xfd, 0x8f, 0x4b, 0xa5, 0xd0, 0x9f,
                    0xfa, 0x1c, 0x6d, 0x92, 0x7c, 0x40, 0xf4, 0xc3,
                    0x37, 0x30, 0x40, 0x49, 0xe8, 0xa9, 0x52, 0xfb,
                    0xcb, 0xf4, 0x5c, 0x6f, 0xa7, 0x7a, 0x41, 0xa4];
    let ret = unsafe {
        crypto_pwhash_scryptsalsa208sha256_ll(password.as_ptr(),
                                              password.len() as size_t,
                                              salt.as_ptr(),
                                              salt.len() as size_t,
                                              n,
                                              r,
                                              p,
                                              buf.as_mut_ptr(),
                                              buf.len() as size_t)
    };
    assert!(ret == 0);
    assert!(buf[0..] == expected[0..]);
}
