# ===================================================================
#
# Copyright (c) 2015, Legrandin <helderijs@gmail.com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in
#    the documentation and/or other materials provided with the
#    distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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import os
import errno
import warnings
import unittest
from binascii import unhexlify

from Cryptodome.SelfTest.st_common import list_test_cases
from Cryptodome.Util.py3compat import bord, tostr, FileNotFoundError
from Cryptodome.Util.asn1 import DerSequence, DerBitString
from Cryptodome.Util.number import bytes_to_long
from Cryptodome.Hash import SHAKE128

from Cryptodome.PublicKey import ECC

try:
    import pycryptodome_test_vectors  # type: ignore
    test_vectors_available = True
except ImportError:
    test_vectors_available = False


class MissingTestVectorException(ValueError):
    pass


def load_file(file_name, mode="rb"):
    results = None

    try:
        if not test_vectors_available:
            raise FileNotFoundError(errno.ENOENT,
                                    os.strerror(errno.ENOENT),
                                    file_name)

        dir_comps = ("PublicKey", "ECC")
        init_dir = os.path.dirname(pycryptodome_test_vectors.__file__)
        full_file_name = os.path.join(os.path.join(init_dir, *dir_comps), file_name)
        with open(full_file_name, mode) as file_in:
            results = file_in.read()

    except FileNotFoundError:
        warnings.warn("Warning: skipping extended tests for ECC",
                      UserWarning,
                      stacklevel=2)

    if results is None:
        raise MissingTestVectorException("Missing %s" % file_name)

    return results


def compact(lines):
    ext = b"".join(lines)
    return unhexlify(tostr(ext).replace(" ", "").replace(":", ""))


def create_ref_keys_p256():
    key_len = 32
    key_lines = load_file("ecc_p256.txt").splitlines()
    private_key_d = bytes_to_long(compact(key_lines[2:5]))
    public_key_xy = compact(key_lines[6:11])
    assert bord(public_key_xy[0]) == 4  # Uncompressed
    public_key_x = bytes_to_long(public_key_xy[1:key_len+1])
    public_key_y = bytes_to_long(public_key_xy[key_len+1:])

    return (ECC.construct(curve="P-256", d=private_key_d),
            ECC.construct(curve="P-256", point_x=public_key_x, point_y=public_key_y))

def create_ref_keys_p384():
    key_len = 48
    key_lines = load_file("ecc_p384.txt").splitlines()
    private_key_d = bytes_to_long(compact(key_lines[2:6]))
    public_key_xy = compact(key_lines[7:14])
    assert bord(public_key_xy[0]) == 4  # Uncompressed
    public_key_x = bytes_to_long(public_key_xy[1:key_len+1])
    public_key_y = bytes_to_long(public_key_xy[key_len+1:])

    return (ECC.construct(curve="P-384", d=private_key_d),
            ECC.construct(curve="P-384", point_x=public_key_x, point_y=public_key_y))

def create_ref_keys_p521():
    key_len = 66
    key_lines = load_file("ecc_p521.txt").splitlines()
    private_key_d = bytes_to_long(compact(key_lines[2:7]))
    public_key_xy = compact(key_lines[8:17])
    assert bord(public_key_xy[0]) == 4  # Uncompressed
    public_key_x = bytes_to_long(public_key_xy[1:key_len+1])
    public_key_y = bytes_to_long(public_key_xy[key_len+1:])

    return (ECC.construct(curve="P-521", d=private_key_d),
            ECC.construct(curve="P-521", point_x=public_key_x, point_y=public_key_y))

# Create reference key pair
# ref_private, ref_public = create_ref_keys_p521()

def get_fixed_prng():
    return SHAKE128.new().update(b"SEED").read


def extract_bitstring_from_spki(data):
        seq = DerSequence()
        seq.decode(data)
        bs = DerBitString()
        bs.decode(seq[1])
        return bs.value


class TestImport(unittest.TestCase):

    def test_empty(self):
        self.assertRaises(ValueError, ECC.import_key, b"")


class TestImport_P256(unittest.TestCase):

    def __init__(self, *args, **kwargs):
        super(TestImport_P256, self).__init__(*args, **kwargs)
        self.ref_private, self.ref_public = create_ref_keys_p256()

    def test_import_public_der(self):
        key_file = load_file("ecc_p256_public.der")

        key = ECC._import_subjectPublicKeyInfo(key_file)
        self.assertEqual(self.ref_public, key)

        key = ECC._import_der(key_file, None)
        self.assertEqual(self.ref_public, key)

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_public, key)

    def test_import_sec1_uncompressed(self):
        key_file = load_file("ecc_p256_public.der")
        value = extract_bitstring_from_spki(key_file)
        key = ECC.import_key(key_file, curve_name='P256')
        self.assertEqual(self.ref_public, key)

    def test_import_sec1_compressed(self):
        key_file = load_file("ecc_p256_public_compressed.der")
        value = extract_bitstring_from_spki(key_file)
        key = ECC.import_key(key_file, curve_name='P256')
        self.assertEqual(self.ref_public, key)

    def test_import_private_der(self):
        key_file = load_file("ecc_p256_private.der")

        key = ECC._import_private_der(key_file, None)
        self.assertEqual(self.ref_private, key)

        key = ECC._import_der(key_file, None)
        self.assertEqual(self.ref_private, key)

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_private, key)

    def test_import_private_pkcs8_clear(self):
        key_file = load_file("ecc_p256_private_p8_clear.der")

        key = ECC._import_der(key_file, None)
        self.assertEqual(self.ref_private, key)

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_private, key)

    def test_import_private_pkcs8_in_pem_clear(self):
        key_file = load_file("ecc_p256_private_p8_clear.pem")

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_private, key)

    def test_import_private_pkcs8_encrypted_1(self):
        key_file = load_file("ecc_p256_private_p8.der")

        key = ECC._import_der(key_file, "secret")
        self.assertEqual(self.ref_private, key)

        key = ECC.import_key(key_file, "secret")
        self.assertEqual(self.ref_private, key)

    def test_import_private_pkcs8_encrypted_2(self):
        key_file = load_file("ecc_p256_private_p8.pem")

        key = ECC.import_key(key_file, "secret")
        self.assertEqual(self.ref_private, key)

    def test_import_x509_der(self):
        key_file = load_file("ecc_p256_x509.der")

        key = ECC._import_der(key_file, None)
        self.assertEqual(self.ref_public, key)

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_public, key)

    def test_import_public_pem(self):
        key_file = load_file("ecc_p256_public.pem")

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_public, key)

    def test_import_private_pem(self):
        key_file = load_file("ecc_p256_private.pem")

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_private, key)

    def test_import_private_pem_with_ecparams(self):
        key_file = load_file("ecc_p256_private_ecparams.pem")
        key = ECC.import_key(key_file)
        # We just check if the import succeeds

    def test_import_private_pem_encrypted(self):
        for algo in "des3", "aes128", "aes192", "aes256", "aes256_gcm":
            key_file = load_file("ecc_p256_private_enc_%s.pem" % algo)

            key = ECC.import_key(key_file, "secret")
            self.assertEqual(self.ref_private, key)

            key = ECC.import_key(tostr(key_file), b"secret")
            self.assertEqual(self.ref_private, key)

    def test_import_x509_pem(self):
        key_file = load_file("ecc_p256_x509.pem")

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_public, key)

    def test_import_openssh_public(self):
        key_file = load_file("ecc_p256_public_openssh.txt")

        key = ECC._import_openssh_public(key_file)
        self.assertEqual(self.ref_public, key)

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_public, key)

    def test_import_openssh_private_clear(self):
        key_file = load_file("ecc_p256_private_openssh.pem")
        key_file_old = load_file("ecc_p256_private_openssh_old.pem")

        key = ECC.import_key(key_file)
        key_old = ECC.import_key(key_file_old)
        self.assertEqual(key, key_old)

    def test_import_openssh_private_password(self):
        key_file = load_file("ecc_p256_private_openssh_pwd.pem")
        key_file_old = load_file("ecc_p256_private_openssh_pwd_old.pem")

        key = ECC.import_key(key_file, b"password")
        key_old = ECC.import_key(key_file_old)
        self.assertEqual(key, key_old)


class TestImport_P384(unittest.TestCase):

    def __init__(self, *args, **kwargs):
        super(TestImport_P384, self).__init__(*args, **kwargs)
        self.ref_private, self.ref_public = create_ref_keys_p384()

    def test_import_public_der(self):
        key_file = load_file("ecc_p384_public.der")

        key = ECC._import_subjectPublicKeyInfo(key_file)
        self.assertEqual(self.ref_public, key)

        key = ECC._import_der(key_file, None)
        self.assertEqual(self.ref_public, key)

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_public, key)

    def test_import_sec1_uncompressed(self):
        key_file = load_file("ecc_p384_public.der")
        value = extract_bitstring_from_spki(key_file)
        key = ECC.import_key(key_file, curve_name='P384')
        self.assertEqual(self.ref_public, key)

    def test_import_sec1_compressed(self):
        key_file = load_file("ecc_p384_public_compressed.der")
        value = extract_bitstring_from_spki(key_file)
        key = ECC.import_key(key_file, curve_name='P384')
        self.assertEqual(self.ref_public, key)

    def test_import_private_der(self):
        key_file = load_file("ecc_p384_private.der")

        key = ECC._import_private_der(key_file, None)
        self.assertEqual(self.ref_private, key)

        key = ECC._import_der(key_file, None)
        self.assertEqual(self.ref_private, key)

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_private, key)

    def test_import_private_pkcs8_clear(self):
        key_file = load_file("ecc_p384_private_p8_clear.der")

        key = ECC._import_der(key_file, None)
        self.assertEqual(self.ref_private, key)

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_private, key)

    def test_import_private_pkcs8_in_pem_clear(self):
        key_file = load_file("ecc_p384_private_p8_clear.pem")

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_private, key)

    def test_import_private_pkcs8_encrypted_1(self):
        key_file = load_file("ecc_p384_private_p8.der")

        key = ECC._import_der(key_file, "secret")
        self.assertEqual(self.ref_private, key)

        key = ECC.import_key(key_file, "secret")
        self.assertEqual(self.ref_private, key)

    def test_import_private_pkcs8_encrypted_2(self):
        key_file = load_file("ecc_p384_private_p8.pem")

        key = ECC.import_key(key_file, "secret")
        self.assertEqual(self.ref_private, key)

    def test_import_x509_der(self):
        key_file = load_file("ecc_p384_x509.der")

        key = ECC._import_der(key_file, None)
        self.assertEqual(self.ref_public, key)

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_public, key)

    def test_import_public_pem(self):
        key_file = load_file("ecc_p384_public.pem")

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_public, key)

    def test_import_private_pem(self):
        key_file = load_file("ecc_p384_private.pem")

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_private, key)

    def test_import_private_pem_encrypted(self):
        for algo in "des3", "aes128", "aes192", "aes256", "aes256_gcm":
            key_file = load_file("ecc_p384_private_enc_%s.pem" % algo)

            key = ECC.import_key(key_file, "secret")
            self.assertEqual(self.ref_private, key)

            key = ECC.import_key(tostr(key_file), b"secret")
            self.assertEqual(self.ref_private, key)

    def test_import_x509_pem(self):
        key_file = load_file("ecc_p384_x509.pem")

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_public, key)

    def test_import_openssh_public(self):
        key_file = load_file("ecc_p384_public_openssh.txt")

        key = ECC._import_openssh_public(key_file)
        self.assertEqual(self.ref_public, key)

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_public, key)

    def test_import_openssh_private_clear(self):
        key_file = load_file("ecc_p384_private_openssh.pem")
        key_file_old = load_file("ecc_p384_private_openssh_old.pem")

        key = ECC.import_key(key_file)
        key_old = ECC.import_key(key_file_old)
        self.assertEqual(key, key_old)

    def test_import_openssh_private_password(self):
        key_file = load_file("ecc_p384_private_openssh_pwd.pem")
        key_file_old = load_file("ecc_p384_private_openssh_pwd_old.pem")

        key = ECC.import_key(key_file, b"password")
        key_old = ECC.import_key(key_file_old)
        self.assertEqual(key, key_old)


class TestImport_P521(unittest.TestCase):

    def __init__(self, *args, **kwargs):
        super(TestImport_P521, self).__init__(*args, **kwargs)
        self.ref_private, self.ref_public = create_ref_keys_p521()

    def test_import_public_der(self):
        key_file = load_file("ecc_p521_public.der")

        key = ECC._import_subjectPublicKeyInfo(key_file)
        self.assertEqual(self.ref_public, key)

        key = ECC._import_der(key_file, None)
        self.assertEqual(self.ref_public, key)

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_public, key)

    def test_import_sec1_uncompressed(self):
        key_file = load_file("ecc_p521_public.der")
        value = extract_bitstring_from_spki(key_file)
        key = ECC.import_key(key_file, curve_name='P521')
        self.assertEqual(self.ref_public, key)

    def test_import_sec1_compressed(self):
        key_file = load_file("ecc_p521_public_compressed.der")
        value = extract_bitstring_from_spki(key_file)
        key = ECC.import_key(key_file, curve_name='P521')
        self.assertEqual(self.ref_public, key)

    def test_import_private_der(self):
        key_file = load_file("ecc_p521_private.der")

        key = ECC._import_private_der(key_file, None)
        self.assertEqual(self.ref_private, key)

        key = ECC._import_der(key_file, None)
        self.assertEqual(self.ref_private, key)

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_private, key)

    def test_import_private_pkcs8_clear(self):
        key_file = load_file("ecc_p521_private_p8_clear.der")

        key = ECC._import_der(key_file, None)
        self.assertEqual(self.ref_private, key)

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_private, key)

    def test_import_private_pkcs8_in_pem_clear(self):
        key_file = load_file("ecc_p521_private_p8_clear.pem")

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_private, key)

    def test_import_private_pkcs8_encrypted_1(self):
        key_file = load_file("ecc_p521_private_p8.der")

        key = ECC._import_der(key_file, "secret")
        self.assertEqual(self.ref_private, key)

        key = ECC.import_key(key_file, "secret")
        self.assertEqual(self.ref_private, key)

    def test_import_private_pkcs8_encrypted_2(self):
        key_file = load_file("ecc_p521_private_p8.pem")

        key = ECC.import_key(key_file, "secret")
        self.assertEqual(self.ref_private, key)

    def test_import_x509_der(self):
        key_file = load_file("ecc_p521_x509.der")

        key = ECC._import_der(key_file, None)
        self.assertEqual(self.ref_public, key)

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_public, key)

    def test_import_public_pem(self):
        key_file = load_file("ecc_p521_public.pem")

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_public, key)

    def test_import_private_pem(self):
        key_file = load_file("ecc_p521_private.pem")

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_private, key)

    def test_import_private_pem_encrypted(self):
        for algo in "des3", "aes128", "aes192", "aes256", "aes256_gcm":
            key_file = load_file("ecc_p521_private_enc_%s.pem" % algo)

            key = ECC.import_key(key_file, "secret")
            self.assertEqual(self.ref_private, key)

            key = ECC.import_key(tostr(key_file), b"secret")
            self.assertEqual(self.ref_private, key)

    def test_import_x509_pem(self):
        key_file = load_file("ecc_p521_x509.pem")

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_public, key)

    def test_import_openssh_public(self):
        key_file = load_file("ecc_p521_public_openssh.txt")

        key = ECC._import_openssh_public(key_file)
        self.assertEqual(self.ref_public, key)

        key = ECC.import_key(key_file)
        self.assertEqual(self.ref_public, key)

    def test_import_openssh_private_clear(self):
        key_file = load_file("ecc_p521_private_openssh.pem")
        key_file_old = load_file("ecc_p521_private_openssh_old.pem")

        key = ECC.import_key(key_file)
        key_old = ECC.import_key(key_file_old)
        self.assertEqual(key, key_old)

    def test_import_openssh_private_password(self):
        key_file = load_file("ecc_p521_private_openssh_pwd.pem")
        key_file_old = load_file("ecc_p521_private_openssh_pwd_old.pem")

        key = ECC.import_key(key_file, b"password")
        key_old = ECC.import_key(key_file_old)
        self.assertEqual(key, key_old)


class TestExport_P256(unittest.TestCase):

    def __init__(self, *args, **kwargs):
        super(TestExport_P256, self).__init__(*args, **kwargs)
        self.ref_private, self.ref_public = create_ref_keys_p256()

    def test_export_public_der_uncompressed(self):
        key_file = load_file("ecc_p256_public.der")

        encoded = self.ref_public._export_subjectPublicKeyInfo(False)
        self.assertEqual(key_file, encoded)

        encoded = self.ref_public.export_key(format="DER")
        self.assertEqual(key_file, encoded)

        encoded = self.ref_public.export_key(format="DER", compress=False)
        self.assertEqual(key_file, encoded)

    def test_export_public_der_compressed(self):
        key_file = load_file("ecc_p256_public.der")
        pub_key = ECC.import_key(key_file)
        key_file_compressed = pub_key.export_key(format="DER", compress=True)

        key_file_compressed_ref = load_file("ecc_p256_public_compressed.der")
        self.assertEqual(key_file_compressed, key_file_compressed_ref)

    def test_export_public_sec1_uncompressed(self):
        key_file = load_file("ecc_p256_public.der")
        value = extract_bitstring_from_spki(key_file)

        encoded = self.ref_public.export_key(format="SEC1")
        self.assertEqual(value, encoded)

    def test_export_public_sec1_compressed(self):
        key_file = load_file("ecc_p256_public.der")
        encoded = self.ref_public.export_key(format="SEC1", compress=True)

        key_file_compressed_ref = load_file("ecc_p256_public_compressed.der")
        value = extract_bitstring_from_spki(key_file_compressed_ref)
        self.assertEqual(value, encoded)

    def test_export_private_der(self):
        key_file = load_file("ecc_p256_private.der")

        encoded = self.ref_private._export_private_der()
        self.assertEqual(key_file, encoded)

        # ---

        encoded = self.ref_private.export_key(format="DER", use_pkcs8=False)
        self.assertEqual(key_file, encoded)

    def test_export_private_pkcs8_clear(self):
        key_file = load_file("ecc_p256_private_p8_clear.der")

        encoded = self.ref_private._export_pkcs8()
        self.assertEqual(key_file, encoded)

        # ---

        encoded = self.ref_private.export_key(format="DER")
        self.assertEqual(key_file, encoded)

    def test_export_private_pkcs8_encrypted(self):
        encoded = self.ref_private._export_pkcs8(passphrase="secret",
                                                    protection="PBKDF2WithHMAC-SHA1AndAES128-CBC")

        # This should prove that the output is password-protected
        self.assertRaises(ValueError, ECC._import_pkcs8, encoded, None)

        decoded = ECC._import_pkcs8(encoded, "secret")
        self.assertEqual(self.ref_private, decoded)

        # ---

        encoded = self.ref_private.export_key(format="DER",
                                                passphrase="secret",
                                                protection="PBKDF2WithHMAC-SHA1AndAES128-CBC")
        decoded = ECC.import_key(encoded, "secret")
        self.assertEqual(self.ref_private, decoded)

    def test_export_public_pem_uncompressed(self):
        key_file = load_file("ecc_p256_public.pem", "rt").strip()

        encoded = self.ref_private._export_public_pem(False)
        self.assertEqual(key_file, encoded)

        # ---

        encoded = self.ref_public.export_key(format="PEM")
        self.assertEqual(key_file, encoded)

        encoded = self.ref_public.export_key(format="PEM", compress=False)
        self.assertEqual(key_file, encoded)

    def test_export_public_pem_compressed(self):
        key_file = load_file("ecc_p256_public.pem", "rt").strip()
        pub_key = ECC.import_key(key_file)

        key_file_compressed = pub_key.export_key(format="PEM", compress=True)
        key_file_compressed_ref = load_file("ecc_p256_public_compressed.pem", "rt").strip()

        self.assertEqual(key_file_compressed, key_file_compressed_ref)

    def test_export_private_pem_clear(self):
        key_file = load_file("ecc_p256_private.pem", "rt").strip()

        encoded = self.ref_private._export_private_pem(None)
        self.assertEqual(key_file, encoded)

        # ---

        encoded = self.ref_private.export_key(format="PEM", use_pkcs8=False)
        self.assertEqual(key_file, encoded)

    def test_export_private_pem_encrypted(self):
        encoded = self.ref_private._export_private_pem(passphrase=b"secret")

        # This should prove that the output is password-protected
        self.assertRaises(ValueError, ECC.import_key, encoded)

        assert "EC PRIVATE KEY" in encoded

        decoded = ECC.import_key(encoded, "secret")
        self.assertEqual(self.ref_private, decoded)

        # ---

        encoded = self.ref_private.export_key(format="PEM",
                                         passphrase="secret",
                                         use_pkcs8=False)
        decoded = ECC.import_key(encoded, "secret")
        self.assertEqual(self.ref_private, decoded)

    def test_export_private_pkcs8_and_pem_1(self):
        # PKCS8 inside PEM with both unencrypted
        key_file = load_file("ecc_p256_private_p8_clear.pem", "rt").strip()

        encoded = self.ref_private._export_private_clear_pkcs8_in_clear_pem()
        self.assertEqual(key_file, encoded)

        # ---

        encoded = self.ref_private.export_key(format="PEM")
        self.assertEqual(key_file, encoded)

    def test_export_private_pkcs8_and_pem_2(self):
        # PKCS8 inside PEM with PKCS8 encryption
        encoded = self.ref_private._export_private_encrypted_pkcs8_in_clear_pem("secret",
                              protection="PBKDF2WithHMAC-SHA1AndAES128-CBC")

        # This should prove that the output is password-protected
        self.assertRaises(ValueError, ECC.import_key, encoded)

        assert "ENCRYPTED PRIVATE KEY" in encoded

        decoded = ECC.import_key(encoded, "secret")
        self.assertEqual(self.ref_private, decoded)

        # ---

        encoded = self.ref_private.export_key(format="PEM",
                                         passphrase="secret",
                                         protection="PBKDF2WithHMAC-SHA1AndAES128-CBC")
        decoded = ECC.import_key(encoded, "secret")
        self.assertEqual(self.ref_private, decoded)

    def test_export_openssh_uncompressed(self):
        key_file = load_file("ecc_p256_public_openssh.txt", "rt")

        encoded = self.ref_public._export_openssh(False)
        self.assertEqual(key_file, encoded)

        # ---

        encoded = self.ref_public.export_key(format="OpenSSH")
        self.assertEqual(key_file, encoded)

        encoded = self.ref_public.export_key(format="OpenSSH", compress=False)
        self.assertEqual(key_file, encoded)

    def test_export_openssh_compressed(self):
        key_file = load_file("ecc_p256_public_openssh.txt", "rt")
        pub_key = ECC.import_key(key_file)

        key_file_compressed = pub_key.export_key(format="OpenSSH", compress=True)
        assert len(key_file) > len(key_file_compressed)
        self.assertEqual(pub_key, ECC.import_key(key_file_compressed))

    def test_prng(self):
        # Test that password-protected containers use the provided PRNG
        encoded1 = self.ref_private.export_key(format="PEM",
                                          passphrase="secret",
                                          protection="PBKDF2WithHMAC-SHA1AndAES128-CBC",
                                          randfunc=get_fixed_prng())
        encoded2 = self.ref_private.export_key(format="PEM",
                                          passphrase="secret",
                                          protection="PBKDF2WithHMAC-SHA1AndAES128-CBC",
                                          randfunc=get_fixed_prng())
        self.assertEqual(encoded1, encoded2)

        # ---

        encoded1 = self.ref_private.export_key(format="PEM",
                                          use_pkcs8=False,
                                          passphrase="secret",
                                          randfunc=get_fixed_prng())
        encoded2 = self.ref_private.export_key(format="PEM",
                                          use_pkcs8=False,
                                          passphrase="secret",
                                          randfunc=get_fixed_prng())
        self.assertEqual(encoded1, encoded2)

    def test_byte_or_string_passphrase(self):
        encoded1 = self.ref_private.export_key(format="PEM",
                                          use_pkcs8=False,
                                          passphrase="secret",
                                          randfunc=get_fixed_prng())
        encoded2 = self.ref_private.export_key(format="PEM",
                                          use_pkcs8=False,
                                          passphrase=b"secret",
                                          randfunc=get_fixed_prng())
        self.assertEqual(encoded1, encoded2)

    def test_error_params1(self):
        # Unknown format
        self.assertRaises(ValueError, self.ref_private.export_key, format="XXX")

        # Missing 'protection' parameter when PKCS#8 is used
        self.ref_private.export_key(format="PEM", passphrase="secret",
                               use_pkcs8=False)
        self.assertRaises(ValueError, self.ref_private.export_key, format="PEM",
                                      passphrase="secret")

        # DER format but no PKCS#8
        self.assertRaises(ValueError, self.ref_private.export_key, format="DER",
                                      passphrase="secret",
                                      use_pkcs8=False,
                                      protection="PBKDF2WithHMAC-SHA1AndAES128-CBC")

        # Incorrect parameters for public keys
        self.assertRaises(ValueError, self.ref_public.export_key, format="DER",
                          use_pkcs8=False)

        # Empty password
        self.assertRaises(ValueError, self.ref_private.export_key, format="PEM",
                                      passphrase="", use_pkcs8=False)
        self.assertRaises(ValueError, self.ref_private.export_key, format="PEM",
                                      passphrase="",
                                      protection="PBKDF2WithHMAC-SHA1AndAES128-CBC")

        # No private keys with OpenSSH
        self.assertRaises(ValueError, self.ref_private.export_key, format="OpenSSH",
                                      passphrase="secret")

    def test_unsupported_curve(self):

        # openssl ecparam -name secp224r1 -genkey -noout -out strange-curve.pem -conv_form uncompressed
        curve = """-----BEGIN EC PRIVATE KEY-----
MGgCAQEEHEi7xTHW+5oT8wgpjoEKV7uwMuY8rt2YUZe4j1SgBwYFK4EEACGhPAM6
AATJgfOG+Bnki8robpNM8MtArji43GU9up4B0x9sVhqB+fZP+hXgV9ITN7YX4E/k
gVnJp9EBND/tHQ==
-----END EC PRIVATE KEY-----"""

        from Cryptodome.PublicKey.ECC import UnsupportedEccFeature
        try:
            ECC.import_key(curve)
        except UnsupportedEccFeature as uef:
            assert("1.3.132.0.33" in str(uef))
        else:
            assert(False)

    def test_compressed_curve(self):

        # Compressed P-256 curve (Y-point is even)
        pem1 = """-----BEGIN EC PRIVATE KEY-----
        MFcCAQEEIHTuc09jC51xXomV6MVCDN+DpAAvSmaJWZPTEHM6D5H1oAoGCCqGSM49
        AwEHoSQDIgACWFuGbHe8yJ43rir7PMTE9w8vHz0BSpXHq90Xi7/s+a0=
        -----END EC PRIVATE KEY-----"""

        # Compressed P-256 curve (Y-point is odd)
        pem2 = """-----BEGIN EC PRIVATE KEY-----
        MFcCAQEEIFggiPN9SQP+FAPTCPp08fRUz7rHp2qNBRcBJ1DXhb3ZoAoGCCqGSM49
        AwEHoSQDIgADLpph1trTIlVfa8NJvlMUPyWvL+wP+pW3BJITUL/wj9A=
        -----END EC PRIVATE KEY-----"""

        key1 = ECC.import_key(pem1)
        low16 = int(key1.pointQ.y % 65536)
        self.assertEqual(low16, 0xA6FC)

        key2 = ECC.import_key(pem2)
        low16 = int(key2.pointQ.y % 65536)
        self.assertEqual(low16, 0x6E57)


class TestExport_P384(unittest.TestCase):

    def __init__(self, *args, **kwargs):
        super(TestExport_P384, self).__init__(*args, **kwargs)
        self.ref_private, self.ref_public = create_ref_keys_p384()

    def test_export_public_der_uncompressed(self):
        key_file = load_file("ecc_p384_public.der")

        encoded = self.ref_public._export_subjectPublicKeyInfo(False)
        self.assertEqual(key_file, encoded)

        encoded = self.ref_public.export_key(format="DER")
        self.assertEqual(key_file, encoded)

        encoded = self.ref_public.export_key(format="DER", compress=False)
        self.assertEqual(key_file, encoded)

    def test_export_public_der_compressed(self):
        key_file = load_file("ecc_p384_public.der")
        pub_key = ECC.import_key(key_file)
        key_file_compressed = pub_key.export_key(format="DER", compress=True)

        key_file_compressed_ref = load_file("ecc_p384_public_compressed.der")
        self.assertEqual(key_file_compressed, key_file_compressed_ref)

    def test_export_public_sec1_uncompressed(self):
        key_file = load_file("ecc_p384_public.der")
        value = extract_bitstring_from_spki(key_file)

        encoded = self.ref_public.export_key(format="SEC1")
        self.assertEqual(value, encoded)

    def test_export_public_sec1_compressed(self):
        key_file = load_file("ecc_p384_public.der")
        encoded = self.ref_public.export_key(format="SEC1", compress=True)

        key_file_compressed_ref = load_file("ecc_p384_public_compressed.der")
        value = extract_bitstring_from_spki(key_file_compressed_ref)
        self.assertEqual(value, encoded)

    def test_export_private_der(self):
        key_file = load_file("ecc_p384_private.der")

        encoded = self.ref_private._export_private_der()
        self.assertEqual(key_file, encoded)

        # ---

        encoded = self.ref_private.export_key(format="DER", use_pkcs8=False)
        self.assertEqual(key_file, encoded)

    def test_export_private_pkcs8_clear(self):
        key_file = load_file("ecc_p384_private_p8_clear.der")

        encoded = self.ref_private._export_pkcs8()
        self.assertEqual(key_file, encoded)

        # ---

        encoded = self.ref_private.export_key(format="DER")
        self.assertEqual(key_file, encoded)

    def test_export_private_pkcs8_encrypted(self):
        encoded = self.ref_private._export_pkcs8(passphrase="secret",
                                            protection="PBKDF2WithHMAC-SHA1AndAES128-CBC")

        # This should prove that the output is password-protected
        self.assertRaises(ValueError, ECC._import_pkcs8, encoded, None)

        decoded = ECC._import_pkcs8(encoded, "secret")
        self.assertEqual(self.ref_private, decoded)

        # ---

        encoded = self.ref_private.export_key(format="DER",
                                         passphrase="secret",
                                         protection="PBKDF2WithHMAC-SHA1AndAES128-CBC")
        decoded = ECC.import_key(encoded, "secret")
        self.assertEqual(self.ref_private, decoded)

    def test_export_public_pem_uncompressed(self):
        key_file = load_file("ecc_p384_public.pem", "rt").strip()

        encoded = self.ref_private._export_public_pem(False)
        self.assertEqual(key_file, encoded)

        # ---

        encoded = self.ref_public.export_key(format="PEM")
        self.assertEqual(key_file, encoded)

        encoded = self.ref_public.export_key(format="PEM", compress=False)
        self.assertEqual(key_file, encoded)

    def test_export_public_pem_compressed(self):
        key_file = load_file("ecc_p384_public.pem", "rt").strip()
        pub_key = ECC.import_key(key_file)

        key_file_compressed = pub_key.export_key(format="PEM", compress=True)
        key_file_compressed_ref = load_file("ecc_p384_public_compressed.pem", "rt").strip()

        self.assertEqual(key_file_compressed, key_file_compressed_ref)

    def test_export_private_pem_clear(self):
        key_file = load_file("ecc_p384_private.pem", "rt").strip()

        encoded = self.ref_private._export_private_pem(None)
        self.assertEqual(key_file, encoded)

        # ---

        encoded = self.ref_private.export_key(format="PEM", use_pkcs8=False)
        self.assertEqual(key_file, encoded)

    def test_export_private_pem_encrypted(self):
        encoded = self.ref_private._export_private_pem(passphrase=b"secret")

        # This should prove that the output is password-protected
        self.assertRaises(ValueError, ECC.import_key, encoded)

        assert "EC PRIVATE KEY" in encoded

        decoded = ECC.import_key(encoded, "secret")
        self.assertEqual(self.ref_private, decoded)

        # ---

        encoded = self.ref_private.export_key(format="PEM",
                                         passphrase="secret",
                                         use_pkcs8=False)
        decoded = ECC.import_key(encoded, "secret")
        self.assertEqual(self.ref_private, decoded)

    def test_export_private_pkcs8_and_pem_1(self):
        # PKCS8 inside PEM with both unencrypted
        key_file = load_file("ecc_p384_private_p8_clear.pem", "rt").strip()

        encoded = self.ref_private._export_private_clear_pkcs8_in_clear_pem()
        self.assertEqual(key_file, encoded)

        # ---

        encoded = self.ref_private.export_key(format="PEM")
        self.assertEqual(key_file, encoded)

    def test_export_private_pkcs8_and_pem_2(self):
        # PKCS8 inside PEM with PKCS8 encryption
        encoded = self.ref_private._export_private_encrypted_pkcs8_in_clear_pem("secret",
                              protection="PBKDF2WithHMAC-SHA1AndAES128-CBC")

        # This should prove that the output is password-protected
        self.assertRaises(ValueError, ECC.import_key, encoded)

        assert "ENCRYPTED PRIVATE KEY" in encoded

        decoded = ECC.import_key(encoded, "secret")
        self.assertEqual(self.ref_private, decoded)

        # ---

        encoded = self.ref_private.export_key(format="PEM",
                                         passphrase="secret",
                                         protection="PBKDF2WithHMAC-SHA1AndAES128-CBC")
        decoded = ECC.import_key(encoded, "secret")
        self.assertEqual(self.ref_private, decoded)

    def test_export_openssh_uncompressed(self):
        key_file = load_file("ecc_p384_public_openssh.txt", "rt")

        encoded = self.ref_public._export_openssh(False)
        self.assertEqual(key_file, encoded)

        # ---

        encoded = self.ref_public.export_key(format="OpenSSH")
        self.assertEqual(key_file, encoded)

        encoded = self.ref_public.export_key(format="OpenSSH", compress=False)
        self.assertEqual(key_file, encoded)

    def test_export_openssh_compressed(self):
        key_file = load_file("ecc_p384_public_openssh.txt", "rt")
        pub_key = ECC.import_key(key_file)

        key_file_compressed = pub_key.export_key(format="OpenSSH", compress=True)
        assert len(key_file) > len(key_file_compressed)
        self.assertEqual(pub_key, ECC.import_key(key_file_compressed))

    def test_prng(self):
        # Test that password-protected containers use the provided PRNG
        encoded1 = self.ref_private.export_key(format="PEM",
                                          passphrase="secret",
                                          protection="PBKDF2WithHMAC-SHA1AndAES128-CBC",
                                          randfunc=get_fixed_prng())
        encoded2 = self.ref_private.export_key(format="PEM",
                                          passphrase="secret",
                                          protection="PBKDF2WithHMAC-SHA1AndAES128-CBC",
                                          randfunc=get_fixed_prng())
        self.assertEqual(encoded1, encoded2)

        # ---

        encoded1 = self.ref_private.export_key(format="PEM",
                                          use_pkcs8=False,
                                          passphrase="secret",
                                          randfunc=get_fixed_prng())
        encoded2 = self.ref_private.export_key(format="PEM",
                                          use_pkcs8=False,
                                          passphrase="secret",
                                          randfunc=get_fixed_prng())
        self.assertEqual(encoded1, encoded2)

    def test_byte_or_string_passphrase(self):
        encoded1 = self.ref_private.export_key(format="PEM",
                                          use_pkcs8=False,
                                          passphrase="secret",
                                          randfunc=get_fixed_prng())
        encoded2 = self.ref_private.export_key(format="PEM",
                                          use_pkcs8=False,
                                          passphrase=b"secret",
                                          randfunc=get_fixed_prng())
        self.assertEqual(encoded1, encoded2)

    def test_error_params1(self):
        # Unknown format
        self.assertRaises(ValueError, self.ref_private.export_key, format="XXX")

        # Missing 'protection' parameter when PKCS#8 is used
        self.ref_private.export_key(format="PEM", passphrase="secret",
                               use_pkcs8=False)
        self.assertRaises(ValueError, self.ref_private.export_key, format="PEM",
                                      passphrase="secret")

        # DER format but no PKCS#8
        self.assertRaises(ValueError, self.ref_private.export_key, format="DER",
                                      passphrase="secret",
                                      use_pkcs8=False,
                                      protection="PBKDF2WithHMAC-SHA1AndAES128-CBC")

        # Incorrect parameters for public keys
        self.assertRaises(ValueError, self.ref_public.export_key, format="DER",
                          use_pkcs8=False)

        # Empty password
        self.assertRaises(ValueError, self.ref_private.export_key, format="PEM",
                                      passphrase="", use_pkcs8=False)
        self.assertRaises(ValueError, self.ref_private.export_key, format="PEM",
                                      passphrase="",
                                      protection="PBKDF2WithHMAC-SHA1AndAES128-CBC")

        # No private keys with OpenSSH
        self.assertRaises(ValueError, self.ref_private.export_key, format="OpenSSH",
                                      passphrase="secret")

    def test_compressed_curve(self):

        # Compressed P-384 curve (Y-point is even)
        # openssl ecparam -name secp384p1 -genkey -noout -conv_form compressed -out /tmp/a.pem
        # openssl ec -in /tmp/a.pem -text -noout
        pem1 = """-----BEGIN EC PRIVATE KEY-----
MIGkAgEBBDAM0lEIhvXuekK2SWtdbgOcZtBaxa9TxfpO/GcDFZLCJ3JVXaTgwken
QT+C+XLtD6WgBwYFK4EEACKhZANiAATs0kZMhFDu8DoBC21jrSDPyAUn4aXZ/DM4
ylhDfWmb4LEbeszXceIzfhIUaaGs5y1xXaqf5KXTiAAYx2pKUzAAM9lcGUHCGKJG
k4AgUmVJON29XoUilcFrzjDmuye3B6Q=
-----END EC PRIVATE KEY-----"""

        # Compressed P-384 curve (Y-point is odd)
        pem2 = """-----BEGIN EC PRIVATE KEY-----
MIGkAgEBBDDHPFTslYLltE16fHdSDTtE/2HTmd3M8mqy5MttAm4wZ833KXiGS9oe
kFdx9sNV0KygBwYFK4EEACKhZANiAASLIE5RqVMtNhtBH/u/p/ifqOAlKnK/+RrQ
YC46ZRsnKNayw3wATdPjgja7L/DSII3nZK0G6KOOVwJBznT/e+zudUJYhZKaBLRx
/bgXyxUtYClOXxb1Y/5N7txLstYRyP0=
-----END EC PRIVATE KEY-----"""

        key1 = ECC.import_key(pem1)
        low16 = int(key1.pointQ.y % 65536)
        self.assertEqual(low16, 0x07a4)

        key2 = ECC.import_key(pem2)
        low16 = int(key2.pointQ.y % 65536)
        self.assertEqual(low16, 0xc8fd)


class TestExport_P521(unittest.TestCase):

    def __init__(self, *args, **kwargs):
        super(TestExport_P521, self).__init__(*args, **kwargs)
        self.ref_private, self.ref_public = create_ref_keys_p521()

    def test_export_public_der_uncompressed(self):
        key_file = load_file("ecc_p521_public.der")

        encoded = self.ref_public._export_subjectPublicKeyInfo(False)
        self.assertEqual(key_file, encoded)

        encoded = self.ref_public.export_key(format="DER")
        self.assertEqual(key_file, encoded)

        encoded = self.ref_public.export_key(format="DER", compress=False)
        self.assertEqual(key_file, encoded)

    def test_export_public_der_compressed(self):
        key_file = load_file("ecc_p521_public.der")
        pub_key = ECC.import_key(key_file)
        key_file_compressed = pub_key.export_key(format="DER", compress=True)

        key_file_compressed_ref = load_file("ecc_p521_public_compressed.der")
        self.assertEqual(key_file_compressed, key_file_compressed_ref)

    def test_export_public_sec1_uncompressed(self):
        key_file = load_file("ecc_p521_public.der")
        value = extract_bitstring_from_spki(key_file)

        encoded = self.ref_public.export_key(format="SEC1")
        self.assertEqual(value, encoded)

    def test_export_public_sec1_compressed(self):
        key_file = load_file("ecc_p521_public.der")
        encoded = self.ref_public.export_key(format="SEC1", compress=True)

        key_file_compressed_ref = load_file("ecc_p521_public_compressed.der")
        value = extract_bitstring_from_spki(key_file_compressed_ref)
        self.assertEqual(value, encoded)

    def test_export_private_der(self):
        key_file = load_file("ecc_p521_private.der")

        encoded = self.ref_private._export_private_der()
        self.assertEqual(key_file, encoded)

        # ---

        encoded = self.ref_private.export_key(format="DER", use_pkcs8=False)
        self.assertEqual(key_file, encoded)

    def test_export_private_pkcs8_clear(self):
        key_file = load_file("ecc_p521_private_p8_clear.der")

        encoded = self.ref_private._export_pkcs8()
        self.assertEqual(key_file, encoded)

        # ---

        encoded = self.ref_private.export_key(format="DER")
        self.assertEqual(key_file, encoded)

    def test_export_private_pkcs8_encrypted(self):
        encoded = self.ref_private._export_pkcs8(passphrase="secret",
                                            protection="PBKDF2WithHMAC-SHA1AndAES128-CBC")

        # This should prove that the output is password-protected
        self.assertRaises(ValueError, ECC._import_pkcs8, encoded, None)

        decoded = ECC._import_pkcs8(encoded, "secret")
        self.assertEqual(self.ref_private, decoded)

        # ---

        encoded = self.ref_private.export_key(format="DER",
                                         passphrase="secret",
                                         protection="PBKDF2WithHMAC-SHA1AndAES128-CBC")
        decoded = ECC.import_key(encoded, "secret")
        self.assertEqual(self.ref_private, decoded)

    def test_export_public_pem_uncompressed(self):
        key_file = load_file("ecc_p521_public.pem", "rt").strip()

        encoded = self.ref_private._export_public_pem(False)
        self.assertEqual(key_file, encoded)

        # ---

        encoded = self.ref_public.export_key(format="PEM")
        self.assertEqual(key_file, encoded)

        encoded = self.ref_public.export_key(format="PEM", compress=False)
        self.assertEqual(key_file, encoded)

    def test_export_public_pem_compressed(self):
        key_file = load_file("ecc_p521_public.pem", "rt").strip()
        pub_key = ECC.import_key(key_file)

        key_file_compressed = pub_key.export_key(format="PEM", compress=True)
        key_file_compressed_ref = load_file("ecc_p521_public_compressed.pem", "rt").strip()

        self.assertEqual(key_file_compressed, key_file_compressed_ref)

    def test_export_private_pem_clear(self):
        key_file = load_file("ecc_p521_private.pem", "rt").strip()

        encoded = self.ref_private._export_private_pem(None)
        self.assertEqual(key_file, encoded)

        # ---

        encoded = self.ref_private.export_key(format="PEM", use_pkcs8=False)
        self.assertEqual(key_file, encoded)

    def test_export_private_pem_encrypted(self):
        encoded = self.ref_private._export_private_pem(passphrase=b"secret")

        # This should prove that the output is password-protected
        self.assertRaises(ValueError, ECC.import_key, encoded)

        assert "EC PRIVATE KEY" in encoded

        decoded = ECC.import_key(encoded, "secret")
        self.assertEqual(self.ref_private, decoded)

        # ---

        encoded = self.ref_private.export_key(format="PEM",
                                         passphrase="secret",
                                         use_pkcs8=False)
        decoded = ECC.import_key(encoded, "secret")
        self.assertEqual(self.ref_private, decoded)

    def test_export_private_pkcs8_and_pem_1(self):
        # PKCS8 inside PEM with both unencrypted
        key_file = load_file("ecc_p521_private_p8_clear.pem", "rt").strip()

        encoded = self.ref_private._export_private_clear_pkcs8_in_clear_pem()
        self.assertEqual(key_file, encoded)

        # ---

        encoded = self.ref_private.export_key(format="PEM")
        self.assertEqual(key_file, encoded)

    def test_export_private_pkcs8_and_pem_2(self):
        # PKCS8 inside PEM with PKCS8 encryption
        encoded = self.ref_private._export_private_encrypted_pkcs8_in_clear_pem("secret",
                              protection="PBKDF2WithHMAC-SHA1AndAES128-CBC")

        # This should prove that the output is password-protected
        self.assertRaises(ValueError, ECC.import_key, encoded)

        assert "ENCRYPTED PRIVATE KEY" in encoded

        decoded = ECC.import_key(encoded, "secret")
        self.assertEqual(self.ref_private, decoded)

        # ---

        encoded = self.ref_private.export_key(format="PEM",
                                         passphrase="secret",
                                         protection="PBKDF2WithHMAC-SHA1AndAES128-CBC")
        decoded = ECC.import_key(encoded, "secret")
        self.assertEqual(self.ref_private, decoded)

    def test_export_openssh_uncompressed(self):
        key_file = load_file("ecc_p521_public_openssh.txt", "rt")

        encoded = self.ref_public._export_openssh(False)
        self.assertEqual(key_file, encoded)

        # ---

        encoded = self.ref_public.export_key(format="OpenSSH")
        self.assertEqual(key_file, encoded)

        encoded = self.ref_public.export_key(format="OpenSSH", compress=False)
        self.assertEqual(key_file, encoded)

    def test_export_openssh_compressed(self):
        key_file = load_file("ecc_p521_public_openssh.txt", "rt")
        pub_key = ECC.import_key(key_file)

        key_file_compressed = pub_key.export_key(format="OpenSSH", compress=True)
        assert len(key_file) > len(key_file_compressed)
        self.assertEqual(pub_key, ECC.import_key(key_file_compressed))

    def test_prng(self):
        # Test that password-protected containers use the provided PRNG
        encoded1 = self.ref_private.export_key(format="PEM",
                                          passphrase="secret",
                                          protection="PBKDF2WithHMAC-SHA1AndAES128-CBC",
                                          randfunc=get_fixed_prng())
        encoded2 = self.ref_private.export_key(format="PEM",
                                          passphrase="secret",
                                          protection="PBKDF2WithHMAC-SHA1AndAES128-CBC",
                                          randfunc=get_fixed_prng())
        self.assertEqual(encoded1, encoded2)

        # ---

        encoded1 = self.ref_private.export_key(format="PEM",
                                          use_pkcs8=False,
                                          passphrase="secret",
                                          randfunc=get_fixed_prng())
        encoded2 = self.ref_private.export_key(format="PEM",
                                          use_pkcs8=False,
                                          passphrase="secret",
                                          randfunc=get_fixed_prng())
        self.assertEqual(encoded1, encoded2)

    def test_byte_or_string_passphrase(self):
        encoded1 = self.ref_private.export_key(format="PEM",
                                          use_pkcs8=False,
                                          passphrase="secret",
                                          randfunc=get_fixed_prng())
        encoded2 = self.ref_private.export_key(format="PEM",
                                          use_pkcs8=False,
                                          passphrase=b"secret",
                                          randfunc=get_fixed_prng())
        self.assertEqual(encoded1, encoded2)

    def test_error_params1(self):
        # Unknown format
        self.assertRaises(ValueError, self.ref_private.export_key, format="XXX")

        # Missing 'protection' parameter when PKCS#8 is used
        self.ref_private.export_key(format="PEM", passphrase="secret",
                               use_pkcs8=False)
        self.assertRaises(ValueError, self.ref_private.export_key, format="PEM",
                                      passphrase="secret")

        # DER format but no PKCS#8
        self.assertRaises(ValueError, self.ref_private.export_key, format="DER",
                                      passphrase="secret",
                                      use_pkcs8=False,
                                      protection="PBKDF2WithHMAC-SHA1AndAES128-CBC")

        # Incorrect parameters for public keys
        self.assertRaises(ValueError, self.ref_public.export_key, format="DER",
                          use_pkcs8=False)

        # Empty password
        self.assertRaises(ValueError, self.ref_private.export_key, format="PEM",
                                      passphrase="", use_pkcs8=False)
        self.assertRaises(ValueError, self.ref_private.export_key, format="PEM",
                                      passphrase="",
                                      protection="PBKDF2WithHMAC-SHA1AndAES128-CBC")

        # No private keys with OpenSSH
        self.assertRaises(ValueError, self.ref_private.export_key, format="OpenSSH",
                                      passphrase="secret")

    def test_compressed_curve(self):

        # Compressed P-521 curve (Y-point is even)
        # openssl ecparam -name secp521r1 -genkey -noout -conv_form compressed -out /tmp/a.pem
        # openssl ec -in /tmp/a.pem -text -noout
        pem1 = """-----BEGIN EC PRIVATE KEY-----
MIHcAgEBBEIAnm1CEjVjvNfXEN730p+D6su5l+mOztdc5XmTEoti+s2R4GQ4mAv3
0zYLvyklvOHw0+yy8d0cyGEJGb8T3ZVKmg2gBwYFK4EEACOhgYkDgYYABAHzjTI1
ckxQ3Togi0LAxiG0PucdBBBs5oIy3df95xv6SInp70z+4qQ2EltEmdNMssH8eOrl
M5CYdZ6nbcHMVaJUvQEzTrYxvFjOgJiOd+E9eBWbLkbMNqsh1UKVO6HbMbW0ohCI
uGxO8tM6r3w89/qzpG2SvFM/fvv3mIR30wSZDD84qA==
-----END EC PRIVATE KEY-----"""

        # Compressed P-521 curve (Y-point is odd)
        pem2 = """-----BEGIN EC PRIVATE KEY-----
MIHcAgEBBEIB84OfhJluLBRLn3+cC/RQ37C2SfQVP/t0gQK2tCsTf5avRcWYRrOJ
PmX9lNnkC0Hobd75QFRmdxrB0Wd1/M4jZOWgBwYFK4EEACOhgYkDgYYABAAMZcdJ
1YLCGHt3bHCEzdidVy6+brlJIbv1aQ9fPQLF7WKNv4c8w3H8d5a2+SDZilBOsk5c
6cNJDMz2ExWQvxl4CwDJtJGt1+LHVKFGy73NANqVxMbRu+2F8lOxkNp/ziFTbVyV
vv6oYkMIIi7r5oQWAiQDrR2mlrrFDL9V7GH/r8SWQw==
-----END EC PRIVATE KEY-----"""

        key1 = ECC.import_key(pem1)
        low16 = int(key1.pointQ.y % 65536)
        self.assertEqual(low16, 0x38a8)

        key2 = ECC.import_key(pem2)
        low16 = int(key2.pointQ.y % 65536)
        self.assertEqual(low16, 0x9643)


def get_tests(config={}):
    tests = []
    tests += list_test_cases(TestImport)
    try:
        tests += list_test_cases(TestImport_P256)
        tests += list_test_cases(TestImport_P384)
        tests += list_test_cases(TestImport_P521)
        tests += list_test_cases(TestExport_P256)
        tests += list_test_cases(TestExport_P384)
        tests += list_test_cases(TestExport_P521)
    except MissingTestVectorException:
        pass
    return tests


if __name__ == '__main__':
    suite = lambda: unittest.TestSuite(get_tests())
    unittest.main(defaultTest='suite')
