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# -*- coding: utf-8 -*-

import unittest

from ..ecc.curve import Curve
from ..util.keyhelper import KeyHelper


class Curve25519Test(unittest.TestCase):
    def test_agreement(self):
        alicePublic = bytearray([0x05, 0x1b, 0xb7, 0x59, 0x66, 0xf2, 0xe9, 0x3a, 0x36, 0x91, 0xdf, 0xff, 0x94,
                                 0x2b, 0xb2, 0xa4, 0x66, 0xa1, 0xc0, 0x8b, 0x8d, 0x78, 0xca, 0x3f, 0x4d, 0x6d,
                                 0xf8, 0xb8, 0xbf, 0xa2, 0xe4, 0xee, 0x28])
        alicePrivate = bytearray([0xc8, 0x06, 0x43, 0x9d, 0xc9, 0xd2, 0xc4, 0x76, 0xff, 0xed, 0x8f, 0x25, 0x80,
                                  0xc0, 0x88, 0x8d, 0x58, 0xab, 0x40, 0x6b, 0xf7, 0xae, 0x36, 0x98, 0x87, 0x90,
                                  0x21, 0xb9, 0x6b, 0xb4, 0xbf, 0x59])

        bobPublic = bytearray([0x05, 0x65, 0x36, 0x14, 0x99, 0x3d, 0x2b, 0x15, 0xee, 0x9e, 0x5f, 0xd3, 0xd8, 0x6c,
                               0xe7, 0x19, 0xef, 0x4e, 0xc1, 0xda, 0xae, 0x18, 0x86, 0xa8, 0x7b, 0x3f, 0x5f, 0xa9,
                               0x56, 0x5a, 0x27, 0xa2, 0x2f])

        bobPrivate = bytearray([0xb0, 0x3b, 0x34, 0xc3, 0x3a, 0x1c, 0x44, 0xf2, 0x25, 0xb6, 0x62, 0xd2, 0xbf,
                                0x48, 0x59, 0xb8, 0x13, 0x54, 0x11, 0xfa, 0x7b, 0x03, 0x86, 0xd4, 0x5f, 0xb7,
                                0x5d, 0xc5, 0xb9, 0x1b, 0x44, 0x66])

        shared = bytearray([0x32, 0x5f, 0x23, 0x93, 0x28, 0x94, 0x1c, 0xed, 0x6e, 0x67, 0x3b, 0x86, 0xba, 0x41,
                            0x01, 0x74, 0x48, 0xe9, 0x9b, 0x64, 0x9a, 0x9c, 0x38, 0x06, 0xc1, 0xdd, 0x7c, 0xa4,
                            0xc4, 0x77, 0xe6, 0x29])

        alicePublicKey = Curve.decodePoint(alicePublic, 0)
        alicePrivateKey = Curve.decodePrivatePoint(alicePrivate)

        bobPublicKey = Curve.decodePoint(bobPublic, 0)
        bobPrivateKey = Curve.decodePrivatePoint(bobPrivate)

        sharedOne = Curve.calculateAgreement(alicePublicKey, bobPrivateKey)
        sharedTwo = Curve.calculateAgreement(bobPublicKey, alicePrivateKey)

        self.assertEqual(sharedOne, shared)
        self.assertEqual(sharedTwo, shared)

    def test_randomAgreements(self):

        for i in range(0, 50):
            alice = Curve.generateKeyPair()
            bob = Curve.generateKeyPair()
            sharedAlice = Curve.calculateAgreement(bob.getPublicKey(), alice.getPrivateKey())
            sharedBob = Curve.calculateAgreement(alice.getPublicKey(), bob.getPrivateKey())
            self.assertEqual(sharedAlice, sharedBob)

    def test_gensig(self):
        identityKeyPair = KeyHelper.generateIdentityKeyPair()
        KeyHelper.generateSignedPreKey(identityKeyPair, 0)

    def test_signature(self):
        # aliceIdentityPrivate = bytearray([0xc0, 0x97, 0x24, 0x84, 0x12, 0xe5, 0x8b, 0xf0, 0x5d, 0xf4, 0x87, 0x96,
        #                                   0x82, 0x05, 0x13, 0x27, 0x94, 0x17, 0x8e, 0x36, 0x76, 0x37, 0xf5, 0x81,
        #                                   0x8f, 0x81, 0xe0, 0xe6, 0xce, 0x73, 0xe8, 0x65])

        aliceIdentityPublic = bytearray([0x05, 0xab, 0x7e, 0x71, 0x7d, 0x4a, 0x16, 0x3b, 0x7d, 0x9a, 0x1d, 0x80,
                                         0x71, 0xdf, 0xe9, 0xdc, 0xf8, 0xcd, 0xcd, 0x1c, 0xea, 0x33, 0x39, 0xb6,
                                         0x35, 0x6b, 0xe8, 0x4d, 0x88, 0x7e, 0x32, 0x2c, 0x64])

        aliceEphemeralPublic = bytearray([0x05, 0xed, 0xce, 0x9d, 0x9c, 0x41, 0x5c, 0xa7, 0x8c, 0xb7, 0x25, 0x2e,
                                          0x72, 0xc2, 0xc4, 0xa5, 0x54, 0xd3, 0xeb, 0x29, 0x48, 0x5a, 0x0e, 0x1d,
                                          0x50, 0x31, 0x18, 0xd1, 0xa8, 0x2d, 0x99, 0xfb, 0x4a])

        aliceSignature = bytearray([0x5d, 0xe8, 0x8c, 0xa9, 0xa8, 0x9b, 0x4a, 0x11, 0x5d, 0xa7, 0x91, 0x09, 0xc6,
                                    0x7c, 0x9c, 0x74, 0x64, 0xa3, 0xe4, 0x18, 0x02, 0x74, 0xf1, 0xcb, 0x8c, 0x63,
                                    0xc2, 0x98, 0x4e, 0x28, 0x6d, 0xfb, 0xed, 0xe8, 0x2d, 0xeb, 0x9d, 0xcd, 0x9f,
                                    0xae, 0x0b, 0xfb, 0xb8, 0x21, 0x56, 0x9b, 0x3d, 0x90, 0x01, 0xbd, 0x81, 0x30,
                                    0xcd, 0x11, 0xd4, 0x86, 0xce, 0xf0, 0x47, 0xbd, 0x60, 0xb8, 0x6e, 0x88])

        # alicePrivateKey = Curve.decodePrivatePoint(aliceIdentityPrivate)
        alicePublicKey = Curve.decodePoint(aliceIdentityPublic, 0)
        aliceEphemeral = Curve.decodePoint(aliceEphemeralPublic, 0)

        res = Curve.verifySignature(alicePublicKey, aliceEphemeral.serialize(), bytes(aliceSignature))
        self.assertTrue(res)