コード例 #1
0
ファイル: ntorhandshake.py プロジェクト: CivBase/oppy
    def _makeRelayCrypto(self, secret_input):
        '''Derive shared key material using HKDF from secret_input.

        :returns: **oppy.crypto.relaycrypto.RelayCrypto** initialized with
            shared key data
        '''
        prk = hkdf.hkdf_extract(salt=T_KEY, input_key_material=secret_input,
                                hash=hashlib.sha256)
        km = hkdf.hkdf_expand(pseudo_random_key=prk, info=M_EXPAND,
                              length=72, hash=hashlib.sha256)

        df = km[: DIGEST_LEN]
        db = km[DIGEST_LEN : DIGEST_LEN * 2]
        kf = km[DIGEST_LEN * 2 : DIGEST_LEN * 2 + KEY_LEN]
        kb = km[DIGEST_LEN * 2 + KEY_LEN : DIGEST_LEN * 2 + KEY_LEN * 2]

        f_digest = hashlib.sha1(df)
        b_digest = hashlib.sha1(db)
        f_cipher = util.makeAES128CTRCipher(kf)
        b_cipher = util.makeAES128CTRCipher(kb)

        return RelayCrypto(forward_digest=f_digest,
                           backward_digest=b_digest,
                           forward_cipher=f_cipher,
                           backward_cipher=b_cipher)
コード例 #2
0
ファイル: ntorhandshake.py プロジェクト: CivBase/oppy
    def _makeRelayCrypto(self, secret_input):
        '''Derive shared key material using HKDF from secret_input.

        :returns: **oppy.crypto.relaycrypto.RelayCrypto** initialized with
            shared key data
        '''
        prk = hkdf.hkdf_extract(salt=T_KEY,
                                input_key_material=secret_input,
                                hash=hashlib.sha256)
        km = hkdf.hkdf_expand(pseudo_random_key=prk,
                              info=M_EXPAND,
                              length=72,
                              hash=hashlib.sha256)

        df = km[:DIGEST_LEN]
        db = km[DIGEST_LEN:DIGEST_LEN * 2]
        kf = km[DIGEST_LEN * 2:DIGEST_LEN * 2 + KEY_LEN]
        kb = km[DIGEST_LEN * 2 + KEY_LEN:DIGEST_LEN * 2 + KEY_LEN * 2]

        f_digest = hashlib.sha1(df)
        b_digest = hashlib.sha1(db)
        f_cipher = util.makeAES128CTRCipher(kf)
        b_cipher = util.makeAES128CTRCipher(kb)

        return RelayCrypto(forward_digest=f_digest,
                           backward_digest=b_digest,
                           forward_cipher=f_cipher,
                           backward_cipher=b_cipher)
コード例 #3
0
 def test_makeAES123CTRCipher_iv(self, mock_aes, mock_counter):
     mock_counter.return_value = 'ctr'
     mock_aes.return_value = 'ret'
     ret = util.makeAES128CTRCipher('key', 'iv')
     mock_counter.assert_called_once_with(128, initial_value='iv')
     mock_aes.assert_called_once_with('key', AES.MODE_CTR, counter='ctr')
     self.assertEqual(ret, 'ret')
コード例 #4
0
ファイル: test_util.py プロジェクト: nskinkel/oppy
 def test_makeAES123CTRCipher_iv(self, mock_aes, mock_counter):
     mock_counter.return_value = 'ctr'
     mock_aes.return_value = 'ret'
     ret = util.makeAES128CTRCipher('key', 'iv')
     mock_counter.assert_called_once_with(128, initial_value='iv')
     mock_aes.assert_called_once_with('key', AES.MODE_CTR, counter='ctr')
     self.assertEqual(ret, 'ret')