Example #1
0
    def test_encrypt_decrypt_bigfile(self):
        # Expected block size + 11 bytes padding
        pub_key, priv_key = rsa.newkeys((6 + 11) * 8)

        # Encrypt the file
        message = b('123456Sybren')
        infile = BytesIO(message)
        outfile = BytesIO()

        bigfile.encrypt_bigfile(infile, outfile, pub_key)

        # Test
        crypto = outfile.getvalue()

        cryptfile = BytesIO(crypto)
        clearfile = BytesIO()

        bigfile.decrypt_bigfile(cryptfile, clearfile, priv_key)
        self.assertEquals(clearfile.getvalue(), message)

        # We have 2x6 bytes in the message, so that should result in two
        # bigfile.
        cryptfile.seek(0)
        varblocks = list(varblock.yield_varblocks(cryptfile))
        self.assertEqual(2, len(varblocks))
    def test_encrypt_decrypt_bigfile(self):
        # Expected block size + 11 bytes padding
        pub_key, priv_key = rsa.newkeys((6 + 11) * 8)

        # Encrypt the file
        message = b('123456Sybren')
        infile = BytesIO(message)
        outfile = BytesIO()

        bigfile.encrypt_bigfile(infile, outfile, pub_key)

        # Test
        crypto = outfile.getvalue()

        cryptfile = BytesIO(crypto)
        clearfile = BytesIO()

        bigfile.decrypt_bigfile(cryptfile, clearfile, priv_key)
        self.assertEquals(clearfile.getvalue(), message)

        # We have 2x6 bytes in the message, so that should result in two
        # bigfile.
        cryptfile.seek(0)
        varblocks = list(varblock.yield_varblocks(cryptfile))
        self.assertEqual(2, len(varblocks))
Example #3
0
def decrypt_bigfile(infile, outfile, priv_key):
    """Decrypts an encrypted VARBLOCK file, writing it to 'outfile'

    .. deprecated:: 3.4
        This function was deprecated in Python-RSA version 3.4 due to security issues
        in the VARBLOCK format. See the documentation_ for more information.

    .. _documentation: https://stuvel.eu/python-rsa-doc/usage.html#working-with-big-files

    :param infile: file-like object to read the crypto in VARBLOCK format from
    :param outfile: file-like object to write the cleartext to
    :param priv_key: :py:class:`rsa.PrivateKey` to decrypt with

    """

    warnings.warn("The 'rsa.bigfile.decrypt_bigfile' function was deprecated in Python-RSA version "
                  "3.4 due to security issues in the VARBLOCK format. See "
                  "https://stuvel.eu/python-rsa-doc/usage.html#working-with-big-files "
                  "for more information.",
                  DeprecationWarning, stacklevel=2)

    if not isinstance(priv_key, key.PrivateKey):
        raise TypeError('Private key required, but got %r' % priv_key)

    for block in varblock.yield_varblocks(infile):
        cleartext = pkcs1.decrypt(block, priv_key)
        outfile.write(cleartext)
Example #4
0
def decrypt_bigfile(infile, outfile, priv_key):
    """Decrypts an encrypted VARBLOCK file, writing it to 'outfile'

    .. deprecated:: 3.4
        This function was deprecated in Python-RSA version 3.4 due to security issues
        in the VARBLOCK format. See the documentation_ for more information.

    .. _documentation: https://stuvel.eu/python-rsa-doc/usage.html#working-with-big-files

    :param infile: file-like object to read the crypto in VARBLOCK format from
    :param outfile: file-like object to write the cleartext to
    :param priv_key: :py:class:`rsa.PrivateKey` to decrypt with

    """

    warnings.warn("The 'rsa.bigfile.decrypt_bigfile' function was deprecated in Python-RSA version "
                  "3.4 due to security issues in the VARBLOCK format. See "
                  "https://stuvel.eu/python-rsa-doc/usage.html#working-with-big-files "
                  "for more information.",
                  DeprecationWarning, stacklevel=2)

    if not isinstance(priv_key, key.PrivateKey):
        raise TypeError('Private key required, but got %r' % priv_key)

    for block in varblock.yield_varblocks(infile):
        cleartext = pkcs1.decrypt(block, priv_key)
        outfile.write(cleartext)
Example #5
0
def decrypt_bigfile(infile, outfile, priv_key):
    """Decrypts an encrypted VARBLOCK file, writing it to 'outfile'
    
    :param infile: file-like object to read the crypto in VARBLOCK format from
    :param outfile: file-like object to write the cleartext to
    :param priv_key: :py:class:`rsa.PrivateKey` to decrypt with
    
    """
    if not isinstance(priv_key, key.PrivateKey):
        raise TypeError('Private key required, but got %r' % priv_key)
    for block in varblock.yield_varblocks(infile):
        cleartext = pkcs1.decrypt(block, priv_key)
        outfile.write(cleartext)
Example #6
0
def decrypt_bigfile(infile, outfile, priv_key):
    '''Decrypts an encrypted VARBLOCK file, writing it to 'outfile'
    
    :param infile: file-like object to read the crypto in VARBLOCK format from
    :param outfile: file-like object to write the cleartext to
    :param priv_key: :py:class:`rsa.PrivateKey` to decrypt with

    '''

    if not isinstance(priv_key, key.PrivateKey):
        raise TypeError('Private key required, but got %r' % priv_key)
    
    for block in varblock.yield_varblocks(infile):
        cleartext = pkcs1.decrypt(block, priv_key)
        outfile.write(cleartext)
Example #7
0
def decrypt_bigfile(infile, outfile, priv_key):
    if not isinstance(priv_key, key.PrivateKey):
        raise TypeError('Private key required, but got %r' % priv_key)
    for block in varblock.yield_varblocks(infile):
        cleartext = pkcs1.decrypt(block, priv_key)
        outfile.write(cleartext)
Example #8
0
    def test_yield_varblock(self):
        infile = StringIO("\x01\x0512345\x06Sybren")

        varblocks = list(varblock.yield_varblocks(infile))
        self.assertEqual(["12345", "Sybren"], varblocks)
    def test_yield_varblock(self):
        infile = BytesIO(b('\x01\x0512345\x06Sybren'))

        varblocks = list(varblock.yield_varblocks(infile))
        self.assertEqual([b('12345'), b('Sybren')], varblocks)
Example #10
0
def decrypt_bigfile(infile, outfile, priv_key):
    if not isinstance(priv_key, key.PrivateKey):
        raise TypeError('Private key required, but got %r' % priv_key)
    for block in varblock.yield_varblocks(infile):
        cleartext = pkcs1.decrypt(block, priv_key)
        outfile.write(cleartext)
Example #11
0
    def test_yield_varblock(self):
        infile = BytesIO(b('\x01\x0512345\x06Sybren'))

        varblocks = list(varblock.yield_varblocks(infile))
        self.assertEqual([b('12345'), b('Sybren')], varblocks)
pub_key = rsa.PublicKey.load_pkcs1(keydata)

with open('private.pem', mode='rb') as privatefile:
	keydata = privatefile.read()
priv_key = rsa.PrivateKey.load_pkcs1(keydata)

with open(inpfile, 'rb') as infile, open(outfile, 'wb') as oufile:
	encrypt_bigfile(infile, oufile, pub_key)

key_bytes = common.byte_size(pub_key.n) * BITS
padding_bytes = 11 * BITS

messages = []
ciphers = []
with open(outfile, 'rb') as oufile:
	for block in varblock.yield_varblocks(oufile):
		cleartext = pkcs1.decrypt(block, priv_key)

		message = BitArray(bytes=cleartext).bin
		cipher = BitArray(bytes=block).bin
		
		if len(message) == (key_bytes - padding_bytes):
			messages.append(np.array(map(int, message)))
			ciphers.append(np.array(map(int, cipher)))

messages = np.array(messages)
ciphers = np.array(ciphers)

training_dataset = (messages, ciphers)
with open("m2c_training_dataset.p", "wb") as f:
	pickle.dump(training_dataset, f)