83 lines
4.0 KiB
Python
83 lines
4.0 KiB
Python
# -*- mode: python; indent-tabs-mode: nil; py-indent-offset: 4; coding: utf-8 -*-
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try:
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from wrapper import libtox
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from wrapper.toxencryptsave_enums_and_consts import *
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except:
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import libtox
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from toxencryptsave_enums_and_consts import *
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from ctypes import (ArgumentError, byref, c_bool, c_char_p, c_int, c_size_t,
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create_string_buffer)
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class ToxEncryptSave:
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def __init__(self):
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self.libtoxencryptsave = libtox.LibToxEncryptSave()
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def is_data_encrypted(self, data):
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"""
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Checks if given data is encrypted
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"""
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func = self.libtoxencryptsave.tox_is_data_encrypted
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func.restype = c_bool
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result = func(c_char_p(bytes(data)))
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return result
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def pass_encrypt(self, data, password):
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"""
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Encrypts the given data with the given password.
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:return: output array
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"""
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out = create_string_buffer(len(data) + TOX_PASS_ENCRYPTION_EXTRA_LENGTH)
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tox_err_encryption = c_int()
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self.libtoxencryptsave.tox_pass_encrypt(c_char_p(data),
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c_size_t(len(data)),
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c_char_p(bytes(password, 'utf-8')),
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c_size_t(len(password)),
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out,
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byref(tox_err_encryption))
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tox_err_encryption = tox_err_encryption.value
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if tox_err_encryption == TOX_ERR_ENCRYPTION['OK']:
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return out[:]
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elif tox_err_encryption == TOX_ERR_ENCRYPTION['NULL']:
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raise ArgumentError('Some input data, or maybe the output pointer, was null.')
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elif tox_err_encryption == TOX_ERR_ENCRYPTION['KEY_DERIVATION_FAILED']:
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raise RuntimeError('The crypto lib was unable to derive a key from the given passphrase, which is usually a'
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' lack of memory issue. The functions accepting keys do not produce this error.')
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elif tox_err_encryption == TOX_ERR_ENCRYPTION['FAILED']:
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raise RuntimeError('The encryption itself failed.')
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def pass_decrypt(self, data, password):
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"""
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Decrypts the given data with the given password.
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:return: output array
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"""
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out = create_string_buffer(len(data) - TOX_PASS_ENCRYPTION_EXTRA_LENGTH)
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tox_err_decryption = c_int()
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self.libtoxencryptsave.tox_pass_decrypt(c_char_p(bytes(data)),
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c_size_t(len(data)),
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c_char_p(bytes(password, 'utf-8')),
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c_size_t(len(password)),
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out,
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byref(tox_err_decryption))
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tox_err_decryption = tox_err_decryption.value
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if tox_err_decryption == TOX_ERR_DECRYPTION['OK']:
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return out[:]
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elif tox_err_decryption == TOX_ERR_DECRYPTION['NULL']:
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raise ArgumentError('Some input data, or maybe the output pointer, was null.')
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elif tox_err_decryption == TOX_ERR_DECRYPTION['INVALID_LENGTH']:
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raise ArgumentError('The input data was shorter than TOX_PASS_ENCRYPTION_EXTRA_LENGTH bytes')
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elif tox_err_decryption == TOX_ERR_DECRYPTION['BAD_FORMAT']:
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raise ArgumentError('The input data is missing the magic number (i.e. wasn\'t created by this module, or is'
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' corrupted)')
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elif tox_err_decryption == TOX_ERR_DECRYPTION['KEY_DERIVATION_FAILED']:
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raise RuntimeError('The crypto lib was unable to derive a key from the given passphrase, which is usually a'
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' lack of memory issue. The functions accepting keys do not produce this error.')
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elif tox_err_decryption == TOX_ERR_DECRYPTION['FAILED']:
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raise RuntimeError('The encrypted byte array could not be decrypted. Either the data was corrupt or the '
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'password/key was incorrect.')
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