toxygen_wrapper/wrapper/toxencryptsave.py

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