def _block_final_encrypt(self, data, padding=PADDING_DEFAULT): if padding == PADDING_DEFAULT: data = append_PKCS7_padding(data) elif padding == PADDING_NONE: if len(data) != 16: raise Exception('invalid data length for final block') else: raise Exception('invalid padding option') if len(data) == 32: return self.encrypt(data[:16]) + self.encrypt(data[16:]) return self.encrypt(data)
def _block_final_encrypt(self, data, padding = PADDING_DEFAULT): if padding == PADDING_DEFAULT: data = append_PKCS7_padding(data) elif padding == PADDING_NONE: if len(data) != 16: raise Exception('invalid data length for final block') else: raise Exception('invalid padding option') if len(data) == 32: return self.encrypt(data[:16]) + self.encrypt(data[16:]) return self.encrypt(data)
def encrypt(self, data: bytes) -> bytes: if not self._password_hash: raise Exception('You need to call .init() for first') else: if not isinstance(data, bytes): data = data.encode() if len(data) % 16: data = append_PKCS7_padding(data) aes_cbc = Encrypter( AESModeOfOperationCBC(self._password_hash, self.__iv)) encrypted = aes_cbc.feed(data) encrypted += aes_cbc.feed() return encrypted
def encrypt(self, data: bytes, iv: bytes = None) -> bytes: if not self._scrypt_key: raise Exception('You need to call .init() for first') else: iv = urandom(16) if not iv else iv if not isinstance(data, bytes): data = data.encode() if len(data) % 16: data = append_PKCS7_padding(data) aes_cbc = Encrypter(AESModeOfOperationCBC(self._scrypt_key, iv)) encrypted = aes_cbc.feed(data) encrypted += aes_cbc.feed() encrypted += iv # LAST 16 BYTES OF ENCRYPTED DATA IS IV ! return encrypted
# # Copyright (c) 2014 Richard Moore # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. import sys sys.path.append('../pyaes') from pyaes.util import append_PKCS7_padding, strip_PKCS7_padding for i in xrange(0, 17): data = 'A' * i padded = append_PKCS7_padding(data) print repr(padded), strip_PKCS7_padding(padded) == data
# Copyright (c) 2014 Richard Moore # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. import sys sys.path.append('../pyaes') from pyaes.util import append_PKCS7_padding, strip_PKCS7_padding for i in xrange(0, 17): data = 'A' * i padded = append_PKCS7_padding(data) print repr(padded), strip_PKCS7_padding(padded) == data
def _block_final_encrypt(self, data): data = append_PKCS7_padding(data) if len(data) == 32: return self.encrypt(data[:16]) + self.encrypt(data[16:]) return self.encrypt(data)