def _block_final_decrypt(self, data, padding=PADDING_DEFAULT):
if padding == PADDING_DEFAULT:
return strip_PKCS7_padding(self.decrypt(data))
if padding == PADDING_NONE:
if len(data) != 16:
raise Exception('invalid data length for final block')
return self.decrypt(data)
raise Exception('invalid padding option')
def _block_final_decrypt(self, data, padding = PADDING_DEFAULT):
if padding == PADDING_DEFAULT:
return strip_PKCS7_padding(self.decrypt(data))
if padding == PADDING_NONE:
if len(data) != 16:
raise Exception('invalid data length for final block')
return self.decrypt(data)
raise Exception('invalid padding option')
def decrypt(self, edata: bytes) -> bytes:
if not self._password_hash:
raise Exception('You need to call .init() for first')
elif not isinstance(edata, bytes):
raise Exception('edata must be bytes')
else:
aes_cbc = Decrypter(
AESModeOfOperationCBC(self._password_hash, self.__iv))
decrypted = aes_cbc.feed(edata)
decrypted += aes_cbc.feed()
return strip_PKCS7_padding(decrypted)
def decrypt(self, edata: bytes) -> bytes:
if not self._scrypt_key:
raise Exception('You need to call .init() for first')
elif not isinstance(edata, bytes):
raise Exception('edata must be bytes')
else:
iv = edata[-16:]
edata = edata[:-16] # LAST 16 BYTES OF ENCRYPTED DATA IS IV !
aes_cbc = Decrypter(AESModeOfOperationCBC(self._scrypt_key, iv))
decrypted = aes_cbc.feed(edata)
decrypted += aes_cbc.feed()
try:
return strip_PKCS7_padding(decrypted)
except ValueError:
return decrypted # no padding
#
# 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_decrypt(self, data):
return strip_PKCS7_padding(self.decrypt(data))
def _block_final_decrypt(self, data):
return strip_PKCS7_padding(self.decrypt(data))
