Python append_PKCS7_padding Examples

Example #1

File: blockfeeder.py Project: justyhub/py-kms-1

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)

Example #2

File: blockfeeder.py Project: mengzxh/py-kms

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)

Example #3

File: tgback_utils.py Project: 106FaceEater106/tgback

    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

Example #4

    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

Example #5

#
# 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

Example #6

File: test-util.py Project: asongsoekamti/python

# 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

Example #7

File: blockfeeder.py Project: StickNClutch/ownNotes

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)

Example #8

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)