31 def _byte_padding_check(block_size):  argument
32     if not (0 <= block_size <= 2040):
35     if block_size % 8 != 0:
39 def _byte_padding_update(buffer_, data, block_size):  argument
50     finished_blocks = len(buffer_) // (block_size // 8)
52     result = buffer_[: finished_blocks * (block_size // 8)]
53     buffer_ = buffer_[finished_blocks * (block_size // 8) :]
58 def _byte_padding_pad(buffer_, block_size, paddingfn):  argument
62     pad_size = block_size // 8 - len(buffer_)
66 def _byte_unpadding_update(buffer_, data, block_size):  argument
77     finished_blocks = max(len(buffer_) // (block_size // 8) - 1, 0)
79     result = buffer_[: finished_blocks * (block_size // 8)]
80     buffer_ = buffer_[finished_blocks * (block_size // 8) :]
85 def _byte_unpadding_check(buffer_, block_size, checkfn):  argument
89     if len(buffer_) != block_size // 8:
92     valid = checkfn(buffer_, block_size // 8)
102     def __init__(self, block_size):  argument
103         _byte_padding_check(block_size)
104         self.block_size = block_size
107         return _PKCS7PaddingContext(self.block_size)
110         return _PKCS7UnpaddingContext(self.block_size)
115     def __init__(self, block_size):  argument
116         self.block_size = block_size
122             self._buffer, data, self.block_size
131             self._buffer, self.block_size, self._padding
139     def __init__(self, block_size):  argument
140         self.block_size = block_size
146             self._buffer, data, self.block_size
152             self._buffer, self.block_size, lib.Cryptography_check_pkcs7_padding
159     def __init__(self, block_size):  argument
160         _byte_padding_check(block_size)
161         self.block_size = block_size
164         return _ANSIX923PaddingContext(self.block_size)
167         return _ANSIX923UnpaddingContext(self.block_size)
172     def __init__(self, block_size):  argument
173         self.block_size = block_size
179             self._buffer, data, self.block_size
188             self._buffer, self.block_size, self._padding
196     def __init__(self, block_size):  argument
197         self.block_size = block_size
203             self._buffer, data, self.block_size
210             self.block_size,