openwrt/upstream - upstream openwrt

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author	Gabor Juhos <juhosg@openwrt.org>	2012-04-29 16:56:03 +0000
committer	Gabor Juhos <juhosg@openwrt.org>	2012-04-29 16:56:03 +0000
commit	532b74ff7bd96bfaf6424d3ebe3aed31fd13a4db (patch)
tree	189d46d513b0909f1f2bbf2f382bd566f83c13dd /target/linux/generic/patches-3.3/506-yaffs2-3.2_fix.patch
parent	27a1f6652ac1ad39722b5c0fdf84b3419fe227c9 (diff)
download	upstream-532b74ff7bd96bfaf6424d3ebe3aed31fd13a4db.tar.gz upstream-532b74ff7bd96bfaf6424d3ebe3aed31fd13a4db.tar.bz2 upstream-532b74ff7bd96bfaf6424d3ebe3aed31fd13a4db.zip

linux/3.3: refresh patches

SVN-Revision: 31531

Diffstat (limited to 'target/linux/generic/patches-3.3/506-yaffs2-3.2_fix.patch')

0 files changed, 0 insertions, 0 deletions

# 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 absolute_import, division, print_function import abc import six from cryptography import utils from cryptography.exceptions import AlreadyFinalized from cryptography.hazmat.bindings._padding import lib @six.add_metaclass(abc.ABCMeta) class PaddingContext(object): @abc.abstractmethod def update(self, data): """ Pads the provided bytes and returns any available data as bytes. """ @abc.abstractmethod def finalize(self): """ Finalize the padding, returns bytes. """ def _byte_padding_check(block_size): if not (0 <= block_size <= 2040): raise ValueError("block_size must be in range(0, 2041).") if block_size % 8 != 0: raise ValueError("block_size must be a multiple of 8.") def _byte_padding_update(buffer_, data, block_size): if buffer_ is None: raise AlreadyFinalized("Context was already finalized.") if not isinstance(data, bytes): raise TypeError("data must be bytes.") buffer_ += 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_, block_size, paddingfn): if buffer_ is None: raise AlreadyFinalized("Context was already finalized.") pad_size = block_size // 8 - len(buffer_) return buffer_ + paddingfn(pad_size) def _byte_unpadding_update(buffer_, data, block_size): if buffer_ is None: raise AlreadyFinalized("Context was already finalized.") if not isinstance(data, bytes): raise TypeError("data must be bytes.") buffer_ += 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_, block_size, checkfn): if buffer_ is None: raise AlreadyFinalized("Context was already finalized.") if len(buffer_) != block_size // 8: raise ValueError("Invalid padding bytes.") valid = checkfn(buffer_, block_size // 8) if not valid: raise ValueError("Invalid padding bytes.") pad_size = six.indexbytes(buffer_, -1) return buffer_[:-pad_size] class PKCS7(object): def __init__(self, block_size): _byte_padding_check(block_size) self.block_size = block_size def padder(self): return _PKCS7PaddingContext(self.block_size) def unpadder(self): return _PKCS7UnpaddingContext(self.block_size) @utils.register_interface(PaddingContext) class _PKCS7PaddingContext(object): def __init__(self, block_size): self.block_size = block_size # TODO: more copies than necessary, we should use zero-buffer (#193) self._buffer = b"" def update(self, data): self._buffer, result = _byte_padding_update( self._buffer, data, self.block_size) return result def _padding(self, size): return six.int2byte(size) * size def finalize(self): result = _byte_padding_pad( self._buffer, self.block_size, self._padding) self._buffer = None return result @utils.register_interface(PaddingContext) class _PKCS7UnpaddingContext(object): def __init__(self, block_size): self.block_size = block_size # TODO: more copies than necessary, we should use zero-buffer (#193) self._buffer = b"" def update(self, data): self._buffer, result = _byte_unpadding_update( self._buffer, data, self.block_size) return result def finalize(self): result = _byte_unpadding_check( self._buffer, self.block_size, lib.Cryptography_check_pkcs7_padding) self._buffer = None return result class ANSIX923(object): def __init__(self, block_size): _byte_padding_check(block_size) self.block_size = block_size def padder(self): return _ANSIX923PaddingContext(self.block_size) def unpadder(self): return _ANSIX923UnpaddingContext(self.block_size) @utils.register_interface(PaddingContext) class _ANSIX923PaddingContext(object): def __init__(self, block_size): self.block_size = block_size # TODO: more copies than necessary, we should use zero-buffer (#193) self._buffer = b"" def update(self, data): self._buffer, result = _byte_padding_update( self._buffer, data, self.block_size) return result def _padding(self, size): return six.int2byte(0) * (size - 1) + six.int2byte(size) def finalize(self): result = _byte_padding_pad( self._buffer, self.block_size, self._padding) self._buffer = None return result @utils.register_interface(PaddingContext) class _ANSIX923UnpaddingContext(object): def __init__(self, block_size): self.block_size = block_size # TODO: more copies than necessary, we should use zero-buffer (#193) self._buffer = b"" def update(self, data): self._buffer, result = _byte_unpadding_update( self._buffer, data, self.block_size) return result def finalize(self): result = _byte_unpadding_check( self._buffer, self.block_size, lib.Cryptography_check_ansix923_padding) self._buffer = None return result


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