|
Server : Apache System : Linux iad1-shared-b8-43 6.6.49-grsec-jammy+ #10 SMP Thu Sep 12 23:23:08 UTC 2024 x86_64 User : dh_edsupp ( 6597262) PHP Version : 8.2.26 Disable Function : NONE Directory : /lib/python3/dist-packages/nacl/bindings/__pycache__/ |
Upload File : |
o
��a� � @ s� d dl mZ d dlmZmZ d dl mZ dededefdd�Z d ed
e
defd d �Z d ed
e
defd
d�Z dedefdd�Z
dededefdd�ZdS )� N)�ffi�lib)�ensure�inp1�inp2�returnc C s� t t| t�tjd� t t|t�tjd� tt| �t|��}t�d|�}t�d|�}t� || t| �� t� ||t|�� t| �t|�k}t
� |||�dk}|oO|S )zA
Compare contents of two memory regions in constant time
��raisingzchar []r ) r �
isinstance�bytes�exc� TypeError�max�lenr �new�memmover �
sodium_memcmp)r r �ln�buf1�buf2�eqL�eqC� r �5/usr/lib/python3/dist-packages/nacl/bindings/utils.pyr s r �s� blocksizec C s� t t| t�tjd� t t|t�tjd� |dkrtj�t| �}|| }t� d|�}t� dd�}t�
|| |� t � |||||�}t |dkdtj
d� t�||d �dd� S )z�
Pad the input bytearray ``s`` to a multiple of ``blocksize``
using the ISO/IEC 7816-4 algorithm
:param s: input bytes string
:type s: bytes
:param blocksize:
:type blocksize: int
:return: padded string
:rtype: bytes
r r �unsigned char []� size_t []� zPadding failureN)r r
r r r
�int�
ValueErrorr r r r r �
sodium_pad� CryptoError�buffer)r r �s_len�m_len�buf�p_len�rcr r r r! ) s r! c C sn t t| t�tjd� t t|t�tjd� t| �}t�dd�}t �
|| ||�}|dkr/t� d��| d|d � S )z�
Remove ISO/IEC 7816-4 padding from the input byte array ``s``
:param s: input bytes string
:type s: bytes
:param blocksize:
:type blocksize: int
:return: unpadded string
:rtype: bytes
r r r r zUnpadding failureN) r r
r r r
r r r r r � sodium_unpadr" )r r r$ �u_lenr( r r r r) C s
r) �inpc C sV t t| t�tjd� t| �}t�d|�}t�|| |� t �
||� t� ||�dd� S )ag
Increment the value of a byte-sequence interpreted
as the little-endian representation of a unsigned big integer.
:param inp: input bytes buffer
:type inp: bytes
:return: a byte-sequence representing, as a little-endian
unsigned big integer, the value ``to_int(inp)``
incremented by one.
:rtype: bytes
r r N) r r
r r r
r r r r r �sodium_incrementr# )r+ r r& r r r r, X s
r, �a�bc C s� t t| t�tjd� t t|t�tjd� t| �}t t|�|ktjd� t�d|�}t�d|�}t�|| |� t�|||� t �
|||� t� ||�dd� S )a
Given a couple of *same-sized* byte sequences, interpreted as the
little-endian representation of two unsigned integers, compute
the modular addition of the represented values, in constant time for
a given common length of the byte sequences.
:param a: input bytes buffer
:type a: bytes
:param b: input bytes buffer
:type b: bytes
:return: a byte-sequence representing, as a little-endian big integer,
the integer value of ``(to_int(a) + to_int(b)) mod 2^(8*len(a))``
:rtype: bytes
r r N) r r
r r r
r r r r r �
sodium_addr# )r- r. r �buf_a�buf_br r r r/ q s r/ )�nacl.exceptions�
exceptionsr � nacl._sodiumr r r r �boolr r r! r) r, r/ r r r r �<module> s