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B
    _	                 @   s  d dl Z d dlZd dlmZmZ y d dlmZ d dlmZm	Z	 W n e
k
rX   eZY nX eeef edddZeeef edd	d
ZeedddZeedddZeeef edddZeeedddZeedddZeedddZeeedddZeeedddZdS )     N)AnyUnion)EllipticCurve)decode_dss_signatureencode_dss_signature)valuereturnc             C   s.   t | tr| dS t | tr"| S tdd S )Nzutf-8zExpected a string value)
isinstancestrencodebytes	TypeError)r    r   :/opt/alt/python37/lib/python3.7/site-packages/jwt/utils.pyforce_bytes   s
    


r   )inputr   c             C   sB   t | tr| d} t| d }|dkr8| dd|  7 } t| S )Nascii   r      =)r	   r
   r   lenbase64Zurlsafe_b64decode)r   Zremr   r   r   base64url_decode   s    

r   c             C   s   t | ddS )Nr       )r   Zurlsafe_b64encodereplace)r   r   r   r   base64url_encode$   s    r   )valr   c             C   s0   | dk rt dt| }t|dkr(d}t|S )Nr   zMust be a positive integer    )
ValueErrorbytes_from_intr   r   )r   	int_bytesr   r   r   to_base64url_uint(   s    r    c             C   s*   t | tr| d} t| }tj|ddS )Nr   big)	byteorder)r	   r
   r   r   int
from_bytes)r   datar   r   r   from_base64url_uint4   s    

r&   )num	num_bytesr   c             C   s$   dd| | f }t |d}|S )Nz%0*x   r   )binasciiZa2b_hexr   )r'   r(   Z
padded_hexZ
big_endianr   r   r   number_to_bytes<   s    r+   )stringr   c             C   s   t t| dS )N   )r#   r*   Zb2a_hex)r,   r   r   r   bytes_to_numberB   s    r.   c             C   s6   | }d}x|dkr$|d? }|d7 }q
W | j |dddS )Nr         r!   F)signed)to_bytes)r   	remainingZbyte_lengthr   r   r   r   F   s    
r   )der_sigcurver   c             C   s2   |j }|d d }t| \}}t||t|| S )N   r/   )key_sizer   r+   )r4   r5   num_bitsr(   rsr   r   r   der_to_raw_signatureQ   s    r;   )raw_sigr5   r   c             C   sT   |j }|d d }t| d| kr*tdt| d | }t| |d  }t||S )Nr6   r/   r)   zInvalid signature)r7   r   r   r.   r   )r<   r5   r8   r(   r9   r:   r   r   r   raw_to_der_signatureZ   s    r=   )r   r*   typingr   r   Z,cryptography.hazmat.primitives.asymmetric.ecr   Z/cryptography.hazmat.primitives.asymmetric.utilsr   r   ModuleNotFoundErrorr
   r   r   r   r   r#   r    r&   r+   r.   r   r;   r=   r   r   r   r   <module>   s"   
		