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    ê°Íbè  ã                   @   sV   d dl mZ ddlmZ ddlmZ ddlmZ ddlm	Z	 ddl
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S )é    )Úsha256é   )Ú	Signature)ÚMath)ÚRandomInteger)ÚnumberFromByteString)Ú*c                   @   s,   e Zd Zeefdd„ƒZeefdd„ƒZdS )ÚEcdsac                 C   sÂ   |t |ƒƒ ¡ }t|ƒ}|j}d\}}}	|dks8|dkr–t d|jd ¡}
tj|j	|
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$
z
Ecdsa.signc                 C   sö   |t |ƒƒ ¡ }t|ƒ}|j}|j}|j}	d|  krD|jd ksJn dS d|	  krd|jd ksjn dS t |	|j¡}
tj	|j
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   r   r   r   )r   r   )r   r   r   r   r   r   r   r   r   r   r   r   r   ZpointÚaddZisAtInfinityr   )r   r   Ú	signatureZ	publicKeyr   r   r   r   r   r   r   Úu1Úu2Úvr   r   r    Úverify   s     &&zEcdsa.verifyN)Ú__name__Ú
__module__Ú__qualname__Úclassmethodr   r!   r'   r   r   r   r    r	   	   s   r	   N)Zhashlibr   r#   r   Úmathr   Zutils.integerr   Zutils.binaryr   Zutils.compatibilityr	   r   r   r   r    Ú<module>   s   