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yá˜_ú  ã               @   s€   d dl mZmZmZ d dlmZmZ d dlmZ d dl	m
Z
mZ dZdZejeƒG dd„ deƒƒZeje
ƒG d	d
„ d
eƒƒZdS )é    )Úabsolute_importÚdivisionÚprint_function)Ú
exceptionsÚutils)Úserialization)ÚEd448PrivateKeyÚEd448PublicKeyé9   ér   c               @   s,   e Zd Zdd„ Zdd„ Zdd„ Zdd„ Zd	S )
Ú_Ed448PublicKeyc             C   s   || _ || _d S )N)Ú_backendÚ	_evp_pkey)ÚselfÚbackendÚevp_pkey© r   ú/usr/lib64/python3.6/ed448.pyÚ__init__   s    z_Ed448PublicKey.__init__c             C   sV   |t jjks|t jjkr@|t jjk	s0|t jjk	r8tdƒ‚| jƒ S | jj||| | jd ƒS )Nz3When using Raw both encoding and format must be Raw)	r   ÚEncodingÚRawÚPublicFormatÚ
ValueErrorÚ_raw_public_bytesr   Z_public_key_bytesr   )r   ÚencodingÚformatr   r   r   Úpublic_bytes   s    z_Ed448PublicKey.public_bytesc             C   sp   | j jjdtƒ}| j jjdtƒ}| j jj| j||ƒ}| j j|dkƒ | j j|d tkƒ | j jj|tƒd d … S )Nzunsigned char []zsize_t *é   r   )	r   Ú_ffiÚnewÚ_ED448_KEY_SIZEÚ_libÚEVP_PKEY_get_raw_public_keyr   Úopenssl_assertÚbuffer)r   ÚbufÚbuflenÚresr   r   r   r   +   s    z!_Ed448PublicKey._raw_public_bytesc             C   s¬   | j jjƒ }| j j|| j jjkƒ | j jj|| j jjƒ}| j jj|| j jj| j jj| j jj| j	ƒ}| j j|dkƒ | j jj
||t|ƒ|t|ƒƒ}|dkr¨| j jƒ  tj‚d S )Nr   )r   r!   ÚCryptography_EVP_MD_CTX_newr#   r   ÚNULLÚgcÚCryptography_EVP_MD_CTX_freeZEVP_DigestVerifyInitr   ZEVP_DigestVerifyÚlenZ_consume_errorsr   ZInvalidSignature)r   Z	signatureÚdataÚ
evp_md_ctxr'   r   r   r   Úverify5   s     
z_Ed448PublicKey.verifyN)Ú__name__Ú
__module__Ú__qualname__r   r   r   r/   r   r   r   r   r      s   
r   c               @   s4   e Zd Zdd„ Zdd„ Zdd„ Zdd„ Zd	d
„ ZdS )Ú_Ed448PrivateKeyc             C   s   || _ || _d S )N)r   r   )r   r   r   r   r   r   r   M   s    z_Ed448PrivateKey.__init__c             C   sz   | j jjdtƒ}| j jjdtƒ}| j jj| j||ƒ}| j j|dkƒ | j j|d tkƒ | j jj|ƒd d … }| j j	|ƒS )Nzunsigned char []zsize_t *r   r   )
r   r   r   r    r!   r"   r   r#   r$   Zed448_load_public_bytes)r   r%   r&   r'   r   r   r   r   Ú
public_keyQ   s    z_Ed448PrivateKey.public_keyc             C   sð   | j jjƒ }| j j|| j jjkƒ | j jj|| j jjƒ}| j jj|| j jj| j jj| j jj| j	ƒ}| j j|dkƒ | j jj
dtƒ}| j jj
dt|ƒƒ}| j jj||||t|ƒƒ}| j j|dkƒ | j j|d tkƒ | j jj||d ƒd d … S )Nr   zunsigned char[]zsize_t *r   )r   r!   r(   r#   r   r)   r*   r+   ZEVP_DigestSignInitr   r   Ú_ED448_SIG_SIZEr,   ZEVP_DigestSignr$   )r   r-   r.   r'   r%   r&   r   r   r   Úsign\   s$    z_Ed448PrivateKey.signc             C   sf   |t jjks|t jjkrN|t jjk	s>|t jjk	s>t|t jƒ rFtdƒ‚| jƒ S | j	j
|||| | jd ƒS )NzcWhen using Raw both encoding and format must be Raw and encryption_algorithm must be NoEncryption())r   r   r   r   ZPrivateFormatÚ
isinstanceZNoEncryptionr   Ú_raw_private_bytesr   Z_private_key_bytesr   )r   r   r   Zencryption_algorithmr   r   r   Úprivate_bytess   s    z_Ed448PrivateKey.private_bytesc             C   sp   | j jjdtƒ}| j jjdtƒ}| j jj| j||ƒ}| j j|dkƒ | j j|d tkƒ | j jj|tƒd d … S )Nzunsigned char []zsize_t *r   r   )	r   r   r   r    r!   ZEVP_PKEY_get_raw_private_keyr   r#   r$   )r   r%   r&   r'   r   r   r   r8   Š   s    z#_Ed448PrivateKey._raw_private_bytesN)r0   r1   r2   r   r4   r6   r9   r8   r   r   r   r   r3   K   s
   r3   N)Z
__future__r   r   r   Zcryptographyr   r   Zcryptography.hazmat.primitivesr   Z/cryptography.hazmat.primitives.asymmetric.ed448r   r	   r    r5   Zregister_interfaceÚobjectr   r3   r   r   r   r   Ú<module>   s   8