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[ s z_DHPrivateKey.__init__c C s t | j| j�S )N)r2 r r )r r r r �key_sizea s z_DHPrivateKey.key_sizec C sT | j jjd�}| j jjd�}| j jjd�}| j jj| j|||� | j j|d | j jjk� | j j|d | j jjk� |d | j jjkr�d }n| j j|d �}| j jjd�}| j jjd�}| j jj | j||� | j j|d | j jjk� | j j|d | j jjk� t j t j t j | j j|d �| j j|d �|d�| j j|d �d�| j j|d �d�S )Nz BIGNUM **r )r" r# r )r' �y)�public_numbers�x)r r r r r r r r r$ � DH_get0_keyr ZDHPrivateNumbers�DHPublicNumbersr% )r r" r# r r& �pub_keyZpriv_keyr r r �private_numberse s, z _DHPrivateKey.private_numbersc C s� | j jjd| j�}| j jjd�}| j jj|j|| j jj� | j j|d | j jjk� | j jj ||d | j�}|dkr�| j j � }t d|��nL| j j|dk� | j jj |�d |� }| jt |� }|dkr�d| | }|S d S )Nzunsigned char[]z BIGNUM **r r zKError computing shared key. Public key is likely invalid for this exchange.� ���)r r r r5 r r; r r r ZDH_compute_keyZ_consume_errors_with_textr) �buffer�len)r Zpeer_public_keyZbufr= r Zerrors_with_text�keyZpadr r r �exchange� s$ z_DHPrivateKey.exchangec C s� t | j| j�}| jjjd�}| jjj| j|| jjj� | jj|d | jjjk� | jjj |d �}| jj|| jjjk� | jjj ||| jjj�}| jj|dk� | jj |�}t | j||�S )Nz BIGNUM **r r ) r r r r r r r; r r r Z DH_set0_keyZ_dh_cdata_to_evp_pkey� _DHPublicKey)r r r= Z pub_key_dupr r6 r r r � public_key� s z_DHPrivateKey.public_keyc C s t | j| j�S )N)r r r )r r r r � parameters� s z_DHPrivateKey.parametersc C s� |t jjk rtd��| jjjsl| jjjd�}| jjj | j | jjj || jjj � |d | jjj krlt dt j��| jj|||| | j| j �S )Nz0DH private keys support only PKCS8 serializationz BIGNUM **r z'DH X9.42 serialization is not supported)r Z PrivateFormatZPKCS8r) r r r* r r r r r r r r+ Z_private_key_bytesr4 )r r, r- Zencryption_algorithmr r r r � private_bytes� s* z_DHPrivateKey.private_bytesN) r/ r0 r1 r! �propertyr7 r> rD rF rG rH r r r r r3 Y s r3 c @ s8 e Zd Zdd� Zedd� �Zdd� Zdd� Zd d � Zd S ) rE c C s& || _ || _|| _t| j | j�| _d S )N)r r r4 r2 �_key_size_bits)r r r r6 r r r r! � s z_DHPublicKey.__init__c C s | j S )N)rJ )r r r r r7 � s z_DHPublicKey.key_sizec C s | j jjd�}| j jjd�}| j jjd�}| j jj| j|||� | j j|d | j jjk� | j j|d | j jjk� |d | j jjkr�d }n| j j|d �}| j jjd�}| j jj | j|| j jj� | j j|d | j jjk� t j t j | j j|d �| j j|d �|d�| j j|d �d�S )Nz BIGNUM **r )r" r# r )r' r8 ) r r r r r r r r r$ r; r r< r% )r r" r# r r& r= r r r r9 � s& z_DHPublicKey.public_numbersc C s t | j| j�S )N)r r r )r r r r rG � s z_DHPublicKey.parametersc C s� |t jjk rtd��| jjjsl| jjjd�}| jjj | j | jjj || jjj � |d | jjj krlt dt j��| jj||| | jd �S )Nz>DH public keys support only SubjectPublicKeyInfo serializationz BIGNUM **r z'DH X9.42 serialization is not supported)r Z PublicFormatZSubjectPublicKeyInfor) r r r* r r r r r r r r+ Z_public_key_bytesr4 )r r, r- r r r r � public_bytes� s z_DHPublicKey.public_bytesN) r/ r0 r1 r! rI r7 r9 rG rK r r r r rE � s rE N)Z __future__r r r Z cryptographyr Zcryptography.exceptionsr r Z cryptography.hazmat.primitivesr Z)cryptography.hazmat.primitives.asymmetricr r r Zregister_interfaceZ DHParametersWithSerialization�objectr r2 Z DHPrivateKeyWithSerializationr3 Z DHPublicKeyWithSerializationrE r r r r �<module> s -v
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