File: //lib/python3/dist-packages/cryptography/hazmat/backends/openssl/__pycache__/dsa.cpython-310.pyc
o
�)%a�) � @ s� d dl Z d dlmZ d dlmZ d dlmZmZmZ d dl m
Z
m Z d dl m
Z
mZmZmZ dd� Zd d
� ZG d d � d e�ZG d
d� de
�ZG dd� dej�ZG dd� dej�ZG dd� dej�ZdS )� N)�utils)�InvalidSignature)� _calculate_digest_and_algorithm�_check_not_prehashed� _warn_sign_verify_deprecated)�hashes�
serialization)�AsymmetricSignatureContext� AsymmetricVerificationContext�dsar c C sx | j �|j�}| j�d|�}| j�d�}| j �d|t|�|||j�}| �|dk� | �|d � | j�|�d |d � S )Nzunsigned char[]zunsigned int *r � ) �_lib�DSA_size�
_dsa_cdata�_ffi�new�DSA_sign�len�openssl_assert�buffer)�backend� private_key�data� sig_buf_len�sig_buf�buflen�res� r �J/usr/lib/python3/dist-packages/cryptography/hazmat/backends/openssl/dsa.py�
_dsa_sig_sign s �r c C s8 | j �d|t|�|t|�|j�}|dkr| �� t�d S )Nr r )r
�
DSA_verifyr r �_consume_errorsr )r �
public_key� signaturer r r r r �_dsa_sig_verify( s ��r$ c @ s$ e Zd Zdd� Zdd� Zdd� ZdS )�_DSAVerificationContextc C s. || _ || _|| _|| _t�| j| j �| _d S �N)�_backend� _public_key�
_signature�
_algorithmr �Hash� _hash_ctx)�selfr r" r# � algorithmr r r �__init__5 s
z _DSAVerificationContext.__init__c C � | j �|� d S r& �r, �update�r- r r r r r2 = � z _DSAVerificationContext.updatec C s" | j �� }t| j| j| j|� d S r& )r, �finalizer$ r' r( r) )r- �data_to_verifyr r r �verify@ s
�z _DSAVerificationContext.verifyN)�__name__�
__module__� __qualname__r/ r2 r7 r r r r r% 4 s r% c @ sB e Zd Zdejdejfdd�Zdeddfdd �Z defd
d �Z
dS ) �_DSASignatureContextr r. c C s( || _ || _|| _t�| j| j �| _d S r& )r' � _private_keyr* r r+ r, )r- r r r. r r r r/ I s z _DSASignatureContext.__init__r �returnNc C r0 r& r1 r3 r r r r2 T r4 z_DSASignatureContext.updatec C s | j �� }t| j| j|�S r& )r, r5 r r' r< )r- � data_to_signr r r r5 W s
z _DSASignatureContext.finalize) r8 r9 r: r �
DSAPrivateKeyr �
HashAlgorithmr/ �bytesr2 r5 r r r r r; H s �
� r; c @ s4 e Zd Zdd� Zdejfdd�Zdejfdd�ZdS ) �_DSAParametersc C s || _ || _d S r& )r' r )r- r � dsa_cdatar r r r/ ] s
z_DSAParameters.__init__r= c C s� | j j�d�}| j j�d�}| j j�d�}| j j�| j|||� | j �|d | j jjk� | j �|d | j jjk� | j �|d | j jjk� tj | j �
|d �| j �
|d �| j �
|d �d�S )N� BIGNUM **r ��p�q�g) r' r r r
� DSA_get0_pqgr r �NULLr �DSAParameterNumbers�
_bn_to_int)r- rF rG rH r r r �parameter_numbersa s �z _DSAParameters.parameter_numbersc C s | j �| �S r& )r' �generate_dsa_private_key)r- r r r �generate_private_keyo s z#_DSAParameters.generate_private_keyN) r8 r9 r: r/ r rK rM r? rO r r r r rB \ s rB c @ s� e Zd Zdd� Ze�d�Zdejde fdd�Z
de j fdd �Z
de jfd
d �Zde jfd d
�Zdejdejdejdefdd�Zdedejejejf defdd�Z dS )�_DSAPrivateKeyc C �p || _ || _|| _| j j�d�}| j j�||| j jj| j jj� | j �|d |jjk� | j j� |d �| _
d S �NrD r � r' r � _evp_pkeyr r r
rI rJ r � BN_num_bits� _key_size�r- r rC �evp_pkeyrF r r r r/ t s �z_DSAPrivateKey.__init__rV �signature_algorithmr= c C s t � t|� t| j| |�S r& )r r r; r' )r- rY r r r �signer� s z_DSAPrivateKey.signerc C sR | j j�d�}| j j�d�}| j j�d�}| j j�d�}| j j�d�}| j j�| j|||� | j �|d | j jjk� | j �|d | j jjk� | j �|d | j jjk� | j j�| j||� | j �|d | j jjk� | j �|d | j jjk� t j
t j t j | j �
|d �| j �
|d �| j �
|d �d�| j �
|d �d�| j �
|d �d�S )NrD r rE �rM �y)�public_numbers�x)r' r r r
rI r r rJ � DSA_get0_keyr �DSAPrivateNumbers�DSAPublicNumbersrK rL )r- rF rG rH �pub_key�priv_keyr r r �private_numbers� s. ���z _DSAPrivateKey.private_numbersc C s� | j j�| j�}| j �|| j jjk� | j j�|| j jj�}| j j� d�}| j j�
| j|| j jj� | j �|d | j jjk� | j j� |d �}| j j� ||| j jj�}| j �|dk� | j �
|�}t| j ||�S )NrD r r )r' r
�
DSAparams_dupr r r rJ �gc�DSA_freer r_ �BN_dup� DSA_set0_key�_dsa_cdata_to_evp_pkey�
_DSAPublicKey)r- rC rb � pub_key_dupr rX r r r r" � s"
�� � z_DSAPrivateKey.public_keyc C sH | j j�| j�}| j �|| j jjk� | j j�|| j jj�}t | j |�S r& )
r' r
re r r r rJ rf rg rB �r- rC r r r �
parameters� s
� z_DSAPrivateKey.parameters�encoding�format�encryption_algorithmc C s | j �|||| | j| j�S r& )r' �_private_key_bytesrT r )r- ro rp rq r r r �
private_bytes� s �z _DSAPrivateKey.private_bytesr r. c C s t | j||�\}}t| j| |�S r& )r r' r )r- r r. r r r �sign� s �z_DSAPrivateKey.signN) r8 r9 r: r/ r �read_only_property�key_sizer r@ r rZ r r` rd � DSAPublicKeyr" �
DSAParametersrn r �Encoding�
PrivateFormat�KeySerializationEncryptionrA rs �typing�Union�
asym_utils� Prehashedrt r r r r rP s s6
�
����
����rP c @ s� e Zd Zdd� Ze�d�Zdedej de
fdd�Z de j
fd d
�Zde jfd d �Zd
ejdejdefdd�Zdededejejej f fdd�ZdS )rk c C rQ rR rS rW r r r r/ � s �z_DSAPublicKey.__init__rV r# rY r= c C s* t � t�d|� t|� t| j| ||�S )Nr# )r r � _check_bytesr r% r' )r- r# rY r r r �verifier� s
�z_DSAPublicKey.verifierc C s | j j�d�}| j j�d�}| j j�d�}| j j�d�}| j j�| j|||� | j �|d | j jjk� | j �|d | j jjk� | j �|d | j jjk� | j j�| j|| j jj� | j �|d | j jjk� t j
t j | j � |d �| j � |d �| j � |d �d�| j � |d �d�S )NrD r rE r[ )
r' r r r
rI r r rJ r_ r ra rK rL )r- rF rG rH rb r r r r] � s( ���z _DSAPublicKey.public_numbersc C s2 | j j�| j�}| j j�|| j jj�}t| j |�S r& )r' r
re r r rf rg rB rm r r r rn s
� z_DSAPublicKey.parametersro rp c C s | j �||| | jd �S r& )r' �_public_key_bytesrT )r- ro rp r r r � public_bytes s �z_DSAPublicKey.public_bytesr r. c C s" t | j||�\}}t| j| ||�S r& )r r' r$ )r- r# r r. r r r r7 s �z_DSAPublicKey.verifyN)r8 r9 r: r/ r ru rv rA r r@ r
r� r ra r] rx rn r ry � PublicFormatr� r| r} r~ r r7 r r r r rk � s4
��
�
��
� ���rk )r| � cryptographyr �cryptography.exceptionsr �*cryptography.hazmat.backends.openssl.utilsr r r � cryptography.hazmat.primitivesr r �)cryptography.hazmat.primitives.asymmetricr r
r r~ r r$ r% r; rx rB r? rP rw rk r r r r �<module> s d