File: //usr/local/CyberCP/lib/python3.10/site-packages/paramiko/__pycache__/kex_ecdh_nist.cpython-310.pyc
o
�h� � @ s� d Z ddlmZmZmZ ddlmZ ddlmZ ddl m
Z
ddl m Z ddl
mZ ddlmZ dd lmZ ed
d �\ZZd d
� ed
d �D �\ZZG dd� d�ZG dd� de�ZG dd� de�ZdS )zQ
Ephemeral Elliptic Curve Diffie-Hellman (ECDH) key exchange
RFC 5656, Section 4
� )�sha256�sha384�sha512��byte_chr)�Message)� SSHException)�default_backend)�ec)�
serialization)�hexlify� � c C s g | ]}t |��qS � r )�.0�cr r �I/usr/local/CyberCP/lib/python3.10/site-packages/paramiko/kex_ecdh_nist.py�
<listcomp> s r c @ sL e Zd ZdZeZe�� Zdd� Z dd� Z
dd� Z dd � Z d
d � Z
d d
� ZdS )� KexNistp256zecdh-sha2-nistp256c C s || _ d| _d | _d | _d S )Nr )� transport�P�Q_C�Q_S)�selfr r r r �__init__ s
zKexNistp256.__init__c C sh | � � | jjr| j�t� d S t� }|�t� |�| j �
t j j
t jj�� | j�|� | j�t� d S �N)�_generate_key_pairr � server_mode�_expect_packet�_MSG_KEXECDH_INITr �add_byte�c_MSG_KEXECDH_INIT�
add_stringr � public_bytesr �Encoding�X962� PublicFormat�UncompressedPoint�
_send_message�_MSG_KEXECDH_REPLY)r �mr r r � start_kex s
�� zKexNistp256.start_kexc C sB | j jr
|tkr
| �|�S | j js|tkr| �|�S td�|���)Nz(KexECDH asked to handle packet type {:d})r r r �_parse_kexecdh_initr) �_parse_kexecdh_replyr �format)r �ptyper* r r r �
parse_next1 s
�zKexNistp256.parse_nextc C s: t �| jt� �| _| jjr| j�� | _d S | j�� | _ d S r )
r
�generate_private_key�curver r r r �
public_keyr r )r r r r r : s
z KexNistp256._generate_key_pairc C s> |� � }tj�| j|�| _| j�� �� }| j �
t� � | j�}t t
|�d�}t� }|�| jj| jj| jj| jj� |�|� |�|� |�| j�tjjtjj�� |� t |�� | � |�� �� � }| j� ||� | j�� � || jj!�}t� }|�"t#� |�|� |�| j�tjjtjj�� |�|� | j�$|� | j�%� d S �N� )&�
get_stringr
�EllipticCurvePublicKey�from_encoded_pointr2 r r �get_server_key�asbytesr �exchange�ECDH�intr r �add�remote_version�
local_version�remote_kex_init�local_kex_initr" r r# r r$ r% r& r' � add_mpint� hash_algo�digest�_set_K_H�
sign_ssh_data�
host_key_typer �c_MSG_KEXECDH_REPLYr( �_activate_outbound)r r* � Q_C_bytes�K_S�K�hm�H�sigr r r r, A sP ��
��
�
��
z KexNistp256._parse_kexecdh_initc C s� |� � }|� � }tj�| j|�| _|�� }| j�t� � | j�}t
t |�d�}t � }|�
| jj| jj| jj| jj� |�|� |�| j�tjjtjj�� |�|� |�|� | j� || � |� � �� � � | j� ||� | j�!� d S r4 )"r6 r
r7 r8 r2 r �
get_binaryr r; r< r= r r r> r r@ r? rB rA r" r r# r r$ r% r& r' rC rF rD r: rE � _verify_keyrJ )r r* rL � Q_S_bytesrP rM rN r r r r- n s6 ��
��
z KexNistp256._parse_kexecdh_replyN)�__name__�
__module__� __qualname__�namer rD r
� SECP256R1r2 r r+ r0 r r, r- r r r r r s -r c @ � e Zd ZdZeZe�� ZdS )� KexNistp384zecdh-sha2-nistp384N) rT rU rV rW r rD r
� SECP384R1r2 r r r r rZ � � rZ c @ rY )� KexNistp521zecdh-sha2-nistp521N) rT rU rV rW r rD r
� SECP521R1r2 r r r r r] � r\ r] N)�__doc__�hashlibr r r �paramiko.commonr �paramiko.messager �paramiko.ssh_exceptionr � cryptography.hazmat.backendsr �)cryptography.hazmat.primitives.asymmetricr
� cryptography.hazmat.primitivesr �binasciir �ranger r) r! rI r rZ r] r r r r �<module> s {