shell bypass 403
UnknownSec Shell
:
/
usr
/
lib
/
python3
/
dist-packages
/
twisted
/
conch
/
ssh
/
__pycache__
/ [
drwxr-xr-x
]
upload
mass deface
mass delete
console
info server
name :
_kex.cpython-312.pyc
� Ϫ�fw! � �r � d Z ddlmZmZmZmZ ddlmZmZm Z ddl m Z G d� de� Z G d� de � Z G d � d e � Z G d � d e � Z e e� G d � d� � Z e e� G d� d� � Z e e� G d� d� � Z e e� G d� d� � Z e e� G d� d� � Z e e� G d� d� � Z e e� G d� d� � Z e e � G d� d � � Z e� e� e� e� e� e� e� e� d �Zd � Zd � Zd � Zd!� Z d"� Z d#� Z y$)%z SSH key exchange handling. � )�sha1�sha256�sha384�sha512)� Attribute� Interface� implementer)�errorc �0 � e Zd ZdZ ed� Z ed� Zy)�_IKexAlgorithmzB An L{_IKexAlgorithm} describes a key exchange algorithm. z�An L{int} giving the preference of the algorithm when negotiating key exchange. Algorithms with lower precedence values are more preferred.zqA callable hash algorithm constructor (e.g. C{hashlib.sha256}) suitable for use with this key exchange algorithm.N)�__name__� __module__� __qualname__�__doc__r � preference� hashProcessor� � �8/usr/lib/python3/dist-packages/twisted/conch/ssh/_kex.pyr r s) � �� � ��J� � =��Mr r c �0 � e Zd ZdZ ed� Z ed� Zy)�_IFixedGroupKexAlgorithmzu An L{_IFixedGroupKexAlgorithm} describes a key exchange algorithm with a fixed prime / generator group. zdAn L{int} giving the prime number used in Diffie-Hellman key exchange, or L{None} if not applicable.z�An L{int} giving the generator number used in Diffie-Hellman key exchange, or L{None} if not applicable. (This is not related to Python generator functions.)N)r r r r r �prime� generatorr r r r r " s) � �� � 2� �E� � '��Ir r c � � e Zd ZdZy)�#_IEllipticCurveExchangeKexAlgorithmz� An L{_IEllipticCurveExchangeKexAlgorithm} describes a key exchange algorithm that uses an elliptic curve exchange between the client and server. N�r r r r r r r r r 4 s � �r r c � � e Zd ZdZy)�_IGroupExchangeKexAlgorithmz� An L{_IGroupExchangeKexAlgorithm} describes a key exchange algorithm that uses group exchange between the client and server. A prime / generator group should be chosen at run time based on the requested size. See RFC 4419. Nr r r r r r ; s � �r r c � � e Zd ZdZdZeZy)�_Curve25519SHA256z� Elliptic Curve Key Exchange using Curve25519 and SHA256. Defined in U{https://datatracker.ietf.org/doc/draft-ietf-curdle-ssh-curves/}. � N�r r r r r r r r r r r r E � � �� �J��Mr r c � � e Zd ZdZdZeZy)�_Curve25519SHA256LibSSHzN As L{_Curve25519SHA256}, but with a pre-standardized algorithm name. � Nr" r r r r% r% P s � �� �J��Mr r% c � � e Zd ZdZdZeZy)�_ECDH256aX Elliptic Curve Key Exchange with SHA-256 as HASH. Defined in RFC 5656. Note that C{ecdh-sha2-nistp256} takes priority over nistp384 or nistp512. This is the same priority from OpenSSH. C{ecdh-sha2-nistp256} is considered preety good cryptography. If you need something better consider using C{curve25519-sha256}. � Nr" r r r r( r( Z s � � � �J��Mr r( c � � e Zd ZdZdZeZy)�_ECDH384zT Elliptic Curve Key Exchange with SHA-384 as HASH. Defined in RFC 5656. � N)r r r r r r r r r r r+ r+ k r# r r+ c � � e Zd ZdZdZeZy)�_ECDH512zT Elliptic Curve Key Exchange with SHA-512 as HASH. Defined in RFC 5656. � N)r r r r r r r r r r r. r. v r# r r. c � � e Zd ZdZdZeZy)�_DHGroupExchangeSHA256zc Diffie-Hellman Group and Key Exchange with SHA-256 as HASH. Defined in RFC 4419, 4.2. � Nr" r r r r1 r1 � r# r r1 c � � e Zd ZdZdZeZy)�_DHGroupExchangeSHA1za Diffie-Hellman Group and Key Exchange with SHA-1 as HASH. Defined in RFC 4419, 4.1. � N)r r r r r r r r r r r4 r4 � s � �� �J��Mr r4 c �, � e Zd ZdZdZeZ ed� ZdZ y)�_DHGroup14SHA1z� Diffie-Hellman key exchange with SHA-1 as HASH and Oakley Group 14 (2048-bit MODP Group). Defined in RFC 4253, 8.2. � �i 32317006071311007300338913926423828248817941241140239112842009751400741706634354222619689417363569347117901737909704191754605873209195028853758986185622153212175412514901774520270235796078236248884246189477587641105928646099411723245426622522193230540919037680524235519125679715870117001058055877651038861847280257976054903569732561526167081339361799541336476559160368317896729073178384589680639671900977202194168647225871031411336429319536193471636533209717077448227988588565369208645296636077250268955505928362751121174096972998068410554359584866583291642136218231078990999448652468262416972035911852507045361090559r& N) r r r r r r r �intr r r r r r7 r7 � s) � �� �J��M� � � �E� �Ir r7 )� curve25519-sha256s curve25519-sha256@libssh.orgs$ diffie-hellman-group-exchange-sha256s" diffie-hellman-group-exchange-sha1s diffie-hellman-group14-sha1s ecdh-sha2-nistp256s ecdh-sha2-nistp384s ecdh-sha2-nistp521c �T � | t vrt j d| � �� �t | S )aY Get a description of a named key exchange algorithm. @param kexAlgorithm: The key exchange algorithm name. @type kexAlgorithm: L{bytes} @return: A description of the key exchange algorithm named by C{kexAlgorithm}. @rtype: L{_IKexAlgorithm} @raises ConchError: if the key exchange algorithm is not found. z$Unsupported key exchange algorithm: )�_kexAlgorithmsr � ConchError�� kexAlgorithms r �getKexrA � s0 � � �>�)�� � �!E�l�^� T�U�U� �,� '�'r c �> � t j t | � � S )a Returns C{True} if C{kexAlgorithm} is an elliptic curve. @param kexAlgorithm: The key exchange algorithm name. @type kexAlgorithm: C{str} @return: C{True} if C{kexAlgorithm} is an elliptic curve, otherwise C{False}. @rtype: C{bool} )r � providedByrA r? s r �isEllipticCurverD � s � � /� 9� 9�&� �:N� O�Or c �> � t j t | � � S )a+ Returns C{True} if C{kexAlgorithm} has a fixed prime / generator group. @param kexAlgorithm: The key exchange algorithm name. @type kexAlgorithm: L{bytes} @return: C{True} if C{kexAlgorithm} has a fixed prime / generator group, otherwise C{False}. @rtype: L{bool} )r rC rA r? s r � isFixedGrouprF � s � � $� .� .�v�l�/C� D�Dr c �0 � t | � }|j S )a Get the hash algorithm callable to use in key exchange. @param kexAlgorithm: The key exchange algorithm name. @type kexAlgorithm: L{bytes} @return: A callable hash algorithm constructor (e.g. C{hashlib.sha256}). @rtype: C{callable} )rA r �r@ �kexs r �getHashProcessorrJ � s � � � � �C� � � � r c �H � t | � }|j |j fS )z� Get the generator and the prime to use in key exchange. @param kexAlgorithm: The key exchange algorithm name. @type kexAlgorithm: L{bytes} @return: A L{tuple} containing L{int} generator and L{int} prime. @rtype: L{tuple} )rA r r rH s r �getDHGeneratorAndPrimerL � s! � � � � �C� �=�=�#�)�)� #�#r c � �� ddl m} ddlm} ddlm} | � }t j � �t �� D ]� }|j d� r6|j dd� }|j |j � || � }n$|j d� r|j � }nd}|r�q�j |� �� t ��fd �� � S ) z� Get a list of supported key exchange algorithm names in order of preference. @return: A C{list} of supported key exchange algorithm names. @rtype: C{list} of L{bytes} r )�default_backend)�ec)� _curveTables ecdhs ecdsar; Tc �" �� �| j S )N)r )r@ � kexAlgorithmss �r �<lambda>z*getSupportedKeyExchanges.<locals>.<lambda>$ s �� � �l�0K�0V�0V� r )�key)� cryptography.hazmat.backendsrN �)cryptography.hazmat.primitives.asymmetricrO �twisted.conch.ssh.keysrP r= �copy�list� startswith�replace�+elliptic_curve_exchange_algorithm_supported�ECDH�x25519_supported�pop�sorted)rN rO rP �backend� keyAlgorithm�keyAlgorithmDsa� supportedrR s @r �getSupportedKeyExchangesre s� �� � =�<�2� � �G�"�'�'�)�M� �]�+� ,� � � "� "�7� +� *� 2� 2�7�H� E�O� �K�K���� �;��7��I� � $� $�%9� :� �0�0�2�I� �I�� � � �l� +� ,� ��V� � r N) r �hashlibr r r r �zope.interfacer r r � twisted.conchr r r r r r r% r( r+ r. r1 r4 r7 r= rA rD rF rJ rL re r r r �<module>ri s� �� � 1� 0� <� <� ��Y� �"�~� �$�.� ��.� � � 0�1�� � 2�� � 0�1�� � 2�� � 0�1� � � 2� � � 0�1�� � 2�� � 0�1�� � 2�� � (�)�� � *�� � (�)�� � *�� � %�&�� � '��6 ,�-�%<�%>�-C�-E�+?�+A�$2�$4�#�:�#�:�#�:� ��(�$ P� E� � $� r
© 2026 UnknownSec