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Intended for input to or verification of, key signatures. N)Z public_blob�key_typeZkey_blob�get_name)rA rW rB rB rC �_get_key_type_and_bits� s z"AuthHandler._get_key_type_and_bitsc C sp t � }|�| jj� |�t� |�|� |�|� |�d� |�d� | �|�\}}|�|� |�|� |�� S )NrV T) r% rg r3 � session_idrf r � add_booleanrr Zasbytes)rA rW �servicer4 � algorithmrj �_�bitsrB rB rC �_get_session_blob� s z AuthHandler._get_session_blobc C s� d }| j jd k r t�� | j j }|�d� | j �� s^| j �� }|d ksRt|jt�rZt d�}|�|� � rhq�|d k r |t�� kr t d��q | � � s�| j �� }|d kr�t d�}t|jt �r�|j S |�g S )Ng�������?z5Authentication failed: transport shut down or saw EOFzAuthentication timeout.zAuthentication failed.)r3 Z auth_timeout�time�wait� is_activeZ get_exception� issubclass� __class__�EOFErrorr) �is_setrI r+ Z allowed_types)rA rT Zmax_ts�erB rB rC �wait_for_response� s. � z AuthHandler.wait_for_responsec C s� |� � }| jjr�|dkr�t� }|�t� |�|� | j�|� | jj� � \}}|r�t� }|�t � |�|� |�|� | j�|� d S | � � d S rd ) �get_textr3 rJ r% rf r rg rh � server_objectZ get_bannerr$ rn )rA rj ru r8 �languagerB rB rC �_parse_service_request s z"AuthHandler._parse_service_requestc C sF | j j}|�dd�|kr2d}| �t|�|�� d S | j j| t|��S )N�-cert-v01@openssh.comr0 z<Auth rejected: pubkey algorithm '{}' unsupported or disabled)r3 �preferred_pubkeys�replacerF r �formatZ _key_infor% )rA rv �keyblob�options�errrB rB rC �_generate_key_from_request s �z&AuthHandler._generate_key_from_requestc C s. |d }d}| � t|�|�� | � td� |S )Nr zYServer did not send a server-sig-algs list; defaulting to our first preferred algo ({!r})z�NOTE: you may use the 'disabled_algorithms' SSHClient/Transport init kwarg to disable that or other algorithms if your server does not support them!)rF r r� )rA rp �my_algos� pubkey_algo�msgrB rB rC �!_choose_fallback_pubkey_algorithm( s �z-AuthHandler._choose_fallback_pubkey_algorithmc C sR d|kr |S | � td�|�� |�d�rft�d| jj�rfd}|| j_| � td� | � td�|�� |S dd � | jj D �}| � td �|�� |s�t d ��t | jj � d td ���}d }|�r&|�d�}| � td�|�� tt|j|��}|�r|d }| � td�|�� n | � td� d}t|�|���n | �||�}|�d��rF|d7 }|| j_|S )N�rsaz0Finalizing pubkey algorithm for key of type {!r}r� z-OpenSSH_(?:[1-6]|7\.[0-7])z ssh-rsa-cert-v01@openssh.comz)OpenSSH<7.8 + RSA cert = forcing ssh-rsa!z!Agreed upon {!r} pubkey algorithmc S s g | ]}d |kr|�qS )r� rB )�.0�xrB rB rC � <listcomp>O s z:AuthHandler._finalize_pubkey_algorithm.<locals>.<listcomp>z Our pubkey algorithm list: {}zFAn RSA key was specified, but no RSA pubkey algorithms are configured!zserver-sig-algsr0 �,z Server-side algorithm list: {}r z)No common pubkey algorithms exist! Dying.z=Unable to agree on a pubkey algorithm for signing a {!r} key!)rF r r� �endswith�re�searchr3 �remote_versionZ_agreed_pubkey_algorithmr� r( r' Zserver_extensions�getr& �split�list�filter� __contains__r) r� )rA rp r� r� Zserver_algo_strZ server_algosZ agreementr� rB rB rC �_finalize_pubkey_algorithm3 sl �� � ��� �� � z&AuthHandler._finalize_pubkey_algorithmc C s� |� � }|dk�r�| �td� t� }|�t� |�| j� |�d� |�| j� | jdkr||� d� t | j �}|�|� �n>| jdkr�|� d� | � | j �\}}| �|�}|�|� |�|� | �| j d| j|�}| j �||�}|�|� �n�| jdk�r|�d � |�| j� �n�| jd k�rXt| j| j�} |�| �� � | j�|� | jj�� \} }| tk�r|| �|� | jj�� \} }| t k�r�|� � } t� }|�t � z |�| � | j | | j�� W n2 t!k �r� } z| �"| � W Y �S d } ~ X Y nX | j�|� | jj�� \} }| t#k�r�|� � } z| � | j | | j| �}W n2 t!k �rf } z| �"| � W Y �S d } ~ X Y nX |d k�rx�q�n&t� }|�t � |�|� | j�$|� �q�t%d �&t'| ���t� }|�t(� |�| �)| jj*�� n|| t+k�r�t%d ��nh| t,k�r,|�-� }|�-� }|� � }|� � t%d �&|||���n*| t.k�rD| �/|� d S t%d �&t'| ���nb| jdk�r�| jj0�r�| jj1}|�2| j� |�)| jj*�}|�|� n | jdk�r�nt%d�&| j���| j�|� n| �td�&|�� d S )Nre zuserauth is OK�ssh-connectionr9 FrV Tr[ r0 r^ zReceived Package: {}z Server returned an error tokenzCGSS-API Error: Major Status: {} Minor Status: {} Error Message: {} r` rM zUnknown auth method "{}"z!Service request "{}" accepted (?))3r� rF r r% rf r rg r4 r7 rt r& r9 rr r: r� ry � sign_ssh_datar< r- r@ � add_bytes� ssh_gss_oidsr3 rh Z packetizerZ read_messager �_parse_userauth_bannerr � get_stringr Zssh_init_sec_contextr? r. �_handle_local_gss_failurer � send_messager( r� r# r Z ssh_get_micrs r! r �get_intr �_parse_userauth_failureZ gss_kex_used� kexgss_ctxtZ set_username)rA rj ru r9 rp rx rv �blob�sig�sshgss�ptypeZmechr� Z srv_tokenZ next_tokenZ maj_statusZ min_status�err_msgZkexgss� mic_tokenrB rB rC �_parse_service_accept{ s� � �� � � �� ��� � �z!AuthHandler._parse_service_acceptc C s� t � }|tkr2| �td�|�� |�t� d| _n\| �td�|�� |�t� |� | j j � |�� |t krv|�d� n|�d� | jd7 _| j �|� | jdkr�| �� |tkr�| j �� d S )NzAuth granted ({}).TzAuth rejected ({}).F� � )r% r rF r r� rf r r5 r rg r3 r� Zget_allowed_authsr rt r> rh ro � _auth_trigger)rA r4 �method�resultrj rB rB rC �_send_auth_result s& � z AuthHandler._send_auth_resultc C s| t � }|�t� |�|j� |�|j� |�t� � |�t|j �� |j D ] }|�|d � |� |d � qJ| j � |� d S )Nr r� ) r% rf r rg �name� instructions�bytesrl �len�promptsrt r3 rh )rA �qrj �prB rB rC �_interactive_query s z AuthHandler._interactive_queryc C s� | j js<t� }|�t� |�d� |�d� | j �|� d S | jrFd S |� � }|� � }|� � }| � t d� |||�� |dkr�| � � d S | jd k r�| j|kr�| � td� | �� d S || _| j j�� }|dkr�| j j�|�}�n�|dk�r||�� }|�� }z|�d�}W n tk �r Y nX |�rh| � t d� |�� } z| �dd �} W n tk �r` Y nX t}n| j j�||�}�n�|d k�r�|�� } |� � } |�� } z| �| | �} W n� tk �r� } z | � t d � t |��� d } W 5 d }~X Y nD t k �r. } z$d }| � t |� |j j |�� d } W 5 d }~X Y nX | d k�rF| �� d S | j j�!|| �}|tk�rv| �s�t� }|�t"� |�| � |�| � | j �|� d S t|�� �}| �#| ||| �}| �$||��sv| � t d � t}�n�|dk�r|�%� }| j j�&||�}t'|t(��rv| �)|� d S �n^|dk�r�|�r�t*|�}|�+� }|dk�rV| � t d� | �� |�%� }|�,|�}|�s�| � t d� | �� |�-d�}t� }|�t.� |�/|� t0| |�| j _1t2t3t4f| j _5| j �|� d S |dk�rh|�rh|�%� }| j j6}|d k�rt}| �7|||� z|�8|| j j9| j� W n* t k �rP t}| �7|||� � Y nX t:}| j j�;||� n| j j�|�}| �7|||� d S )NrM Fz.Auth request (type={}) service={}, username={}r� zKAuth rejected because the client attempted to change username in mid-flightr9 zUTF-8z+Auth request to change passwords (rejected)r� rV z Auth rejected: public key: {}z9Auth rejected: unsupported or mangled public key ({}: {})z Auth rejected: invalid signaturer[ r^ r� z8Disconnect: Received more than one GSS-API OID mechanismz5Disconnect: Received an invalid GSS-API OID mechanism�serverr` )<r3 rJ r% rf r rg rt rh r5 r� rF r r� rn r= r ro r� Zenable_auth_gssapiZcheck_auth_none� get_boolean� get_binary�decode� UnicodeErrorr Zcheck_auth_passwordr� r( r �str� Exceptionr~ �__name__Zcheck_auth_publickeyr ry Zverify_ssh_sigr� Zcheck_auth_interactive� isinstancer, r� r- r� Zssh_check_mechr� r r� �GssapiWithMicAuthHandler� auth_handlerr r r �_expected_packetr� r� � ssh_check_micrs r Zcheck_auth_gssapi_keyex)rA rj r4 ru r� Zgss_authr� Z changereqr9 Z newpasswordZ sig_attachedrv r� rW r� r� r� r� r< r� ZmechsZ desired_mechZmech_okZsupported_mechr� rB rB rC �_parse_userauth_request% s8 �� �� � � � � � � �� � �z#AuthHandler._parse_userauth_requestc C s< | � td�| j�� d| _| j�� | jd k r8| j�� d S )Nz Authentication ({}) successful!T) rF r r� r7 r5 r3 r� r6 rb ri rB rB rC �_parse_userauth_success� s � z#AuthHandler._parse_userauth_successc C s� |� � }|�� }|rB| �td� | �tdt|� � t|�| j_nV| j |kr�d� | j �d� |�fD ]}| �t|� qbt d|�| j_n| �td� | j �� d| _ d | _ | jd k r�| j�� d S )NzAuthentication continues...z Methods: z'Authentication type ({}) not permitted.zAllowed methods: {}zBad authentication type�Authentication ({}) failed.F)Zget_listr� rF r r r� r+ r3 �saved_exceptionr7 r� r* r5 r4 r6 rb )rA rj Zauthlist�partialr� rB rB rC r� � s2 �� � � z#AuthHandler._parse_userauth_failurec C s$ |� � }|| _| �td�|�� d S )NzAuth banner: {})r� r8 rF r r� )rA rj r8 rB rB rC r� � s z"AuthHandler._parse_userauth_bannerc C s� | j dkrtd��|�� }|�� }|�� |�� }g }t|�D ]}|�|�� |�� f� q>| �|||�}t � }|� t � |� t |�� |D ]}|�|� q�| j�|� d S )Nr[ z Illegal info request from server)r7 r( r� r� r� �range�appendr� r; r% rf r rl r� rg r3 rh ) rA rj �titler� r� Z prompt_list�iZ response_list�rrB rB rC � _parse_userauth_info_request s( � z(AuthHandler._parse_userauth_info_requestc C sr | j jstd��|�� }g }t|�D ]}|�|�� � q$| j j�|�}t |t �r^| � |� d S | � | j d|� d S )Nz!Illegal info response from serverr[ )r3 rJ r( r� r� r� r� r� Z check_auth_interactive_responser� r, r� r� r= )rA rj �n� responsesr� r� rB rB rC � _parse_userauth_info_response s" � �z)AuthHandler._parse_userauth_info_responsec C sR || j _| �td�|�� | �td�| j�� d| _d | _| j d k rN| j � � d S )NzGSSAPI failure: {}r� F) r3 r� rF r r� r r7 r5 r4 r6 rb )rA r� rB rB rC r� * s z%AuthHandler._handle_local_gss_failurec C s t | jt| jt| jiS rE )r r� r r� r r� rH rB rB rC �_server_handler_table< s �z!AuthHandler._server_handler_tablec C s" t | jt| jt| jt| jt| j iS rE ) r r� r r� r r� r r� r r� rH rB rB rC �_client_handler_tableH s �z!AuthHandler._client_handler_tablec C s | j jr| jS | jS d S rE )r3 rJ r� r� rH rB rB rC �_handler_tableT s zAuthHandler._handler_tableN)r0 )'r� � __module__� __qualname__�__doc__rD rF rI rK rU rX rY r] r_ ra rc rR rn ro rr ry r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� �propertyr� r� r� rB rB rB rC r/ M sP H 2 r/ c @ s� e Zd ZdZdZdd� Zdd� Zedd� �Zed d � �Z ed d � �Z ed d� �Z dd� Z dd� Z dd� Zdd� Zdd� Zeeeeee eeiZedd� �ZdS ) r� z�A specialized Auth handler for gssapi-with-mic During the GSSAPI token exchange we need a modified dispatch table, because the packet type numbers are not unique. r^ c C s || _ || _d S rE )� _delegater� )rA Zdelegater� rB rB rC rD e s z!GssapiWithMicAuthHandler.__init__c C s | � � | j�� S rE )� _restore_delegate_auth_handlerr� rc rH rB rB rC rc i s z GssapiWithMicAuthHandler.abortc C s | j jS rE )r� r3 rH rB rB rC r3 m s z"GssapiWithMicAuthHandler.transportc C s | j jS rE )r� r� rH rB rB rC r� q s z*GssapiWithMicAuthHandler._send_auth_resultc C s | j jS rE )r� r= rH rB rB rC r= u s z&GssapiWithMicAuthHandler.auth_usernamec C s | j jS rE )r� r? rH rB rB rC r? y s z!GssapiWithMicAuthHandler.gss_hostc C s | j | j_d S rE )r� r3 r� rH rB rB rC r� } s z7GssapiWithMicAuthHandler._restore_delegate_auth_handlerc C s� |� � }| j}z|�| j|| j�}W nJ tk rn } z,|| j_t}| � � | � | j| j |� � W 5 d }~X Y nX |d k r�t � }|� t� |�|� tttf| j_| j�|� d S rE )r� r� Zssh_accept_sec_contextr? r= r� r3 r� r r� r� r� r% rf r rg r r" r r� rh )rA rj Z client_tokenr� �tokenr� r� rB rB rC � _parse_userauth_gssapi_token� s. � �z5GssapiWithMicAuthHandler._parse_userauth_gssapi_tokenc C s� |� � }| j}| j}| �� z|�|| jj|� W n@ tk rr } z"|| j_t }| � || j |� � W 5 d }~X Y nX t }| jj �||� | � || j |� d S rE )r� r� r= r� r� r3 rs r� r� r r� r� r r� Zcheck_auth_gssapi_with_mic)rA rj r� r� r4 r� r� rB rB rC �_parse_userauth_gssapi_mic� s* � �z3GssapiWithMicAuthHandler._parse_userauth_gssapi_micc C s | � � | j�|�S rE )r� r� r� ri rB rB rC r� � s z/GssapiWithMicAuthHandler._parse_service_requestc C s | � � | j�|�S rE )r� r� r� ri rB rB rC r� � s z0GssapiWithMicAuthHandler._parse_userauth_requestc C s | j S rE )�(_GssapiWithMicAuthHandler__handler_tablerH rB rB rC r� � s z'GssapiWithMicAuthHandler._handler_tableN)r� r� r� r� r� rD rc r� r3 r� r= r? r� r� r� r� r� r r r r" r� r� rB rB rB rC r� \ s8 �r� c sX e Zd ZdZe� fdd��Zddd�Zdd� Zd d � Zd d � Z ddd�Z dd� Z � Z S )�AuthOnlyHandlerzU AuthHandler, and just auth, no service requests! .. versionadded:: 3.2 c s t � j�� }|t= |S rE )�superr� �copyr )rA Zmy_table�r~ rB rC r� � s z%AuthOnlyHandler._client_handler_tableNc C sx || _ || _t� }|�t� |�|� |�d� |�|� ||� | jj� | j�|� W 5 Q R X t � � | _ | � | j �S )a� Submit a userauth request message & wait for response. Performs the transport message send call, sets self.auth_event, and will lock-n-block as necessary to both send, and wait for response to, the USERAUTH_REQUEST. Most callers will want to supply a callback to ``finish_message``, which accepts a Message ``m`` and may call mutator methods on it to add more fields. r� ) r7 r4 r% rf r rg r3 rO rh � threading�Eventr6 r� )rA r4 r� Zfinish_messagerj rB rB rC �send_auth_request� s z!AuthOnlyHandler.send_auth_requestc C s | � |d�S rL �r� )rA r4 rB rB rC rU s zAuthOnlyHandler.auth_nonec sH | � ��\}�| �|�� | ��d|� ��� ���fdd�}| �|d|�S )Nr� c s4 | � d� | �� � | ��� | ����� �� d S )NT)rt rg r� �rj �rv rx r� rW rB rC �finish s z.AuthOnlyHandler.auth_publickey.<locals>.finishrV )rr r� ry r� )rA r4 rW rp r� rB r� rC rX s � z AuthOnlyHandler.auth_publickeyc s � fdd�}| � |d|�S )Nc s | � d� | �t� �� d S )NF)rt rg r& r� �r9 rB rC r� s z-AuthOnlyHandler.auth_password.<locals>.finishr9 r� )rA r4 r9 r� rB r� rC rY s z AuthOnlyHandler.auth_passwordr0 c s& d| _ || _� fdd�}| �|d|�S )rZ Zkeyboard_interactivec s | � d� | � � � d S )Nr0 )rg r� �r< rB rC r� / s z0AuthOnlyHandler.auth_interactive.<locals>.finishr[ )r7 r; r� )rA r4 r\ r< r� rB r� rC r] % s z AuthOnlyHandler.auth_interactivec C st d}| � t|� |�dd�}||ks,||krN||kr8|n|}d|�d�}|}n|d }|�d|��}| � t|� |S )NzdServer did not send a server-sig-algs list; defaulting to something in our preferred algorithms listr� r0 zCurrent key type, z&, is in our preferred list; using thatr z3 not in our list - trying first list item instead, )rF r r� )rA rp r� r� Znoncert_key_type�actual�algorB rB rC r� 8 s z1AuthOnlyHandler._choose_fallback_pubkey_algorithm)N)r0 ) r� r� r� r� r� r� r� rU rX rY r] r� � __classcell__rB rB r� rC r� � s ) r� );r� r1 r� rz r� Zparamiko.commonr r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r! r" r# r$ Zparamiko.messager% Z paramiko.utilr& r' Zparamiko.ssh_exceptionr( r) r* r+ Zparamiko.serverr, Zparamiko.ssh_gssr- r. r/ r� r� rB rB rB rC �<module> s& �% l
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