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Ö;jž  ã               @   sÂ   d dl Z d dlZd dlZd dlZddlmZmZmZmZm	Z	m
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mZ ejejgZdZdZdZddd	„Zd
d„ Zdd„ Zejejejƒdd d�ddd„ƒZG dd„ deƒZejdd„ ƒZdd„ ZdS )é    Né   )ÚauthÚconfigÚ	constantsÚerrorsÚ
http_utilsÚselinuxÚutilsz/usr/bin/gpgz/var/lib/kcare/gpgzrelease.content.jsonFc       	      C   s˜   t j}|rtj}tjr&td d d… }nt}xT|D ]L}y|| | ƒ}P W q0 tjk
rz } z||d krj|‚W Y d d }~X q0X q0W || }t	j
||ƒ |S )Nr   éÿÿÿÿr
   )r   Úurlopenr   Úurlopen_authr   ÚFORCE_JSON_SIG_V3ÚSIG_VERIFY_ORDERr   ÚNotFoundr	   Úsave_to_file)	ÚurlÚdstÚdo_authZurlopen_localZsig_extsZsig_extÚ	signatureZnfZsig_dst© r   ú+/usr/libexec/kcare/python/kcarectl/fetch.pyÚfetch_signature   s     
r   c               C   s$   t jjtƒs tjdjtƒdd�‚d S )Nz$No {0} present. Please install gnupgzgnupg not found)Ústatus)ÚosÚpathÚisfileÚGPG_BINr   Ú
KcareErrorÚformatr   r   r   r   Úcheck_gpg_bin)   s    r   c             C   sì   t ƒ  |jtjƒrptjjtdƒ}ytj	|| |ƒ W qè tj
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rl } ztjdj| t|ƒƒƒ‚W Y dd}~X qèX nxt|dƒ�}|jƒ }W dQ R X tjjtdƒ}ytj|| |ƒ W n8 tk
ræ } ztjdj| t|ƒƒƒ‚W Y dd}~X nX dS )a8  
    Check a file signature using the gpg tool.
    If signature is wrong BadSignatureException will be raised.

    :param file_path: path to file which signature will be checked
    :param signature: a file with the signature
    :return: True in case of valid signature
    :raises: BadSignatureException
    zroot-keys.jsonzBad Signature: {0}: {1}NÚrbzkcare_pub.key)r   Úendswithr   ÚSIG_JSONr   r   ÚjoinÚGPG_KEY_DIRÚkcsig_verifyZverifyÚErrorr   ÚBadSignatureExceptionr   ÚstrÚopenÚreadZrun_gpg_verifyÚ	Exception)Ú	file_pathr   Z	root_keysÚeÚfZsigdataZkeyringr   r   r   Úcheck_gpg_signature.   s    
*r/   é   )ÚcountÚdelayc             C   s^   t j| ƒ}tj|ƒ}tj||ƒ |r2|j| |ƒ n|rNt| |dd�}t||ƒ t	j
||ƒ |S )NT)r   )r   r   r   Úselinux_safe_tmpnamer	   r   Úcheckr   r/   r   Úrename)r   r   Zcheck_signatureÚhash_checkerÚresponseÚtmpr   r   r   r   Ú	fetch_urlM   s    


r9   c               @   s   e Zd Zdd„ Zdd„ ZdS )ÚHashCheckerc             C   s6   || _ tj|ƒjdƒd | _tjtj|ƒƒd | _d S )Nú/Úfiles)	Úcontent_filer	   Úget_patch_server_urlÚrstripÚ
url_prefixÚjsonÚloadsÚ	read_fileÚhashes)ÚselfÚbaseurlr=   r   r   r   Ú__init__^   s    zHashChecker.__init__c             C   sv   |t | jƒd … }|| jkr4tjdj|| jƒdd�‚tjt	j
|ƒƒjƒ }| j| d }||krrtjdj|||ƒƒ‚d S )Nz3Invalid checksum: {0} not found in content file {1}zinvalid checksum)r   Úsha256z<Invalid checksum: {0} has invalid checksum {1}, expected {2})Úlenr@   rD   r   r   r   r=   ÚhashlibrH   r	   Úread_file_binÚ	hexdigestr'   )rE   r   ÚfnameZcfnameZhshZexpected_hshr   r   r   r4   c   s    
zHashChecker.checkN)Ú__name__Ú
__module__Ú__qualname__rG   r4   r   r   r   r   r:   ]   s   r:   c             C   sj   t js
d S | jsd S | jtƒ}tjj|ƒs^ytt	j
| jtƒ|t jƒ W n tjk
r\   d S X t| j|ƒS )N)r   ÚUSE_CONTENT_FILE_V3rF   Ú
cache_pathÚCONTENT_FILEr   r   Úexistsr9   r	   r>   ÚUSE_SIGNATUREr   r   r:   )Úlevelr   r   r   r   Úget_hash_checkert   s    
rW   c                s   ‡ fdd„}|S )z=Enrich request with a cache key, and save it if response had.c                 sh   t jƒ }|d k	r.d|kr i |d< ||d tj< ˆ | |Ž}|jjtjƒ}|d k	rd||krdt jtj|ƒ |S )NÚheaders)r	   Úget_cache_keyr   ÚCACHE_KEY_HEADERrX   ÚgetÚatomic_writeÚCACHE_KEY_DUMP_PATH)ÚargsÚkwargsÚ	cache_keyÚrespZnew_cache_key)Úclblr   r   Úwrapper‡   s    
z$wrap_with_cache_key.<locals>.wrapperr   )rb   rc   r   )rb   r   Úwrap_with_cache_key„   s    rd   )F)FN)rJ   rA   r   r%   Ú r   r   r   r   r   r   r	   ÚSIGr"   r   r   r$   rS   r   r   r/   ÚretryÚ	check_excr'   r9   Úobjectr:   ÚcachedrW   rd   r   r   r   r   Ú<module>   s    $
