o
    RDi                     @  s(  d dl mZ d dlmZ d dlmZ d dlmZmZmZ d dl	m
Z
mZ d dlmZ d dlmZ d dlmZ d d	lmZ d d
lmZ d dlmZ d dlmZ d dlmZmZmZ d dlmZ  ddl!m"Z"m#Z# ddl$m%Z% ee&Z'eG dd de
Z(G dd de
Z)eG dd dZ*G dd dZ+dS )    )annotations)defaultdict)	dataclass)datetime	timedeltatimezone)Enumunique)	getLogger)Path)Any)x509)ExtensionOID)default_backend)serialization)ecpaddingrsa)
Connection   )CRLCacheEntryCRLCacheManager)SessionManagerc                   @     e Zd ZdZdZdZdZdS )CertRevocationCheckModea  Certificate revocation check modes based on revocation lists (CRL)

    CRL mode descriptions:
        DISABLED: No revocation check is done.
        ENABLED: Revocation check is done in the strictest way. The endpoint must expose at least one fully valid
            certificate chain. Any check error invalidate the chain.
        ADVISORY: Revocation check is done in a more relaxed way. Only a revocated certificate can invalidate
            the chain. An error is treated positively (as a successful check).
    DISABLEDENABLEDADVISORYN)__name__
__module____qualname____doc__r   r   r    r"   r"   P/var/www/Datamplify/venv/lib/python3.10/site-packages/snowflake/connector/crl.pyr      s
    
r   c                   @  r   )CRLValidationResultz1Certificate revocation validation result statusesREVOKED	UNREVOKEDERRORN)r   r   r    r!   r%   r&   r'   r"   r"   r"   r#   r$   *   s
    r$   c                   @  s   e Zd ZU dZejZded< dZded< dZ	ded	< dZ
ded
< eddZded< dZded< dZded< dZded< dZded< dZded< dZded< dZded< dZded< ed ddZdS )!	CRLConfigz0Configuration class for CRL validation settings.r   cert_revocation_check_modeFbool"allow_certificates_without_crl_urli  intconnection_timeout_msread_timeout_ms   hoursr   cache_validity_timeTenable_crl_cacheenable_crl_file_cacheNzPath | str | Nonecrl_cache_dir   crl_cache_removal_delay_daysr    crl_cache_cleanup_interval_hourscrl_cache_start_cleanupi  crl_download_max_size"unsafe_skip_file_permissions_checkreturnc                 C  s  |j du r	| j }nAt|j tr0zt|j }W n3 ty/   td|j  d| j   | j }Y nw t|j tr:|j }ntd|j  d| j   | j }|jdu rR| jnt	t
|jd}|jdu rb| jnt|j}|jdu ro| jnt|j}|jdu r|| jnt|j}|jdu r| jnt|j}|jdu r| jnt|j}|jdu r| jnt|j}	|jdu r| jnt|j}
|jdu r| jnt|j}|jdu r| jnt|j}|jdu r| jnt|j}t|j}| |||||||	||
||||dS )a  
        Create a CRLConfig instance from a SnowflakeConnection instance.

        This method extracts CRL configuration parameters from the connection's
        read-only properties and creates a CRLConfig instance.

        Args:
            sf_connection: SnowflakeConnection instance containing CRL configuration

        Returns:
            CRLConfig: Configured CRLConfig instance

        Raises:
            ValueError: If session_manager is not available in the connection
        Nz$Invalid cert_revocation_check_mode: z, defaulting to z2Unsupported value for cert_revocation_check_mode: r0   )r)   r+   r-   r.   r2   r3   r4   r5   r7   r8   r9   r:   r;   )r)   
isinstancestrr   
ValueErrorloggerwarningcrl_cache_validity_hoursr2   r   floatr5   r   r+   r*   crl_connection_timeout_msr-   r,   crl_read_timeout_msr.   r3   r4   r7   r8   r9   r:   #_unsafe_skip_file_permissions_check)clssf_connectionr)   r2   r5   r+   r-   r.   r3   r4   r7   r8   r9   r:   r;   r"   r"   r#   from_connectionF   s   














zCRLConfig.from_connection)r<   r(   )r   r   r    r!   r   r   r)   __annotations__r+   r-   r.   r   r2   r3   r4   r5   r7   r8   r9   r:   r;   classmethodrI   r"   r"   r"   r#   r(   2   s$   
 
r(   c                   @  sD  e Zd Zejejejejejdej	fddddZ
ededdZdfddZdgd"d#Zdhd%d&Zdid(d)Zdjd+d,Zedkd-d.Zedld0d1Zedhd2d3Zdmd4d5Zdmd6d7Zedhd8d9Zednd;d<Zdod@dAZdpdGdHZdqdJdKZdrdMdNZdsdQdRZdtdTdUZdudVdWZ dvdXdYZ!dwdZd[Z"dxd\d]Z#dyd`daZ$dzdbdcZ%dS ){CRLValidatorNsession_managerSessionManager | Anytrusted_certificateslist[x509.Certificate]r)   r   r+   r*   r-   r,   r.   r2   r   cache_managerCRLCacheManager | Noner:   c
                 C  sh   || _ || _|| _|| _|| _|| _|pt | _|	| _	t
t| _|D ]}
| j|
j |
 q#i | _d S N)_session_manager_cert_revocation_check_mode#_allow_certificates_without_crl_url_connection_timeout_ms_read_timeout_ms_cache_validity_timer   noop_cache_manager_crl_download_max_sizer   list_trusted_casubjectappend/_cache_for__validate_certificate_is_not_revoked)selfrM   rO   r)   r+   r-   r.   r2   rQ   r:   certr"   r"   r#   __init__   s   
zCRLValidator.__init__configr(   r   r<   c                 C  s   d}|j rCddlm} ||j}|jr%t|jd}|j|j	||j
d}n	ddlm}	 |	 }t||d}|jrBt|jd}
||
 nt }| |||j|j|j|j|j||jd		S )
a  
        Create a CRLValidator instance from a CRLConfig.

        This method creates a CRLValidator and its underlying objects (except session_manager)
        from configuration parameters found in the CRLConfig.

        Args:
            config: CRLConfig instance containing CRL-related parameters
            session_manager: SessionManager instance
            trusted_certificates: List of trusted CA certificates

        Returns:
            CRLValidator: Configured CRLValidator instance
        Nr   )CRLCacheFactorydays)	cache_dirremoval_delayr;   )NoopCRLCache)memory_cache
file_cacher0   )	rM   rO   r)   r+   r-   r.   r2   rQ   r:   )r3   snowflake.connector.crl_cacherf   get_memory_cacher2   r4   r   r7   get_file_cacher5   r;   rk   r   r9   r8   start_periodic_cleanuprZ   r)   r+   r-   r.   r:   )rG   re   rM   rO   rQ   rf   rl   rj   rm   rk   cleanup_intervalr"   r"   r#   from_config   sF   
zCRLValidator.from_config	peer_certx509.Certificatechainlist[x509.Certificate] | Nonec                 C  sT   | j tjkrdS |dur|ng }| ||}|tjkrdS |tjkr$dS | j tjkS )aR  
        Validate a certificate chain against CRLs with actual HTTP requests

        Args:
            peer_cert: The peer certificate to validate (e.g., server certificate)
            chain: Certificate chain to use for validation (can be None or empty)

        Returns:
            True if validation passes, False otherwise
        TNF)rU   r   r   _validate_chainr$   r&   r%   r   )rb   rt   rv   resultr"   r"   r#   validate_certificate_chain#  s   

z'CRLValidator.validate_certificate_chain
start_certr$   c                   s    |std|j tjS tt|D ]"}|s#td| q |s/td| q|j 	| qt
  d fdd	|S )a>  
        Validate a certificate chain starting from start_cert.

        Args:
            start_cert: The certificate to start validation from
            chain: List of certificates to use for building the trust path

        Returns:
          UNREVOKED: If there is a path to any trusted certificate where all certificates are unrevoked.
          REVOKED: If all paths to trusted certificates are revoked.
          ERROR: If there is a path to any trusted certificate on which none certificate is revoked,
             but some certificates can't be verified.
        z1Start certificate is expired or not yet valid: %szIgnoring non-CA certificate: %sz2Ignoring certificate not within validity dates: %src   ru   r<   CRLValidationResult | Nonec                   s<   | rtd| j tjS |  }r#td| j | |S | j v r*d S g }| j D ]8}	| |s@td|  q1 
| j |} | j |d u rUq1|tjkrb| |  S |||f q1t|dkrztd| j tjS |D ]\}}|tjkr| |}|tjkrtj  S tj  S q|tjS )NzFound trusted certificate: %sz$Certificate signed by trusted CA: %szICertificate signature verification failed for %s, looking for other pathsr   z"No path towards trusted anchor: %s)_is_certificate_trusted_by_osr@   debugr_   r$   r&   _get_trusted_ca_issuer/_validate_certificate_is_not_revoked_with_cacheissuer_verify_certificate_signatureaddremover`   lenr'   r%   )rc   trusted_ca_issuervalid_resultsca_cert	ca_resultcert_resultcurrently_visited_subjectsrb   subject_certificatestraverse_chainr"   r#   r   c  sR   






	z4CRLValidator._validate_chain.<locals>.traverse_chainN)rc   ru   r<   r|   )_is_within_validity_datesr@   rA   r_   r$   r'   r   r]   _is_ca_certificater`   set)rb   r{   rv   rc   r"   r   r#   rx   =  s*   


;zCRLValidator._validate_chainrc   c                   s<   |j | jvrdS |tjj t fdd| j|j  D S )NFc                 3  s"    | ]} | tjjkV  qd S rS   )public_bytesr   EncodingDER).0trusted_certcert_derr"   r#   	<genexpr>  s
    
z=CRLValidator._is_certificate_trusted_by_os.<locals>.<genexpr>)r_   r^   r   r   r   r   any)rb   rc   r"   r   r#   r}     s   
z*CRLValidator._is_certificate_trusted_by_osx509.Certificate | Nonec                 C  s*   | j |j D ]}| ||r|  S qd S rS   )r^   r   r   )rb   rc   r   r"   r"   r#   r     s
   z#CRLValidator._get_trusted_ca_issuerr   c                 C  s&   z| | W dS  ty   Y dS w )NTF)verify_directly_issued_by	Exceptionrb   rc   r   r"   r"   r#   r     s   
z*CRLValidator._verify_certificate_signaturec                 C  s0   z| j tjj}|jW S  tjy   Y dS w )NF)
extensionsget_extension_for_oidr   BASIC_CONSTRAINTSvaluecar   ExtensionNotFound)r   basic_constraintsr"   r"   r#   r     s   zCRLValidator._is_ca_certificatetuple[datetime, datetime]c                 C  sv   z| j }| j}W ||fS  ty:   | j}| j}|jd u r$|jtjd}|jd u r5|jtjd}Y ||fS Y ||fS w )Ntzinfo)	not_valid_before_utcnot_valid_after_utcAttributeErrornot_valid_beforenot_valid_afterr   replacer   utc)rc   r   r   r"   r"   r#   _get_certificate_validity_dates  s   

z,CRLValidator._get_certificate_validity_datesc                 C  s2   t | \}}ttj}||  ko|kS   S rS   )rL   r   r   nowr   r   )rc   r   r   r   r"   r"   r#   r     s   z&CRLValidator._is_within_validity_datesc                 C  s&   || j vr| ||| j |< | j | S rS   )ra   $_validate_certificate_is_not_revokedr   r"   r"   r#   r     s   


z<CRLValidator._validate_certificate_is_not_revoked_with_cachec                 C  s   |  |rtjS | |}|s| jrtjS tjS g }|D ]}| |||}|tjkr.|  S || qt	dd |D r@tjS tjS )z)Validate a single certificate against CRLc                 s  s    | ]}|t jkV  qd S rS   )r$   r'   )r   ry   r"   r"   r#   r     s    zDCRLValidator._validate_certificate_is_not_revoked.<locals>.<genexpr>)
_is_short_lived_certificater$   r&    _extract_crl_distribution_pointsrV   r'   "_check_certificate_against_crl_urlr%   r`   all)rb   rc   r   crl_urlsresultscrl_urlry   r"   r"   r#   r     s    


z1CRLValidator._validate_certificate_is_not_revokedc                 C  sN   t | \}}|| tdd }tdddtjd}||kr"|jdkS |jdkS )	aX  Check if certificate is short-lived according to CA/Browser Forum definition:
        - For certificates issued on or after 15 March 2024 and prior to 15 March 2026:
          validity period <= 10 days (864,000 seconds)
        - For certificates issued on or after 15 March 2026:
          validity period <= 7 days (604,800 seconds)
        r   rg   i        r   r6   
   )rL   r   r   r   r   r   rh   )rc   
issue_dateexpiry_datevalidity_periodmarch_15_2026r"   r"   r#   r     s   

z(CRLValidator._is_short_lived_certificate	list[str]c                 C  sh   z'| j tjj}g }|D ]}|jr$|jD ]}t|tjr#|	|j qq|W S  tj
y3   g  Y S w )z4Extract CRL distribution point URLs from certificate)r   r   r   CRL_DISTRIBUTION_POINTSr   	full_namer=   r   UniformResourceIdentifierr`   r   )rc   crl_dist_pointsurlspointnamer"   r"   r#   r     s"   
z-CRLValidator._extract_crl_distribution_pointsr   r>   CRLCacheEntry | Nonec                 C  s   | j |S rS   )r[   get)rb   r   r"   r"   r#   _get_crl_from_cache/  s   z CRLValidator._get_crl_from_cachecrlx509.CertificateRevocationListtsr   Nonec                 C  s   | j ||| d S rS   )r[   put)rb   r   r   r   r"   r"   r#   _put_crl_to_cache2  s   zCRLValidator._put_crl_to_cachebytes | Nonec                 C  s  zzt d| | jj|| j| jfdd}|  |jd}|rIzt|}|| j	kr7t 
d||| j	 W W d S W n tyH   t d|| Y nw g }d}|jdd	D ]!}|sXqS|t|7 }|| j	krot 
d
|| j	  W d S || qSd|W S  ty   t d| Y d S w )NzTrying to download CRL from: %sT)timeoutstreamzContent-Lengthz<CRL from %s exceeds maximum size limit (%d bytes > %d bytes)z(Invalid Content-Length header for %s: %sr   i    )
chunk_sizezBCRL from %s exceeded maximum size limit during download (%d bytes)    zFailed to download CRL from %s)r@   r~   rT   r   rW   rX   raise_for_statusheadersr,   r\   rA   r?   iter_contentr   r`   joinr   	exception)rb   r   responsecontent_lengthsizechunks
total_sizechunkr"   r"   r#   _fetch_crl_from_url7  s^   


z CRLValidator._fetch_crl_from_urldatetime | Nonec                 C  s(   z|j W S  ty   t|dd Y S w )z
        Get the last_update timestamp from a CRL.

        Args:
            crl: The CRL to extract the timestamp from

        Returns:
            The last_update timestamp, or None if not available
        last_updateN)last_update_utcr   getattr)rb   r   r"   r"   r#   _get_crl_last_updatek  s
   z!CRLValidator._get_crl_last_updatenew_crl
cached_crlc                 C  sH   |  |}|  |}|du rtd dS |du r td dS ||kS )a  
        Check if a newly downloaded CRL is more recent than a cached CRL.

        Args:
            new_crl: The newly downloaded CRL
            cached_crl: The cached CRL

        Returns:
            True if new_crl is more recent (has a later last_update), False otherwise
        Nz$New CRL has no last_update timestampFz'Cached CRL has no last_update timestampT)r   r@   rA   )rb   r   r   new_last_updatecached_last_updater"   r"   r#   _is_crl_more_recent|  s   



z CRLValidator._is_crl_more_recent=tuple[x509.CertificateRevocationList | None, datetime | None]c                 C  s   |  |ttj}}z>td| tj|t	 d}z|j
}W n ty,   |j}Y nw |s8td| W dS ||krFtd|| W dS ||fW S  tyZ   td| Y dS w )NzTrying to parse CRL from: %s)backendz(CRL from %s has no next_update timestamp)NNz!The CRL from %s was expired on %szFailed to parse CRL from %s)r   r   r   r   r   r@   r~   r   load_der_x509_crlr   next_update_utcr   next_updaterA   r   r   )rb   r   	crl_bytesr   r   r   r"   r"   r#   _download_crl  s,   


zCRLValidator._download_crlc           	      C  sH  t tj}td| | |}|du s!||s!||| j	rctd | 
|\}}|durb|durb|du p?| ||j}td|du | |rY| ||| td| ntd| |j}n|j}|du rmtjS |j|jkrtd|j|j| tjS | ||std| tjS | ||std	| tjS | ||S )
zDCheck if certificate is revoked according to CRL by the provided URLzTrying to get cached CRL for %sNz7Cached CRL is None/expired/evicted, downloading new CRLzGIs downloaded CRL more recent? cached_crl is None=%s, is_more_recent=%sz"Cached newly downloaded CRL for %szPDownloaded CRL for %s is not more recent than cached version, keeping cached CRLzFCRL issuer (%s) does not match CA certificate subject (%s) for URL: %sz-CRL signature verification failed for URL: %sz0CRL URL does not match IDP extension for URL: %s)r   r   r   r   r@   r~   r   is_crl_expired_byis_evicted_byrY   r   r   r   r   infor$   r'   r   r_   rA   _verify_crl_signature_verify_against_idp_extension_check_certificate_against_crl)	rb   rc   r   r   r   r   r   r   is_more_recentr"   r"   r#   r     s\   

z/CRLValidator._check_certificate_against_crl_urlc              
   C  s   zH|j }|j}td|| | }t|tjr%||j	|j
t | nt|tjr8||j	|j
t| n	||j	|j
| td W dS  tya } ztd| W Y d}~dS d}~ww )z)Verify CRL signature with CA's public keyz4Verifying CRL signature with algorithm: %s, hash: %sz%CRL signature verification successfulTz%CRL signature verification failed: %sNF)signature_algorithm_oidsignature_hash_algorithmr@   r~   
public_keyr=   r   RSAPublicKeyverify	signaturetbs_certlist_bytesr   PKCS1v15r   EllipticCurvePublicKeyECDSAr   rA   )rb   r   r   signature_algorithmhash_algorithmr   er"   r"   r#   r     sD   
z"CRLValidator._verify_crl_signaturec              
   C  s   t d| z:|jtj}|j}|jst d| W dS |jD ]}t|t	j
r7|j|kr7t d|  W dS q t d| W dS  t	jyQ   t d| Y dS  tyi } zt d| W Y d }~dS d }~ww )	Nz:Trying to verify CRL URL against IDP extension for URL: %sz4IDP extension has no full_name - treating as invalidFz!CRL URL matches IDP extension: %sTz4CRL URL %s does not match any IDP distribution pointz<No IDP extension found in CRL, treating as valid for URL: %sz"Failed to verify IDP extension: %s)r@   r~   r   r   r   ISSUING_DISTRIBUTION_POINTr   r   r=   r   r   rA   r   r   )rb   r   r   idp_extensionidpr   r  r"   r"   r#   r   &  sD   

z*CRLValidator._verify_against_idp_extensionc                 C  s   | |j}|rtjS tjS )z0Check if certificate is revoked according to CRL)(get_revoked_certificate_by_serial_numberserial_numberr$   r%   r&   )rb   rc   r   revoked_certr"   r"   r#   r   T  s   z+CRLValidator._check_certificate_against_crl
connectionSSLConnectionc              
   C  s   z"|j dd}|du rtd | jtjkW S | |}| ||W S  ty@ } ztd| | jtjkW  Y d}~S d}~ww )am  
        Validate an OpenSSL connection against CRLs.

        This method extracts the peer certificate and certificate chain from the
        connection and validates them against Certificate Revocation Lists (CRLs).

        Args:
            connection: OpenSSL connection object

        Returns:
            True if validation passes, False otherwise
        Tas_cryptographyNz'No peer certificate found in connectionz!Failed to validate connection: %s)	get_peer_certificater@   rA   rU   r   r   *_extract_certificate_chain_from_connectionrz   r   )rb   r  rt   
cert_chainr  r"   r"   r#   validate_connection_  s   


z CRLValidator.validate_connectionc              
   C  sj   z|j dd}|std W dS tdt| |W S  ty4 } ztd| W Y d}~dS d}~ww )zExtract certificate chain from OpenSSL connection for CRL validation.

        Args:
            connection: OpenSSL connection object

        Returns:
            Certificate chain as a list of x509.Certificate objects, or None on error
        Tr  z(No certificate chain found in connectionNz,Extracted %d certificates for CRL validationz:Failed to extract certificate chain for CRL validation: %s)get_peer_cert_chainr@   r~   r   r   rA   )rb   r  r  r  r"   r"   r#   r  }  s    
z7CRLValidator._extract_certificate_chain_from_connection)rM   rN   rO   rP   r)   r   r+   r*   r-   r,   r.   r,   r2   r   rQ   rR   r:   r,   )re   r(   rM   r   rO   rP   r<   rL   )rt   ru   rv   rw   r<   r*   )r{   ru   rv   rP   r<   r$   )rc   ru   r<   r*   )rc   ru   r<   r   )rc   ru   r   ru   r<   r*   )r   ru   r<   r*   )rc   ru   r<   r   )rc   ru   r   ru   r<   r$   )rc   ru   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   )rc   ru   r   ru   r   r>   r<   r$   )r   r   r   ru   r<   r*   )r   r   r   r>   r<   r*   )rc   ru   r   r   r<   r$   )r  r  r<   r*   )r<   rw   )&r   r   r    r(   r)   r+   r-   r.   r2   r:   rd   rK   rs   rz   rx   r}   r   r   staticmethodr   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r  r  r"   r"   r"   r#   rL      sP    
D

c


	






4



A
0
.
rL   N),
__future__r   collectionsr   dataclassesr   r   r   r   enumr   r	   loggingr
   pathlibr   typingr   cryptographyr   cryptography.hazmat._oidr   cryptography.hazmat.backendsr   cryptography.hazmat.primitivesr   )cryptography.hazmat.primitives.asymmetricr   r   r   OpenSSL.SSLr   r  	crl_cacher   r   rM   r   r   r@   r   r$   r(   rL   r"   r"   r"   r#   <module>   s0    