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Tc C s || _ || _|| _d S r# )r% � _region_name� _service_name�r r% � service_name� region_namer r r r' � s zSigV4Auth.__init__Fc C s: |r t �||�d�t��� }nt �||�d�t��� }|S �Nr) )r9 r: r< r � hexdigestrD )r rK �msg�hex�sigr r r �_sign� s zSigV4Auth._signc C sR t � }|j�� D ] \}}|�� }|tvr|||< qd|vrN| �|j��� |d< |S )zk Select the headers from the request that need to be included in the StringToSign. �host)r ra �items�lower�SIGNED_HEADERS_BLACKLIST�_canonical_hostr4 )r r Z header_map�namerL �lnamer r r �headers_to_sign� s zSigV4Auth.headers_to_signc sD t |�� ddd�}t� fdd�|�� D ��r2� jS � j�dd�d S ) N�P i� )�http�httpsc 3 s& | ] \}}� j |ko � j|kV qd S r# )�scheme�port)�.0rz r{ �� url_partsr r � <genexpr>� s �z,SigV4Auth._canonical_host.<locals>.<genexpr>�@� ���)r �anyrp �hostnamer8 �rsplit)r r4 Z default_portsr r} r rs � s � �zSigV4Auth._canonical_hostc C s& |j r| �|j �S | �t|j��S d S r# )rG � _canonical_query_string_params�_canonical_query_string_urlr r4 r r r r �canonical_query_string� s z SigV4Auth.canonical_query_stringc C sN g }t |�D ]2}t|| �}|�dt|dd�t|dd�f � q d�|�}|S )N�%s=%sz-_.~r. r1 )r= �strr? r r@ )r rG �l�paramrL Zcqsr r r r� � s � z(SigV4Auth._canonical_query_string_paramsc C st d}|j rpg }|j �d�D ]"}|�d�\}}}|�||f� qg }t|�D ]\}}|�d||f � qJd�|�}|S )Nr- r1 r0 r� )�queryrH � partitionr? r= r@ ) r �partsr� Z key_val_pairs�pairrK �_rL Zsorted_key_valsr r r r� � s z%SigV4Auth._canonical_query_string_urlc s\ g }t t|��}|D ]<}d�� fdd�t |�|��D ��}|�d|t|�f � qd�|�S )a Return the headers that need to be included in the StringToSign in their canonical form by converting all header keys to lower case, sorting them in alphabetical order and then joining them into a string, separated by newlines. �,c 3 s | ]}� � |�V qd S r# )� _header_value�r| �v�r r r r � � z.SigV4Auth.canonical_headers.<locals>.<genexpr>�%s:%s� )r= �setr@ �get_allr? r )r rv ra Zsorted_header_namesrK rL r r� r �canonical_headers� s �zSigV4Auth.canonical_headersc C s d� |�� �S )N� )r@ rH )r rL r r r r� � s zSigV4Auth._header_valuec C s$ dd� t |�D �}t|�}d�|�S )Nc S s g | ]}d |� � �� �qS )z%s)rq rE )r| �nr r r � <listcomp> r� z,SigV4Auth.signed_headers.<locals>.<listcomp>�;)r� r= r@ )r rv r� r r r �signed_headers s zSigV4Auth.signed_headersc C s� | � |�stS |j}|rnt|d�rn|�� }t�|jt�}t � }t |d�D ]}|� |� qH|� � }|� |� |S |r~t |�� � S tS d S )N�seekr� )�_should_sha256_sign_payload�UNSIGNED_PAYLOAD�body�hasattr�tell� functools�partial�read�PAYLOAD_BUFFERr �iterrA rj r� �EMPTY_SHA256_HASH)r r � request_body�positionZread_chunksizeZchecksum�chunkZ hex_checksumr r r �payload s" � zSigV4Auth.payloadc C s |j �d�sdS |j�dd�S )Nry T�payload_signing_enabled)r4 � startswith�context�getr r r r r� ! s z%SigV4Auth._should_sha256_sign_payloadc C s� |j �� g}| �t|j�j�}|�|� |�| �|�� | �|�}|�| � |�d � |�| � |�� d|j v r||j d }n | � |�}|�|� d� |�S )Nr� �X-Amz-Content-SHA256)r7 �upper�_normalize_url_pathr r4 r5 r? r� rv r� r� ra r� r@ )r r �crr5 rv Z body_checksumr r r �canonical_request+ s zSigV4Auth.canonical_requestc C s t t|�dd�}|S )Nz/~r. )r r )r r5 Znormalized_pathr r r r� : s z SigV4Auth._normalize_url_pathc C sN | j jg}|�|jd dd� � |�| j� |�| j� |�d� d�|�S �N� timestampr � � aws4_requestr( )r% rT r? r� rd re r@ �r r �scoper r r r� > s zSigV4Auth.scopec C sH g }|� |jd dd� � |� | j� |� | j� |� d� d�|�S r� )r? r� rd re r@ r� r r r �credential_scopeF s zSigV4Auth.credential_scopec C sH dg}|� |jd � |� | �|�� |� t|�d���� � d�|�S )z� Return the canonical StringToSign as well as a dict containing the original version of all headers that were included in the StringToSign. �AWS4-HMAC-SHA256r� r) r� )r? r� r� r r< rj r@ )r r r� �stsr r r rI N s zSigV4Auth.string_to_signc C sd | j j}| �d| �d�|jd dd� �}| �|| j�}| �|| j�}| �|d�}| j||dd�S ) NZAWS4r) r� r r� r� T)rl )r% r; rn r< r� rd re )r rI r rK Zk_dateZk_regionZ k_serviceZ k_signingr r r rZ Z s � zSigV4Auth.signaturec C s� | j d u rt�tj�� }|�t�|jd< | �|� | �|�}t � d� t � d|� | � ||�}t � d|� | � ||�}t � d|� | � ||� d S )Nr� z$Calculating signature using v4 auth.zCanonicalRequest: %s�StringToSign: %sz Signature: %s)r% r �datetime�utcnowrV �SIGV4_TIMESTAMPr� � _modify_request_before_signingr� r2 r3 rI rZ � _inject_signature_to_request)r r � datetime_nowr� rI rZ r r r r c s zSigV4Auth.add_authc C sP d| � |� g}| �|�}|�d| �|� � |�d| � d�|�|jd< |S )Nz AWS4-HMAC-SHA256 Credential=%szSignedHeaders=%sz Signature=%sz, � Authorization)r� rv r? r� r@ ra )r r rZ r� rv r r r r� u s z&SigV4Auth._inject_signature_to_requestc C sr d|j v r|j d= | �|� | jjrDd|j v r6|j d= | jj|j d< |j�dd�snd|j v rd|j d= t|j d< d S )Nr� r` r� Tr� )ra �_set_necessary_date_headersr% rY r� r� r� r r r r r� } s z(SigV4Auth._modify_request_before_signingc C s| d|j v rV|j d= tj�|jd t�}ttt�|� � ���|j d< d|j v rx|j d= n"d|j v rh|j d= |jd |j d< d S )Nr] r� � X-Amz-Date) ra r� �strptimer� r� r �int�calendar�timegm� timetuple)r r Zdatetime_timestampr r r r� � s �� z%SigV4Auth._set_necessary_date_headersN)F)r r r r[ r! r' rn rv rs r� r� r� r� r� r� r� r� r� r� r� r� rI rZ r r� r� r� r r r r rc � s0 rc c s0 e Zd Z� fdd�Z� fdd�Zdd� Z� ZS )� S3SigV4Authc s6 t t| ��|� d|jv r"|jd= | �|�|jd< d S )Nr� )�superr� r� ra r� r �� __class__r r r� � s z*S3SigV4Auth._modify_request_before_signingc sx |j �d�}t|dd �}|d u r$i }|�dd �}|d ur<|S |j�d�rRd|jvrVdS |j �dd�rhdS tt| ��|�S ) N� client_config�s3r� ry z Content-MD5TZhas_streaming_inputF) r� r� �getattrr4 r� ra r� r� r� )r r r� Z s3_configZ sign_payloadr� r r r� � s �z'S3SigV4Auth._should_sha256_sign_payloadc C s |S r# r �r r5 r r r r� � s z S3SigV4Auth._normalize_url_path)r r r r� r� r� � __classcell__r r r� r r� � s "r� c s< e Zd ZdZef� fdd� Zdd� Zdd� Zdd � Z� ZS ) �SigV4QueryAuth� c s t t| ��|||� || _d S r# )r� r� r' �_expires)r r% rg rh �expiresr� r r r' � s �zSigV4QueryAuth.__init__c C s� |j �d�}d}||kr |j d= | �| �|��}d| �|�|jd | j|d�}| jjd urf| jj|d< t |j �}t dd� t |j d d ��� D ��}d }|jr�|�| �|�� d |_|r�t|�d }|t|� } |} | d | d | d | | d f} t| �|_ d S )N� content-typez0application/x-www-form-urlencoded; charset=utf-8r� r� )zX-Amz-AlgorithmzX-Amz-Credentialr� z X-Amz-ExpireszX-Amz-SignedHeadersr` c S s g | ]\}}||d f�qS �r r )r| �kr� r r r r� � r� zASigV4QueryAuth._modify_request_before_signing.<locals>.<listcomp>T)�keep_blank_valuesr- r1 r r� � � )ra r� r� rv r� r� r� r% rY r r4 �dictr r� rp rS rA �_get_body_as_dictr r ) r r � content_typeZblacklisted_content_typer� Z auth_paramsr~ � query_dictZoperation_params�new_query_string�p� new_url_partsr r r r� � s@ �� �� � z-SigV4QueryAuth._modify_request_before_signingc C s> |j }t|tj�r$t�|�d��}nt|tj�r:t�|�}|S ri )rS � isinstancer � binary_typer �loadsrF � string_types)r r rS r r r r� s z SigV4QueryAuth._get_body_as_dictc C s | j d| 7 _ d S )Nz&X-Amz-Signature=%s)r4 �r r rZ r r r r� s z+SigV4QueryAuth._inject_signature_to_request) r r r �DEFAULT_EXPIRESr' r� r� r� r� r r r� r r� � s �= r� c @ s e Zd ZdZdd� Zdd� ZdS )�S3SigV4QueryAutha S3 SigV4 auth using query parameters. This signer will sign a request using query parameters and signature version 4, i.e a "presigned url" signer. Based off of: http://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-query-string-auth.html c C s |S r# r r� r r r r� 0 s z$S3SigV4QueryAuth._normalize_url_pathc C s t S r# )r� r r r r r� 4 s zS3SigV4QueryAuth.payloadN)r r r r[ r� r� r r r r r� % s r� c @ s e Zd ZdZdd� ZdS )�S3SigV4PostAuthz� Presigns a s3 post Implementation doc here: http://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-UsingHTTPPOST.html c C sP t j �� }|�t�|jd< i }|j�dd �d ur:|jd }i }g }|j�dd �d urv|jd }|�dd �d urv|d }||d< d|d< | �|�|d< |jd |d< |�ddi� |�d| �|�i� |�d|jd i� | jj d u�r| jj |d < |�d | jj i� t � t � |��d ���d �|d < | �|d |�|d < ||jd< ||jd< d S ) Nr� �s3-presign-post-fields�s3-presign-post-policy� conditionsr� zx-amz-algorithmzx-amz-credentialz x-amz-date�x-amz-security-tokenr) �policyzx-amz-signature)r� r� rV r� r� r� r� r? r% rY rB rC r �dumpsr< rF rZ )r r r� �fieldsr� r� r r r r C s: �� zS3SigV4PostAuth.add_authN�r r r r[ r r r r r r� < s r� c @ st e Zd Zg d�Zddd�Zdd� Zdd� Zd d � Zd d � Zdd d�Z ddd�Z d dd�Z dd� Z dd� Z dd� ZdS ) � HmacV1Auth)#Z accelerateZaclZcorsZdefaultObjectAcl�location�loggingZ partNumberr� �requestPaymentZtorrentZ versioningZ versionId�versionsZwebsiteZuploadsZuploadIdzresponse-content-typezresponse-content-languagezresponse-expireszresponse-cache-controlz response-content-dispositionzresponse-content-encoding�deleteZ lifecycleZtaggingZrestoreZ storageClassZ notificationZ replicationr Z analyticsZmetricsZ inventory�selectz select-typeNc C s || _ d S r# r$ rf r r r r' y s zHmacV1Auth.__init__c C s> t j| jj�d�td�}|�|�d�� t|�� �� � � d�S )Nr) r* ) r9 r: r% r; r< r rA r rD rE rF )r rI rb r r r � sign_string| s �zHmacV1Auth.sign_stringc C s� g d�}g }d|v r|d= | � � |d< |D ]R}d}|D ]6}|�� }|| d ur6||kr6|�|| �� � d}q6|s*|�d� q*d�|�S )N)� content-md5r� �dater] FTr- r� )� _get_daterq r? rE r@ )r ra Zinteresting_headers�hoiZih�foundrK �lkr r r �canonical_standard_headers� s z%HmacV1Auth.canonical_standard_headersc C s� g }i }|D ]@}|� � }|| d ur |�d�r d�dd� |�|�D ��||< q t|�� �}|D ]}|�d||| f � q^d�|�S )N�x-amz-r� c s s | ]}|� � V qd S r# )rE r� r r r r � r� z6HmacV1Auth.canonical_custom_headers.<locals>.<genexpr>r� r� )rq r� r@ r� r= �keysr? )r ra r �custom_headersrK r Zsorted_header_keysr r r �canonical_custom_headers� s � z#HmacV1Auth.canonical_custom_headersc C s( t |�dkr|S |d t|d �fS dS )z( TODO: Do we need this? r� r N)r6 r )r �nvr r r � unquote_v� s zHmacV1Auth.unquote_vc s� |d ur|}n|j }|jr�|j�d�}dd� |D �}� fdd�|D �}t|�dkr�|jtd�d� dd� |D �}|d7 }|d�|�7 }|S ) Nr1 c S s g | ]}|� d d��qS )r0 r� )rH �r| �ar r r r� � r� z1HmacV1Auth.canonical_resource.<locals>.<listcomp>c s$ g | ] }|d � j v r� �|��qS r� )� QSAOfInterestr r r� r r r� � s �r )rK c S s g | ]}d � |��qS )r0 )r@ r r r r r� � r� �?)r5 r� rH r6 �sortr r@ )r rH � auth_path�bufZqsar r� r �canonical_resource� s z HmacV1Auth.canonical_resourcec C sN |� � d }|| �|�d 7 }| �|�}|r8||d 7 }|| j||d�7 }|S )Nr� �r )r� r r r )r r7 rH ra r� r �csr r r r �canonical_string� s zHmacV1Auth.canonical_stringc C sB | j jr|d= | j j|d< | j||||d�}t�d|� | �|�S )Nr� r r� )r% rY r r2 r3 r )r r7 rH ra r� r rI r r r � get_signature� s � zHmacV1Auth.get_signaturec C sX | j d u rt�t�d� t|j�}t�d|j� | j|j||j|j d�}| � ||� d S )Nz(Calculating signature using hmacv1 auth.zHTTP request method: %sr ) r% r r2 r3 r r4 r7 r ra r �_inject_signature)r r rH rZ r r r r � s �zHmacV1Auth.add_authc C s t dd�S )NTr^ r r� r r r r � s zHmacV1Auth._get_datec C s, d|j v r|j d= d| jj|f |j d< d S )Nr� z AWS %s:%s)ra r% rT r� r r r r � s �z HmacV1Auth._inject_signature)NN)N)NN)NN)r r r r r' r r r r r r r r r r r r r r r� j s � � r� c @ s0 e Zd ZdZdZefdd�Zdd� Zdd� Zd S ) �HmacV1QueryAuthz� Generates a presigned request for s3. Spec from this document: http://docs.aws.amazon.com/AmazonS3/latest/dev/RESTAuthentication.html #RESTAuthenticationQueryStringAuth r� c C s || _ || _d S r# )r% r� )r r% r� r r r r' s zHmacV1QueryAuth.__init__c C s t tt�� t| j� ��S r# )r� r� rU r� r� r r r r s zHmacV1QueryAuth._get_datec C s� i }| j j|d< ||d< |jD ]D}|�� }|dkrB|jd |d< q |�d�sT|dv r |j| ||< q t|�}t|j�}|d r�d|d |f }|d |d |d ||d f}t|�|_d S ) NrO r, r] ZExpiresr )r r� � z%s&%sr r� r� r� ) r% rT ra rq r� r r r4 r ) r r rZ r� Z header_keyr r� r� r� r r r r s z!HmacV1QueryAuth._inject_signatureN)r r r r[ r� r' r r r r r r r � s r c @ s e Zd ZdZdd� ZdS )�HmacV1PostAuthz� Generates a presigned post for s3. Spec from this document: http://docs.aws.amazon.com/AmazonS3/latest/dev/UsingHTTPPOST.html c C s� i }|j �dd �d ur |j d }i }g }|j �dd �d ur\|j d }|�dd �d ur\|d }||d< | jj|d< | jjd ur�| jj|d< |�d| jji� t�t� |�� d��� d�|d< | � |d �|d< ||j d< ||j d< d S ) Nr� r� r� rO r� r) r� rZ ) r� r� r% rT rY r? rB rC r r� r< rF r )r r r� r� r� r r r r . s, �� zHmacV1PostAuth.add_authNr� r r r r r! & s r! ) Zv2Zv4zv4-queryZv3Zv3httpsr� zs3-queryzs3-presign-postZs3v4z s3v4-queryzs3v4-presign-post)5rB r� �hashlibr r r9 r� � email.utilsr �operatorr r� rU r� r Zbotocore.exceptionsr Zbotocore.utilsr r Zbotocore.compatr r r r r r r r r r � getLoggerr r2 r� r� rW r� rr r� �objectr r" r\ rc r� r� r� r� r� r r! ZAUTH_TYPE_MAPSr r r r �<module> sn �= /Y. 2)�
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