a
    `mgX                     @   sd  d dl Z d dlZd dlmZ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mZ d dlmZmZ d dlmZmZmZ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# d dl$m%Z% ddl&m'Z' ddl(m)Z)m*Z* ddl+m,Z,m-Z-m.Z.m/Z/m0Z0 ddl1m2Z2 da3dd Z4G dd de2Z5G dd de2Z6G dd de2Z7G dd de2Z8dS )    N)InvalidSignature
InvalidTag)default_backend)Binding)hasheshmacserialization)ecpaddingrsa)decode_dss_signatureencode_dss_signature)Cipheraead
algorithmsmodes)InvalidUnwrapaes_key_unwrapaes_key_wrap)PKCS7)load_pem_private_keyload_pem_public_key)int_to_bytes)load_pem_x509_certificate   )
ALGORITHMS)JWEErrorJWKError)base64_to_longbase64url_decodebase64url_encodeensure_binarylong_to_base64   )Keyc                 C   sD   t du rt a t jd| }t j||  t j|| dd }|S )aK  
    Get random bytes

    Currently, Cryptography returns OS random bytes. If you want OpenSSL
    generated random bytes, you'll have to switch the RAND engine after
    initializing the OpenSSL backend
    Args:
        num_bytes (int): Number of random bytes to generate and return
    Returns:
        bytes: Random bytes
    Nzchar[])_bindingr   ffinewlib
RAND_bytesbuffer)	num_bytesbufZ
rand_bytes r-   Y/var/www/html/idle/venv/lib/python3.9/site-packages/jose/backends/cryptography_backend.pyget_random_bytes   s    r/   c                   @   sz   e Zd ZejZejZejZefddZdd Z	dd Z
dd Zd	d
 Zdd Zdd Zdd Zdd Zdd Zdd ZdS )CryptographyECKeyc              
   C   s<  |t jvrtd| t j| jt j| jt j| ji	|| _
|| _|| _t|dsZt|drd|| _d S t|dr|| d}t|tr| || _d S t|tr|d}t|tr,z<zt||  }W n$ ty   t|d |  d}Y n0 W n. ty  } zt|W Y d }~n
d }~0 0 || _d S td| d S )N*hash_alg: %s is not a valid hash algorithmpublic_bytesprivate_bytesto_pemutf-8passwordbackendz%Unable to parse an ECKey from key: %s)r   ECr   ZES256SHA256ZES384SHA384ZES512SHA512gethash_alg
_algorithmcryptography_backendhasattrprepared_keyr4   decode
isinstancedict_process_jwkstrencodebytesr   
ValueErrorr   	Exceptionselfkey	algorithmr@   er-   r-   r.   __init__5   s>    




zCryptographyECKey.__init__c                    s     ddks td  d t fdddD s>tdt  d}t  d	}tjtjtjd
 d  }t||| }d v rt  d}t	||}|
|  S ||  S d S )Nktyr9   z0Incorrect key type. Expected: 'EC', Received: %sc                 3   s   | ]}| v V  qd S Nr-   .0kjwk_dictr-   r.   	<genexpr>f       z1CryptographyECKey._process_jwk.<locals>.<genexpr>)xycrvz Mandatory parameters are missingr[   r\   )P-256P-384P-521r]   d)r=   r   allr   r	   Z	SECP256R1Z	SECP384R1Z	SECP521R1ZEllipticCurvePublicNumbersZEllipticCurvePrivateNumbersprivate_keyr@   
public_key)rM   rX   r[   r\   curvepublicra   privater-   rW   r.   rF   b   s$    zCryptographyECKey._process_jwkc                 C   s   t t| jjd S )zDetermine the correct serialization length for an encoded signature component.

        This is the number of bytes required to encode the maximum key value.
        g       @)intmathceilrB   key_sizerM   r-   r-   r.   _sig_component_length{   s    z'CryptographyECKey._sig_component_lengthc                 C   s(   t |\}}|  }t||t|| S )z4Convert signature from DER encoding to RAW encoding.)r   rm   r   )rM   Zder_signaturerscomponent_lengthr-   r-   r.   _der_to_raw   s    zCryptographyECKey._der_to_rawc                 C   s^   |   }t|td| kr$td|d| }||d }t|d}t|d}t||S )z4Convert signature from RAW encoding to DER encoding.r   zInvalid signatureNbig)rm   lenrh   rJ   
from_bytesr   )rM   Zraw_signaturerp   Zr_bytesZs_bytesrn   ro   r-   r-   r.   _raw_to_der   s    zCryptographyECKey._raw_to_derc                 C   sV   | j jd | jjjkr4td| jjjd| j j f | j|t	|   }| 
|S )N   z1this curve (%s) is too short for your digest (%d))r>   digest_sizerB   re   rk   	TypeErrornamesignr	   ECDSArq   )rM   msg	signaturer-   r-   r.   rz      s    zCryptographyECKey.signc                 C   sD   z*|  |}| j||t|   W dS  ty>   Y dS 0 d S )NTF)ru   rB   verifyr	   r{   r>   rK   )rM   r|   sigr}   r-   r-   r.   r~      s    
zCryptographyECKey.verifyc                 C   s   t | jdS Nr2   rA   rB   rl   r-   r-   r.   	is_public   s    zCryptographyECKey.is_publicc                 C   s    |   r| S | | j | jS rS   r   	__class__rB   rd   r?   rl   r-   r-   r.   rd      s    zCryptographyECKey.public_keyc                 C   sF   |   r$| jjtjjtjjd}|S | jjtjjtj	j
t d}|S )Nencodingformatr   r   Zencryption_algorithm)r   rB   r2   r   EncodingPEMPublicFormatSubjectPublicKeyInfor3   PrivateFormatTraditionalOpenSSLNoEncryption)rM   pemr-   r-   r.   r4      s    zCryptographyECKey.to_pemc                 C   s   |   s| j }n| j}dddd| jjj }| jjjd d }| jd|t| j	|d
d	t| j|d
d	d
}|   s| j j}t||d
d	|d< |S )Nr^   r_   r`   )Z	secp256r1Z	secp384r1Z	secp521r1   rv   r9   )sizeASCII)algrR   r]   r[   r\   ra   )r   rB   rd   re   ry   rk   r?   r"   public_numbersr[   rC   r\   private_numbersprivate_value)rM   rd   r]   rk   datar   r-   r-   r.   to_dict   s(    	zCryptographyECKey.to_dictN)__name__
__module____qualname__r   r:   r;   r<   r   rQ   rF   rm   rq   ru   rz   r~   r   rd   r4   r   r-   r-   r-   r.   r0   0   s   -	r0   c                   @   s   e Zd ZejZejZejZe Z	e
ee e dZe
ee e dZefddZdd Zdd Zdd	 Zd
d Zdd Zdd ZdddZdd Zdd Zdd ZdS )CryptographyRSAKeyNc              
   C   sb  |t jvrtd| t j| jt j| jt j| ji	|| _
|| _t j| jt j| jt j| ji	|| _|| _t|drt|dr|| _d S t|tr| || _d S t|tr|d}t|trRz\|dr| | W d S zt||  | _W n( ty   t|d |  d| _Y n0 W n. tyL } zt|W Y d }~n
d }~0 0 d S td| d S )Nr1   r2   r   r5      -----BEGIN CERTIFICATE-----r6   z'Unable to parse an RSA_JWK from key: %s)r   RSAr   ZRS256r:   ZRS384r;   ZRS512r<   r=   r>   r?   RSA1_5RSA_OAEPRSA_OAEP_256r
   r@   rA   rB   rD   rE   rF   rG   rH   rI   
startswith_process_certr   rJ   r   rK   rL   r-   r-   r.   rQ      sJ    





zCryptographyRSAKey.__init__c              	      sF    ddks td  d t  dd}t  d}t||}d vr`||  S t  d}g d}t fd	d
|D rt fdd
|D stdt d }t d }t d }	t d }
t d }n6t	|||\}}t
||}	t||}
t||}t||||	|
||}||  S d S )NrR   r   z1Incorrect key type. Expected: 'RSA', Received: %srP      nra   )pqdpdqqic                 3   s   | ]}| v V  qd S rS   r-   rT   rW   r-   r.   rY   "  rZ   z2CryptographyRSAKey._process_jwk.<locals>.<genexpr>c                 3   s   | ]}| v V  qd S rS   r-   rT   rW   r-   r.   rY   $  rZ   z2Precomputed private key parameters are incomplete.r   r   r   r   r   )r=   r   r   r   ZRSAPublicNumbersrd   r@   anyrb   Zrsa_recover_prime_factorsZrsa_crt_dmp1Zrsa_crt_dmq1Zrsa_crt_iqmpZRSAPrivateNumbersrc   )rM   rX   rP   r   rf   ra   Zextra_paramsr   r   r   r   r   rg   r-   rW   r.   rF     s.    zCryptographyRSAKey._process_jwkc                 C   s   t ||  }| | _d S rS   )r   r@   rd   rB   )rM   rN   r-   r-   r.   r   ;  s    z CryptographyRSAKey._process_certc              
   C   sN   z| j |t |  }W n, tyH } zt|W Y d }~n
d }~0 0 |S rS   )rB   rz   r
   PKCS1v15r>   rK   r   )rM   r|   r}   rP   r-   r-   r.   rz   ?  s
    zCryptographyRSAKey.signc                 C   sP   |   std z$|  j||t |   W dS  t	yJ   Y dS 0 d S )NzKAttempting to verify a message with a private key. This is not recommended.TF)
r   warningswarnrd   rB   r~   r
   r   r>   r   )rM   r|   r   r-   r-   r.   r~   F  s    
zCryptographyRSAKey.verifyc                 C   s   t | jdS r   r   rl   r-   r-   r.   r   P  s    zCryptographyRSAKey.is_publicc                 C   s    |   r| S | | j | jS rS   r   rl   r-   r-   r.   rd   S  s    zCryptographyRSAKey.public_keyPKCS8c                 C   s   |   rP|dkrtjj}n|dkr,tjj}ntd| | jjtjj	|d}|S |dkrbtj
j}n|dkrttj
j}ntd| | jjtjj	|t dS )Nr   PKCS1zInvalid format specified: %rr   r   )r   r   r   r   r   rJ   rB   r2   r   r   r   r   r   r3   r   )rM   Z
pem_formatfmtr   r-   r-   r.   r4   X  s     



zCryptographyRSAKey.to_pemc              
   C   s   |   s| j }n| j}| jdt| jdt| jdd}|   s|	t| j
 jdt| j
 jdt| j
 jdt| j
 jdt| j
 jdt| j
 jdd |S )Nr   r   )r   rR   r   rP   )ra   r   r   r   r   r   )r   rB   rd   r?   r"   r   r   rC   rP   updater   ra   r   r   Zdmp1Zdmq1Ziqmp)rM   rd   r   r-   r-   r.   r   n  s&    zCryptographyRSAKey.to_dictc              
   C   sF   z| j || j}W n, ty@ } zt|W Y d }~n
d }~0 0 |S rS   )rB   encryptr
   rK   r   )rM   key_datawrapped_keyrP   r-   r-   r.   wrap_key  s
    zCryptographyRSAKey.wrap_keyc              
   C   sH   z| j || j}|W S  tyB } zt|W Y d }~n
d }~0 0 d S rS   )rB   decryptr
   rK   r   )rM   r   Zunwrapped_keyrP   r-   r-   r.   
unwrap_key  s
    zCryptographyRSAKey.unwrap_key)r   )r   r   r   r   r:   r;   r<   r
   r   r   ZOAEPZMGF1SHA1r   r   r   rQ   rF   r   rz   r~   r   rd   r4   r   r   r   r-   r-   r-   r.   r      s"   /)

r   c                   @   s  e Zd ZejejejejfZej	ej
ejejfZejejejejejfZejfZejfZejejejfZejejej	ejejejejejejejejejejejejejejejejejej
ejejejejdejdejdiZdd Zdd ZdddZddd	Z d
d Z!dd Z"dS )CryptographyAESKeyNc                 C   s  |t jvrtd| |t jt jvr4td| || _| j| j| _	|| j
v rpt|dkrptd| n|| jv rt|dkrtd| nt|| jv rt|dkrtd| nN|| jv rt|d	krtd
| n(|| jv r
t|dkr
td| || _d S )Nz%s is not a valid AES algorithmz%s is not a supported algorithm   zKey must be 128 bit for alg    zKey must be 192 bit for alg     zKey must be 256 bit for alg 0   zKey must be 384 bit for alg @   zKey must be 512 bit for alg )r   AESr   Z	SUPPORTEDunionZ
AES_PSEUDOr?   MODESr=   _modeKEY_128rs   KEY_192KEY_256KEY_384KEY_512_key)rM   rN   rO   r-   r-   r.   rQ     s"    
zCryptographyAESKey.__init__c                 C   s   | j dt| jd}|S )Noctr   rR   rV   )r?   r    r   )rM   r   r-   r-   r.   r     s    zCryptographyAESKey.to_dictc              
   C   s  t |}zttjjd }| |}|jdkrjt| j	}|
|||}|d t|d  }|dd  }n\tt| j	|t d}| }	ttjj }
|
|}||
 7 }|	||	  }d }|||fW S  t y } zt|W Y d }~n
d }~0 0 d S )Nrv   GCMr   ir8   )r!   r/   r   r   
block_sizer   ry   r   AESGCMr   r   rs   r   r   	encryptorr   padderr   finalizerK   r   )rM   
plain_textaadivmodeciphercipher_text_and_tagcipher_textZauth_tagr   r   Zpadded_datarP   r-   r-   r.   r     s&    


zCryptographyAESKey.encryptc              
   C   s  t |}zt |}| |}|jdkrz|d u r6tdt| j}|| }z||||}W q tyv   t	dY q0 n\t
t| j|t d}| }	|	|}
|
|	 7 }
ttjj }||
}|| 7 }|W S  ty } zt	|W Y d }~n
d }~0 0 d S )Nr   ztag cannot be NonezInvalid JWE Auth Tagr   )r!   r   ry   rJ   r   r   r   r   r   r   r   r   r   r   	decryptorr   r   r   r   unpadderrK   )rM   r   r   r   tagr   r   r   r   r   Zpadded_plain_textr   rP   r-   r-   r.   r     s.    



zCryptographyAESKey.decryptc                 C   s   t |}t| j|t }|S rS   )r!   r   r   r   )rM   r   r   r-   r-   r.   r     s    zCryptographyAESKey.wrap_keyc              
   C   sN   t |}zt| j|t }W n, tyH } zt|W Y d }~n
d }~0 0 |S rS   )r!   r   r   r   r   r   )rM   r   r   causer-   r-   r.   r   
  s    zCryptographyAESKey.unwrap_key)N)NNN)#r   r   r   r   ZA128GCMZ	A128GCMKWZA128KWZA128CBCr   ZA192GCMZ	A192GCMKWZA192KWZA192CBCr   ZA256GCMZ	A256GCMKWZA256KWZA128CBC_HS256ZA256CBCr   ZA192CBC_HS384r   ZA256CBC_HS512r   ZAES_KW_ALGSr   r   ZCBCr   rQ   r   r   r   r   r   r-   r-   r-   r.   r     sB   

r   c                   @   sZ   e Zd ZdZeje eje	 ej
e iZdd Zdd Zdd Zdd	 Zd
d ZdS )CryptographyHMACKeyzf
    Performs signing and verification operations using HMAC
    and the specified hash function.
    c                    s   |t jvrtd| || _| j|| _t trD| 	 | _
d S t ts`t ts`tdt trt d g d}t fdd|D rtd | _
d S )Nr1   z+Expecting a string- or bytes-formatted key.r5   )s   -----BEGIN PUBLIC KEY-----s   -----BEGIN RSA PUBLIC KEY-----r   s   ssh-rsac                 3   s   | ]}| v V  qd S rS   r-   )rU   Zstring_valuerN   r-   r.   rY   2  rZ   z/CryptographyHMACKey.__init__.<locals>.<genexpr>zdThe specified key is an asymmetric key or x509 certificate and should not be used as an HMAC secret.)r   HMACr   r?   ALG_MAPr=   	_hash_algrD   rE   rF   rB   rG   rI   rH   r   )rM   rN   rO   Zinvalid_stringsr-   r   r.   rQ     s"    



zCryptographyHMACKey.__init__c                 C   sH   | ddks td| d | d}|d}t|}t|}|S )NrR   r   z1Incorrect key type. Expected: 'oct', Received: %srV   r5   )r=   r   rH   rI   r   )rM   rX   rV   r-   r-   r.   rF   :  s    

z CryptographyHMACKey._process_jwkc                 C   s   | j dt| jddS )Nr   r   r   )r?   r    rB   rC   rl   r-   r-   r.   r   E  s    zCryptographyHMACKey.to_dictc                 C   s4   t |}tj| j| jt d}|| | }|S )Nr   )r!   r   r   rB   r   r   r   r   )rM   r|   hr}   r-   r-   r.   rz   L  s
    
zCryptographyHMACKey.signc                 C   s^   t |}t |}tj| j| jt d}|| z|| d}W n tyX   d}Y n0 |S )Nr   TF)	r!   r   r   rB   r   r   r   r~   r   )rM   r|   r   r   Zverifiedr-   r-   r.   r~   S  s    


zCryptographyHMACKey.verifyN)r   r   r   __doc__r   ZHS256r   r:   ZHS384r;   ZHS512r<   r   rQ   rF   r   rz   r~   r-   r-   r-   r.   r     s   "r   )9ri   r   Zcryptography.exceptionsr   r   Zcryptography.hazmat.backendsr   Z,cryptography.hazmat.bindings.openssl.bindingr   Zcryptography.hazmat.primitivesr   r   r   Z)cryptography.hazmat.primitives.asymmetricr	   r
   r   Z/cryptography.hazmat.primitives.asymmetric.utilsr   r   Z&cryptography.hazmat.primitives.ciphersr   r   r   r   Z&cryptography.hazmat.primitives.keywrapr   r   r   Z&cryptography.hazmat.primitives.paddingr   Z,cryptography.hazmat.primitives.serializationr   r   Zcryptography.utilsr   Zcryptography.x509r   	constantsr   
exceptionsr   r   utilsr   r   r    r!   r"   baser$   r%   r/   r0   r   r   r   r-   r-   r-   r.   <module>   s2    + @z