o
    6dX                     @   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-   yC:\Users\jesus\OneDrive\Desktop\erpjis_fastapi\backend\jisbackend\Lib\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s-t|dr2|| _d S t|dr>| d}t|trK| || _d S t|trU|d}t|trzz	t||  }W n tyv   t|d |  d}Y nw W n ty } zt|d }~ww || _d S td| )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   sF   





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 rZt  d}t	||}|
|  S ||  S )Nktyr9   z0Incorrect key type. Expected: 'EC', Received: %sc                 3       | ]}| 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   rY   r\   r]   curvepublicrb   privater-   rX   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   rn   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)rn   lenri   rJ   
from_bytesr   )rM   Zraw_signaturerq   Zr_bytesZs_bytesro   rp   r-   r-   r.   _raw_to_der   s   
zCryptographyECKey._raw_to_derc                 C   sV   | j jd | jjjkrt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   rf   rl   	TypeErrornamesignr	   ECDSArr   )rM   msg	signaturer-   r-   r.   r{      s   
zCryptographyECKey.signc                 C   s@   z|  |}| j||t|   W dS  ty   Y dS w )NTF)rv   rB   verifyr	   r|   r>   rK   )rM   r}   sigr~   r-   r-   r.   r      s   
zCryptographyECKey.verifyc                 C      t | jdS Nr2   rA   rB   rm   r-   r-   r.   	is_public      zCryptographyECKey.is_publicc                 C       |   r| S | | j | jS rT   r   	__class__rB   re   r?   rm   r-   r-   r.   re         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
}|   sS| j j}t||d
d	|d< |S )Nr_   r`   ra   )Z	secp256r1Z	secp384r1Z	secp521r1   rw   r9   )sizeASCII)algrR   r^   r\   r]   rb   )r   rB   re   rf   rz   rl   r?   r"   public_numbersr\   rC   r]   private_numbersprivate_value)rM   re   r^   rl   datar   r-   r-   r.   to_dict   s(   	zCryptographyECKey.to_dictN)__name__
__module____qualname__r   r:   r;   r<   r   rQ   rF   rn   rr   rv   r{   r   r   re   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   sL  |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rDt|drD|| _d S t|trQ| || _d S t|tr[|d}t|trz/|drn| | W d S zt||  | _W W d S  ty   t|d |  d| _Y W d S w  ty } zt|d }~ww td| )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      sR   






zCryptographyRSAKey.__init__c              	      sB    ddkstd  d t  dd}t  d}t||}d vr0||  S t  d}g d}t fd	d
|D rtt fdd
|D sUtdt d }t d }t d }	t d }
t d }nt	|||\}}t
||}	t||}
t||}t||||	|
||}||  S )NrR   r   z1Incorrect key type. Expected: 'RSA', Received: %srP      nrb   )pqdpdqqic                 3   rS   rT   r-   rU   rX   r-   r.   rZ   "  r[   z2CryptographyRSAKey._process_jwk.<locals>.<genexpr>c                 3   rS   rT   r-   rU   rX   r-   r.   rZ   $  r[   z2Precomputed private key parameters are incomplete.r   r   r   r   r   )r=   r   r   r   ZRSAPublicNumbersre   r@   anyrc   Zrsa_recover_prime_factorsZrsa_crt_dmp1Zrsa_crt_dmq1Zrsa_crt_iqmpZRSAPrivateNumbersrd   )rM   rY   rP   r   rg   rb   Zextra_paramsr   r   r   r   r   rh   r-   rX   r.   rF     s.   zCryptographyRSAKey._process_jwkc                 C   s   t ||  }| | _d S rT   )r   r@   re   rB   )rM   rN   r-   r-   r.   r   ;  s   z CryptographyRSAKey._process_certc              
   C   s@   z| j |t |  }W |S  ty } zt|d }~ww rT   )rB   r{   r
   PKCS1v15r>   rK   r   )rM   r}   r~   rP   r-   r-   r.   r{   ?  s   zCryptographyRSAKey.signc                 C   sL   |   s	td z|  j||t |   W dS  t	y%   Y dS w )NzKAttempting to verify a message with a private key. This is not recommended.TF)
r   warningswarnre   rB   r   r
   r   r>   r   )rM   r}   r   r-   r-   r.   r   F  s   
zCryptographyRSAKey.verifyc                 C   r   r   r   rm   r-   r-   r.   r   P  r   zCryptographyRSAKey.is_publicc                 C   r   rT   r   rm   r-   r-   r.   re   S  r   zCryptographyRSAKey.public_keyPKCS8c                 C   s   |   r(|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r1tj
j}n|dkr:t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}|   sk|	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   )rb   r   r   r   r   r   )r   rB   re   r?   r"   r   r   rC   rP   updater   rb   r   r   Zdmp1Zdmq1Ziqmp)rM   re   r   r-   r-   r.   r   n  s&   zCryptographyRSAKey.to_dictc              
   C   s8   z| j || j}W |S  ty } zt|d }~ww rT   )rB   encryptr
   rK   r   )rM   key_datawrapped_keyrP   r-   r-   r.   wrap_key  s   zCryptographyRSAKey.wrap_keyc              
   C   s8   z| j || j}|W S  ty } zt|d }~ww rT   )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   r{   r   r   re   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rtd| || _| j| j| _	|| j
v r7t|dkr7td| || jv rIt|dkrItd| || jv r[t|dkr[td| || jv rmt|d	krmtd
| || 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_128rt   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   rW   )r?   r    r   )rM   r   r-   r-   r.   r     s   zCryptographyAESKey.to_dictc              
   C   s   t |}zdttjjd }| |}|jdkr5t| j	}|
|||}|d t|d  }|dd  }n.tt| j	|t d}| }	ttjj }
|
|}||
 7 }|	||	  }d }|||fW S  tyx } zt|d }~ww )Nrw   GCMr   ir8   )r!   r/   r   r   
block_sizer   rz   r   AESGCMr   r   rt   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 |}zht |}| |}|jdkr<|d u rtdt| j}|| }z||||}W |W S  ty;   t	dw t
t| j|t d}| }	|	|}
|
|	 7 }
ttjj }||
}|| 7 }|W S  ty| } zt	|d }~ww )Nr   ztag cannot be NonezInvalid JWE Auth Tagr   )r!   r   rz   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     s6   



zCryptographyAESKey.decryptc                 C   s   t |}t| j|t }|S rT   )r!   r   r   r   )rM   r   r   r-   r-   r.   r     s   zCryptographyAESKey.wrap_keyc              
   C   s@   t |}zt| j|t }W |S  ty } zt|d }~ww rT   )r!   r   r   r   r   r   )rM   r   r   causer-   r-   r.   r   
  s   zCryptographyAESKey.unwrap_keyrT   )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     sD    

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r"| 	 | _
d S t ts0t ts0tdt tr: d g d}t fdd|D rMt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   rS   rT   r-   )rV   Zstring_valuerN   r-   r.   rZ   2  r[   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: %srW   r5   )r=   r   rH   rI   r   )rM   rY   rW   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   rm   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.   r{   L  s
   
zCryptographyHMACKey.signc                 C   s^   t |}t |}tj| j| jt d}|| z
|| d}W |S  ty.   d}Y |S w )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   r{   r   r-   r-   r-   r.   r     s    "r   )9rj   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>   s4     + @z