o
    bnS                  
   @   sn  d dl 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 d dlmZmZmZmZmZmZ d dlmZmZmZmZ d	ed
e jeef dejde fddZ!d
e jd de"dede"fddZ#d
e jd de"de dede"f
ddZ$dd Z%dd Z&dd Z'dd Z(dd  Z)G d!d" d"eZ*G d#d$ d$eZ+G d%d& d&eZ,G d'd( d(eZ-dS ))    N)utils)InvalidSignatureUnsupportedAlgorithm_Reasons)_calculate_digest_and_algorithm_check_not_prehashed_warn_sign_verify_deprecated)hashesserialization)AsymmetricSignatureContextAsymmetricVerificationContextr   )AsymmetricPaddingMGF1OAEPPKCS1v15PSScalculate_max_pss_salt_length)RSAPrivateKeyRSAPrivateNumbersRSAPublicKeyRSAPublicNumberspsskeyhash_algorithmreturnc                 C   s(   | j }|tju s|tju rt||S |S N)Z_salt_lengthr   Z
MAX_LENGTHr   r   )r   r   r   salt r   g/var/www/secure340b-portal/env/lib/python3.10/site-packages/cryptography/hazmat/backends/openssl/rsa.py_get_rsa_pss_salt_length)   s   
r   )_RSAPrivateKey_RSAPublicKeydatapaddingc                 C   s   t |ts	tdt |tr| jj}n+t |tr4| jj}t |jt	s(t
dtj| |s3t
dtjn
t
d|jtjt| ||||S )Nz1Padding must be an instance of AsymmetricPadding.'Only MGF1 is supported by this backend.zPThis combination of padding and hash algorithm is not supported by this backend.${} is not supported by this backend.)
isinstancer   	TypeErrorr   _libRSA_PKCS1_PADDINGr   ZRSA_PKCS1_OAEP_PADDING_mgfr   r   r   UNSUPPORTED_MGFZrsa_padding_supportedUNSUPPORTED_PADDINGformatname_enc_dec_rsa_pkey_ctx)backendr   r"   r#   padding_enumr   r   r   _enc_dec_rsa6   s,   





r2   r1   c                 C   s  t |tr| jj}| jj}n| jj}| jj}| j|j| j	j
}| || j	j
k | j	|| jj}||}| |dk | j||}| |dk | j|j}	| |	dk t |tr| jjr| |jj}
| j||
}| |dk | |j}| j||}| |dk t |tr|jd urt|jdkr| jt|j}| || j	j
k | j	||jt|j | j||t|j}| |dk | j	d|	}| j	d|	}|||||t|}| j	|d |d  }| j  |dkrtd|S )N   r   size_t *unsigned char[]zEncryption/decryption failed.) r&   r!   r(   ZEVP_PKEY_encrypt_initZEVP_PKEY_encryptZEVP_PKEY_decrypt_initZEVP_PKEY_decryptEVP_PKEY_CTX_new	_evp_pkey_ffiNULLopenssl_assertgcEVP_PKEY_CTX_freeEVP_PKEY_CTX_set_rsa_paddingEVP_PKEY_sizer   ZCryptography_HAS_RSA_OAEP_MD_evp_md_non_null_from_algorithmr*   
_algorithmEVP_PKEY_CTX_set_rsa_mgf1_mdZEVP_PKEY_CTX_set_rsa_oaep_mdZ_labellenZOPENSSL_mallocmemmoveZ EVP_PKEY_CTX_set0_rsa_oaep_labelnewbufferERR_clear_error
ValueError)r0   r   r"   r1   r#   initZcryptpkey_ctxresZbuf_sizemgf1_mdZoaep_mdZlabelptrZoutlenbufresbufr   r   r   r/   Z   sX   


r/   c                 C   s   t |ts	td| j|j}| |dk t |tr"| jj}|S t |t	rPt |j
ts3tdtjt |tjs=td||j d dk rJtd| jj}|S td|jtj)Nz'Expected provider of AsymmetricPadding.r   r$   z*Expected instance of hashes.HashAlgorithm.   zDDigest too large for key size. Use a larger key or different digest.r%   )r&   r   r'   r(   r>   r7   r:   r   r)   r   r*   r   r   r   r+   r	   HashAlgorithmdigest_sizerG   ZRSA_PKCS1_PSS_PADDINGr-   r.   r,   )r0   r   r#   	algorithmZ	pkey_sizer1   r   r   r   _rsa_sig_determine_padding   s2   



rR   c           
      C   s.  t | |||}| j|j| jj}| || jjk | j|| jj}||}| |dk |d urP| 	|}| j
||}|dkrP|   td|jtj| j||}|dkri|   td|jtjt|tr| j|t|||}| |dk | 	|jj}	| j||	}| |dk |S )Nr3   r   z4{} is not supported by this backend for RSA signing.z4{} is not supported for the RSA signature operation.)rR   r(   r6   r7   r8   r9   r:   r;   r<   r?   ZEVP_PKEY_CTX_set_signature_md_consume_errorsr   r-   r.   r   ZUNSUPPORTED_HASHr=   r,   r&   r   Z EVP_PKEY_CTX_set_rsa_pss_saltlenr   r*   r@   rA   )
r0   r#   rQ   r   Z	init_funcr1   rI   rJ   Zevp_mdrK   r   r   r   _rsa_sig_setup   sJ   

rT   c           
      C   s   t | |||| jj}| jd}| j|| jj||t|}| |dk | jd|d }| j||||t|}|dkrG| 	 }	t
d|	| j|d d  S )Nr4   r3   r5   r   zuDigest or salt length too long for key size. Use a larger key or shorter salt length if you are specifying a PSS salt)rT   r(   ZEVP_PKEY_sign_initr8   rD   ZEVP_PKEY_signr9   rB   r:   _consume_errors_with_textrG   rE   )
r0   r#   rQ   private_keyr"   rI   buflenrJ   rL   errorsr   r   r   _rsa_sig_sign   s*   rY   c                 C   sV   t | |||| jj}| j||t||t|}| |dk |dkr)|   td S )Nr   )rT   r(   ZEVP_PKEY_verify_initZEVP_PKEY_verifyrB   r:   rS   r   )r0   r#   rQ   
public_key	signaturer"   rI   rJ   r   r   r   _rsa_sig_verify
  s   r\   c                 C   s   t | |||| jj}| j|j}| |dk | jd|}| jd|}| j||||t	|}	| j
|d |d  }
| j  |	dkrIt|
S )Nr   r5   r4   r3   )rT   r(   ZEVP_PKEY_verify_recover_initr>   r7   r:   r8   rD   ZEVP_PKEY_verify_recoverrB   rE   rF   r   )r0   r#   rQ   rZ   r[   rI   maxlenrL   rW   rJ   rM   r   r   r   _rsa_sig_recover  s&   
r^   c                   @   sD   e Zd ZdededejfddZdeddfd	d
Z	defddZ
dS )_RSASignatureContextrV   r#   rQ   c                 C   s<   || _ || _t|||| || _|| _t| j| j | _d S r   )_backend_private_keyrR   _paddingr@   r	   Hash	_hash_ctx)selfr0   rV   r#   rQ   r   r   r   __init__=  s   z_RSASignatureContext.__init__r"   r   Nc                 C      | j | d S r   rd   updatere   r"   r   r   r   ri   O     z_RSASignatureContext.updatec                 C   s   t | j| j| j| j| j S r   )rY   r`   rb   r@   ra   rd   finalizere   r   r   r   rl   R  s   z_RSASignatureContext.finalize)__name__
__module____qualname__r   r   r	   rO   rf   bytesri   rl   r   r   r   r   r_   <  s    
r_   c                   @   sD   e Zd ZdedededejfddZdedd	fd
dZ	dddZ
d	S )_RSAVerificationContextrZ   r[   r#   rQ   c                 C   sF   || _ || _|| _|| _t|||| |}|| _t| j| j | _d S r   )	r`   _public_key
_signaturerb   rR   r@   r	   rc   rd   )re   r0   rZ   r[   r#   rQ   r   r   r   rf   ]  s   z _RSAVerificationContext.__init__r"   r   Nc                 C   rg   r   rh   rj   r   r   r   ri   r  rk   z_RSAVerificationContext.updatec                 C   s"   t | j| j| j| j| j| j S r   )r\   r`   rb   r@   rs   rt   rd   rl   rm   r   r   r   verifyu  s   z_RSAVerificationContext.verify)r   N)rn   ro   rp   r   rq   r   r	   rO   rf   ri   ru   r   r   r   r   rr   \  s    
rr   c                   @   s   e Zd Zdd ZedZdedej	de
fddZd	ededefd
dZdefddZdefddZdejdejdejdefddZdededejejej	f defddZdS )r    c                 C   s   |s|j |}|dkr| }td||j ||jj}||dk || _|| _	|| _
| jjd}| jj | j	|| jjj| jjj | j|d | jjjk | jj |d | _d S )Nr3   zInvalid private key	BIGNUM **r   )r(   ZRSA_check_keyrU   rG   ZRSA_blinding_onr8   r9   r:   r`   
_rsa_cdatar7   rD   RSA_get0_keyBN_num_bits	_key_size)re   r0   	rsa_cdataevp_pkeyZ_skip_check_keyrJ   rX   nr   r   r   rf     s&   
z_RSAPrivateKey.__init__rz   r#   rQ   r   c                 C   s   t   t| t| j| ||S r   )r   r   r_   r`   )re   r#   rQ   r   r   r   signer  s   z_RSAPrivateKey.signer
ciphertextc                 C   s2   | j d d }|t|krtdt| j| ||S )N      z,Ciphertext length must be equal to key size.)key_sizerB   rG   r2   r`   )re   r   r#   Zkey_size_bytesr   r   r   decrypt  s   z_RSAPrivateKey.decryptc                 C   sV   | j j| j}| j || j jjk | j j|| j jj}| j 	|}t
| j ||S r   )r`   r(   ZRSAPublicKey_duprw   r:   r8   r9   r;   ZRSA_freeZ_rsa_cdata_to_evp_pkeyr!   )re   ctxr|   r   r   r   rZ     s
   z_RSAPrivateKey.public_keyc           	      C   s  | j jd}| j jd}| j jd}| j jd}| j jd}| j jd}| j jd}| j jd}| j j| j||| | j |d | j jjk | j |d | j jjk | j |d | j jjk | j j| j|| | j |d | j jjk | j |d | j jjk | j j	| j||| | j |d | j jjk | j |d | j jjk | j |d | j jjk t
| j |d | j |d | j |d | j |d | j |d | j |d t| j |d | j |d ddS )Nrv   r   er}   )pqddmp1dmq1iqmppublic_numbers)r`   r8   rD   r(   rx   rw   r:   r9   ZRSA_get0_factorsZRSA_get0_crt_paramsr   
_bn_to_intr   )	re   r}   r   r   r   r   r   r   r   r   r   r   private_numbers  sB   
z_RSAPrivateKey.private_numbersencodingr-   encryption_algorithmc                 C   s   | j |||| | j| jS r   )r`   Z_private_key_bytesr7   rw   )re   r   r-   r   r   r   r   private_bytes  s   z_RSAPrivateKey.private_bytesr"   c                 C   s$   t | j||\}}t| j||| |S r   )r   r`   rY   )re   r"   r#   rQ   r   r   r   sign  s   z_RSAPrivateKey.signN)rn   ro   rp   rf   r   read_only_propertyr   r   r	   rO   r   r~   rq   r   r   rZ   r   r   r
   EncodingZPrivateFormatZKeySerializationEncryptionr   typingUnion
asym_utils	Prehashedr   r   r   r   r   r      s>    

#
r    c                
   @   s   e Zd Zdd ZedZdedede	j
defdd	Zd
ededefddZdefddZdejdejdefddZdedededejeje	j
f ddf
ddZdededeje	j
 defddZdS )r!   c                 C   st   || _ || _|| _| j jd}| j j| j|| j jj| j jj | j |d | j jjk | j j	|d | _
d S )Nrv   r   )r`   rw   r7   r8   rD   r(   rx   r9   r:   ry   rz   )re   r0   r{   r|   r}   r   r   r   rf     s   z_RSAPublicKey.__init__rz   r[   r#   rQ   r   c                 C   s,   t   td| t| t| j| |||S )Nr[   )r   r   _check_bytesr   rr   r`   re   r[   r#   rQ   r   r   r   verifier  s   z_RSAPublicKey.verifier	plaintextc                 C   s   t | j| ||S r   )r2   r`   )re   r   r#   r   r   r   encrypt  rk   z_RSAPublicKey.encryptc                 C   s   | j jd}| j jd}| j j| j||| j jj | j |d | j jjk | j |d | j jjk t| j 	|d | j 	|d dS )Nrv   r   r   )
r`   r8   rD   r(   rx   rw   r9   r:   r   r   )re   r}   r   r   r   r   r     s   z_RSAPublicKey.public_numbersr   r-   c                 C   s   | j ||| | j| jS r   )r`   Z_public_key_bytesr7   rw   )re   r   r-   r   r   r   public_bytes%  s   z_RSAPublicKey.public_bytesr"   Nc                 C   s&   t | j||\}}t| j||| ||S r   )r   r`   r\   )re   r[   r"   r#   rQ   r   r   r   ru   .  s   z_RSAPublicKey.verifyc                 C   s   t | t| j||| |S r   )r   r^   r`   r   r   r   r   recover_data_from_signature<  s   z)_RSAPublicKey.recover_data_from_signature)rn   ro   rp   rf   r   r   r   rq   r   r	   rO   r   r   r   r   r   r
   r   ZPublicFormatr   r   r   r   r   ru   Optionalr   r   r   r   r   r!     sR    


	

r!   ).r   Zcryptographyr   Zcryptography.exceptionsr   r   r   Z*cryptography.hazmat.backends.openssl.utilsr   r   r   Zcryptography.hazmat.primitivesr	   r
   Z)cryptography.hazmat.primitives.asymmetricr   r   r   Z1cryptography.hazmat.primitives.asymmetric.paddingr   r   r   r   r   r   Z-cryptography.hazmat.primitives.asymmetric.rsar   r   r   r   r   rO   intr   rq   r2   r/   rR   rT   rY   r\   r^   r_   rr   r    r!   r   r   r   r   <module>   s\    

$
A+* $u