o
    
c_+                  
   @   s  d dl 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 e jr+d dlmZ dejddfd	d
ZdddefddZd"ddZd#ddZdddedejfddZdddddedefddZdddddededdf
ddZG d d dejZG d!d dejZdS )$    N)InvalidSignatureUnsupportedAlgorithm_Reasons)_calculate_digest_and_algorithm_evp_pkey_derive)serialization)ec)Backendsignature_algorithmreturnc                 C   s   t | tjstdtjd S )Nz/Unsupported elliptic curve signature algorithm.)
isinstancer   ECDSAr   r    UNSUPPORTED_PUBLIC_KEY_ALGORITHM)r
    r   T/opt/certbot/lib/python3.10/site-packages/cryptography/hazmat/backends/openssl/ec.py_check_signature_algorithm   s   r   backendr	   c                 C   s   | j |}| || jjk | j |}|| j jkrtd| j js/| j 	|dkr/td| j 
|}| || jjk | j|d}|S )Nz@ECDSA keys with explicit parameters are unsupported at this timer   ascii)_libEC_KEY_get0_groupopenssl_assert_ffiNULLEC_GROUP_get_curve_name	NID_undef
ValueErrorCRYPTOGRAPHY_IS_LIBRESSLEC_GROUP_get_asn1_flag
OBJ_nid2snstringdecode)r   ec_keygroupnid
curve_namesnr   r   r   _ec_key_curve_sn!   s$   r&   c                 C   s   | j || j j dS )z
    Set the named curve flag on the EC_KEY. This causes OpenSSL to
    serialize EC keys along with their curve OID which makes
    deserialization easier.
    N)r   EC_KEY_set_asn1_flagOPENSSL_EC_NAMED_CURVE)r   ec_cdatar   r   r   _mark_asn1_named_ec_curve?   s   r*   c                 C   sV   | j |}| || jjk | j |}| || jjk | j ||r)tdd S )Nz;Cannot load an EC public key where the point is at infinity)r   EC_KEY_get0_public_keyr   r   r   r   EC_POINT_is_at_infinityr   )r   r)   pointr"   r   r   r   _check_key_infinityK   s   r.   r%   c                 C   s0   zt j|  W S  ty   td|tjw )Nz${} is not a supported elliptic curve)r   _CURVE_TYPESKeyErrorr   formatr   UNSUPPORTED_ELLIPTIC_CURVE)r   r%   r   r   r   _sn_to_elliptic_curveV   s   r3   private_key_EllipticCurvePrivateKeydatac                 C   sz   | j |j}| |dk | jd|}| jdd}| j d|t||||j}| |dk | j|d |d  S )Nr   zunsigned char[]zunsigned int[]   )	r   
ECDSA_size_ec_keyr   r   new
ECDSA_signlenbuffer)r   r4   r6   max_sizesigbuf
siglen_ptrresr   r   r   _ecdsa_sig_sign`   s   rB   
public_key_EllipticCurvePublicKey	signaturec                 C   s8   | j d|t||t||j}|dkr|   td S )Nr   r7   )r   ECDSA_verifyr<   r9   _consume_errorsr   )r   rC   rE   r6   rA   r   r   r   _ecdsa_sig_verifyo   s   rH   c                   @   s   e Zd ZdddZedejfddZedefdd	Z	d
ej
dejdefddZdejfddZdejfddZdejdejdejdefddZdedejdefddZdS )r5   r   r	   c                 C   @   || _ || _|| _t||}t||| _t|| t|| d S N_backendr9   	_evp_pkeyr&   r3   _curver*   r.   selfr   ec_key_cdataevp_pkeyr%   r   r   r   __init__~      

z!_EllipticCurvePrivateKey.__init__r   c                 C      | j S rJ   rN   rP   r   r   r   curve      z_EllipticCurvePrivateKey.curvec                 C      | j jS rJ   rX   key_sizerW   r   r   r   r\         z!_EllipticCurvePrivateKey.key_size	algorithmpeer_public_keyc                 C   sD   | j || jstdtj|jj| jjkrtdt| j | j	|S )Nz1This backend does not support the ECDH algorithm.z2peer_public_key and self are not on the same curve)
rL   +elliptic_curve_exchange_algorithm_supportedrX   r   r   UNSUPPORTED_EXCHANGE_ALGORITHMnamer   r   rM   )rP   r^   r_   r   r   r   exchange   s   z!_EllipticCurvePrivateKey.exchangec                 C   s   | j j| j}| j || j jjk | j j|}| j |}| j j	| j}| j || j jjk | j j
||}| j |dk | j |}t| j ||S )Nr7   )rL   r   r   r9   r   r   r   r   _ec_key_new_by_curve_nidr+   EC_KEY_set_public_key_ec_cdata_to_evp_pkeyrD   )rP   r"   	curve_nidpublic_ec_keyr-   rA   rR   r   r   r   rC      s   z#_EllipticCurvePrivateKey.public_keyc                 C   s2   | j j| j}| j |}tj||   dS )N)private_valuepublic_numbers)	rL   r   EC_KEY_get0_private_keyr9   
_bn_to_intr   EllipticCurvePrivateNumbersrC   rj   )rP   bnri   r   r   r   private_numbers   s   
z(_EllipticCurvePrivateKey.private_numbersencodingr1   encryption_algorithmc                 C   s   | j |||| | j| jS rJ   )rL   _private_key_bytesrM   r9   )rP   rp   r1   rq   r   r   r   private_bytes   s   z&_EllipticCurvePrivateKey.private_bytesr6   r
   c                 C   s&   t | t||j\}}t| j| |S rJ   )r   r   r^   rB   rL   )rP   r6   r
   _r   r   r   sign   s   z_EllipticCurvePrivateKey.signNr   r	   )__name__
__module____qualname__rS   propertyr   EllipticCurverX   intr\   ECDHEllipticCurvePublicKeybytesrc   rC   rm   ro   r   EncodingPrivateFormatKeySerializationEncryptionrs   EllipticCurveSignatureAlgorithmru   r   r   r   r   r5   }   s>    



c                   @   s   e Zd ZdddZedejfddZedefdd	Z	dej
fd
dZdejdefddZdejdejdefddZdededejddfddZdS )rD   r   r	   c                 C   rI   rJ   rK   rO   r   r   r   rS      rT   z _EllipticCurvePublicKey.__init__r   c                 C   rU   rJ   rV   rW   r   r   r   rX      rY   z_EllipticCurvePublicKey.curvec                 C   rZ   rJ   r[   rW   r   r   r   r\      r]   z _EllipticCurvePublicKey.key_sizec           
      C   s   | j | j\}}| j j| j}| j || j jjk | j  2}| j j	|}| j j	|}||||||}| j |dk | j 
|}| j 
|}	W d    n1 sVw   Y  tj||	| jdS )Nr7   )xyrX   )rL    _ec_key_determine_group_get_funcr9   r   r+   r   r   r   _tmp_bn_ctx
BN_CTX_getrl   r   EllipticCurvePublicNumbersrN   )
rP   get_funcr"   r-   bn_ctxbn_xbn_yrA   r   r   r   r   r   rj      s   
z&_EllipticCurvePublicKey.public_numbersr1   c           	   	   C   s$  |t jju r| jjj}n|t jju sJ | jjj}| jj| j	}| j
|| jjjk | jj| j	}| j
|| jjjk | j ;}| jj|||| jjjd|}| j
|dk | jjd|}| jj||||||}| j
||k W d    n1 sw   Y  | jj|d d  S )Nr   zchar[])r   PublicFormatCompressedPointrL   r   POINT_CONVERSION_COMPRESSEDUncompressedPointPOINT_CONVERSION_UNCOMPRESSEDr   r9   r   r   r   r+   r   EC_POINT_point2octr:   r=   )	rP   r1   
conversionr"   r-   r   buflenbufrA   r   r   r   _encode_point   s(   
z%_EllipticCurvePublicKey._encode_pointrp   c                 C   sl   |t jju s|t jju s|t jju r+|t jjus"|t jjt jjfvr&td| |S | j	||| | j
d S )NzKX962 encoding must be used with CompressedPoint or UncompressedPoint format)r   r   X962r   r   r   r   r   rL   _public_key_bytesrM   )rP   rp   r1   r   r   r   public_bytes  s"   



z$_EllipticCurvePublicKey.public_bytesrE   r6   r
   Nc                 C   s,   t | t||j\}}t| j| || d S rJ   )r   r   r^   rH   rL   )rP   rE   r6   r
   rt   r   r   r   verify0  s   z_EllipticCurvePublicKey.verifyrv   )rw   rx   ry   rS   rz   r   r{   rX   r|   r\   r   rj   r   r   r   r   r   r   r   r   r   r   r   r   rD      s0    


rv   )r   r	   r   N)typingcryptography.exceptionsr   r   r   *cryptography.hazmat.backends.openssl.utilsr   r   cryptography.hazmat.primitivesr   )cryptography.hazmat.primitives.asymmetricr   TYPE_CHECKING,cryptography.hazmat.backends.openssl.backendr	   r   r   strr&   r*   r.   r{   r3   r   rB   rH   EllipticCurvePrivateKeyr5   r~   rD   r   r   r   r   <module>   sL   






\