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Editing: ec.cpython-39.pyc
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N)r ZEC_KEY_set_asn1_flagZOPENSSL_EC_NAMED_CURVE)r Zec_cdatar r r �_mark_asn1_named_ec_curve@ s �r$ c C s8 zt j| � W S ty2 td�|�tj��Y n0 d S )Nz${} is not a supported elliptic curve)r Z _CURVE_TYPES�KeyErrorr �formatr ZUNSUPPORTED_ELLIPTIC_CURVE)r r" r r r �_sn_to_elliptic_curveL s �r' c C sz | j �|j�}| �|dk� | j�d|�}| j�dd�}| j �d|t|�|||j�}| �|dk� | j�|�d |d � S )Nr zunsigned char[]zunsigned int[]� ) r Z ECDSA_size�_ec_keyr r �newZ ECDSA_sign�len�buffer)r � private_key�dataZmax_sizeZsigbufZ siglen_ptr�resr r r �_ecdsa_sig_signV s �r0 c C s8 | j �d|t|�|t|�|j�}|dkr4| �� t�d S )Nr r( )r Z ECDSA_verifyr+ r) Z_consume_errorsr )r � public_key� signaturer. r/ r r r �_ecdsa_sig_verifyc s �r3 c @ s$ e Zd Zdd� Zdd� Zdd� ZdS )�_ECDSASignatureContextc C s || _ || _t�||�| _d S �N)�_backend� _private_keyr �Hash�_digest)�selfr r- � algorithmr r r �__init__n s z _ECDSASignatureContext.__init__c C s | j �|� d S r5 �r9 �update�r: r. r r r r> s s z _ECDSASignatureContext.updatec C s | j �� }t| j| j|�S r5 )r9 �finalizer0 r6 r7 �r: Zdigestr r r r@ v s z _ECDSASignatureContext.finalizeN)�__name__� __module__� __qualname__r< r> r@ r r r r r4 l s r4 c @ s$ e Zd Zdd� Zdd� Zdd� ZdS )�_ECDSAVerificationContextc C s$ || _ || _|| _t�||�| _d S r5 )r6 � _public_key� _signaturer r8 r9 )r: r r1 r2 r; r r r r< ~ s z"_ECDSAVerificationContext.__init__c C s | j �|� d S r5 r= r? r r r r> � s z _ECDSAVerificationContext.updatec C s" | j �� }t| j| j| j|� d S r5 )r9 r@ r3 r6 rF rG rA r r r �verify� s �z _ECDSAVerificationContext.verifyN)rB rC rD r< r> rH r r r r rE | s rE c @ sZ e Zd Zdd� Ze�d�Zedd� �Zdd� Z dd � Z d d � Z d d � Z dd� Z dd� ZdS )�_EllipticCurvePrivateKeyc C s6 || _ || _|| _t||�}t||�| _t||� d S r5 �r6 r) � _evp_pkeyr# r' �_curver$ �r: r Z ec_key_cdata�evp_pkeyr" r r r r< � s z!_EllipticCurvePrivateKey.__init__rL c C s | j jS r5 ��curve�key_size�r: r r r rQ � s z!_EllipticCurvePrivateKey.key_sizec C s( t � t|� t|j� t| j| |j�S r5 )r r r r; r4 r6 )r: r r r r �signer� s �z _EllipticCurvePrivateKey.signerc C s� | j �|| j�s tdtj��|jj| jjkr4td��| j j� | j �}| j j� |�d d }| j � |dk� | j j �d|�}| j j�|j �}| j j�|||| j | j j j�}| j � |dk� | j j �|�d |� S )Nz1This backend does not support the ECDH algorithm.z2peer_public_key and self are not on the same curve� � r z uint8_t[])r6 Z+elliptic_curve_exchange_algorithm_supportedrP r r Z UNSUPPORTED_EXCHANGE_ALGORITHM�name� ValueErrorr r r) ZEC_GROUP_get_degreer r r* �EC_KEY_get0_public_keyZECDH_compute_keyr r, )r: r; Zpeer_public_keyr! Zz_lenZz_bufZpeer_key�rr r r �exchange� s0 ������z!_EllipticCurvePrivateKey.exchangec C s� | j j�| j�}| j �|| j jjk� | j j�|�}| j �|�}| j j� | j�}| j �|| j jjk� | j j� ||�}| j �|dk� | j � |�}t | j ||�S )Nr( ) r6 r r r) r r r r Z_ec_key_new_by_curve_nidrX ZEC_KEY_set_public_keyZ_ec_cdata_to_evp_pkey�_EllipticCurvePublicKey)r: r! Z curve_nidZ public_ec_key�pointr/ rN r r r r1 � s z#_EllipticCurvePrivateKey.public_keyc C s2 | j j�| j�}| j �|�}tj|| �� �� d�S )N)� private_value�public_numbers) r6 r ZEC_KEY_get0_private_keyr) � _bn_to_intr ZEllipticCurvePrivateNumbersr1 r^ )r: Zbnr] r r r �private_numbers� s �z(_EllipticCurvePrivateKey.private_numbersc C s | j �|||| | j| j�S r5 )r6 Z_private_key_bytesrK r) )r: �encodingr& Zencryption_algorithmr r r � private_bytes� s �z&_EllipticCurvePrivateKey.private_bytesc C s* t |� t| j||j�\}}t| j| |�S r5 )r r r6 � _algorithmr0 )r: r. r r; r r r �sign� s �z _EllipticCurvePrivateKey.signN)rB rC rD r< r �read_only_propertyrP �propertyrQ rS rZ r1 r` rb rd r r r r rI � s rI c @ sR e Zd Zdd� Ze�d�Zedd� �Zdd� Z dd � Z d d � Z d d � Z dd� Z dS )r[ c C s6 || _ || _|| _t||�}t||�| _t||� d S r5 rJ rM r r r r< � s z _EllipticCurvePublicKey.__init__rL c C s | j jS r5 rO rR r r r rQ � s z _EllipticCurvePublicKey.key_sizec C s6 t � t�d|� t|� t|j� t| j| ||j�S )Nr2 )r r � _check_bytesr r r; rE r6 )r: r2 r r r r �verifier s �z _EllipticCurvePublicKey.verifierc C s� | j �| j�\}}| j j�| j�}| j �|| j jjk� | j �� �d}| j j� |�}| j j� |�}||||||�}| j �|dk� | j � |�}| j � |�} W d � n1 s�0 Y t j || | j d�S )Nr( )�x�yrP )r6 Z _ec_key_determine_group_get_funcr) r rX r r r � _tmp_bn_ctxZ BN_CTX_getr_ r ZEllipticCurvePublicNumbersrL ) r: Zget_funcr! r\ �bn_ctxZbn_xZbn_yr/ ri rj r r r r^ s � *z&_EllipticCurvePublicKey.public_numbersc C s& |t jju r| jjj}n|t jju s(J �| jjj}| jj�| j �}| j� || jj j k� | jj� | j �}| j� || jj j k� | j�� �v}| jj�|||| jj j d|�}| j� |dk� | jj �d|�}| jj�||||||�}| j� ||k� W d � n1 �s0 Y | jj �|�d d � S )Nr zchar[])r � PublicFormat�CompressedPointr6 r ZPOINT_CONVERSION_COMPRESSED�UncompressedPointZ POINT_CONVERSION_UNCOMPRESSEDr r) r r r rX rk ZEC_POINT_point2octr* r, ) r: r& � conversionr! r\ rl ZbuflenZbufr/ r r r � _encode_point s& � �0z%_EllipticCurvePublicKey._encode_pointc C sp |t jju s$|t jju s$|t jju rV|t jjusD|t jjt jjfvrLtd��| �|�S | j� ||| | j d �S d S )NzKX962 encoding must be used with CompressedPoint or UncompressedPoint format) r ZEncodingZX962rm rn ro rW rq r6 Z_public_key_bytesrK )r: ra r& r r r � public_bytes6 s" � � ��� �z$_EllipticCurvePublicKey.public_bytesc C s0 t |� t| j||j�\}}t| j| ||� d S r5 )r r r6 rc r3 )r: r2 r. r r; r r r rH L s �z _EllipticCurvePublicKey.verifyN)rB rC rD r< r re rP rf rQ rh r^ rq rr rH r r r r r[ � s r[ N)#Z __future__r r r Z cryptographyr Zcryptography.exceptionsr r r Z*cryptography.hazmat.backends.openssl.utilsr r r Z cryptography.hazmat.primitivesr r Z)cryptography.hazmat.primitives.asymmetricr r r r r# r$ r' r0 r3 Zregister_interface�objectr4 rE Z(EllipticCurvePrivateKeyWithSerializationrI Z'EllipticCurvePublicKeyWithSerializationr[ r r r r �<module> s& a
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