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_ecdsa.cpython-39.pyc
a ���g"Y � @ s� d dl mZmZmZmZ d dlZd dlZd dlZddlm Z ddl m Z m Z m Z mZmZmZmZmZmZmZ ddlmZ ddlmZmZ ddlmZ dd l m Z ej d k r�e Z e!Z"nd d � Z e � Z#e#d kr�e$d��g d�Z%dddd�Z&d d dd�Z'dd� Z(dd� Z)dd� Z*dd � Z+d d � Z,d d � Z-G d!d"� d"�Z.G d#d$� d$�Z/e/ddd�Z0e.d%d&d'�Z1e/e1d(d)d*�Z2e.d+d&d,�Z3e/e3d-d.d/�Z4e.d0d&d1�Z5e/e5d2d3d4�Z6e.d5d&d6�Z7e/e7d7d8d9�Z8e.d:d&d;�Z9e/e9d<d=d>�Z:dS )?� )�unicode_literals�division�absolute_import�print_functionN� )�backend) � Certificate� DSASignature�ECDomainParameters�ECPointBitString� ECPrivateKey�int_from_bytes�PrivateKeyAlgorithm�PrivateKeyInfo�PublicKeyAlgorithm� PublicKeyInfo)�pretty_message)� type_name�byte_cls)� rand_bytes)�SignatureError)� c C s t | g�S )N)�bytes)�num� r �@/opt/nydus/tmp/pip-target-mke_irhy/lib/python/oscrypto/_ecdsa.py�chr_cls s r Z winlegacyz2Pure-python ECDSA code is only for Windows XP/2003)�ec_generate_pair�ec_compute_public_key_point�ec_public_key_info� ecdsa_sign� ecdsa_verify� �0 �B �Z secp256r1Z secp384r1Z secp521r1� c C s� | t g d��vr"ttdt| ����t| }tttd�| }t|�}t |dd�}|dkr:||j k r:qdq:t dt dt d| d�d ��td |d ��d ��}t|�}|�� |d jd< t|| �|fS )a� Generates a EC public/private key pair :param curve: A unicode string. Valid values include "secp256r1", "secp384r1" and "secp521r1". :raises: ValueError - when any of the parameters contain an invalid value TypeError - when any of the parameters are of the wrong type :return: A 2-element tuple of (asn1crypto.keys.PublicKeyInfo, asn1crypto.keys.PrivateKeyInfo) r% �\ curve must be one of "secp256r1", "secp384r1", "secp521r1", not %s F��signedr �ec�named��name�value�� algorithm� parametersZ ecPrivkeyVer1)�version� private_key)r2 Zprivate_key_algorithmr3 r3 � public_key)�set� ValueErrorr �repr� CURVE_BYTES�SECP256R1_BASE_POINT�SECP384R1_BASE_POINT�SECP521R1_BASE_POINTr r �orderr r r r r �copy�parsedr )�curve�curve_num_bytes�curve_base_point�private_key_bytes�private_key_intZprivate_key_infoZec_pointr r r r C sB ��� ����r c C s� t | t�s ttdt| ����| j\}}|dkr:ttd���|dkrPttd���n:|dkr�|tg d��vrzttdt|����t t t d�| }|| d j d j }t�|j|j�S ) a Constructs the PublicKeyInfo for a PrivateKeyInfo :param private_key: An asn1crypto.keys.PrivateKeyInfo object :raises: ValueError - when any of the parameters contain an invalid value :return: An asn1crypto.keys.ECPointBitString object zy private_key must be an instance of the asn1crypto.keys.PrivateKeyInfo class, not %s Z implicit_cazj Unable to compute public key for EC key using Implicit CA parameters Z specifiedzX Unable to compute public key for EC key over a specified field r+ r% zj Named curve must be one of "secp256r1", "secp384r1", "secp521r1", not %s r3 )� isinstancer � TypeErrorr r r? r6 r5 r7 r9 r: r; r> �nativer Z from_coords�x�y)r3 Z curve_type�detailsZ base_pointZ public_pointr r r r s8 � �����r c C sB |t g d��vr"ttdt|����ttdtd|d�d��| d��S )a� Constructs the PublicKeyInfo for an ECPointBitString :param private_key: An asn1crypto.keys.ECPointBitString object :param curve: A unicode string of the curve name - one of secp256r1, secp384r1 or secp521r1 :raises: ValueError - when any of the parameters contain an invalid value :return: An asn1crypto.keys.PublicKeyInfo object r% r' r* r+ r, r/ )r0 r4 )r5 r6 r r7 r r r )�public_key_pointr? r r r r � s ����r c C s* t | d�rt| jt�s(ttdt| ����| j}|tg d��vrJt td���t|t �sfttdt|����|tg d��vr�t tdt |����t t |�}| jd j}|d j}|d j}t| }tttd�| } | j} ||��� } t| �} t| d d �| } d | }d | }t�||d | | |��� }t�|||��� }t�||d | | |��� }t�|||��� }d }d }d}t|�|k �r�t�|||��� }||7 }�qpt|d |� d d �}|d k�sl|| k�rȐql| | j| }|d k�r�qlt || �| || | | }|d k�r�ql�q�qlt ||d��� � S )aN Generates an ECDSA signature in pure Python (thus slow) :param private_key: The PrivateKey to generate the signature with :param data: A byte string of the data the signature is for :param hash_algorithm: A unicode string of "sha1", "sha256", "sha384" or "sha512" :raises: ValueError - when any of the parameters contain an invalid value TypeError - when any of the parameters are of the wrong type OSError - when an error is returned by the OS crypto library :return: A byte string of the signature �asn1zy private_key must be an instance of the oscrypto.asymmetric.PrivateKey class, not %s r% zx private_key does not use one of the named curves secp256r1, secp384r1 or secp521r1 �< data must be a byte string, not %s ��sha1�sha224�sha256�sha384�sha512�z hash_algorithm must be one of "sha1", "sha224", "sha256", "sha384", "sha512", not %s r3 Fr( � � r � )�r�s) �hasattrrD rK r rE r r r? r5 r6 r r7 �getattr�hashlibr> �contentsrF r8 r9 r: r; r< �digest�lenr �hmac�newrG � inverse_modr �dump)r3 �data�hash_algorithm� curve_name� hash_funcZec_private_keyrB rC r@ rA �nr] Z hash_length�h�V�KrW rX �T�kr r r r � st �� �� �� r c C s� t | d�}|r t| jttf�s0ttdt| ����| j}|t g d��vrRt td���t|t �snttdt|����t|t �s�ttdt|����|t g d��vr�t tdt |����| j}t|t�r�|j }tttd�| }|d �� \}} |j} t|j|| | �} z"t�|�}|d j} |d j} W n t �y6 td ��Y n0 d }|| dk O }|| | kO }|| dk O }|| | kO }|�rztd ��tt|�}||��� }t|dd�| }t | | �}|| | }| | | }|| | | }| |j | k�r�td ��dS )a� Verifies an ECDSA signature in pure Python (thus slow) :param certificate_or_public_key: A Certificate or PublicKey instance to verify the signature with :param signature: A byte string of the signature to verify :param data: A byte string of the data the signature is for :param hash_algorithm: A unicode string of "md5", "sha1", "sha256", "sha384" or "sha512" :raises: oscrypto.errors.SignatureError - when the signature is determined to be invalid ValueError - when any of the parameters contain an invalid value TypeError - when any of the parameters are of the wrong type OSError - when an error is returned by the OS crypto library rK z� certificate_or_public_key must be an instance of the oscrypto.asymmetric.PublicKey or oscrypto.asymmetric.Certificate classes, not %s r% z� certificate_or_public_key does not use one of the named curves secp256r1, secp384r1 or secp521r1 zA signature must be a byte string, not %s rL rM rS r4 rW rX zSignature is invalidr r Fr( N) rY rD rK r r rE r r r? r5 r6 r r7 r4 r9 r: r; Z to_coordsr< � PrimePointr �loadrF r rZ r[ r] r ra rG )Zcertificate_or_public_key� signaturerc rd Zhas_asn1re rK rA rG rH rg rJ rW rX �invalidrf r] �z�w�u1�u2Z hash_pointr r r r! ` sx � � � �� �� r! c C s� | dk s|| kr| | } | | }}d\}}}}|dkrrt ||�|f \}}}||| ||| ||f\}}}}q.|dks~J �|dkr�|S || S dS )z� Compute the modular inverse of a (mod p) :param a: An integer :param p: An integer :return: An integer r )r r r r r N)�divmod) �a�p�c�dZuc�vcZudZvd�qr r r ra s & ra c @ s e Zd ZdZdd� Zdd� ZdS )� PrimeCurvezc Elliptic curve over a prime field. Characteristic two field curves are not supported. c C s || _ || _|| _dS )a The curve of points satisfying y^2 = x^3 + a*x + b (mod p) :param p: The prime number as an integer :param a: The component a as an integer :param b: The component b as an integer N)rw rv �b)�selfrw rv r} r r r �__init__- s zPrimeCurve.__init__c C sB |j |j }|j|j |j }||| j|j | j | j dkS )z~ :param point: A Point object :return: Boolean if the point is on this curve r )rH rG rv r} rw )r~ Zpoint�y2�x3r r r �contains? s zPrimeCurve.containsN)�__name__� __module__� __qualname__�__doc__r r� r r r r r| ' s r| c @ sB e Zd ZdZddd�Zdd� Zdd� Zd d � Zd d � Zd d� Z dS )rm z1 A point on a prime-field elliptic curve Nc C sR || _ || _|| _|| _| j r2| j �| �s2td��| jrN| | j tkrNtd��dS )a) :param curve: A PrimeCurve object :param x: The x coordinate of the point as an integer :param y: The y coordinate of the point as an integer :param order: The order of the point, as an integer - optional zInvalid EC pointN)r? rG rH r< r� r6 �INFINITY)r~ r? rG rH r< r r r r R s zPrimePoint.__init__c C s0 | j |j kr(| j|jkr(| j|jkr(dS dS dS )zy :param other: A PrimePoint object :return: 0 if identical, 1 otherwise r r N)r? rG rH �r~ �otherr r r �__cmp__o s $zPrimePoint.__cmp__c C s� |t kr | S | t kr|S | j|jks(J �| j|jkrX| j|j | jj dkrPt S | �� S | jj}|j| j t|j| j |� | }|| | j |j | }|| j| | j | }t| j||�S )zq :param other: A PrimePoint object :return: A PrimePoint object r )r� r? rG rH rw �doublera rm )r~ r� rw �l_r� �y3r r r �__add__| s "zPrimePoint.__add__c C s� dd� }|}| j r || j }|dkr(tS | tkr4tS |dks@J �d| }t| j| j| j | j �}||�d }| }|dkr�|�� }||@ dkr�||@ dkr�|| }||@ dkr�||@ dkr�|| }|d }qp|S )�� :param other: An integer to multiple the Point by :return: A PrimePoint object c S s* | dks J �d}|| kr"d| }q|d S )Nr r � r )rG �resultr r r � leftmost_bit� s z(PrimePoint.__mul__.<locals>.leftmost_bitr r r� r )r< r� rm r? rG rH r� )r~ r� r� �eZe3Z negative_self�ir� r r r �__mul__� s* zPrimePoint.__mul__c C s | | S )r� r r� r r r �__rmul__� s zPrimePoint.__rmul__c C st | j j}| j j}d| j | j | td| j |� | }|| d| j | }|| j| | j | }t| j ||�S )zS :return: A PrimePoint object that is twice this point r r� )r? rw rv rG ra rH rm )r~ rw rv r� r� r� r r r r� � s (zPrimePoint.double)N) r� r� r� r� r r� r� r� r� r� r r r r rm M s + rm l ����������������l �9��{�u��D�j�Sg9�g(Bl ��+�' 1t�:�_|v!a�:@m�l H�<�^� W]�dZ{cx��W\Iq l 1(�i�&^#a�;�������l ���������?l ��F eY8� �w�-X"PVd�/�%�PP!-l ! �"X�!#BX�t�J9!'�|�%�V�A�-l 4~ f�&Dv�@h�!�f�E0m 9_ qlM/l =*�8%� � �(��������?l ������? @�� l K`�O�pq^cv 3,�e< 1�U�]>{|R�*��Zl �B11e %:f=K`�wr�H�7g�HK8�hkl �Q~o��]�l+f�Ug+< �)Z?�8�O�?q!�Ol Q%�x +� Oh�bi+}s����� @�� l �� ���~�����������������l �*�'�#.T��Ebc +�Z'@=D 1 "(�?7N 2Z�_+��|��S/1fl � �d�x�R��joyU8T( :�ss�"� n�Z�L�8 k�&�"_�Ul _�!�uR��/�sX0 @qa�N�Q�N�B&J��xS8KJ�E�Y� � K%�l l s)��e`g�w�l X_[n�lv|�������������l# �����������������������������������l# ?�VQ(z O�%b�95~c�te1oR {� V��;�LH w>�l�-rZE]�"Sr�&Ga9}*Fl# f=��x�K�)H-apY$3^Q� n�%k�{;/K!u{4-{�?$�O� �d8�V 1�l�3s:� l# Pf�?�Q�E$XN�!8 5aZ��U ��WL9�YL� �h�z �f�$Du13otc!�%� p MxjRr`l# dp"z\}[�z�3"n�Z;PK�# `�7�r�o�C�Q������������������);� __future__r r r r r[ r_ �sys� r Z_asn1r r r r r r r r r r �_errorsr �_typesr r �utilr �errorsr � version_info�chrr �xrange�rangeZ_backend� SystemError�__all__r8 ZCURVE_EXTRA_BITSr r r r r! ra r| rm r� ZSECP192R1_CURVEZSECP192R1_BASE_POINTZSECP224R1_CURVEZSECP224R1_BASE_POINTZSECP256R1_CURVEr9 ZSECP384R1_CURVEr: ZSECP521R1_CURVEr; r r r r �<module> s� 0 ��<;% %#& �� �� �� �� ��