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Returns the algorithms that are implemented by the library.
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The interface for an algorithm used to sign and verify tokens.
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Performs necessary validation and conversions on the key and returns
the key value in the proper format for sign() and verify().
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Returns a digital signature for the specified message
using the specified key value.
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Verifies that the specified digital signature is valid
for the specified message and key values.
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Serializes a given RSA key into a JWK
N)r= )�key_objr9 r9 r: �to_jwk� s zAlgorithm.to_jwkc C s t �dS )zb
Deserializes a given RSA key from JWK back into a PublicKey or PrivateKey object
N)r= )�jwkr9 r9 r: �from_jwk� s zAlgorithm.from_jwkN)
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Placeholder for use when no signing or verification
operations are required.
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zNoneAlgorithm.prepare_keyc C s dS )N� r9 )r> rA r? r9 r9 r: rB � s zNoneAlgorithm.signc C s dS )NFr9 )r> rA r? rC r9 r9 r: rD � s zNoneAlgorithm.verifyN)rI rJ rK rL r@ rB rD r9 r9 r9 r: r. � s r. c @ sZ e Zd ZdZejZejZej Z
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Performs signing and verification operations using HMAC
and the specified hash function.
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|| _ d S )N)�hash_alg)r> rP r9 r9 r: �__init__� s zHMACAlgorithm.__init__c s6 t � �� ddddg}t� fdd�|D ��r2td��� S )Ns -----BEGIN PUBLIC KEY-----s -----BEGIN CERTIFICATE-----s -----BEGIN RSA PUBLIC KEY-----s ssh-rsac 3 s | ]}|� kV qd S )Nr9 )�.0Z string_value)r? r9 r: � <genexpr>� s z,HMACAlgorithm.prepare_key.<locals>.<genexpr>zdThe specified key is an asymmetric key or x509 certificate and should not be used as an HMAC secret.)r �anyr )r> r? Zinvalid_stringsr9 )r? r: r@ � s zHMACAlgorithm.prepare_keyc C s t �tt| ���� dd��S )N�oct)�k�kty)�json�dumpsr r �decode)rE r9 r9 r: rF � s zHMACAlgorithm.to_jwkc C sn y.t | t�rt�| �}nt | t�r(| }nt�W n tk
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zHMACAlgorithm.from_jwkc C s t �||| j��� S )N)�hmac�newrP �digest)r> rA r? r9 r9 r: rB � s zHMACAlgorithm.signc C s t �|| �||��S )N)rb Zcompare_digestrB )r> rA r? rC r9 r9 r: rD � s zHMACAlgorithm.verifyN)rI rJ rK rL �hashlib�sha256r0 �sha384r1 �sha512r2 rQ r@ rM rF rH rB rD r9 r9 r9 r: r/ � s r/ c @ sZ e Zd ZdZejZejZejZdd� Zdd� Z e
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Performs signing and verification operations using
RSASSA-PKCS-v1_5 and the specified hash function.
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|�}Y qzX nt d��|S )Ns ssh-rsa)�passwordz Expecting a PEM-formatted key.) r[ r r �bytesr\ r �
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zRSAAlgorithm.prepare_keyc C s� d }t | dd �r�| �� }ddgt|jj��� t|jj��� t|j��� t|j��� t|j ��� t|j
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t � d �t � d ��}|�� S td��d S )NzKey is not valid JSONrW rn zNot an RSA keyrr rq rp Zothz5Unsupported RSA private key: > 2 primes not supportedrs rt ru rv rw c s g | ] }|� k�qS r9 r9 )rR Zprop)ra r9 r: �
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zRSAAlgorithm.from_jwkc C s |� |t�� | �� �S )N)rB r �PKCS1v15rP )r> rA r? r9 r9 r: rB v s zRSAAlgorithm.signc C s6 y |� ||t�� | �� � dS tk
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zRSAAlgorithm.verifyN)rI rJ rK rL r r0 r1 r2 rQ r@ rM rF rH rB rD r9 r9 r9 r: r5 � s $ Jr5 c @ sN e Zd ZdZejZejZejZdd� Zdd� Z dd� Z
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Performs signing and verification operations using
ECDSA and the specified hash function
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|| _ d S )N)rP )r> rP r9 r9 r: rQ � s zECAlgorithm.__init__c C s~ t |t�st |t�r|S t |ttf�rrt|�}y |�d�rDt|�}nt|�}W qz t k
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|d d�}Y qzX nt d��|S )Ns ecdsa-sha2-)ri z Expecting a PEM-formatted key.) r[ r r rj r\ r rk r! r r_ r rl )r> r? r9 r9 r: r@ � s
zECAlgorithm.prepare_keyc C s" |� |t�| �� ��}t||j�S )N)rB r
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�tj|dd�|��� S )NzKey is not valid JSONrW ZECzNot an Elliptic curve key�x�y�crvzP-256� z)Coords should be 32 bytes for curve P-256zP-384�0 z)Coords should be 48 bytes for curve P-384zP-521�B z)Coords should be 66 bytes for curve P-521Z secp256k1z-Coords should be 32 bytes for curve secp256k1zInvalid curve: �big)� byteorder)r� r� r� rr z!D should be {} bytes for curve {})r[ r\ rX r] r^ r_ r r` r �lenr
Z SECP256R1Z SECP384R1Z SECP521R1Z SECP256K1ZEllipticCurvePublicNumbers�int�
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Performs a signature using RSASSA-PSS with MGF1
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Performs signing and verification operations using Ed25519
This class requires ``cryptography>=2.6`` to be installed.
c K s d S )Nr9 )r> �kwargsr9 r9 r: rQ s zEd25519Algorithm.__init__c C s� t |ttf�r|S t |ttf�rzt |t�r4|�d�}|�d�}d|krNt|�S d|krbt|d d�S |dd� dkrzt |�S t
d��d S ) Nzutf-8z-----BEGIN PUBLICz-----BEGIN PRIVATE)ri r � zssh-z)Expecting a PEM-formatted or OpenSSH key.) r[ r r rj r\ �encoderZ r r r! rl )r> r? Zstr_keyr9 r9 r: r@ # s
z Ed25519Algorithm.prepare_keyc C s$ t |�tk rt|d�n|}|�|�S )a
Sign a message ``msg`` using the Ed25519 private key ``key``
:param str|bytes msg: Message to sign
:param Ed25519PrivateKey key: A :class:`.Ed25519PrivateKey` instance
:return bytes signature: The signature, as bytes
zutf-8)�typerj rB )r> rA r? r9 r9 r: rB 6 s zEd25519Algorithm.signc C st yVt |�tk rt|d�n|}t |�tk r2t|d�n|}t|t�rH|�� }|�||� dS tjjk
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Verify a given ``msg`` against a signature ``sig`` using the Ed25519 key ``key``
:param str|bytes sig: Ed25519 signature to check ``msg`` against
:param str|bytes msg: Message to sign
:param Ed25519PrivateKey|Ed25519PublicKey key: A private or public Ed25519 key instance
:return bool verified: True if signature is valid, False if not.
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Zcryptography.exceptionsr� r Z cryptography.hazmat.primitivesr Z)cryptography.hazmat.primitives.asymmetricr
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