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o ;j � @ sX d dl mZ d dlmZmZmZmZ dd� Zdd� Zdd� Z d d � Z d d � Z d d� Z dS )� )� long_to_bytes)�EccKey� construct� _import_curve25519_public_key�_import_curve448_public_keyc C st |j | j }|�� rtd��| jdkr t|jjddd��}|S | jdkr0t|jjddd��}|S t|j|� � �}|S )NzInvalid ECDH point� Curve25519� �little)� byteorder�Curve448�8 ) ZpointQ�dZis_point_at_infinity� ValueError�curve� bytearray�x�to_bytesr Z size_in_bytes)Zkey_privZkey_pubZpointP�z� r �J/opt/saltstack/salt/lib/python3.10/site-packages/Cryptodome/Protocol/DH.py� _compute_ecdh s ��r c C � t | �}td|d�S )a� Create a new X25519 public key object, starting from the key encoded as raw ``bytes``, in the format described in RFC7748. Args: encoded (bytes): The x25519 public key to import. It must be 32 bytes. Returns: :class:`Cryptodome.PublicKey.EccKey` : a new ECC key object. Raises: ValueError: when the given key cannot be parsed. r �r Zpoint_x)r r ��encodedr r r r �import_x25519_public_key � r c C � t | dd�S )a� Create a new X25519 private key object, starting from the key encoded as raw ``bytes``, in the format described in RFC7748. Args: encoded (bytes): The X25519 private key to import. It must be 32 bytes. Returns: :class:`Cryptodome.PublicKey.EccKey` : a new ECC key object. Raises: ValueError: when the given key cannot be parsed. r ��seedr �r �r r r r �import_x25519_private_key, � r" c C r )a� Create a new X448 public key object, starting from the key encoded as raw ``bytes``, in the format described in RFC7748. Args: encoded (bytes): The x448 public key to import. It must be 56 bytes. Returns: :class:`Cryptodome.PublicKey.EccKey` : a new ECC key object. Raises: ValueError: when the given key cannot be parsed. r r )r r r r r r �import_x448_public_key@ r r$ c C r )a� Create a new X448 private key object, starting from the key encoded as raw ``bytes``, in the format described in RFC7748. Args: encoded (bytes): The X448 private key to import. It must be 56 bytes. Returns: :class:`Cryptodome.PublicKey.EccKey` : a new ECC key object. Raises: ValueError: when the given key cannot be parsed. r r r r! r r r �import_x448_private_keyU r# r% c K sx | � dd�}| � dd�}| � dd�}| � dd�}| � dd�}|du r&td��d}d}d}d d � } |dur?| ||dd �}|d 7 }|durN| ||dd �}|d 7 }|dur]| ||dd �}|d 7 }|durl| ||dd �}|d 7 }|| dk sz|dksz|dkr~td��d} d} |r�|r�t||�} |r�|r�t|�t|�kr�td��t||�} n|r�|r�t||�} n |r�|r�t||�} | | } || �S )a� Perform a Diffie-Hellman key agreement. Keywords: kdf (callable): A key derivation function that accepts ``bytes`` as input and returns ``bytes``. static_priv (EccKey): The local static private key. Optional. static_pub (EccKey): The static public key that belongs to the peer. Optional. eph_priv (EccKey): The local ephemeral private key, generated for this session. Optional. eph_pub (EccKey): The ephemeral public key, received from the peer for this session. Optional. At least two keys must be passed, of which one is a private key and one a public key. Returns (bytes): The derived secret key material. � static_privN� static_pub�eph_priv�eph_pub�kdfz'kdf' is mandatoryr c S sZ t |t�s td| ��|r|�� std| ��| d u r |j} | S | |jkr+td| ��| S )Nz'%s' must be an ECC keyz '%s' must be a private ECC keyz('%s' is defined on an incompatible curve)� isinstancer � TypeErrorZ has_privater )r �key�nameZprivater r r � check_curve� s � z"key_agreement.<locals>.check_curveT� F� z'Too few keys for the ECDH key agreement� z"DH mode C(2e, 1s) is not supported)�getr r �bool) �kwargsr& r' r( r) r* Z count_privZ count_pubr r/ ZZsZZe�Zr r r � key_agreementi sN r7 N) ZCryptodome.Util.numberr ZCryptodome.PublicKey.ECCr r r r r r r" r$ r% r7 r r r r �<module> s
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