o ò§Mfe ã@s,ddlmZddlmZdd„Zdd„ZdS)é)Ú long_to_bytes)ÚEccKeycCs0|j|j}| ¡rtdƒ‚t|j| ¡ƒ}|S)NzInvalid ECDH point)ÚpointQÚdÚis_point_at_infinityÚ ValueErrorrÚxÚ size_in_bytes)Úkey_privÚkey_pubÚpointPÚz©rúS/var/www/html/humari/django-venv/lib/python3.10/site-packages/Crypto/Protocol/DH.pyÚ _compute_ecdhs rc Ksx| dd¡}| dd¡}| dd¡}| dd¡}| dd¡}|dur&tdƒ‚d}d}d}d d „} |dur?| ||dd ƒ}|d 7}|durN| ||dd ƒ}|d 7}|dur]| ||dd ƒ}|d 7}|durl| ||dd ƒ}|d 7}||dksz|dksz|dkr~tdƒ‚d} d} |r‹|r‹t||ƒ} |r¡|r¡t|ƒt|ƒkr›tdƒ‚t||ƒ} n|r«|r«t||ƒ} n |r´|r´t||ƒ} | | } || ƒS)aÌPerform 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. Ú static_privNÚ static_pubÚeph_privÚeph_pubÚkdfz'kdf' is mandatoryrcSsZt|tƒs td|ƒ‚|r| ¡std|ƒ‚|dur |j}|S||jkr+td|ƒ‚|S)Nz'%s' must be an ECC keyz'%s' must be a private ECC keyz('%s' is defined on an incompatible curve)Ú isinstancerÚ TypeErrorÚ has_privateÚcurve)rÚkeyÚnameÚprivaterrrÚ check_curve2s     þ z"key_agreement..check_curveTéFéz'Too few keys for the ECDH key agreementóz"DH mode C(2e, 1s) is not supported)ÚgetrrÚbool) ÚkwargsrrrrrÚ count_privÚ count_pubrrÚZsÚZeÚZrrrÚ key_agreementsN          r)N)ÚCrypto.Util.numberrÚCrypto.PublicKey.ECCrrr)rrrrÚs