Hello! Climbing through https://developers.google.com/pay/api/payment-data-cryptography#encrypt-spec . At this point, ECDH deriving shared secret works with our keys + random generated, but not with Google ephemeral and public.
Am I right, that outer public and ephemeral should be 65 bytes long? On auto-generated keys by DH2 it is so. (Using curve P-256, it is sec256r1 in CryptoPP ) Grabbing google key (public outer) from here: https://payments.developers.google.com/paymentmethodtoken/keys.json . After base64 decoding it is 91 byte length, not 65. is it because of it is in X509? This question may be trivial - I'm a newbie in cpp and crypting. Thank you very much! -- You received this message because you are subscribed to "Crypto++ Users". More information about Crypto++ and this group is available at http://www.cryptopp.com and http://groups.google.com/forum/#!forum/cryptopp-users. --- You received this message because you are subscribed to the Google Groups "Crypto++ Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
