Correct ECIES shared key length check

obscuren / ecies

ECIES implemented in Go

BSD 3-Clause "New" or "Revised" License

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Closed Gustav-Simonsson closed 9 years ago

Gustav-Simonsson commented 9 years ago

Ensure the ECIES shared key is padded with zero bytes if it's smaller than the requested key length.
Split the ECIES shared key error into two; one for when the generated key is too big for the params and one for when it's nil (point of infinity returned by the curve scalar multiplication).

Gustav-Simonsson commented 9 years ago

Fixes this one: https://github.com/ethereum/go-ethereum/issues/227 Thanks to @fjl for help with debugging & coding.