[erlang-questions] crypto ECDSA private key -> public

Ingela Andin ingela.andin@REDACTED
Mon Oct 27 22:34:27 CET 2014


There is also a function crypto:generate_key/3 that takes a private key as
third argument, maybe that is what you want?

Regards Ingela Erlang/OTP team - Ericsson AB

2014-10-21 17:00 GMT+02:00 semmit mondo <semmitmondo@REDACTED>:

> Hi,
> How can I generate an ECDSA public key from the private one using crypto?
> All I can do with it is to generate a public and private key pair at once:
>   {Pub, Priv} = crypto:generate_key(ecdh, prime239v3).
> but can't calculate the public key if the private key was known beforehand.
> (prime239v3 isn't important, it could be any EC curve...)
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