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How to recover public key with ECDSA? #37

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RobinLinus opened this issue Feb 11, 2017 · 0 comments
Open

How to recover public key with ECDSA? #37

RobinLinus opened this issue Feb 11, 2017 · 0 comments

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@RobinLinus
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RobinLinus commented Feb 11, 2017 •
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Any suggestions on how to implement public key recovery with WebCrypto ECDSA?

How is (r,s) encoded in the output buffer of sign?
Is it just r = [0,32) and s = [32,64) for curve = P-256 (docs) ?

Seams like elliptic.js implements the recovery and it should be possible to import the recovered public key via jwk back into WebCrypto ...
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