Elliptic Curve PublicKey sharing between different platforms

Asked Sep 29 '17 at 13:11

Active Sep 29 '17 at 13:11

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I am trying to communicate between android(client), ios(client) and .net(webapi) platforms with Elliptic Curve.

When I try to generate public key on android platform with SpongyCastle, my web api could use this public key. This key's bytes length is 64.

But When I try to generate public key on ios with SwCrypt, my web api couldn't use this key. It throws IOException - "DER length more than 4 bytes: 119" . This key's bytes length is 65.

How can I generate Elliptic Curve key pairs on ios platform for communicate with .net web api? Thanks.

asked Sep 29 '17 at 13:11

oyenigun

"This key's bytes length is 65." - does it start with 0? – Justinas Jakavonis Oct 10 '17 at 07:40
Also it may be in encoded format. May be related: https://stackoverflow.com/questions/37477586/ecc-private-key-is-longer-than-public-key/37572497#37572497 – Justinas Jakavonis Oct 10 '17 at 07:42

Elliptic Curve PublicKey sharing between different platforms

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