Is there any framework or functions for ECDSA in iOS?

Question

Is there any framework or functions for ECDSA in iOS?
I can not find this information in documentation. Please, can you show me if it is possible to implement ECDSA using some native framework. I can implement it using OpenSSL but Apple has deprecated it. Therefore, I think Apple could provide some other ways. Also I need some other information if it is possible:

could I use different hash functions (for example SHA256)
do I have an ability to recover public key by data hash and signature
what curve types could I use

Thank you for reply.

Konstantin

Security

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Posted by

kosger

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Answer 1

Is there any framework or functions for ECDSA in iOS?

Are you trying to implement ECDSA as part of TLS? Or ECDSA in some other context?

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Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

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eskimo

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Answer 2

Thank you for respose.

> Are you trying to implement ECDSA as part of TLS?

No, I am not. I am trying to use ECDSA to sign and verify encrypted user messages, so it is not a part of TLS context

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kosger

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Answer 3

I believe you can do this using the new ‘unified’ crypto API. Take a look at all the new-in-iOS 10 stuff in

<Security/SecKey.h>

. I’ve used this stuff for RSA and it worked really well (see the CryptoCompatibility sample code) but I haven’t yet had a chance to try out the ECDSA stuff.

Share and Enjoy
—
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

Posted by

eskimo

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Is there any framework or functions for ECDSA in iOS?

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