Is there any framework or functions for ECDSA i... |Apple Developer Forums

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Latest reply on Dec 28, 2016 3:09 PM by eskimo

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kosger Dec 26, 2016 12:07 PM

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

Re: Is there any framework or functions for ECDSA in iOS?

Apple Staff (13,125 points)
eskimo Dec 26, 2016 1:35 PM (in response to kosger)

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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- Re: Is there any framework or functions for ECDSA in iOS?
  
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  kosger Dec 28, 2016 6:30 AM (in response to eskimo)
  
  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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  - Re: Is there any framework or functions for ECDSA in iOS?
    
    Apple Staff (13,125 points)
    eskimo Dec 28, 2016 3:09 PM (in response to kosger)
    
    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"
    
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