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implement KDF and PRF

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dabluwt
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implement KDF and PRF

Post by dabluwt » Mon Apr 10, 2017 11:17 pm

Hey all here,

I need to implement SCP03 by myself. Now I am trying to implement KDF and PRF. I wonder if there are any API functions beside AES cipher and key handling I could use?

Thanks a lot.
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mabel
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Re: implement KDF and PRF

Post by mabel » Tue Apr 11, 2017 5:39 am

You need to strictly follow the GP spec when implementing SCP03. SO JUST USE AES cipher.
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Re: implement KDF and PRF

Post by dabluwt » Tue Apr 11, 2017 6:02 am

The main thing I am worried about is implementation of key derivation.

The AES implementation on my card is written by native code. But I wrote this part using JAVA not native code, will there any problems?
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mabel
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Re: implement KDF and PRF

Post by mabel » Tue Apr 11, 2017 6:18 am

You don't need to worry about this.
In fact, AES is the same no matter by which language you implement.
Derivation will produce the same results in all languages.
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