micro ecc create wrong publickey in windows

RE: micro ecc create wrong publickey in windows

Eric — Tue, 21 Mar 2017 16:20:34 GMT

There is a define statement in uEcc.h(line48-line50) : #ifndef uECC_VLI_NATIVE_LITTLE_ENDIAN #define uECC_VLI_NATIVE_LITTLE_ENDIAN 0 #endif When we compile codes in Keil5, it's right. However, in windows, it doesn't work. If we change the value of uECC_VLI_NATIVE_LITTLE_ENDIAN from 0 to 1, it works well ,at least in VS2013. So what we should do is :

#ifndef uECC_VLI_NATIVE_LITTLE_ENDIAN #define uECC_VLI_NATIVE_LITTLE_ENDIAN 1 #endif

RE: micro ecc create wrong publickey in windows

Eric — Tue, 21 Mar 2017 16:18:58 GMT

Theoretically， that's impossible. I found my mistake just now. See my answer below.

RE: micro ecc create wrong publickey in windows

FormerMember — Tue, 21 Mar 2017 09:58:01 GMT

Could you check if the public key generated by windows will work with the private key that you have?

RE: micro ecc create wrong publickey in windows

Eric — Mon, 20 Mar 2017 13:39:17 GMT

For a specific curve(uECC_secp256r1), there's only one publickey, publickey=K*G(x,y), K is the private key. Somethong must be wrong, and I don't think uEcc works wrong, so I'm sure I do something wrong which I don't know. But where's my mistake?

RE: micro ecc create wrong publickey in windows

FormerMember — Mon, 20 Mar 2017 12:00:50 GMT

Theoretically, there can be more than one public key associated with a private key. Does it work to use both of the generated public keys with the one private key?