zcode1

Can you clarify if both ecdsa_sign() and ecdsa_verify() are currently not working? I'm particularly interested in using verify for one particular curve at the moment. Also, I was curious why...

Ok, thanks for the clarification. Below is a link to the openssl code. Your algorithm looks similar, although I'm not familiar enough with the functions to understand any differences. https://github.com/openssl/openssl/blob/master/crypto/ec/ecdsa_ossl.c#L434

I was hoping to sign a message using openssl and then pass it to your ecdsa_verify() function to verify. However I realized that your curve parameters are in reverse order...

Hi @kokke, I have come back to look at the verify steps in more detail... I see you have opened an issue regarding point multiplication - please confirm your changed...

@kokke, Looking further at step 4) w = inv(s) mod n Using this example calculator (https://www.xarg.org/tools/modular-inverse-calculator/) x = a^-1 mod m input: a=3, m=11 output: x = 4 When I...