Hello, Please advise me if you know this issue. I need to know how to sign a message using ECDSA. I have a message which is a variable length unsigned char array. And I have a private key which is a 32 byte unsigned char array. And I am trying to figure out how to sign the message using my own private and generate the ECDSA signature which I think include an R and S values. I already searched online for some C++ example, but they all require the private key to be generated. But I want to load my own key instead. So I wonder if you have any sample C++ that allows me to load my private key and sign my message using ECDSA. Thank you.
Regards, Chuong D. Khuc
