Why are the RSA signatures I generate with openssl and golang different?

Question

I use openssl command to sign the message \"Test.\", output with hexdump

# echo \"Test.\" | openssl rsautl -inkey privite.key -sign -hexdump
0000 - 09 1b ce          


        

Answer 1

This is a very useful link.

// Sign secret with rsa with PKCS 1.5 as the padding algorithm
// The result should be exactly same as "openssl rsautl -sign -inkey "YOUR_RSA_PRIVATE_KEY" -in "YOUR_PLAIN_TEXT""
signer, err := rsa.SignPKCS1v15(rand.Reader, rsaPrivateKey.(*rsa.PrivateKey), crypto.Hash(0), []byte(message))

https://github.com/bitmartexchange/bitmart-go-api/blob/master/bm_client.go