Thanks for your answer. I passed "hello" message into function to compare results, but in real use it will be the SHA1 disgest of the message. So I haven't access to the message content, just its SHA1 disgest. How can I sign the digest using openSSL function (like EVP_SignUpdate ...) to not perform hash automatically ? I can't use openSSL 1.0.0 & the EVP_PKEY... functions. I tested using EVP_md_null() hash function but this returns null-hash. Is there an equivalent to return input data without modifications ?
Clément MARCEL clement.mar...@icanopee.fr
