EVP_get_digestbyname : what is this ..?

Question

I need to use this function

EVP_get_digestbyname(OBJ_nid2sn(i));

Whenever I call this function it returns NULL only .. how to fix this problem?

My value for i is 65 (RSA-SHA1).

Thanks

Answer 1

Did you call

OpenSSL_add_all_algorithms();

first (ideally when initializing your application) ? This ensures that the algorithms and error messages get properly loaded. After that your call should succeed (cf. the doc on this subject).