[OpenSSL 1.1.1b FIPS on Fedora 29] What can a return code <= 0 from EVP_DigestSign(), with ERR_peek_error() return of 0, be caused by? ERR_error_string() decodes the 0 as "00000000:lib(0):func(0):reason(0)" (assuming the ERR_peek_error(), ERR_get_error() sequence is not lying to me) which is not very helpful. OTOH, ERR_get_error() docs says that 0 means "no error" - so why the fail return from the EVP call? The call was: EVP_DigestSign(ctx, NULL, &siglen, NULL, 0) - i.e. I'm asking for the siglen, so that I can allocate memory for the sig. -- Thanks, Jeremy
