EVP_DigestSignUpdate missing from libcrypto

Matt Caswell matt at openssl.org
Wed Sep 16 14:26:48 UTC 2020

On 16/09/2020 15:23, Sage Gerard wrote:
> I'm okay with using EVP_DigestSign, but both that and online materials
> presume EVP_DigestSignUpdate's availability, and the source code does
> not seem to have a directive to exclude the signature or implementation
> at first glance. What can explain the symbol's absense?

Its a macro:

# define EVP_DigestSignUpdate(a,b,c)     EVP_DigestUpdate(a,b,c)

So, the symbol in libcrypto.so is called EVP_DigestUpdate.

Note that this isn't the case in OpenSSL 3.0. It is a full symbol in its
 own right there.


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