[openssl-users] FIPS methods and symlinks

Dr. Stephen Henson steve at openssl.org
Tue Feb 24 16:16:17 UTC 2015

On Tue, Feb 24, 2015, jonetsu wrote:

> Hello,
>   To grasp how FIPS methods are called, and following one method
> as an example, HMAC_Update() in hmac.c, we can see that if FIPS
> mode is active then FIPS_hmac_update() will be called.  This is
> fine although searching the sources for the physical definiton of
> FIPS_hmac_update() does not yield any results.  How does the
> symbolic links function, what ends up being executed in this case
> and through which path ?

Function names get changed through fips/fipssyms.h in the FIPS module source.

Dr Stephen N. Henson. OpenSSL project core developer.
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