OpenSSH FIPS 140-2 support using OpenSSL FIPS modules?

[Roumen Petrov]

security veteran wrote:
> Thanks Roumen.
>
> I have few more questions below:
>
> 1. What version of OpenSSH can the patch be applied to? What branch should
> I check out the patch?
There is no separate patch but I offer file with all differences to 
openssh - see link (diff) on download page 
http://roumenpetrov.info/openssh/download.html

> 2.
>> Impact is not only for source code. Build process has to be updated as
> well. Red Hat is based on "fipscheck".
> What build process should be changed? What is fipscheck?
I different way to check integrity of files(executables) - 
https://fedorahosted.org / fipscheck/ .

> 3. My understanding any application (such as OpenSSH) which need to use the
> OpenSSL FIPS module will need to invoke the "FIPS_mode_set()" function
> first, otherwise the OpenSSL library will be operating as the non-FIPS
> version.
> My question is, how and when does OpenSSH server invoke the FIPS function?
Lets assume that application use OpenSSL FIPS validated module. FIPS 
mode is activated in openssl command if environment variable 
OPENSSL_FIPS is set. Similarly I use OPENSSL_FIPS environment variable 
to activate FIPS mode. Code will call FIPS_mode_set(1) if crypto module 
is not FIPS mode.


[SNIP]

Roumen