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Bug 1718074

Summary: stop using GHmac
Product: Red Hat Enterprise Linux 8 Reporter: Colin Walters <walters>
Component: cockpitAssignee: Martin Pitt <mpitt>
Status: CLOSED NOTABUG QA Contact: Release Test Team <release-test-team-automation>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 8.1   
Target Milestone: rc   
Target Release: 8.0   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-06-06 20:40:11 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1630260, 1896162    

Description Colin Walters 2019-06-06 20:13:30 UTC 
See https://bugzilla.redhat.com/show_bug.cgi?id=1630260
Comment 1 Colin Walters 2019-06-06 20:21:29 UTC 
Specifically https://bugzilla.redhat.com/show_bug.cgi?id=1630260#c24

TL;DR it's possible for 8.1 glib will switch to making usage of g_hmac_*() a fatal error.  You need to switch to a FIPS-validated library such as OpenSSL.
Comment 2 Martin Pitt 2019-06-06 20:40:11 UTC 
GHMac is only being used in src/ssh/cockpitsshknownhosts.c. This is only a backwards compat shim for libssh 0.7, i. e. for RHEL 7 builds. This entire file isn't built for RHEL 8:

if !HAVE_SSH_SESSION_HAS_KNOWN_HOSTS_ENTRY
libcockpit_ssh_a_SOURCES += \
        src/ssh/cockpitsshknownhosts.h \
        src/ssh/cockpitsshknownhosts.c \
        $(NULL)
endif

So this isn't an issue for RHEL 8.

As soon as RHEL 7.7 is released, we can stop supporting RHEL 7 in our upstream master branch and then throw out two metric tons of obsolete code, also this one. :-) But this will just affect source code grepping, not runtime behaviour.