STIGUI
V-256589CAT II — Medium severitySV-256589r1137699_rule

The Photon operating system must implement NIST FIPS-validated cryptography for the following: to provision digital signatures, generate cryptographic hashes, and protect unclassified information requiring confidentiality and cryptographic protection in accordance with applicable federal laws, Executive Orders, directives, policies, regulations, and standards.

Rule version PHTN-30-000240 · STIG v1 · 2026-08-31

Discussion

Use of weak or untested encryption algorithms undermines the purposes of using encryption to protect data. The operating system must implement cryptographic modules adhering to the higher standards approved by the federal government because this provides assurance they have been tested and validated.

Check

At the command line, run the following command:

# cat /proc/sys/crypto/fips_enabled

If a value of "1" is not returned, this is a finding.

Fix

Navigate to and open:

/boot/grub2/grub.cfg

Locate the kernel command line, which will start with "linux", and add "fips=1" to the end. For example:

linux /$photon_linux audit=1 root=$rootpartition $photon_cmdline coredump_filter=0x37 consoleblank=0 $systemd_cmdline fips=1

Reboot the system for the change to take effect.

Note: The "fipsify" package must be installed for FIPS mode to work properly.

Identifiers

Group ID
V-256589
Group title
SRG-OS-000478-GPOS-00223
Rule ID
SV-256589r1137699_rule
Check ID
C-60264r887439_chk
Fix ID
F-60207r887440_fix