• Version:6.1.0.0
• Platform:Linux 8df1860c1f5b 4.9.12-moby deps: update openssl to 1.0.1j #1 SMP Tue Feb 28 12:11:36 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
• Subsystem:crypto

When using a fips enabled build of node:

• using only application control of fips with crypto.fips = 0 or 1 works as expected
• --enable-fips and crypto.fips=0 - working as expected (FIPS disabled)
• --force-fips and crypto.fips=0 - working as expected with following error

crypto.fips = 0;
            ^

Error: Cannot set FIPS mode, it was forced with --force-fips at startup.)
with --enable-fips or --force-fips and crypto.fips = 1 the app fails (
crypto.fips = 1;
            ^

Error: error:2D078072:FIPS routines:FIPS_module_mode_set:fips mode already set

I'm trying to build a migration plan for adopting fips and having both crypto.fips = 1 in the application and --enable-fips or --force-fips seems like a valid use case to me ?