Document URL: 
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing_monitoring_and_updating_the_kernel/signing-a-kernel-and-modules-for-secure-boot_managing-monitoring-and-updating-the-kernel?fireglass_rsn=true#generating-a-public-and-private-key-pair_signing-a-kernel-and-modules-for-secure-boot

Section Number and Name: 
3.6. Generating a public and private key pair

Describe the issue: 
On a system which has FIPS enabled, running the command given results in the below error: 

# efikeygen --dbdir /etc/pki/pesign \
            --self-sign \
            --module \
            --common-name 'CN=Organization signing key' \
            --nickname 'Custom Secure Boot key'

efikeygen: efikeygen.c:main:XXX: could not find NSS slot for token "NSS Certificate DB": Unrecognized Object Identifier.

Suggestions for improvement: 
On FIPS systems, an additional option ' --token "NSS FIPS 140-2 Certificate DB"' is required: 

# efikeygen --dbdir /etc/pki/pesign \
            --self-sign \
            --module \
            --common-name 'CN=Organization signing key' \
            --nickname 'Custom Secure Boot key'
            --token "NSS FIPS 140-2 Certificate DB"

Additional information: 
Without this option,  efikeygen fails to find the default token "NSS Certificate DB" in the PKI database. And this is expected, because in FIPS mode, the token has to be "NSS FIPS 140-2 Certificate DB".