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Chapter 24. Verifying certificates using IdM Healthcheck
Learn more about understanding and using the Healthcheck tool in Identity management (IdM) to identify issues with IPA certificates maintained by certmonger.
For details, see Healthcheck in IdM.
24.1. IdM certificates Healthcheck tests
The Healthcheck tool includes several tests for verifying the status of certificates maintained by certmonger in Identity Management (IdM). For details about certmonger, see Obtaining an IdM certificate for a service using certmonger.
This suite of tests checks expiration, validation, trust and other issues. Multiple errors may be thrown for the same underlying issue.
To see all certificate tests, run the ipa-healthcheck with the --list-sources option:
# ipa-healthcheck --list-sources
You can find all tests under the ipahealthcheck.ipa.certs source:
- IPACertmongerExpirationCheck
This test checks expirations in
certmonger.If an error is reported, the certificate has expired.
If a warning appears, the certificate will expire soon. By default, this test applies within 28 days or fewer days before certificate expiration.
You can configure the number of days in the
/etc/ipahealthcheck/ipahealthcheck.conffile. After opening the file, change thecert_expiration_daysoption located in the default section.NoteCertmonger loads and maintains its own view of the certificate expiration. This check does not validate the on-disk certificate.
- IPACertfileExpirationCheck
This test checks if the certificate file or NSS database cannot be opened. This test also checks expiration. Therefore, carefully read the
msgattribute in the error or warning output. The message specifies the problem.NoteThis test checks the on-disk certificate. If a certificate is missing, unreadable, etc a separate error can also be raised.
- IPACertNSSTrust
- This test compares the trust for certificates stored in NSS databases. For the expected tracked certificates in NSS databases the trust is compared to an expected value and an error raised on a non-match.
- IPANSSChainValidation
-
This test validates the certificate chain of the NSS certificates. The test executes:
certutil -V -u V -e -d [dbdir] -n [nickname] - IPAOpenSSLChainValidation
This test validates the certificate chain of the OpenSSL certificates. To be comparable to the
NSSChainvalidation here is the OpenSSL command we execute:openssl verify -verbose -show_chain -CAfile /etc/ipa/ca.crt [cert file]
- IPARAAgent
-
This test compares the certificate on disk with the equivalent record in LDAP in
uid=ipara,ou=People,o=ipaca. - IPACertRevocation
- This test uses certmonger to verify that certificates have not been revoked. Therefore, the test can find issues connected with certificates maintained by certmonger only.
- IPACertmongerCA
This test verifies the certmonger Certificate Authority (CA) configuration. IdM cannot issue certificates without CA.
Certmonger maintains a set of CA helpers. In IdM, there is a CA named IPA which issues certificates through IdM, authenticating as a host or user principal, for host or service certs.
There are also
dogtag-ipa-ca-renew-agentanddogtag-ipa-ca-renew-agent-reusewhich renew the CA subsystem certificates.
Run these tests on all IdM servers when trying to check for issues.
24.2. Screening certificates using the Healthcheck tool
Follow this procedure to run a standalone manual test of an Identity Management (IdM) certificate health check using the Healthcheck tool.
The Healthcheck tool includes many tests, therefore, you can shorten the results with:
-
Excluding all successful test:
--failures-only -
Including only certificate tests:
--source=ipahealthcheck.ipa.certs
Prerequisites
-
You must perform Healthcheck tests as the
rootuser.
Procedure
To run Healthcheck with warnings, errors and critical issues regarding certificates, enter:
# ipa-healthcheck --source=ipahealthcheck.ipa.certs --failures-only
Successful test displays empty brackets:
[]
Failed test shows you the following output:
{
"source": "ipahealthcheck.ipa.certs",
"check": "IPACertfileExpirationCheck",
"result": "ERROR",
"kw": {
"key": 1234,
"dbdir": "/path/to/nssdb",
"error": [error],
"msg": "Unable to open NSS database '/path/to/nssdb': [error]"
}
}
This IPACertfileExpirationCheck test failed on opening the NSS database.
Additional resources
-
See
man ipa-healthcheck.
