Certificate extensions

PKITP supports the following certificate extensions:
AuthorityInformationAccess
Checked for form only.
AuthorityKeyIdentifier
Checked for form only.
BasicConstraints
For CA certificate, cA flag must be on. Also checked for certification path length.
CertificatePolicies
See Certificate policies.
CRLDistributionPoints
See Checking certificate status with PKITP.
HostIdMappings
Checked for form only.
IssuerAltName
Checked for form only. Must be marked critical if the issuer DN is empty.
KeyUsage
For CA certificates, the key CertSign flag must be on.
SubjectAltName
Checked for form only. Must be marked critical if the subject DN is empty.
SubjectKeyIdentifier
Checked for form only.
All other extensions are ignored if they are not marked critical. Unsupported critical extensions prevent certificate validation.