D Extensions

Oracle Application Server Certificate Authority is compliant with the X.509 V3 and IETF's PKIX standards, and supports standard extensions as described in this Appendix.

Certificate Usage

OracleAS Certificate Authority enables users to select the function of a requested certificate to fit their intended applications and their enterprise policies. The default as shipped is "Authentication, Encryption, and Signing," but the administrator can configure a different choice, which then becomes the preselected default for that site. Table D-1 shows the possible choices:

Table D-1 Types of Certificate Usage

Function	Description
Authentication	Enables secure identification when requesting or providing access or services, such as when logging into an enterprise portal. (Typically, SSL protocol is used.)
Encryption	Enables encrypting and decrypting electronic documents
Signing	Enables verifiable signature for (and assures non-tampering of) electronic documents, including email (using S/MIME, the Secure Multipurpose Internet Mail Extension)
Authentication, Encryption	Certificate can be used for both purposes.
Authentication, Signing	Certificate can be used for both purposes.
Authentication, Encryption, and Signing	Certificate can be used for all three purposes.
Encryption, Signing	Certificate can be used for both purposes.
CA Signing	Used to sign users' certificates or Certificate Revocation List (CRL).
Code Signing	Provides verifiable signature for the provider of (and assures non-tampering of) Java code, JavaScript, and other signed files.

Policy Application to Certificates

Certain policies apply to certificates intended for particular uses, as described in Table D-2 .

Table D-2 Policies Applied for Particular Certificate Usages

Certificate Usage	Basic Constraints (Critical)	Key Usage (Non Critical)	Extended Key Usage (Non Critical)	Subject Alternate Name (Non Critical)
CA certificate	CA flag set to true PathLength: + root CA (generated during installation), value hardcoded to 3 root CA (generated using `OCACTL`), value can be chosen.	Signing Certificates (Keys) Sign ing CRLs
Client Authentication		Digital Signature	clientAuth	rfc822Name=email AND/OR otherName=UID
Server Authentication		Digital Signature Key Encipherment	serverAuth	rfc822Name=email AND/OR otherName=UID
Signing		Digital Signature Non-Repudiation	emailProtection	rfc822Name=email AND/OR otherName=UID
Encryption		Data Encipherment Key Encipherment	emailProtection
Code Signing		Digital Signature	codeSigning	rfc822Name=email AND/OR otherName=UID