4 Oracle Security Engine

This chapter provides information about using the Oracle Security Engine Software Development Kit (SDK) certificate package. Oracle Security Engine is a superset of Oracle Crypto. It contains all of the libraries and tools provided with Oracle Crypto, plus additional packages and utilities for generating digital certificates.


The use of the Oracle Security Engine library is not recommended beginning with Oracle AS 11gR1. Instead use the JDK's Certificate APIs.

For details, see the JDK documentation at:


However, the following Public-Key Cryptography Standards (PKCS) have no JCE equivalents:

  • PKCS#7

  • PKCS#10

  • Signed Public Key And Challenge (SPKAC)

and you can continue using Oracle Security Engine for these features.

Oracle Crypto allows Java developers to develop applications that ensure data security and integrity. For more information about the Oracle Crypto functionality, see "Oracle Crypto" in Chapter 3.

For an overview of public key infrastructure, see "Public Key Infrastructure (PKI)" in Chapter 1.

This chapter contains the following topics:

4.1 Oracle Security Engine Features and Benefits

Oracle Security Engine provides the following features:

4.1.1 Oracle Security Engine Packages

The Oracle Security Engine toolkit contains the following packages:

  • oracle.security.crypto.cert - Facilities for handling digital certificates, CRLs, and PKCS#12.

  • oracle.security.crypto.cert.ext - Standard X.509 certificates and CRL extensions.

4.2 Setting Up Your Oracle Security Engine Environment

The Oracle Security Developer Tools are installed with Oracle WebLogic Server in ORACLE_HOME. This section provides information for setting up your environment for Oracle Security Engine. It contains the following topics:

4.2.1 System Requirements for Oracle Security Engine

In order to use Oracle Security Engine, your system must have the Java Development Kit (JDK) version 1.6 or higher.

4.2.2 Setting the CLASSPATH Environment Variable

Your CLASSPATH environment variable must contain the full path and file names to the required jar and class files. Make sure the following items are included in your CLASSPATH:

  • osdt_core.jar

  • osdt_cert.jar Setting the CLASSPATH on Windows

To set your CLASSPATH on Windows:

  1. In your Windows Control Panel, select System.

  2. In the System Properties dialog, select the Advanced tab.

  3. Click Environment Variables.

  4. In the User Variables section, click New to add a CLASSPATH environment variable for your user profile. If a CLASSPATH environment variable already exists, select it and click Edit.

  5. Add the full path and file names for all of the required jar and class files to the CLASSPATH.

    For example, your CLASSPATH might look like this:

  6. Click OK. Setting the CLASSPATH on UNIX

To set your CLASSPATH on UNIX, set your CLASSPATH environment variable to include the full path and file name of all of the required jar and class files. For example:


4.3 Core Classes and Interfaces

This section provides information and code samples for using the certificate facility classes of Oracle Security Engine. Oracle Security Engine also includes all of the classes provided with Oracle Crypto. See Chapter 3, "Oracle Crypto" for an overview of the core Oracle Crypto classes.

Class Changes in OracleAS 11gR1

In OracleAS 11gR1, the oracle.security.crypto.cert.X509 class for certificate management has been replaced with java.security.cert.X509Certificate

The Core Certificate Classes

The core certificate facility classes are:

4.3.1 The oracle.security.crypto.cert.X500RDN Class

This class represents an X.500 Relative Distinguished Name (RDN). This is the building block for X.500 names. A RDN consists of a set of attribute-value pairs. Typically, there is a single attribute-value pair in each RDN.

Example 4-1 Code Example for Creating and Retrieving an X500RDN Object

// Create the X500RDN object
X500RDN rdn = new X500RDN(PKIX.id_at_commonName, "Joe Smith");

// Retrieve the value
X500Name n = Instance of oracle.security.crypto.cert.X500Name;
String name = n.getAttribute(PKIX.id_at_commonName).getValue().getValue();

4.3.2 The oracle.security.crypto.cert.X500Name Class

This class represents distinguished names as used in the X.500 series of specifications, defined in X.520. An X500Name object is made of X500RDN objects. An X500Name holds attributes defining an entity such as the common name, country, organization, and so on.

To create an X500Name object, use the standard constructor and then populate the object with attributes. Once created, the object can then be DER-encoded to make it available to other processes:

Example 4-2 Code Example for Creating an X500Name Object

X500Name name = new X500Name();
name.addComponent(PKIX.id_at_commonName, "Joe Smith");
name.addComponent(PKIX.id_at_countryName, "USA");
name.addComponent(PKIX.id_at_stateOrProvinceName, "NY");
name.addComponent(PKIX.id_at_localityName, "New York");
name.addComponent(PKIX.id_at_organizationName, "Oracle");
name.addComponent(PKIX.id_at_organizationalUnitName, "Engineering");
name.addComponent(PKIX.emailAddress, "joe.smith@example.com");

// Make object DER-encoded so its available to other processes 

byte[] encodedName = Utils.toBytes(name);
X500Name n = new X500Name(new ByteArrayInputStream(encodedName));
String name = n.getAttribute(PKIX.id_at_commonName).getValue().getValue();
String email = n.getAttribute(PKIX.emailAddress).getValue().getValue();

4.3.3 The oracle.security.crypto.cert.CertificateRequest Class

This class represents a PKCS#10 certificate request containing information about an entity and a signature of the content of the request. The certificate request is used to convey information and authentication data (the signature) that will be used by a Certificate Authority (CA) to generate a certificate for the corresponding entity.

Creating a new certificate request involves the following high-level steps:

  1. Create a new instance of CertificateRequest by using the empty constructor and setting the keys and the subject name, or by using the constructor taking an X500Name and a KeyPair object.

  2. Add X.509 extensions to the certificate request.

  3. Sign the certificate request and save it to a file.

  4. Send the certificate request you created to a Certificate Authority.

Example 4-3 Code Example for Creating a Certificate Request

//Create CertificateRequest by setting the keys and subject name
 CertificateRequest certReq = new CertificateRequest();


// Create CertificateRequest by taking an X500Name and KeyPair object
CertificateRequest certReq = new CertificateRequest(subjectName, keyPair);

// Add X.509 certificate extensions in a extensionRequest attribute
X509ExtensionSet extSet = new X509ExtensionSet();

// Basic Constraints: non-CA, critical
extSet.addExtension(new BasicConstraintsExtension(false, true));

// Key Usage: signature, data encipherment, key agreement 
// & non-repudiation flags, critical
extSet.addExtension(new KeyUsageExtension(new int[] {

// Subject Alternative Name: email address, non-critical
if (email.length() > 0)
    extSet.addExtension(new SubjectAltNameExtension(
        new GeneralName(GeneralName.Type.RFC822_NAME, email), false));

// Subject Key Identifier: key ID bytes, non-critical
extSet.addExtension(new SubjectKeyIDExtension
req.addAttribute(PKIX.extensionRequest, extSet);

// Sign the certificate request and save to file
// The certificate request can then be sent to a CA

4.3.4 The java.security.cert.X509Certificate Class


This class replaces oracle.security.crypto.cert.X509 for X.509 certificate management in Oracle WebLogic Server 11g.

The java.security.cert.X509Certificate class supports the generation of new certificates as well as parsing of existing certificates.

Complete documentation of the java.security.cert.X509Certificate class is available at http://java.sun.com/j2se/1.4.2/docs/api/java/security/cert/X509Certificate.html.

Converting Your Code to Use java.security.cert.X509Certificate

You can create the X509Certificate object using the certificate factory java.security.cert.CertificateFactory.

The certificate is generated from an input stream, which can be:

  • a FileInputSream, if the certificate is stored in a file, or

  • a ByteArrayInputStream, if the encoded bytes are from an existing X509 object, or

  • any other source.

An example follows:

// Generating an X.509 certificate from a file-based certificate
CertificateFactory cf = CertificateFactory.getInstance("X.509");
X509Certificate cert = (X509Certificate)cf.generateCertificate(
                       new FileInputStream(certFileName);


4.4 The Oracle Security Engine Java API Reference

The Oracle Security Engine Java API reference (Javadoc) is available at:

Oracle Fusion Middleware Security Engine Java API Reference for Oracle Security Developer Tools