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package java.security.cert;

import java.math.BigInteger;
import java.util.Date;
import javax.security.auth.x500.X500Principal;

import sun.security.x509.X509CRLEntryImpl;


Abstract class for a revoked certificate in a CRL (Certificate
Revocation List).
The ASN.1 definition for revokedCertificates is:

revokedCertificates    SEQUENCE OF SEQUENCE  {
    userCertificate    CertificateSerialNumber,
    revocationDate     ChoiceOfTime,
    crlEntryExtensions Extensions OPTIONAL
                       -- if present, must be v2
}  OPTIONAL
CertificateSerialNumber  ::=  INTEGER
Extensions  ::=  SEQUENCE SIZE (1..MAX) OF Extension
Extension  ::=  SEQUENCE  {
    extnId        OBJECT IDENTIFIER,
    critical      BOOLEAN DEFAULT FALSE,
    extnValue     OCTET STRING
                  -- contains a DER encoding of a value
                  -- of the type registered for use with
                  -- the extnId object identifier value
}



Author:Hemma Prafullchandra
See Also:
Since:1.2
/**
 * <p>Abstract class for a revoked certificate in a CRL (Certificate
 * Revocation List).
 *
 * The ASN.1 definition for <em>revokedCertificates</em> is:
 * <pre>
 * revokedCertificates    SEQUENCE OF SEQUENCE  {
 *     userCertificate    CertificateSerialNumber,
 *     revocationDate     ChoiceOfTime,
 *     crlEntryExtensions Extensions OPTIONAL
 *                        -- if present, must be v2
 * }  OPTIONAL
 *
 * CertificateSerialNumber  ::=  INTEGER
 *
 * Extensions  ::=  SEQUENCE SIZE (1..MAX) OF Extension
 *
 * Extension  ::=  SEQUENCE  {
 *     extnId        OBJECT IDENTIFIER,
 *     critical      BOOLEAN DEFAULT FALSE,
 *     extnValue     OCTET STRING
 *                   -- contains a DER encoding of a value
 *                   -- of the type registered for use with
 *                   -- the extnId object identifier value
 * }
 * </pre>
 *
 * @see X509CRL
 * @see X509Extension
 *
 * @author Hemma Prafullchandra
 * @since 1.2
 */

public abstract class X509CRLEntry implements X509Extension {

    
Constructor for subclasses to call.

/**
     * Constructor for subclasses to call.
     */
    public X509CRLEntry() {}

    
Compares this CRL entry for equality with the given object. If the other object is an instanceof X509CRLEntry, then its encoded form (the inner SEQUENCE) is retrieved and compared with the encoded form of this CRL entry. 
Params:
  • other – the object to test for equality with this CRL entry.
Returns:true iff the encoded forms of the two CRL entries
match, false otherwise.
/**
     * Compares this CRL entry for equality with the given
     * object. If the {@code other} object is an
     * {@code instanceof} {@code X509CRLEntry}, then
     * its encoded form (the inner SEQUENCE) is retrieved and compared
     * with the encoded form of this CRL entry.
     *
     * @param other the object to test for equality with this CRL entry.
     * @return true iff the encoded forms of the two CRL entries
     * match, false otherwise.
     */
    public boolean equals(Object other) {
        if (this == other)
            return true;
        if (!(other instanceof X509CRLEntry))
            return false;
        try {
            byte[] thisCRLEntry = this.getEncoded();
            byte[] otherCRLEntry = ((X509CRLEntry)other).getEncoded();

            if (thisCRLEntry.length != otherCRLEntry.length)
                return false;
            for (int i = 0; i < thisCRLEntry.length; i++)
                 if (thisCRLEntry[i] != otherCRLEntry[i])
                     return false;
        } catch (CRLException ce) {
            return false;
        }
        return true;
    }

    
Returns a hashcode value for this CRL entry from its
encoded form.

Returns:the hashcode value.
/**
     * Returns a hashcode value for this CRL entry from its
     * encoded form.
     *
     * @return the hashcode value.
     */
    public int hashCode() {
        int     retval = 0;
        try {
            byte[] entryData = this.getEncoded();
            for (int i = 1; i < entryData.length; i++)
                 retval += entryData[i] * i;

        } catch (CRLException ce) {
            return(retval);
        }
        return(retval);
    }

    
Returns the ASN.1 DER-encoded form of this CRL Entry,
that is the inner SEQUENCE.

Throws:
Returns:the encoded form of this certificate
/**
     * Returns the ASN.1 DER-encoded form of this CRL Entry,
     * that is the inner SEQUENCE.
     *
     * @return the encoded form of this certificate
     * @throws    CRLException if an encoding error occurs.
     */
    public abstract byte[] getEncoded() throws CRLException;

    
Gets the serial number from this X509CRLEntry,
the userCertificate.

Returns:the serial number.
/**
     * Gets the serial number from this X509CRLEntry,
     * the <em>userCertificate</em>.
     *
     * @return the serial number.
     */
    public abstract BigInteger getSerialNumber();

    
Get the issuer of the X509Certificate described by this entry. If
the certificate issuer is also the CRL issuer, this method returns
null.

This method is used with indirect CRLs. The default implementation
always returns null. Subclasses that wish to support indirect CRLs
should override it.

Returns:the issuer of the X509Certificate described by this entry
or null if it is issued by the CRL issuer.
Since:1.5
/**
     * Get the issuer of the X509Certificate described by this entry. If
     * the certificate issuer is also the CRL issuer, this method returns
     * null.
     *
     * <p>This method is used with indirect CRLs. The default implementation
     * always returns null. Subclasses that wish to support indirect CRLs
     * should override it.
     *
     * @return the issuer of the X509Certificate described by this entry
     * or null if it is issued by the CRL issuer.
     *
     * @since 1.5
     */
    public X500Principal getCertificateIssuer() {
        return null;
    }

    
Gets the revocation date from this X509CRLEntry,
the revocationDate.

Returns:the revocation date.
/**
     * Gets the revocation date from this X509CRLEntry,
     * the <em>revocationDate</em>.
     *
     * @return the revocation date.
     */
    public abstract Date getRevocationDate();

    
Returns true if this CRL entry has extensions.

Returns:true if this entry has extensions, false otherwise.
/**
     * Returns true if this CRL entry has extensions.
     *
     * @return true if this entry has extensions, false otherwise.
     */
    public abstract boolean hasExtensions();

    
Returns a string representation of this CRL entry.

Returns:a string representation of this CRL entry.
/**
     * Returns a string representation of this CRL entry.
     *
     * @return a string representation of this CRL entry.
     */
    public abstract String toString();

    
Returns the reason the certificate has been revoked, as specified
in the Reason Code extension of this CRL entry.

Returns:the reason the certificate has been revoked, or null if this CRL entry does not have a Reason Code extension
Since:1.7
/**
     * Returns the reason the certificate has been revoked, as specified
     * in the Reason Code extension of this CRL entry.
     *
     * @return the reason the certificate has been revoked, or
     *    {@code null} if this CRL entry does not have
     *    a Reason Code extension
     * @since 1.7
     */
    public CRLReason getRevocationReason() {
        if (!hasExtensions()) {
            return null;
        }
        return X509CRLEntryImpl.getRevocationReason(this);
    }
}