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package sun.security.jgss.krb5;

import org.ietf.jgss.*;
import sun.security.jgss.spi.*;
import java.util.Date;
import sun.security.krb5.internal.Ticket;

Implements the krb5 proxy credential element used in constrained delegation. It is used in both impersonation (where there is no Kerberos 5 communication between the middle server and the client) and normal constrained delegation (where there is, but client has not called requestCredDeleg(true)).
Since:1.8
/** * Implements the krb5 proxy credential element used in constrained * delegation. It is used in both impersonation (where there is no Kerberos 5 * communication between the middle server and the client) and normal * constrained delegation (where there is, but client has not called * requestCredDeleg(true)). * @since 1.8 */
public class Krb5ProxyCredential implements Krb5CredElement { public final Krb5InitCredential self; // the middle server private final Krb5NameElement client; // the client // The ticket with cname=client and sname=self. This can be a normal // service ticket or an S4U2self ticket. public final Ticket tkt; Krb5ProxyCredential(Krb5InitCredential self, Krb5NameElement client, Ticket tkt) { this.self = self; this.tkt = tkt; this.client = client; } // The client name behind the proxy @Override public final Krb5NameElement getName() throws GSSException { return client; } @Override public int getInitLifetime() throws GSSException { // endTime of tkt is not used by KDC, and it's also not // available in the case of kerberos constr deleg return self.getInitLifetime(); } @Override public int getAcceptLifetime() throws GSSException { return 0; } @Override public boolean isInitiatorCredential() throws GSSException { return true; } @Override public boolean isAcceptorCredential() throws GSSException { return false; } @Override public final Oid getMechanism() { return Krb5MechFactory.GSS_KRB5_MECH_OID; } @Override public final java.security.Provider getProvider() { return Krb5MechFactory.PROVIDER; } @Override public void dispose() throws GSSException { try { self.destroy(); } catch (javax.security.auth.DestroyFailedException e) { GSSException gssException = new GSSException(GSSException.FAILURE, -1, "Could not destroy credentials - " + e.getMessage()); gssException.initCause(e); } } @Override public GSSCredentialSpi impersonate(GSSNameSpi name) throws GSSException { // Cannot impersonate multiple levels without the impersonatee's TGT. throw new GSSException(GSSException.FAILURE, -1, "Only an initiate credentials can impersonate"); } }