Java Security, 2nd Edition

Name

Class java.security.Signature

Synopsis

This engine class provides the ability to create or verify digital signatures by employing different algorithms that have been registered with the Security class. As with all engine classes, instances of this class are obtained via the getInstance( ) method. The signature object must be initialized with the appropriate private key (to sign) or public key (to verify), then data must be fed to the object via the update( ) methods, and then the signature can be obtained (via the sign( ) method) or verified (via the verify( ) method). Signature objects may support algorithm-specific parameters, though this is not a common implementation.

Class Definition

public abstract class java.security.Signature extends java.security.SignatureSpi { // Constants protected static final int SIGN; protected static final int UNINITIALIZED; protected static final int VERIFY; // Variables protected int state; // Constructors protected Signature(String); // Class Methods public static Signature getInstance(String); public static Signature getInstance(String, String); // Instance Methods public Object clone( ); public final String getAlgorithm( ); public final Object getParameter(String); public final Provider getProvider( ); public final void initSign(PrivateKey); public final void initSign(PrivateKey, SecureRandom); public final void initVerify(PublicKey); public final void initVerify(Certificate); public final void setParameter(String, Object); public final void ...