com.itextpdf.signatures

Class PrivateKeySignature

java.lang.Object

com.itextpdf.signatures.PrivateKeySignature

All Implemented Interfaces:

IExternalSignature

public class PrivateKeySignature
extends Object
implements IExternalSignature

Implementation of the IExternalSignature interface that can be used when you have a PrivateKey object.

Author:

Paulo Soares

Constructor Summary

Constructors

Constructor and Description
PrivateKeySignature(PrivateKey pk, String hashAlgorithm, String provider) Creates a PrivateKeySignature instance.

Method Summary

Modifier and Type	Method and Description
String	getEncryptionAlgorithm() Returns the encryption algorithm used for signing.
String	getHashAlgorithm() Returns the hash algorithm.
byte[]	sign(byte[] message) Signs the given message using the encryption algorithm in combination with the hash algorithm.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PrivateKeySignature

public PrivateKeySignature(PrivateKey pk,
                           String hashAlgorithm,
                           String provider)

Creates a PrivateKeySignature instance.

Parameters:

pk - A PrivateKey object.

hashAlgorithm - A hash algorithm (e.g. "SHA-1", "SHA-256",...).

provider - A security provider (e.g. "BC").

Method Detail

getHashAlgorithm

public String getHashAlgorithm()

Returns the hash algorithm.

Specified by:

getHashAlgorithm in interface IExternalSignature

Returns:

The hash algorithm (e.g. "SHA-1", "SHA-256,...").

getEncryptionAlgorithm

public String getEncryptionAlgorithm()

Returns the encryption algorithm used for signing.

Specified by:

getEncryptionAlgorithm in interface IExternalSignature

Returns:

The encryption algorithm ("RSA" or "DSA").

sign

public byte[] sign(byte[] message)
            throws GeneralSecurityException

Signs the given message using the encryption algorithm in combination with the hash algorithm.

Specified by:

sign in interface IExternalSignature

Parameters:

message - The message you want to be hashed and signed.

Returns:

A signed message digest.

Throws:

GeneralSecurityException