com.itextpdf.signatures

Class ProviderDigest

java.lang.Object

com.itextpdf.signatures.ProviderDigest

All Implemented Interfaces:

IExternalDigest

public class ProviderDigest
extends Object
implements IExternalDigest

This class will return the MessageDigest associated with a certain hashing algorithm returned by the specified provider.

Author:

psoares

Constructor Summary

Constructors

Constructor and Description
ProviderDigest(String provider) Creates a ProviderDigest.

Method Summary

Modifier and Type	Method and Description
MessageDigest	getMessageDigest(String hashAlgorithm) Returns the MessageDigest associated with the provided hashing algorithm.

Methods inherited from class java.lang.Object

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

Constructor Detail

ProviderDigest

public ProviderDigest(String provider)

Creates a ProviderDigest.

Parameters:

provider - String name of the provider that you want to use to create the hash

Method Detail

getMessageDigest

public MessageDigest getMessageDigest(String hashAlgorithm)
                               throws GeneralSecurityException

Description copied from interface: IExternalDigest

Returns the MessageDigest associated with the provided hashing algorithm.

Specified by:

getMessageDigest in interface IExternalDigest

Parameters:

hashAlgorithm - String value representing the hashing algorithm

Returns:

MessageDigest MessageDigest object

Throws:

GeneralSecurityException - Thrown when something goes wrong in calculating the digest