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.

Field Summary

Fields

Modifier and Type	Field	Description
private String	provider

Constructor Summary

Constructors

Constructor	Description
ProviderDigest(String provider)	Creates a ProviderDigest.

Method Summary

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

Methods inherited from class Object

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

Field Details

provider

private String provider

Constructor Details

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 Details

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