Package com.itextpdf.signatures

Interface IExternalDigest

All Known Implementing Classes:

BouncyCastleDigest, ProviderDigest

       public interface IExternalDigest
      

ExternalDigest allows the use of implementations of MessageDigest other than BouncyCastleDigest.

Method Summary

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

Method Details

getMessageDigest

             MessageDigest getMessageDigest
             (String hashAlgorithm) throws GeneralSecurityException
            

Returns the MessageDigest associated with the provided hashing algorithm.

Parameters:

hashAlgorithm - String value representing the hashing algorithm

Returns:

MessageDigest MessageDigest object

Throws:

GeneralSecurityException - Thrown when something goes wrong in calculating the digest