http://www.bouncycastle.org/java.html: The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 to JDK 1.8. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.
  • The Legion of the Bouncy Castle Inc. 
package org.bouncycastle.cms;

import org.bouncycastle.asn1.x509.AlgorithmIdentifier;


Finder which is used to look up the algorithm identifiers representing the encryption algorithms that
are associated with a particular signature algorithm.

/**
 * Finder which is used to look up the algorithm identifiers representing the encryption algorithms that
 * are associated with a particular signature algorithm.
 */
public interface CMSSignatureEncryptionAlgorithmFinder
{
    
Return the encryption algorithm identifier associated with the passed in signatureAlgorithm

Params:
  • signatureAlgorithm – the algorithm identifier of the signature of interest
Returns: the algorithm identifier to be associated with the encryption algorithm used in signature creation.
/**
     * Return the encryption algorithm identifier associated with the passed in signatureAlgorithm
     * @param signatureAlgorithm the algorithm identifier of the signature of interest
     * @return  the algorithm identifier to be associated with the encryption algorithm used in signature creation.
     */
    AlgorithmIdentifier findEncryptionAlgorithm(AlgorithmIdentifier signatureAlgorithm);
}