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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.4. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.

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package org.bouncycastle.cms;

import java.security.AlgorithmParameters;
import java.security.InvalidAlgorithmParameterException;
import java.security.spec.InvalidParameterSpecException;

import javax.crypto.interfaces.PBEKey;
import javax.crypto.spec.PBEParameterSpec;

public abstract class CMSPBEKey
    implements PBEKey
{
    private char[] password;
    private byte[] salt;
    private int    iterationCount;

    protected static PBEParameterSpec getParamSpec(AlgorithmParameters algParams)
        throws InvalidAlgorithmParameterException
    {
        try
        {
            return (PBEParameterSpec)algParams.getParameterSpec(PBEParameterSpec.class);
        }
        catch (InvalidParameterSpecException e)
        {
            throw new InvalidAlgorithmParameterException("cannot process PBE spec: " + e.getMessage());
        }
    }

    public CMSPBEKey(char[] password, byte[] salt, int iterationCount)
    {
        this.password = password;
        this.salt = salt;
        this.iterationCount = iterationCount;
    }

    public CMSPBEKey(char[] password, PBEParameterSpec pbeSpec)
    {
        this(password, pbeSpec.getSalt(), pbeSpec.getIterationCount());
    }
    
    public char[] getPassword()
    {
        return password;
    }

    public byte[] getSalt()
    {
        return salt;
    }

    public int getIterationCount()
    {
        return iterationCount;
    }

    public String getAlgorithm()
    {
        return "PKCS5S2";
    }

    public String getFormat()
    {
        return "RAW";
    }

    public byte[] getEncoded()
    {
        return null;
    }

    abstract byte[] getEncoded(String algorithmOid);
}