PKCS8EncryptedPrivateKeyInfo.java

package org.spongycastle.pkcs;

import java.io.ByteArrayInputStream;
import java.io.IOException;

import org.spongycastle.asn1.pkcs.EncryptedPrivateKeyInfo;
import org.spongycastle.asn1.pkcs.PrivateKeyInfo;
import org.spongycastle.operator.InputDecryptor;
import org.spongycastle.operator.InputDecryptorProvider;
import org.spongycastle.util.io.Streams;

/**
 * Holding class for a PKCS#8 EncryptedPrivateKeyInfo structure.
 */
public class PKCS8EncryptedPrivateKeyInfo
{
    private EncryptedPrivateKeyInfo encryptedPrivateKeyInfo;

    public PKCS8EncryptedPrivateKeyInfo(EncryptedPrivateKeyInfo encryptedPrivateKeyInfo)
    {
        this.encryptedPrivateKeyInfo = encryptedPrivateKeyInfo;
    }

    public EncryptedPrivateKeyInfo toASN1Structure()
    {
         return encryptedPrivateKeyInfo;
    }

    public byte[] getEncoded()
        throws IOException
    {
        return encryptedPrivateKeyInfo.getEncoded();
    }

    public PrivateKeyInfo decryptPrivateKeyInfo(InputDecryptorProvider inputDecryptorProvider)
        throws PKCSException
    {
        InputDecryptor decrytor = inputDecryptorProvider.get(encryptedPrivateKeyInfo.getEncryptionAlgorithm());

        ByteArrayInputStream encIn = new ByteArrayInputStream(encryptedPrivateKeyInfo.getEncryptedData());

        try
        {
            return PrivateKeyInfo.getInstance(Streams.readAll(decrytor.getInputStream(encIn)));
        }
        catch (Exception e)
        {
            throw new PKCSException("unable to read encrypted data: " + e.getMessage(), e);
        }
    }
}