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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. The APIs are designed primarily to be used in conjunction with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified.

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package org.bouncycastle.openssl;

import java.io.IOException;

import org.bouncycastle.operator.OperatorCreationException;

public class PEMEncryptedKeyPair
{
    private final String dekAlgName;
    private final byte[] iv;
    private final byte[] keyBytes;
    private final PEMKeyPairParser parser;

    PEMEncryptedKeyPair(String dekAlgName, byte[] iv, byte[] keyBytes, PEMKeyPairParser parser)
    {
        this.dekAlgName = dekAlgName;
        this.iv = iv;
        this.keyBytes = keyBytes;
        this.parser = parser;
    }

    public PEMKeyPair decryptKeyPair(PEMDecryptorProvider keyDecryptorProvider)
        throws IOException
    {
        try
        {
            PEMDecryptor keyDecryptor = keyDecryptorProvider.get(dekAlgName);

            return parser.parse(keyDecryptor.decrypt(keyBytes, iv));
        }
        catch (IOException e)
        {
            throw e;
        }
        catch (OperatorCreationException e)
        {
            throw new PEMException("cannot create extraction operator: " + e.getMessage(), e);
        }
        catch (Exception e)
        {
            throw new PEMException("exception processing key pair: " + e.getMessage(), e);
        }
    }
}