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package org.spongycastle.pkcs;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import org.spongycastle.asn1.pkcs.EncryptedPrivateKeyInfo;
import org.spongycastle.asn1.pkcs.PrivateKeyInfo;
import org.spongycastle.operator.OutputEncryptor;
/**
* A class for creating EncryptedPrivateKeyInfo structures.
* <pre>
* EncryptedPrivateKeyInfo ::= SEQUENCE {
* encryptionAlgorithm AlgorithmIdentifier {{KeyEncryptionAlgorithms}},
* encryptedData EncryptedData
* }
*
* EncryptedData ::= OCTET STRING
*
* KeyEncryptionAlgorithms ALGORITHM-IDENTIFIER ::= {
* ... -- For local profiles
* }
* </pre>
*/
public class PKCS8EncryptedPrivateKeyInfoBuilder
{
private PrivateKeyInfo privateKeyInfo;
public PKCS8EncryptedPrivateKeyInfoBuilder(PrivateKeyInfo privateKeyInfo)
{
this.privateKeyInfo = privateKeyInfo;
}
public PKCS8EncryptedPrivateKeyInfo build(
OutputEncryptor encryptor)
{
try
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
OutputStream cOut = encryptor.getOutputStream(bOut);
cOut.write(privateKeyInfo.getEncoded());
cOut.close();
return new PKCS8EncryptedPrivateKeyInfo(new EncryptedPrivateKeyInfo(encryptor.getAlgorithmIdentifier(), bOut.toByteArray()));
}
catch (IOException e)
{
throw new IllegalStateException("cannot encode privateKeyInfo");
}
}
}
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