org.bouncycastle.cms.CMSEncryptedData Maven / Gradle / Ivy
package org.bouncycastle.cms;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import org.bouncycastle.asn1.cms.ContentInfo;
import org.bouncycastle.asn1.cms.EncryptedContentInfo;
import org.bouncycastle.asn1.cms.EncryptedData;
import org.bouncycastle.operator.InputDecryptor;
import org.bouncycastle.operator.InputDecryptorProvider;
public class CMSEncryptedData
{
private ContentInfo contentInfo;
private EncryptedData encryptedData;
public CMSEncryptedData(ContentInfo contentInfo)
{
this.contentInfo = contentInfo;
this.encryptedData = EncryptedData.getInstance(contentInfo.getContent());
}
public byte[] getContent(InputDecryptorProvider inputDecryptorProvider)
throws CMSException
{
try
{
return CMSUtils.streamToByteArray(getContentStream(inputDecryptorProvider).getContentStream());
}
catch (IOException e)
{
throw new CMSException("unable to parse internal stream: " + e.getMessage(), e);
}
}
public CMSTypedStream getContentStream(InputDecryptorProvider inputDecryptorProvider)
throws CMSException
{
try
{
EncryptedContentInfo encContentInfo = encryptedData.getEncryptedContentInfo();
InputDecryptor decrytor = inputDecryptorProvider.get(encContentInfo.getContentEncryptionAlgorithm());
ByteArrayInputStream encIn = new ByteArrayInputStream(encContentInfo.getEncryptedContent().getOctets());
return new CMSTypedStream(encContentInfo.getContentType(), decrytor.getInputStream(encIn));
}
catch (Exception e)
{
throw new CMSException("unable to create stream: " + e.getMessage(), e);
}
}
/**
* return the ContentInfo
*/
public ContentInfo toASN1Structure()
{
return contentInfo;
}
}