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Spongy Castle is a package-rename (org.bouncycastle.* to org.spongycastle.*) of Bouncy Castle intended for Android. Android ships with a stripped-down version of Bouncy Castle - this causes classloader collisions if you try to add an alternative (updated/complete) Bouncy Castle jar. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5.

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package org.spongycastle.cms;

import java.io.IOException;
import java.io.InputStream;

import org.spongycastle.asn1.ASN1SequenceParser;
import org.spongycastle.asn1.ASN1StreamParser;
import org.spongycastle.asn1.cms.ContentInfoParser;

public class CMSContentInfoParser
{
    protected ContentInfoParser _contentInfo;
    protected InputStream       _data;

    protected CMSContentInfoParser(
        InputStream data)
        throws CMSException
    {
        _data = data;
        
        try
        {
            ASN1StreamParser in = new ASN1StreamParser(data);
    
            _contentInfo = new ContentInfoParser((ASN1SequenceParser)in.readObject());
        }
        catch (IOException e)
        {
            throw new CMSException("IOException reading content.", e);
        }
        catch (ClassCastException e)
        {
            throw new CMSException("Unexpected object reading content.", e);
        }
    }
    
    /**
     * Close the underlying data stream.
     * @throws IOException if the close fails.
     */
    public void close() throws IOException
    {
        _data.close();
    }
}