Example usage for org.bouncycastle.asn1.cms CompressedData getInstance

Introduction

In this page you can find the example usage for org.bouncycastle.asn1.cms CompressedData getInstance.

Prototype

public static CompressedData getInstance(Object obj) 

Source Link

Document

Return a CompressedData object from the given object.

Usage

From source file:es.gob.afirma.applet.CMSInformation.java

License:Open Source License

/**
 * Obtiene la información de un tipo Compressed Data.
 * @return  Representación de los datos.
 *///w  w  w.ja  v  a 2 s . c o  m
private static String getFromCompressedData(final ASN1TaggedObject doj) {
    String detalle = ""; //$NON-NLS-1$
    detalle = detalle + "Tipo:" + SP + COMPRESSED_DATA + CR; //$NON-NLS-1$
    final CompressedData ed = CompressedData.getInstance(doj.getObject());

    //obtenemos la version
    detalle = detalle + AppletMessages.getString("CMSInformation.1") + SP + ed.getVersion() + CR; //$NON-NLS-1$

    final AlgorithmIdentifier aid = ed.getCompressionAlgorithmIdentifier();
    if (aid.getAlgorithm().toString().equals("1.2.840.113549.1.9.16.3.8")) { //$NON-NLS-1$
        detalle = detalle + "OID del Algoritmo de firma: ZLIB" + CR; //$NON-NLS-1$
    } else {
        detalle = detalle + "OID del Algoritmo de firma:" + SP + aid.getAlgorithm() + CR; //$NON-NLS-1$
    }

    return detalle;
}

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From source file:es.gob.afirma.envelopers.cms.CMSCompressedData.java

License:Open Source License

/** Método que extrae el contenido de un tipo CompressedData.
 * @param data//from w  ww.j  a v a  2  s.  c  om
 *        El tipo CompressedData.
 * @return El contenido del envoltorio.
 * @throws IOException
 *         Se produce cuando hay un error de lectura de datos. */
static byte[] getContentCompressedData(final byte[] data) throws IOException {
    final ASN1Sequence contentEnvelopedData = Utils.fetchWrappedData(data);
    final CompressedData compressed = CompressedData.getInstance(contentEnvelopedData);
    final DEROctetString dos = (DEROctetString) compressed.getEncapContentInfo().getContent();

    return BinaryUtils.uncompress(dos.getOctets());

}

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From source file:es.gob.afirma.envelopers.cms.ValidateCMS.java

License:Open Source License

/** Método que verifica que es una firma de tipo "CompressedData"
 * @param data/*from w  w w .ja  va2  s  .  com*/
 *        Datos CMS.
 * @return si es de este tipo. */
static boolean isCMSCompressedData(final byte[] data) {
    boolean isValid = true;
    try {
        // Leemos el fichero que contiene la firma.
        final ASN1InputStream is = new ASN1InputStream(data);
        // Comenzamos a obtener los datos.
        final ASN1Sequence dsq = (ASN1Sequence) is.readObject();
        is.close();
        final Enumeration<?> e = dsq.getObjects();
        // Elementos que contienen los elementos OID CompressedData.
        final ASN1ObjectIdentifier doi = (ASN1ObjectIdentifier) e.nextElement();
        if (!doi.equals(CMSObjectIdentifiers.compressedData)) {
            isValid = false;
        } else {
            // Contenido de CompressedData
            final ASN1TaggedObject doj = (ASN1TaggedObject) e.nextElement();
            final ASN1Sequence compressedData = (ASN1Sequence) doj.getObject();
            CompressedData.getInstance(compressedData);
        }
    } catch (final Exception ex) {
        isValid = false;
    }
    return isValid;
}

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