Example usage for org.bouncycastle.asn1.cms EncryptedContentInfo EncryptedContentInfo

Introduction

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

Prototype

public EncryptedContentInfo(ASN1ObjectIdentifier contentType, AlgorithmIdentifier contentEncryptionAlgorithm,
            ASN1OctetString encryptedContent) 

Source Link

Usage

From source file:cljpdf.text.pdf.PdfPublicKeySecurityHandler.java

License:Mozilla Public License

private DERObject createDERForRecipient(byte[] in, X509Certificate cert)
        throws IOException, GeneralSecurityException {

    String s = "1.2.840.113549.3.2";

    AlgorithmParameterGenerator algorithmparametergenerator = AlgorithmParameterGenerator.getInstance(s);
    AlgorithmParameters algorithmparameters = algorithmparametergenerator.generateParameters();
    ByteArrayInputStream bytearrayinputstream = new ByteArrayInputStream(
            algorithmparameters.getEncoded("ASN.1"));
    ASN1InputStream asn1inputstream = new ASN1InputStream(bytearrayinputstream);
    DERObject derobject = asn1inputstream.readObject();
    KeyGenerator keygenerator = KeyGenerator.getInstance(s);
    keygenerator.init(128);//from   w ww. ja  v a  2  s  . c  om
    SecretKey secretkey = keygenerator.generateKey();
    Cipher cipher = Cipher.getInstance(s);
    cipher.init(1, secretkey, algorithmparameters);
    byte[] abyte1 = cipher.doFinal(in);
    DEROctetString deroctetstring = new DEROctetString(abyte1);
    KeyTransRecipientInfo keytransrecipientinfo = computeRecipientInfo(cert, secretkey.getEncoded());
    DERSet derset = new DERSet(new RecipientInfo(keytransrecipientinfo));
    AlgorithmIdentifier algorithmidentifier = new AlgorithmIdentifier(new DERObjectIdentifier(s), derobject);
    EncryptedContentInfo encryptedcontentinfo = new EncryptedContentInfo(PKCSObjectIdentifiers.data,
            algorithmidentifier, deroctetstring);
    EnvelopedData env = new EnvelopedData(null, derset, encryptedcontentinfo, null);
    ContentInfo contentinfo = new ContentInfo(PKCSObjectIdentifiers.envelopedData, env);
    return contentinfo.getDERObject();
}

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From source file:com.itextpdf.kernel.crypto.securityhandler.PubKeySecurityHandler.java

License:Open Source License

private ASN1Primitive createDERForRecipient(byte[] in, X509Certificate cert)
        throws IOException, GeneralSecurityException {
    EncryptionUtils.DERForRecipientParams parameters = EncryptionUtils.calculateDERForRecipientParams(in);

    KeyTransRecipientInfo keytransrecipientinfo = computeRecipientInfo(cert, parameters.abyte0);
    DEROctetString deroctetstring = new DEROctetString(parameters.abyte1);
    DERSet derset = new DERSet(new RecipientInfo(keytransrecipientinfo));
    EncryptedContentInfo encryptedcontentinfo = new EncryptedContentInfo(PKCSObjectIdentifiers.data,
            parameters.algorithmIdentifier, deroctetstring);
    EnvelopedData env = new EnvelopedData(null, derset, encryptedcontentinfo, (ASN1Set) null);
    ContentInfo contentinfo = new ContentInfo(PKCSObjectIdentifiers.envelopedData, env);
    return contentinfo.toASN1Primitive();
}

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From source file:com.itextpdf.text.pdf.PdfPublicKeySecurityHandler.java

License:Open Source License

private ASN1Primitive createDERForRecipient(byte[] in, X509Certificate cert)
        throws IOException, GeneralSecurityException {

    String s = "1.2.840.113549.3.2";

    AlgorithmParameterGenerator algorithmparametergenerator = AlgorithmParameterGenerator.getInstance(s);
    AlgorithmParameters algorithmparameters = algorithmparametergenerator.generateParameters();
    ByteArrayInputStream bytearrayinputstream = new ByteArrayInputStream(
            algorithmparameters.getEncoded("ASN.1"));
    ASN1InputStream asn1inputstream = new ASN1InputStream(bytearrayinputstream);
    ASN1Primitive derobject = asn1inputstream.readObject();
    KeyGenerator keygenerator = KeyGenerator.getInstance(s);
    keygenerator.init(128);//from ww w .  j  a  v a 2s .  c  o m
    SecretKey secretkey = keygenerator.generateKey();
    Cipher cipher = Cipher.getInstance(s);
    cipher.init(1, secretkey, algorithmparameters);
    byte[] abyte1 = cipher.doFinal(in);
    DEROctetString deroctetstring = new DEROctetString(abyte1);
    KeyTransRecipientInfo keytransrecipientinfo = computeRecipientInfo(cert, secretkey.getEncoded());
    DERSet derset = new DERSet(new RecipientInfo(keytransrecipientinfo));
    AlgorithmIdentifier algorithmidentifier = new AlgorithmIdentifier(new ASN1ObjectIdentifier(s), derobject);
    EncryptedContentInfo encryptedcontentinfo = new EncryptedContentInfo(PKCSObjectIdentifiers.data,
            algorithmidentifier, deroctetstring);
    ASN1Set set = null;
    EnvelopedData env = new EnvelopedData(null, derset, encryptedcontentinfo, set);
    ContentInfo contentinfo = new ContentInfo(PKCSObjectIdentifiers.envelopedData, env);
    return contentinfo.toASN1Primitive();
}

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From source file:es.gob.afirma.envelopers.cades.CAdESUtils.java

License:Open Source License

/** Obtiene el contenido de un archivo encriptado
 * @param file Archivo con los datos/* w w  w. j av  a2  s  . c  om*/
 * @param config Configuracion de cifrado
 * @param params Parametros
 * @param cipher Encriptador */
private static EncryptedContentInfo getEncryptedContentInfo(final byte[] file, final AOCipherConfig config,
        final AlgorithmParameterSpec params, final Cipher cipher) throws IOException {
    final byte[] ciphered;
    try {
        ciphered = cipher.doFinal(file);
    } catch (final Exception e) {
        LOGGER.severe("No se ha podido completar el cifrado, se devolvera null: " + e); //$NON-NLS-1$
        return null;
    }

    ASN1Encodable asn1Params;
    if (params != null) {
        final ASN1InputStream aIn = new ASN1InputStream(cipher.getParameters().getEncoded("ASN.1")); //$NON-NLS-1$
        asn1Params = aIn.readObject();
        aIn.close();
    } else {
        asn1Params = new DERNull();
    }

    // obtenemos el OID del algoritmo de cifrado
    final AlgorithmIdentifier encAlgId = new AlgorithmIdentifier(
            new ASN1ObjectIdentifier(config.getAlgorithm().getOid()), asn1Params);

    // Obtenemos el identificador
    final ASN1ObjectIdentifier contentType = PKCSObjectIdentifiers.encryptedData;
    return new EncryptedContentInfo(contentType, encAlgId, new DEROctetString(ciphered));
}

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

License:Open Source License

/** Obtiene el contenido de un archivo encriptado.
 * @param file Archivo con los datos/*from w  ww . ja v a2 s  . c  o  m*/
 * @param config Configuracion de cifrado
 * @param params Parametros
 * @param cipher Encriptador
 * @return Contenido de un archivo encriptado.
 * @throws BadPaddingException Cuando hay problemas con un relleno de datos.
 * @throws IOException Cuando hay problemas con el tratamiento de datos.
 * @throws IllegalBlockSizeException Cuando hay problemas internos con los tamaños de bloque de cifrado. */
private static EncryptedContentInfo getEncryptedContentInfo(final byte[] file, final AOCipherConfig config,
        final AlgorithmParameterSpec params, final Cipher cipher)
        throws IOException, IllegalBlockSizeException, BadPaddingException {

    ASN1Encodable asn1Params;
    if (params != null) {
        final ASN1InputStream aIn = new ASN1InputStream(cipher.getParameters().getEncoded("ASN.1")); //$NON-NLS-1$
        asn1Params = aIn.readObject();
        aIn.close();
    } else {
        asn1Params = DERNull.INSTANCE;
    }

    // obtenemos el OID del algoritmo de cifrado
    final AlgorithmIdentifier encAlgId = new AlgorithmIdentifier(
            new ASN1ObjectIdentifier(config.getAlgorithm().getOid()), asn1Params);

    // Obtenemos el identificador
    final ASN1ObjectIdentifier contentType = PKCSObjectIdentifiers.encryptedData;
    return new EncryptedContentInfo(contentType, encAlgId, new DEROctetString(cipher.doFinal(file)));
}

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