Example usage for java.security AlgorithmParameters getEncoded

Introduction

In this page you can find the example usage for java.security AlgorithmParameters getEncoded.

Prototype

public final byte[] getEncoded(String format) throws IOException 

Source Link

Document

Returns the parameters encoded in the specified scheme.

Usage

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());

    Signature signature = Signature.getInstance("SHA1withRSAandMGF1", "BC");
    signature.setParameter(PSSParameterSpec.DEFAULT);

    AlgorithmParameters params = signature.getParameters();

    ASN1InputStream aIn = new ASN1InputStream(params.getEncoded("ASN.1"));

    System.out.println(ASN1Dump.dumpAsString(aIn.readObject()));
}

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From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());

    AlgorithmParameters params = AlgorithmParameters.getInstance("AES", "BC");
    IvParameterSpec ivSpec = new IvParameterSpec(new byte[16]);
    params.init(ivSpec);/*from   ww  w  .  ja va2 s  . c o m*/
    ASN1InputStream aIn = new ASN1InputStream(params.getEncoded("ASN.1"));

    System.out.println(ASN1Dump.dumpAsString(aIn.readObject()));
}

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From source file:org.apache.pdfbox.pdmodel.encryption.PublicKeySecurityHandler.java

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 w w. j a  v  a2  s  .  co 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 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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