Example usage for org.bouncycastle.crypto.engines RSAEngine processBlock

Introduction

In this page you can find the example usage for org.bouncycastle.crypto.engines RSAEngine processBlock.

Prototype

public byte[] processBlock(byte[] in, int inOff, int inLen) 

Source Link

Document

Process a single block using the basic RSA algorithm.

Usage

From source file:org.fnppl.opensdx.security.PrivateKey.java

License:Open Source License

public byte[] sign(byte[] data) throws Exception {
    RSAEngine rsae = new RSAEngine();
    rsae.init(false, priv);//from  w  ww  .j  a  va  2  s.  c  o  m
    byte[] filleddata = new byte[rsae.getInputBlockSize() - 1];
    for (int i = 0; i < filleddata.length; i++) {
        filleddata[i] = data[i % data.length];//HT 2011-03-03 better some initvectorpadddup!!!
    }

    //System.out.println("PrivKey_SIGN_PLAINBLOATED:\t"+SecurityHelper.HexDecoder.encode(filleddata, ':', 80));

    return rsae.processBlock(filleddata, 0, filleddata.length);
}

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From source file:org.fnppl.opensdx.security.PublicKey.java

License:Open Source License

public byte[] encryptPKCSed7(byte[] data) throws Exception {
    //input here is a full rsa-block...
    RSAEngine rsae = new RSAEngine();
    //      org.bouncycastle.crypto.encodings.PKCS1Encoding enc = new PKCS1Encoding(rsae);
    //      enc.init(true, pub);
    //       return enc.processBlock(data, 0, data.length);

    rsae.init(true, pub);/* w ww  .ja v a 2s  . c  o m*/
    //      System.out.println("pub.encryptpkcs7.outputLength: "+rsae.getOutputBlockSize());
    //      System.out.println("pub.encryptpkcs7.inputBlockSize: "+rsae.getInputBlockSize());

    //      PKCS7Padding pad = new PKCS7Padding();
    //      byte[] kk = new byte[rsae.getInputBlockSize()];
    //      System.arraycopy(data, 0, kk, 0, data.length);
    //      pad.addPadding(kk, data.length);

    //      return rsae.processBlock(kk, 0, kk.length);

    return rsae.processBlock(data, 0, data.length);

    //      OAEPEncoding oaep = new OAEPEncoding(rsae);
    //      oaep.init(
    //            false, //fr encrypt: true
    ////            bp
    //            priv
    //         );
    //      if(data.length > rsae.getInputBlockSize()) {
    //         throw new RuntimeException("PrivateKey.encrypt::data.length("+data.length+") too long - max is: "+rsae.getInputBlockSize());
    //      }
    //      
    //      return oaep.processBlock(data, 0, data.length);
}

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From source file:org.silvertunnel.netlib.layer.tor.util.Encryption.java

License:Open Source License

/**
 * checks row signature/*from w w  w . ja  v a 2 s . c  om*/
 * 
 * @param signature
 *            signature to check
 * @param signingKey
 *            public key from signing
 * @param input
 *            byte array, signature is made over
 * 
 * @return true, if the signature is correct
 * 
 */
public static boolean verifySignatureXXXX(byte[] signature, RSAPublicKeyStructure signingKey, byte[] input) {

    byte[] hash = getDigest(input);
    try {
        Signature sig = Signature.getInstance("SHA1withRSA");
        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        RSAPublicKeySpec keySpec = new RSAPublicKeySpec(signingKey.getModulus(),
                signingKey.getPublicExponent());
        PublicKey pubKey = keyFactory.generatePublic(keySpec);
        sig.initVerify(pubKey);
        sig.update(input);
        log.info("");
        log.info(" HERE -> " + sig.verify(signature));

        RSAKeyParameters myRSAKeyParameters = new RSAKeyParameters(false, signingKey.getModulus(),
                signingKey.getPublicExponent());
        RSAEngine rsaAlg = new RSAEngine();
        rsaAlg.init(false, myRSAKeyParameters);
        byte[] decryptedSignature = rsaAlg.processBlock(signature, 0, signature.length);
        log.info(" inpu = " + Encoding.toHexString(input));
        log.info(" hash = " + Encoding.toHexString(hash));
        log.info("");
        log.info(" sign = " + Encoding.toHexString(signature));
        log.info(" decr = " + Encoding.toHexString(decryptedSignature));

        return Encoding.arraysEqual(hash, decryptedSignature);

    } catch (Exception e) {
        log.log(Level.WARNING, "unexpected", e);
        return false;
    }
}

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From source file:TorJava.Common.Encryption.java

License:Open Source License

/**
 * checks row signature/*from www  .j  a v  a  2 s .c om*/
 * 
 * @param signature
 *            signature to check
 * @param signingKey
 *            public key from signing
 * @param input
 *            byte array, signature is made over
 * 
 * @return true, if the signature is correct
 * 
 */
public static boolean verifySignatureXXXX(byte[] signature, RSAPublicKeyStructure signingKey, byte[] input) {

    byte[] hash = getHash(input);
    try {
        Signature sig = Signature.getInstance("SHA1withRSA");
        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        RSAPublicKeySpec keySpec = new RSAPublicKeySpec(signingKey.getModulus(),
                signingKey.getPublicExponent());
        PublicKey pubKey = keyFactory.generatePublic(keySpec);
        sig.initVerify(pubKey);
        sig.update(input);
        System.out.println("");
        System.out.println(" HERE -> " + sig.verify(signature));

        RSAKeyParameters myRSAKeyParameters = new RSAKeyParameters(false, signingKey.getModulus(),
                signingKey.getPublicExponent());
        RSAEngine rsa_alg = new RSAEngine();
        rsa_alg.init(false, myRSAKeyParameters);
        byte[] decrypted_signature = rsa_alg.processBlock(signature, 0, signature.length);
        System.out.println(" inpu = " + Encoding.toHexString(input));
        System.out.println(" hash = " + Encoding.toHexString(hash));
        System.out.println("");
        System.out.println(" sign = " + Encoding.toHexString(signature));
        System.out.println(" decr = " + Encoding.toHexString(decrypted_signature));

        return Encoding.arraysEqual(hash, decrypted_signature);

    } catch (Exception e) {
        e.printStackTrace();
    }

    return false;

}

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