Example usage for org.bouncycastle.crypto.engines RSABlindedEngine RSABlindedEngine

List of usage examples for org.bouncycastle.crypto.engines RSABlindedEngine RSABlindedEngine

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Introduction

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

Prototype

RSABlindedEngine

Source Link

Usage

From source file:bluecrystal.service.service.SignVerifyService.java

License:Open Source License

public boolean verify(int hashId, byte[] contentHash, byte[] sigBytes, X509Certificate cert) throws Exception {
    RSAPublicKey pubK = (RSAPublicKey) cert.getPublicKey();
    CipherParameters param = new RSAKeyParameters(false, pubK.getModulus(), pubK.getPublicExponent());
    RSABlindedEngine cipher2 = new RSABlindedEngine();
    cipher2.init(false, param);//from   w w  w.  ja va  2 s . c  o  m
    AsymmetricBlockCipher cipher = new PKCS1Encoding(cipher2);
    byte[] sig = cipher.processBlock(sigBytes, 0, sigBytes.length);
    AlgorithmIdentifier algId = createAlgorithm(hashId);
    byte[] expected = derEncode(contentHash, algId);

    LOG.debug("Sig:(" + sigBytes.length + ")" + Utils.conv(sigBytes));
    LOG.debug("Has:(" + contentHash.length + ")" + Utils.conv(contentHash));
    LOG.debug("Sig:(" + sig.length + ")" + Utils.conv(sig));
    LOG.debug("Exp:(" + expected.length + ")" + Utils.conv(expected));

    if (sig.length == expected.length) {
        for (int i = 0; i < sig.length; i++) {
            if (sig[i] != expected[i]) {
                return false;
            }
        }
    } else if (sig.length == expected.length - 2) // NULL left out
    {
        int sigOffset = sig.length - contentHash.length - 2;
        int expectedOffset = expected.length - contentHash.length - 2;

        expected[1] -= 2; // adjust lengths
        expected[3] -= 2;

        for (int i = 0; i < contentHash.length; i++) {
            if (sig[sigOffset + i] != expected[expectedOffset + i]) // check hash
            {
                return false;
            }
        }

        for (int i = 0; i < sigOffset; i++) {
            if (sig[i] != expected[i]) // check header less NULL
            {
                return false;
            }
        }
    } else {
        return false;
    }

    return true;

}

From source file:com.geoxp.oss.CryptoHelper.java

License:Apache License

/**
 * Encrypt data using RSA.//from   w w w.  java  2  s.com
 * CAUTION: this can take a while on large data
 * 
 * @param key RSA key to use for encryption
 * @param data Cleartext data
 * @return The ciphertext data or null if an error occured
 */
public static byte[] encryptRSA(Key key, byte[] data) {
    //
    // Get an RSA Cipher instance
    //
    //Cipher rsa = null;

    try {
        /* The following commented code can be used the BouncyCastle
         * JCE provider signature is intact, which is not the
         * case when BC has been repackaged using jarjar
        rsa = Cipher.getInstance("RSA/ECB/PKCS1Padding", "BC");
        rsa.init (Cipher.ENCRYPT_MODE, key, CryptoHelper.sr);                   
        return rsa.doFinal(data);
        */
        AsymmetricBlockCipher c = new PKCS1Encoding(new RSABlindedEngine());
        if (key instanceof RSAPublicKey) {
            c.init(true, new RSAKeyParameters(true, ((RSAPublicKey) key).getModulus(),
                    ((RSAPublicKey) key).getPublicExponent()));
        } else if (key instanceof RSAPrivateKey) {
            c.init(true, new RSAKeyParameters(true, ((RSAPrivateKey) key).getModulus(),
                    ((RSAPrivateKey) key).getPrivateExponent()));
        } else {
            return null;
        }

        int insize = c.getInputBlockSize();

        int offset = 0;

        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        while (offset < data.length) {
            int len = Math.min(insize, data.length - offset);
            baos.write(c.processBlock(data, offset, len));
            offset += len;
        }

        return baos.toByteArray();

        /*
            } catch (NoSuchProviderException nspe) {
              return null;
            } catch (NoSuchPaddingException nspe) {
              return null;
            } catch (NoSuchAlgorithmException nsae) {
              return null;
            } catch (InvalidKeyException ike) {
              return null;
            } catch (BadPaddingException bpe) {
              return null;
            } catch (IllegalBlockSizeException ibse) {
              return null;
            }
        */
    } catch (InvalidCipherTextException icte) {
        return null;
    } catch (IOException ioe) {
        return null;
    }
}

From source file:com.geoxp.oss.CryptoHelper.java

License:Apache License

/**
 * Decrypt data previously encrypted with RSA
 * @param key RSA key to use for decryption
 * @param data Ciphertext data/*from   w  w w.j  av  a  2 s.c o m*/
 * @return The cleartext data or null if an error occurred
 */
public static byte[] decryptRSA(Key key, byte[] data) {
    //
    // Get an RSA Cipher instance
    //

    //Cipher rsa = null;

    try {
        /* The following commented code can be used the BouncyCastle
         * JCE provider signature is intact, which is not the
         * case when BC has been repackaged using jarjar
        rsa = Cipher.getInstance("RSA/ECB/PKCS1Padding", "BC");
        rsa.init (Cipher.DECRYPT_MODE, key, CryptoHelper.sr);
        return rsa.doFinal(data);
        */

        AsymmetricBlockCipher c = new PKCS1Encoding(new RSABlindedEngine());
        if (key instanceof RSAPublicKey) {
            c.init(false, new RSAKeyParameters(true, ((RSAPublicKey) key).getModulus(),
                    ((RSAPublicKey) key).getPublicExponent()));
        } else if (key instanceof RSAPrivateKey) {
            c.init(false, new RSAKeyParameters(true, ((RSAPrivateKey) key).getModulus(),
                    ((RSAPrivateKey) key).getPrivateExponent()));
        } else {
            return null;
        }

        int insize = c.getInputBlockSize();

        int offset = 0;

        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        while (offset < data.length) {
            int len = Math.min(insize, data.length - offset);
            baos.write(c.processBlock(data, offset, len));
            offset += len;
        }

        return baos.toByteArray();

        /*
            } catch (NoSuchProviderException nspe) {
              return null;
            } catch (NoSuchPaddingException nspe) {
              return null;
            } catch (NoSuchAlgorithmException nsae) {
              return null;
            } catch (InvalidKeyException ike) {
              return null;
            } catch (BadPaddingException bpe) {
              return null;
            } catch (IllegalBlockSizeException ibse) {
              return null;
            }
        */
    } catch (InvalidCipherTextException icte) {
        return null;
    } catch (IOException ioe) {
        return null;
    }
}

From source file:com.github.chuckbuckethead.cypher.keys.RSAKey.java

License:Open Source License

/**
 * @return an RSA decryption cipher//from w ww  .  j  av a 2  s.  c  o  m
 */
protected synchronized AsymmetricBlockCipher getRSADecryptCipher() {
    if (decodeCipher == null) {
        try {
            byte[] bytes = getEncoder().decode(privateKey);
            EncodedKeySpec privateKeySpec = new PKCS8EncodedKeySpec(bytes);

            KeyFactory keyFactory = KeyFactory.getInstance(RSA_ALGORITHM);
            PrivateKey key = keyFactory.generatePrivate(privateKeySpec);

            this.decodeCipher = new PKCS1Encoding(new RSABlindedEngine());
            decodeCipher.init(false, generatePrivateKeyParameter((RSAPrivateKey) key));
        } catch (Exception e) {
            throw new RuntimeException("Error constructing Cipher: ", e);
        }
    }

    return decodeCipher;
}

From source file:com.github.chuckbuckethead.cypher.keys.RSAKey.java

License:Open Source License

/**
 * @return//from   www. ja va2 s .  com
 */
protected synchronized AsymmetricBlockCipher getRSAEncryptCipher() {
    if (encodeCipher == null) {
        try {
            byte[] bytes = getEncoder().decode(publicKey);
            EncodedKeySpec publicKeySpec = new X509EncodedKeySpec(bytes);

            KeyFactory keyFactory = KeyFactory.getInstance(RSA_ALGORITHM);
            PublicKey key = keyFactory.generatePublic(publicKeySpec);

            this.encodeCipher = new PKCS1Encoding(new RSABlindedEngine());
            encodeCipher.init(true, generatePublicKeyParameter((RSAPublicKey) key));
        } catch (Exception e) {
            throw new RuntimeException("Error constructing Cipher: ", e);
        }
    }

    return encodeCipher;
}

From source file:edu.biu.scapi.midLayer.asymmetricCrypto.digitalSignature.BcRSAPss.java

License:Open Source License

private void createBCSigner(String hashName, SecureRandom random) throws FactoriesException {
    //Creates BC digest with the given name.
    digest = BCFactory.getInstance().getDigest(hashName);

    this.random = random;

    RSABlindedEngine rsa = new RSABlindedEngine();
    signer = new PSSSigner(rsa, digest, digest.getDigestSize());
}

From source file:edu.biu.scapi.midLayer.asymmetricCrypto.encryption.BcRSAOaep.java

License:Open Source License

/**
 * Constructor that lets the user choose the source of randomness.
 * @param random source of randomness.//  w  w w .  j  a  va 2 s.com
 */
public BcRSAOaep(SecureRandom random) {
    this.random = random;
    //Creates the OAEP encoding with RSABlindedEngine of BC.
    this.bcBlockCipher = new OAEPEncoding(new RSABlindedEngine());

}

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

License:Open Source License

public byte[] decrypt(byte[] data) throws Exception {
    RSABlindedEngine rsae = new RSABlindedEngine();

    OAEPEncoding oaep = new OAEPEncoding(rsae);
    oaep.init(false, //fr encrypt: true
            //            bp
            priv);/*from  w ww.  j a v  a  2s . c  om*/
    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);
}

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

License:Open Source License

public byte[] encrypt(byte[] data) throws Exception {
    RSABlindedEngine rsae = new RSABlindedEngine();

    //      RSABlindingEngine rsae = new RSABlindingEngine();
    //      //from www .j  a  va 2 s.co  m
    //      RSABlindingParameters bp = new RSABlindingParameters(
    //            priv, 
    //            PublicKey.generateBlindingFactor(pubkey)
    //         );

    OAEPEncoding oaep = new OAEPEncoding(rsae);
    oaep.init(true, //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);
}

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

License:Open Source License

public byte[] encrypt(byte[] data) throws Exception {
    //      RSABlindingEngine rsae = new RSABlindingEngine();
    RSABlindedEngine rsab = new RSABlindedEngine();

    //      RSABlindingParameters bp = new RSABlindingParameters(
    //            pub, 
    //            generateBlindingFactor(pub)
    //         );

    //      OAEPEncoding oaep = new OAEPEncoding(rsae);
    OAEPEncoding oaep = new OAEPEncoding(rsab);
    oaep.init(true, //fr encrypt: true
            pub//from  w  w  w  . java  2  s. c om
    //            bp
    );

    if (data.length > rsab.getInputBlockSize()) {
        throw new RuntimeException("PublicKey.encrypt::data.length(" + data.length + ") too long - max is: "
                + oaep.getInputBlockSize());
    }

    return oaep.processBlock(data, 0, data.length);
}