Examples with KeyGenerator javax.crypto.KeyGenerator used on opensource projects

Example 61 with KeyGenerator

use of javax.crypto.KeyGenerator in project jdk8u_jdk by JetBrains.

the class TestSameBuffer method runTest.

public void runTest(String algo, String mo, String pad) throws Exception {
    Cipher ci = null;
    byte[] iv = null;
    AlgorithmParameterSpec aps = null;
    SecretKey key = null;
    try {
        // Initialization
        Random rdm = new Random();
        byte[] plainText = new byte[128];
        rdm.nextBytes(plainText);
        // keep the plain text
        byte[] tmpText = new byte[plainText.length];
        for (int i = 0; i < plainText.length; i++) {
            tmpText[i] = plainText[i];
        }
        ci = Cipher.getInstance(algo + "/" + mo + "/" + pad, PROVIDER);
        KeyGenerator kg = KeyGenerator.getInstance(algo, PROVIDER);
        kg.init(KEY_LENGTH);
        key = kg.generateKey();
        // encrypt
        ci.init(Cipher.ENCRYPT_MODE, key);
        int offset = ci.update(plainText, 0, plainText.length, plainText, 0);
        ci.doFinal(plainText, offset);
        if (!mo.equalsIgnoreCase("ECB")) {
            iv = ci.getIV();
            aps = new IvParameterSpec(iv);
        } else {
            aps = null;
        }
        ci.init(Cipher.DECRYPT_MODE, key, aps);
        byte[] recoveredText = new byte[ci.getOutputSize(plainText.length)];
        ci.doFinal(plainText, 0, plainText.length, recoveredText);
        // Comparison
        if (!java.util.Arrays.equals(tmpText, recoveredText)) {
            System.out.println("Original: ");
            dumpBytes(plainText);
            System.out.println("Recovered: ");
            dumpBytes(recoveredText);
            throw new RuntimeException("Original text is not equal with recovered text, with mode:" + mo);
        }
    } catch (NoSuchAlgorithmException e) {
        //CFB7 and CFB150 are for negative testing
        if (!mo.equalsIgnoreCase("CFB7") && !mo.equalsIgnoreCase("CFB150")) {
            System.out.println("Unexpected NoSuchAlgorithmException with mode: " + mo);
            throw new RuntimeException("Test failed!");
        }
    } catch (NoSuchProviderException | NoSuchPaddingException | InvalidKeyException | InvalidAlgorithmParameterException | ShortBufferException | IllegalBlockSizeException | BadPaddingException e) {
        System.out.println("Test failed!");
        throw e;
    }
}

Example 62 with KeyGenerator

use of javax.crypto.KeyGenerator in project jdk8u_jdk by JetBrains.

the class Padding method runTest.

public void runTest(String algo, String mo, String pad) throws Exception {
    Cipher ci = null;
    byte[] iv = null;
    AlgorithmParameterSpec aps = null;
    SecretKey key = null;
    try {
        Random rdm = new Random();
        byte[] plainText;
        ci = Cipher.getInstance(algo + "/" + mo + "/" + pad, PROVIDER);
        KeyGenerator kg = KeyGenerator.getInstance(algo, PROVIDER);
        kg.init(KEY_LENGTH);
        key = kg.generateKey();
        for (int i = 0; i < 15; i++) {
            plainText = new byte[1600 + i + 1];
            rdm.nextBytes(plainText);
            if (!mo.equalsIgnoreCase("GCM")) {
                ci.init(Cipher.ENCRYPT_MODE, key, aps);
            } else {
                ci.init(Cipher.ENCRYPT_MODE, key);
            }
            byte[] cipherText = new byte[ci.getOutputSize(plainText.length)];
            int offset = ci.update(plainText, 0, plainText.length, cipherText, 0);
            ci.doFinal(cipherText, offset);
            if (!mo.equalsIgnoreCase("ECB")) {
                iv = ci.getIV();
                aps = new IvParameterSpec(iv);
            } else {
                aps = null;
            }
            if (!mo.equalsIgnoreCase("GCM")) {
                ci.init(Cipher.DECRYPT_MODE, key, aps);
            } else {
                ci.init(Cipher.DECRYPT_MODE, key, ci.getParameters());
            }
            byte[] recoveredText = new byte[ci.getOutputSize(cipherText.length)];
            int len = ci.doFinal(cipherText, 0, cipherText.length, recoveredText);
            byte[] tmp = new byte[len];
            for (int j = 0; j < len; j++) {
                tmp[j] = recoveredText[j];
            }
            if (!java.util.Arrays.equals(plainText, tmp)) {
                System.out.println("Original: ");
                dumpBytes(plainText);
                System.out.println("Recovered: ");
                dumpBytes(tmp);
                throw new RuntimeException("Original text is not equal with recovered text, with mode:" + mo);
            }
        }
    } catch (NoSuchAlgorithmException e) {
        //CFB7 and OFB150 are for negative testing
        if (!mo.equalsIgnoreCase("CFB7") && !mo.equalsIgnoreCase("OFB150")) {
            System.out.println("Unexpected NoSuchAlgorithmException with mode: " + mo);
            throw new RuntimeException("Test failed!");
        }
    } catch (NoSuchProviderException | NoSuchPaddingException | InvalidKeyException | InvalidAlgorithmParameterException | ShortBufferException | IllegalBlockSizeException | BadPaddingException e) {
        System.out.println("Test failed!");
        throw e;
    }
}

Example 63 with KeyGenerator

use of javax.crypto.KeyGenerator in project jdk8u_jdk by JetBrains.

the class TestAESCipher method runTest.

public void runTest(String algo, String mo, String pad) throws Exception {
    Cipher ci = null;
    byte[] iv = null;
    AlgorithmParameterSpec aps = null;
    SecretKey key = null;
    try {
        // Initialization
        Random rdm = new Random();
        byte[] plainText = new byte[128];
        rdm.nextBytes(plainText);
        ci = Cipher.getInstance(algo + "/" + mo + "/" + pad, PROVIDER);
        KeyGenerator kg = KeyGenerator.getInstance(algo, PROVIDER);
        kg.init(KEY_LENGTH);
        key = kg.generateKey();
        // encrypt
        if (!mo.equalsIgnoreCase("GCM")) {
            ci.init(Cipher.ENCRYPT_MODE, key, aps);
        } else {
            ci.init(Cipher.ENCRYPT_MODE, key);
        }
        byte[] cipherText = new byte[ci.getOutputSize(plainText.length)];
        int offset = ci.update(plainText, 0, plainText.length, cipherText, 0);
        ci.doFinal(cipherText, offset);
        if (!mo.equalsIgnoreCase("ECB")) {
            iv = ci.getIV();
            aps = new IvParameterSpec(iv);
        } else {
            aps = null;
        }
        if (!mo.equalsIgnoreCase("GCM")) {
            ci.init(Cipher.DECRYPT_MODE, key, aps);
        } else {
            ci.init(Cipher.DECRYPT_MODE, key, ci.getParameters());
        }
        byte[] recoveredText = new byte[ci.getOutputSize(cipherText.length)];
        int len = ci.doFinal(cipherText, 0, cipherText.length, recoveredText);
        byte[] tmp = new byte[len];
        System.arraycopy(recoveredText, 0, tmp, 0, len);
        // Comparison
        if (!java.util.Arrays.equals(plainText, tmp)) {
            System.out.println("Original: ");
            dumpBytes(plainText);
            System.out.println("Recovered: ");
            dumpBytes(tmp);
            throw new RuntimeException("Original text is not equal with recovered text, with mode:" + mo);
        }
    } catch (NoSuchAlgorithmException e) {
        //CFB7 and OFB150 are for negative testing
        if (!mo.equalsIgnoreCase("CFB7") && !mo.equalsIgnoreCase("OFB150")) {
            System.out.println("Unexpected NoSuchAlgorithmException with mode: " + mo);
            throw new RuntimeException("Test failed!");
        }
    } catch (NoSuchProviderException | NoSuchPaddingException | InvalidKeyException | InvalidAlgorithmParameterException | ShortBufferException | IllegalBlockSizeException | BadPaddingException e) {
        System.out.println("Test failed!");
        throw e;
    }
}

Example 64 with KeyGenerator

use of javax.crypto.KeyGenerator in project android_frameworks_base by crdroidandroid.

the class SystemKeyStore method generateNewKey.

public byte[] generateNewKey(int numBits, String algName, String keyName) throws NoSuchAlgorithmException {
    // Check if key with similar name exists. If so, return null.
    File keyFile = getKeyFile(keyName);
    if (keyFile.exists()) {
        throw new IllegalArgumentException();
    }
    KeyGenerator skg = KeyGenerator.getInstance(algName);
    SecureRandom srng = SecureRandom.getInstance("SHA1PRNG");
    skg.init(numBits, srng);
    SecretKey sk = skg.generateKey();
    byte[] retKey = sk.getEncoded();
    try {
        // Store the key
        if (!keyFile.createNewFile()) {
            throw new IllegalArgumentException();
        }
        FileOutputStream fos = new FileOutputStream(keyFile);
        fos.write(retKey);
        fos.flush();
        FileUtils.sync(fos);
        fos.close();
        FileUtils.setPermissions(keyFile.getName(), (FileUtils.S_IRUSR | FileUtils.S_IWUSR), -1, -1);
    } catch (IOException ioe) {
        return null;
    }
    return retKey;
}

Example 65 with KeyGenerator

use of javax.crypto.KeyGenerator in project bitsquare by bitsquare.

the class Encryption method generateSecretKey.

///////////////////////////////////////////////////////////////////////////////////////////
// Private
///////////////////////////////////////////////////////////////////////////////////////////
private static SecretKey generateSecretKey() {
    try {
        KeyGenerator keyPairGenerator = KeyGenerator.getInstance(SYM_KEY_ALGO, "BC");
        keyPairGenerator.init(256);
        return keyPairGenerator.generateKey();
    } catch (Throwable e) {
        e.printStackTrace();
        log.error(e.getMessage());
        throw new RuntimeException("Couldn't generate key");
    }
}