Examples with KeySpec java.security.spec.KeySpec used on opensource projects

Example 26 with KeySpec

use of java.security.spec.KeySpec in project felix by apache.

the class CryptoServiceSingleton method generateAESKey.

/**
 * Generate the AES key from the salt and the private key.
 *
 * @param salt       the salt (hexadecimal)
 * @param privateKey the private key
 * @return the generated key.
 */
private SecretKey generateAESKey(String privateKey, String salt) {
    try {
        byte[] raw = Hex.decodeHex(salt.toCharArray());
        KeySpec spec = new PBEKeySpec(privateKey.toCharArray(), raw, iterationCount, keySize);
        SecretKeyFactory factory = SecretKeyFactory.getInstance(PBKDF_2_WITH_HMAC_SHA_1);
        return new SecretKeySpec(factory.generateSecret(spec).getEncoded(), AES_ECB_ALGORITHM);
    } catch (DecoderException e) {
        throw new IllegalStateException(e);
    } catch (NoSuchAlgorithmException e) {
        throw new IllegalStateException(e);
    } catch (InvalidKeySpecException e) {
        throw new IllegalStateException(e);
    }
}

Example 27 with KeySpec

use of java.security.spec.KeySpec in project android by nextcloud.

the class EncryptionUtils method decryptPrivateKey.

/**
 * Decrypt private key with symmetric AES encryption, GCM mode mode and no padding
 *
 * @param privateKey byte64 encoded string representation of private key, IV separated with "|"
 * @param keyPhrase  key used for encryption, e.g. 12 random words
 *                   {@link EncryptionUtils#getRandomWords(int, Context)}
 * @return decrypted string
 */
public static String decryptPrivateKey(String privateKey, String keyPhrase) throws NoSuchPaddingException, NoSuchAlgorithmException, NoSuchProviderException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException, InvalidKeySpecException, InvalidAlgorithmParameterException {
    // split up iv, salt
    String[] strings = privateKey.split(ivDelimiter);
    String realPrivateKey = strings[0];
    byte[] iv = decodeStringToBase64Bytes(strings[1]);
    byte[] salt = decodeStringToBase64Bytes(strings[2]);
    Cipher cipher = Cipher.getInstance(AES_CIPHER);
    SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
    KeySpec spec = new PBEKeySpec(keyPhrase.toCharArray(), salt, iterationCount, keyStrength);
    SecretKey tmp = factory.generateSecret(spec);
    SecretKeySpec key = new SecretKeySpec(tmp.getEncoded(), AES);
    cipher.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(iv));
    byte[] bytes = decodeStringToBase64Bytes(realPrivateKey);
    byte[] decrypted = cipher.doFinal(bytes);
    String pemKey = decodeBase64BytesToString(decrypted);
    return pemKey.replaceAll("\n", "").replace("-----BEGIN PRIVATE KEY-----", "").replace("-----END PRIVATE KEY-----", "");
}

Example 28 with KeySpec

use of java.security.spec.KeySpec in project pentaho-kettle by pentaho.

the class CertificateGenEncryptUtil method decodeTransmittedKey.

public static Key decodeTransmittedKey(byte[] sessionKey, byte[] transmittedKey, boolean privateKey) throws InvalidKeySpecException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException {
    KeySpec keySpec = null;
    Key keyKey = null;
    if (transmittedKey == null || sessionKey == null) {
        return null;
    }
    if (!privateKey) {
        keySpec = new X509EncodedKeySpec(sessionKey);
        keyKey = KeyFactory.getInstance(PUBLIC_KEY_ALGORITHM).generatePublic(keySpec);
    } else {
        keySpec = new PKCS8EncodedKeySpec(sessionKey);
        keyKey = KeyFactory.getInstance(PUBLIC_KEY_ALGORITHM).generatePrivate(keySpec);
    }
    Cipher keyCipher = Cipher.getInstance(TRANSMISSION_CIPHER_PARAMS);
    keyCipher.init(Cipher.UNWRAP_MODE, keyKey);
    return keyCipher.unwrap(transmittedKey, SINGLE_KEY_ALGORITHM, Cipher.SECRET_KEY);
}

Example 29 with KeySpec

use of java.security.spec.KeySpec in project chuidiang-ejemplos by chuidiang.

the class RSAAsymetricCrypto method loadPrivateKey.

private static PrivateKey loadPrivateKey(String fileName) throws Exception {
    FileInputStream fis = new FileInputStream(fileName);
    int numBtyes = fis.available();
    byte[] bytes = new byte[numBtyes];
    fis.read(bytes);
    fis.close();
    KeyFactory keyFactory = KeyFactory.getInstance("RSA");
    KeySpec keySpec = new PKCS8EncodedKeySpec(bytes);
    PrivateKey keyFromBytes = keyFactory.generatePrivate(keySpec);
    return keyFromBytes;
}

Example 30 with KeySpec

use of java.security.spec.KeySpec in project chuidiang-ejemplos by chuidiang.

the class RSAAsymetricCrypto method loadPublicKey.

private static PublicKey loadPublicKey(String fileName) throws Exception {
    FileInputStream fis = new FileInputStream(fileName);
    int numBtyes = fis.available();
    byte[] bytes = new byte[numBtyes];
    fis.read(bytes);
    fis.close();
    KeyFactory keyFactory = KeyFactory.getInstance("RSA");
    KeySpec keySpec = new X509EncodedKeySpec(bytes);
    PublicKey keyFromBytes = keyFactory.generatePublic(keySpec);
    return keyFromBytes;
}