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

Example 71 with SecretKey

use of javax.crypto.SecretKey in project android_frameworks_base by ResurrectionRemix.

the class LockSettingsService method getDecryptedPasswordForTiedProfile.

private String getDecryptedPasswordForTiedProfile(int userId) throws KeyStoreException, UnrecoverableKeyException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, CertificateException, IOException {
    if (DEBUG)
        Slog.v(TAG, "Get child profile decrytped key");
    byte[] storedData = mStorage.readChildProfileLock(userId);
    if (storedData == null) {
        throw new FileNotFoundException("Child profile lock file not found");
    }
    byte[] iv = Arrays.copyOfRange(storedData, 0, PROFILE_KEY_IV_SIZE);
    byte[] encryptedPassword = Arrays.copyOfRange(storedData, PROFILE_KEY_IV_SIZE, storedData.length);
    byte[] decryptionResult;
    java.security.KeyStore keyStore = java.security.KeyStore.getInstance("AndroidKeyStore");
    keyStore.load(null);
    SecretKey decryptionKey = (SecretKey) keyStore.getKey(LockPatternUtils.PROFILE_KEY_NAME_DECRYPT + userId, null);
    Cipher cipher = Cipher.getInstance(KeyProperties.KEY_ALGORITHM_AES + "/" + KeyProperties.BLOCK_MODE_GCM + "/" + KeyProperties.ENCRYPTION_PADDING_NONE);
    cipher.init(Cipher.DECRYPT_MODE, decryptionKey, new GCMParameterSpec(128, iv));
    decryptionResult = cipher.doFinal(encryptedPassword);
    return new String(decryptionResult, StandardCharsets.UTF_8);
}

Example 72 with SecretKey

use of javax.crypto.SecretKey in project yyl_example by Relucent.

the class AES method decrypt.

//=================================Methods================================================
/**
	 * 将密文使用AES进行解密
	 * @param encryptText 密文字符串
	 * @return 解密后的字符串
	 */
public String decrypt(String encryptText) throws Exception {
    //通过SecretKeySpec形成一个key
    SecretKey key = new SecretKeySpec(keyByte, "AES");
    //获得一个私鈅加密类Cipher，ECB是加密方式，PKCS5Padding是填充方法
    Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
    //使用私鈅解密
    cipher.init(Cipher.DECRYPT_MODE, key);
    byte[] NewCipherText = hexStringTobyteArray(encryptText);
    byte[] newString = cipher.doFinal(NewCipherText);
    return new String(newString, encoding);
}

Example 73 with SecretKey

use of javax.crypto.SecretKey in project yyl_example by Relucent.

the class DES_Encrypt method getKeyDate.

/** 获得一个密匙数据* */
public static byte[] getKeyDate() throws Exception {
    KeyGenerator kg = KeyGenerator.getInstance("DES");
    kg.init(new SecureRandom());
    SecretKey key = kg.generateKey();
    return key.getEncoded();
}

Example 74 with SecretKey

use of javax.crypto.SecretKey in project yyl_example by Relucent.

the class DES_Encrypt method decode.

public static byte[] decode(byte[] bytes, byte[] keydate) throws Exception {
    // 从原始密匙数据创建一个DESKeySpec对象
    DESKeySpec dks = new DESKeySpec(keydate);
    // 创建一个密匙工厂获得SecretKey对象
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
    SecretKey key = keyFactory.generateSecret(dks);
    // Cipher对象实际完成解密操作
    Cipher cipher = Cipher.getInstance("DES");
    // 用密匙初始化Cipher对象
    cipher.init(Cipher.DECRYPT_MODE, key, new SecureRandom());
    // 执行解密操作
    return cipher.doFinal(bytes);
}

Example 75 with SecretKey

use of javax.crypto.SecretKey in project yyl_example by Relucent.

the class PBEWithMD5AndDES_Encrypt method encrypt.

/**
	 * 将传进来的明文以PBEWithMD5AndDES算法进行加密
	 * 
	 * @param text String
	 * @return String
	 */
public String encrypt(String text) throws Exception {
    if (text == null || text.length() == 0) {
        return "";
    }
    PBEKeySpec pbks = new PBEKeySpec(password.toCharArray());
    SecretKeyFactory skf = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
    SecretKey k = skf.generateSecret(pbks);
    byte[] salt = new byte[8];
    Random r = new Random();
    r.nextBytes(salt);
    Cipher cp = Cipher.getInstance("PBEWithMD5AndDES");
    PBEParameterSpec ps = new PBEParameterSpec(salt, 1000);
    cp.init(Cipher.ENCRYPT_MODE, k, ps);
    byte[] ptext = text.getBytes(encoding);
    byte[] ctext = cp.doFinal(ptext);
    String result = "";
    for (int i = 0; i < salt.length; i++) {
        result += salt[i] + " ";
    }
    for (int i = 0; i < ctext.length; i++) {
        result += ctext[i] + " ";
    }
    return string2hex(result);
}