| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.syncope.core.spring.security; |
| |
| import java.io.UnsupportedEncodingException; |
| import java.nio.charset.StandardCharsets; |
| import java.security.InvalidKeyException; |
| import java.security.NoSuchAlgorithmException; |
| import java.util.Base64; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| import javax.crypto.BadPaddingException; |
| import javax.crypto.Cipher; |
| import javax.crypto.IllegalBlockSizeException; |
| import javax.crypto.NoSuchPaddingException; |
| import javax.crypto.spec.SecretKeySpec; |
| import org.apache.commons.lang3.ArrayUtils; |
| import org.apache.commons.lang3.StringUtils; |
| import org.apache.syncope.common.lib.types.CipherAlgorithm; |
| import org.apache.syncope.core.spring.ApplicationContextProvider; |
| import org.jasypt.commons.CommonUtils; |
| import org.jasypt.digest.StandardStringDigester; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.springframework.security.crypto.bcrypt.BCrypt; |
| |
| public final class Encryptor { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(Encryptor.class); |
| |
| private static final Map<String, Encryptor> INSTANCES = new ConcurrentHashMap<>(); |
| |
| private static final String DEFAULT_SECRET_KEY = "1abcdefghilmnopqrstuvz2!"; |
| |
| public static Encryptor getInstance() { |
| return getInstance(null); |
| } |
| |
| public static Encryptor getInstance(final String secretKey) { |
| String actualKey = StringUtils.isBlank(secretKey) ? DEFAULT_SECRET_KEY : secretKey; |
| |
| Encryptor instance = INSTANCES.get(actualKey); |
| if (instance == null) { |
| instance = new Encryptor(actualKey); |
| INSTANCES.put(actualKey, instance); |
| } |
| |
| return instance; |
| } |
| |
| private final Map<CipherAlgorithm, StandardStringDigester> digesters = new ConcurrentHashMap<>(); |
| |
| private SecretKeySpec keySpec; |
| |
| private Encryptor(final String secretKey) { |
| String actualKey = secretKey; |
| if (actualKey.length() < 16) { |
| StringBuilder actualKeyPadding = new StringBuilder(actualKey); |
| int length = 16 - actualKey.length(); |
| String randomChars = SecureRandomUtils.generateRandomPassword(length); |
| |
| actualKeyPadding.append(randomChars); |
| actualKey = actualKeyPadding.toString(); |
| LOG.warn("The secret key is too short (< 16), adding some random characters. " |
| + "Passwords encrypted with AES and this key will not be recoverable " |
| + "as a result if the container is restarted."); |
| } |
| |
| try { |
| keySpec = new SecretKeySpec(ArrayUtils.subarray( |
| actualKey.getBytes(StandardCharsets.UTF_8), 0, 16), |
| CipherAlgorithm.AES.getAlgorithm()); |
| } catch (Exception e) { |
| LOG.error("Error during key specification", e); |
| } |
| } |
| |
| public String encode(final String value, final CipherAlgorithm cipherAlgorithm) |
| throws UnsupportedEncodingException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, |
| IllegalBlockSizeException, BadPaddingException { |
| |
| String encoded = null; |
| |
| if (value != null) { |
| if (cipherAlgorithm == null || cipherAlgorithm == CipherAlgorithm.AES) { |
| Cipher cipher = Cipher.getInstance(CipherAlgorithm.AES.getAlgorithm()); |
| cipher.init(Cipher.ENCRYPT_MODE, keySpec); |
| |
| encoded = Base64.getEncoder().encodeToString(cipher.doFinal(value.getBytes(StandardCharsets.UTF_8))); |
| } else if (cipherAlgorithm == CipherAlgorithm.BCRYPT) { |
| encoded = BCrypt.hashpw(value, BCrypt.gensalt()); |
| } else { |
| encoded = getDigester(cipherAlgorithm).digest(value); |
| } |
| } |
| |
| return encoded; |
| } |
| |
| public boolean verify(final String value, final CipherAlgorithm cipherAlgorithm, final String encoded) { |
| boolean verified = false; |
| |
| try { |
| if (value != null) { |
| if (cipherAlgorithm == null || cipherAlgorithm == CipherAlgorithm.AES) { |
| verified = encode(value, cipherAlgorithm).equals(encoded); |
| } else if (cipherAlgorithm == CipherAlgorithm.BCRYPT) { |
| verified = BCrypt.checkpw(value, encoded); |
| } else { |
| verified = getDigester(cipherAlgorithm).matches(value, encoded); |
| } |
| } |
| } catch (Exception e) { |
| LOG.error("Could not verify encoded value", e); |
| } |
| |
| return verified; |
| } |
| |
| public String decode(final String encoded, final CipherAlgorithm cipherAlgorithm) |
| throws UnsupportedEncodingException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, |
| IllegalBlockSizeException, BadPaddingException { |
| |
| String decoded = null; |
| |
| if (encoded != null && cipherAlgorithm == CipherAlgorithm.AES) { |
| Cipher cipher = Cipher.getInstance(CipherAlgorithm.AES.getAlgorithm()); |
| cipher.init(Cipher.DECRYPT_MODE, keySpec); |
| |
| decoded = new String(cipher.doFinal(Base64.getDecoder().decode(encoded)), StandardCharsets.UTF_8); |
| } |
| |
| return decoded; |
| } |
| |
| private StandardStringDigester getDigester(final CipherAlgorithm cipherAlgorithm) { |
| StandardStringDigester digester = digesters.get(cipherAlgorithm); |
| if (digester == null) { |
| digester = new StandardStringDigester(); |
| |
| if (cipherAlgorithm.getAlgorithm().startsWith("S-")) { |
| SecurityProperties securityProperties = |
| ApplicationContextProvider.getApplicationContext().getBean(SecurityProperties.class); |
| |
| // Salted ... |
| digester.setAlgorithm(cipherAlgorithm.getAlgorithm().replaceFirst("S\\-", "")); |
| digester.setIterations(securityProperties.getDigester().getSaltIterations()); |
| digester.setSaltSizeBytes(securityProperties.getDigester().getSaltSizeBytes()); |
| digester.setInvertPositionOfPlainSaltInEncryptionResults( |
| securityProperties.getDigester().isInvertPositionOfPlainSaltInEncryptionResults()); |
| digester.setInvertPositionOfSaltInMessageBeforeDigesting( |
| securityProperties.getDigester().isInvertPositionOfSaltInMessageBeforeDigesting()); |
| digester.setUseLenientSaltSizeCheck( |
| securityProperties.getDigester().isUseLenientSaltSizeCheck()); |
| } else { |
| // Not salted ... |
| digester.setAlgorithm(cipherAlgorithm.getAlgorithm()); |
| digester.setIterations(1); |
| digester.setSaltSizeBytes(0); |
| } |
| |
| digester.setStringOutputType(CommonUtils.STRING_OUTPUT_TYPE_HEXADECIMAL); |
| |
| digesters.put(cipherAlgorithm, digester); |
| } |
| |
| return digester; |
| } |
| } |