package org.onap.clamp.clds.util;
+import com.att.eelf.configuration.EELFLogger;
+import com.att.eelf.configuration.EELFManager;
+
+import java.io.IOException;
+import java.io.UnsupportedEncodingException;
import java.security.GeneralSecurityException;
+import java.security.SecureRandom;
+import java.util.Properties;
import javax.crypto.Cipher;
+import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
-import org.springframework.core.Ordered;
-import org.springframework.core.annotation.Order;
-import org.springframework.stereotype.Component;
+import org.apache.commons.codec.DecoderException;
+import org.apache.commons.codec.binary.Hex;
+import org.apache.commons.lang3.ArrayUtils;
/**
* CryptoUtils for encrypting/decrypting string based on a Key defined in
* application.properties (Spring config file).
*
*/
-@Component("CryptoUtils")
-@Order(Ordered.HIGHEST_PRECEDENCE)
public final class CryptoUtils {
- public static final String AES = "AES";
- public static final String KEY_PARAM = "org.onap.clamp.encryption.aes.key";
- private SecretKeySpec secretKeySpec = getSecretKeySpec("aa3871669d893c7fb8abbcda31b88b4f");
+ protected static final EELFLogger logger = EELFManager.getInstance().getLogger(CryptoUtils.class);
+ // Openssl commands:
+ // Encrypt: echo -n "123456" | openssl aes-128-cbc -e -K <Private Hex key>
+ // -iv <16 Hex Bytes iv> | xxd -u -g100
+ // Final result is to put in properties file is: IV + Outcome of openssl
+ // command
+ // ************************************************************
+ // Decrypt: echo -n 'Encrypted string' | xxd -r -ps | openssl aes-128-cbc -d
+ // -K
+ // <Private Hex Key> -iv <16 Bytes IV extracted from Encrypted String>
+ private static final String ALGORITHM = "AES";
+ private static final String ALGORYTHM_DETAILS = ALGORITHM + "/CBC/PKCS5PADDING";
+ private static final int BLOCK_SIZE = 128;
+ private static final String KEY_PARAM = "org.onap.clamp.encryption.aes.key";
+ private static SecretKeySpec secretKeySpec = null;
+ private IvParameterSpec ivspec;
+ static {
+ Properties props = new Properties();
+ try {
+ props.load(ResourceFileUtil.getResourceAsStream("clds/key.properties"));
+ secretKeySpec = getSecretKeySpec(props.getProperty(KEY_PARAM));
+ } catch (IOException | DecoderException e) {
+ logger.error("Exception occurred during the key reading", e);
+ }
+ }
/**
* Encrypt a value based on the Clamp Encryption Key.
* @return The encrypted string
* @throws GeneralSecurityException
* In case of issue with the encryption
+ * @throws UnsupportedEncodingException
+ * In case of issue with the charset conversion
*/
- public String encrypt(String value) throws GeneralSecurityException {
- Cipher cipher = Cipher.getInstance(CryptoUtils.AES);
- cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, cipher.getParameters());
- byte[] encrypted = cipher.doFinal(value.getBytes());
- return byteArrayToHexString(encrypted);
+ public String encrypt(String value) throws GeneralSecurityException, UnsupportedEncodingException {
+ Cipher cipher = Cipher.getInstance(CryptoUtils.ALGORYTHM_DETAILS, "SunJCE");
+ SecureRandom r = SecureRandom.getInstance("SHA1PRNG");
+ byte[] iv = new byte[BLOCK_SIZE / 8];
+ r.nextBytes(iv);
+ ivspec = new IvParameterSpec(iv);
+ cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, ivspec);
+ return Hex.encodeHexString(ArrayUtils.addAll(iv, cipher.doFinal(value.getBytes("UTF-8"))));
}
/**
- * Decrypt a value.
+ * Decrypt a value based on the Clamp Encryption Key
*
* @param message
* The encrypted string that must be decrypted using the Clamp
* @return The String decrypted
* @throws GeneralSecurityException
* In case of issue with the encryption
+ * @throws DecoderException
+ * In case of issue to decode the HexString
*/
- public String decrypt(String message) throws GeneralSecurityException {
- Cipher cipher = Cipher.getInstance(CryptoUtils.AES);
- cipher.init(Cipher.DECRYPT_MODE, secretKeySpec);
- byte[] decrypted = cipher.doFinal(hexStringToByteArray(message));
+ public String decrypt(String message) throws GeneralSecurityException, DecoderException {
+ byte[] encryptedMessage = Hex.decodeHex(message.toCharArray());
+ Cipher cipher = Cipher.getInstance(CryptoUtils.ALGORYTHM_DETAILS, "SunJCE");
+ ivspec = new IvParameterSpec(ArrayUtils.subarray(encryptedMessage, 0, BLOCK_SIZE / 8));
+ byte[] realData = ArrayUtils.subarray(encryptedMessage, BLOCK_SIZE / 8, encryptedMessage.length);
+ cipher.init(Cipher.DECRYPT_MODE, secretKeySpec, ivspec);
+ byte[] decrypted = cipher.doFinal(realData);
return new String(decrypted);
}
- private SecretKeySpec getSecretKeySpec(String keyString) {
- byte[] key = hexStringToByteArray(keyString);
- return new SecretKeySpec(key, CryptoUtils.AES);
- }
-
- private String byteArrayToHexString(byte[] b) {
- StringBuilder sb = new StringBuilder(b.length * 2);
- for (int i = 0; i < b.length; i++) {
- int v = b[i] & 0xff;
- if (v < 16) {
- sb.append('0');
- }
- sb.append(Integer.toHexString(v));
- }
- return sb.toString().toUpperCase();
- }
-
- private byte[] hexStringToByteArray(String s) {
- byte[] b = new byte[s.length() / 2];
- for (int i = 0; i < b.length; i++) {
- int index = i * 2;
- int v = Integer.parseInt(s.substring(index, index + 2), 16);
- b[i] = (byte) v;
- }
- return b;
+ private static SecretKeySpec getSecretKeySpec(String keyString) throws DecoderException {
+ byte[] key = Hex.decodeHex(keyString.toCharArray());
+ return new SecretKeySpec(key, CryptoUtils.ALGORITHM);
}
}
Code Review / clamp.git / blobdiff