1 files changed, 153 insertions, 0 deletions
diff --git a/security-util-lib/src/main/java/org/onap/sdc/security/SecurityUtil.java b/security-util-lib/src/main/java/org/onap/sdc/security/SecurityUtil.java
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+++ b/security-util-lib/src/main/java/org/onap/sdc/security/SecurityUtil.java
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+/*-
+ * ============LICENSE_START=======================================================
+ * SDC
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.sdc.security;
+
+import fj.data.Either;
+import org.onap.sdc.security.logging.wrappers.Logger;
+
+import javax.crypto.BadPaddingException;
+import javax.crypto.Cipher;
+import javax.crypto.IllegalBlockSizeException;
+import javax.crypto.NoSuchPaddingException;
+import javax.crypto.spec.SecretKeySpec;
+import java.io.UnsupportedEncodingException;
+import java.nio.charset.StandardCharsets;
+import java.security.InvalidKeyException;
+import java.security.Key;
+import java.security.NoSuchAlgorithmException;
+import java.util.Base64;
+
+public class SecurityUtil {
+
+    private static final Logger LOG = Logger.getLogger( SecurityUtil.class );
+    private static final byte[] KEY = new byte[]{-64,5,-32 ,-117 ,-44,8,-39, 1, -9, 36,-46,-81, 62,-15,-63,-75};
+    public static final SecurityUtil INSTANCE = new SecurityUtil();
+    public static final String ALGORITHM = "AES" ;
+    public static final String CHARSET = StandardCharsets.UTF_8.name();
+
+    public static Key secKey = null ;
+
+    /**
+     *
+     * cmd commands >$PROGRAM_NAME decrypt "$ENCRYPTED_MSG"
+     *              >$PROGRAM_NAME encrypt "message"
+    **/
+
+    private SecurityUtil(){ super(); }
+
+    static {
+        try{
+            secKey = generateKey( KEY, ALGORITHM );
+        }
+        catch(Exception e){
+            LOG.warn("cannot generate key for {}", ALGORITHM);
+        }
+    }
+
+
+
+    public static Key generateKey(final byte[] KEY, String algorithm){
+        return new SecretKeySpec(KEY, algorithm);
+    }
+
+    //obfuscates key prefix -> **********
+    public String obfuscateKey(String sensitiveData){
+
+        if (sensitiveData != null){
+            int len = sensitiveData.length();
+            StringBuilder builder = new StringBuilder(sensitiveData);
+            for (int i=0; i<len/2; i++){
+                builder.setCharAt(i, '*');
+            }
+            return builder.toString();
+        }
+        return sensitiveData;
+    }
+
+    /**
+     *  @param strDataToEncrypt - plain string to encrypt
+     *  Encrypt the Data
+     * 		a. Declare / Initialize the Data. Here the data is of type String
+     * 		b. Convert the Input Text to Bytes
+     * 		c. Encrypt the bytes using doFinal method
+     */
+    public Either<String,String> encrypt(String strDataToEncrypt){
+        if (strDataToEncrypt != null ){
+            try {
+                LOG.debug("Encrypt key -> {}", secKey);
+                Cipher aesCipherForEncryption = Cipher.getInstance("AES");          // Must specify the mode explicitly as most JCE providers default to ECB mode!!
+                aesCipherForEncryption.init(Cipher.ENCRYPT_MODE, secKey);
+                byte[] byteDataToEncrypt = strDataToEncrypt.getBytes();
+                byte[] byteCipherText = aesCipherForEncryption.doFinal(byteDataToEncrypt);
+                String strCipherText = new String( Base64.getMimeEncoder().encode(byteCipherText), CHARSET );
+                LOG.debug("Cipher Text generated using AES is {}", strCipherText);
+                return Either.left(strCipherText);
+            } catch( NoSuchAlgorithmException | UnsupportedEncodingException e){
+                LOG.warn( "cannot encrypt data unknown algorithm or missing encoding for {}" ,secKey.getAlgorithm());
+            } catch( InvalidKeyException e){
+                LOG.warn( "invalid key recieved - > {} | {}" , Base64.getDecoder().decode( secKey.getEncoded() ), e.getMessage() );
+            } catch( IllegalBlockSizeException | BadPaddingException | NoSuchPaddingException  e){
+                LOG.warn( "bad algorithm definition (Illegal Block Size or padding), please review you algorithm block&padding" , e.getMessage() );
+            }
+        }
+        return Either.right("Cannot encrypt "+strDataToEncrypt);
+    }
+
+    /**
+     * Decrypt the Data
+     * @param byteCipherText - should be valid bae64 input in the length of 16bytes
+     * @param isBase64Decoded - is data already base64 encoded&aligned to 16 bytes
+     * 		a. Initialize a new instance of Cipher for Decryption (normally don't reuse the same object)
+     * 		b. Decrypt the cipher bytes using doFinal method
+     */
+    public Either<String,String> decrypt(byte[] byteCipherText , boolean isBase64Decoded){
+        if (byteCipherText != null){
+            byte[] alignedCipherText = byteCipherText;
+            try{
+                if (isBase64Decoded)
+                    alignedCipherText = Base64.getDecoder().decode(byteCipherText);
+                LOG.debug("Decrypt key -> "+secKey.getEncoded());
+                Cipher aesCipherForDecryption = Cipher.getInstance("AES"); // Must specify the mode explicitly as most JCE providers default to ECB mode!!
+                aesCipherForDecryption.init(Cipher.DECRYPT_MODE, secKey);
+                byte[] byteDecryptedText = aesCipherForDecryption.doFinal(alignedCipherText);
+                String strDecryptedText = new String(byteDecryptedText);
+                LOG.debug("Decrypted Text message is: {}" , obfuscateKey( strDecryptedText ));
+                return Either.left(strDecryptedText);
+            } catch( NoSuchAlgorithmException e){
+                LOG.warn( "cannot encrypt data unknown algorithm or missing encoding for {}" ,secKey.getAlgorithm());
+            } catch( InvalidKeyException e){
+                LOG.warn( "invalid key recieved - > {} | {}" , Base64.getDecoder().decode( secKey.getEncoded() ), e.getMessage() );
+            } catch( IllegalBlockSizeException | BadPaddingException | NoSuchPaddingException  e){
+                LOG.warn( "bad algorithm definition (Illegal Block Size or padding), please review you algorithm block&padding" , e.getMessage() );
+            }
+        }
+        return Either.right("Decrypt FAILED");
+    }
+
+    public Either<String,String> decrypt(String byteCipherText){
+        try {
+            return decrypt(byteCipherText.getBytes(CHARSET),true);
+        } catch( UnsupportedEncodingException e ){
+            LOG.warn( "Missing encoding for {} | {} " ,secKey.getAlgorithm() , e.getMessage());
+        }
+        return Either.right("Decrypt FAILED");
+    }
+}