1 files changed, 131 insertions, 0 deletions
diff --git a/cadi/core/src/main/java/org/onap/ccsdk/apps/cadi/AES.java b/cadi/core/src/main/java/org/onap/ccsdk/apps/cadi/AES.java
new file mode 100644
index 00000000..55e148a9
--- /dev/null
+++ b/cadi/core/src/main/java/org/onap/ccsdk/apps/cadi/AES.java
@@ -0,0 +1,131 @@
+/**
+ * ============LICENSE_START====================================================
+ * org.onap.ccsdk
+ * ===========================================================================
+ * Copyright (c) 2023 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.ccsdk.apps.cadi;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.security.InvalidKeyException;
+import java.security.NoSuchAlgorithmException;
+
+import javax.crypto.BadPaddingException;
+import javax.crypto.Cipher;
+import javax.crypto.CipherInputStream;
+import javax.crypto.CipherOutputStream;
+import javax.crypto.IllegalBlockSizeException;
+import javax.crypto.KeyGenerator;
+import javax.crypto.NoSuchPaddingException;
+import javax.crypto.SecretKey;
+import javax.crypto.spec.SecretKeySpec;
+
+import org.onap.ccsdk.apps.cadi.Symm.Encryption;
+import org.onap.ccsdk.apps.cadi.util.Chmod;
+
+
+/**
+ * AES Class wraps Cipher AES, 128
+ * NOTE: While not explicitly stated in JavaDocs, Ciphers AND SecretKeySpecs are NOT ThreadSafe
+ * Ciphers take time to create, therefore, we have pooled them.
+ *
+ * @author Jonathan
+ *
+ */
+public class AES implements Encryption {
+    public static final String AES = AES.class.getSimpleName();
+    public static final int AES_KEY_SIZE = 128; // 256 isn't supported on all JDKs.
+
+    private SecretKeySpec aeskeySpec;
+
+    public static SecretKey newKey() throws NoSuchAlgorithmException {
+        KeyGenerator kgen = KeyGenerator.getInstance(AES);
+        kgen.init(AES_KEY_SIZE);
+        return kgen.generateKey();
+    }
+
+    public AES(byte[] aeskey, int offset, int len){
+        aeskeySpec = new SecretKeySpec(aeskey,offset,len,AES);
+    }
+
+    public byte[] encrypt(byte[] in) throws CadiException {
+        try {
+            Cipher c = Cipher.getInstance(AES);
+            c.init(Cipher.ENCRYPT_MODE,aeskeySpec);
+            return c.doFinal(in);
+        } catch (InvalidKeyException | IllegalBlockSizeException | BadPaddingException | NoSuchAlgorithmException | NoSuchPaddingException e) {
+            throw new CadiException(e);
+        }
+    }
+
+    public byte[] decrypt(byte[] in) throws CadiException {
+        try {
+            Cipher c = Cipher.getInstance(AES);
+            c.init(Cipher.DECRYPT_MODE,aeskeySpec);
+            return c.doFinal(in);
+        } catch (InvalidKeyException | IllegalBlockSizeException | BadPaddingException | NoSuchAlgorithmException | NoSuchPaddingException e) {
+            throw new CadiException(e);
+        }
+    }
+
+    public void save(File keyfile) throws IOException {
+        FileOutputStream fis = new FileOutputStream(keyfile);
+        try {
+            fis.write(aeskeySpec.getEncoded());
+        } finally {
+            fis.close();
+        }
+        Chmod.to400.chmod(keyfile);
+    }
+
+    public CipherOutputStream outputStream(OutputStream os, boolean encrypt) {
+        try {
+            Cipher c = Cipher.getInstance(AES);
+            if (encrypt) {
+                c.init(Cipher.ENCRYPT_MODE,aeskeySpec);
+            } else {
+                c.init(Cipher.DECRYPT_MODE,aeskeySpec);
+            }
+            return new CipherOutputStream(os,c);
+        } catch (InvalidKeyException | NoSuchAlgorithmException | NoSuchPaddingException e) {
+            // Cannot add Exception to this API.  throw Runtime
+            System.err.println("Error creating Aes CipherOutputStream");
+            return null;  // should never get here.
+        }
+    }
+
+    public CipherInputStream inputStream(InputStream is, boolean encrypt) {
+        try {
+            Cipher c = Cipher.getInstance(AES);
+            if (encrypt) {
+                c.init(Cipher.ENCRYPT_MODE,aeskeySpec);
+            } else {
+                c.init(Cipher.DECRYPT_MODE,aeskeySpec);
+            }
+            return new CipherInputStream(is,c);
+        } catch (InvalidKeyException | NoSuchAlgorithmException | NoSuchPaddingException e) {
+            // Cannot add Exception to this API.  throw Runtime
+            System.err.println("Error creating Aes CipherInputStream");
+            return null;  // should never get here.
+        }
+    }
+}