handle SimpleSecretKey equality and copy helpers

Author: kares

src/main/java/org/jruby/ext/openssl/SimpleSecretKey.java

@@ -12,7 +12,7 @@
  * rights and limitations under the License.
  *
  * Copyright (C) 2006 Ola Bini <[email protected]>
- * 
+ *
  * Alternatively, the contents of this file may be used under the terms of
  * either of the GNU General Public License Version 2 or later (the "GPL"),
  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
@@ -33,21 +33,57 @@
  * @author <a href="mailto:[email protected]">Ola Bini</a>
  */
 public class SimpleSecretKey implements SecretKey {
+
     private static final long serialVersionUID = 1L;
 
     private final String algorithm;
     private final byte[] value;
-    public SimpleSecretKey(String algorithm, byte[] value) {
+
+    public SimpleSecretKey(final String algorithm, final byte[] value) {
         this.algorithm = algorithm;
         this.value = value;
     }
+
+    public static SimpleSecretKey copy(String algorithm, final byte[] value) {
+        return copy(algorithm, value, 0, value.length);
+    }
+
+    public static SimpleSecretKey copy(String algorithm, final byte[] value, int off, int len) {
+        final byte[] val = new byte[len];
+        System.arraycopy(value, off, val, 0, len);
+        return new SimpleSecretKey(algorithm, val);
+    }
+
     public String getAlgorithm() {
         return algorithm;
     }
+
     public byte[] getEncoded() {
         return value;
     }
+
     public String getFormat() {
         return "RAW";
-    }        
+    }
+
+    public boolean equals(Object o) {
+        if ( o instanceof SimpleSecretKey ) {
+            byte[] ovalue = ((SimpleSecretKey) o).value;
+            if ( value.length != ovalue.length ) return false;
+            for ( int i = 0; i < value.length; i++ ) {
+                if ( value[i] != ovalue[i] ) return false;
+            }
+            return algorithm.equals( ((SimpleSecretKey) o).algorithm );
+        }
+        return false;
+    }
+
+    public int hashCode() {
+        int code = 0;
+        for ( int i = 0; i < value.length; i++ ) {
+            code ^= (value[i] & 0xff) << (i << 3 & 31);
+        }
+        return code ^ algorithm.hashCode();
+    }
+
 }// SimpleSecretKey