AT&T 2.0.19 Code drop, stage 2

[aaf/authz.git] / cadi / aaf / src / main / java / org / onap / aaf / cadi / oauth / AAFToken.java

diff --git a/cadi/aaf/src/main/java/org/onap/aaf/cadi/oauth/AAFToken.java b/cadi/aaf/src/main/java/org/onap/aaf/cadi/oauth/AAFToken.java
new file mode 100644 (file)
index 0000000..16bd866
--- /dev/null
+++ b/cadi/aaf/src/main/java/org/onap/aaf/cadi/oauth/AAFToken.java
@@ -0,0 +1,86 @@
+/**
+ * ============LICENSE_START====================================================
+ * org.onap.aaf
+ * ===========================================================================
+ * Copyright (c) 2018 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.aaf.cadi.oauth;
+
+import java.nio.ByteBuffer;
+import java.security.SecureRandom;
+import java.util.UUID;
+
+import org.onap.aaf.cadi.Hash;
+
+public class AAFToken {
+       private static final int CAPACITY = (Long.SIZE*2+Byte.SIZE*3)/8;
+       private static final SecureRandom sr = new SecureRandom(); 
+
+       public static final String toToken(UUID uuid) {
+               long lsb = uuid.getLeastSignificantBits();
+               long msb = uuid.getMostSignificantBits();
+               int sum=35; // AAF
+               for(int i=0;i<Long.SIZE;i+=8) {
+                       sum+=((lsb>>i) & 0xFF);
+               }
+               for(int i=0;i<Long.SIZE;i+=8) {
+                       sum+=((((msb>>i) & 0xFF))<<0xB);
+               }
+               sum+=(sr.nextInt()&0xEFC00000); // this is just to not leave zeros laying around
+
+               ByteBuffer bb = ByteBuffer.allocate(CAPACITY);
+               bb.put((byte)sum);
+               bb.putLong(msb);
+               bb.put((byte)(sum>>8));
+               bb.putLong(lsb);
+               bb.put((byte)(sum>>16));
+               return Hash.toHexNo0x(bb.array());
+       }
+
+       public static final UUID fromToken(String token)  {
+               byte[] bytes = Hash.fromHexNo0x(token);
+               if(bytes==null) {
+                       return null;
+               }
+               ByteBuffer bb = ByteBuffer.wrap(bytes);
+               if(bb.capacity()!=CAPACITY ) {
+                       return null; // not a CADI Token
+               }
+               byte b1 = bb.get();
+               long msb = bb.getLong();
+               byte b2 = bb.get();
+               long lsb = bb.getLong();
+               byte b3 = (byte)(0x3F&bb.get());
+               int sum=35;
+               
+               for(int i=0;i<Long.SIZE;i+=8) {
+                       sum+=((lsb>>i) & 0xFF);
+               }
+               for(int i=0;i<Long.SIZE;i+=8) {
+                       sum+=((((msb>>i) & 0xFF))<<0xB);
+               }
+
+               if(b1!=((byte)sum) ||
+                  b2!=((byte)(sum>>8)) ||
+                  b3!=((byte)((sum>>16)))) {
+                       return null; // not a CADI Token                        
+               }
+               return new UUID(msb, lsb);
+       }
+       
+}