1 files changed, 266 insertions, 0 deletions
diff --git a/cadi/core/src/main/java/org/onap/ccsdk/apps/cadi/Hash.java b/cadi/core/src/main/java/org/onap/ccsdk/apps/cadi/Hash.java
new file mode 100644
index 00000000..09cf2de2
--- /dev/null
+++ b/cadi/core/src/main/java/org/onap/ccsdk/apps/cadi/Hash.java
@@ -0,0 +1,266 @@
+/**
+ * ============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.nio.ByteBuffer;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+/**
+ * 
+ * 
+ *
+ */
+public class Hash {
+    private static char hexDigit[] = "0123456789abcdef".toCharArray();
+
+/////////////////////////////////
+// MD5
+/////////////////////////////////
+    /**
+     * Encrypt MD5 from Byte Array to Byte Array
+     * @param input
+     * @return
+     * @throws NoSuchAlgorithmException
+     */
+    public static byte[] hashMD5 (byte[] input) throws NoSuchAlgorithmException {
+        // Note: Protect against Multi-thread issues with new MessageDigest
+        MessageDigest md = MessageDigest.getInstance("MD5");
+        md.update(input);
+        return md.digest();
+    }
+
+    /**
+     * Encrypt MD5 from Byte Array to Byte Array
+     * @param input
+     * @return
+     * @throws NoSuchAlgorithmException
+     */
+    public static byte[] hashMD5 (byte[] input, int offset, int length) throws NoSuchAlgorithmException {
+        // Note: Protect against Multi-thread issues with new MessageDigest
+        MessageDigest md = MessageDigest.getInstance("MD5");
+        md.update(input,offset,length);
+        return md.digest();
+    }
+
+
+
+    /**
+     * Convenience Function: Encrypt MD5 from String to String Hex representation
+     *
+     * @param input
+     * @return
+     * @throws NoSuchAlgorithmException
+     */
+    public static String hashMD5asStringHex(String input) throws NoSuchAlgorithmException {
+        byte[] output = hashMD5(input.getBytes());
+        StringBuilder sb = new StringBuilder("0x");
+         for (byte b : output) {
+            sb.append(hexDigit[(b >> 4) & 0x0f]);
+            sb.append(hexDigit[b & 0x0f]);
+         }
+         return sb.toString();
+    }
+
+/////////////////////////////////
+// SHA256
+/////////////////////////////////
+    /**
+     * SHA256 Hashing
+     */
+    public static byte[] hashSHA256(byte[] input) throws NoSuchAlgorithmException {
+        // Note: Protect against Multi-thread issues with new MessageDigest
+        MessageDigest md = MessageDigest.getInstance("SHA-256");
+        md.update(input);
+        return md.digest();
+    }
+
+    /**
+     * SHA256 Hashing
+     */
+    public static byte[] hashSHA256(byte[] input, int offset, int length) throws NoSuchAlgorithmException {
+        // Note: Protect against Multi-thread issues with new MessageDigest
+        MessageDigest md = MessageDigest.getInstance("SHA-256");
+        md.update(input,offset,length);
+        return md.digest();
+    }
+
+    /**
+     * Convenience Function: Hash from String to String Hex representation
+     *
+     * @param input
+     * @return
+     * @throws NoSuchAlgorithmException
+     */
+    public static String hashSHA256asStringHex(String input) throws NoSuchAlgorithmException {
+        return toHex(hashSHA256(input.getBytes()));
+    }
+
+    /**
+     * Convenience Function: Hash from String to String Hex representation
+     *
+     * @param input
+     * @return
+     * @throws NoSuchAlgorithmException
+     */
+    public static String hashSHA256asStringHex(String input, int salt) throws NoSuchAlgorithmException {
+        byte[] in = input.getBytes();
+        ByteBuffer bb = ByteBuffer.allocate(Integer.SIZE + in.length);
+        bb.putInt(salt);
+        bb.put(input.getBytes());
+        return toHex(Hash.hashSHA256(bb.array()));
+    }
+
+    /**
+     * Compare two byte arrays for equivalency
+     * @param ba1
+     * @param ba2
+     * @return
+     */
+    public static boolean isEqual(byte ba1[], byte ba2[]) {
+        if (ba1.length!=ba2.length)return false;
+        for (int i = 0;i<ba1.length; ++i) {
+            if (ba1[i]!=ba2[i])return false;
+        }
+        return true;
+    }
+
+    public static int compareTo(byte[] a, byte[] b) {
+        int end = Math.min(a.length, b.length);
+        int compare = 0;
+        for (int i=0;compare == 0 && i<end;++i) {
+            compare = a[i]-b[i];
+        }
+        if (compare==0)compare=a.length-b.length;
+        return compare;
+    }
+
+    /**
+     * @param ba
+     * @return
+     */
+    public static String toHexNo0x(byte[] ba) {
+        StringBuilder sb = new StringBuilder();
+         for (byte b : ba) {
+            sb.append(hexDigit[(b >> 4) & 0x0f]);
+            sb.append(hexDigit[b & 0x0f]);
+         }
+         return sb.toString();
+    }
+
+    /**
+     * @param ba
+     * @return
+     */
+    public static String toHex(byte[] ba) {
+        StringBuilder sb = new StringBuilder("0x");
+         for (byte b : ba) {
+            sb.append(hexDigit[(b >> 4) & 0x0f]);
+            sb.append(hexDigit[b & 0x0f]);
+         }
+         return sb.toString();
+    }
+
+    public static String toHex(byte[] ba, int start, int length) {
+        StringBuilder sb = new StringBuilder("0x");
+         for (int i=start;i<length;++i) {
+            sb.append(hexDigit[(ba[i] >> 4) & 0x0f]);
+            sb.append(hexDigit[ba[i] & 0x0f]);
+         }
+         return sb.toString();
+    }
+
+
+    public static byte[] fromHex(String s) {
+    	if(!s.startsWith("0x")) {
+    		return fromHexNo0x(s);
+    	}
+        byte b;
+        int c;
+        byte[] ba;
+        int extra = s.length()%2; // odd requires extra
+        ba = new byte[(s.length()-2)/2 + extra];
+        boolean high = extra==0;
+        
+        int idx;
+        for (int i=2;i<s.length();++i) {
+            c = s.charAt(i);
+            if (c>=0x30 && c<=0x39) {
+                b=(byte)(c-0x30);
+            } else if (c>=0x61 && c<=0x66) {
+                b=(byte)(c-0x57);  // account for "A"
+            } else if (c>=0x41 && c<=0x46) {
+                b=(byte)(c-0x37);
+            } else {
+                return null;
+            }
+            idx = (i-2+extra)/2;
+            if (high) {
+                ba[idx]=(byte)(b<<4);
+                high = false;
+            } else {
+                ba[idx]|=b;
+                high = true;
+            }
+        }
+        return ba;
+    }
+    
+    /**
+     * Does not expect to start with "0x"
+     * if Any Character doesn't match, it returns null;
+     *
+     * @param s
+     * @return
+     */
+    public static byte[] fromHexNo0x(String s) {
+        byte b;
+        int c;
+        byte[] ba;
+        int extra = s.length()%2; // odd requires extra byte to store
+        ba = new byte[(s.length())/2 + extra];
+        boolean high = extra==0;
+        
+        int idx;
+        for (int i=0;i<s.length();++i) {
+            c = s.charAt(i);
+            if (c>=0x30 && c<=0x39) {
+                b=(byte)(c-0x30);
+            } else if (c>=0x61 && c<=0x66) {
+                b=(byte)(c-0x57);  // account for "A"
+            } else if (c>=0x41 && c<=0x46) {
+                b=(byte)(c-0x37);
+            } else {
+                return null;
+            }
+            idx = (i+extra)/2;
+            if (high) {
+                ba[idx]=(byte)(b<<4);
+                high = false;
+            } else {
+                ba[idx]|=b;
+                high = true;
+            }
+        }
+        return ba;
+    }
+}