diff options
Diffstat (limited to 'core/src/main/java/org/onap/aaf/cadi/Hash.java')
| -rw-r--r-- | core/src/main/java/org/onap/aaf/cadi/Hash.java | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/core/src/main/java/org/onap/aaf/cadi/Hash.java b/core/src/main/java/org/onap/aaf/cadi/Hash.java new file mode 100644 index 0000000..9d8719a --- /dev/null +++ b/core/src/main/java/org/onap/aaf/cadi/Hash.java @@ -0,0 +1,202 @@ +/*******************************************************************************
+ * ============LICENSE_START====================================================
+ * * org.onap.aaf
+ * * ===========================================================================
+ * * Copyright © 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====================================================
+ * *
+ * * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ * *
+ ******************************************************************************/
+package org.onap.aaf.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[] encryptMD5 (byte[] input) throws NoSuchAlgorithmException {
+ 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[] encryptMD5 (byte[] input, int offset, int length) throws NoSuchAlgorithmException {
+ 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 encryptMD5asStringHex(String input) throws NoSuchAlgorithmException {
+ byte[] output = encryptMD5(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 {
+ 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 {
+ 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 {
+ byte[] output = hashSHA256(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();
+ }
+
+ /**
+ * 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());
+ byte[] output = Hash.hashSHA256(bb.array());
+ StringBuilder sb = new StringBuilder("0x");
+ for (byte b : output) {
+ sb.append(hexDigit[(b >> 4) & 0x0f]);
+ sb.append(hexDigit[b & 0x0f]);
+ }
+ return sb.toString();
+ }
+
+ /**
+ * 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;
+ }
+
+ 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 byte[] fromHex(String s) throws CadiException{
+ if(!s.startsWith("0x")) {
+ throw new CadiException("HexString must start with \"0x\"");
+ }
+ boolean high = true;
+ int c;
+ byte b;
+ byte[] ba = new byte[(s.length()-2)/2];
+ 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 {
+ throw new CadiException("Invalid char '" + c + "' in HexString");
+ }
+ idx = (i-2)/2;
+ if(high) {
+ ba[idx]=(byte)(b<<4);
+ high = false;
+ } else {
+ ba[idx]|=b;
+ high = true;
+ }
+ }
+ return ba;
+ }
+
+}
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