--- /dev/null
+/**
+ * ============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;
+
+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;
+ }
+
+ 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();
+ }
+
+ 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) 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;
+ }
+
+ /**
+ * 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) {
+ int c;
+ byte b;
+ byte[] ba;
+ boolean high;
+ int start;
+ if(s.length()%2==0) {
+ ba = new byte[s.length()/2];
+ high=true;
+ start=0;
+ } else {
+ ba = new byte[(s.length()/2)+1];
+ high = false;
+ start=1;
+ }
+ int idx;
+ for(int i=start;i<s.length();++i) {
+ c = s.charAt((i-start));
+ 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;
+ if(high) {
+ ba[idx]=(byte)(b<<4);
+ high = false;
+ } else {
+ ba[idx]|=b;
+ high = true;
+ }
+ }
+ return ba;
+ }
+
+}
Code Review / aaf / authz.git / blobdiff