Introduce support for multiple JCR repositories.

[lgpl/argeo-commons.git] / org.argeo.enterprise / src / org / argeo / osgi / useradmin / DigestUtils.java

diff --git a/org.argeo.enterprise/src/org/argeo/osgi/useradmin/DigestUtils.java b/org.argeo.enterprise/src/org/argeo/osgi/useradmin/DigestUtils.java
index d8f8ce9d5d87d018a79684507448d157adcabbd3..51d18349b2a662a762871e9464c5e24370a01c77 100644 (file)
--- a/org.argeo.enterprise/src/org/argeo/osgi/useradmin/DigestUtils.java
+++ b/org.argeo.enterprise/src/org/argeo/osgi/useradmin/DigestUtils.java
@@ -1,7 +1,12 @@
 package org.argeo.osgi.useradmin;
 
+import java.nio.ByteBuffer;
+import java.nio.CharBuffer;
+import java.nio.charset.StandardCharsets;
 import java.security.MessageDigest;
+import java.util.Arrays;
 
+/** Utilities around digests, mostly those related to passwords. */
 class DigestUtils {
        static byte[] sha1(byte[] bytes) {
                try {
@@ -14,7 +19,51 @@ class DigestUtils {
                }
        }
 
-       private DigestUtils() {
+       static char[] bytesToChars(Object obj) {
+               if (obj instanceof char[])
+                       return (char[]) obj;
+               if (!(obj instanceof byte[]))
+                       throw new IllegalArgumentException(obj.getClass() + " is not a byte array");
+               ByteBuffer fromBuffer = ByteBuffer.wrap((byte[]) obj);
+               CharBuffer toBuffer = StandardCharsets.UTF_8.decode(fromBuffer);
+               char[] res = Arrays.copyOfRange(toBuffer.array(), toBuffer.position(), toBuffer.limit());
+               // Arrays.fill(fromBuffer.array(), (byte) 0); // clear sensitive data
+               // Arrays.fill((byte[]) obj, (byte) 0); // clear sensitive data
+               // Arrays.fill(toBuffer.array(), '\u0000'); // clear sensitive data
+               return res;
+       }
+
+       static byte[] charsToBytes(char[] chars) {
+               CharBuffer charBuffer = CharBuffer.wrap(chars);
+               ByteBuffer byteBuffer = StandardCharsets.UTF_8.encode(charBuffer);
+               byte[] bytes = Arrays.copyOfRange(byteBuffer.array(), byteBuffer.position(), byteBuffer.limit());
+               // Arrays.fill(charBuffer.array(), '\u0000'); // clear sensitive data
+               // Arrays.fill(byteBuffer.array(), (byte) 0); // clear sensitive data
+               return bytes;
        }
 
+       static String sha1str(String str) {
+               byte[] hash = sha1(str.getBytes(StandardCharsets.UTF_8));
+               return encodeHexString(hash);
+       }
+
+       final private static char[] hexArray = "0123456789abcdef".toCharArray();
+
+       /**
+        * From
+        * http://stackoverflow.com/questions/9655181/how-to-convert-a-byte-array-to
+        * -a-hex-string-in-java
+        */
+       public static String encodeHexString(byte[] bytes) {
+               char[] hexChars = new char[bytes.length * 2];
+               for (int j = 0; j < bytes.length; j++) {
+                       int v = bytes[j] & 0xFF;
+                       hexChars[j * 2] = hexArray[v >>> 4];
+                       hexChars[j * 2 + 1] = hexArray[v & 0x0F];
+               }
+               return new String(hexChars);
+       }
+
+       private DigestUtils() {
+       }
 }