--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/src/main/java/ch/ethz/ssh2/crypto/digest/SHA256.java	Thu Dec 03 11:23:55 2015 -0800
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2006-2011 Christian Plattner. All rights reserved.
+ * Please refer to the LICENSE.txt for licensing details.
+ */
+package ch.ethz.ssh2.crypto.digest;
+
+import java.security.DigestException;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+/**
+ * @version $Id: SHA256.java 152 2014-04-28 11:02:23Z dkocher@sudo.ch $
+ */
+public final class SHA256 implements Digest {
+
+    private MessageDigest md;
+
+    public SHA256() {
+        try {
+            md = MessageDigest.getInstance("SHA-256");
+        }
+        catch (NoSuchAlgorithmException e) {
+            throw new IllegalArgumentException(e);
+        }
+    }
+
+    public final int getDigestLength() {
+        return md.getDigestLength();
+    }
+
+    public final void reset() {
+        md.reset();
+    }
+
+    public final void update(byte b[]) {
+        this.update(b, 0, b.length);
+    }
+
+    public final void update(byte b[], int off, int len) {
+        md.update(b, off, len);
+    }
+
+    public final void update(byte b) {
+        md.update(b);
+    }
+
+    public final void digest(byte[] out) throws DigestException {
+        this.digest(out, 0);
+    }
+
+    public final void digest(byte[] out, int off) throws DigestException {
+        md.digest(out, off, out.length);
+    }
+}