HMAC256 is used by Syndie

core/java/src/net/i2p/I2PAppContext.java

@@ -687,14 +687,14 @@ public class I2PAppContext {
         }
     }
 
-    /** @deprecated unused */
+    /** @deprecated used only by syndie */
     public HMAC256Generator hmac256() {
         if (!_hmac256Initialized)
             initializeHMAC256();
         return _hmac256;
     }
 
-    /** @deprecated unused */
+    /** @deprecated used only by syndie */
     private void initializeHMAC256() {
         synchronized (this) {
             if (_hmac256 == null) {

core/java/src/net/i2p/crypto/HMAC256Generator.java

@@ -13,9 +13,12 @@ import org.bouncycastle.crypto.macs.I2PHMac;
 /**
  * Calculate the HMAC-SHA256 of a key+message.  All the good stuff occurs
  * in {@link org.bouncycastle.crypto.macs.I2PHMac} and 
- * {@link org.bouncycastle.crypto.digests.MD5Digest}.
+ * {@link net.i2p.crypto.Sha256Standalone}.
  *
- * deprecated unused
+ * This should be compatible with javax.crypto.Mac.getInstance("HmacSHA256")
+ * but that is untested.
+ *
+ * deprecated used only by syndie
  */
 public class HMAC256Generator extends HMACGenerator {
     public HMAC256Generator(I2PAppContext context) { super(context); }