8159035: CTSMode.java test crashed due to unhandled case of cipher length value as 0

Reviewed-by: ascarpino

src/share/classes/com/sun/crypto/provider/CipherBlockChaining.java

 /*
- * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -140,6 +140,9 @@ class CipherBlockChaining extends FeedbackCipher  {
     int encrypt(byte[] plain, int plainOffset, int plainLen,
                 byte[] cipher, int cipherOffset)
     {
+        if (plainLen <= 0) {
+            return plainLen;
+        }
         if ((plainLen % blockSize) != 0) {
             throw new ProviderException("Internal error in input buffering");
         }
@@ -181,6 +184,9 @@ class CipherBlockChaining extends FeedbackCipher  {
     int decrypt(byte[] cipher, int cipherOffset, int cipherLen,
                 byte[] plain, int plainOffset)
     {
+        if (cipherLen <= 0) {
+            return cipherLen;
+        }
         if ((cipherLen % blockSize) != 0) {
             throw new ProviderException("Internal error in input buffering");
         }

src/share/classes/com/sun/crypto/provider/CounterMode.java

 /*
- * Copyright (c) 2002, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2002, 2017, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -170,6 +170,9 @@ final class CounterMode extends FeedbackCipher {
      * are encrypted on demand.
      */
     private int crypt(byte[] in, int inOff, int len, byte[] out, int outOff) {
+        if (len == 0) {
+            return 0;
+        }
         int result = len;
         while (len-- > 0) {
             if (used >= blockSize) {

src/share/classes/sun/nio/cs/ISO_8859_1.java

 /*
- * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -148,6 +148,7 @@ class ISO_8859_1
         private final Surrogate.Parser sgp = new Surrogate.Parser();
 
         // JVM may replace this method with intrinsic code.
+        // don't pass len value <= 0
         private static int encodeISOArray(char[] sa, int sp,
                                           byte[] da, int dp, int len)
         {
@@ -180,7 +181,7 @@ class ISO_8859_1
             int slen = sl - sp;
             int len  = (dlen < slen) ? dlen : slen;
             try {
-                int ret = encodeISOArray(sa, sp, da, dp, len);
+                int ret = (len <= 0) ? 0 : encodeISOArray(sa, sp, da, dp, len);
                 sp = sp + ret;
                 dp = dp + ret;
                 if (ret != len) {
@@ -240,7 +241,8 @@ class ISO_8859_1
             int slen = Math.min(len, dst.length);
             int sl = sp + slen;
             while (sp < sl) {
-                int ret = encodeISOArray(src, sp, dst, dp, slen);
+                int ret =
+                    (slen <= 0) ? 0 : encodeISOArray(src, sp, dst, dp, slen);
                 sp = sp + ret;
                 dp = dp + ret;
                 if (ret != slen) {