--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/jdk.crypto.cryptoki/share/classes/sun/security/pkcs11/P11Util.java	Mon Jan 23 11:49:01 2017 -0800
@@ -0,0 +1,182 @@
+/*
+ * Copyright (c) 2003, 2014, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package sun.security.pkcs11;
+
+import java.math.BigInteger;
+import java.security.*;
+
+/**
+ * Collection of static utility methods.
+ *
+ * @author  Andreas Sterbenz
+ * @since   1.5
+ */
+public final class P11Util {
+
+    private static Object LOCK = new Object();
+
+    private static volatile Provider sun, sunRsaSign, sunJce;
+
+    private P11Util() {
+        // empty
+    }
+
+    static Provider getSunProvider() {
+        Provider p = sun;
+        if (p == null) {
+            synchronized (LOCK) {
+                p = getProvider
+                    (sun, "SUN", "sun.security.provider.Sun");
+                sun = p;
+            }
+        }
+        return p;
+    }
+
+    static Provider getSunRsaSignProvider() {
+        Provider p = sunRsaSign;
+        if (p == null) {
+            synchronized (LOCK) {
+                p = getProvider
+                    (sunRsaSign, "SunRsaSign", "sun.security.rsa.SunRsaSign");
+                sunRsaSign = p;
+            }
+        }
+        return p;
+    }
+
+    static Provider getSunJceProvider() {
+        Provider p = sunJce;
+        if (p == null) {
+            synchronized (LOCK) {
+                p = getProvider
+                    (sunJce, "SunJCE", "com.sun.crypto.provider.SunJCE");
+                sunJce = p;
+            }
+        }
+        return p;
+    }
+
+    private static Provider getProvider(Provider p, String providerName,
+            String className) {
+        if (p != null) {
+            return p;
+        }
+        p = Security.getProvider(providerName);
+        if (p == null) {
+            try {
+                @SuppressWarnings("deprecation")
+                Object o = Class.forName(className).newInstance();
+                p = (Provider)o;
+            } catch (Exception e) {
+                throw new ProviderException
+                        ("Could not find provider " + providerName, e);
+            }
+        }
+        return p;
+    }
+
+    static byte[] convert(byte[] input, int offset, int len) {
+        if ((offset == 0) && (len == input.length)) {
+            return input;
+        } else {
+            byte[] t = new byte[len];
+            System.arraycopy(input, offset, t, 0, len);
+            return t;
+        }
+    }
+
+    static byte[] subarray(byte[] b, int ofs, int len) {
+        byte[] out = new byte[len];
+        System.arraycopy(b, ofs, out, 0, len);
+        return out;
+    }
+
+    static byte[] concat(byte[] b1, byte[] b2) {
+        byte[] b = new byte[b1.length + b2.length];
+        System.arraycopy(b1, 0, b, 0, b1.length);
+        System.arraycopy(b2, 0, b, b1.length, b2.length);
+        return b;
+    }
+
+    static long[] concat(long[] b1, long[] b2) {
+        if (b1.length == 0) {
+            return b2;
+        }
+        long[] b = new long[b1.length + b2.length];
+        System.arraycopy(b1, 0, b, 0, b1.length);
+        System.arraycopy(b2, 0, b, b1.length, b2.length);
+        return b;
+    }
+
+    public static byte[] getMagnitude(BigInteger bi) {
+        byte[] b = bi.toByteArray();
+        if ((b.length > 1) && (b[0] == 0)) {
+            int n = b.length - 1;
+            byte[] newarray = new byte[n];
+            System.arraycopy(b, 1, newarray, 0, n);
+            b = newarray;
+        }
+        return b;
+    }
+
+    static byte[] getBytesUTF8(String s) {
+        try {
+            return s.getBytes("UTF8");
+        } catch (java.io.UnsupportedEncodingException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    static byte[] sha1(byte[] data) {
+        try {
+            MessageDigest md = MessageDigest.getInstance("SHA-1");
+            md.update(data);
+            return md.digest();
+        } catch (GeneralSecurityException e) {
+            throw new ProviderException(e);
+        }
+    }
+
+    private final static char[] hexDigits = "0123456789abcdef".toCharArray();
+
+    static String toString(byte[] b) {
+        if (b == null) {
+            return "(null)";
+        }
+        StringBuilder sb = new StringBuilder(b.length * 3);
+        for (int i = 0; i < b.length; i++) {
+            int k = b[i] & 0xff;
+            if (i != 0) {
+                sb.append(':');
+            }
+            sb.append(hexDigits[k >>> 4]);
+            sb.append(hexDigits[k & 0xf]);
+        }
+        return sb.toString();
+    }
+
+}