jdk/src/java.base/share/classes/sun/security/ssl/RandomCookie.java
author ascarpino
Wed, 08 Feb 2017 12:08:28 -0800
changeset 43701 fe8c324ba97c
parent 38463 9cc68bcd7993
permissions -rw-r--r--
8160655: Fix denyAfter and usage types for security properties Reviewed-by: mullan, xuelei
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/*
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 * Copyright (c) 1996, 2016, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.  Oracle designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Oracle in the LICENSE file that accompanied this code.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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package sun.security.ssl;
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import java.io.*;
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import java.security.SecureRandom;
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/*
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 * RandomCookie ... SSL hands standard format random cookies (nonces)
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 * around.  These know how to encode/decode themselves on SSL streams,
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 * and can be created and printed.
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 *
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 * @author David Brownell
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 */
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final class RandomCookie {
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    byte[] random_bytes;  // exactly 32 bytes
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    RandomCookie(SecureRandom generator) {
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        random_bytes = new byte[32];
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        generator.nextBytes(random_bytes);
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    }
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    RandomCookie(HandshakeInStream m) throws IOException {
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        random_bytes = new byte[32];
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        m.read(random_bytes, 0, 32);
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    }
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    void send(HandshakeOutStream out) throws IOException {
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        out.write(random_bytes, 0, 32);
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    }
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    void print(PrintStream s) {
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        s.print("random_bytes = {");
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        for (int i = 0; i < 32; i++) {
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            int k = random_bytes[i] & 0xFF;
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            if (i != 0) {
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                s.print(' ');
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            }
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            s.print(Utilities.hexDigits[k >>> 4]);
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            s.print(Utilities.hexDigits[k & 0xf]);
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        }
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        s.println("}");
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    }
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}