* Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.

import java.math.BigInteger;

import java.util.regex.Pattern;

import javax.net.ssl.*;

import sun.security.action.GetPropertyAction;

    private static final String indent = "  ";

    private static final Pattern lineBreakPatern =

                Pattern.compile("\\r\\n|\\n|\\r");

                if (SSLLogger.isOn && SSLLogger.isOn("ssl")) {

                     SSLLogger.fine(

                        "the previous server name in SNI (" + serverName +

                if (SSLLogger.isOn && SSLLogger.isOn("ssl")) {

                     SSLLogger.fine(hostname + "\" " +

    /**

     * Return the value of the boolean System property propName.

     *

     * Note use of privileged action. Do NOT make accessible to applications.

     */

    static boolean getBooleanProperty(String propName, boolean defaultValue) {

        // if set, require value of either true or false

        String b = GetPropertyAction.privilegedGetProperty(propName);

        if (b == null) {

            return defaultValue;

        } else if (b.equalsIgnoreCase("false")) {

            return false;

        } else if (b.equalsIgnoreCase("true")) {

            return true;

        } else {

            throw new RuntimeException("Value of " + propName

                + " must either be 'true' or 'false'");

        }

    }

    static String indent(String source) {

        return Utilities.indent(source, indent);

    }

    static String indent(String source, String prefix) {

        StringBuilder builder = new StringBuilder();

        if (source == null) {

             builder.append("\n" + prefix + "<blank message>");

        } else {

            String[] lines = lineBreakPatern.split(source);

            boolean isFirst = true;

            for (String line : lines) {

                if (isFirst) {

                    isFirst = false;

                } else {

                    builder.append("\n");

                }

                builder.append(prefix).append(line);

            }

        }

        return builder.toString();

    }

    static String toHexString(byte b) {

        return String.valueOf(hexDigits[(b >> 4) & 0x0F]) +

                String.valueOf(hexDigits[b & 0x0F]);

    }

    static String byte16HexString(int id) {

        return "0x" +

                hexDigits[(id >> 12) & 0x0F] + hexDigits[(id >> 8) & 0x0F] +

                hexDigits[(id >> 4) & 0x0F] + hexDigits[id & 0x0F];

    }

    static String toHexString(byte[] bytes) {

        if (bytes == null || bytes.length == 0) {

            return "";

        }

        StringBuilder builder = new StringBuilder(bytes.length * 3);

        boolean isFirst = true;

        for (byte b : bytes) {

            if (isFirst) {

                isFirst = false;

            } else {

                builder.append(' ');

            }

            builder.append(hexDigits[(b >> 4) & 0x0F]);

            builder.append(hexDigits[b & 0x0F]);

        }

        return builder.toString();

    }

    static String toHexString(long lv) {

        StringBuilder builder = new StringBuilder(128);

        boolean isFirst = true;

        do {

            if (isFirst) {

                isFirst = false;

            } else {

                builder.append(' ');

            }

            builder.append(hexDigits[(int)(lv & 0x0F)]);

            lv >>>= 4;

            builder.append(hexDigits[(int)(lv & 0x0F)]);

            lv >>>= 4;

        } while (lv != 0);

        builder.reverse();

        return builder.toString();

    }

    /**

     * Utility method to convert a BigInteger to a byte array in unsigned

     * format as needed in the handshake messages. BigInteger uses

     * 2's complement format, i.e. it prepends an extra zero if the MSB

     * is set. We remove that.

     */

    static byte[] toByteArray(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;

    }