Mercurial > 510Connectbot

annotate src/org/tn5250j/framework/transport/SSL/SSLImplementation.java @ 131:adf9ca45675b

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author Carl Byington <carl@five-ten-sg.com>
date Thu, 19 Jun 2014 09:57:31 -0700
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1 package org.tn5250j.framework.transport.SSL;
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2
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3 /*
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4 * @(#)SSLImplementation.java
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5 * @author Stephen M. Kennedy
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6 *
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7 * Copyright: Copyright (c) 2001
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8 *
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9 * This program is free software; you can redistribute it and/or modify
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10 * it under the terms of the GNU General Public License as published by
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11 * the Free Software Foundation; either version 2, or (at your option)
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12 * any later version.
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13 *
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14 * This program is distributed in the hope that it will be useful,
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15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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17 * GNU General Public License for more details.
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18 *
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19 * You should have received a copy of the GNU General Public License
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20 * along with this software; see the file COPYING. If not, write to
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21 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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22 * Boston, MA 02111-1307 USA
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23 *
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24 */
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25
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26 import java.io.File;
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27 import java.io.FileInputStream;
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28 import java.io.FileOutputStream;
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29 import java.net.Socket;
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30 import java.security.KeyStore;
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31 import java.security.cert.CertificateException;
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32 import java.security.cert.X509Certificate;
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34 import javax.net.ssl.KeyManagerFactory;
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35 import javax.net.ssl.SSLContext;
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36 import javax.net.ssl.SSLSocket;
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37 import javax.net.ssl.TrustManager;
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38 import javax.net.ssl.TrustManagerFactory;
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39 import javax.net.ssl.X509TrustManager;
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40
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41 import com.five_ten_sg.connectbot.R;
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42 import com.five_ten_sg.connectbot.service.TerminalBridge;
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43 import com.five_ten_sg.connectbot.service.TerminalManager;
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45 import org.tn5250j.framework.transport.SSLInterface;
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46 import android.util.Log;
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47
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48
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49 /**
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50 * <p>
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51 * This class implements the SSLInterface and is used to create SSL socket
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52 * instances.
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53 * </p>
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54 *
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55 * @author Stephen M. Kennedy <skennedy@tenthpowertech.com>
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56 *
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57 */
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58 public class SSLImplementation implements SSLInterface, X509TrustManager {
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59 private static final String TAG = "SSLImplementation";
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60 SSLContext sslContext = null;
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61 KeyStore userks = null;
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62 private String userKsPath;
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63 private char[] userksPassword = "changeit".toCharArray();
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64
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65 TerminalBridge bridge = null;
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66 TerminalManager manager = null;
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67 String target = null; // destination:port
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68
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69 KeyManagerFactory userkmf = null;
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71 TrustManagerFactory usertmf = null;
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73 TrustManager[] userTrustManagers = null;
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75 X509Certificate[] acceptedIssuers;
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77 public SSLImplementation(TerminalBridge bridge, TerminalManager manager) {
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78 this.bridge = bridge;
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79 this.manager = manager;
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80 }
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81
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82 public void init(String sslType, String homeDirectory) {
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83 try {
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84 Log.d(TAG, "Initializing User KeyStore");
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85 userKsPath = homeDirectory + File.separator + "keystore";
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86 File userKsFile = new File(userKsPath);
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87 userks = KeyStore.getInstance(KeyStore.getDefaultType());
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88 userks.load(userKsFile.exists() ? new FileInputStream(userKsFile)
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89 : null, userksPassword);
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90 Log.d(TAG, "Initializing User Key Manager Factory");
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91 userkmf = KeyManagerFactory.getInstance(KeyManagerFactory
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92 .getDefaultAlgorithm());
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93 userkmf.init(userks, userksPassword);
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94 Log.d(TAG, "Initializing User Trust Manager Factory");
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95 usertmf = TrustManagerFactory.getInstance(TrustManagerFactory
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96 .getDefaultAlgorithm());
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97 usertmf.init(userks);
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98 userTrustManagers = usertmf.getTrustManagers();
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99 Log.d(TAG, "Initializing SSL Context");
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100 sslContext = SSLContext.getInstance(sslType);
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101 sslContext.init(userkmf.getKeyManagers(), new TrustManager[] {this}, null);
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102 }
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103 catch (Exception ex) {
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104 Log.e(TAG, "Error initializing SSL [" + ex.getMessage() + "]");
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105 }
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106 }
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107
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108 public Socket createSSLSocket(String destination, int port) {
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109 if (sslContext == null)
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110 throw new IllegalStateException("SSL Context Not Initialized");
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112 SSLSocket socket = null;
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113
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114 try {
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115 target = destination + ":" + String.valueOf(port);
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116 socket = (SSLSocket) sslContext.getSocketFactory().createSocket(
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117 destination, port);
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118 }
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119 catch (Exception e) {
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120 Log.e(TAG, "Error creating ssl socket [" + e.getMessage() + "]");
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121 }
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122
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123 return socket;
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124 }
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125
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126 // X509TrustManager Methods
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128 /*
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129 * (non-Javadoc)
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130 *
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131 * @see javax.net.ssl.X509TrustManager#getAcceptedIssuers()
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132 */
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133 public X509Certificate[] getAcceptedIssuers() {
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134 return acceptedIssuers;
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135 }
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136
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137 /*
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138 * (non-Javadoc)
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139 *
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140 * @see
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141 * javax.net.ssl.X509TrustManager#checkClientTrusted(java.security.cert.
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142 * X509Certificate[], java.lang.String)
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143 */
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144 public void checkClientTrusted(X509Certificate[] arg0, String arg1)
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145 throws CertificateException {
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146 throw new SecurityException("checkClientTrusted unsupported");
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147 }
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148
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149 /*
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150 * (non-Javadoc)
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151 *
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152 * @see
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153 * javax.net.ssl.X509TrustManager#checkServerTrusted(java.security.cert.
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154 * X509Certificate[], java.lang.String)
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155 */
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156 public void checkServerTrusted(X509Certificate[] chain, String type)
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157 throws CertificateException {
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158 try {
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159 for (int i = 0; i < userTrustManagers.length; i++) {
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160 if (userTrustManagers[i] instanceof X509TrustManager) {
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161 X509TrustManager trustManager = (X509TrustManager) userTrustManagers[i];
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162 X509Certificate[] calist = trustManager
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163 .getAcceptedIssuers();
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164
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165 if (calist.length > 0) {
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166 trustManager.checkServerTrusted(chain, type);
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167 }
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168 else {
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169 throw new CertificateException(
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170 "Empty list of accepted issuers (a.k.a. root CA list).");
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171 }
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172 }
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173 }
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174
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175 return;
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176 }
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177 catch (CertificateException ce) {
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178 X509Certificate cert = chain[0];
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179 String certInfo = manager.res.getString(R.string.host_cert_version) + cert.getVersion() + "\r\n";
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180 certInfo = certInfo.concat(manager.res.getString(R.string.host_cert_serial) + cert.getSerialNumber() + "\r\n");
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181 certInfo = certInfo.concat(manager.res.getString(R.string.host_cert_algorithm) + cert.getSigAlgName() + "\r\n");
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182 certInfo = certInfo.concat(manager.res.getString(R.string.host_cert_issuer) + cert.getIssuerDN().getName() + "\r\n");
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183 certInfo = certInfo.concat(manager.res.getString(R.string.host_cert_from) + cert.getNotBefore() + "\r\n");
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184 certInfo = certInfo.concat(manager.res.getString(R.string.host_cert_to) + cert.getNotAfter() + "\r\n");
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185 certInfo = certInfo.concat(manager.res.getString(R.string.host_cert_dn) + cert.getSubjectDN().getName() + "\r\n");
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186 certInfo = certInfo.concat(manager.res.getString(R.string.host_cert_publickey) + cert.getPublicKey().getFormat() + "\r\n");
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187 bridge.outputLine(manager.res.getString(R.string.host_authenticity_warning, target));
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188 bridge.outputLine(manager.res.getString(R.string.host_certificate, certInfo));
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189 Boolean result = bridge.promptHelper.requestBooleanPrompt(null, manager.res.getString(R.string.prompt_accept_certificate));
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190
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191 if ((result == null) || (!result.booleanValue())) {
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192 throw new java.security.cert.CertificateException(
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193 "Certificate Rejected");
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194 }
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195
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196 result = bridge.promptHelper.requestBooleanPrompt(null, manager.res.getString(R.string.prompt_save_certificate));
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197
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198 if ((result != null) && (result.booleanValue())) {
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199 try {
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200 userks.setCertificateEntry(cert.getSubjectDN().getName(),
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201 cert);
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202 userks.store(new FileOutputStream(userKsPath),
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203 userksPassword);
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204 }
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205 catch (Exception e) {
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206 Log.e(TAG, "Error saving certificate [" + e.getMessage()
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207 + "]");
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208 e.printStackTrace();
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209 }
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210 }
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211 }
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212 }
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213 }