annotate ServerMonitor/Objects/Server.cs @ 8:052aa62cb42a

Single instance. Add autorun option. Add icons. General enhancements.
author Brad Greco <brad@bgreco.net>
date Sat, 09 Mar 2019 20:14:03 -0500
parents c1dffaac66fa
children 68d7834dc28e
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1 using System;
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2 using System.Collections.Generic;
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3 using System.Linq;
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4 using System.Text;
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5 using System.Security.Cryptography;
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6 using System.ComponentModel;
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7 using Renci.SshNet;
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8 using System.Runtime.Serialization;
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9 using System.Xml.Serialization;
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10
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11 namespace ServerMonitorApp
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12 {
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13 public enum LoginType { PrivateKey = 0, Password = 1 };
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14
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15 public class Server
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16 {
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17 private string _host;
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18 private int _port;
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19 private string _username;
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20 private LoginType _loginType;
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21 private string _keyFile;
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22 private SshClient _sshClient;
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23 private bool _enabled = true;
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24 private byte[] passwordHash;
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25 private PrivateKeyFile _privateKeyFile;
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26
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27 public event EventHandler CheckModified;
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28 public event EventHandler EnabledChanged;
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29
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30 public readonly BindingList<Check> Checks = new BindingList<Check>();
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31
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32 public int Id { get; set; }
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33
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34 public string Name { get; set; }
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35
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36 public string Host
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37 {
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38 get { return _host; }
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39 set { _host = value; InvalidateSshConnection(); }
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40 }
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41
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42 public int Port
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43 {
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44 get { return _port; }
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45 set { _port = value; InvalidateSshConnection(); }
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46 }
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47
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48 public string Username
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49 {
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50 get { return _username; }
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51 set { _username = value; InvalidateSshConnection(); }
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52 }
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53
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54 public LoginType LoginType
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55 {
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56 get { return _loginType; }
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57 set { _loginType = value; InvalidateSshConnection(); }
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58 }
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59
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60 public string KeyFile
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61 {
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62 get { return _keyFile; }
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63 set { _keyFile = value; InvalidateSshConnection(); }
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64 }
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65
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66 public string Password
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67 {
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68 get {
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69 return passwordHash == null ? null :
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70 Encoding.UTF8.GetString(ProtectedData.Unprotect(passwordHash, Encoding.UTF8.GetBytes("Server".Reverse().ToString()), DataProtectionScope.CurrentUser));
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71 }
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72 set
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73 {
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74 passwordHash = ProtectedData.Protect(Encoding.UTF8.GetBytes(value),
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75 Encoding.UTF8.GetBytes("Server".Reverse().ToString()), // Minor obfuscation of additional entropy
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76 DataProtectionScope.CurrentUser);
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77 }
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78 }
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79
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80 [XmlIgnore]
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81 public PrivateKeyFile PrivateKeyFile
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82 {
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83 get { return _privateKeyFile; }
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84 set
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85 {
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86 _privateKeyFile = value;
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87 if (LoginType == LoginType.PrivateKey)
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88 {
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89 if (_privateKeyFile == null)
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90 {
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91 KeyStatus = KeyStatus.Closed;
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92 Enabled = false;
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93 }
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94 else
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95 {
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96 if (!KeyStatus.In(KeyStatus.Open, KeyStatus.Closed))
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97 Enabled = true;
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98 KeyStatus = KeyStatus.Open;
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99 }
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100 }
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101 }
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102 }
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103
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104 public KeyStatus KeyStatus { get; set; }
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105
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106 public bool Enabled
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107 {
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108 get { return _enabled; }
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109 set
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110 {
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111 if ((LoginType == LoginType.PrivateKey && PrivateKeyFile == null && value == true) || value == _enabled)
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112 return;
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113 _enabled = value;
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114 EnabledChanged?.Invoke(this, new EventArgs());
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115 }
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116 }
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117
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118 //public bool WaitingForUser { get; set; }
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119
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120 public CheckStatus Status => !Enabled ? CheckStatus.Disabled : Checks
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121 .Where(c => c.Enabled)
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122 .Select(c => c.LastRunStatus)
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123 .DefaultIfEmpty(CheckStatus.Success)
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124 .Max();
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125
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126 public SshClient SshClient
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127 {
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128 get
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129 {
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130 if (_sshClient == null)
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131 {
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132 ConnectionInfo info = new ConnectionInfo(Host, Port, Username, GetAuthentication());
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133 _sshClient = new SshClient(info);
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134 }
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135 return _sshClient;
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136 }
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137 }
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138
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139 /*public Server() { }
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140
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141 public Server(Server server)
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142 {
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143 Name = server.Name;
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144 Host = server.Host;
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145 Port = server.Port;
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146 Username = server.Username;
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147 LoginType = server.LoginType;
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148 KeyFile = server.KeyFile;
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149 Enabled = server.Enabled;
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150 }*/
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151
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152 public void DeleteCheck(Check check)
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153 {
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154 Checks.Remove(check);
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155 check.Server = null;
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156 CheckModified?.Invoke(check, new EventArgs());
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157 }
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158
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159 public string Validate()
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160 {
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161 string message = string.Empty;
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162 if (Name.Length == 0)
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163 message += "\"Name\" must not be empty" + Environment.NewLine;
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164 if (Host.Length == 0)
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165 message += "\"Host\" must not be empty" + Environment.NewLine;
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166 return message.Length > 0 ? message : null;
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167 }
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168
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169 public void UpdateCheck(Check check)
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170 {
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171 Check oldCheck = Checks.FirstOrDefault(c => c.Id == check.Id);
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172 if (!ReferenceEquals(check, oldCheck))
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173 {
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174 int index = Checks.IndexOf(oldCheck);
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175 if (index == -1)
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176 Checks.Add(check);
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177 else
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178 Checks[index] = check;
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179 }
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180 CheckModified?.Invoke(check, new EventArgs());
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181 }
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182
4
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183 public bool IsEmpty()
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184 {
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185 return Name.IsNullOrEmpty()
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186 && Host.IsNullOrEmpty()
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187 && Checks.Count == 0;
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188 }
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189
5
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190 private AuthenticationMethod GetAuthentication()
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191 {
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192 if (LoginType == LoginType.Password)
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193 return new PasswordAuthenticationMethod(Username, Password);
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194 else
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195 return new PrivateKeyAuthenticationMethod(Username, PrivateKeyFile);
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196 }
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197
0
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198 private void InvalidateSshConnection()
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199 {
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200 _sshClient?.Dispose();
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201 _sshClient = null;
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202 }
6
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203
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204 public override string ToString()
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205 {
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206 return Name.IsNullOrEmpty() ? Host : Name;
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207 }
0
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208 }
5
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209
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210 public enum KeyStatus
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211 {
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212 Closed,
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213 Open,
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214 NotAccessible,
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215 NeedPassword,
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216 }
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217
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218
0
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219 }