1 | <?php |
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2 | /* vim: set expandtab sw=4 ts=4 sts=4: */ |
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3 | /** |
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4 | * Server config checks management |
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5 | * |
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6 | * @package PhpMyAdmin |
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7 | */ |
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8 | declare(strict_types=1); |
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9 | |||
10 | namespace PhpMyAdmin\Config; |
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11 | |||
12 | use PhpMyAdmin\Config\ConfigFile; |
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13 | use PhpMyAdmin\Config\Descriptions; |
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14 | use PhpMyAdmin\Core; |
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15 | use PhpMyAdmin\Sanitize; |
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16 | use PhpMyAdmin\Setup\Index as SetupIndex; |
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17 | use PhpMyAdmin\Url; |
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18 | use PhpMyAdmin\Util; |
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19 | |||
20 | /** |
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21 | * Performs various compatibility, security and consistency checks on current config |
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22 | * |
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23 | * Outputs results to message list, must be called between SetupIndex::messagesBegin() |
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24 | * and SetupIndex::messagesEnd() |
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25 | * |
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26 | * @package PhpMyAdmin |
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27 | */ |
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28 | class ServerConfigChecks |
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29 | { |
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30 | /** |
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31 | * @var ConfigFile configurations being checked |
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32 | */ |
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33 | protected $cfg; |
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34 | |||
35 | /** |
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36 | * Constructor. |
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37 | * |
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38 | * @param ConfigFile $cfg Configuration |
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39 | */ |
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40 | public function __construct(ConfigFile $cfg) |
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41 | { |
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42 | $this->cfg = $cfg; |
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43 | } |
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44 | |||
45 | /** |
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46 | * Perform config checks |
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47 | * |
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48 | * @return void |
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49 | */ |
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50 | public function performConfigChecks() |
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51 | { |
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52 | $blowfishSecret = $this->cfg->get('blowfish_secret'); |
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53 | $blowfishSecretSet = false; |
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54 | $cookieAuthUsed = false; |
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55 | |||
56 | list($cookieAuthUsed, $blowfishSecret, $blowfishSecretSet) |
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57 | = $this->performConfigChecksServers( |
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58 | $cookieAuthUsed, |
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59 | $blowfishSecret, |
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60 | $blowfishSecretSet |
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61 | ); |
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62 | |||
63 | $this->performConfigChecksCookieAuthUsed( |
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64 | $cookieAuthUsed, |
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65 | $blowfishSecretSet, |
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66 | $blowfishSecret |
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67 | ); |
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68 | |||
69 | // |
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70 | // $cfg['AllowArbitraryServer'] |
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71 | // should be disabled |
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72 | // |
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73 | if ($this->cfg->getValue('AllowArbitraryServer')) { |
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74 | $sAllowArbitraryServerWarn = sprintf( |
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75 | __( |
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76 | 'This %soption%s should be disabled as it allows attackers to ' |
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77 | . 'bruteforce login to any MySQL server. If you feel this is necessary, ' |
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78 | . 'use %srestrict login to MySQL server%s or %strusted proxies list%s. ' |
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79 | . 'However, IP-based protection with trusted proxies list may not be ' |
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80 | . 'reliable if your IP belongs to an ISP where thousands of users, ' |
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81 | . 'including you, are connected to.' |
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82 | ), |
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83 | '[a@' . Url::getCommon(['page' => 'form', 'formset' => 'Features']) . '#tab_Security]', |
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84 | '[/a]', |
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85 | '[a@' . Url::getCommon(['page' => 'form', 'formset' => 'Features']) . '#tab_Security]', |
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86 | '[/a]', |
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87 | '[a@' . Url::getCommon(['page' => 'form', 'formset' => 'Features']) . '#tab_Security]', |
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88 | '[/a]' |
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89 | ); |
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90 | SetupIndex::messagesSet( |
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91 | 'notice', |
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92 | 'AllowArbitraryServer', |
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93 | Descriptions::get('AllowArbitraryServer'), |
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94 | Sanitize::sanitize($sAllowArbitraryServerWarn) |
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95 | ); |
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96 | } |
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97 | |||
98 | $this->performConfigChecksLoginCookie(); |
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99 | |||
100 | $sDirectoryNotice = __( |
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101 | 'This value should be double checked to ensure that this directory is ' |
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102 | . 'neither world accessible nor readable or writable by other users on ' |
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103 | . 'your server.' |
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104 | ); |
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105 | |||
106 | // |
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107 | // $cfg['SaveDir'] |
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108 | // should not be world-accessible |
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109 | // |
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110 | if ($this->cfg->getValue('SaveDir') != '') { |
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111 | SetupIndex::messagesSet( |
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112 | 'notice', |
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113 | 'SaveDir', |
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114 | Descriptions::get('SaveDir'), |
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115 | Sanitize::sanitize($sDirectoryNotice) |
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116 | ); |
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117 | } |
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118 | |||
119 | // |
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120 | // $cfg['TempDir'] |
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121 | // should not be world-accessible |
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122 | // |
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123 | if ($this->cfg->getValue('TempDir') != '') { |
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124 | SetupIndex::messagesSet( |
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125 | 'notice', |
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126 | 'TempDir', |
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127 | Descriptions::get('TempDir'), |
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128 | Sanitize::sanitize($sDirectoryNotice) |
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129 | ); |
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130 | } |
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131 | |||
132 | $this->performConfigChecksZips(); |
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133 | } |
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134 | |||
135 | /** |
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136 | * Check config of servers |
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137 | * |
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138 | * @param boolean $cookieAuthUsed Cookie auth is used |
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139 | * @param string $blowfishSecret Blowfish secret |
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140 | * @param boolean $blowfishSecretSet Blowfish secret set |
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141 | * |
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142 | * @return array |
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143 | */ |
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144 | protected function performConfigChecksServers( |
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145 | $cookieAuthUsed, |
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146 | $blowfishSecret, |
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147 | $blowfishSecretSet |
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148 | ) { |
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149 | $serverCnt = $this->cfg->getServerCount(); |
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150 | for ($i = 1; $i <= $serverCnt; $i++) { |
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151 | $cookieAuthServer |
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152 | = ($this->cfg->getValue("Servers/$i/auth_type") == 'cookie'); |
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153 | $cookieAuthUsed |= $cookieAuthServer; |
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154 | $serverName = $this->performConfigChecksServersGetServerName( |
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155 | $this->cfg->getServerName($i), |
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156 | $i |
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157 | ); |
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158 | $serverName = htmlspecialchars($serverName); |
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159 | |||
160 | list($blowfishSecret, $blowfishSecretSet) |
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161 | = $this->performConfigChecksServersSetBlowfishSecret( |
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162 | $blowfishSecret, |
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163 | $cookieAuthServer, |
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164 | $blowfishSecretSet |
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165 | ); |
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166 | |||
167 | // |
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168 | // $cfg['Servers'][$i]['ssl'] |
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169 | // should be enabled if possible |
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170 | // |
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171 | if (!$this->cfg->getValue("Servers/$i/ssl")) { |
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172 | $title = Descriptions::get('Servers/1/ssl') . " ($serverName)"; |
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173 | SetupIndex::messagesSet( |
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174 | 'notice', |
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175 | "Servers/$i/ssl", |
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176 | $title, |
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177 | __( |
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178 | 'You should use SSL connections if your database server ' |
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179 | . 'supports it.' |
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180 | ) |
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181 | ); |
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182 | } |
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183 | $sSecurityInfoMsg = Sanitize::sanitize(sprintf( |
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184 | __( |
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185 | 'If you feel this is necessary, use additional protection settings - ' |
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186 | . '%1$shost authentication%2$s settings and %3$strusted proxies list%4%s. ' |
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187 | . 'However, IP-based protection may not be reliable if your IP belongs ' |
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188 | . 'to an ISP where thousands of users, including you, are connected to.' |
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189 | ), |
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190 | '[a@' . Url::getCommon(['page' => 'servers', 'mode' => 'edit', 'id' => $i]) . '#tab_Server_config]', |
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191 | '[/a]', |
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192 | '[a@' . Url::getCommon(['page' => 'form', 'formset' => 'Features']) . '#tab_Security]', |
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193 | '[/a]' |
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194 | )); |
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195 | |||
196 | // |
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197 | // $cfg['Servers'][$i]['auth_type'] |
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198 | // warn about full user credentials if 'auth_type' is 'config' |
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199 | // |
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200 | if ($this->cfg->getValue("Servers/$i/auth_type") == 'config' |
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201 | && $this->cfg->getValue("Servers/$i/user") != '' |
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202 | && $this->cfg->getValue("Servers/$i/password") != '' |
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203 | ) { |
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204 | $title = Descriptions::get('Servers/1/auth_type') |
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205 | . " ($serverName)"; |
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206 | SetupIndex::messagesSet( |
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207 | 'notice', |
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208 | "Servers/$i/auth_type", |
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209 | $title, |
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210 | Sanitize::sanitize(sprintf( |
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211 | __( |
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212 | 'You set the [kbd]config[/kbd] authentication type and included ' |
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213 | . 'username and password for auto-login, which is not a desirable ' |
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214 | . 'option for live hosts. Anyone who knows or guesses your phpMyAdmin ' |
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215 | . 'URL can directly access your phpMyAdmin panel. Set %1$sauthentication ' |
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216 | . 'type%2$s to [kbd]cookie[/kbd] or [kbd]http[/kbd].' |
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217 | ), |
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218 | '[a@' . Url::getCommon(['page' => 'servers', 'mode' => 'edit', 'id' => $i]) . '#tab_Server]', |
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219 | '[/a]' |
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220 | )) |
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221 | . ' ' . $sSecurityInfoMsg |
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222 | ); |
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223 | } |
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224 | |||
225 | // |
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226 | // $cfg['Servers'][$i]['AllowRoot'] |
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227 | // $cfg['Servers'][$i]['AllowNoPassword'] |
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228 | // serious security flaw |
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229 | // |
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230 | if ($this->cfg->getValue("Servers/$i/AllowRoot") |
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231 | && $this->cfg->getValue("Servers/$i/AllowNoPassword") |
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232 | ) { |
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233 | $title = Descriptions::get('Servers/1/AllowNoPassword') |
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234 | . " ($serverName)"; |
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235 | SetupIndex::messagesSet( |
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236 | 'notice', |
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237 | "Servers/$i/AllowNoPassword", |
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238 | $title, |
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239 | __('You allow for connecting to the server without a password.') |
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240 | . ' ' . $sSecurityInfoMsg |
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241 | ); |
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242 | } |
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243 | } |
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244 | return [$cookieAuthUsed, $blowfishSecret, $blowfishSecretSet]; |
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245 | } |
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246 | |||
247 | /** |
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248 | * Set blowfish secret |
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249 | * |
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250 | * @param string $blowfishSecret Blowfish secret |
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251 | * @param boolean $cookieAuthServer Cookie auth is used |
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252 | * @param boolean $blowfishSecretSet Blowfish secret set |
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253 | * |
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254 | * @return array |
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255 | */ |
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256 | protected function performConfigChecksServersSetBlowfishSecret( |
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257 | $blowfishSecret, |
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258 | $cookieAuthServer, |
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259 | $blowfishSecretSet |
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260 | ) { |
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261 | if ($cookieAuthServer && $blowfishSecret === null) { |
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262 | $blowfishSecretSet = true; |
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263 | $this->cfg->set('blowfish_secret', Util::generateRandom(32)); |
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264 | } |
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265 | return [$blowfishSecret, $blowfishSecretSet]; |
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266 | } |
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267 | |||
268 | /** |
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269 | * Define server name |
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270 | * |
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271 | * @param string $serverName Server name |
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272 | * @param int $serverId Server id |
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273 | * |
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274 | * @return string Server name |
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275 | */ |
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276 | protected function performConfigChecksServersGetServerName( |
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277 | $serverName, |
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278 | $serverId |
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279 | ) { |
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280 | if ($serverName == 'localhost') { |
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281 | $serverName .= " [$serverId]"; |
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282 | return $serverName; |
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283 | } |
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284 | return $serverName; |
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285 | } |
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286 | |||
287 | /** |
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288 | * Perform config checks for zip part. |
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289 | * |
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290 | * @return void |
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291 | */ |
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292 | protected function performConfigChecksZips() |
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293 | { |
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294 | $this->performConfigChecksServerGZipdump(); |
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295 | $this->performConfigChecksServerBZipdump(); |
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296 | $this->performConfigChecksServersZipdump(); |
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297 | } |
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298 | |||
299 | /** |
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300 | * Perform config checks for zip part. |
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301 | * |
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302 | * @return void |
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303 | */ |
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304 | protected function performConfigChecksServersZipdump() |
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305 | { |
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306 | // |
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307 | // $cfg['ZipDump'] |
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308 | // requires zip_open in import |
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309 | // |
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310 | if ($this->cfg->getValue('ZipDump') && !$this->functionExists('zip_open')) { |
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311 | SetupIndex::messagesSet( |
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312 | 'error', |
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313 | 'ZipDump_import', |
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314 | Descriptions::get('ZipDump'), |
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315 | Sanitize::sanitize(sprintf( |
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316 | __( |
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317 | '%sZip decompression%s requires functions (%s) which are unavailable ' |
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318 | . 'on this system.' |
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319 | ), |
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320 | '[a@' . Url::getCommon(['page' => 'form', 'formset' => 'Features']) . '#tab_Import_export]', |
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321 | '[/a]', |
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322 | 'zip_open' |
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323 | )) |
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324 | ); |
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325 | } |
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326 | |||
327 | // |
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328 | // $cfg['ZipDump'] |
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329 | // requires gzcompress in export |
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330 | // |
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331 | if ($this->cfg->getValue('ZipDump') && !$this->functionExists('gzcompress')) { |
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332 | SetupIndex::messagesSet( |
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333 | 'error', |
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334 | 'ZipDump_export', |
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335 | Descriptions::get('ZipDump'), |
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336 | Sanitize::sanitize(sprintf( |
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337 | __( |
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338 | '%sZip compression%s requires functions (%s) which are unavailable on ' |
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339 | . 'this system.' |
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340 | ), |
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341 | '[a@' . Url::getCommon(['page' => 'form', 'formset' => 'Features']) . '#tab_Import_export]', |
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342 | '[/a]', |
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343 | 'gzcompress' |
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344 | )) |
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345 | ); |
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346 | } |
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347 | } |
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348 | |||
349 | /** |
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350 | * Check config of servers |
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351 | * |
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352 | * @param boolean $cookieAuthUsed Cookie auth is used |
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353 | * @param boolean $blowfishSecretSet Blowfish secret set |
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354 | * @param string $blowfishSecret Blowfish secret |
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355 | * |
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356 | * @return array |
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357 | */ |
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358 | protected function performConfigChecksCookieAuthUsed( |
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359 | $cookieAuthUsed, |
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360 | $blowfishSecretSet, |
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361 | $blowfishSecret |
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362 | ) { |
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363 | // |
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364 | // $cfg['blowfish_secret'] |
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365 | // it's required for 'cookie' authentication |
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366 | // |
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367 | if ($cookieAuthUsed) { |
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368 | if ($blowfishSecretSet) { |
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369 | // 'cookie' auth used, blowfish_secret was generated |
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370 | SetupIndex::messagesSet( |
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371 | 'notice', |
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372 | 'blowfish_secret_created', |
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373 | Descriptions::get('blowfish_secret'), |
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374 | Sanitize::sanitize(__( |
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375 | 'You didn\'t have blowfish secret set and have enabled ' |
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376 | . '[kbd]cookie[/kbd] authentication, so a key was automatically ' |
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377 | . 'generated for you. It is used to encrypt cookies; you don\'t need to ' |
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378 | . 'remember it.' |
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379 | )) |
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380 | ); |
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381 | } else { |
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382 | $blowfishWarnings = []; |
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383 | // check length |
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384 | if (strlen($blowfishSecret) < 32) { |
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385 | // too short key |
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386 | $blowfishWarnings[] = __( |
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387 | 'Key is too short, it should have at least 32 characters.' |
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388 | ); |
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389 | } |
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390 | // check used characters |
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391 | $hasDigits = (bool)preg_match('/\d/', $blowfishSecret); |
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392 | $hasChars = (bool)preg_match('/\S/', $blowfishSecret); |
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393 | $hasNonword = (bool)preg_match('/\W/', $blowfishSecret); |
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394 | if (!$hasDigits || !$hasChars || !$hasNonword) { |
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395 | $blowfishWarnings[] = Sanitize::sanitize( |
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396 | __( |
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397 | 'Key should contain letters, numbers [em]and[/em] ' |
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398 | . 'special characters.' |
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399 | ) |
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400 | ); |
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401 | } |
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402 | if (!empty($blowfishWarnings)) { |
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403 | SetupIndex::messagesSet( |
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404 | 'error', |
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405 | 'blowfish_warnings' . count($blowfishWarnings), |
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406 | Descriptions::get('blowfish_secret'), |
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407 | implode('<br />', $blowfishWarnings) |
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408 | ); |
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409 | } |
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410 | } |
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411 | } |
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412 | } |
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413 | |||
414 | /** |
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415 | * Check configuration for login cookie |
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416 | * |
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417 | * @return void |
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418 | */ |
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419 | protected function performConfigChecksLoginCookie() |
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420 | { |
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421 | // |
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422 | // $cfg['LoginCookieValidity'] |
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423 | // value greater than session.gc_maxlifetime will cause |
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424 | // random session invalidation after that time |
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425 | $loginCookieValidity = $this->cfg->getValue('LoginCookieValidity'); |
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426 | if ($loginCookieValidity > ini_get('session.gc_maxlifetime') |
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427 | ) { |
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428 | SetupIndex::messagesSet( |
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429 | 'error', |
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430 | 'LoginCookieValidity', |
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431 | Descriptions::get('LoginCookieValidity'), |
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432 | Sanitize::sanitize(sprintf( |
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433 | __( |
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434 | '%1$sLogin cookie validity%2$s greater than %3$ssession.gc_maxlifetime%4$s may ' |
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435 | . 'cause random session invalidation (currently session.gc_maxlifetime ' |
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436 | . 'is %5$d).' |
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437 | ), |
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438 | '[a@' . Url::getCommon(['page' => 'form', 'formset' => 'Features']) . '#tab_Security]', |
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439 | '[/a]', |
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440 | '[a@' . Core::getPHPDocLink('session.configuration.php#ini.session.gc-maxlifetime') . ']', |
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441 | '[/a]', |
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442 | ini_get('session.gc_maxlifetime') |
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443 | )) |
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444 | ); |
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445 | } |
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446 | |||
447 | // |
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448 | // $cfg['LoginCookieValidity'] |
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449 | // should be at most 1800 (30 min) |
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450 | // |
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451 | if ($loginCookieValidity > 1800) { |
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452 | SetupIndex::messagesSet( |
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453 | 'notice', |
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454 | 'LoginCookieValidity', |
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455 | Descriptions::get('LoginCookieValidity'), |
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456 | Sanitize::sanitize(sprintf( |
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457 | __( |
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458 | '%sLogin cookie validity%s should be set to 1800 seconds (30 minutes) ' |
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459 | . 'at most. Values larger than 1800 may pose a security risk such as ' |
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460 | . 'impersonation.' |
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461 | ), |
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462 | '[a@' . Url::getCommon(['page' => 'form', 'formset' => 'Features']) . '#tab_Security]', |
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463 | '[/a]' |
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464 | )) |
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465 | ); |
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466 | } |
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467 | |||
468 | // |
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469 | // $cfg['LoginCookieValidity'] |
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470 | // $cfg['LoginCookieStore'] |
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471 | // LoginCookieValidity must be less or equal to LoginCookieStore |
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472 | // |
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473 | if (($this->cfg->getValue('LoginCookieStore') != 0) |
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474 | && ($loginCookieValidity > $this->cfg->getValue('LoginCookieStore')) |
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475 | ) { |
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476 | SetupIndex::messagesSet( |
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477 | 'error', |
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478 | 'LoginCookieValidity', |
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479 | Descriptions::get('LoginCookieValidity'), |
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480 | Sanitize::sanitize(sprintf( |
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481 | __( |
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482 | 'If using [kbd]cookie[/kbd] authentication and %sLogin cookie store%s ' |
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483 | . 'is not 0, %sLogin cookie validity%s must be set to a value less or ' |
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484 | . 'equal to it.' |
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485 | ), |
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486 | '[a@' . Url::getCommon(['page' => 'form', 'formset' => 'Features']) . '#tab_Security]', |
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487 | '[/a]', |
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488 | '[a@' . Url::getCommon(['page' => 'form', 'formset' => 'Features']) . '#tab_Security]', |
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489 | '[/a]' |
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490 | )) |
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491 | ); |
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492 | } |
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493 | } |
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494 | |||
495 | /** |
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496 | * Check GZipDump configuration |
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497 | * |
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498 | * @return void |
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499 | */ |
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500 | protected function performConfigChecksServerBZipdump() |
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501 | { |
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502 | // |
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503 | // $cfg['BZipDump'] |
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504 | // requires bzip2 functions |
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505 | // |
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506 | if ($this->cfg->getValue('BZipDump') |
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507 | && (!$this->functionExists('bzopen') || !$this->functionExists('bzcompress')) |
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508 | ) { |
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509 | $functions = $this->functionExists('bzopen') |
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510 | ? '' : |
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511 | 'bzopen'; |
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512 | $functions .= $this->functionExists('bzcompress') |
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513 | ? '' |
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514 | : ($functions ? ', ' : '') . 'bzcompress'; |
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515 | SetupIndex::messagesSet( |
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516 | 'error', |
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517 | 'BZipDump', |
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518 | Descriptions::get('BZipDump'), |
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519 | Sanitize::sanitize( |
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520 | sprintf( |
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521 | __( |
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522 | '%1$sBzip2 compression and decompression%2$s requires functions (%3$s) which ' |
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523 | . 'are unavailable on this system.' |
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524 | ), |
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525 | '[a@' . Url::getCommon(['page' => 'form', 'formset' => 'Features']) . '#tab_Import_export]', |
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526 | '[/a]', |
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527 | $functions |
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528 | ) |
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529 | ) |
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530 | ); |
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531 | } |
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532 | } |
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533 | |||
534 | /** |
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535 | * Check GZipDump configuration |
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536 | * |
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537 | * @return void |
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538 | */ |
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539 | protected function performConfigChecksServerGZipdump() |
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540 | { |
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541 | // |
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542 | // $cfg['GZipDump'] |
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543 | // requires zlib functions |
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544 | // |
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545 | if ($this->cfg->getValue('GZipDump') |
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546 | && (!$this->functionExists('gzopen') || !$this->functionExists('gzencode')) |
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547 | ) { |
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548 | SetupIndex::messagesSet( |
||
549 | 'error', |
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550 | 'GZipDump', |
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551 | Descriptions::get('GZipDump'), |
||
552 | Sanitize::sanitize(sprintf( |
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553 | __( |
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554 | '%1$sGZip compression and decompression%2$s requires functions (%3$s) which ' |
||
555 | . 'are unavailable on this system.' |
||
556 | ), |
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557 | '[a@' . Url::getCommon(['page' => 'form', 'formset' => 'Features']) . '#tab_Import_export]', |
||
558 | '[/a]', |
||
559 | 'gzencode' |
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560 | )) |
||
561 | ); |
||
562 | } |
||
563 | } |
||
564 | |||
565 | /** |
||
566 | * Wrapper around function_exists to allow mock in test |
||
567 | * |
||
568 | * @param string $name Function name |
||
569 | * |
||
570 | * @return boolean |
||
571 | */ |
||
572 | protected function functionExists($name) |
||
573 | { |
||
574 | return function_exists($name); |
||
575 | } |
||
576 | } |
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577 |