This project does not seem to handle request data directly as such no vulnerable execution paths were found.
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, or for example
via PHP's auto-loading mechanism.
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1 | <?php |
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2 | |||
3 | namespace iqb\stream; |
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4 | |||
5 | /** |
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6 | * A SubStream wraps another stream and provides access to a portion of that stream. |
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7 | * A SubStream is read only. |
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8 | * The wrapped stream/resource must be seekable for SubStream to work. |
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9 | * |
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10 | * The URL schema is: fopen("iqb.substream://$startindex:$length/$resourceId") |
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11 | */ |
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12 | final class SubStream |
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13 | { |
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14 | /** |
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15 | * @var resource |
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16 | */ |
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17 | public $context; |
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18 | |||
19 | /** |
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20 | * @var resource |
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21 | */ |
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22 | private $handle; |
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23 | |||
24 | /** |
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25 | * @var int |
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26 | */ |
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27 | private $enforceOffsetMin; |
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28 | |||
29 | /** |
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30 | * @var int |
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31 | */ |
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32 | private $enforceOffsetMax; |
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33 | |||
34 | /** |
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35 | * Current offset |
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36 | * @var int |
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37 | */ |
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38 | private $offset = 0; |
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39 | |||
40 | |||
41 | public function stream_close() |
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42 | { |
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43 | } |
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44 | |||
45 | |||
46 | public function stream_eof() |
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47 | { |
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48 | return ($this->offset >= $this->enforceOffsetMax); |
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49 | } |
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50 | |||
51 | |||
52 | public function stream_open(string $path, string $mode, int $options) |
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0 ignored issues
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53 | { |
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54 | $errors = ($options & \STREAM_REPORT_ERRORS); |
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55 | $parts = \parse_url($path); |
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56 | |||
57 | if (!isset($parts['scheme']) || $parts['scheme'] !== SUBSTREAM_SCHEME) { |
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58 | $errors && \trigger_error("Invalid URL scheme.", \E_USER_ERROR); |
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59 | return false; |
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60 | } |
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61 | |||
62 | View Code Duplication | if (!isset($parts['host']) || !\is_numeric($parts['host'])) { |
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63 | $errors && \trigger_error("Invalid start offset.", \E_USER_ERROR); |
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64 | return false; |
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65 | } else { |
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66 | $offset = \intval($parts['host']); |
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67 | } |
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68 | |||
69 | View Code Duplication | if (!isset($parts['port']) || !\is_numeric($parts['port'])) { |
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70 | $errors && \trigger_error("Invalid length.", \E_USER_ERROR); |
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71 | return false; |
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72 | } else { |
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73 | $length = \intval($parts['port']); |
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74 | } |
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75 | |||
76 | if (!isset($parts['path']) || !\is_numeric(\substr($parts['path'], 1))) { |
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77 | $errors && \trigger_error("Invalid resource to wrap.", \E_USER_ERROR); |
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78 | return false; |
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79 | } else { |
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80 | $resourceId = \intval(\substr($parts['path'], 1)); |
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81 | } |
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82 | |||
83 | if (\function_exists('\get_resources')) { |
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84 | $resources = \get_resources('stream'); |
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85 | if (isset($resources[$resourceId])) { |
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86 | $originalResource = $resources[$resourceId]; |
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87 | $meta = \stream_get_meta_data($originalResource); |
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88 | |||
89 | if (!isset($meta['seekable']) || !$meta['seekable']) { |
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90 | $errors && \trigger_error("Can only wrap seekable resources.", \E_USER_ERROR); |
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91 | return false; |
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92 | } |
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93 | |||
94 | if ($meta['wrapper_type'] === 'PHP' && $meta['stream_type'] === 'MEMORY') { |
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95 | $oldStreamPosition = \ftell($originalResource); |
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96 | $resource = \fopen($meta['uri'], 'w+b'); |
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97 | \fseek($originalResource, $this->enforceOffsetMin); |
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98 | \stream_copy_to_stream($originalResource, $resource, $length, $offset); |
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99 | $this->enforceOffsetMin = $this->offset = 0; |
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100 | $this->enforceOffsetMax = $length; |
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101 | \fseek($originalResource, $oldStreamPosition); |
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102 | } |
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103 | |||
104 | else { |
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105 | $this->enforceOffsetMin = $this->offset = $offset; |
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106 | $this->enforceOffsetMax = $offset + $length; |
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107 | $resource = \fopen($meta['uri'], 'r'); |
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108 | } |
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109 | } |
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110 | } |
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111 | |||
112 | if (!isset($resource)) { |
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113 | $errors && \trigger_error("Resource not available.", \E_USER_ERROR); |
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114 | return false; |
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115 | } |
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116 | |||
117 | $this->handle = $resource; |
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118 | return true; |
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119 | } |
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120 | |||
121 | |||
122 | public function stream_read(int $count) |
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123 | { |
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124 | $realCount = \min($count, $this->enforceOffsetMax - $this->offset); |
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125 | |||
126 | if ($realCount > 0) { |
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127 | \fseek($this->handle, $this->offset); |
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128 | if (($data = \fread($this->handle, $realCount)) !== false) { |
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129 | $this->offset += \strlen($data); |
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130 | } |
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131 | |||
132 | return $data; |
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133 | } else { |
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134 | return false; |
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135 | } |
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136 | } |
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137 | |||
138 | |||
139 | public function stream_seek(int $offset, int $whence = \SEEK_SET) |
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140 | { |
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141 | if ($whence === \SEEK_SET) { |
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142 | $newOffset = $this->enforceOffsetMin + $offset; |
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143 | } elseif ($whence === \SEEK_CUR) { |
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144 | $newOffset = $this->offset + $offset; |
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145 | } elseif ($whence === \SEEK_END) { |
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146 | $newOffset = $this->enforceOffsetMax + $offset; |
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147 | } else { |
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148 | return false; |
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149 | } |
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150 | |||
151 | if (($newOffset < $this->enforceOffsetMin) || ($this->enforceOffsetMax <= $newOffset)) { |
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152 | return false; |
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153 | } |
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154 | |||
155 | $this->offset = $newOffset; |
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156 | return true; |
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157 | } |
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158 | |||
159 | |||
160 | public function stream_tell() |
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161 | { |
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162 | if ($this->offset < $this->enforceOffsetMin || $this->enforceOffsetMax <= $this->offset) { |
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163 | return; |
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164 | } |
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165 | |||
166 | return $this->offset - $this->enforceOffsetMin; |
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167 | } |
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168 | |||
169 | |||
170 | public function stream_stat() |
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171 | { |
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172 | return [ |
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173 | 7 => ($this->enforceOffsetMax - $this->enforceOffsetMin), |
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174 | 'size' => ($this->enforceOffsetMax - $this->enforceOffsetMin), |
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175 | ]; |
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176 | } |
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177 | } |
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178 |
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.