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226 | daniel-mar | 1 | <?php |
2 | |||
3 | /* |
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4 | * OID-Utilities for PHP |
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5 | * Copyright 2011-2019 Daniel Marschall, ViaThinkSoft |
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6 | * Version 2019-03-25 |
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7 | * |
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8 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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9 | * you may not use this file except in compliance with the License. |
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10 | * You may obtain a copy of the License at |
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11 | * |
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12 | * http://www.apache.org/licenses/LICENSE-2.0 |
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13 | * |
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14 | * Unless required by applicable law or agreed to in writing, software |
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15 | * distributed under the License is distributed on an "AS IS" BASIS, |
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16 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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17 | * See the License for the specific language governing permissions and |
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18 | * limitations under the License. |
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19 | */ |
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20 | |||
21 | // All functions in this library are compatible with leading zeroes (not recommended) and leading dots |
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22 | |||
23 | // TODO: change the function names, so that they have a uniform naming schema, and rename "oid identifier" into "asn.1 alphanumeric identifier" |
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24 | // TODO: Function for finding a shared ancestor, e.g. oid_shared_ancestor('2.999.1.2.3', '2.999.4.5') == '2.999' |
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25 | |||
26 | define('OID_DOT_FORBIDDEN', 0); |
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27 | define('OID_DOT_OPTIONAL', 1); |
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28 | define('OID_DOT_REQUIRED', 2); |
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29 | |||
30 | /** |
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31 | * Checks if an OID has a valid dot notation. |
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32 | * @author Daniel Marschall, ViaThinkSoft |
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33 | * @version 2014-12-09 |
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34 | * @param $oid (string)<br /> |
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35 | * An OID in dot notation. |
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36 | * @param $allow_leading_zeroes (bool)<br /> |
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37 | * true of leading zeroes are allowed or not. |
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38 | * @param $allow_leading_dot (bool)<br /> |
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39 | * true of leading dots are allowed or not. |
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40 | * @return (bool) true if the dot notation is valid. |
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41 | **/ |
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42 | function oid_valid_dotnotation($oid, $allow_leading_zeroes=true, $allow_leading_dot=false, $min_len=0) { |
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43 | $regex = oid_validation_regex($allow_leading_zeroes, $allow_leading_dot, $min_len); |
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44 | |||
45 | return preg_match($regex, $oid, $m) ? true : false; |
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46 | } |
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47 | |||
48 | /** |
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49 | * Returns a full regular expression to validate an OID in dot-notation |
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50 | * @author Daniel Marschall, ViaThinkSoft |
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51 | * @version 2014-12-09 |
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52 | * @param $allow_leading_zeroes (bool)<br /> |
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53 | * true of leading zeroes are allowed or not. |
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54 | * @param $allow_leading_dot (bool)<br /> |
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55 | * true of leading dots are allowed or not. |
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56 | * @return (string) The regular expression |
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57 | **/ |
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58 | function oid_validation_regex($allow_leading_zeroes=true, $allow_leading_dot=false, $min_len=0) { |
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59 | $leading_dot_policy = $allow_leading_dot ? OID_DOT_OPTIONAL : OID_DOT_FORBIDDEN; |
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60 | |||
61 | $part_regex = oid_part_regex($min_len, $allow_leading_zeroes, $leading_dot_policy); |
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62 | |||
63 | return '@^'.$part_regex.'$@'; |
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64 | } |
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65 | |||
66 | /** |
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67 | * Returns a partial regular expression which matches valid OIDs in dot notation. |
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68 | * It can be inserted into regular expressions. |
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69 | * @author Daniel Marschall, ViaThinkSoft |
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70 | * @version 2014-12-09 |
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71 | * @param $min_len (int)<br /> |
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72 | * 0="." and greater will be recognized, but not ""<br /> |
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73 | * 1=".2" and greater will be recognized<br /> |
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74 | * 2=".2.999" and greater will be recognized (default)<br /> |
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75 | * etc. |
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76 | * @param $allow_leading_zeroes (bool)<br /> |
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77 | * true: ".2.0999" will be recognized<br /> |
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78 | * false: ".2.0999" won't be recognized (default) |
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79 | * @param $leading_dot_policy (int)<br /> |
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80 | * 0 (OID_DOT_FORBIDDEN): forbidden<br /> |
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81 | * 1 (OID_DOT_OPTIONAL) : optional (default)<br /> |
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82 | * 2 (OID_DOT_REQUIRED) : enforced |
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83 | * @return (string) A regular expression which matches OIDs in dot notation |
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84 | **/ |
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85 | function oid_part_regex($min_len=2, $allow_leading_zeroes=false, $leading_dot_policy=OID_DOT_OPTIONAL) { |
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86 | switch ($leading_dot_policy) { |
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87 | case 0: // forbidden |
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88 | $lead_dot = ''; |
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89 | break; |
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90 | case 1: // optional |
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91 | $lead_dot = '\\.{0,1}'; |
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92 | break; |
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93 | case 2: // enforced |
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94 | $lead_dot = '\\.'; |
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95 | break; |
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96 | default: |
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97 | assert(false); |
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98 | break; |
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99 | } |
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100 | |||
101 | $lead_zero = $allow_leading_zeroes ? '0*' : ''; |
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102 | $zero_till_thirtynine = '(([0-9])|([1-3][0-9]))'; // second arc is limited to 0..39 if root arc is 0..1 |
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103 | $singledot_option = ($min_len == 0) && ($leading_dot_policy != OID_DOT_FORBIDDEN) ? '|\\.' : ''; |
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104 | $only_root_option = ($min_len <= 1) ? '|('.$lead_dot.$lead_zero.'[0-2])' : ''; |
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105 | |||
106 | $regex = ' |
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107 | ( |
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108 | ( |
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109 | ( |
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110 | ('.$lead_dot.$lead_zero.'[0-1]) |
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111 | \\.'.$lead_zero.$zero_till_thirtynine.' |
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112 | (\\.'.$lead_zero.'(0|[1-9][0-9]*)){'.max(0, $min_len-2).',} |
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113 | )|( |
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114 | ('.$lead_dot.$lead_zero.'[2]) |
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115 | (\\.'.$lead_zero.'(0|[1-9][0-9]*)){'.max(0, $min_len-1).',} |
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116 | ) |
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117 | '.$only_root_option.' |
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118 | '.$singledot_option.' |
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119 | ) |
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120 | )'; |
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121 | |||
122 | // Remove the indentations which are used to maintain this large regular expression in a human friendly way |
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123 | $regex = str_replace("\n", '', $regex); |
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124 | $regex = str_replace("\r", '', $regex); |
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125 | $regex = str_replace("\t", '', $regex); |
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126 | $regex = str_replace(' ', '', $regex); |
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127 | |||
128 | return $regex; |
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129 | } |
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130 | |||
131 | /** |
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132 | * Searches all OIDs in $text and outputs them as array. |
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133 | * @author Daniel Marschall, ViaThinkSoft |
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134 | * @version 2014-12-09 |
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135 | * @param $text (string)<br /> |
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136 | * The text to be parsed |
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137 | * @param $min_len (int)<br /> |
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138 | * 0="." and greater will be recognized, but not ""<br /> |
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139 | * 1=".2" and greater will be recognized<br /> |
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140 | * 2=".2.999" and greater will be recognized (default)<br /> |
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141 | * etc. |
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142 | * @param $allow_leading_zeroes (bool)<br /> |
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143 | * true: ".2.0999" will be recognized<br /> |
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144 | * false: ".2.0999" won't be recognized (default) |
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145 | * @param $leading_dot_policy (int)<br /> |
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146 | * 0 (OID_DOT_FORBIDDEN): forbidden<br /> |
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147 | * 1 (OID_DOT_OPTIONAL) : optional (default)<br /> |
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148 | * 2 (OID_DOT_REQUIRED) : enforced |
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149 | * @param $requires_whitespace_delimiters (bool)<br /> |
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150 | * true: "2.999" will be recognized, as well as " 2.999 " (default)<br /> |
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151 | * false: "2.999!" will be reconigzed, as well as "2.999.c" (this might be used in in documentations with templates) |
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152 | * @return (array<string>) An array of OIDs in dot notation |
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153 | **/ |
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154 | function parse_oids($text, $min_len=2, $allow_leading_zeroes=false, $leading_dot_policy=OID_DOT_OPTIONAL, $requires_whitespace_delimiters=true) { |
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155 | $regex = oid_detection_regex($min_len, $allow_leading_zeroes, $leading_dot_policy, $requires_whitespace_delimiters); |
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156 | |||
157 | preg_match_all($regex, $text, $matches); |
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158 | return $matches[1]; |
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159 | } |
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160 | |||
161 | /** |
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162 | * Returns a full regular expression for detecting OIDs in dot notation inside a text. |
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163 | * @author Daniel Marschall, ViaThinkSoft |
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164 | * @version 2014-12-09 |
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165 | * @param $min_len (int)<br /> |
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166 | * 0="." and greater will be recognized, but not ""<br /> |
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167 | * 1=".2" and greater will be recognized<br /> |
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168 | * 2=".2.999" and greater will be recognized (default)<br /> |
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169 | * etc. |
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170 | * @param $allow_leading_zeroes (bool)<br /> |
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171 | * true: ".2.0999" will be recognized<br /> |
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172 | * false: ".2.0999" won't be recognized (default) |
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173 | * @param $leading_dot_policy (int)<br /> |
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174 | * 0 (OID_DOT_FORBIDDEN): forbidden<br /> |
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175 | * 1 (OID_DOT_OPTIONAL) : optional (default)<br /> |
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176 | * 2 (OID_DOT_REQUIRED) : enforced |
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177 | * @param $requires_whitespace_delimiters (bool)<br /> |
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178 | * true: "2.999" will be recognized, as well as " 2.999 " (default)<br /> |
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179 | * false: "2.999!" will be reconigzed, as well as "2.999.c" (this might be used in in documentations with templates) |
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180 | * @return (string) The regular expression |
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181 | **/ |
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182 | function oid_detection_regex($min_len=2, $allow_leading_zeroes=false, $leading_dot_policy=OID_DOT_OPTIONAL, $requires_whitespace_delimiters=true) { |
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183 | if ($requires_whitespace_delimiters) { |
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184 | // A fully qualified regular expression which can be used by preg_match() |
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185 | $begin_condition = '(?<=^|\\s)'; |
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186 | $end_condition = '(?=\\s|$)'; |
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187 | } else { |
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188 | // A partial expression which can be used inside another regular expression |
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189 | $begin_condition = '(?<![\d])'; |
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190 | $end_condition = '(?![\d])'; |
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191 | } |
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192 | |||
193 | $part_regex = oid_part_regex($min_len, $allow_leading_zeroes, $leading_dot_policy); |
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194 | |||
195 | return '@'.$begin_condition.$part_regex.$end_condition.'@'; |
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196 | } |
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197 | |||
198 | /** |
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199 | * Returns the parent of an OID in dot notation or the OID itself, if it is the root.<br /> |
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200 | * Leading dots and leading zeroes are tolerated. |
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201 | * @author Daniel Marschall, ViaThinkSoft |
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202 | * @version 2014-12-16 |
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203 | * @param $oid (string)<br /> |
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204 | * An OID in dot notation. |
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205 | * @return (string) The parent OID in dot notation. |
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206 | **/ |
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207 | function oid_up($oid) { |
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208 | $oid = sanitizeOID($oid, 'auto'); |
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209 | if ($oid === false) return false; |
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210 | |||
211 | $p = strrpos($oid, '.'); |
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212 | if ($p === false) return $oid; |
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213 | if ($p == 0) return '.'; |
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214 | |||
215 | return substr($oid, 0, $p); |
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216 | } |
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217 | |||
218 | /** |
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219 | * Outputs the depth of an OID. |
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220 | * @author Daniel Marschall, ViaThinkSoft |
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221 | * @version 2014-12-09 |
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222 | * @param $oid (string) An OID in dot notation (with or without leading dot) |
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223 | * @return (int) The depth of the OID, e.g. 2.999 and .2.999 has the length 2. |
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224 | **/ |
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225 | function oid_len($oid) { |
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226 | if ($oid == '') return 0; |
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227 | if ($oid[0] == '.') $oid = substr($oid, 1); |
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228 | return substr_count($oid, '.')+1; |
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229 | } |
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230 | function oid_depth($oid) { |
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231 | return oid_len($oid); |
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232 | } |
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233 | |||
234 | /** |
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235 | * Lists all parents of an OID. |
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236 | * This function tolerates leading dots. The parent of '.' stays '.'. |
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237 | * The OID will not be checked for validity! |
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238 | * @author Daniel Marschall, ViaThinkSoft |
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239 | * @version 2014-12-17 |
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240 | * @param $oid (string)<br /> |
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241 | * An OID in dot notation. |
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242 | * @return (array<string>) An array with all parent OIDs. |
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243 | **/ |
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244 | function oid_parents($oid) { |
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245 | $parents = array(); |
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246 | |||
247 | while (oid_len($oid) > 1) { |
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248 | $oid = oid_up($oid); |
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249 | $parents[] = $oid; |
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250 | } |
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251 | |||
252 | if (substr($oid, 0, 1) == '.') $parents[] = '.'; |
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253 | |||
254 | return $parents; |
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255 | } |
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256 | |||
257 | /* |
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258 | assert(oid_parents('.1.2.999') == array('.1.2', '.1', '.')); |
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259 | assert(oid_parents('1.2.999') == array('1.2', '1')); |
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260 | assert(oid_parents('.') == array('.')); |
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261 | assert(oid_parents('') == array()); |
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262 | */ |
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263 | |||
264 | /** |
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265 | * Sorts an array containing OIDs in dot notation. |
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266 | * @author Daniel Marschall, ViaThinkSoft |
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267 | * @version 2014-12-09 |
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268 | * @param $ary (array<string>)<br /> |
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269 | * An array of OIDs in dot notation.<br /> |
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270 | * This array will be changed by this method. |
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271 | * @param $output_with_leading_dot (bool)<br /> |
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272 | * true: The array will be normalized to OIDs with a leading dot. |
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273 | * false: The array will be normalized to OIDs without a leading dot. (default) |
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274 | * @return Nothing |
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275 | **/ |
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276 | function oidSort(&$ary, $output_with_leading_dot=false) { |
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277 | $out = array(); |
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278 | |||
279 | $none = $output_with_leading_dot ? '.' : ''; |
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280 | |||
281 | $d = array(); |
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282 | foreach ($ary as &$oid) { |
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283 | if (($oid == '') || ($oid == '.')) { |
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284 | $out[] = $none; |
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285 | } else { |
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286 | $oid = sanitizeOID($oid, 'auto'); // strike leading zeroes |
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287 | $bry = explode('.', $oid, 2); |
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288 | $firstarc = $bry[0]; |
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289 | $rest = (isset($bry[1])) ? $bry[1] : ''; |
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290 | $d[$firstarc][] = $rest; |
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291 | } |
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292 | } |
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293 | unset($oid); |
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294 | ksort($d); |
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295 | |||
296 | foreach ($d as $firstarc => &$data) { |
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297 | oidSort($data); |
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298 | foreach ($data as &$rest) { |
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299 | $out[] = ($output_with_leading_dot ? '.' : '')."$firstarc" . (($rest != $none) ? ".$rest" : ''); |
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300 | } |
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301 | } |
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302 | unset($data); |
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303 | |||
304 | $ary = $out; |
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305 | } |
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306 | |||
307 | /** |
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308 | * Removes leading zeroes from an OID in dot notation. |
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309 | * @author Daniel Marschall, ViaThinkSoft |
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310 | * @version 2015-08-17 |
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311 | * @param $oid (string)<br /> |
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312 | * An OID in dot notation. |
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313 | * @param $leading_dot (bool)<br /> |
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314 | * true: The OID is valid, if it contains a leading dot.<br /> |
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315 | * false (default): The OID is valid, if it does not contain a leading dot. |
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316 | * 'auto: Allow both |
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317 | * @return (mixed) The OID without leading dots, or <code>false</code> if the OID is syntactically wrong. |
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318 | **/ |
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319 | $oid_sanitize_cache = array(); |
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320 | function sanitizeOID($oid, $leading_dot=false) { |
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321 | if ($leading_dot) $leading_dot = substr($oid,0,1) == '.'; |
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322 | |||
323 | // We are using a cache, since this function is used very often by OID+ |
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324 | global $oid_sanitize_cache; |
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325 | $v = ($leading_dot ? 'T' : 'F').$oid; |
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326 | if (isset($oid_sanitize_cache[$v])) return $oid_sanitize_cache[$v]; |
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327 | |||
328 | if ($leading_dot) { |
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329 | if ($oid == '.') return ''; |
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330 | } else { |
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331 | if ($oid == '') return ''; |
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332 | } |
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333 | |||
334 | $out = ''; |
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335 | $ary = explode('.', $oid); |
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336 | foreach ($ary as $n => &$a) { |
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337 | if (($leading_dot) && ($n == 0)) { |
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338 | if ($a != '') return false; |
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339 | continue; |
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340 | } |
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341 | |||
342 | if (!ctype_digit($a)) return false; // does contain something other than digits |
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343 | |||
344 | // strike leading zeroes |
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345 | $a = preg_replace("@^0+@", '', $a); |
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346 | if ($a == '') $a = 0; |
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347 | |||
348 | if (($leading_dot) || ($n != 0)) $out .= '.'; |
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349 | $out .= $a; |
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350 | } |
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351 | unset($a); |
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352 | unset($ary); |
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353 | |||
354 | $oid_sanitize_cache[$v] = $out; |
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355 | return $out; |
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356 | } |
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357 | |||
358 | /** |
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359 | * Shows the top arc of an OID. |
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360 | * This function tolerates leading dots. |
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361 | * @author Daniel Marschall, ViaThinkSoft |
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362 | * @version 2014-12-16 |
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363 | * @param $oid (string)<br /> |
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364 | * An OID in dot notation. |
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365 | * @return (mixed) The top arc of the OID or empty string if it is already the root ('.') |
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366 | **/ |
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367 | function oid_toparc($oid) { |
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368 | $leadingdot = substr($oid,0,1) == '.'; |
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369 | |||
370 | $oid = sanitizeOID($oid, $leadingdot); |
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371 | if ($oid === false) return false; |
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372 | |||
373 | if (!$leadingdot) $oid = '.'.$oid; |
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374 | |||
375 | $p = strrpos($oid, '.'); |
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376 | if ($p === false) return false; |
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377 | $r = substr($oid, $p+1); |
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378 | |||
379 | if ($leadingdot) { |
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380 | # if ($r == '') return '.'; |
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381 | return $r; |
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382 | } else { |
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383 | return substr($r, 1); |
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384 | } |
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385 | } |
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386 | |||
387 | /** |
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388 | * Calculates the distance between two OIDs. |
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389 | * This function tolerates leading dots and leading zeroes. |
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390 | * @author Daniel Marschall, ViaThinkSoft |
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391 | * @version 2014-12-20 |
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392 | * @param $a (string)<br /> |
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393 | * An OID. |
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394 | * @param $b (string)<br /> |
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395 | * An OID. |
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396 | * @return (string) false if both OIDs do not have a child-parent or parent-child relation, e.g. oid_distance('2.999.1.2.3', '2.999.4.5') = false, or if one of the OIDs is syntactially invalid<br /> |
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397 | * >0 if $a is more specific than $b , e.g. oid_distance('2.999.1.2', '2.999') = 2<br /> |
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398 | * <0 if $a is more common than $b , e.g. oid_distance('2.999', '2.999.1.2') = -2 |
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399 | **/ |
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400 | function oid_distance($a, $b) { |
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401 | if (substr($a,0,1) == '.') $a = substr($a,1); |
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402 | if (substr($b,0,1) == '.') $b = substr($b,1); |
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403 | |||
404 | $a = sanitizeOID($a, false); |
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405 | if ($a === false) return false; |
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406 | $b = sanitizeOID($b, false); |
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407 | if ($b === false) return false; |
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408 | |||
409 | $ary = explode('.', $a); |
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410 | $bry = explode('.', $b); |
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411 | |||
412 | $min_len = min(count($ary), count($bry)); |
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413 | |||
414 | for ($i=0; $i<$min_len; $i++) { |
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415 | if ($ary[$i] != $bry[$i]) return false; |
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416 | } |
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417 | |||
418 | return count($ary) - count($bry); |
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419 | } |
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420 | |||
421 | /* |
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422 | assert(oid_distance('2.999.1.2.3', '2.999.4.5') === false); |
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423 | assert(oid_distance('2.999.1.2', '2.999') === 2); |
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424 | assert(oid_distance('2.999', '2.999.1.2') === -2); |
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425 | */ |
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426 | |||
427 | /** |
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428 | * Adds a leading dot to an OID. |
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429 | * Leading zeroes are tolerated. |
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430 | * @author Daniel Marschall, ViaThinkSoft |
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431 | * @version 2014-12-20 |
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432 | * @param $oid (string)<br /> |
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433 | * An OID. |
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434 | * @return (string) The OID with a leading dot or false if the OID is syntactially wrong. |
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435 | **/ |
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436 | function oid_add_leading_dot($oid) { |
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437 | $oid = sanitizeOID($oid, 'auto'); |
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438 | if ($oid === false) return false; |
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439 | |||
440 | if ($oid[0] != '.') $oid = '.'.$oid; |
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441 | return $oid; |
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442 | } |
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443 | |||
444 | /** |
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445 | * Removes a leading dot to an OID. |
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446 | * Leading zeroes are tolerated. |
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447 | * @author Daniel Marschall, ViaThinkSoft |
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448 | * @version 2014-12-20 |
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449 | * @param $oid (string)<br /> |
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450 | * An OID. |
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451 | * @return (string) The OID without a leading dot or false if the OID is syntactially wrong. |
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452 | **/ |
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453 | function oid_remove_leading_dot($oid) { |
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454 | $oid = sanitizeOID($oid, 'auto'); |
||
455 | if ($oid === false) return false; |
||
456 | |||
457 | if (substr($oid,0,1) == '.') $oid = substr($oid, 1); |
||
458 | return $oid; |
||
459 | } |
||
460 | |||
461 | |||
462 | # === OID-IRI NOTATION FUNCTIONS === |
||
463 | |||
464 | if (!function_exists('mb_ord')) { |
||
465 | # http://stackoverflow.com/a/24755772/3544341 |
||
466 | function mb_ord($char, $encoding = 'UTF-8') { |
||
467 | if ($encoding === 'UCS-4BE') { |
||
468 | list(, $ord) = (strlen($char) === 4) ? @unpack('N', $char) : @unpack('n', $char); |
||
469 | return $ord; |
||
470 | } else { |
||
471 | return mb_ord(mb_convert_encoding($char, 'UCS-4BE', $encoding), 'UCS-4BE'); |
||
472 | } |
||
473 | } |
||
474 | } |
||
475 | |||
476 | function iri_char_valid($c, $firstchar, $lastchar) { |
||
477 | // see Rec. ITU-T X.660, clause 7.5 |
||
478 | |||
479 | if (($firstchar || $lastchar) && ($c == '-')) return false; |
||
480 | |||
481 | if ($c == '-') return true; |
||
482 | if ($c == '.') return true; |
||
483 | if ($c == '_') return true; |
||
484 | if ($c == '~') return true; |
||
485 | if (($c >= '0') && ($c <= '9') && (!$firstchar)) return true; |
||
486 | if (($c >= 'A') && ($c <= 'Z')) return true; |
||
487 | if (($c >= 'a') && ($c <= 'z')) return true; |
||
488 | |||
489 | $v = mb_ord($c); |
||
490 | |||
491 | if (($v >= 0x000000A0) && ($v <= 0x0000DFFE)) return true; |
||
492 | if (($v >= 0x0000F900) && ($v <= 0x0000FDCF)) return true; |
||
493 | if (($v >= 0x0000FDF0) && ($v <= 0x0000FFEF)) return true; |
||
494 | if (($v >= 0x00010000) && ($v <= 0x0001FFFD)) return true; |
||
495 | if (($v >= 0x00020000) && ($v <= 0x0002FFFD)) return true; |
||
496 | if (($v >= 0x00030000) && ($v <= 0x0003FFFD)) return true; |
||
497 | if (($v >= 0x00040000) && ($v <= 0x0004FFFD)) return true; |
||
498 | if (($v >= 0x00050000) && ($v <= 0x0005FFFD)) return true; |
||
499 | if (($v >= 0x00060000) && ($v <= 0x0006FFFD)) return true; |
||
500 | if (($v >= 0x00070000) && ($v <= 0x0007FFFD)) return true; |
||
501 | if (($v >= 0x00080000) && ($v <= 0x0008FFFD)) return true; |
||
502 | if (($v >= 0x00090000) && ($v <= 0x0009FFFD)) return true; |
||
503 | if (($v >= 0x000A0000) && ($v <= 0x000AFFFD)) return true; |
||
504 | if (($v >= 0x000B0000) && ($v <= 0x000BFFFD)) return true; |
||
505 | if (($v >= 0x000C0000) && ($v <= 0x000CFFFD)) return true; |
||
506 | if (($v >= 0x000D0000) && ($v <= 0x000DFFFD)) return true; |
||
507 | if (($v >= 0x000E1000) && ($v <= 0x000EFFFD)) return true; |
||
508 | |||
509 | // Note: Rec. ITU-T X.660, clause 7.5.3 would also forbid ranges which are marked in ISO/IEC 10646 as "(This position shall not be used)" |
||
510 | // But tool implementers should be tolerate them, since these limitations can be removed in future. |
||
511 | |||
512 | return false; |
||
513 | } |
||
514 | |||
515 | function iri_arc_valid($arc, $allow_numeric=true) { |
||
516 | if ($arc == '') return false; |
||
517 | |||
518 | if ($allow_numeric && preg_match('@^(\\d+)$@', $arc, $m)) return true; # numeric arc |
||
519 | |||
520 | // Question: Should we strip RTL/LTR characters? |
||
521 | |||
522 | if (mb_substr($arc, 2, 2) == '--') return false; // see Rec. ITU-T X.660, clause 7.5.4 |
||
523 | |||
524 | $array = array(); |
||
525 | preg_match_all('/./u', $arc, $array, PREG_SET_ORDER); |
||
526 | $len = count($array); |
||
527 | foreach ($array as $i => $char) { |
||
528 | if (!iri_char_valid($char[0], $i==0, $i==$len-1)) return false; |
||
529 | } |
||
530 | |||
531 | return true; |
||
532 | } |
||
533 | |||
534 | /** |
||
535 | * Checks if an IRI identifier is valid or not. |
||
536 | * @author Daniel Marschall, ViaThinkSoft |
||
537 | * @version 2014-12-17 |
||
538 | * @param $iri (string)<br /> |
||
539 | * An OID in OID-IRI notation, e.g. /Example/test |
||
540 | * @return (bool) true if the IRI identifier is valid. |
||
541 | **/ |
||
542 | function iri_valid($iri) { |
||
543 | if ($iri == '/') return true; // OK? |
||
544 | |||
545 | if (substr($iri, 0, 1) != '/') return false; |
||
546 | |||
547 | $ary = explode('/', $iri); |
||
548 | array_shift($ary); |
||
549 | foreach ($ary as $a) { |
||
550 | if (!iri_arc_valid($a)) return false; |
||
551 | } |
||
552 | |||
553 | return true; |
||
554 | } |
||
555 | |||
556 | /* |
||
557 | assert(iri_arc_valid('ABCDEF')); |
||
558 | assert(!iri_arc_valid('-ABCDEF')); |
||
559 | assert(!iri_arc_valid('ABCDEF-')); |
||
560 | assert(!iri_arc_valid(' ABCDEF')); |
||
561 | assert(!iri_arc_valid('2 ABCDEF')); |
||
562 | assert(!iri_arc_valid('')); |
||
563 | |||
564 | assert(!iri_valid('')); |
||
565 | assert(iri_valid('/')); |
||
566 | assert(iri_valid('/hello/world')); |
||
567 | assert(iri_valid('/123/world')); |
||
568 | assert(!iri_valid('/hello/0world')); |
||
569 | assert(!iri_valid('/hello/xo--test')); |
||
570 | assert(!iri_valid('/hello/-super-/sd')); |
||
571 | */ |
||
572 | |||
573 | /** |
||
574 | * Returns an associative array in the form 'ASN.1' => '/2/1' . |
||
575 | * @author Daniel Marschall, ViaThinkSoft |
||
576 | * @version 2018-01-05 |
||
577 | * @see http://itu.int/go/X660 |
||
578 | * @return (array) An associative array in the form 'ASN.1' => '/2/1' . |
||
579 | **/ |
||
580 | function iri_get_long_arcs() { |
||
581 | $iri_long_arcs = array(); |
||
582 | $iri_long_arcs['ASN.1'] = '/2/1'; |
||
583 | $iri_long_arcs['Country'] = '/2/16'; |
||
584 | $iri_long_arcs['International-Organizations'] = '/2/23'; |
||
585 | $iri_long_arcs['UUID'] = '/2/25'; |
||
586 | $iri_long_arcs['Tag-Based'] = '/2/27'; |
||
587 | $iri_long_arcs['BIP'] = '/2/41'; |
||
588 | $iri_long_arcs['Telebiometrics'] = '/2/42'; |
||
589 | $iri_long_arcs['Cybersecurity'] = '/2/48'; |
||
590 | $iri_long_arcs['Alerting'] = '/2/49'; |
||
591 | $iri_long_arcs['OIDResolutionSystem'] = '/2/50'; |
||
592 | $iri_long_arcs['GS1'] = '/2/51'; |
||
593 | $iri_long_arcs['Example'] = '/2/999'; // English |
||
594 | $iri_long_arcs['Exemple'] = '/2/999'; // French |
||
595 | $iri_long_arcs['Ejemplo'] = '/2/999'; // Spanish |
||
596 | $iri_long_arcs["\u{0627}\u{0644}\u{0645}\u{062B}\u{0627}\u{0644}"] = '/2/999'; // Arabic |
||
597 | $iri_long_arcs["\u{8303}\u{4F8B}"] = '/2/999'; // Chinese |
||
598 | $iri_long_arcs["\u{041F}\u{0440}\u{0438}\u{043C}\u{0435}\u{0440}"] = '/2/999'; // Russian |
||
599 | $iri_long_arcs["\u{C608}\u{C81C}"] = '/2/999'; // Korean |
||
600 | $iri_long_arcs["\u{4F8B}"] = '/2/999'; // Japanese |
||
601 | $iri_long_arcs['Beispiel'] = '/2/999'; // German |
||
602 | return $iri_long_arcs; |
||
603 | } |
||
604 | |||
605 | /** |
||
606 | * Tries to shorten/simplify an IRI by applying "long arcs", e.g. /2/999/123 -> /Example/123 . |
||
607 | * @author Daniel Marschall, ViaThinkSoft |
||
608 | * @version 2014-12-28 |
||
609 | * @param $iri (string)<br /> |
||
610 | * An OID in OID-IRI notation, e.g. /Example/test |
||
611 | * @return (string) The modified IRI. |
||
612 | **/ |
||
613 | function iri_add_longarcs($iri) { |
||
614 | $iri_long_arcs = iri_get_long_arcs(); |
||
615 | |||
616 | // TODO: $iri valid? |
||
617 | |||
618 | $ary = explode('/', $iri); |
||
619 | |||
620 | $ary_number_iri = $ary; |
||
621 | if ($ary_number_iri[1] == 'Joint-ISO-ITU-T') $ary_number_iri[1] = '2'; |
||
622 | /* |
||
623 | if ($ary_number_iri[1] == '2') { |
||
624 | // TODO: /2/Example -> /2/999 -> /Example |
||
625 | } else { |
||
626 | // Currently, only long arcs inside .2 are defined |
||
627 | // return $iri; |
||
628 | } |
||
629 | */ |
||
630 | $number_iri = implode('/', $ary_number_iri); |
||
631 | |||
632 | foreach ($iri_long_arcs as $cur_longarc => $cur_iri) { |
||
633 | // TODO: $cur_iri valid? |
||
634 | |||
635 | if (strpos($number_iri.'/', $cur_iri.'/') === 0) { |
||
636 | $cnt = substr_count($cur_iri, '/'); |
||
637 | for ($i=1; $i<$cnt; $i++) { |
||
638 | array_shift($ary); |
||
639 | } |
||
640 | $ary[0] = ''; |
||
641 | $ary[1] = $cur_longarc; |
||
642 | $iri = implode('/', $ary); |
||
643 | break; |
||
644 | } |
||
645 | } |
||
646 | |||
647 | return $iri; |
||
648 | } |
||
649 | |||
650 | # === FUNCTIONS FOR OIDS IN ASN.1 NOTATION === |
||
651 | |||
652 | /** |
||
653 | * Checks if an ASN.1 identifier is valid. |
||
654 | * @author Daniel Marschall, ViaThinkSoft |
||
655 | * @version 2014-12-09 |
||
656 | * @param $id (string)<br /> |
||
657 | * An ASN.1 identifier, e.g. "example". Not "example(99)" or "99" and not a path like "{ 2 999 }" |
||
658 | * Note: Use asn1_path_valid() for validating a whole ASN.1 notation path. |
||
659 | * @return (bool) true, if the identifier is valid: It begins with an lowercase letter and contains only 0-9, a-z, A-Z and "-" |
||
660 | **/ |
||
661 | # TODO: umbenennen in asn1_alpha_id_valid |
||
662 | function oid_id_is_valid($id) { |
||
663 | return preg_match('/^([a-z][a-zA-Z0-9-]*)$/', $id); |
||
664 | } |
||
665 | |||
666 | /** |
||
667 | * Checks if the ASN.1 notation of an OID is valid. |
||
668 | * This function does not tolerate leading zeros. |
||
669 | * This function will fail (return false) if there are unresolved symbols, e.g. {iso test} is not valid while { iso 123 } is valid. |
||
670 | * @author Daniel Marschall, ViaThinkSoft |
||
671 | * @version 2014-12-17 |
||
672 | * @param $asn (string)<br /> |
||
673 | * An OID in ASN.1 notation. |
||
674 | * @return (bools) true if the identifier is valid. |
||
675 | **/ |
||
676 | function asn1_path_valid($asn1) { |
||
677 | return asn1_to_dot($asn1) != false; |
||
678 | } |
||
679 | |||
680 | /** |
||
681 | * Returns an array of standardized ASN.1 alphanumeric identifiers which do not require a numeric identifier, e.g. { 2 example } |
||
682 | * The array has the form '0.0.a' -> '0.0.1' |
||
683 | * @author Daniel Marschall, ViaThinkSoft |
||
684 | * @version 2019-03-25 |
||
685 | * @see http://www.oid-info.com/name-forms.htm |
||
686 | * @return (array) Associative array of standardized ASN.1 alphanumeric identifiers |
||
687 | **/ |
||
688 | function asn1_get_standardized_array() { |
||
689 | |||
690 | // Taken from oid-info.com |
||
691 | // http://www.oid-info.com/name-forms.htm |
||
692 | $standardized = array(); |
||
693 | $standardized['itu-t'] = '0'; |
||
694 | $standardized['ccitt'] = '0'; |
||
695 | $standardized['iso'] = '1'; |
||
696 | $standardized['joint-iso-itu-t'] = '2'; |
||
697 | $standardized['joint-iso-ccitt'] = '2'; |
||
698 | $standardized['0.recommendation'] = '0.0'; |
||
699 | $standardized['0.0.a'] = '0.0.1'; |
||
700 | $standardized['0.0.b'] = '0.0.2'; |
||
701 | $standardized['0.0.c'] = '0.0.3'; |
||
702 | $standardized['0.0.d'] = '0.0.4'; |
||
703 | $standardized['0.0.e'] = '0.0.5'; |
||
704 | $standardized['0.0.f'] = '0.0.6'; |
||
705 | $standardized['0.0.g'] = '0.0.7'; |
||
706 | $standardized['0.0.h'] = '0.0.8'; |
||
707 | $standardized['0.0.i'] = '0.0.9'; |
||
708 | $standardized['0.0.j'] = '0.0.10'; |
||
709 | $standardized['0.0.k'] = '0.0.11'; |
||
710 | $standardized['0.0.l'] = '0.0.12'; |
||
711 | $standardized['0.0.m'] = '0.0.13'; |
||
712 | $standardized['0.0.n'] = '0.0.14'; |
||
713 | $standardized['0.0.o'] = '0.0.15'; |
||
714 | $standardized['0.0.p'] = '0.0.16'; |
||
715 | $standardized['0.0.q'] = '0.0.17'; |
||
716 | $standardized['0.0.r'] = '0.0.18'; |
||
717 | $standardized['0.0.s'] = '0.0.19'; |
||
718 | $standardized['0.0.t'] = '0.0.20'; |
||
719 | $standardized['0.0.u'] = '0.0.21'; |
||
720 | $standardized['0.0.v'] = '0.0.22'; |
||
721 | $standardized['0.0.w'] = '0.0.23'; // actually, this OID does not exist |
||
722 | $standardized['0.0.x'] = '0.0.24'; |
||
723 | $standardized['0.0.y'] = '0.0.25'; |
||
724 | $standardized['0.0.z'] = '0.0.26'; |
||
725 | $standardized['0.question'] = '0.1'; |
||
726 | $standardized['0.administration'] = '0.2'; |
||
727 | $standardized['0.network-operator'] = '0.3'; |
||
728 | $standardized['0.identified-organization'] = '0.4'; |
||
729 | $standardized['1.standard'] = '1.0'; |
||
730 | $standardized['1.registration-authority'] = '1.1'; |
||
731 | $standardized['1.member-body'] = '1.2'; |
||
732 | $standardized['1.identified-organization'] = '1.3'; |
||
733 | return $standardized; |
||
734 | } |
||
735 | |||
736 | /** |
||
737 | * Converts an OID in ASN.1 notation into an OID in dot notation and tries to resolve well-known identifiers.<br /> |
||
738 | * e.g. {joint-iso-itu-t(2) example(999) 1 2 3} --> 2.999.1.2.3<br /> |
||
739 | * e.g. {iso 3} --> 1.3 |
||
740 | * This function does not tolerate leading zeros. |
||
741 | * This function will fail (return false) if there are unresolved symbols, e.g. {iso test} will not be resolved to 1.test |
||
742 | * @author Daniel Marschall, ViaThinkSoft |
||
743 | * @version 2014-12-17 |
||
744 | * @param $asn (string)<br /> |
||
745 | * An OID in ASN.1 notation. |
||
746 | * @return (string) An OID in dot notation without leading dot or false if the path is invalid. |
||
747 | **/ |
||
748 | function asn1_to_dot($asn) { |
||
749 | $standardized = asn1_get_standardized_array(); |
||
750 | |||
751 | // Clean up |
||
752 | $asn = preg_replace('@^\\{(.+)\\}$@', '\\1', $asn, -1, $count); |
||
753 | if ($count == 0) return false; // { and } are required. The asn.1 path will NOT be trimmed by this function |
||
754 | |||
755 | // If identifier is set, apply it (no check if it overrides a standardized identifier) |
||
756 | $asn = preg_replace('|\s*([a-z][a-zA-Z0-9-]*)\s*\((\d+)\)|', ' \\2', $asn); |
||
757 | $asn = trim($asn); |
||
758 | |||
759 | // Set dots |
||
760 | $asn = preg_replace('|\s+|', '.', $asn); |
||
761 | |||
762 | // Apply standardized identifiers (case sensitive) |
||
763 | $asn .= '.'; |
||
764 | foreach ($standardized as $s => $r) { |
||
765 | $asn = preg_replace("|^$s|", $r, $asn); |
||
766 | } |
||
767 | $asn = substr($asn, 0, strlen($asn)-1); |
||
768 | |||
769 | // Check if all numbers are OK |
||
770 | // -> every arc must be resolved |
||
771 | // -> numeric arcs must not have a leading zero |
||
772 | // -> invalid stuff will be recognized, e.g. a "(1)" without an identifier in front of it |
||
773 | $ary = explode('.', $asn); |
||
774 | foreach ($ary as $a) { |
||
775 | if (!preg_match('@^(0|([1-9]\\d*))$@', $a, $m)) return false; |
||
776 | } |
||
777 | |||
778 | return $asn; |
||
779 | } |
||
780 | |||
781 | /* |
||
782 | assert(asn1_to_dot('{2 999 (1)}') == false); |
||
783 | assert(asn1_to_dot('{2 999 test}') == false); |
||
784 | assert(asn1_to_dot('{2 999 1}') == '2.999.1'); |
||
785 | assert(asn1_to_dot(' {2 999 1} ') == false); |
||
786 | assert(asn1_to_dot('2 999 1') == false); |
||
787 | assert(asn1_to_dot('{2 999 01}') == false); |
||
788 | assert(asn1_to_dot('{ 0 question 123 }') == '0.1.123'); |
||
789 | assert(asn1_to_dot('{ iso }') == '1'); |
||
790 | assert(asn1_to_dot('{ iso(1) }') == '1'); |
||
791 | assert(asn1_to_dot('{ iso(2) }') == '2'); |
||
792 | assert(asn1_to_dot('{ iso 3 }') == '1.3'); |
||
793 | */ |
||
794 | |||
795 | /** |
||
796 | * "Soft corrects" an invalid ASN.1 identifier.<br /> |
||
797 | * Attention, by "soft correcting" the ID, it is not authoritative anymore, and might not be able to be resolved by ORS. |
||
798 | * @author Daniel Marschall, ViaThinkSoft |
||
799 | * @version 2014-12-09 |
||
800 | * @param $id (string)<br /> |
||
801 | * An ASN.1 identifier. |
||
802 | * @param $append_id_prefix (bool)<br /> |
||
803 | * true (default): If the identifier doesn't start with a-Z, the problem will be solved by prepending "id-" to the identifier.<br /> |
||
804 | * false: If the identifier doesn't start with a-Z, then the problem cannot be solved (method returns empty string). |
||
805 | * @return (string) The "soft corrected" ASN.1 identifier.<br /> |
||
806 | * Invalid characters will be removed.<br /> |
||
807 | * Uncorrectable start elements (0-9 or "-") will be either removed or solved by prepending "id-" (see <code>$append_id_prefix</code>)<br /> |
||
808 | * If the identifier begins with an upper case letter, the letter will be converted into lower case. |
||
809 | **/ |
||
810 | function oid_soft_correct_id($id, $append_id_prefix = true) { |
||
811 | // Convert "_" to "-" |
||
812 | $id = str_replace('_', '-', $id); |
||
813 | |||
814 | // Remove invalid characters |
||
815 | $id = preg_replace('/[^a-zA-Z0-9-]+/', '', $id); |
||
816 | |||
817 | // Remove uncorrectable start elements (0-9 or "-") |
||
818 | if ($append_id_prefix) { |
||
819 | $id = preg_replace('/^([^a-zA-Z]+)/', 'id-$1', $id); |
||
820 | } else { |
||
821 | $id = preg_replace('/^([^a-zA-Z]+)/', '', $id); |
||
822 | } |
||
823 | |||
824 | // "Correct" upper case beginning letter by converting it to lower case |
||
825 | if (preg_match('/^[A-Z]/', $id)) { |
||
826 | $id = strtolower($id[0]) . substr($id, 1); |
||
827 | } |
||
828 | |||
829 | return $id; |
||
830 | } |
||
831 |