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1 /**
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2 * Advanced authorization plugin for Orthanc
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3 * Copyright (C) 2017-2023 Osimis S.A., Belgium
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4 *
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5 * This program is free software: you can redistribute it and/or
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6 * modify it under the terms of the GNU Affero General Public License
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7 * as published by the Free Software Foundation, either version 3 of
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8 * the License, or (at your option) any later version.
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9 *
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10 * This program is distributed in the hope that it will be useful, but
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11 * WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 * Affero General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU Affero General Public License
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16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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17 **/
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18
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19 #include "PermissionParser.h"
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20
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21 #include <Toolbox.h>
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22 #include <OrthancException.h>
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23 #include <Logging.h>
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24
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25 namespace OrthancPlugins
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26 {
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27 PermissionPattern::PermissionPattern(const OrthancPluginHttpMethod& method, const std::string& patternRegex, const std::string& permissions) :
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28 method(method),
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29 pattern(patternRegex)
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30 {
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31 std::vector<std::string> permissionsVector;
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32 Orthanc::Toolbox::TokenizeString(permissionsVector, permissions, '|');
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33
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34 for (size_t i = 0; i < permissionsVector.size(); ++i)
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35 {
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36 this->permissions.insert(permissionsVector[i]);
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37 }
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38 }
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39
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40
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41 static void Replace(std::string& text, const std::string& findText, const std::string& replaceText)
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42 {
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43 size_t pos = text.find(findText);
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44 if (pos != std::string::npos)
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45 {
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46 text = text.replace(pos, findText.size(), replaceText);
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47 }
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48 }
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49
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50
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51 static void StripLeadingAndTrailingSlashes(std::string& text)
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52 {
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53 if (text.size() > 1 && text[0] == '/')
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54 {
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55 text = text.substr(1, text.size() -1);
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56 }
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57 if (text.size() > 1 && text[text.size() - 1] == '/')
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58 {
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59 text = text.substr(0, text.size() -1);
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60 }
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61 }
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62
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63
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64 PermissionParser::PermissionParser(const std::string& dicomWebRoot, const std::string& oe2Root) :
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65 dicomWebRoot_(dicomWebRoot),
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66 oe2Root_(oe2Root)
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67 {
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68 }
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69
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70 void PermissionParser::Add(const Json::Value& configuration)
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71 {
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72 if (configuration.type() != Json::arrayValue)
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73 {
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74 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadParameterType, "Permissions should be an array.");
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75 }
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76
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77 for (Json::ArrayIndex i = 0; i < configuration.size(); ++i)
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78 {
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79 const Json::Value& permission = configuration[i];
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80 if (permission.type() != Json::arrayValue || permission.size() < 3)
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81 {
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82 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadParameterType, "Permissions elements should be an array of min size 3.");
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83 }
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84
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85 Add(permission[0].asString(), // 0 = HTTP method
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86 permission[1].asString(), // 1 = pattern
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87 permission[2].asString() // 2 = list of | separated permissions (no space)
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88 // 3 = optional comment
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89 );
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90 }
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91
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92 }
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93
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94 void PermissionParser::Add(const std::string& method,
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95 const std::string& patternRegex,
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96 const std::string& permission)
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97 {
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98 std::string lowerCaseMethod;
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99 Orthanc::Toolbox::ToLowerCase(lowerCaseMethod, method);
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100 OrthancPluginHttpMethod parsedMethod = OrthancPluginHttpMethod_Get;
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101
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102 if (lowerCaseMethod == "post")
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103 {
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104 parsedMethod = OrthancPluginHttpMethod_Post;
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105 }
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106 else if (lowerCaseMethod == "put")
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107 {
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108 parsedMethod = OrthancPluginHttpMethod_Put;
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109 }
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110 else if (lowerCaseMethod == "delete")
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111 {
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112 parsedMethod = OrthancPluginHttpMethod_Delete;
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113 }
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114 else if (lowerCaseMethod == "get")
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115 {
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116 parsedMethod = OrthancPluginHttpMethod_Get;
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117 }
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118 else
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119 {
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120 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange, std::string("Invalid HTTP method ") + method);
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121 }
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122
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123 std::string regex = patternRegex;
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124 std::string strippedDicomWebRoot = dicomWebRoot_;
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125
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126 StripLeadingAndTrailingSlashes(strippedDicomWebRoot);
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127 Replace(regex, "DICOM_WEB_ROOT", strippedDicomWebRoot);
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128
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129 LOG(WARNING) << "Authorization plugin: adding a new permission pattern: " << lowerCaseMethod << " " << regex << " - " << permission;
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130
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131 permissionsPattern_.push_back(PermissionPattern(parsedMethod, regex, permission));
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132 }
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133
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134 bool PermissionParser::Parse(std::set<std::string>& permissions,
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135 std::string& matchedPattern,
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136 const OrthancPluginHttpMethod& method,
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137 const std::string& uri) const
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138 {
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139 // The mutex below should not be necessary, but we prefer to
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140 // ensure thread safety in boost::regex
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141 boost::mutex::scoped_lock lock(mutex_);
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142
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143
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144 for (std::list<PermissionPattern>::const_iterator it = permissionsPattern_.begin();
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145 it != permissionsPattern_.end(); ++it)
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146 {
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147 if (method == it->method)
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148 {
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149 boost::smatch what;
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150 if (boost::regex_match(uri, what, it->pattern))
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151 {
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152 matchedPattern = it->pattern.expression();
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153 permissions = it->permissions;
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154 return true;
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155 }
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156 }
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157 }
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158
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159 return false;
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160 }
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161 }
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