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1 | /* |
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2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. |
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3 | * |
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4 | * Copyright 2013 Olaf Wintermann. All rights reserved. |
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5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions are met: |
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8 | * |
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9 | * 1. Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * |
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16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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26 | * POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |
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29 | #include <stdio.h> |
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30 | #include <stdlib.h> |
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31 | #include <string.h> |
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32 | #include <sys/types.h> |
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33 | #include <ucx/map.h> |
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34 | #include <errno.h> |
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35 | #include <libxml/tree.h> |
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36 | |
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37 | #include "config.h" |
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38 | #include <libidav/utils.h> |
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39 | |
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40 | #define xstreq(a,b) xmlStrEqual(BAD_CAST a, BAD_CAST b) |
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41 | |
32 | 42 | #ifdef _WIN32 |
43 | #define ENV_HOME getenv("USERPROFILE") | |
44 | #else | |
45 | #define ENV_HOME getenv("HOME") | |
46 | #endif /* _WIN32 */ | |
47 | ||
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48 | static UcxMap *repos; |
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49 | static UcxMap *keys; |
36 | 50 | static Proxy *http_proxy; |
51 | static Proxy *https_proxy; | |
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52 | |
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53 | int check_config_dir() { |
32 | 54 | char *file = util_concat_path(ENV_HOME, ".dav"); |
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55 | int ret = 0; |
32 | 56 | if(util_mkdir(file, S_IRWXU)) { |
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57 | if(errno != EEXIST) { |
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58 | ret = 1; |
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59 | } |
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60 | } |
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61 | free(file); |
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62 | return ret; |
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63 | } |
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64 | |
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65 | static DavContext *context; |
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66 | |
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67 | void load_config(DavContext *ctx) { |
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68 | context = ctx; |
36 | 69 | // TODO: free the config somewhere |
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70 | repos = ucx_map_new(16); |
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71 | keys = ucx_map_new(16); |
36 | 72 | http_proxy = calloc(1, sizeof(Proxy)); |
73 | https_proxy = calloc(1, sizeof(Proxy)); | |
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74 | if(check_config_dir()) { |
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75 | return; |
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76 | } |
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77 | |
32 | 78 | char *file = util_concat_path(ENV_HOME, ".dav/config.xml"); |
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79 | xmlDoc *doc = xmlReadFile(file, NULL, 0); |
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80 | if(!doc) { |
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81 | doc = xmlNewDoc(BAD_CAST "1.0"); |
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82 | xmlNode *root = xmlNewNode(NULL, BAD_CAST "configuration"); |
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83 | xmlDocSetRootElement(doc, root); |
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84 | xmlSaveFormatFileEnc(file, doc, "UTF-8", 1); |
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85 | xmlFreeDoc(doc); |
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86 | free(file); |
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87 | return; |
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88 | } |
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89 | free(file); |
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90 | |
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91 | xmlNode *xml_root = xmlDocGetRootElement(doc); |
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92 | xmlNode *node = xml_root->children; |
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93 | while(node) { |
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94 | if(node->type == XML_ELEMENT_NODE) { |
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95 | if(xstreq(node->name, "repository")) { |
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96 | load_repository(node); |
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97 | } else if(xstreq(node->name, "key")) { |
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98 | load_key(node); |
36 | 99 | } else if (xstreq(node->name, "http-proxy")) { |
100 | load_proxy(node, HTTP_PROXY); | |
101 | } else if (xstreq(node->name, "https-proxy")) { | |
102 | load_proxy(node, HTTPS_PROXY); | |
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103 | } |
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104 | } |
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105 | node = node->next; |
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106 | } |
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107 | |
9 | 108 | xmlFreeDoc(doc); |
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109 | } |
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110 | |
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111 | void load_repository(xmlNode *reponode) { |
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112 | xmlNode *node = reponode->children; |
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113 | Repository *repo = calloc(1, sizeof(Repository)); |
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114 | repo->encrypt_name = false; |
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115 | repo->encrypt_content = false; |
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116 | repo->decrypt_name = false; |
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117 | repo->decrypt_content = true; |
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118 | while(node) { |
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119 | if(node->type == XML_ELEMENT_NODE) { |
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120 | char *value = util_xml_get_text(node); |
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121 | if(!value) { |
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122 | // next |
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123 | } else if(xstreq(node->name, "name")) { |
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124 | repo->name = strdup(value); |
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125 | } else if(xstreq(node->name, "url")) { |
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126 | repo->url = strdup(value); |
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127 | } else if(xstreq(node->name, "user")) { |
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128 | repo->user = strdup(value); |
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129 | } else if(xstreq(node->name, "password")) { |
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130 | repo->password = util_base64decode(value); |
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131 | } else if(xstreq(node->name, "default-key")) { |
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132 | repo->default_key = strdup(value); |
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133 | } else if(xstreq(node->name, "full-encryption")) { |
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134 | if(util_getboolean(value)) { |
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135 | repo->encrypt_name = true; |
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136 | repo->encrypt_content = true; |
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137 | repo->decrypt_name = true; |
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138 | repo->decrypt_content = true; |
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139 | } |
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140 | } else if(xstreq(node->name, "content-encryption")) { |
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141 | if(util_getboolean(value)) { |
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142 | repo->encrypt_content = true; |
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143 | repo->decrypt_content = true; |
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144 | } else { |
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145 | repo->encrypt_content = false; |
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146 | } |
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147 | } else if(xstreq(node->name, "decrypt-content")) { |
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148 | repo->decrypt_content = util_getboolean(value); |
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149 | } else if(xstreq(node->name, "decrypt-name")) { |
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150 | repo->decrypt_name = util_getboolean(value); |
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151 | } else if(xstreq(node->name, "encrypt") || xstreq(node->name, "store-key-property") || xstreq(node->name, "decrypt")) { |
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152 | fprintf(stderr, "Error: config.xml contains deprecated elements\n"); |
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153 | fprintf(stderr, "The elements <encrypt>, <decrypt> and <store-key-property> are removed\n"); |
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154 | fprintf(stderr, "Use the following: \n\n"); |
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155 | fprintf(stderr, "<content-encryption>true</content-encryption>\n"); |
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156 | fprintf(stderr, "enables file content encryption and decryption\n\n"); |
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157 | fprintf(stderr, "<full-encryption>true</full-encryption>\n"); |
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158 | fprintf(stderr, "enables content and file name encryption/decryption\n\n"); |
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159 | fprintf(stderr, "<decrypt-content>$BOOL</decrypt-content>\n"); |
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160 | fprintf(stderr, "only enables/disables content decryption\n\n"); |
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161 | fprintf(stderr, "<decrypt-name>$BOOL</decrypt-name>\n"); |
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162 | fprintf(stderr, "only enables/disables name decryption\n\n"); |
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163 | exit(-1); |
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164 | } |
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165 | } |
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166 | node = node->next; |
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167 | } |
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168 | |
21 | 169 | if(!repo->name) { |
170 | fprintf( | |
171 | stderr, | |
172 | "Cannot load config.xml: missing name for repository.\n"); | |
173 | fprintf(stderr, "Abort.\n"); | |
174 | exit(-1); | |
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175 | } |
21 | 176 | if(!repo->url) { |
177 | fprintf( | |
178 | stderr, | |
179 | "Cannot load config.xml: " | |
180 | "missing url for repository '%s'.\n", repo->name); | |
181 | fprintf(stderr, "Abort.\n"); | |
182 | exit(-1); | |
183 | } | |
184 | ||
185 | ucx_map_cstr_put(repos, repo->name, repo); | |
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186 | } |
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187 | |
36 | 188 | void load_proxy(xmlNode *proxynode, int type) { |
189 | Proxy *proxy; | |
190 | const char *stype; | |
191 | if (type == HTTPS_PROXY) { | |
192 | proxy = https_proxy; | |
193 | stype = "https"; | |
194 | } else if (type == HTTP_PROXY) { | |
195 | proxy = http_proxy; | |
196 | stype = "http"; | |
197 | } | |
198 | ||
199 | xmlNode *node = proxynode->children; | |
200 | while(node) { | |
201 | if(node->type == XML_ELEMENT_NODE) { | |
202 | char *value = util_xml_get_text(node); | |
203 | if(!value) { | |
204 | // next | |
205 | } else if(xstreq(node->name, "url")) { | |
206 | proxy->url = strdup(value); | |
207 | } else if(xstreq(node->name, "user")) { | |
208 | proxy->user = strdup(value); | |
209 | } else if(xstreq(node->name, "password")) { | |
210 | proxy->password = util_base64decode(value); | |
211 | } else if(xstreq(node->name, "no")) { | |
212 | proxy->no = strdup(value); | |
213 | } | |
214 | } | |
215 | node = node->next; | |
216 | } | |
217 | ||
218 | if(!proxy->url) { | |
219 | fprintf(stderr, | |
220 | "Cannot load config.xml: missing url for %s proxy.\n", stype); | |
221 | fprintf(stderr, "Abort.\n"); | |
222 | exit(-1); | |
223 | } | |
224 | } | |
225 | ||
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226 | void load_key(xmlNode *keynode) { |
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227 | xmlNode *node = keynode->children; |
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228 | Key *key = calloc(1, sizeof(Key)); |
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229 | key->type = KEY_AES256; |
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230 | |
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231 | while(node) { |
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232 | if(node->type == XML_ELEMENT_NODE) { |
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233 | char *value = util_xml_get_text(node); |
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234 | if(!value) { |
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235 | // next |
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236 | } else if(xstreq(node->name, "name")) { |
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237 | key->name = strdup(value); |
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238 | } else if(xstreq(node->name, "file")) { |
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239 | // load key file |
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240 | sstr_t key_data = load_key_file(value); |
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241 | if(key_data.length > 0) { |
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242 | key->data = key_data.ptr; |
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243 | key->length = key_data.length; |
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244 | } |
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245 | } else if(xstreq(node->name, "type")) { |
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246 | if(!strcmp(value, "aes128")) { |
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247 | key->type = KEY_AES128; |
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248 | } else if(!strcmp(value, "aes256")) { |
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249 | key->type = KEY_AES256; |
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250 | } |
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251 | } |
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252 | |
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253 | } |
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254 | node = node->next; |
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255 | } |
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256 | |
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257 | if(key->name) { |
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258 | if(key->type == KEY_AES128) { |
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259 | if(key->length < 16) { |
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260 | return; |
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261 | } |
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262 | key->length = 16; |
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263 | } |
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264 | if(key->type == KEY_AES256) { |
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265 | if(key->length < 32) { |
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266 | return; |
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267 | } |
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268 | key->length = 32; |
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269 | } |
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270 | ucx_map_cstr_put(keys, key->name, key); |
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271 | dav_context_add_key(context, key); |
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272 | } else { |
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273 | // TODO: free |
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274 | } |
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275 | } |
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276 | |
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277 | sstr_t load_key_file(char *filename) { |
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278 | sstr_t k; |
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279 | k.ptr = NULL; |
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280 | k.length = 0; |
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281 | |
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282 | FILE *file = NULL; |
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283 | if(filename[0] == '/') { |
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284 | file = fopen(filename, "r"); |
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285 | } else { |
32 | 286 | char *path = util_concat_path(ENV_HOME, ".dav/"); |
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287 | char *p2 = util_concat_path(path, filename); |
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288 | file = fopen(p2, "r"); |
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289 | free(path); |
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290 | free(p2); |
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291 | } |
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292 | |
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293 | if(!file) { |
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294 | return k; |
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295 | } |
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296 | |
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297 | char *data = malloc(256); |
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298 | size_t r = fread(data, 1, 256, file); |
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299 | k.ptr = data; |
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300 | k.length = r; |
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301 | |
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302 | fclose(file); |
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303 | return k; |
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304 | } |
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305 | |
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306 | Repository* get_repository(sstr_t name) { |
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307 | if(!name.ptr) { |
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308 | return NULL; |
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309 | } |
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310 | return ucx_map_sstr_get(repos, name); |
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311 | } |
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312 | |
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313 | int get_repository_flags(Repository *repo) { |
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314 | int flags = 0; |
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315 | if(repo->decrypt_content) { |
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316 | flags |= DAV_SESSION_DECRYPT_CONTENT; |
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317 | } |
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318 | if(repo->decrypt_name) { |
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319 | flags |= DAV_SESSION_DECRYPT_NAME; |
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320 | } |
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321 | if(repo->encrypt_content) { |
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322 | flags |= DAV_SESSION_ENCRYPT_CONTENT; |
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323 | } |
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324 | if(repo->encrypt_name) { |
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325 | flags |= DAV_SESSION_ENCRYPT_NAME; |
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326 | } |
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327 | return flags; |
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328 | } |
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329 | |
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330 | |
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331 | Key* get_key(char *name) { |
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332 | if(!name) { |
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333 | return NULL; |
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334 | } |
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335 | return ucx_map_cstr_get(keys, name); |
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336 | } |
36 | 337 | |
338 | Proxy* get_http_proxy() { | |
339 | return http_proxy; | |
340 | } | |
341 | ||
342 | Proxy* get_https_proxy() { | |
343 | return https_proxy; | |
344 | } |