comparison: application/config.c
application/config.c
- changeset 6
- 09ac07345656
- child 7
- 905ac52c910f
equal
deleted
inserted
replaced
| 5:83263002816f | 6:09ac07345656 |
|---|---|
| 1 /* | |
| 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. | |
| 3 * | |
| 4 * Copyright 2024 Olaf Wintermann. All rights reserved. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions are met: | |
| 8 * | |
| 9 * 1. Redistributions of source code must retain the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer. | |
| 11 * | |
| 12 * 2. Redistributions in binary form must reproduce the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer in the | |
| 14 * documentation and/or other materials provided with the distribution. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
| 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 26 * POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 #include <stdio.h> | |
| 30 #include <stdlib.h> | |
| 31 #include <string.h> | |
| 32 #include <sys/types.h> | |
| 33 #include <cx/hash_map.h> | |
| 34 #include <cx/utils.h> | |
| 35 #include <errno.h> | |
| 36 #include <libxml/tree.h> | |
| 37 | |
| 38 #include "pwd.h" | |
| 39 #include "config.h" | |
| 40 #include "system.h" | |
| 41 | |
| 42 #include <libidav/utils.h> | |
| 43 #include <libidav/config.h> | |
| 44 | |
| 45 #define xstreq(a,b) xmlStrEqual(BAD_CAST a, BAD_CAST b) | |
| 46 #define xstrEQ(a,b) !xmlStrcasecmp(BAD_CAST a, BAD_CAST b) | |
| 47 | |
| 48 #define print_error(lineno, ...) \ | |
| 49 do {\ | |
| 50 fprintf(stderr, "Error (config.xml line %u): ", lineno); \ | |
| 51 fprintf(stderr, __VA_ARGS__); \ | |
| 52 fprintf(stderr, "Abort.\n"); \ | |
| 53 } while(0); | |
| 54 #define print_warning(lineno, ...) \ | |
| 55 do {\ | |
| 56 fprintf(stderr, "Warning (config.xml line %u): ", lineno); \ | |
| 57 fprintf(stderr, __VA_ARGS__); \ | |
| 58 } while(0); | |
| 59 | |
| 60 #ifdef _WIN32 | |
| 61 #define ENV_HOME getenv("USERPROFILE") | |
| 62 #else | |
| 63 #define ENV_HOME getenv("HOME") | |
| 64 #endif /* _WIN32 */ | |
| 65 | |
| 66 static CxMap* repos; | |
| 67 static CxMap* keys; | |
| 68 | |
| 69 static DavConfig* davconfig; | |
| 70 static PwdStore* pstore; | |
| 71 | |
| 72 static char* secretstore_unlock_cmd; | |
| 73 static char* secretstore_lock_cmd; | |
| 74 | |
| 75 int check_config_dir(void) { | |
| 76 char* file = util_concat_path(ENV_HOME, ".dav"); | |
| 77 int ret = 0; | |
| 78 if (util_mkdir(file, S_IRWXU)) { | |
| 79 if (errno != EEXIST) { | |
| 80 ret = 1; | |
| 81 } | |
| 82 } | |
| 83 free(file); | |
| 84 return ret; | |
| 85 } | |
| 86 | |
| 87 static DavContext* context; | |
| 88 | |
| 89 void create_default_config(char* file) { | |
| 90 xmlDoc* doc = xmlNewDoc(BAD_CAST "1.0"); | |
| 91 xmlNode* root = xmlNewNode(NULL, BAD_CAST "configuration"); | |
| 92 xmlDocSetRootElement(doc, root); | |
| 93 xmlSaveFormatFileEnc(file, doc, "UTF-8", 1); | |
| 94 xmlFreeDoc(doc); | |
| 95 } | |
| 96 | |
| 97 char* config_file_path(char* name) { | |
| 98 char* davd = util_concat_path(ENV_HOME, ".dav"); | |
| 99 if (!davd) { | |
| 100 return NULL; | |
| 101 } | |
| 102 char* path = util_concat_path(davd, name); | |
| 103 free(davd); | |
| 104 return path; | |
| 105 } | |
| 106 | |
| 107 cxmutstr config_load_file(const char* path) { | |
| 108 FILE* file = sys_fopen(path, "r"); | |
| 109 if (!file) { | |
| 110 return (cxmutstr) { NULL, 0 }; | |
| 111 } | |
| 112 | |
| 113 CxBuffer buf; | |
| 114 cxBufferInit(&buf, NULL, 1024, cxDefaultAllocator, CX_BUFFER_AUTO_EXTEND); | |
| 115 cx_stream_copy(file, &buf, (cx_read_func)fread, (cx_write_func)cxBufferWrite); | |
| 116 fclose(file); | |
| 117 | |
| 118 return cx_mutstrn(buf.space, buf.size); | |
| 119 } | |
| 120 | |
| 121 int load_config(DavContext* ctx) { | |
| 122 context = ctx; | |
| 123 // TODO: free the config somewhere | |
| 124 repos = cxHashMapCreate(cxDefaultAllocator, CX_STORE_POINTERS, 16); | |
| 125 keys = cxHashMapCreate(cxDefaultAllocator, CX_STORE_POINTERS, 16); | |
| 126 | |
| 127 char* pwfile = util_concat_path(ENV_HOME, ".dav/secrets.crypt"); | |
| 128 pstore = pwdstore_open(pwfile); | |
| 129 free(pwfile); | |
| 130 | |
| 131 char* file = util_concat_path(ENV_HOME, ".dav/config.xml"); | |
| 132 | |
| 133 struct stat s; | |
| 134 if (stat(file, &s)) { | |
| 135 switch (errno) { | |
| 136 case ENOENT: { | |
| 137 return 0; | |
| 138 } | |
| 139 default: { | |
| 140 perror("Cannot load config.xml"); | |
| 141 } | |
| 142 } | |
| 143 return 1; | |
| 144 } | |
| 145 | |
| 146 cxmutstr config_content = config_load_file(file); | |
| 147 int config_error; | |
| 148 davconfig = dav_config_load(config_content, &config_error); | |
| 149 free(config_content.ptr); | |
| 150 free(file); | |
| 151 | |
| 152 if (!davconfig) { | |
| 153 fprintf(stderr, "Cannot load config.xml\n"); | |
| 154 return 1; | |
| 155 } | |
| 156 | |
| 157 return dav_config_register_keys(davconfig, ctx, load_key_file); | |
| 158 } | |
| 159 | |
| 160 DavConfig* get_config(void) { | |
| 161 return davconfig; | |
| 162 } | |
| 163 | |
| 164 int store_config(void) { | |
| 165 if (check_config_dir()) { | |
| 166 return 1; | |
| 167 } | |
| 168 | |
| 169 CxBuffer* buf = dav_config2buf(davconfig); | |
| 170 if (!buf) { | |
| 171 return 1; | |
| 172 } | |
| 173 | |
| 174 char* file = util_concat_path(ENV_HOME, ".dav/config.xml"); | |
| 175 FILE* cout = sys_fopen(file, "w"); | |
| 176 if (!cout) { | |
| 177 cxBufferFree(buf); | |
| 178 return 1; | |
| 179 } | |
| 180 | |
| 181 // should only fail if we run out of disk space or something like that | |
| 182 // in that case, the config file is only destroyed | |
| 183 // could only be prevented, if we write to a temp file first and than | |
| 184 // rename it | |
| 185 fwrite(buf->space, buf->size, 1, cout); | |
| 186 | |
| 187 cxBufferFree(buf); | |
| 188 fclose(cout); | |
| 189 | |
| 190 return 0; | |
| 191 } | |
| 192 | |
| 193 void free_config(void) { | |
| 194 if (davconfig) { | |
| 195 dav_config_free(davconfig); | |
| 196 } | |
| 197 } | |
| 198 | |
| 199 cxmutstr load_key_file(const char* filename) { | |
| 200 cxmutstr k; | |
| 201 k.ptr = NULL; | |
| 202 k.length = 0; | |
| 203 | |
| 204 FILE* file = NULL; | |
| 205 if (filename[0] == '/') { | |
| 206 file = sys_fopen(filename, "r"); | |
| 207 } | |
| 208 else { | |
| 209 char* path = util_concat_path(ENV_HOME, ".dav/"); | |
| 210 char* p2 = util_concat_path(path, filename); | |
| 211 file = sys_fopen(p2, "r"); | |
| 212 free(path); | |
| 213 free(p2); | |
| 214 } | |
| 215 | |
| 216 if (!file) { | |
| 217 fprintf(stderr, "Error: cannot load keyfile %s\n", filename); | |
| 218 return k; | |
| 219 } | |
| 220 | |
| 221 char* data = malloc(256); | |
| 222 size_t r = fread(data, 1, 256, file); | |
| 223 k.ptr = data; | |
| 224 k.length = r; | |
| 225 | |
| 226 fclose(file); | |
| 227 return k; | |
| 228 } | |
| 229 | |
| 230 static char* get_attr_content(xmlNode* node) { | |
| 231 // TODO: remove code duplication (util_xml_get_text) | |
| 232 while (node) { | |
| 233 if (node->type == XML_TEXT_NODE) { | |
| 234 return (char*)node->content; | |
| 235 } | |
| 236 node = node->next; | |
| 237 } | |
| 238 return NULL; | |
| 239 } | |
| 240 | |
| 241 int load_namespace(const xmlNode* node) { | |
| 242 const char* prefix = NULL; | |
| 243 const char* uri = NULL; | |
| 244 | |
| 245 xmlAttr* attr = node->properties; | |
| 246 while (attr) { | |
| 247 if (attr->type == XML_ATTRIBUTE_NODE) { | |
| 248 char* value = get_attr_content(attr->children); | |
| 249 if (!value) { | |
| 250 print_error( | |
| 251 node->line, | |
| 252 "missing value for attribute %s\n", (char*)attr->name); | |
| 253 return 1; | |
| 254 } | |
| 255 if (xstreq(attr->name, "prefix")) { | |
| 256 prefix = value; | |
| 257 } | |
| 258 else if (xstreq(attr->name, "uri")) { | |
| 259 uri = value; | |
| 260 } | |
| 261 else { | |
| 262 print_error( | |
| 263 node->line, | |
| 264 "unexpected attribute %s\n", (char*)attr->name); | |
| 265 return 1; | |
| 266 } | |
| 267 } | |
| 268 attr = attr->next; | |
| 269 } | |
| 270 | |
| 271 if (!prefix) { | |
| 272 print_error(node->line, "missing prefix attribute\n"); | |
| 273 return 1; | |
| 274 } | |
| 275 if (!uri) { | |
| 276 print_error(node->line, "missing uri attribute\n"); | |
| 277 return 1; | |
| 278 } | |
| 279 | |
| 280 if (dav_get_namespace(context, prefix)) { | |
| 281 print_error(node->line, "namespace prefix '%s' already used\n", prefix); | |
| 282 return 1; | |
| 283 } | |
| 284 | |
| 285 return dav_add_namespace(context, prefix, uri); | |
| 286 } | |
| 287 | |
| 288 int load_secretstore(const xmlNode* node) { | |
| 289 // currently only one secretstore is supported | |
| 290 | |
| 291 if (!pstore) { | |
| 292 return 0; | |
| 293 } | |
| 294 | |
| 295 node = node->children; | |
| 296 int error = 0; | |
| 297 while (node) { | |
| 298 if (node->type == XML_ELEMENT_NODE) { | |
| 299 char* value = util_xml_get_text(node); | |
| 300 if (value) { | |
| 301 if (xstreq(node->name, "unlock-command")) { | |
| 302 pstore->unlock_cmd = strdup(value); | |
| 303 } | |
| 304 else if (xstreq(node->name, "lock-command")) { | |
| 305 pstore->lock_cmd = strdup(value); | |
| 306 } | |
| 307 } | |
| 308 } | |
| 309 node = node->next; | |
| 310 } | |
| 311 | |
| 312 return error; | |
| 313 } | |
| 314 | |
| 315 PwdStore* get_pwdstore(void) { | |
| 316 return pstore; | |
| 317 } | |
| 318 | |
| 319 int pwdstore_save(PwdStore* pwdstore) { | |
| 320 if (check_config_dir()) { | |
| 321 return 1; | |
| 322 } | |
| 323 | |
| 324 char* pwfile = util_concat_path(ENV_HOME, ".dav/secrets.crypt"); | |
| 325 int ret = pwdstore_store(pwdstore, pwfile); | |
| 326 free(pwfile); | |
| 327 return ret; | |
| 328 } |
