VeraCrypt_1.23-Hotfix-2_Source.zip: .../zip_extra_field_api.c

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Member "src/Common/libzip/zip_extra_field_api.c" (10 Oct 2018, 8847 Bytes) of package /windows/misc/VeraCrypt_1.23-Hotfix-2_Source.zip:

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1 /* 2 zip_extra_field_api.c -- public extra fields API functions 3 Copyright (C) 2012-2014 Dieter Baron and Thomas Klausner 4 5 This file is part of libzip, a library to manipulate ZIP archives. 6 The authors can be contacted at <libzip@nih.at> 7 8 Redistribution and use in source and binary forms, with or without 9 modification, are permitted provided that the following conditions 10 are met: 11 1. Redistributions of source code must retain the above copyright 12 notice, this list of conditions and the following disclaimer. 13 2. Redistributions in binary form must reproduce the above copyright 14 notice, this list of conditions and the following disclaimer in 15 the documentation and/or other materials provided with the 16 distribution. 17 3. The names of the authors may not be used to endorse or promote 18 products derived from this software without specific prior 19 written permission. 20 21 THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS 22 OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 23 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY 25 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 27 GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 29 IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 31 IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 35 #include "zipint.h" 36 37 38 ZIP_EXTERN int 39 zip_file_extra_field_delete(zip_t *za, zip_uint64_t idx, zip_uint16_t ef_idx, zip_flags_t flags) { 40 zip_dirent_t *de; 41 42 if ((flags & ZIP_EF_BOTH) == 0) { 43 zip_error_set(&za->error, ZIP_ER_INVAL, 0); 44 return -1; 45 } 46 47 if (((flags & ZIP_EF_BOTH) == ZIP_EF_BOTH) && (ef_idx != ZIP_EXTRA_FIELD_ALL)) { 48 zip_error_set(&za->error, ZIP_ER_INVAL, 0); 49 return -1; 50 } 51 52 if (_zip_get_dirent(za, idx, 0, NULL) == NULL) 53 return -1; 54 55 if (ZIP_IS_RDONLY(za)) { 56 zip_error_set(&za->error, ZIP_ER_RDONLY, 0); 57 return -1; 58 } 59 60 if (_zip_file_extra_field_prepare_for_change(za, idx) < 0) 61 return -1; 62 63 de = za->entry[idx].changes; 64 65 de->extra_fields = _zip_ef_delete_by_id(de->extra_fields, ZIP_EXTRA_FIELD_ALL, ef_idx, flags); 66 return 0; 67 } 68 69 70 ZIP_EXTERN int 71 zip_file_extra_field_delete_by_id(zip_t *za, zip_uint64_t idx, zip_uint16_t ef_id, zip_uint16_t ef_idx, zip_flags_t flags) { 72 zip_dirent_t *de; 73 74 if ((flags & ZIP_EF_BOTH) == 0) { 75 zip_error_set(&za->error, ZIP_ER_INVAL, 0); 76 return -1; 77 } 78 79 if (((flags & ZIP_EF_BOTH) == ZIP_EF_BOTH) && (ef_idx != ZIP_EXTRA_FIELD_ALL)) { 80 zip_error_set(&za->error, ZIP_ER_INVAL, 0); 81 return -1; 82 } 83 84 if (_zip_get_dirent(za, idx, 0, NULL) == NULL) 85 return -1; 86 87 if (ZIP_IS_RDONLY(za)) { 88 zip_error_set(&za->error, ZIP_ER_RDONLY, 0); 89 return -1; 90 } 91 92 if (_zip_file_extra_field_prepare_for_change(za, idx) < 0) 93 return -1; 94 95 de = za->entry[idx].changes; 96 97 de->extra_fields = _zip_ef_delete_by_id(de->extra_fields, ef_id, ef_idx, flags); 98 return 0; 99 } 100 101 102 ZIP_EXTERN const zip_uint8_t * 103 zip_file_extra_field_get(zip_t *za, zip_uint64_t idx, zip_uint16_t ef_idx, zip_uint16_t *idp, zip_uint16_t *lenp, zip_flags_t flags) { 104 static const zip_uint8_t empty[1] = {'\0'}; 105 106 zip_dirent_t *de; 107 zip_extra_field_t *ef; 108 int i; 109 110 if ((flags & ZIP_EF_BOTH) == 0) { 111 zip_error_set(&za->error, ZIP_ER_INVAL, 0); 112 return NULL; 113 } 114 115 if ((de = _zip_get_dirent(za, idx, flags, &za->error)) == NULL) 116 return NULL; 117 118 if (flags & ZIP_FL_LOCAL) 119 if (_zip_read_local_ef(za, idx) < 0) 120 return NULL; 121 122 i = 0; 123 for (ef = de->extra_fields; ef; ef = ef->next) { 124 if (ef->flags & flags & ZIP_EF_BOTH) { 125 if (i < ef_idx) { 126 i++; 127 continue; 128 } 129 130 if (idp) 131 *idp = ef->id; 132 if (lenp) 133 *lenp = ef->size; 134 if (ef->size > 0) 135 return ef->data; 136 else 137 return empty; 138 } 139 } 140 141 zip_error_set(&za->error, ZIP_ER_NOENT, 0); 142 return NULL; 143 } 144 145 146 ZIP_EXTERN const zip_uint8_t * 147 zip_file_extra_field_get_by_id(zip_t *za, zip_uint64_t idx, zip_uint16_t ef_id, zip_uint16_t ef_idx, zip_uint16_t *lenp, zip_flags_t flags) { 148 zip_dirent_t *de; 149 150 if ((flags & ZIP_EF_BOTH) == 0) { 151 zip_error_set(&za->error, ZIP_ER_INVAL, 0); 152 return NULL; 153 } 154 155 if ((de = _zip_get_dirent(za, idx, flags, &za->error)) == NULL) 156 return NULL; 157 158 if (flags & ZIP_FL_LOCAL) 159 if (_zip_read_local_ef(za, idx) < 0) 160 return NULL; 161 162 return _zip_ef_get_by_id(de->extra_fields, lenp, ef_id, ef_idx, flags, &za->error); 163 } 164 165 166 ZIP_EXTERN zip_int16_t 167 zip_file_extra_fields_count(zip_t *za, zip_uint64_t idx, zip_flags_t flags) { 168 zip_dirent_t *de; 169 zip_extra_field_t *ef; 170 zip_uint16_t n; 171 172 if ((flags & ZIP_EF_BOTH) == 0) { 173 zip_error_set(&za->error, ZIP_ER_INVAL, 0); 174 return -1; 175 } 176 177 if ((de = _zip_get_dirent(za, idx, flags, &za->error)) == NULL) 178 return -1; 179 180 if (flags & ZIP_FL_LOCAL) 181 if (_zip_read_local_ef(za, idx) < 0) 182 return -1; 183 184 n = 0; 185 for (ef = de->extra_fields; ef; ef = ef->next) 186 if (ef->flags & flags & ZIP_EF_BOTH) 187 n++; 188 189 return (zip_int16_t)n; 190 } 191 192 193 ZIP_EXTERN zip_int16_t 194 zip_file_extra_fields_count_by_id(zip_t *za, zip_uint64_t idx, zip_uint16_t ef_id, zip_flags_t flags) { 195 zip_dirent_t *de; 196 zip_extra_field_t *ef; 197 zip_uint16_t n; 198 199 if ((flags & ZIP_EF_BOTH) == 0) { 200 zip_error_set(&za->error, ZIP_ER_INVAL, 0); 201 return -1; 202 } 203 204 if ((de = _zip_get_dirent(za, idx, flags, &za->error)) == NULL) 205 return -1; 206 207 if (flags & ZIP_FL_LOCAL) 208 if (_zip_read_local_ef(za, idx) < 0) 209 return -1; 210 211 n = 0; 212 for (ef = de->extra_fields; ef; ef = ef->next) 213 if (ef->id == ef_id && (ef->flags & flags & ZIP_EF_BOTH)) 214 n++; 215 216 return (zip_int16_t)n; 217 } 218 219 220 ZIP_EXTERN int 221 zip_file_extra_field_set(zip_t *za, zip_uint64_t idx, zip_uint16_t ef_id, zip_uint16_t ef_idx, const zip_uint8_t *data, zip_uint16_t len, zip_flags_t flags) { 222 zip_dirent_t *de; 223 zip_uint16_t ls, cs; 224 zip_extra_field_t *ef, *ef_prev, *ef_new; 225 int i, found, new_len; 226 227 if ((flags & ZIP_EF_BOTH) == 0) { 228 zip_error_set(&za->error, ZIP_ER_INVAL, 0); 229 return -1; 230 } 231 232 if (_zip_get_dirent(za, idx, 0, NULL) == NULL) 233 return -1; 234 235 if (ZIP_IS_RDONLY(za)) { 236 zip_error_set(&za->error, ZIP_ER_RDONLY, 0); 237 return -1; 238 } 239 240 if (ZIP_EF_IS_INTERNAL(ef_id)) { 241 zip_error_set(&za->error, ZIP_ER_INVAL, 0); 242 return -1; 243 } 244 245 if (_zip_file_extra_field_prepare_for_change(za, idx) < 0) 246 return -1; 247 248 de = za->entry[idx].changes; 249 250 ef = de->extra_fields; 251 ef_prev = NULL; 252 i = 0; 253 found = 0; 254 255 for (; ef; ef = ef->next) { 256 if (ef->id == ef_id && (ef->flags & flags & ZIP_EF_BOTH)) { 257 if (i == ef_idx) { 258 found = 1; 259 break; 260 } 261 i++; 262 } 263 ef_prev = ef; 264 } 265 266 if (i < ef_idx && ef_idx != ZIP_EXTRA_FIELD_NEW) { 267 zip_error_set(&za->error, ZIP_ER_INVAL, 0); 268 return -1; 269 } 270 271 if (flags & ZIP_EF_LOCAL) 272 ls = _zip_ef_size(de->extra_fields, ZIP_EF_LOCAL); 273 else 274 ls = 0; 275 if (flags & ZIP_EF_CENTRAL) 276 cs = _zip_ef_size(de->extra_fields, ZIP_EF_CENTRAL); 277 else 278 cs = 0; 279 280 new_len = ls > cs ? ls : cs; 281 if (found) 282 new_len -= ef->size + 4; 283 new_len += len + 4; 284 285 if (new_len > ZIP_UINT16_MAX) { 286 zip_error_set(&za->error, ZIP_ER_INVAL, 0); 287 return -1; 288 } 289 290 if ((ef_new = _zip_ef_new(ef_id, len, data, flags)) == NULL) { 291 zip_error_set(&za->error, ZIP_ER_MEMORY, 0); 292 return -1; 293 } 294 295 if (found) { 296 if ((ef->flags & ZIP_EF_BOTH) == (flags & ZIP_EF_BOTH)) { 297 ef_new->next = ef->next; 298 ef->next = NULL; 299 _zip_ef_free(ef); 300 if (ef_prev) 301 ef_prev->next = ef_new; 302 else 303 de->extra_fields = ef_new; 304 } 305 else { 306 ef->flags &= ~(flags & ZIP_EF_BOTH); 307 ef_new->next = ef->next; 308 ef->next = ef_new; 309 } 310 } 311 else if (ef_prev) { 312 ef_new->next = ef_prev->next; 313 ef_prev->next = ef_new; 314 } 315 else 316 de->extra_fields = ef_new; 317 318 return 0; 319 } 320 321 322 int 323 _zip_file_extra_field_prepare_for_change(zip_t *za, zip_uint64_t idx) { 324 zip_entry_t *e; 325 326 if (idx >= za->nentry) { 327 zip_error_set(&za->error, ZIP_ER_INVAL, 0); 328 return -1; 329 } 330 331 e = za->entry + idx; 332 333 if (e->changes && (e->changes->changed & ZIP_DIRENT_EXTRA_FIELD)) 334 return 0; 335 336 if (e->orig) { 337 if (_zip_read_local_ef(za, idx) < 0) 338 return -1; 339 } 340 341 if (e->changes == NULL) { 342 if ((e->changes = _zip_dirent_clone(e->orig)) == NULL) { 343 zip_error_set(&za->error, ZIP_ER_MEMORY, 0); 344 return -1; 345 } 346 } 347 348 if (e->orig && e->orig->extra_fields) { 349 if ((e->changes->extra_fields = _zip_ef_clone(e->orig->extra_fields, &za->error)) == NULL) 350 return -1; 351 } 352 e->changes->changed |= ZIP_DIRENT_EXTRA_FIELD; 353 354 return 0; 355 }