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Member "src/Common/libzip/zip_set_name.c" (10 Oct 2018, 4545 Bytes) of package /windows/misc/VeraCrypt_1.23-Hotfix-2_Source.zip:


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    1 /*
    2   zip_set_name.c -- rename helper function
    3   Copyright (C) 1999-2016 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 <stdlib.h>
   36 #include <string.h>
   37 
   38 #include "zipint.h"
   39 
   40 
   41 int
   42 _zip_set_name(zip_t *za, zip_uint64_t idx, const char *name, zip_flags_t flags) {
   43     zip_entry_t *e;
   44     zip_string_t *str;
   45     bool same_as_orig;
   46     zip_int64_t i;
   47     const zip_uint8_t *old_name, *new_name;
   48     zip_string_t *old_str;
   49 
   50     if (idx >= za->nentry) {
   51     zip_error_set(&za->error, ZIP_ER_INVAL, 0);
   52     return -1;
   53     }
   54 
   55     if (ZIP_IS_RDONLY(za)) {
   56     zip_error_set(&za->error, ZIP_ER_RDONLY, 0);
   57     return -1;
   58     }
   59 
   60     if (name && name[0] != '\0') {
   61     /* TODO: check for string too long */
   62     if ((str = _zip_string_new((const zip_uint8_t *)name, (zip_uint16_t)strlen(name), flags, &za->error)) == NULL)
   63         return -1;
   64     if ((flags & ZIP_FL_ENCODING_ALL) == ZIP_FL_ENC_GUESS && _zip_guess_encoding(str, ZIP_ENCODING_UNKNOWN) == ZIP_ENCODING_UTF8_GUESSED)
   65         str->encoding = ZIP_ENCODING_UTF8_KNOWN;
   66     }
   67     else
   68     str = NULL;
   69 
   70     /* TODO: encoding flags needed for CP437? */
   71     if ((i = _zip_name_locate(za, name, 0, NULL)) >= 0 && (zip_uint64_t)i != idx) {
   72     _zip_string_free(str);
   73     zip_error_set(&za->error, ZIP_ER_EXISTS, 0);
   74     return -1;
   75     }
   76 
   77     /* no effective name change */
   78     if (i >= 0 && (zip_uint64_t)i == idx) {
   79     _zip_string_free(str);
   80     return 0;
   81     }
   82 
   83     e = za->entry + idx;
   84 
   85     if (e->orig)
   86     same_as_orig = _zip_string_equal(e->orig->filename, str);
   87     else
   88     same_as_orig = false;
   89 
   90     if (!same_as_orig && e->changes == NULL) {
   91     if ((e->changes = _zip_dirent_clone(e->orig)) == NULL) {
   92         zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
   93         _zip_string_free(str);
   94         return -1;
   95     }
   96     }
   97 
   98     if ((new_name = _zip_string_get(same_as_orig ? e->orig->filename : str, NULL, 0, &za->error)) == NULL) {
   99     _zip_string_free(str);
  100     return -1;
  101     }
  102 
  103     if (e->changes) {
  104     old_str = e->changes->filename;
  105     }
  106     else if (e->orig) {
  107     old_str = e->orig->filename;
  108     }
  109     else {
  110     old_str = NULL;
  111     }
  112 
  113     if (old_str) {
  114     if ((old_name = _zip_string_get(old_str, NULL, 0, &za->error)) == NULL) {
  115         _zip_string_free(str);
  116         return -1;
  117     }
  118     }
  119     else {
  120     old_name = NULL;
  121     }
  122 
  123     if (_zip_hash_add(za->names, new_name, idx, 0, &za->error) == false) {
  124     _zip_string_free(str);
  125     return -1;
  126     }
  127     if (old_name) {
  128     _zip_hash_delete(za->names, old_name, NULL);
  129     }
  130 
  131     if (same_as_orig) {
  132     if (e->changes) {
  133         if (e->changes->changed & ZIP_DIRENT_FILENAME) {
  134         _zip_string_free(e->changes->filename);
  135         e->changes->changed &= ~ZIP_DIRENT_FILENAME;
  136         if (e->changes->changed == 0) {
  137             _zip_dirent_free(e->changes);
  138             e->changes = NULL;
  139         }
  140         else {
  141             /* TODO: what if not cloned? can that happen? */
  142             e->changes->filename = e->orig->filename;
  143         }
  144         }
  145     }
  146     _zip_string_free(str);
  147     }
  148     else {
  149     if (e->changes->changed & ZIP_DIRENT_FILENAME) {
  150         _zip_string_free(e->changes->filename);
  151     }
  152     e->changes->changed |= ZIP_DIRENT_FILENAME;
  153     e->changes->filename = str;
  154     }
  155 
  156     return 0;
  157 }