contrib/libarchive/libarchive/archive_write_set_passphrase.c

   1 /*-
   2  * Copyright (c) 2014 Michihiro NAKAJIMA
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  17  * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
  18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "archive_platform.h"
  27 __FBSDID("$FreeBSD$");
  28
  29 #ifdef HAVE_ERRNO_H
  30 #include <errno.h>
  31 #endif
  32 #include "archive_write_private.h"
  33
  34 int
  35 archive_write_set_passphrase(struct archive *_a, const char *p)
  36 {
  37         struct archive_write *a = (struct archive_write *)_a;
  38
  39         archive_check_magic(_a, ARCHIVE_WRITE_MAGIC, ARCHIVE_STATE_NEW,
  40                 "archive_write_set_passphrase");
  41
  42         if (p == NULL || p[0] == '\0') {
  43                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  44                     "Empty passphrase is unacceptable");
  45                 return (ARCHIVE_FAILED);
  46         }
  47         free(a->passphrase);
  48         a->passphrase = strdup(p);
  49         if (a->passphrase == NULL) {
  50                 archive_set_error(&a->archive, ENOMEM,
  51                     "Can't allocate data for passphrase");
  52                 return (ARCHIVE_FATAL);
  53         }
  54         return (ARCHIVE_OK);
  55 }
  56
  57
  58 int
  59 archive_write_set_passphrase_callback(struct archive *_a, void *client_data,
  60     archive_passphrase_callback *cb)
  61 {
  62         struct archive_write *a = (struct archive_write *)_a;
  63
  64         archive_check_magic(_a, ARCHIVE_WRITE_MAGIC, ARCHIVE_STATE_NEW,
  65                 "archive_write_set_passphrase_callback");
  66
  67         a->passphrase_callback = cb;
  68         a->passphrase_client_data = client_data;
  69         return (ARCHIVE_OK);
  70 }
  71
  72
  73 const char *
  74 __archive_write_get_passphrase(struct archive_write *a)
  75 {
  76
  77         if (a->passphrase != NULL)
  78                 return (a->passphrase);
  79
  80         if (a->passphrase_callback != NULL) {
  81                 const char *p;
  82                 p = a->passphrase_callback(&a->archive,
  83                     a->passphrase_client_data);
  84                 if (p != NULL) {
  85                         a->passphrase = strdup(p);
  86                         if (a->passphrase == NULL) {
  87                                 archive_set_error(&a->archive, ENOMEM,
  88                                     "Can't allocate data for passphrase");
  89                                 return (NULL);
  90                         }
  91                         return (a->passphrase);
  92                 }
  93         }
  94         return (NULL);
  95 }