include/secure/_string.h

   1 /*
   2  * Copyright (c) 2007,2017 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #ifndef _STRING_H_
  25 # error "Never use <secure/_string.h> directly; include <string.h> instead."
  26 #endif
  27
  28 #ifndef _SECURE__STRING_H_
  29 #define _SECURE__STRING_H_
  30
  31 #include <sys/cdefs.h>
  32 #include <Availability.h>
  33 #include <secure/_common.h>
  34
  35 #if _USE_FORTIFY_LEVEL > 0
  36
  37 /* <rdar://problem/12622659> */
  38 #if defined(__clang__) && \
  39                 ((defined(__apple_build_version__) && __apple_build_version__ >= 4260006) || \
  40                 (!defined(__apple_build_version__) && (__clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 3))))
  41 #define __HAS_FIXED_CHK_PROTOTYPES 1
  42 #else
  43 #define __HAS_FIXED_CHK_PROTOTYPES 0
  44 #endif
  45
  46 /* memccpy, memcpy, mempcpy, memmove, memset, strcpy, strlcpy, stpcpy,
  47    strncpy, stpncpy, strcat, strlcat, and strncat */
  48
  49 #if __IPHONE_OS_VERSION_MIN_REQUIRED >= 70000 || __MAC_OS_X_VERSION_MIN_REQUIRED >= 1090 || \
  50                 defined(__DRIVERKIT_VERSION_MIN_REQUIRED)
  51 #if __has_builtin(__builtin___memccpy_chk) && __HAS_FIXED_CHK_PROTOTYPES
  52 #undef memccpy
  53 /* void *memccpy(void *dst, const void *src, int c, size_t n) */
  54 #define memccpy(dest, ...) \
  55                 __builtin___memccpy_chk (dest, __VA_ARGS__, __darwin_obsz0 (dest))
  56 #endif
  57 #endif
  58
  59 #if __has_builtin(__builtin___memcpy_chk) || defined(__GNUC__)
  60 #undef memcpy
  61 /* void *memcpy(void *dst, const void *src, size_t n) */
  62 #define memcpy(dest, ...) \
  63                 __builtin___memcpy_chk (dest, __VA_ARGS__, __darwin_obsz0 (dest))
  64 #endif
  65
  66 #if __has_builtin(__builtin___memmove_chk) || defined(__GNUC__)
  67 #undef memmove
  68 /* void *memmove(void *dst, const void *src, size_t len) */
  69 #define memmove(dest, ...) \
  70                 __builtin___memmove_chk (dest, __VA_ARGS__, __darwin_obsz0 (dest))
  71 #endif
  72
  73 #if __has_builtin(__builtin___memset_chk) || defined(__GNUC__)
  74 #undef memset
  75 /* void *memset(void *b, int c, size_t len) */
  76 #define memset(dest, ...) \
  77                 __builtin___memset_chk (dest, __VA_ARGS__, __darwin_obsz0 (dest))
  78 #endif
  79
  80 #ifndef UNIFDEF_DRIVERKIT
  81 #if __has_builtin(__builtin___strcpy_chk) || defined(__GNUC__)
  82 #undef strcpy
  83 /* char *strcpy(char *dst, const char *src) */
  84 #define strcpy(dest, ...) \
  85                 __builtin___strcpy_chk (dest, __VA_ARGS__, __darwin_obsz (dest))
  86 #endif
  87
  88 #if __DARWIN_C_LEVEL >= 200809L
  89 #if __has_builtin(__builtin___stpcpy_chk) || defined(__GNUC__)
  90 #undef stpcpy
  91 /* char *stpcpy(char *dst, const char *src) */
  92 #define stpcpy(dest, ...) \
  93                 __builtin___stpcpy_chk (dest, __VA_ARGS__, __darwin_obsz (dest))
  94 #endif
  95 #endif /* __DARWIN_C_LEVEL >= 200809L */
  96 #endif /* UNIFDEF_DRIVERKIT */
  97
  98 #if __DARWIN_C_LEVEL >= 200809L
  99 #if __has_builtin(__builtin___stpncpy_chk) || __APPLE_CC__ >= 5666 || __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7)
 100 #undef stpncpy
 101 /* char *stpncpy(char *dst, const char *src, size_t n) */
 102 #define stpncpy(dest, ...) \
 103                 __builtin___stpncpy_chk (dest, __VA_ARGS__, __darwin_obsz (dest))
 104 #endif
 105 #endif /* _DARWIN_C_LEVEL >= 200809L */
 106
 107 #if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
 108 #if __IPHONE_OS_VERSION_MIN_REQUIRED >= 70000 || __MAC_OS_X_VERSION_MIN_REQUIRED >= 1090 || \
 109                 defined(__DRIVERKIT_VERSION_MIN_REQUIRED)
 110 #if __has_builtin(__builtin___strlcpy_chk) && __HAS_FIXED_CHK_PROTOTYPES
 111 #undef strlcpy
 112 /* size_t strlcpy(char *dst, const char *source, size_t size) */
 113 #define strlcpy(dest, ...) \
 114                 __builtin___strlcpy_chk (dest, __VA_ARGS__, __darwin_obsz (dest))
 115 #endif
 116
 117 #if __has_builtin(__builtin___strlcat_chk) && __HAS_FIXED_CHK_PROTOTYPES
 118 #undef strlcat
 119 /* size_t strlcat(char *dst, const char *source, size_t size) */
 120 #define strlcat(dest, ...) \
 121                 __builtin___strlcat_chk (dest, __VA_ARGS__, __darwin_obsz (dest))
 122 #endif
 123 #endif /* __IPHONE_OS_VERSION_MIN_REQUIRED >= 70000 || __MAC_OS_X_VERSION_MIN_REQUIRED >= 1090 */
 124 #endif /* __DARWIN_C_LEVEL >= __DARWIN_C_FULL */
 125
 126 #if __has_builtin(__builtin___strncpy_chk) || defined(__GNUC__)
 127 #undef strncpy
 128 /* char *strncpy(char *dst, const char *src, size_t n) */
 129 #define strncpy(dest, ...) \
 130                 __builtin___strncpy_chk (dest, __VA_ARGS__, __darwin_obsz (dest))
 131 #endif
 132
 133 #ifndef UNIFDEF_DRIVERKIT
 134 #if __has_builtin(__builtin___strcat_chk) || defined(__GNUC__)
 135 #undef strcat
 136 /* char *strcat(char *s1, const char *s2) */
 137 #define strcat(dest, ...) \
 138                 __builtin___strcat_chk (dest, __VA_ARGS__, __darwin_obsz (dest))
 139 #endif
 140 #endif /* UNIFDEF_DRIVERKIT */
 141
 142 #if ! (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED < 32000)
 143 #if __has_builtin(__builtin___strncat_chk) || defined(__GNUC__)
 144 #undef strncat
 145 /* char *strncat(char *s1, const char *s2, size_t n) */
 146 #define strncat(dest, ...) \
 147                 __builtin___strncat_chk (dest, __VA_ARGS__, __darwin_obsz (dest))
 148 #endif
 149 #endif
 150
 151 #undef __HAS_FIXED_CHK_PROTOTYPES
 152
 153 #endif /* _USE_FORTIFY_LEVEL > 0 */
 154 #endif /* _SECURE__STRING_H_ */