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_ */