From e4fc4d7bc47f5082a084415e237d39e40dd701be Mon Sep 17 00:00:00 2001 From: Yaakov Selkowitz Date: Mon, 27 Nov 2017 23:14:15 -0600 Subject: [PATCH] ssp: add Object Size Checking for string.h The implementation is from NetBSD, with the addition of mempcpy (a GNU extension) for parity with glibc and libssp. Signed-off-by: Yaakov Selkowitz --- newlib/libc/include/ssp/string.h | 115 +++++++++++++++++++++++++++++++ newlib/libc/include/string.h | 4 ++ newlib/libc/ssp/memcpy_chk.c | 54 +++++++++++++++ newlib/libc/ssp/memmove_chk.c | 50 ++++++++++++++ newlib/libc/ssp/mempcpy_chk.c | 21 ++++++ newlib/libc/ssp/memset_chk.c | 49 +++++++++++++ newlib/libc/ssp/stpcpy_chk.c | 58 ++++++++++++++++ newlib/libc/ssp/stpncpy_chk.c | 56 +++++++++++++++ newlib/libc/ssp/strcat_chk.c | 62 +++++++++++++++++ newlib/libc/ssp/strcpy_chk.c | 55 +++++++++++++++ newlib/libc/ssp/strncat_chk.c | 73 ++++++++++++++++++++ newlib/libc/ssp/strncpy_chk.c | 55 +++++++++++++++ 12 files changed, 652 insertions(+) create mode 100644 newlib/libc/include/ssp/string.h create mode 100644 newlib/libc/ssp/memcpy_chk.c create mode 100644 newlib/libc/ssp/memmove_chk.c create mode 100644 newlib/libc/ssp/mempcpy_chk.c create mode 100644 newlib/libc/ssp/memset_chk.c create mode 100644 newlib/libc/ssp/stpcpy_chk.c create mode 100644 newlib/libc/ssp/stpncpy_chk.c create mode 100644 newlib/libc/ssp/strcat_chk.c create mode 100644 newlib/libc/ssp/strcpy_chk.c create mode 100644 newlib/libc/ssp/strncat_chk.c create mode 100644 newlib/libc/ssp/strncpy_chk.c diff --git a/newlib/libc/include/ssp/string.h b/newlib/libc/include/ssp/string.h new file mode 100644 index 000000000..85c4512ac --- /dev/null +++ b/newlib/libc/include/ssp/string.h @@ -0,0 +1,115 @@ +/* $NetBSD: string.h,v 1.13 2014/11/29 13:23:48 pooka Exp $ */ + +/*- + * Copyright (c) 2006 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Christos Zoulas. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#ifndef _SSP_STRING_H_ +#define _SSP_STRING_H_ + +#include +#include + +__BEGIN_DECLS +void *__memcpy_chk(void *, const void *, size_t, size_t); +void *__memmove_chk(void *, void *, size_t, size_t); +void *__mempcpy_chk(void *, const void *, size_t, size_t); +void *__memset_chk(void *, int, size_t, size_t); +char *__stpcpy_chk(char *, const char *, size_t); +char *__strcat_chk(char *, const char *, size_t); +char *__strcpy_chk(char *, const char *, size_t); +char *__strncat_chk(char *, const char *, size_t, size_t); +char *__strncpy_chk(char *, const char *, size_t, size_t); +__END_DECLS + +#if __SSP_FORTIFY_LEVEL > 0 + +#define __ssp_bos_check3(fun, dst, src, len) \ + ((__ssp_bos0(dst) != (size_t)-1) ? \ + __builtin___ ## fun ## _chk(dst, src, len, __ssp_bos0(dst)) : \ + __ ## fun ## _ichk(dst, src, len)) + +#define __ssp_bos_check2(fun, dst, src) \ + ((__ssp_bos0(dst) != (size_t)-1) ? \ + __builtin___ ## fun ## _chk(dst, src, __ssp_bos0(dst)) : \ + __ ## fun ## _ichk(dst, src)) + +#define __ssp_bos_icheck3_restrict(fun, type1, type2) \ +__ssp_inline type1 __ ## fun ## _ichk(type1 __restrict, type2 __restrict, size_t); \ +__ssp_inline type1 \ +__ ## fun ## _ichk(type1 __restrict dst, type2 __restrict src, size_t len) { \ + return __builtin___ ## fun ## _chk(dst, src, len, __ssp_bos0(dst)); \ +} + +#define __ssp_bos_icheck3(fun, type1, type2) \ +__ssp_inline type1 __ ## fun ## _ichk(type1, type2, size_t); \ +__ssp_inline type1 \ +__ ## fun ## _ichk(type1 dst, type2 src, size_t len) { \ + return __builtin___ ## fun ## _chk(dst, src, len, __ssp_bos0(dst)); \ +} + +#define __ssp_bos_icheck2_restrict(fun, type1, type2) \ +__ssp_inline type1 __ ## fun ## _ichk(type1, type2); \ +__ssp_inline type1 \ +__ ## fun ## _ichk(type1 __restrict dst, type2 __restrict src) { \ + return __builtin___ ## fun ## _chk(dst, src, __ssp_bos0(dst)); \ +} + +__BEGIN_DECLS +__ssp_bos_icheck3_restrict(memcpy, void *, const void *) +__ssp_bos_icheck3(memmove, void *, const void *) +__ssp_bos_icheck3_restrict(mempcpy, void *, const void *) +__ssp_bos_icheck3(memset, void *, int) +__ssp_bos_icheck2_restrict(stpcpy, char *, const char *) +#if __GNUC_PREREQ__(4,8) || defined(__clang__) +__ssp_bos_icheck3_restrict(stpncpy, char *, const char *) +#endif +__ssp_bos_icheck2_restrict(strcpy, char *, const char *) +__ssp_bos_icheck2_restrict(strcat, char *, const char *) +__ssp_bos_icheck3_restrict(strncpy, char *, const char *) +__ssp_bos_icheck3_restrict(strncat, char *, const char *) +__END_DECLS + +#define memcpy(dst, src, len) __ssp_bos_check3(memcpy, dst, src, len) +#define memmove(dst, src, len) __ssp_bos_check3(memmove, dst, src, len) +#if __GNU_VISIBLE +#define mempcpy(dst, src, len) __ssp_bos_check3(mempcpy, dst, src, len) +#endif +#define memset(dst, val, len) __ssp_bos_check3(memset, dst, val, len) +#if __POSIX_VISIBLE >= 200809 +#define stpcpy(dst, src) __ssp_bos_check2(stpcpy, dst, src) +#if __GNUC_PREREQ__(4,8) || defined(__clang__) +#define stpncpy(dst, src, len) __ssp_bos_check3(stpncpy, dst, src, len) +#endif +#endif +#define strcpy(dst, src) __ssp_bos_check2(strcpy, dst, src) +#define strcat(dst, src) __ssp_bos_check2(strcat, dst, src) +#define strncpy(dst, src, len) __ssp_bos_check3(strncpy, dst, src, len) +#define strncat(dst, src, len) __ssp_bos_check3(strncat, dst, src, len) + +#endif /* __SSP_FORTIFY_LEVEL > 0 */ +#endif /* _SSP_STRING_H_ */ diff --git a/newlib/libc/include/string.h b/newlib/libc/include/string.h index 57db7742b..b54b83335 100644 --- a/newlib/libc/include/string.h +++ b/newlib/libc/include/string.h @@ -176,4 +176,8 @@ char *_EXFUN(__nonnull ((1)) basename,(const char *)) __asm__(__ASMNAME("__gnu_b _END_STD_C +#if __SSP_FORTIFY_LEVEL > 0 +#include +#endif + #endif /* _STRING_H_ */ diff --git a/newlib/libc/ssp/memcpy_chk.c b/newlib/libc/ssp/memcpy_chk.c new file mode 100644 index 000000000..63f536dc5 --- /dev/null +++ b/newlib/libc/ssp/memcpy_chk.c @@ -0,0 +1,54 @@ +/* $NetBSD: memcpy_chk.c,v 1.7 2015/05/13 19:57:16 joerg Exp $ */ + +/*- + * Copyright (c) 2006 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Christos Zoulas. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#include +__RCSID("$NetBSD: memcpy_chk.c,v 1.7 2015/05/13 19:57:16 joerg Exp $"); + +/*LINTLIBRARY*/ + +#include +#include + +#undef memcpy + +void *__memcpy_chk(void * __restrict, const void * __restrict, size_t, size_t); + +void * +__memcpy_chk(void * __restrict dst, const void * __restrict src, size_t len, + size_t slen) +{ + if (len > slen) + __chk_fail(); + + if (__ssp_overlap((const char *)src, (const char *)dst, len)) + __chk_fail(); + + return memcpy(dst, src, len); +} diff --git a/newlib/libc/ssp/memmove_chk.c b/newlib/libc/ssp/memmove_chk.c new file mode 100644 index 000000000..f8f03d778 --- /dev/null +++ b/newlib/libc/ssp/memmove_chk.c @@ -0,0 +1,50 @@ +/* $NetBSD: memmove_chk.c,v 1.5 2014/09/17 00:39:28 joerg Exp $ */ + +/*- + * Copyright (c) 2006 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Christos Zoulas. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#include +__RCSID("$NetBSD: memmove_chk.c,v 1.5 2014/09/17 00:39:28 joerg Exp $"); + +/*LINTLIBRARY*/ + +#include +#include + +#undef memmove + +void *__memmove_chk(void *, void *src, size_t, size_t); + +void * +__memmove_chk(void *dst, void *src, size_t len, + size_t slen) +{ + if (len > slen) + __chk_fail(); + return memmove(dst, src, len); +} diff --git a/newlib/libc/ssp/mempcpy_chk.c b/newlib/libc/ssp/mempcpy_chk.c new file mode 100644 index 000000000..fc2ccf894 --- /dev/null +++ b/newlib/libc/ssp/mempcpy_chk.c @@ -0,0 +1,21 @@ +#define _GNU_SOURCE +#include +#include +#include + +#undef mempcpy + +void *__mempcpy_chk(void * __restrict, const void * __restrict, size_t, size_t); + +void * +__mempcpy_chk(void * __restrict dst, const void * __restrict src, size_t len, + size_t slen) +{ + if (len > slen) + __chk_fail(); + + if (__ssp_overlap((const char *)src, (const char *)dst, len)) + __chk_fail(); + + return mempcpy(dst, src, len); +} diff --git a/newlib/libc/ssp/memset_chk.c b/newlib/libc/ssp/memset_chk.c new file mode 100644 index 000000000..0e303b9eb --- /dev/null +++ b/newlib/libc/ssp/memset_chk.c @@ -0,0 +1,49 @@ +/* $NetBSD: memset_chk.c,v 1.5 2014/09/17 00:39:28 joerg Exp $ */ + +/*- + * Copyright (c) 2006 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Christos Zoulas. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#include +__RCSID("$NetBSD: memset_chk.c,v 1.5 2014/09/17 00:39:28 joerg Exp $"); + +/*LINTLIBRARY*/ + +#include +#include + +#undef memset + +void *__memset_chk(void * __restrict, int, size_t, size_t); + +void * +__memset_chk(void * __restrict dst, int val, size_t len, size_t slen) +{ + if (len > slen) + __chk_fail(); + return memset(dst, val, len); +} diff --git a/newlib/libc/ssp/stpcpy_chk.c b/newlib/libc/ssp/stpcpy_chk.c new file mode 100644 index 000000000..ed1d74ad7 --- /dev/null +++ b/newlib/libc/ssp/stpcpy_chk.c @@ -0,0 +1,58 @@ +/* $NetBSD: stpcpy_chk.c,v 1.6 2015/05/09 15:42:21 christos Exp $ */ + +/*- + * Copyright (c) 2013 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Christos Zoulas. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#include +__RCSID("$NetBSD: stpcpy_chk.c,v 1.6 2015/05/09 15:42:21 christos Exp $"); + +/*LINTLIBRARY*/ + +#include +#include + +#undef memcpy + +#if !__GNUC_PREREQ__(4, 8) +char *__stpcpy_chk(char * __restrict, const char * __restrict, size_t); +#endif + +char * +__stpcpy_chk(char * __restrict dst, const char * __restrict src, size_t slen) +{ + size_t len = strlen(src); + + if (len >= slen) + __chk_fail(); + + if (__ssp_overlap(src, dst, len)) + __chk_fail(); + + (void)memcpy(dst, src, len + 1); + return dst + len; +} diff --git a/newlib/libc/ssp/stpncpy_chk.c b/newlib/libc/ssp/stpncpy_chk.c new file mode 100644 index 000000000..756626153 --- /dev/null +++ b/newlib/libc/ssp/stpncpy_chk.c @@ -0,0 +1,56 @@ +/* $NetBSD: stpncpy_chk.c,v 1.3 2015/05/09 15:42:21 christos Exp $ */ + +/*- + * Copyright (c) 2013 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Christos Zoulas. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#include +__RCSID("$NetBSD: stpncpy_chk.c,v 1.3 2015/05/09 15:42:21 christos Exp $"); + +/*LINTLIBRARY*/ + +#include +#include + +#undef stpncpy + +#if !__GNUC_PREREQ__(4, 8) +char *__stpncpy_chk(char * __restrict, const char * __restrict, size_t, size_t); +#endif + +char * +__stpncpy_chk(char * __restrict dst, const char * __restrict src, size_t len, + size_t slen) +{ + if (len > slen) + __chk_fail(); + + if (__ssp_overlap(src, dst, len)) + __chk_fail(); + + return stpncpy(dst, src, len); +} diff --git a/newlib/libc/ssp/strcat_chk.c b/newlib/libc/ssp/strcat_chk.c new file mode 100644 index 000000000..d57f9559b --- /dev/null +++ b/newlib/libc/ssp/strcat_chk.c @@ -0,0 +1,62 @@ +/* $NetBSD: strcat_chk.c,v 1.5 2014/09/17 00:39:28 joerg Exp $ */ + +/*- + * Copyright (c) 2006 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Christos Zoulas. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#include +__RCSID("$NetBSD: strcat_chk.c,v 1.5 2014/09/17 00:39:28 joerg Exp $"); + +/*LINTLIBRARY*/ + +#include +#include + +char *__strcat_chk(char * __restrict, const char * __restrict, size_t); + +char * +__strcat_chk(char * __restrict dst, const char * __restrict src, size_t slen) +{ + char *d; + + for (d = dst; *d; d++) { + if (slen-- == 0) + __chk_fail(); + } + + while (*src) { + if (slen-- == 0) + __chk_fail(); + *d++ = *src++; + } + + if (slen-- == 0) + __chk_fail(); + + *d = '\0'; + return dst; +} diff --git a/newlib/libc/ssp/strcpy_chk.c b/newlib/libc/ssp/strcpy_chk.c new file mode 100644 index 000000000..cef160a62 --- /dev/null +++ b/newlib/libc/ssp/strcpy_chk.c @@ -0,0 +1,55 @@ +/* $NetBSD: strcpy_chk.c,v 1.8 2015/05/09 15:42:21 christos Exp $ */ + +/*- + * Copyright (c) 2006 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Christos Zoulas. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#include +__RCSID("$NetBSD: strcpy_chk.c,v 1.8 2015/05/09 15:42:21 christos Exp $"); + +/*LINTLIBRARY*/ + +#include +#include + +#undef memcpy + +char *__strcpy_chk(char * __restrict, const char * __restrict, size_t); + +char * +__strcpy_chk(char * __restrict dst, const char * __restrict src, size_t slen) +{ + size_t len = strlen(src) + 1; + + if (len > slen) + __chk_fail(); + + if (__ssp_overlap(src, dst, len)) + __chk_fail(); + + return memcpy(dst, src, len); +} diff --git a/newlib/libc/ssp/strncat_chk.c b/newlib/libc/ssp/strncat_chk.c new file mode 100644 index 000000000..5ce5a9ef6 --- /dev/null +++ b/newlib/libc/ssp/strncat_chk.c @@ -0,0 +1,73 @@ +/* $NetBSD: strncat_chk.c,v 1.5 2014/09/17 00:39:28 joerg Exp $ */ + +/*- + * Copyright (c) 2006 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Christos Zoulas. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#include +__RCSID("$NetBSD: strncat_chk.c,v 1.5 2014/09/17 00:39:28 joerg Exp $"); + +/*LINTLIBRARY*/ + +#include +#include +#include + +char *__strncat_chk(char * __restrict, const char * __restrict, size_t, + size_t); + +char * +__strncat_chk(char * __restrict dst, const char * __restrict src, size_t len, + size_t slen) +{ + char *d; + + if (len == 0) + return dst; + + if (len > slen) + __chk_fail(); + + for (d = dst; *d; d++) { + if (slen-- == 0) + __chk_fail(); + } + + do { + if ((*d = *src++) == '\0') + break; + if (slen-- == 0) + __chk_fail(); + d++; + } while (--len != 0); + + if (slen-- == 0) + __chk_fail(); + + *d = '\0'; + return dst; +} diff --git a/newlib/libc/ssp/strncpy_chk.c b/newlib/libc/ssp/strncpy_chk.c new file mode 100644 index 000000000..591157a25 --- /dev/null +++ b/newlib/libc/ssp/strncpy_chk.c @@ -0,0 +1,55 @@ +/* $NetBSD: strncpy_chk.c,v 1.6 2015/05/09 15:42:21 christos Exp $ */ + +/*- + * Copyright (c) 2006 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Christos Zoulas. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#include +__RCSID("$NetBSD: strncpy_chk.c,v 1.6 2015/05/09 15:42:21 christos Exp $"); + +/*LINTLIBRARY*/ + +#include +#include + +#undef strncpy + +char *__strncpy_chk(char * __restrict, const char * __restrict, size_t, + size_t); + +char * +__strncpy_chk(char * __restrict dst, const char * __restrict src, size_t len, + size_t slen) +{ + if (len > slen) + __chk_fail(); + + if (__ssp_overlap(src, dst, len)) + __chk_fail(); + + return strncpy(dst, src, len); +}