mirror of
https://github.com/cryb-to/cryb-to.git
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Implement a memcpy_s() equivalent.
This commit is contained in:
parent
bf624acec1
commit
c73fd34d97
8 changed files with 429 additions and 2 deletions
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@ -118,7 +118,7 @@ AC_CHECK_FUNCS([setrlimit])
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# C11 features
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# C11 features
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# XXX our version has an incorrect prototype due to the lack of a test
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# XXX our version has an incorrect prototype due to the lack of a test
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# for the existence of rsize_t and RSIZE_MAX.
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# for the existence of rsize_t and RSIZE_MAX.
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AC_CHECK_FUNCS([memset_s])
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AC_CHECK_FUNCS([memcpy_s memset_s])
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############################################################################
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############################################################################
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#
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#
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@ -22,6 +22,7 @@ cryb_HEADERS += \
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ctype.h \
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ctype.h \
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defs.h \
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defs.h \
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endian.h \
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endian.h \
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memcpy_s.h \
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memset_s.h \
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memset_s.h \
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strchrnul.h \
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strchrnul.h \
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string.h \
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string.h \
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40
include/cryb/memcpy_s.h
Normal file
40
include/cryb/memcpy_s.h
Normal file
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@ -0,0 +1,40 @@
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/*-
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* Copyright (c) 2015 The University of Oslo
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef CRYB_MEMCPY_S_H_INCLUDED
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#define CRYB_MEMCPY_S_H_INCLUDED
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int cryb_memcpy_s(void *, size_t, const void *, size_t);
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#if !HAVE_MEMCPY_S
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#undef memcpy_s
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#define memcpy_s(arg, ...) cryb_memcpy_s(arg, __VA_ARGS__)
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#endif
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#endif
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@ -4,6 +4,7 @@ lib_LTLIBRARIES = libcryb-core.la
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libcryb_core_la_SOURCES = \
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libcryb_core_la_SOURCES = \
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cryb_assert.c \
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cryb_assert.c \
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cryb_memcpy_s.c \
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cryb_memset_s.c \
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cryb_memset_s.c \
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cryb_strchrnul.c \
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cryb_strchrnul.c \
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cryb_string.c \
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cryb_string.c \
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77
lib/core/cryb_memcpy_s.c
Normal file
77
lib/core/cryb_memcpy_s.c
Normal file
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@ -0,0 +1,77 @@
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/*-
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* Copyright (c) 2015 Dag-Erling Smørgrav
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <errno.h>
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#include <limits.h>
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#include <stdint.h>
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#include <string.h>
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#include <cryb/coverage.h>
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#include <cryb/memcpy_s.h>
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#include <cryb/memset_s.h>
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/*
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* Like memcpy(), but checks for overflow and overwrites the destination
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* range with zeroes on error.
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*/
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int
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cryb_memcpy_s(void *d, size_t dsz, const void *s, size_t n)
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{
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unsigned int i;
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/* unrecoverable errors */
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if (d == NULL)
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return (EINVAL);
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CRYB_DISABLE_COVERAGE
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if (dsz > SIZE_MAX)
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return (ERANGE);
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CRYB_RESTORE_COVERAGE
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/* recoverable errors */
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if (s == NULL || n > dsz ||
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CRYB_DISABLE_COVERAGE
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n > SIZE_MAX ||
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CRYB_RESTORE_COVERAGE
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(s >= d && s < d + dsz) || (d >= s && d < s + n)) {
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memset_s(d, dsz, 0, dsz);
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if (n > dsz)
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return (EOVERFLOW);
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CRYB_DISABLE_COVERAGE
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if (n > SIZE_MAX)
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return (ERANGE);
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CRYB_RESTORE_COVERAGE
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return (EINVAL);
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}
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for (i = 0; i < dsz && i < n; ++i)
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((volatile unsigned char *)d)[i] = ((unsigned char *)s)[i];
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return (0);
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}
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1
t/.gitignore
vendored
1
t/.gitignore
vendored
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@ -29,6 +29,7 @@
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/t_md4_openssl
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/t_md4_openssl
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/t_md5
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/t_md5
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/t_md5_openssl
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/t_md5_openssl
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/t_memcpy_s
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/t_memset_s
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/t_memset_s
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/t_mpi
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/t_mpi
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/t_mpi_addsub
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/t_mpi_addsub
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@ -94,9 +94,12 @@ TESTS += t_core
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t_core_LDADD = $(libt) $(libcore)
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t_core_LDADD = $(libt) $(libcore)
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TESTS += t_assert
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TESTS += t_assert
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t_assert_LDADD = $(libt) $(libcore)
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t_assert_LDADD = $(libt) $(libcore)
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TESTS += t_ctype t_endian t_memset_s t_strchrnul t_strlcat t_strlcmp t_strlcpy
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TESTS += t_ctype t_endian t_memcpy_s t_memset_s t_strchrnul t_strlcat t_strlcmp t_strlcpy
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TESTS += t_string t_wstring
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EXTRA_DIST += t__string.c
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t_ctype_LDADD = $(libt) $(libcore)
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t_ctype_LDADD = $(libt) $(libcore)
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t_endian_LDADD = $(libt) $(libcore)
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t_endian_LDADD = $(libt) $(libcore)
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t_memcpy_s_LDADD = $(libt) $(libcore)
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t_memset_s_LDADD = $(libt) $(libcore)
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t_memset_s_LDADD = $(libt) $(libcore)
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t_strchrnul_LDADD = $(libt) $(libcore)
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t_strchrnul_LDADD = $(libt) $(libcore)
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t_strlcat_LDADD = $(libt) $(libcore)
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t_strlcat_LDADD = $(libt) $(libcore)
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304
t/t_memcpy_s.c
Normal file
304
t/t_memcpy_s.c
Normal file
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@ -0,0 +1,304 @@
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/*-
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* Copyright (c) 2015 Dag-Erling Smørgrav
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "cryb/impl.h"
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#include <errno.h>
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#include <stdint.h>
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#include <string.h>
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#include <unistd.h>
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#undef HAVE_MEMCPY_S
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#include <cryb/memcpy_s.h>
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#include <cryb/strlcpy.h>
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#include <cryb/test.h>
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#define T_BUF_LEN 40
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struct t_plain_case {
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const char *desc;
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const char in[T_BUF_LEN];
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size_t dsz;
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const char s[T_BUF_LEN];
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size_t len;
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const char out[T_BUF_LEN];
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size_t outlen;
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int ret;
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};
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/***************************************************************************
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* Plain test cases
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*/
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static struct t_plain_case t_plain_cases[] = {
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{
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.desc = "zero",
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.in = "squeamish ossifrage",
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.dsz = sizeof "squeamish ossifrage" - 1,
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.s = "",
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.len = 0,
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.out = "squeamish ossifrage",
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.ret = 0,
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},
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{
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.desc = "short",
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.in = "squeamish ossifrage",
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.dsz = sizeof "squeamish ossifrage" - 1,
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.s = "the quick",
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.len = sizeof "the quick" - 1,
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.out = "the quick ossifrage",
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.ret = 0,
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},
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{
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.desc = "exact",
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.in = "squeamish ossifrage",
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.dsz = sizeof "squeamish ossifrage" - 1,
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.s = "the quick brown fox",
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.len = sizeof "the quick brown fox" - 1,
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.out = "the quick brown fox",
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.ret = 0,
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},
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{
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.desc = "long",
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.in = "squeamish ossifrage",
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.dsz = sizeof "squeamish ossifrage" - 1,
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.s = "the quick brown fox jumps",
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.len = sizeof "the quick brown fox jumps" + 1,
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.out = "",
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.ret = EOVERFLOW,
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},
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};
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static int
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t_memcpy_s(char **desc CRYB_UNUSED, void *arg)
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{
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struct t_plain_case *t = arg;
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char buf[T_BUF_LEN];
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int ret;
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memset(buf, 0, sizeof buf);
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strlcpy(buf, t->in, T_BUF_LEN);
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ret = memcpy_s(buf, t->dsz, t->s, t->len);
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return (t_compare_i(t->ret, ret) &
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t_compare_mem(t->out, buf, T_BUF_LEN));
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}
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/***************************************************************************
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* Overlapping test cases
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*/
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struct t_overlap_case {
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const char *desc;
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const char *in;
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size_t s_off, s_len, d_off, d_len;
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const char out[T_BUF_LEN];
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int ret;
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};
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static struct t_overlap_case t_overlap_cases[] = {
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{
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/* [<<<<<<<<<< >>>>>>>>>>] */
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.desc = "left, disjoint",
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.in = "the magic words are squeamish ossifrage",
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.s_off = 0,
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.s_len = 15,
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.d_off = 16,
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.d_len = 23,
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.out = "the magic words the magic wordsssifrage",
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.ret = 0,
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},
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{
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/* [<<<<<<<<<<>>>>>>>>>>] */
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.desc = "left, adjoining",
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.in = "the magic words are squeamish ossifrage",
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.s_off = 0,
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.s_len = 16,
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.d_off = 16,
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.d_len = 23,
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.out = "the magic words the magic words sifrage",
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.ret = 0,
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},
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{
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/* [>>>>>>>>>> <<<<<<<<<<] */
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.desc = "right, disjoint",
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.in = "the magic words are squeamish ossifrage",
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.s_off = 20,
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.s_len = 19,
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.d_off = 0,
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.d_len = 19,
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.out = "squeamish ossifrage squeamish ossifrage",
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.ret = 0,
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},
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{
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/* [>>>>>>>>>><<<<<<<<<<] */
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.desc = "right, adjoining",
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.in = "the magic words are squeamish ossifrage",
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.s_off = 20,
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.s_len = 19,
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.d_off = 0,
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.d_len = 19,
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.out = "squeamish ossifrage squeamish ossifrage",
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.ret = 0,
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},
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{
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/* [<<<<<<<<XXXX>>>>>>>>] */
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.desc = "left, overlapping",
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.in = "the magic words are squeamish ossifrage",
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.s_off = 4,
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.s_len = 15,
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.d_off = 16,
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.d_len = 23,
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.out = "the magic words ",
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.ret = EINVAL,
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},
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{
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/* [>>>>>>>>XXXX<<<<<<<<] */
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.desc = "right, overlapping",
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.in = "the magic words are squeamish ossifrage",
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.s_off = 16,
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.s_len = 23,
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.d_off = 0,
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||||||
|
.d_len = 29,
|
||||||
|
.out = "\0\0\0\0\0\0\0\0\0\0"
|
||||||
|
"\0\0\0\0\0\0\0\0\0\0"
|
||||||
|
"\0\0\0\0\0\0\0\0\0"
|
||||||
|
" ossifrage",
|
||||||
|
.ret = EINVAL,
|
||||||
|
},
|
||||||
|
{
|
||||||
|
/* [>>>>>>>>XXXX>>>>>>>>] */
|
||||||
|
.desc = "inside",
|
||||||
|
.in = "the magic words are squeamish ossifrage",
|
||||||
|
.s_off = 10,
|
||||||
|
.s_len = 19,
|
||||||
|
.d_off = 0,
|
||||||
|
.d_len = 39,
|
||||||
|
.out = "",
|
||||||
|
.ret = EINVAL,
|
||||||
|
},
|
||||||
|
{
|
||||||
|
/* [<<<<<<<<XXXX<<<<<<<<] */
|
||||||
|
/* caught by n > sz before overlap is noticed */
|
||||||
|
.desc = "outside",
|
||||||
|
.in = "the magic words are squeamish ossifrage",
|
||||||
|
.s_off = 0,
|
||||||
|
.s_len = 39,
|
||||||
|
.d_off = 10,
|
||||||
|
.d_len = 19,
|
||||||
|
.out = "the magic "
|
||||||
|
"\0\0\0\0\0\0\0\0\0\0"
|
||||||
|
"\0\0\0\0\0\0\0\0\0"
|
||||||
|
" ossifrage",
|
||||||
|
.ret = EOVERFLOW,
|
||||||
|
},
|
||||||
|
{
|
||||||
|
/* [XXXXXXXXXXXXXXXXXXXX] */
|
||||||
|
.desc = "full overlap",
|
||||||
|
.in = "the magic words are squeamish ossifrage",
|
||||||
|
.s_off = 10,
|
||||||
|
.s_len = 19,
|
||||||
|
.d_off = 10,
|
||||||
|
.d_len = 19,
|
||||||
|
.out = "the magic "
|
||||||
|
"\0\0\0\0\0\0\0\0\0\0"
|
||||||
|
"\0\0\0\0\0\0\0\0\0"
|
||||||
|
" ossifrage",
|
||||||
|
.ret = EINVAL,
|
||||||
|
},
|
||||||
|
};
|
||||||
|
|
||||||
|
static int
|
||||||
|
t_memcpy_s_overlap(char **desc CRYB_UNUSED, void *arg)
|
||||||
|
{
|
||||||
|
struct t_overlap_case *t = arg;
|
||||||
|
char buf[T_BUF_LEN];
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
strlcpy(buf, t->in, sizeof buf);
|
||||||
|
ret = memcpy_s(buf + t->d_off, t->d_len, buf + t->s_off, t->s_len);
|
||||||
|
return (t_compare_i(t->ret, ret) &
|
||||||
|
t_compare_mem(t->out, buf, T_BUF_LEN));
|
||||||
|
}
|
||||||
|
|
||||||
|
/***************************************************************************
|
||||||
|
* NULL cases
|
||||||
|
*/
|
||||||
|
static int
|
||||||
|
t_memcpy_s_null_d(char **desc CRYB_UNUSED, void *arg)
|
||||||
|
{
|
||||||
|
char buf[T_BUF_LEN];
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
(void)arg;
|
||||||
|
memset(buf, 'x', sizeof buf);
|
||||||
|
ret = memcpy_s(NULL, sizeof buf, buf, sizeof buf);
|
||||||
|
return (t_compare_i(EINVAL, ret));
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
t_memcpy_s_null_s(char **desc CRYB_UNUSED, void *arg)
|
||||||
|
{
|
||||||
|
char buf[T_BUF_LEN];
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
(void)arg;
|
||||||
|
memset(buf, 0, sizeof buf);
|
||||||
|
ret = memcpy_s(buf, sizeof buf, NULL, sizeof buf);
|
||||||
|
return (t_compare_i(EINVAL, ret) &
|
||||||
|
t_compare_mem(buf, t_zero, sizeof buf));
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
/***************************************************************************
|
||||||
|
* Boilerplate
|
||||||
|
*/
|
||||||
|
|
||||||
|
int
|
||||||
|
t_prepare(int argc, char *argv[])
|
||||||
|
{
|
||||||
|
int i, n;
|
||||||
|
|
||||||
|
(void)argc;
|
||||||
|
(void)argv;
|
||||||
|
t_add_test(t_memcpy_s_null_s, NULL, "null source");
|
||||||
|
t_add_test(t_memcpy_s_null_d, NULL, "null destination");
|
||||||
|
n = sizeof t_plain_cases / sizeof t_plain_cases[0];
|
||||||
|
for (i = 0; i < n; ++i)
|
||||||
|
t_add_test(t_memcpy_s, &t_plain_cases[i],
|
||||||
|
t_plain_cases[i].desc);
|
||||||
|
n = sizeof t_overlap_cases / sizeof t_overlap_cases[0];
|
||||||
|
for (i = 0; i < n; ++i)
|
||||||
|
t_add_test(t_memcpy_s_overlap, &t_overlap_cases[i],
|
||||||
|
t_overlap_cases[i].desc);
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
t_cleanup(void)
|
||||||
|
{
|
||||||
|
}
|
Loading…
Reference in a new issue