From 4bb261b015d382a567563571ae4d399a16caebe2 Mon Sep 17 00:00:00 2001 From: "C. McEnroe" Date: Mon, 27 Jul 2020 21:55:29 -0400 Subject: Import LibreSSL 3.2.0 --- m4/check-libc.m4 | 169 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 169 insertions(+) create mode 100644 m4/check-libc.m4 (limited to 'm4/check-libc.m4') diff --git a/m4/check-libc.m4 b/m4/check-libc.m4 new file mode 100644 index 0000000..e511f6d --- /dev/null +++ b/m4/check-libc.m4 @@ -0,0 +1,169 @@ +AC_DEFUN([CHECK_LIBC_COMPAT], [ +# Check for libc headers +AC_CHECK_HEADERS([err.h readpassphrase.h]) +# Check for general libc functions +AC_CHECK_FUNCS([asprintf freezero memmem]) +AC_CHECK_FUNCS([readpassphrase reallocarray recallocarray]) +AC_CHECK_FUNCS([strlcat strlcpy strndup strnlen strsep strtonum]) +AC_CHECK_FUNCS([timegm _mkgmtime timespecsub]) +AC_CHECK_FUNCS([getprogname syslog syslog_r]) +AC_CACHE_CHECK([for getpagesize], ac_cv_func_getpagesize, [ + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ +// Since Android NDK v16 getpagesize is defined as inline inside unistd.h +#ifdef __ANDROID__ +# include +#endif + ]], [[ + getpagesize(); +]])], + [ ac_cv_func_getpagesize="yes" ], + [ ac_cv_func_getpagesize="no" + ]) +]) +AM_CONDITIONAL([HAVE_ASPRINTF], [test "x$ac_cv_func_asprintf" = xyes]) +AM_CONDITIONAL([HAVE_FREEZERO], [test "x$ac_cv_func_freezero" = xyes]) +AM_CONDITIONAL([HAVE_GETPAGESIZE], [test "x$ac_cv_func_getpagesize" = xyes]) +AM_CONDITIONAL([HAVE_MEMMEM], [test "x$ac_cv_func_memmem" = xyes]) +AM_CONDITIONAL([HAVE_READPASSPHRASE], [test "x$ac_cv_func_readpassphrase" = xyes]) +AM_CONDITIONAL([HAVE_REALLOCARRAY], [test "x$ac_cv_func_reallocarray" = xyes]) +AM_CONDITIONAL([HAVE_RECALLOCARRAY], [test "x$ac_cv_func_recallocarray" = xyes]) +AM_CONDITIONAL([HAVE_STRLCAT], [test "x$ac_cv_func_strlcat" = xyes]) +AM_CONDITIONAL([HAVE_STRLCPY], [test "x$ac_cv_func_strlcpy" = xyes]) +AM_CONDITIONAL([HAVE_STRNDUP], [test "x$ac_cv_func_strndup" = xyes]) +AM_CONDITIONAL([HAVE_STRNLEN], [test "x$ac_cv_func_strnlen" = xyes]) +AM_CONDITIONAL([HAVE_STRSEP], [test "x$ac_cv_func_strsep" = xyes]) +AM_CONDITIONAL([HAVE_STRTONUM], [test "x$ac_cv_func_strtonum" = xyes]) +AM_CONDITIONAL([HAVE_TIMEGM], [test "x$ac_cv_func_timegm" = xyes]) +AM_CONDITIONAL([HAVE_GETPROGNAME], [test "x$ac_cv_func_getprogname" = xyes]) +AM_CONDITIONAL([HAVE_SYSLOG], [test "x$ac_cv_func_syslog" = xyes]) +AM_CONDITIONAL([HAVE_SYSLOG_R], [test "x$ac_cv_func_syslog_r" = xyes]) +]) + +AC_DEFUN([CHECK_SYSCALL_COMPAT], [ +AC_CHECK_FUNCS([accept4 pipe2 pledge poll socketpair]) +AM_CONDITIONAL([HAVE_ACCEPT4], [test "x$ac_cv_func_accept4" = xyes]) +AM_CONDITIONAL([HAVE_PIPE2], [test "x$ac_cv_func_pipe2" = xyes]) +AM_CONDITIONAL([HAVE_PLEDGE], [test "x$ac_cv_func_pledge" = xyes]) +AM_CONDITIONAL([HAVE_POLL], [test "x$ac_cv_func_poll" = xyes]) +AM_CONDITIONAL([HAVE_SOCKETPAIR], [test "x$ac_cv_func_socketpair" = xyes]) +]) + +AC_DEFUN([CHECK_B64_NTOP], [ +AC_SEARCH_LIBS([b64_ntop],[resolv]) +AC_SEARCH_LIBS([__b64_ntop],[resolv]) +AC_CACHE_CHECK([for b64_ntop], ac_cv_have_b64_ntop_arg, [ + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ +#include +#include +#include +#include +#include + ]], [[ b64_ntop(NULL, 0, NULL, 0); ]])], + [ ac_cv_have_b64_ntop_arg="yes" ], + [ ac_cv_have_b64_ntop_arg="no" + ]) +]) +AM_CONDITIONAL([HAVE_B64_NTOP], [test "x$ac_cv_func_b64_ntop_arg" = xyes]) +]) + +AC_DEFUN([CHECK_CRYPTO_COMPAT], [ +# Check crypto-related libc functions and syscalls +AC_CHECK_FUNCS([arc4random arc4random_buf arc4random_uniform]) +AC_CHECK_FUNCS([explicit_bzero getauxval]) + +AC_CACHE_CHECK([for getentropy], ac_cv_func_getentropy, [ + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ +#include +#include + +/* + * Explanation: + * + * - iOS <= 10.1 fails because of missing sys/random.h + * + * - in macOS 10.12 getentropy is not tagged as introduced in + * 10.12 so we cannot use it for target < 10.12 + */ +#ifdef __APPLE__ +# include +# include + +# if (TARGET_OS_IPHONE || TARGET_OS_SIMULATOR) +# include /* Not available as of iOS <= 10.1 */ +# else + +# include /* Pre 10.12 systems should die here */ + +/* Based on: https://gitweb.torproject.org/tor.git/commit/?id=16fcbd21 */ +# ifndef MAC_OS_X_VERSION_10_12 +# define MAC_OS_X_VERSION_10_12 101200 /* Robustness */ +# endif +# if defined(MAC_OS_X_VERSION_MIN_REQUIRED) +# if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12 +# error "Targeting on Mac OSX 10.11 or earlier" +# endif +# endif + +# endif +#endif /* __APPLE__ */ + ]], [[ + char buffer; + (void)getentropy(&buffer, sizeof (buffer)); +]])], + [ ac_cv_func_getentropy="yes" ], + [ ac_cv_func_getentropy="no" + ]) +]) + +AC_CHECK_FUNCS([timingsafe_bcmp timingsafe_memcmp]) +AM_CONDITIONAL([HAVE_ARC4RANDOM], [test "x$ac_cv_func_arc4random" = xyes]) +AM_CONDITIONAL([HAVE_ARC4RANDOM_BUF], [test "x$ac_cv_func_arc4random_buf" = xyes]) +AM_CONDITIONAL([HAVE_ARC4RANDOM_UNIFORM], [test "x$ac_cv_func_arc4random_uniform" = xyes]) +AM_CONDITIONAL([HAVE_EXPLICIT_BZERO], [test "x$ac_cv_func_explicit_bzero" = xyes]) +AM_CONDITIONAL([HAVE_GETENTROPY], [test "x$ac_cv_func_getentropy" = xyes]) +AM_CONDITIONAL([HAVE_TIMINGSAFE_BCMP], [test "x$ac_cv_func_timingsafe_bcmp" = xyes]) +AM_CONDITIONAL([HAVE_TIMINGSAFE_MEMCMP], [test "x$ac_cv_func_timingsafe_memcmp" = xyes]) + +# Override arc4random_buf implementations with known issues +AM_CONDITIONAL([HAVE_ARC4RANDOM_BUF], + [test "x$USE_BUILTIN_ARC4RANDOM" != xyes \ + -a "x$ac_cv_func_arc4random_buf" = xyes]) + +# Check for getentropy fallback dependencies +AC_CHECK_FUNCS([getauxval]) +AC_SEARCH_LIBS([dl_iterate_phdr],[dl]) +AC_CHECK_FUNCS([dl_iterate_phdr]) + +AC_SEARCH_LIBS([pthread_once],[pthread]) +AC_SEARCH_LIBS([pthread_mutex_lock],[pthread]) +AC_SEARCH_LIBS([clock_gettime],[rt posix4]) +AC_CHECK_FUNCS([clock_gettime]) +AM_CONDITIONAL([HAVE_CLOCK_GETTIME], [test "x$ac_cv_func_clock_gettime" = xyes]) +]) + +AC_DEFUN([CHECK_VA_COPY], [ +AC_CACHE_CHECK([whether va_copy exists], ac_cv_have_va_copy, [ + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ +#include +va_list x,y; + ]], [[ va_copy(x,y); ]])], + [ ac_cv_have_va_copy="yes" ], + [ ac_cv_have_va_copy="no" + ]) +]) +if test "x$ac_cv_have_va_copy" = "xyes" ; then + AC_DEFINE([HAVE_VA_COPY], [1], [Define if va_copy exists]) +fi + +AC_CACHE_CHECK([whether __va_copy exists], ac_cv_have___va_copy, [ + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ +#include +va_list x,y; + ]], [[ __va_copy(x,y); ]])], + [ ac_cv_have___va_copy="yes" ], [ ac_cv_have___va_copy="no" + ]) +]) +if test "x$ac_cv_have___va_copy" = "xyes" ; then + AC_DEFINE([HAVE___VA_COPY], [1], [Define if __va_copy exists]) +fi +]) -- cgit 1.4.1