58 lines
2 KiB
Plaintext
58 lines
2 KiB
Plaintext
# af_alg.m4 serial 6
|
|
dnl Copyright 2018-2023 Free Software Foundation, Inc.
|
|
dnl This file is free software; the Free Software Foundation
|
|
dnl gives unlimited permission to copy and/or distribute it,
|
|
dnl with or without modifications, as long as this notice is preserved.
|
|
|
|
dnl From Matteo Croce.
|
|
|
|
AC_DEFUN_ONCE([gl_AF_ALG],
|
|
[
|
|
AC_REQUIRE([gl_SYS_SOCKET_H])
|
|
AC_REQUIRE([AC_C_INLINE])
|
|
|
|
dnl Check whether linux/if_alg.h has needed features.
|
|
AC_CACHE_CHECK([whether linux/if_alg.h has struct sockaddr_alg.],
|
|
[gl_cv_header_linux_if_alg_salg],
|
|
[AC_COMPILE_IFELSE(
|
|
[AC_LANG_PROGRAM([[#include <sys/socket.h>
|
|
#include <linux/if_alg.h>
|
|
struct sockaddr_alg salg = {
|
|
.salg_family = AF_ALG,
|
|
.salg_type = "hash",
|
|
.salg_name = "sha1",
|
|
};]])],
|
|
[gl_cv_header_linux_if_alg_salg=yes],
|
|
[gl_cv_header_linux_if_alg_salg=no])])
|
|
if test "$gl_cv_header_linux_if_alg_salg" = yes; then
|
|
AC_DEFINE([HAVE_LINUX_IF_ALG_H], [1],
|
|
[Define to 1 if you have 'struct sockaddr_alg' defined.])
|
|
fi
|
|
|
|
dnl The default is to not use AF_ALG if available,
|
|
dnl as it's system dependent as to whether the kernel
|
|
dnl routines are faster than libcrypto for example.
|
|
use_af_alg=no
|
|
AC_ARG_WITH([linux-crypto],
|
|
[AS_HELP_STRING([[--with-linux-crypto]],
|
|
[use Linux kernel cryptographic API (if available) for the hash functions
|
|
MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512 on files])],
|
|
[use_af_alg=$withval],
|
|
[use_af_alg=no])
|
|
dnl We cannot use it if it is not available.
|
|
if test "$gl_cv_header_linux_if_alg_salg" != yes; then
|
|
if test "$use_af_alg" != no; then
|
|
AC_MSG_WARN([Linux kernel cryptographic API not found])
|
|
fi
|
|
use_af_alg=no
|
|
fi
|
|
|
|
if test "$use_af_alg" != no; then
|
|
USE_AF_ALG=1
|
|
else
|
|
USE_AF_ALG=0
|
|
fi
|
|
AC_DEFINE_UNQUOTED([USE_LINUX_CRYPTO_API], [$USE_AF_ALG],
|
|
[Define to 1 if you want to use the Linux kernel cryptographic API.])
|
|
])
|