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- # ===========================================================================
- # https://www.gnu.org/software/autoconf-archive/ax_lib_nettle.html
- # ===========================================================================
- #
- # SYNOPSIS
- #
- # AX_LIB_NETTLE([yes|no|auto])
- #
- # DESCRIPTION
- #
- # Searches for the 'nettle' library with the --with... option.
- #
- # If found, define HAVE_NETTLE and macro NETTLE_LIBS. Also defines
- # NETTLE_WITH_<algo> for the algorithms found available. Possible
- # algorithms: AES ARCTWO BLOWFISH CAST128 DES DES3 SERPENT TWOFISH MD2 MD4
- # MD5 SHA1 SHA256.
- #
- # The argument is used if no --with...-nettle option is set. Value "yes"
- # requires the configuration by default. Value "no" does not require it by
- # default. Value "auto" configures the library only if available.
- #
- # See also AX_LIB_BEECRYPT, AX_LIB_CRYPTO, and AX_LIB_GCRYPT.
- #
- # LICENSE
- #
- # Copyright (c) 2009 Fabien Coelho <autoconf.archive@coelho.net>
- #
- # Copying and distribution of this file, with or without modification, are
- # permitted in any medium without royalty provided the copyright notice
- # and this notice are preserved. This file is offered as-is, without any
- # warranty.
-
- #serial 10
-
- # AX_CHECK_NETTLE_ALGO([name],[function])
- AC_DEFUN([AX_CHECK_NETTLE_ALGO],[
- AC_CHECK_LIB([nettle], [nettle_$2],
- AC_DEFINE([NETTLE_WITH_$1],[1],[Algorithm $1 in nettle library]))
- ])
-
- # AX_LIB_NETTLE([yes|no|auto])
- AC_DEFUN([AX_LIB_NETTLE],[
- AC_MSG_CHECKING([whether nettle is enabled])
- AC_ARG_WITH([nettle],[ --with-nettle require nettle library
- --without-nettle disable nettle library],[
- AC_MSG_RESULT([$withval])
- ax_with_nettle=$withval
- ],[
- AC_MSG_RESULT([$1])
- ax_with_nettle=$1
- ])
- if test "$ax_with_nettle" = "yes" -o "$ax_with_nettle" = "auto" ; then
- AC_CHECK_HEADERS([nettle/nettle-meta.h],[
- AC_CHECK_LIB([nettle],[nettle_base64_encode_final],[
- AC_DEFINE([HAVE_NETTLE],[1],[Nettle library is available])
- HAVE_NETTLE=1
- AC_SUBST([NETTLE_LIBS],[-lnettle])
- # ciphers
- AX_CHECK_NETTLE_ALGO([AES],[aes_encrypt])
- AX_CHECK_NETTLE_ALGO([ARCTWO],[arctwo_encrypt])
- AX_CHECK_NETTLE_ALGO([BLOWFISH],[blowfish_encrypt])
- AX_CHECK_NETTLE_ALGO([CAST128],[cast128_encrypt])
- AX_CHECK_NETTLE_ALGO([DES],[des_encrypt])
- AX_CHECK_NETTLE_ALGO([DES3],[des3_encrypt])
- AX_CHECK_NETTLE_ALGO([SERPENT],[serpent_encrypt])
- AX_CHECK_NETTLE_ALGO([TWOFISH],[twofish_encrypt])
- # digests
- AX_CHECK_NETTLE_ALGO([MD2],[md2_digest])
- AX_CHECK_NETTLE_ALGO([MD4],[md4_digest])
- AX_CHECK_NETTLE_ALGO([MD5],[md5_digest])
- AX_CHECK_NETTLE_ALGO([SHA1],[sha1_digest])
- AX_CHECK_NETTLE_ALGO([SHA256],[sha256_digest])
- ])
- ])
- # complain only if explicitly required
- if test "$ax_with_nettle" = "yes" -a "x$HAVE_NETTLE" = "x" ; then
- AC_MSG_ERROR([cannot configure required nettle library])
- fi
- fi
- ])
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