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# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_lib_crypto.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_LIB_CRYPTO([yes|no|auto])
#
# DESCRIPTION
#
# Searches for the 'crypto' library with the --with... option.
#
# If found, define HAVE_CRYPTO and macro CRYPTO_LIBS. Also defines
# CRYPTO_WITH_<algo> for the algorithms found available. Possible
# algorithms: AES BF CAMELLIA CAST DES IDEA RC2 RC5 MD2 MD4 MD5 SHA RIPEMD
# RSA DSA DH
#
# The argument is used if no --with...-crypto 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 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_CRYPTO_LIB([algo-name],[function])
AC_DEFUN([AX_CHECK_CRYPTO_LIB],[
AC_CHECK_LIB([crypto], $2, [
AC_DEFINE([CRYPTO_WITH_$1],[1],[Algorithm $1 in openssl crypto library])
])
])
# AX_LIB_CRYPTO([yes|no|auto])
AC_DEFUN([AX_LIB_CRYPTO],[
AC_MSG_CHECKING([whether openssl crypto is enabled])
AC_ARG_WITH([crypto],[ --with-crypto requite crypto library
--without-crypto disable crypto library],[
AC_MSG_RESULT([$withval])
ac_with_crypto=$withval
],[
AC_MSG_RESULT([$1])
ac_with_crypto=$1
])
if test "$ac_with_crypto" = "yes" -o "$ac_with_crypto" = "auto" ; then
AC_CHECK_HEADERS([openssl/opensslconf.h],[
AC_CHECK_LIB([crypto], [CRYPTO_lock],[
AC_DEFINE([HAVE_CRYPTO],[1],[Openssl crypto library is available])
HAVE_CRYPTO=1
AC_SUBST([CRYPTO_LIBS],[-lcrypto])
# ciphers
AX_CHECK_CRYPTO_LIB([AES],[AES_ecb_encrypt])
AX_CHECK_CRYPTO_LIB([BF],[BF_ecb_encrypt])
AX_CHECK_CRYPTO_LIB([CAST],[CAST_ecb_encrypt])
AX_CHECK_CRYPTO_LIB([CAMELLIA],[Camellia_ecb_encrypt])
AX_CHECK_CRYPTO_LIB([DES],[DES_ecb_encrypt])
AX_CHECK_CRYPTO_LIB([IDEA],[idea_ecb_encrypt])
AX_CHECK_CRYPTO_LIB([RC2],[RC2_ecb_encrypt])
AX_CHECK_CRYPTO_LIB([RC5],[RC5_32_ecb_encrypt])
# digests
AX_CHECK_CRYPTO_LIB([MD2],[MD2])
AX_CHECK_CRYPTO_LIB([MD4],[MD4])
AX_CHECK_CRYPTO_LIB([MD5],[MD5])
AX_CHECK_CRYPTO_LIB([RIPEMD],[RIPEMD160])
AX_CHECK_CRYPTO_LIB([SHA],[SHA1])
# others
AX_CHECK_CRYPTO_LIB([RSA],[RSA_set_method])
AX_CHECK_CRYPTO_LIB([DSA],[DSA_set_method])
AX_CHECK_CRYPTO_LIB([DH],[DH_set_method])
])
])
# complain only if crypto as *explicitly* required
if test "$ac_with_crypto" = "yes" -a "x$HAVE_CRYPTO" = "x" ; then
AC_MSG_ERROR([cannot configure required openssl crypto library])
fi
fi
])
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