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openssl.m4
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openssl.m4
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dnl Check to find the LibreSSL/OpenSSL headers/libraries
AC_DEFUN([tinc_OPENSSL],
[
case $host_os in
*mingw*)
;;
*)
AC_CHECK_FUNC(dlopen,
[],
[AC_CHECK_LIB(dl, dlopen,
[LIBS="$LIBS -ldl"],
[AC_MSG_ERROR([LibreSSL/OpenSSL depends on libdl.]); break]
)]
)
;;
esac
AC_ARG_WITH(openssl,
AS_HELP_STRING([--with-openssl=DIR], [LibreSSL/OpenSSL base directory, or:]),
[openssl="$withval"
CPPFLAGS="$CPPFLAGS -I$withval/include"
LDFLAGS="$LDFLAGS -L$withval/lib"]
)
AC_ARG_WITH(openssl-include,
AS_HELP_STRING([--with-openssl-include=DIR], [LibreSSL/OpenSSL headers directory (without trailing /openssl)]),
[openssl_include="$withval"
CPPFLAGS="$CPPFLAGS -I$withval"]
)
AC_ARG_WITH(openssl-lib,
AS_HELP_STRING([--with-openssl-lib=DIR], [LibreSSL/OpenSSL library directory]),
[openssl_lib="$withval"
LDFLAGS="$LDFLAGS -L$withval"]
)
AC_CHECK_HEADERS(openssl/evp.h openssl/rsa.h openssl/rand.h openssl/err.h openssl/sha.h openssl/pem.h openssl/engine.h,
[],
[AC_MSG_ERROR([LibreSSL/OpenSSL header files not found.]); break]
)
AC_CHECK_LIB(crypto, EVP_EncryptInit_ex,
[LIBS="-lcrypto $LIBS"],
[AC_MSG_ERROR([LibreSSL/OpenSSL libraries not found.])]
)
AC_CHECK_FUNCS([RAND_bytes EVP_EncryptInit_ex EVP_CIPHER_CTX_new], ,
[AC_MSG_ERROR([Missing LibreSSL/OpenSSL functionality, make sure you have installed the latest version.]); break],
)
AC_CHECK_DECLS([OpenSSL_add_all_algorithms, EVP_aes_256_cfb], ,
[AC_MSG_ERROR([Missing LibreSSL/OpenSSL functionality, make sure you have installed the latest version.]); break],
[#include <openssl/evp.h>]
)
AC_CHECK_FUNCS([BN_GENCB_new RSA_set0_key], , , [#include <openssl/rsa.h>])
])