--- /dev/null
+AC_DEFUN([ACX_OPENSSL_EDDSA],[
+ AC_MSG_CHECKING(for OpenSSL EDDSA support)
+
+ tmp_CPPFLAGS=$CPPFLAGS
+ tmp_LIBS=$LIBS
+
+ CPPFLAGS="$CPPFLAGS $CRYPTO_INCLUDES"
+ LIBS="$CRYPTO_LIBS $LIBS"
+
+ AC_LANG_PUSH([C])
+ AC_CACHE_VAL([acx_cv_lib_openssl_ed25519_support],[
+ acx_cv_lib_openssl_ed25519_support=no
+ AC_RUN_IFELSE([
+ AC_LANG_SOURCE([[
+ #include <openssl/evp.h>
+ #include <openssl/objects.h>
+ int main()
+ {
+ EVP_PKEY_CTX *ctx;
+
+ ctx = EVP_PKEY_CTX_new_id(NID_ED25519, NULL);
+ if (ctx == NULL)
+ return 1;
+ return 0;
+ }
+ ]])
+ ],[
+ AC_MSG_RESULT([Found ED25519])
+ acx_cv_lib_openssl_ed25519_support=yes
+ ],[
+ AC_MSG_RESULT([Cannot find ED25519])
+ AC_MSG_ERROR([OpenSSL library has no EDDSA support])
+ ],[
+ AC_MSG_WARN([Cannot test, ED25519])
+ acx_cv_lib_openssl_ed25519_support=yes
+ ])
+ ])
+ AC_CACHE_VAL([acx_cv_lib_openssl_ed448_support],[
+ acx_cv_lib_openssl_ed448_support=no
+ AC_RUN_IFELSE([
+ AC_LANG_SOURCE([[
+ #include <openssl/evp.h>
+ #include <openssl/objects.h>
+ int main()
+ {
+ EVP_PKEY_CTX *ctx;
+
+ ctx = EVP_PKEY_CTX_new_id(NID_ED448, NULL);
+ if (ctx == NULL)
+ return 1;
+ return 0;
+ }
+ ]])
+ ],[
+ AC_MSG_RESULT([Found ED448])
+ acx_cv_lib_openssl_ed448_support=yes
+ ],[
+ AC_MSG_RESULT([Cannot find ED448])
+ ],[
+ AC_MSG_WARN([Cannot test, ED448])
+ acx_cv_lib_openssl_ed448_support=yes
+ ])
+ ])
+ AC_LANG_POP([C])
+
+ CPPFLAGS=$tmp_CPPFLAGS
+ LIBS=$tmp_LIBS
+])