Index: security/libdecaf/Makefile
===================================================================
--- /dev/null
+++ security/libdecaf/Makefile
@@ -0,0 +1,29 @@
+# $FreeBSD$
+
+PORTNAME=	libdecaf
+PORTVERSION=	0.9.4
+CATEGORIES=	security
+MASTER_SITES=	SF/ed448goldilocks/
+
+MAINTAINER=	krion@FreeBSD.org
+COMMENT=	Implementation of elliptic curve cryptography
+
+LICENSE=	MIT
+LICENSE_FILE=	${WRKSRC}/LICENSE.txt
+
+USES=		gmake python:2.7 tar:tgz
+USE_LDCONFIG=	yes
+LDFLAGS+=	-L${LOCALBASE}/lib
+
+PLIST_FILES=	bin/ristretto bin/shakesum \
+		lib/libdecaf.so lib/libdecaf.so.1
+
+post-patch:
+	@${REINPLACE_CMD} -e 's|PYTHON ?= python|PYTHON ?= ${PYTHON_CMD}|g' \
+		${WRKSRC}/Makefile
+
+do-install:
+	${INSTALL_PROGRAM} ${WRKSRC}/build/bin/* ${STAGEDIR}${PREFIX}/bin/
+	${INSTALL_LIB} ${WRKSRC}/build/lib/* ${STAGEDIR}${PREFIX}/lib/
+
+.include <bsd.port.mk>
Index: security/libdecaf/distinfo
===================================================================
--- /dev/null
+++ security/libdecaf/distinfo
@@ -0,0 +1,3 @@
+TIMESTAMP = 1515406054
+SHA256 (libdecaf-0.9.4.tgz) = 6b0b6dc77a8dec88ea5b45902f8211d9f6c55b3346191dcd0aaeeb45a8d23f7f
+SIZE (libdecaf-0.9.4.tgz) = 557122
Index: security/libdecaf/files/patch-Makefile
===================================================================
--- /dev/null
+++ security/libdecaf/files/patch-Makefile
@@ -0,0 +1,45 @@
+--- Makefile.orig	2018-01-08 13:58:29 UTC
++++ Makefile
+@@ -19,7 +19,7 @@ BUILD_IBIN = build/obj/bin
+ 
+ DOXYGEN ?= doxygen
+ 
+-ifeq ($(UNAME),Darwin)
++ifeq ($(UNAME),FreeBSD)
+ CC = clang
+ CXX = clang++
+ else
+@@ -97,14 +97,14 @@ scan: clean
+ 
+ # Internal test programs, which are not part of the final build/bin directory.
+ $(BUILD_IBIN)/test: $(BUILD_OBJ)/test_decaf.o lib
+-ifeq ($(UNAME),Darwin)
++ifeq ($(UNAME),FreeBSD)
+ 	$(LDXX) $(LDFLAGS) -o $@ $< -L$(BUILD_LIB) -ldecaf
+ else
+ 	$(LDXX) $(LDFLAGS) -Wl,-rpath,`pwd`/$(BUILD_LIB) -o $@ $< -L$(BUILD_LIB) -ldecaf
+ endif
+ 
+ $(BUILD_BIN)/ristretto: $(BUILD_OBJ)/ristretto.o lib
+-ifeq ($(UNAME),Darwin)
++ifeq ($(UNAME),FreeBSD)
+ 	$(LDXX) $(LDFLAGS) -o $@ $< -L$(BUILD_LIB) -ldecaf
+ else
+ 	$(LDXX) $(LDFLAGS) -Wl,-rpath,`pwd`/$(BUILD_LIB) -o $@ $< -L$(BUILD_LIB) -ldecaf
+@@ -112,14 +112,14 @@ endif
+ 
+ # Internal test programs, which are not part of the final build/bin directory.
+ $(BUILD_IBIN)/test_ct: $(BUILD_OBJ)/test_ct.o lib
+-ifeq ($(UNAME),Darwin)
++ifeq ($(UNAME),FreeBSD)
+ 	$(LDXX) $(LDFLAGS) -o $@ $< -L$(BUILD_LIB) -ldecaf
+ else
+ 	$(LDXX) $(LDFLAGS) -Wl,-rpath,`pwd`/$(BUILD_LIB) -o $@ $< -L$(BUILD_LIB) -ldecaf
+ endif
+ 
+ $(BUILD_IBIN)/bench: $(BUILD_OBJ)/bench_decaf.o lib
+-ifeq ($(UNAME),Darwin)
++ifeq ($(UNAME),FreeBSD)
+ 	$(LDXX) $(LDFLAGS) -o $@ $< -L$(BUILD_LIB) -ldecaf
+ else
+ 	$(LDXX) $(LDFLAGS) -Wl,-rpath,`pwd`/$(BUILD_LIB) -o $@ $< -L$(BUILD_LIB) -ldecaf
Index: security/libdecaf/pkg-descr
===================================================================
--- /dev/null
+++ security/libdecaf/pkg-descr
@@ -0,0 +1,5 @@
+Implementation of elliptic curve cryptography using the Montgomery
+and Edwards curves Curve25519, Ed25519, Ed448-Goldilocks and
+Curve448, using the Decaf / Ristretto encoding.
+
+WWW: http://ed448goldilocks.sourceforge.net/