pkg/libcose: Add package for COSE

pkg/libcose/Makefile

+PKG_NAME=libcose
+PKG_URL=https://github.com/bergzand/libcose
+PKG_VERSION=v0.3.1
+PKG_LICENSE=LGPL
+
+.PHONY: all
+
+all: git-download
+	"$(MAKE)" -C $(PKG_BUILDDIR)/src -f $(CURDIR)/Makefile.libcose
+	"$(MAKE)" -C $(PKG_BUILDDIR)/src/crypt -f $(CURDIR)/Makefile.libcose_crypt
+
+include $(RIOTBASE)/pkg/pkg.mk

pkg/libcose/Makefile.dep

+USEPKG += cn-cbor
+
+USEMODULE += libcose_crypt
+
+ifneq (,$(filter libcose_crypt_tweetnacl,$(USEMODULE)))
+  USEPKG += tweetnacl
+endif
+ifneq (,$(filter libcose_crypt_hacl,$(USEMODULE)))
+  USEPKG += hacl
+endif

pkg/libcose/Makefile.include

+INCLUDES += -I$(PKGDIRBASE)/libcose/include
+CFLAGS += -DUSE_CBOR_CONTEXT
+
+ifneq (,$(filter libcose_crypt_tweetnacl,$(USEMODULE)))
+  CFLAGS += -DCRYPTO_TWEETNACL
+endif
+ifneq (,$(filter libcose_crypt_hacl,$(USEMODULE)))
+  CFLAGS += -DCRYPTO_HACL
+endif
+
+# Declare pseudomodules here to be selfcontained
+PSEUDOMODULES += libcose_crypt_%

pkg/libcose/Makefile.libcose

+MODULE := libcose
+
+include $(RIOTBASE)/Makefile.base

pkg/libcose/Makefile.libcose_crypt

+MODULE := libcose_crypt
+SUBMODULES = 1
+
+include $(RIOTBASE)/Makefile.base