tests: Add a few simple tests

Add a few tests for the sign, verify, attach and detach code. These
require some additional infrastructure to create a sample PE/COFF
executable, plus a key & cert for testing.

Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>

tests/Makefile.am

@@ -0,0 +1,43 @@
+
+test_key = private-key.rsa
+test_cert = public-cert.pem
+test_image = test.pecoff
+
+check_PROGRAMS = test.pecoff
+check_DATA = $(test_key) $(test_cert)
+check_SCRIPTS = common.sh
+
+test_image_arch = x86-64
+test_lds = $(srcdir)/test.lds
+
+test_pecoff_SOURCES =
+
+test.pecoff: test.elf
+	$(OBJCOPY) -j .text -j .sdata -j .data \
+		-j .dynamic -j .dynsym  -j .rel \
+		-j .rela -j .reloc \
+		--target=efi-app-$(test_image_arch) $^ $@
+	$(STRIP) $@
+
+test.elf: LDFLAGS = -nostdlib -T $(test_lds) -m64
+test.elf: test.$(OBJEXT) $(test_lds)
+	$(LINK) $<
+
+.INTERMEDIATE: test.elf
+
+test.$(OBJEXT): ASFLAGS = -m64
+test.$(OBJEXT): $(srcdir)/test.S
+	$(AS) -o $@ $^
+
+$(test_key): Makefile
+	openssl genrsa -out $@ 2048
+
+$(test_cert): $(test_key) Makefile
+	openssl req -x509 -sha256 -subj '/' -new -key $< -out $@
+
+TESTS = sign-verify.sh \
+	sign-verify-detached.sh \
+	sign-attach-verify.sh
+
+EXTRA_DIST = $(test_lds) test.S $(TESTS) $(check_SCRIPTS)
+CLEANFILES = $(test_key) $(test_cert) $(test_image)