# Required packages (Debian 9/stretch):
#   libengine-pkcs11-openssl: /usr/lib/x86_64-linux-gnu/engines-1.1/pkcs11.so
#   softhsm2: /usr/bin/softhsm2-util
#   gnutls-bin: /usr/bin/p11tool
#   openssl: /usr/bin/openssl

SOFTHSM_PROVIDER ?= /usr/lib/softhsm/libsofthsm2.so
P11P_PROVIDER ?= /usr/lib/x86_64-linux-gnu/pkcs11/p11-kit-client.so

TEXT = "A foo is a bar"
SOFTHSM = /usr/bin/softhsm2-util
SOFTHSM_DIR = $(CURDIR)/softhsm
export SOFTHSM2_CONF = $(SOFTHSM_DIR)/softhsm2.conf

all: direct-softhsm p11p-softhsm

direct-softhsm: openssl.direct.cnf testsig.hsm
	echo "$(TEXT)" | ./do-verify.sh testsig.hsm $(SOFTHSM_PROVIDER) ./openssl.direct.cnf

p11p-softhsm: openssl.p11p.cnf testsig.hsm.p11p
	echo "$(TEXT)" | ./do-verify.sh testsig.hsm.p11p $(P11P_PROVIDER) ./openssl.p11p.cnf $(SOFTHSM_PROVIDER)

softhsm-token-setup: softhsm-token-setup.stamp
softhsm-token-setup.stamp: softhsm/tokens testkey.pkcs8
	test -x $(SOFTHSM)
	echo "directories.tokendir = $$(pwd)/softhsm/tokens/" > $(SOFTHSM2_CONF)
	${SOFTHSM} --init-token --free --label mytoken --so-pin ffffff --pin ffff
	${SOFTHSM} --import testkey.pkcs8 --token mytoken --label mykey --id 00 --pin ffff
	touch $@

softhsm/tokens:
	mkdir -p $@

testkey.pkcs8: testkey.pem
	openssl pkey -in $< -outform pem -out $@

testkey.pem:
	openssl genrsa -out $@ 2048

testsig.local: testkey.pem
	echo "$(TEXT)" | openssl dgst -sha256 -sign testkey.pem -out $@

testsig.hsm: softhsm-token-setup
	echo "$(TEXT)" | ./do-sign.sh $@ $(SOFTHSM_PROVIDER) ./openssl.direct.cnf

testsig.hsm.p11p: openssl.p11p.cnf softhsm-token-setup
	echo "$(TEXT)" | ./do-sign.sh $@ $(P11P_PROVIDER) ./openssl.p11p.cnf $(SOFTHSM_PROVIDER)

openssl.direct.cnf: openssl.template.cnf
	sed -e "s!@@P11P_PROVIDER@@!$(SOFTHSM_PROVIDER)!1" <$^ >$@

openssl.p11p.cnf: openssl.template.cnf
	sed -e "s!@@P11P_PROVIDER@@!$(P11P_PROVIDER)!1" <$^ >$@


openssl.template.cnf:
	printf "openssl_conf = openssl_init\n" >> $@
	printf "[openssl_init]\nengines=engine_section\n" >> $@
	printf "[engine_section]\npkcs11 = pkcs11_section\n" >> $@
	printf "[pkcs11_section]\ndynamic_path = /usr/lib/x86_64-linux-gnu/engines-1.1/pkcs11.so\n" >> $@
	printf "MODULE_PATH = @@P11P_PROVIDER@@\n" >> $@

clean:
	-rm -r softhsm
	-rm softhsm-token-setup.stamp
	-rm testkey.pem testkey.pkcs8
	-rm testsig.*
	-rm openssl.*.cnf

.PHONY: clean