# (GNU) Makefile for Cryptech PKCS #11 implementation.
#
# Author: Rob Austein
# Copyright (c) 2015-2016, NORDUnet A/S
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
# - Redistributions of source code must retain the above copyright notice,
#   this list of conditions and the following disclaimer.
#
# - Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
#   documentation and/or other materials provided with the distribution.
#
# - Neither the name of the NORDUnet nor the names of its contributors may
#   be used to endorse or promote products derived from this software
#   without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
# TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# Locations of libraries on which this code depends.

ifndef CRYPTECH_ROOT
  CRYPTECH_ROOT := $(abspath ../..)
endif

PKCS11_DIR   ?= ${CRYPTECH_ROOT}/sw/pkcs11
LIBHAL_DIR   ?= ${PKCS11_DIR}/libhal
LIBTFM_DIR   ?= ${PKCS11_DIR}/libtfm
SQLITE3_DIR  ?= ${PKCS11_DIR}/sqlite3

# Whether to enable threading.  Main reason for being able to turn it
# off is that gdb on the Novena (sometimes) goes bananas when
# threading is enabled.

ENABLE_THREADS ?= yes

# Whether to enable debugging code that prints diagnostic information
# to stderr on various conditions (mostly failures).

ENABLE_DEBUGGING ?= no

# Whether to disable #warning statements; generally these are present for
# a reason, but they can get distracting when one is attempting to debug
# something else.

ENABLE_FOOTNOTE_WARNINGS ?= yes

# Whether to build and use our own copy of the sqlite3 library.

ENABLE_OWN_SQLITE_LIBRARY ?= $(if $(wildcard ${CRYPTECH_ROOT}/sw/thirdparty/sqlite3),yes,no)

# Target platform for shared library.  Every platform has its own
# kinks, as does GNU libtool, so we just suck it up and do the
# necessary kinks for the platforms we support.  Yuck.

UNAME := $(shell uname)

# Compilation flags, etc.

CFLAGS	:= -g3 -fPIC -Wall -std=c99 -I${CRYPTECH_ROOT}/sw/libhal
LIBS	:= ${LIBHAL_DIR}/libhal.a ${LIBTFM_DIR}/libtfm.a

ifeq "${UNAME}" "Darwin"
  SONAME  := libpkcs11.dylib
  SOFLAGS := -dynamiclib
else
  SONAME  := libpkcs11.so
  SOFLAGS := -Wl,-Bsymbolic-functions -Wl,-Bsymbolic -Wl,-z,noexecstack -Wl,-soname,${SONAME}.0
endif

ifeq "${ENABLE_FOOTNOTE_WARNINGS}" "no"
  CFLAGS += -Wno-\#warnings -Wno-cpp
endif

ifneq "${ENABLE_THREADS}" "yes"
  CFLAGS += -DUSE_PTHREADS=0
else ifneq "${UNAME}" "Darwin"
  CFLAGS += -pthread
endif

ifeq "${ENABLE_DEBUGGING}" "yes"
  CFLAGS += -DDEBUG_HAL=1 -DDEBUG_PKCS11=1
endif

ifeq "${ENABLE_OWN_SQLITE_LIBRARY}" "yes"
  CFLAGS  += -I${SQLITE3_DIR}
  SOFLAGS += ${SQLITE3_DIR}/libsqlite3.a
else
  SOFLAGS += -lsqlite3
endif

ifndef OBJCOPY
  OBJCOPY := objcopy
endif

all: ${SONAME} p11util py11/attribute_map.py

clean:
	rm -rf *.o ${SONAME}* p11util schema.h attributes.h
	cd libtfm; ${MAKE} $@
	cd libhal; ${MAKE} $@
ifeq "${ENABLE_OWN_SQLITE_LIBRARY}" "yes"
	cd sqlite3; ${MAKE} $@
endif

distclean: clean
	rm -f TAGS

.FORCE:

${LIBTFM_DIR}/libtfm.a: .FORCE
	cd libtfm; ${MAKE}

${LIBHAL_DIR}/libhal.a: .FORCE ${LIBTFM_DIR}/libtfm.a
	cd libhal; ${MAKE} daemon

${SQLITE3_DIR}/libsqlite3.a: .FORCE
	cd sqlite3; ${MAKE}

schema.h: schema.sql scripts/convert-schema.sed GNUmakefile
	sed -f scripts/convert-schema.sed <schema.sql >schema.h

attributes.h: attributes.yaml scripts/build-attributes GNUmakefile
	python scripts/build-attributes attributes.yaml attributes.h

py11/attribute_map.py: attributes.yaml scripts/build-py11-attributes GNUmakefile
	python scripts/build-py11-attributes attributes.yaml py11/attribute_map.py

pkcs11.o: pkcs11.c schema.h attributes.h ${LIBS}
	${CC} ${CFLAGS} -c $<

ifeq "${ENABLE_OWN_SQLITE_LIBRARY}" "yes"
  pkcs11.o: ${SQLITE3_DIR}/libsqlite3.a
endif

ifeq "${UNAME}" "Darwin"

  ${SONAME}: pkcs11.o ${LIBS}
	nm $< | awk 'NF == 3 && $$2 == "T" && $$3 ~ /^_C_/ {print $$3}' >$@.tmp
	${CC} -Wl,-exported_symbols_list,$@.tmp -o $@ $^ ${SOFLAGS} ${LDFLAGS}
	rm -f $@.tmp

else

  ${SONAME}: pkcs11.o ${LIBS}
	${CC} ${CFLAGS} -shared -o $@.tmp $^ ${SOFLAGS} ${LDFLAGS}
	${OBJCOPY} -w -G 'C_*' $@.tmp $@
	rm -f $@.tmp

endif

p11util.o: p11util.c schema.h
	${CC} ${CFLAGS} -c $<

p11util: p11util.o ${LIBS}
	${CC} ${CFLAGS} -o $@ $^ ${LDFLAGS}

tags: TAGS

TAGS: *.[ch]
	etags $^

# Basic testing, via the Python unittest library and our py11 interface code

test: all
	sudo python unit_tests.py

# Further testing using hsmbully, if we can find a copy of it.

HSMBULLY := $(firstword $(wildcard $(addsuffix /hsmbully,$(subst :, ,.:${PATH}))))

ifneq "${HSMBULLY}" ""

  HSMBULLY_OPTIONS := \
	--pin fnord --so-pin fnord --pkcs11lib $(abspath ${SONAME}) \
	--verbose=9 --fast-and-frivolous --skip-fragmentation --skip-keysizing

  HSMBULLY_DATABASE=$(abspath hsmbully.pkcs11.db)
  HSMBULLY_KS_CLIENT=$(abspath hsmbully.client-keystore)
  HSMBULLY_KS_SERVER=$(abspath hsmbully.server-keystore)

  HSMBULLY_SERVER_BIN=$(wildcard $(abspath ../libhal/tests/test-rpc_server))

  bully: all
	set -x; \
	sudo rm -f ${HSMBULLY_DATABASE} ${HSMBULLY_DATABASE}-journal ${HSMBULLY_KS_CLIENT} ${HSMBULLY_KS_SERVER}; \
	if test -x '${HSMBULLY_SERVER_BIN}'; \
	then \
		sudo CRYPTECH_KEYSTORE=${HSMBULLY_KS_SERVER} ${HSMBULLY_SERVER_BIN} & \
		pid=$$!; \
		sleep 5; \
		(echo YouReallyNeedToChangeThisPINRightNowWeAreNotKidding; echo fnord; echo fnord) | \
		CRYPTECH_KEYSTORE=${HSMBULLY_KS_CLIENT} ./p11util --set-so-pin --set-user-pin --pin-from-stdin; \
		PKCS11_DATABASE=${HSMBULLY_DATABASE} CRYPTECH_KEYSTORE=${HSMBULLY_KS_CLIENT} ${HSMBULLY} ${HSMBULLY_OPTIONS}; \
		sudo kill $$pid; \
	else \
		(echo YouReallyNeedToChangeThisPINRightNowWeAreNotKidding; echo fnord; echo fnord) | \
		sudo CRYPTECH_KEYSTORE=${HSMBULLY_KS_CLIENT} ./p11util --set-so-pin --set-user-pin --pin-from-stdin; \
		sudo PKCS11_DATABASE=${HSMBULLY_DATABASE} CRYPTECH_KEYSTORE=${HSMBULLY_KS_CLIENT} ${HSMBULLY} ${HSMBULLY_OPTIONS}; \
	fi; \
	sudo rm -f ${HSMBULLY_DATABASE} ${HSMBULLY_DATABASE}-journal ${HSMBULLY_KS_CLIENT} ${HSMBULLY_KS_SERVER}

endif