#
# Copyright (C) 2011-2017 Intel Corporation. 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 Intel Corporation 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
# OWNER 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.
#
#

######## SGX SDK Settings ########

SGX_SDK := /home/m2mazmud/sgx2.1/sgxsdk
SGX_MODE := HW
SGX_ARCH := x64
SGX_DEBUG := 1

ifeq ($(shell getconf LONG_BIT), 32)
	SGX_ARCH := x86
else ifeq ($(findstring -m32, $(CXXFLAGS)), -m32)
	SGX_ARCH := x86
endif

ifeq ($(SGX_ARCH), x86)
	SGX_COMMON_CFLAGS := -m32
	SGX_LIBRARY_PATH := $(SGX_SDK)/lib
	SGX_ENCLAVE_SIGNER := $(SGX_SDK)/bin/x86/sgx_sign
	SGX_EDGER8R := $(SGX_SDK)/bin/x86/sgx_edger8r
else
	SGX_COMMON_CFLAGS := -m64
	SGX_LIBRARY_PATH := $(SGX_SDK)/lib64
	SGX_ENCLAVE_SIGNER := $(SGX_SDK)/bin/x64/sgx_sign
	SGX_EDGER8R := $(SGX_SDK)/bin/x64/sgx_edger8r
endif

ifeq ($(SGX_DEBUG), 1)
ifeq ($(SGX_PRERELEASE), 1)
$(error Cannot set SGX_DEBUG and SGX_PRERELEASE at the same time!!)
endif
endif

ifeq ($(SGX_DEBUG), 1)
	SGX_COMMON_CFLAGS += -O0 -g
else
	SGX_COMMON_CFLAGS += -O2
endif

######## Library Settings ########

OPENSSL_LIBRARY_PATH := /home/m2mazmud/old_stuff/intel-sgx-ssl/Linux/package/lib64/
OPENSSL_BAREBONES_LIBRARY_PATH := /home/m2mazmud/old_stuff/intel-sgx-ssl/openssl_source/openssl-1.1.0h/
OpenSSL_Crypto_Library_Name := sgx_tsgxssl_crypto
SGXSSL_Library_Name := sgx_tsgxssl
SgxSSL_Link_Libraries := -L$(OPENSSL_LIBRARY_PATH) -Wl,--whole-archive -l$(SGXSSL_Library_Name) -Wl,--no-whole-archive -l$(OpenSSL_Crypto_Library_Name)
#Security_Link_Flags := -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now -pie
OPENSSL_INCLUDES := /home/m2mazmud/old_stuff/intel-sgx-ssl/Linux/package/include



Trust_Lib_Name := libLocalAttestation_Trusted.a
TrustLib_Cpp_Files := LocalAttestationCode/LocalAttestationTrustedWrapper.cpp LocalAttestationCode/LocalAttestationTrusted.cpp LocalAttestationCode/LocalAttestationCode_t.c
TrustLib_Cpp_Objects := $(TrustLib_Cpp_Files:.cpp=.o)
TrustLib_Include_Paths := -I$(SGX_SDK)/include -I$(SGX_SDK)/include/tlibc -I$(SGX_SDK)/include/libcxx -I$(SGX_SDK)/include/epid -I./Include -I./Decryptor
TrustLib_Compile_Flags := $(SGX_COMMON_CFLAGS) -nostdinc -fvisibility=hidden -fpie -fstack-protector  $(TrustLib_Include_Paths) -Wall
TrustLib_Compile_Cxx_Flags :=  -std=c++11 -nostdinc++

######## App Settings ########

ifneq ($(SGX_MODE), HW)
	Urts_Library_Name := sgx_urts_sim
else
	Urts_Library_Name := sgx_urts
endif

App_Cpp_Files := $(wildcard App/*.cpp)
App_Include_Paths := -I$(SGX_SDK)/include -I$(SGX_SDK)/include/ippcp -I./Include -I./LocalAttestationCode

App_Compile_Flags := $(SGX_COMMON_CFLAGS) -fPIC -Wno-attributes $(App_Include_Paths) -Wall
# Three configuration modes - Debug, prerelease, release
#   Debug - Macro DEBUG enabled.
#   Prerelease - Macro NDEBUG and EDEBUG enabled.
#   Release - Macro NDEBUG enabled.
ifeq ($(SGX_DEBUG), 1)
	App_Compile_Flags += -DDEBUG -UNDEBUG -UEDEBUG
else ifeq ($(SGX_PRERELEASE), 1)
	App_Compile_Flags += -DNDEBUG -DEDEBUG -UDEBUG
else
	App_Compile_Flags += -DNDEBUG -UEDEBUG -UDEBUG
endif

#App_Link_Flags := $(SGX_COMMON_CFLAGS) -L$(SGX_LIBRARY_PATH) -l$(Urts_Library_Name) -L. -lpthread -lprotobuf
App_Link_Flags := $(SGX_COMMON_CFLAGS) $(Security_Link_Flags) -L$(SGX_LIBRARY_PATH) -l$(Urts_Library_Name) -lsgx_uae_service -L$(OPENSSL_LIBRARY_PATH) -lsgx_usgxssl -lpthread  -lprotobuf #-L$(OPENSSL_BAREBONES_LIBRARY_PATH) -lcrypto

ifneq ($(SGX_MODE), HW)
	App_Link_Flags += -lsgx_uae_service_sim
else
	App_Link_Flags += -lsgx_uae_service
endif

App_Cpp_Objects := App/App.o App/LocalAttestationUntrusted.o App/protobufLAInitiator.o App/protobufSgxLATransformsInitiator.o App/ProtobufLAMessages.pb.o #$(App_Cpp_Files:.cpp=.o)
App_Name := app

######## Enclave Settings ########

Decryptor_Version_Script := Decryptor/Decryptor.lds

ifneq ($(SGX_MODE), HW)
	Trts_Library_Name := sgx_trts_sim
	Service_Library_Name := sgx_tservice_sim
else
	Trts_Library_Name := sgx_trts
	Service_Library_Name := sgx_tservice
endif
Crypto_Library_Name := sgx_tcrypto

Enclave_Cpp_Files_2 := $(wildcard Decryptor/*.cpp)
Enclave_Include_Paths := -I$(SGX_SDK)/include -I$(SGX_SDK)/include/tlibc -I$(SGX_SDK)/include/libcxx -I./LocalAttestationCode -I./Include

CC_BELOW_4_9 := $(shell expr "`$(CC) -dumpversion`" \< "4.9")
ifeq ($(CC_BELOW_4_9), 1)
	Enclave_Compile_Flags := $(SGX_COMMON_CFLAGS) -nostdinc -fvisibility=hidden -fpie -ffunction-sections -fdata-sections -fstack-protector -Wno-unused-variable -Wall
else
	Enclave_Compile_Flags := $(SGX_COMMON_CFLAGS) -nostdinc -fvisibility=hidden -fpie -ffunction-sections -fdata-sections -fstack-protector-strong -Wno-unused-variable -Wall
endif

Enclave_Compile_Flags += $(Enclave_Include_Paths)

# To generate a proper enclave, it is recommended to follow below guideline to link the trusted libraries:
#    1. Link sgx_trts with the `--whole-archive' and `--no-whole-archive' options,
#       so that the whole content of trts is included in the enclave.
#    2. For other libraries, you just need to pull the required symbols.
#       Use `--start-group' and `--end-group' to link these libraries.
# Do NOT move the libraries linked with `--start-group' and `--end-group' within `--whole-archive' and `--no-whole-archive' options.
# Otherwise, you may get some undesirable errors.
Common_Enclave_Link_Flags := $(SGX_COMMON_CFLAGS) -Wl,--no-undefined -nostdlib -nodefaultlibs -nostartfiles \
        -Wl,--whole-archive -L$(OPENSSL_LIBRARY_PATH) -lsgx_tsgxssl -Wl,--no-whole-archive -lsgx_tsgxssl_crypto \
	-Wl,--whole-archive -l$(Trts_Library_Name) -Wl,--no-whole-archive \
	-Wl,--start-group -L$(SGX_LIBRARY_PATH) -L. -L./Decryptor -L./LocalAttestationCode -lsgx_tstdc -lsgx_tcxx -l$(Crypto_Library_Name) -l$(Service_Library_Name) -Wl,--end-group \
	-Wl,-Bstatic -Wl,-Bsymbolic  \
	-Wl,-pie,-eenclave_entry -Wl,--export-dynamic \
	-Wl,--defsym,__ImageBase=0 -Wl,--gc-sections
Decryptor_Link_Flags := $(Common_Enclave_Link_Flags) -Wl,--version-script=$(Decryptor_Version_Script)
Enclave_Cpp_Objects_2 := $(Enclave_Cpp_Files_2:.cpp=.o)
Enclave_Name_2 := libDecryptor.so


ifeq ($(SGX_MODE), HW)
ifeq ($(SGX_DEBUG), 1)
	Build_Mode = HW_DEBUG
else ifeq ($(SGX_PRERELEASE), 1)
	Build_Mode = HW_PRERELEASE
else
	Build_Mode = HW_RELEASE
endif
else
ifeq ($(SGX_DEBUG), 1)
	Build_Mode = SIM_DEBUG
else ifeq ($(SGX_PRERELEASE), 1)
	Build_Mode = SIM_PRERELEASE
else
	Build_Mode = SIM_RELEASE
endif
endif

ifeq ($(Build_Mode), HW_RELEASE)
all: .config_$(Build_Mode)_$(SGX_ARCH) $(Trust_Lib_Name) $(UnTrustLib_Name) Decryptor.so $(App_Name)
	@echo "The project has been built in release hardware mode."
	@echo "Please sign the enclaves (PHP.so, Decryptor.so, Enclave3.so) first with your signing keys before you run the $(App_Name) to launch and access the enclave."
	@echo "To sign the enclaves use the following commands:"
	@echo "   $(SGX_ENCLAVE_SIGNER) sign -key <key1> -enclave PHP.so -out <$(Enclave_Name_1)> -config PHP/PHP.config.xml"
	@echo "   $(SGX_ENCLAVE_SIGNER) sign -key <key2> -enclave Decryptor.so -out <$(Enclave_Name_2)> -config Decryptor/Decryptor.config.xml"
#	@echo "   $(SGX_ENCLAVE_SIGNER) sign -key <key3> -enclave Enclave3.so -out <$(Enclave_Name_3)> -config Enclave3/Enclave3.config.xml"
	@echo "You can also sign the enclaves using an external signing tool."
	@echo "To build the project in simulation mode set SGX_MODE=SIM. To build the project in prerelease mode set SGX_PRERELEASE=1 and SGX_MODE=HW."
else
all: .config_$(Build_Mode)_$(SGX_ARCH) $(Trust_Lib_Name) $(UnTrustLib_Name) $(Enclave_Name_2) $(App_Name)
ifeq ($(Build_Mode), HW_DEBUG)
	@echo "The project has been built in debug hardware mode."
else ifeq ($(Build_Mode), SIM_DEBUG)
	@echo "The project has been built in debug simulation mode."
else ifeq ($(Build_Mode), HW_PRERELEASE)
	@echo "The project has been built in pre-release hardware mode."
else ifeq ($(Build_Mode), SIM_PRERELEASE)
	@echo "The project has been built in pre-release simulation mode."
else
	@echo "The project has been built in release simulation mode."
endif
endif

.config_$(Build_Mode)_$(SGX_ARCH):
	@rm -rf .config_* $(App_Name) *.so *.a App/*.o Decryptor/*.o Decryptor/*_t.* Decryptor/*_u.* LocalAttestationCode/*.o LocalAttestationCode/*_t.* #Enclave3/*.o Enclave3/*_t.* Enclave3/*_u.*
	@touch .config_$(Build_Mode)_$(SGX_ARCH)

######## Library Objects ########

LocalAttestationCode/LocalAttestationCode_t.c LocalAttestationCode/LocalAttestationCode_t.h : $(SGX_EDGER8R) LocalAttestationCode/LocalAttestationCode.edl
	@cd LocalAttestationCode && $(SGX_EDGER8R) --trusted ../LocalAttestationCode/LocalAttestationCode.edl --search-path $(SGX_SDK)/include
	@echo "GEN  =>  $@"

LocalAttestationCode/LocalAttestationCode_t.o: LocalAttestationCode/LocalAttestationCode_t.c
	@$(CC) $(TrustLib_Compile_Flags) -c $< -o $@
	@echo "CC   <=  $<"

LocalAttestationCode/LocalAttestationTrustedWrapper.o: LocalAttestationCode/LocalAttestationTrustedWrapper.cpp LocalAttestationCode/LocalAttestationCode_t.h
	@$(CXX) $(TrustLib_Compile_Flags) $(TrustLib_Compile_Cxx_Flags) -c $< -o $@
	@echo "CC   <= $<"

LocalAttestationCode/LocalAttestationTrusted.o: LocalAttestationCode/LocalAttestationTrusted.cpp LocalAttestationCode/LocalAttestationCode_t.h
	@$(CXX) $(TrustLib_Compile_Flags) $(TrustLib_Compile_Cxx_Flags) -c $< -o $@
	@echo "CC   <= $<"

$(Trust_Lib_Name): LocalAttestationCode/LocalAttestationCode_t.o LocalAttestationCode/LocalAttestationTrustedWrapper.o LocalAttestationCode/LocalAttestationTrusted.o
	@$(AR) rcs $@ $^
	@echo "GEN  =>  $@"

CommonOpensslCode/Openssl_crypto.o: CommonOpensslCode/Openssl_crypto.cpp
	@$(CXX) -std=c++11 -nostdinc++ $(Enclave_Compile_Flags) -I$(OPENSSL_INCLUDES)  -c $< -o $@
	@echo "CXX  <=  $<"

#Untrusted_LocalAttestation/%.o: Untrusted_LocalAttestation/%.cpp
#	@$(CXX) $(UnTrustLib_Compile_Flags) -c $< -o $@
#	@echo "CC   <=  $<"

#$(UnTrustLib_Name): $(UnTrustLib_Cpp_Objects)
#	@$(AR) rcs $@ $^
#	@echo "GEN  =>  $@"

######## App Objects ########
Decryptor/Decryptor_u.c Decryptor/Decryptor_u.h: $(SGX_EDGER8R) Decryptor/Decryptor.edl
	@cd Decryptor && $(SGX_EDGER8R) --use-prefix --untrusted ../Decryptor/Decryptor.edl --search-path $(SGX_SDK)/include
	@echo "GEN  =>  $@"

App/Decryptor_u.o: Decryptor/Decryptor_u.c
	@$(CC) $(App_Compile_Flags) -c $< -o $@
	@echo "CC   <=  $<"

App/%.o: App/%.cpp Decryptor/Decryptor_u.h #Enclave3/Enclave3_u.h
	@$(CXX) $(App_Compile_Flags) -c $< -o $@
	@echo "CXX  <=  $<"

$(App_Name): App/App.o App/Sealing.o App/LocalAttestationUntrusted.o App/protobufLAInitiator.o App/protobufSgxLATransformsInitiator.o App/ProtobufLAMessages.pb.o   App/Decryptor_u.o #$(App_Cpp_Objects)# $(UnTrustLib_Name)
	@$(CXX) -Wl,--no-undefined $^ -o $@ $(App_Link_Flags)
	@echo "LINK =>  $@"

######### Crypto classes for enclave ############


######## Enclave Objects ########
Decryptor/Decryptor_t.c: $(SGX_EDGER8R) Decryptor/Decryptor.edl
	@cd Decryptor && $(SGX_EDGER8R)  --use-prefix --trusted ../Decryptor/Decryptor.edl --search-path $(SGX_SDK)/include
	@echo "GEN  =>  $@"

Decryptor/Decryptor_t.o: Decryptor/Decryptor_t.c
	@$(CC) $(Enclave_Compile_Flags) -c $< -o $@
	@echo "CC   <=  $<"

Decryptor/%Box.o: Decryptor/%Box.cpp 
	@$(CXX) -std=c++11 -nostdinc++ $(Enclave_Compile_Flags)  -c $< -o $@
	@echo "CXX  <=  $<"

Decryptor/ECDHKeypair.o: Decryptor/ECDHKeypair.cpp
	@$(CXX) -std=c++11 -nostdinc++ $(Enclave_Compile_Flags)  -c $< -o $@
	@echo "CXX   <=  $<"

Decryptor/DecryptorWrapper.o: Decryptor/DecryptorWrapper.cpp
	@$(CXX) -std=c++11 -nostdinc++ $(Enclave_Compile_Flags)  -c $< -o $@
	@echo "CXX  <=  $<"

Decryptor/Decryptor.o: Decryptor/Decryptor.cpp #Decryptor/HybridEncryptionBox.cpp Decryptor/ECDSASignatureBox.cpp Decryptor/ECDHKeypair.cpp Decryptor/SymmetricEncryptionBox.cpp
	@$(CXX) -std=c++11 -nostdinc++ $(Enclave_Compile_Flags)  -c $< -o $@
	@echo "CXX  <=  $<"

Decryptor.so: Decryptor/Decryptor_t.o Decryptor/DecryptorWrapper.o Decryptor/Decryptor.o $(Trust_Lib_Name) Decryptor/HybridEncryptionBox.o Decryptor/ECDSASignatureBox.o Decryptor/SymmetricEncryptionBox.o Decryptor/ECDHKeypair.o CommonOpensslCode/Openssl_crypto.o 
	@$(CXX) $^ -o $@ $(Decryptor_Link_Flags)
	@echo "LINK =>  $@"

$(Enclave_Name_2): Decryptor.so
	@$(SGX_ENCLAVE_SIGNER) sign -key Decryptor/Decryptor_private.pem -enclave Decryptor.so -out $@ -config Decryptor/Decryptor.config.xml
	@echo "SIGN =>  $@"

######## Clean ########
.PHONY: clean

clean:
	@rm -rf .config_* $(App_Name) *.so *.a App/*.o Decryptor/*.o Decryptor/*_t.* Decryptor/*_u.* LocalAttestationCode/*.o LocalAttestationCode/*_t.* CommonOpensslCode/*.o