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CMakeLists.txt
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CMakeLists.txt
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cmake_minimum_required (VERSION 3.0)
project (s2n C)
if(POLICY CMP0077)
cmake_policy(SET CMP0077 NEW) #option does nothing when a normal variable of the same name exists.
endif()
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
set(INSTALL_LIB_DIR lib CACHE PATH "Installation directory for libraries")
set(INSTALL_INCLUDE_DIR include CACHE PATH "Installation directory for header files")
set(INSTALL_CMAKE_DIR lib/cmake CACHE PATH "Installation directory for cmake files")
set(CMAKE_FIND_PACKAGE_PREFER_CONFIG TRUE)
option(S2N_NO_PQ "Disables all Post Quantum Crypto code. You likely want this
for older compilers or uncommon platforms." OFF)
option(S2N_NO_PQ_ASM "Turns off the ASM for PQ Crypto even if it's available for the toolchain.
You likely want this on older compilers." OFF)
option(SEARCH_LIBCRYPTO "Set this if you want to let S2N search libcrypto for you,
otherwise a crypto target needs to be defined." ON)
option(UNSAFE_TREAT_WARNINGS_AS_ERRORS "Compiler warnings are treated as errors. Warnings may
indicate danger points where you should verify with the S2N-TLS developers that the security of
the library is not compromised. Turn this OFF to ignore warnings." ON)
option(S2N_INTERN_LIBCRYPTO "This ensures that s2n-tls is compiled and deployed with a specific
version of libcrypto by interning the code and hiding symbols. This also enables s2n-tls to be
loaded in an application with an otherwise conflicting libcrypto version." OFF)
option(S2N_LTO, "Enables link time optimizations when building s2n-tls." OFF)
option(S2N_STACKTRACE "Enables stacktrace functionality in s2n-tls." ON)
# Turn BUILD_TESTING=ON by default
include(CTest)
file(GLOB API_HEADERS "api/*.h")
file(GLOB CRYPTO_HEADERS "crypto/*.h")
file(GLOB CRYPTO_SRC "crypto/*.c")
file(GLOB ERROR_HEADERS "error/*.h")
file(GLOB ERROR_SRC "error/*.c")
file(GLOB STUFFER_HEADERS "stuffer/*.h")
file(GLOB STUFFER_SRC "stuffer/*.c")
file(GLOB_RECURSE TLS_HEADERS "tls/*.h")
file(GLOB_RECURSE TLS_SRC "tls/*.c")
file(GLOB UTILS_HEADERS "utils/*.h")
file(GLOB UTILS_SRC "utils/*.c")
# Always include the top-level pq-crypto/ files
file(GLOB PQ_HEADERS "pq-crypto/*.h")
file(GLOB PQ_SRC "pq-crypto/*.c")
message(STATUS "Detected CMAKE_SYSTEM_PROCESSOR as ${CMAKE_SYSTEM_PROCESSOR}")
if(CMAKE_SIZEOF_VOID_P EQUAL 4)
message(STATUS "Detected 32-Bit system - disabling PQ crypto assembly optimizations")
set(S2N_NO_PQ_ASM ON)
else()
message(STATUS "Detected 64-Bit system")
endif()
if(S2N_NO_PQ)
# PQ is disabled, so we do not include any PQ crypto code
message(STATUS "S2N_NO_PQ flag was detected - disabling PQ crypto")
set(S2N_NO_PQ_ASM ON)
else()
# PQ is enabled, so include all of the PQ crypto code
file(GLOB PQ_HEADERS
"pq-crypto/*.h"
"pq-crypto/bike_r1/*.h"
"pq-crypto/bike_r2/*.h"
"pq-crypto/bike_r3/*.h"
"pq-crypto/sike_r1/*.h"
"pq-crypto/kyber_r2/*.h"
"pq-crypto/kyber_90s_r2/*.h"
"pq-crypto/kyber_r3/*.h"
"pq-crypto/sike_r3/*.h")
# The SIKE r1 code #includes .c files directly; including sike_r1/*.c
# here breaks the build due to duplicates. The SIKE r3 code does not have this issue.
file(GLOB PQ_SRC
"pq-crypto/*.c"
"pq-crypto/bike_r1/*.c"
"pq-crypto/bike_r2/*.c"
"pq-crypto/bike_r3/*.c"
"pq-crypto/sike_r1/fp_generic_r1.c"
"pq-crypto/sike_r1/P503_r1.c"
"pq-crypto/sike_r1/sike_r1_kem.c"
"pq-crypto/sike_r1/fips202_r1.c"
"pq-crypto/kyber_r2/*.c"
"pq-crypto/kyber_90s_r2/*.c"
"pq-crypto/kyber_r3/*.c"
"pq-crypto/sike_r3/*.c")
endif()
##be nice to visual studio users
if(MSVC)
source_group("Header Files\\s2n\\api" FILES ${API_HEADERS})
source_group("Header Files\\s2n\\crypto" FILES ${CRYPTO_HEADERS})
source_group("Header Files\\s2n\\error" FILES ${ERROR_HEADERS})
source_group("Header Files\\s2n\\pq-crypto" FILES ${PQ_HEADERS})
source_group("Header Files\\s2n\\stuffer" FILES ${STUFFER_HEADERS})
source_group("Header Files\\s2n\\tls" FILES ${TLS_HEADERS})
source_group("Header Files\\s2n\\utils" FILES ${UTILS_HEADERS})
source_group("Source Files\\crypto" FILES ${CRYPTO_SRC})
source_group("Source Files\\error" FILES ${ERROR_SRC})
source_group("Source Files\\pq-crypto" FILES ${PQ_SRC})
source_group("Source Files\\stuffer" FILES ${STUFFER_SRC})
source_group("Source Files\\tls" FILES ${TLS_SRC})
source_group("Source Files\\utils" FILES ${UTILS_SRC})
else()
set(THREADS_PREFER_PTHREAD_FLAG ON)
find_package(Threads REQUIRED)
endif()
# The PQ ASM try_compile has to come after we turn on pthread.
# If S2N_NO_PQ_ASM is defined, all PQ assembly options will
# remain turned off by default.
set(SIKEP434R3_ASM_SUPPORTED false)
set(ADX_SUPPORTED false)
if(S2N_NO_PQ_ASM)
message(STATUS "S2N_NO_PQ_ASM flag was detected - disabling PQ crypto assembly code")
else()
enable_language(ASM)
# sikep434r3
try_compile(
SIKEP434R3_ASM_SUPPORTED
${CMAKE_BINARY_DIR}
SOURCES
"${CMAKE_CURRENT_LIST_DIR}/tests/features/noop_main.c"
"${CMAKE_CURRENT_LIST_DIR}/pq-crypto/sike_r3/sikep434r3.c"
"${CMAKE_CURRENT_LIST_DIR}/pq-crypto/sike_r3/sikep434r3_fp_x64_asm.S"
)
if(SIKEP434R3_ASM_SUPPORTED)
file(GLOB SIKEP434R3_ASM_SRC "pq-crypto/sike_r3/sikep434r3_fp_x64_asm.S")
list(APPEND PQ_SRC ${SIKEP434R3_ASM_SRC})
# The ADX instruction set is preferred for best performance, but not necessary.
try_compile(
ADX_SUPPORTED
${CMAKE_BINARY_DIR}
SOURCES
"${CMAKE_CURRENT_LIST_DIR}/tests/features/noop_main.c"
"${CMAKE_CURRENT_LIST_DIR}/pq-crypto/sike_r3/sikep434r3.c"
"${CMAKE_CURRENT_LIST_DIR}/pq-crypto/sike_r3/sikep434r3_fp_x64_asm.S"
COMPILE_DEFINITIONS
"-DS2N_ADX"
)
endif()
# BIKE Round-3 code has several different optimizations which require
# specific compiler flags to be supported by the compiler.
# So for each needed instruction set extension we check if the compiler
# supports it and set proper compiler flags to be added later to the
# BIKE compilation units.
if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "^(x86_64|amd64|AMD64)$")
# First, check if the compiler supports the specific instruction set
# extensions. For example, gcc-4 doesn't fully support AVX-512, while
# gcc-7 doesn't support VPCLMUL extension.
set(BIKE_R3_AVX2_FLAGS "-mavx2")
try_compile(
BIKE_R3_AVX2_SUPPORTED
${CMAKE_BINARY_DIR}
SOURCES
"${CMAKE_CURRENT_LIST_DIR}/tests/features/noop_main.c"
"${CMAKE_CURRENT_LIST_DIR}/pq-crypto/bike_r3/gf2x_mul_avx2.c"
CMAKE_FLAGS "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_SOURCE_DIR}"
COMPILE_DEFINITIONS "${BIKE_R3_AVX2_FLAGS} -DS2N_BIKE_R3_AVX2"
)
set(BIKE_R3_AVX512_FLAGS "-mavx512f -mavx512bw -mavx512dq")
try_compile(
BIKE_R3_AVX512_SUPPORTED
${CMAKE_BINARY_DIR}
SOURCES
"${CMAKE_CURRENT_LIST_DIR}/tests/features/noop_main.c"
"${CMAKE_CURRENT_LIST_DIR}/pq-crypto/bike_r3/gf2x_mul_avx512.c"
CMAKE_FLAGS "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_SOURCE_DIR}"
COMPILE_DEFINITIONS "${BIKE_R3_AVX512_FLAGS} -DS2N_BIKE_R3_AVX512"
)
set(BIKE_R3_PCLMUL_FLAGS "-mpclmul -msse2")
try_compile(
BIKE_R3_PCLMUL_SUPPORTED
${CMAKE_BINARY_DIR}
SOURCES
"${CMAKE_CURRENT_LIST_DIR}/tests/features/noop_main.c"
"${CMAKE_CURRENT_LIST_DIR}/pq-crypto/bike_r3/gf2x_mul_base_pclmul.c"
CMAKE_FLAGS "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_SOURCE_DIR}"
COMPILE_DEFINITIONS "${BIKE_R3_PCLMUL_FLAGS} -DS2N_BIKE_R3_PCLMUL"
)
set(BIKE_R3_VPCLMUL_FLAGS "-mvpclmulqdq -mavx512f -mavx512bw -mavx512dq")
try_compile(
BIKE_R3_VPCLMUL_SUPPORTED
${CMAKE_BINARY_DIR}
SOURCES
"${CMAKE_CURRENT_LIST_DIR}/tests/features/noop_main.c"
"${CMAKE_CURRENT_LIST_DIR}/pq-crypto/bike_r3/gf2x_mul_base_vpclmul.c"
CMAKE_FLAGS "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_SOURCE_DIR}"
COMPILE_DEFINITIONS "${BIKE_R3_VPCLMUL_FLAGS} -DS2N_BIKE_R3_VPCLMUL"
)
if(BIKE_R3_AVX2_SUPPORTED OR BIKE_R3_AVX512_SUPPORTED OR BIKE_R3_PCLMUL_SUPPORTED OR BIKE_R3_VPCLMUL_SUPPORTED)
set(BIKE_R3_X86_64_OPT_SUPPORTED ON)
endif()
endif()
# Kyber Round-3 code has several different optimizations which require
# specific compiler flags to be supported by the compiler.
# So for each needed instruction set extension we check if the compiler
# supports it and set proper compiler flags to be added later to the
# Kyber compilation units.
if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "^(x86_64|amd64|AMD64)$")
set(KYBER512R3_AVX2_BMI2_FLAGS "-mavx2 -mavx -mbmi2")
try_compile(KYBER512R3_AVX2_BMI2_SUPPORTED
${CMAKE_BINARY_DIR}
"${CMAKE_CURRENT_LIST_DIR}/tests/features/noop_main.c"
COMPILE_DEFINITIONS ${KYBER512R3_AVX2_BMI2_FLAGS})
if(KYBER512R3_AVX2_BMI2_SUPPORTED)
set(KYBER512R3_AVX2_BMI2_OPT_SUPPORTED ON)
endif()
endif()
endif()
if(KYBER512R3_AVX2_BMI2_OPT_SUPPORTED)
FILE(GLOB KYBER512R3_AVX2_BMI2_ASM_SRCS "pq-crypto/kyber_r3/*_avx2.S")
list(APPEND PQ_SRC ${KYBER512R3_AVX2_BMI2_ASM_SRCS})
endif()
# Probe for execinfo.h extensions (not present on some systems, notably android)
include(CheckCSourceCompiles)
# Determine if execinfo.h is available
if(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
try_compile(
S2N_HAVE_EXECINFO
${CMAKE_BINARY_DIR}
SOURCES "${CMAKE_CURRENT_LIST_DIR}/tests/features/execinfo.c"
LINK_LIBRARIES execinfo
)
else()
try_compile(
S2N_HAVE_EXECINFO
${CMAKE_BINARY_DIR}
SOURCES "${CMAKE_CURRENT_LIST_DIR}/tests/features/execinfo.c"
)
endif()
# Determine if cpuid.h is available
try_compile(
S2N_CPUID_AVAILABLE
${CMAKE_BINARY_DIR}
SOURCES "${CMAKE_CURRENT_LIST_DIR}/tests/features/cpuid.c"
)
# Determine if features.h is available
try_compile(
S2N_FEATURES_AVAILABLE
${CMAKE_BINARY_DIR}
SOURCES "${CMAKE_CURRENT_LIST_DIR}/tests/features/features.c"
)
# Determine if __attribute__((fallthrough)) is available
try_compile(
FALL_THROUGH_SUPPORTED
${CMAKE_BINARY_DIR}
SOURCES "${CMAKE_CURRENT_LIST_DIR}/tests/features/fallthrough.c"
COMPILE_DEFINITIONS "-Werror"
)
# Determine if __restrict__ is available
try_compile(
__RESTRICT__SUPPORTED
${CMAKE_BINARY_DIR}
SOURCES "${CMAKE_CURRENT_LIST_DIR}/tests/features/__restrict__.c"
COMPILE_DEFINITIONS "-Werror"
)
# Determine if madvise() is available
try_compile(
MADVISE_SUPPORTED
${CMAKE_BINARY_DIR}
SOURCES "${CMAKE_CURRENT_LIST_DIR}/tests/features/madvise.c"
COMPILE_DEFINITIONS "-Werror"
)
# Determine if minherit() is available
try_compile(
MINHERIT_SUPPORTED
${CMAKE_BINARY_DIR}
SOURCES "${CMAKE_CURRENT_LIST_DIR}/tests/features/minherit.c"
COMPILE_DEFINITIONS "-Werror"
)
# Determine if clone() is available
try_compile(
CLONE_SUPPORTED
${CMAKE_BINARY_DIR}
SOURCES "${CMAKE_CURRENT_LIST_DIR}/tests/features/clone.c"
COMPILE_DEFINITIONS "-Werror"
)
if(APPLE)
set(OS_LIBS c Threads::Threads)
elseif(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
set(OS_LIBS thr execinfo)
elseif(CMAKE_SYSTEM_NAME STREQUAL "NetBSD")
set(OS_LIBS Threads::Threads)
elseif(CMAKE_SYSTEM_NAME STREQUAL "Android")
set(OS_LIBS Threads::Threads dl)
else()
set(OS_LIBS Threads::Threads dl rt)
endif()
# Compiling the unit tests rely on S2N_TEST_IN_FIPS_MODE to be set correctly
if(S2N_FIPS)
add_definitions(-DS2N_TEST_IN_FIPS_MODE)
endif()
file(GLOB S2N_HEADERS
${API_HEADERS}
${CRYPTO_HEADERS}
${ERROR_HEADERS}
${PQ_HEADERS}
${STUFFER_HEADERS}
${TLS_HEADERS}
${UTILS_HEADERS}
)
file(GLOB S2N_SRC
${CRYPTO_SRC}
${ERROR_SRC}
${PQ_SRC}
${STUFFER_SRC}
${TLS_SRC}
${UTILS_SRC}
)
add_library(${PROJECT_NAME} ${S2N_HEADERS} ${S2N_SRC})
set_target_properties(${PROJECT_NAME} PROPERTIES LINKER_LANGUAGE C)
set(CMAKE_C_FLAGS_DEBUGOPT "")
target_compile_options(${PROJECT_NAME} PRIVATE -pedantic -std=gnu99 -Wall -Wimplicit -Wunused -Wcomment -Wchar-subscripts
-Wuninitialized -Wshadow -Wcast-align -Wwrite-strings -Wno-deprecated-declarations -Wno-unknown-pragmas -Wformat-security
-Wno-missing-braces -Wa,--noexecstack
)
if (UNSAFE_TREAT_WARNINGS_AS_ERRORS)
target_compile_options(${PROJECT_NAME} PRIVATE -Werror )
endif ()
if(BUILD_TESTING AND BUILD_SHARED_LIBS)
target_compile_options(${PROJECT_NAME} PRIVATE -fvisibility=default)
else()
target_compile_options(${PROJECT_NAME} PRIVATE -fvisibility=hidden -DS2N_EXPORTS)
endif()
if(S2N_LTO)
target_compile_options(${PROJECT_NAME} PRIVATE -flto)
# if we're building a static lib, make it easier for consuming applications to also perform LTO
if(NOT BUILD_SHARED_LIBS)
target_compile_options(${PROJECT_NAME} PRIVATE -ffunction-sections -fdata-sections)
endif()
endif()
if(NOT APPLE)
set(CMAKE_SHARED_LINKER_FLAGS -Wl,-z,noexecstack,-z,relro,-z,now)
endif()
if(S2N_NO_PQ)
target_compile_options(${PROJECT_NAME} PUBLIC -DS2N_NO_PQ)
endif()
if(SIKEP434R3_ASM_SUPPORTED)
target_compile_options(${PROJECT_NAME} PUBLIC -DS2N_SIKE_P434_R3_ASM)
message(STATUS "Enabling SIKEP434R3 assembly code")
endif()
if(BIKE_R3_X86_64_OPT_SUPPORTED)
# If any of the BIKE_R3 x86_64 optimizations is supported (this was checked
# earlier in the file), we add the required compile flags to files that
# contain the optimized code.
message(STATUS "Enabling BIKE_R3 x86_64 optimizations")
if(BIKE_R3_AVX2_SUPPORTED)
message(STATUS "\t Enabling BIKE_R3_AVX2")
FILE(GLOB BIKE_R3_AVX2_SRCS "pq-crypto/bike_r3/*_avx2.c")
set_source_files_properties(${BIKE_R3_AVX2_SRCS} PROPERTIES COMPILE_FLAGS -mavx2)
target_compile_options(${PROJECT_NAME} PUBLIC -DS2N_BIKE_R3_AVX2)
endif()
if(BIKE_R3_AVX512_SUPPORTED)
message(STATUS "\t Enabling BIKE_R3_AVX512")
FILE(GLOB BIKE_R3_AVX512_SRCS "pq-crypto/bike_r3/*_avx512.c")
set_source_files_properties(${BIKE_R3_AVX512_SRCS} PROPERTIES COMPILE_FLAGS ${BIKE_R3_AVX512_FLAGS})
target_compile_options(${PROJECT_NAME} PUBLIC -DS2N_BIKE_R3_AVX512)
endif()
if(BIKE_R3_PCLMUL_SUPPORTED)
message(STATUS "\t Enabling BIKE_R3_PCLMUL")
FILE(GLOB BIKE_R3_PCLMUL_SRCS "pq-crypto/bike_r3/*_pclmul.c")
set_source_files_properties(${BIKE_R3_PCLMUL_SRCS} PROPERTIES COMPILE_FLAGS ${BIKE_R3_PCLMUL_FLAGS})
target_compile_options(${PROJECT_NAME} PUBLIC -DS2N_BIKE_R3_PCLMUL)
endif()
if(BIKE_R3_VPCLMUL_SUPPORTED)
message(STATUS "\t Enabling BIKE_R3_VPCLMUL")
FILE(GLOB BIKE_R3_VPCLMUL_SRCS "pq-crypto/bike_r3/*_vpclmul.c")
set_source_files_properties(${BIKE_R3_VPCLMUL_SRCS} PROPERTIES COMPILE_FLAGS ${BIKE_R3_VPCLMUL_FLAGS})
target_compile_options(${PROJECT_NAME} PUBLIC -DS2N_BIKE_R3_VPCLMUL)
endif()
endif()
if(KYBER512R3_AVX2_BMI2_OPT_SUPPORTED)
FILE(GLOB KYBER512R3_AVX2_BMI2_SRCS "pq-crypto/kyber_r3/*.c")
set_source_files_properties(${KYBER512R3_AVX2_BMI2_SRCS} PROPERTIES COMPILE_FLAGS ${KYBER512R3_AVX2_BMI2_FLAGS})
target_compile_options(${PROJECT_NAME} PUBLIC -DS2N_KYBER512R3_AVX2_BMI2)
message(STATUS "Enabling Kyber_R3 x86_64 optimizations")
endif()
if(ADX_SUPPORTED)
target_compile_options(${PROJECT_NAME} PUBLIC -DS2N_ADX)
message(STATUS "Support for ADX assembly instructions detected")
endif()
if(S2N_HAVE_EXECINFO AND S2N_STACKTRACE)
target_compile_options(${PROJECT_NAME} PUBLIC -DS2N_STACKTRACE)
else()
message(STATUS "Disabling stacktrace functionality")
endif()
if(S2N_CPUID_AVAILABLE)
target_compile_options(${PROJECT_NAME} PUBLIC -DS2N_CPUID_AVAILABLE)
endif()
if(S2N_FEATURES_AVAILABLE)
target_compile_options(${PROJECT_NAME} PUBLIC -DS2N_FEATURES_AVAILABLE)
endif()
target_compile_options(${PROJECT_NAME} PUBLIC -fPIC)
target_compile_definitions(${PROJECT_NAME} PRIVATE -D_POSIX_C_SOURCE=200809L)
if(CMAKE_BUILD_TYPE MATCHES Release)
target_compile_definitions(${PROJECT_NAME} PRIVATE -D_FORTIFY_SOURCE=2)
endif()
if(NO_STACK_PROTECTOR)
target_compile_options(${PROJECT_NAME} PRIVATE -Wstack-protector -fstack-protector-all)
endif()
if(S2N_UNSAFE_FUZZING_MODE)
target_compile_options(${PROJECT_NAME} PRIVATE -fsanitize-coverage=trace-pc-guard -fsanitize=address,undefined,leak -fuse-ld=gold -DS2N_ADDRESS_SANITIZER=1)
endif()
if (FALL_THROUGH_SUPPORTED)
target_compile_options(${PROJECT_NAME} PUBLIC -DS2N_FALL_THROUGH_SUPPORTED)
endif()
if (__RESTRICT__SUPPORTED)
target_compile_options(${PROJECT_NAME} PUBLIC -DS2N___RESTRICT__SUPPORTED)
endif()
if (MADVISE_SUPPORTED)
target_compile_options(${PROJECT_NAME} PUBLIC -DS2N_MADVISE_SUPPORTED)
message(STATUS "madvise() support detected")
endif()
if (MINHERIT_SUPPORTED)
target_compile_options(${PROJECT_NAME} PUBLIC -DS2N_MINHERIT_SUPPORTED)
message(STATUS "minherit() support detected")
endif()
if (CLONE_SUPPORTED)
target_compile_options(${PROJECT_NAME} PUBLIC -DS2N_CLONE_SUPPORTED)
message(STATUS "clone() support detected")
endif()
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules")
if (NOT $ENV{S2N_LIBCRYPTO} STREQUAL "awslc")
# add cast-qual back in for non AWS-LC
target_compile_options(${PROJECT_NAME} PRIVATE -Wcast-qual)
endif()
# For interning, we need to find the static libcrypto library. Cmake configs
# can branch on the variable BUILD_SHARED_LIBS to e.g. avoid having to define
# multiple targets. An example is AWS-LC:
# https://github.com/awslabs/aws-lc/blob/main/crypto/cmake/crypto-config.cmake#L5
if (S2N_INTERN_LIBCRYPTO)
set(BUILD_SHARED_LIBS_BACKUP ${BUILD_SHARED_LIBS})
set(BUILD_SHARED_LIBS OFF)
endif()
# Work around target differences
if (TARGET crypto)
message(STATUS "S2N found target: crypto")
set(LINK_LIB "crypto")
else()
find_package(crypto REQUIRED)
message(STATUS "Using libcrypto from the cmake path")
set(LINK_LIB "AWS::crypto")
endif()
if (S2N_INTERN_LIBCRYPTO)
# Restore the old BUILD_SHARED_LIBS value
set(BUILD_SHARED_LIBS ${BUILD_SHARED_LIBS_BACKUP})
message(STATUS "Enabling libcrypto interning")
endif()
# Determine if EVP_md5_sha1 is available in libcrypto
try_compile(
LIBCRYPTO_SUPPORTS_EVP_MD5_SHA1_HASH
${CMAKE_BINARY_DIR}
SOURCES "${CMAKE_CURRENT_LIST_DIR}/tests/features/evp_md5_sha1.c"
LINK_LIBRARIES ${LINK_LIB} ${OS_LIBS}
)
if (LIBCRYPTO_SUPPORTS_EVP_MD5_SHA1_HASH)
target_compile_options(${PROJECT_NAME} PUBLIC -DS2N_LIBCRYPTO_SUPPORTS_EVP_MD5_SHA1_HASH)
endif()
# Determine if RC4 is available in libcrypto
try_compile(
LIBCRYPTO_SUPPORTS_EVP_RC4
${CMAKE_BINARY_DIR}
SOURCES "${CMAKE_CURRENT_LIST_DIR}/tests/features/evp_rc4.c"
LINK_LIBRARIES ${LINK_LIB} ${OS_LIBS}
)
if (LIBCRYPTO_SUPPORTS_EVP_RC4)
target_compile_options(${PROJECT_NAME} PUBLIC -DS2N_LIBCRYPTO_SUPPORTS_EVP_RC4)
endif()
# Determine if EVP_MD_CTX_set_pkey_ctx is available in libcrypto
try_compile(
LIBCRYPTO_SUPPORTS_EVP_MD_CTX_SET_PKEY_CTX
${CMAKE_BINARY_DIR}
SOURCES "${CMAKE_CURRENT_LIST_DIR}/tests/features/evp_md_ctx_set_pkey_ctx.c"
LINK_LIBRARIES ${LINK_LIB} ${OS_LIBS}
CMAKE_FLAGS ${ADDITIONAL_FLAGS}
)
if (LIBCRYPTO_SUPPORTS_EVP_MD_CTX_SET_PKEY_CTX)
target_compile_options(${PROJECT_NAME} PUBLIC -DS2N_LIBCRYPTO_SUPPORTS_EVP_MD_CTX_SET_PKEY_CTX)
endif()
if (S2N_INTERN_LIBCRYPTO)
# Check if the AWS::crypto target has beeen added and handle it
if (TARGET AWS::crypto)
# Get the target library type (shared or static)
get_target_property(target_type AWS::crypto TYPE)
message(STATUS "AWS::crypto target type: ${target_type}")
# If we didn't find the a target with static library type, fallback to
# existing crypto_STATIC_LIBRARY and crypto_INCLUDE_DIR
if (target_type STREQUAL STATIC_LIBRARY)
# We need an path to the include directory and libcrypto.a archive.
# The finder module defines these appropriately, but if we go through
# the target config we need to query this information from the target
# first.
get_target_property(crypto_STATIC_LIBRARY AWS::crypto LOCATION)
get_target_property(crypto_INCLUDE_DIR AWS::crypto INTERFACE_INCLUDE_DIRECTORIES)
endif()
endif()
if (NOT crypto_STATIC_LIBRARY)
message(FATAL_ERROR "libcrypto interning requires a static build of libcrypto.a to be available")
endif()
message(STATUS "crypto_STATIC_LIBRARY: ${crypto_STATIC_LIBRARY}")
message(STATUS "crypto_INCLUDE_DIR: ${crypto_INCLUDE_DIR}")
# Don't call link_target_libraries here, just make sure the libcrypto include dir is in the path
include_directories("${crypto_INCLUDE_DIR}")
add_custom_command(
OUTPUT libcrypto.symbols
COMMAND
# copy the static version of libcrypto
cp ${crypto_STATIC_LIBRARY} s2n_libcrypto.a &&
# dump all of the symbols and prefix them with `s2n$`
bash -c "nm s2n_libcrypto.a | awk '/ [A-Z] /{print $3\" s2n$\"$3}' | sort | uniq > libcrypto.symbols" &&
# redefine the libcrypto libary symbols
objcopy --redefine-syms libcrypto.symbols s2n_libcrypto.a &&
rm -rf s2n_libcrypto &&
mkdir s2n_libcrypto &&
cd s2n_libcrypto &&
# extract libcrypto objects from the archive
ar x ../s2n_libcrypto.a &&
# rename all of the object files so we don't have any object name collisions
bash -c "find . -name '*.o' -type f -print0 | xargs -0 -n1 -- basename | xargs -I{} mv {} s2n_crypto__{}"
VERBATIM
)
add_custom_target(s2n_libcrypto ALL
DEPENDS libcrypto.symbols
)
add_dependencies(${PROJECT_NAME} s2n_libcrypto)
add_definitions(-DS2N_INTERN_LIBCRYPTO)
if ((BUILD_SHARED_LIBS AND BUILD_TESTING) OR NOT BUILD_SHARED_LIBS)
# if libcrypto needs to be interned, rewrite libcrypto references so use of internal functions will link correctly
add_custom_command(
TARGET ${PROJECT_NAME} PRE_LINK
COMMAND
find "${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/${PROJECT_NAME}.dir" -name '*.c.o' -exec objcopy --redefine-syms libcrypto.symbols {} \\\;
)
endif()
# copy the static libcrypto into the final artifact
if (BUILD_SHARED_LIBS)
if (BUILD_TESTING)
# if we're building tests, we export the prefixed symbols so tests can link to them
set_target_properties(${PROJECT_NAME} PROPERTIES LINK_FLAGS
"-Wl,--whole-archive s2n_libcrypto.a -Wl,--no-whole-archive")
else()
# if we're not building tests, then just copy the original archive, unmodified
set_target_properties(${PROJECT_NAME} PROPERTIES LINK_FLAGS
"-Wl,--whole-archive ${crypto_STATIC_LIBRARY} -Wl,--no-whole-archive -Wl,--exclude-libs=ALL")
endif()
else()
# add all of the prefixed symbols to the archive
add_custom_command(
TARGET ${PROJECT_NAME} POST_BUILD
DEPENDS libcrypto.symbols
COMMAND
bash -c "ar -r lib/libs2n.a s2n_libcrypto/*.o"
VERBATIM
)
endif()
else()
# LINK_LIB is set above after checking targets. It handles the find_package craziness.
target_link_libraries(${PROJECT_NAME} PUBLIC ${LINK_LIB})
endif()
target_link_libraries(${PROJECT_NAME} PUBLIC ${OS_LIBS} m)
target_include_directories(${PROJECT_NAME} PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>)
target_include_directories(${PROJECT_NAME} PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/api> $<INSTALL_INTERFACE:include>)
if (BUILD_TESTING)
enable_testing()
file(GLOB TESTLIB_SRC "tests/testlib/*.c")
file(GLOB TESTLIB_HEADERS "tests/testlib/*.h" "tests/s2n_test.h")
add_library(testss2n STATIC ${TESTLIB_HEADERS} ${TESTLIB_SRC})
target_include_directories(testss2n PUBLIC tests)
target_compile_options(testss2n PRIVATE -std=gnu99)
target_link_libraries(testss2n PUBLIC ${PROJECT_NAME})
if (S2N_INTERN_LIBCRYPTO)
# if libcrypto was interned, rewrite libcrypto symbols so use of internal functions will link correctly
add_custom_command(
TARGET testss2n POST_BUILD
COMMAND
objcopy --redefine-syms libcrypto.symbols lib/libtestss2n.a
)
endif()
#run unit tests
file (GLOB TEST_LD_PRELOAD "tests/LD_PRELOAD/*.c")
add_library(allocator_overrides SHARED ${TEST_LD_PRELOAD})
file(GLOB UNITTESTS_SRC "tests/unit/*.c")
foreach(test_case ${UNITTESTS_SRC})
string(REGEX REPLACE ".+\\/(.+)\\.c" "\\1" test_case_name ${test_case})
add_executable(${test_case_name} ${test_case})
target_include_directories(${test_case_name} PRIVATE api)
target_include_directories(${test_case_name} PRIVATE ./)
target_include_directories(${test_case_name} PRIVATE tests)
target_link_libraries(${test_case_name} PRIVATE testss2n)
if (S2N_INTERN_LIBCRYPTO)
# if libcrypto was interned, rewrite libcrypto symbols so use of internal functions will link correctly
add_custom_command(
TARGET ${test_case_name} PRE_LINK
COMMAND
find . -name '${test_case_name}.c.o' -exec objcopy --redefine-syms libcrypto.symbols {} \\\;
)
endif()
target_compile_options(${test_case_name} PRIVATE -Wno-implicit-function-declaration -Wno-deprecated -D_POSIX_C_SOURCE=200809L -std=gnu99)
add_test(NAME ${test_case_name} COMMAND $<TARGET_FILE:${test_case_name}> WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/tests/unit)
set_property(
TEST
${test_case_name}
PROPERTY
ENVIRONMENT LD_PRELOAD=$<TARGET_FILE:allocator_overrides>)
set_property(
TEST
${test_case_name}
PROPERTY
ENVIRONMENT S2N_DONT_MLOCK=1)
endforeach(test_case)
add_executable(s2nc "bin/s2nc.c" "bin/echo.c" "bin/https.c" "bin/common.c")
target_link_libraries(s2nc ${PROJECT_NAME})
target_include_directories(s2nc PRIVATE api)
target_compile_options(s2nc PRIVATE -std=gnu99 -D_POSIX_C_SOURCE=200112L)
add_executable(s2nd "bin/s2nd.c" "bin/echo.c" "bin/https.c" "bin/common.c")
target_link_libraries(s2nd ${PROJECT_NAME})
target_include_directories(s2nd PRIVATE api)
target_compile_options(s2nd PRIVATE -std=gnu99 -D_POSIX_C_SOURCE=200112L)
if(S2N_LTO)
target_compile_options(s2nc PRIVATE -flto)
target_compile_options(s2nd PRIVATE -flto)
endif()
if(BENCHMARK)
find_package(benchmark REQUIRED)
file(GLOB BENCHMARK_SRC "tests/benchmark/*.cc")
file(GLOB BENCHMARK_UTILS "tests/benchmark/utils/*.cc")
enable_language(CXX)
foreach(benchmark ${BENCHMARK_SRC})
string(REGEX REPLACE ".+\\/(.+)\\.cc" "\\1" benchmark_name ${benchmark})
add_executable(${benchmark_name} ${benchmark} "bin/echo.c" "bin/common.c" ${BENCHMARK_UTILS})
target_include_directories(${benchmark_name} PRIVATE api)
target_include_directories(${benchmark_name} PRIVATE tests)
target_link_libraries(${benchmark_name} PUBLIC ${PROJECT_NAME} testss2n benchmark::benchmark)
# Based off the flags in tests/benchmark/Makefile
target_compile_options(${benchmark_name} PRIVATE -pedantic -Wall -Werror -Wunused -Wcomment -Wchar-subscripts
-Wuninitialized -Wshadow -Wcast-qual -Wcast-align -Wwrite-strings -Wno-deprecated-declarations
-Wno-unknown-pragmas -Wformat-security -Wno-missing-braces -fvisibility=hidden -Wno-unreachable-code
-Wno-unused-but-set-variable)
endforeach(benchmark)
endif()
endif()
#install the s2n files
install(FILES ${API_HEADERS} DESTINATION "include/" COMPONENT Development)
if (UNIX AND NOT APPLE)
include(GNUInstallDirs)
elseif(NOT DEFINED CMAKE_INSTALL_LIBDIR)
set(CMAKE_INSTALL_LIBDIR "lib")
endif()
install(
TARGETS ${PROJECT_NAME}
EXPORT ${PROJECT_NAME}-targets
ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR} COMPONENT Development
LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} COMPONENT Runtime
RUNTIME DESTINATION bin COMPONENT Runtime
)
configure_file("cmake/${PROJECT_NAME}-config.cmake"
"${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config.cmake"
@ONLY)
if (BUILD_SHARED_LIBS)
set (TARGET_DIR "shared")
else()
set (TARGET_DIR "static")
endif()
install(EXPORT "${PROJECT_NAME}-targets"
DESTINATION "${CMAKE_INSTALL_LIBDIR}/${PROJECT_NAME}/cmake/${TARGET_DIR}"
NAMESPACE AWS::
COMPONENT Development)
install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config.cmake"
DESTINATION "${CMAKE_INSTALL_LIBDIR}/${PROJECT_NAME}/cmake/"
COMPONENT Development)
install(FILES "cmake/modules/Findcrypto.cmake"
DESTINATION "${CMAKE_INSTALL_LIBDIR}/${PROJECT_NAME}/cmake/modules/"
COMPONENT Development)