include_directories(. ../include)

if(APPLE)
  if (${ARCH} STREQUAL "x86")
    set(PERLASM_FLAGS "-fPIC")
  endif()
  set(PERLASM_STYLE macosx)
  set(ASM_EXT S)
  enable_language(ASM)
elseif(UNIX)
  if (${ARCH} STREQUAL "aarch64")
    # The "armx" Perl scripts look for "64" in the style argument
    # in order to decide whether to generate 32- or 64-bit asm.
    set(PERLASM_STYLE linux64)
  elseif (${ARCH} STREQUAL "x86")
    set(PERLASM_FLAGS "-fPIC")
    set(PERLASM_STYLE elf)
  else()
    set(PERLASM_STYLE elf)
  endif()
  set(ASM_EXT S)
  enable_language(ASM)
else()
  if (CMAKE_CL_64)
    message("Using nasm")
    set(PERLASM_STYLE nasm)
  else()
    message("Using win32n")
    set(PERLASM_STYLE win32n)
  endif()

  # On Windows, we use the NASM output, specifically built with Yasm.
  set(ASM_EXT asm)
  enable_language(ASM_NASM)
endif()

function(perlasm dest src)
  add_custom_command(
    OUTPUT ${dest}
    COMMAND ${PERL_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/${src} ${PERLASM_STYLE} ${PERLASM_FLAGS} ${ARGN} > ${dest}
    DEPENDS
    ${src}
    ${PROJECT_SOURCE_DIR}/crypto/perlasm/x86_64-xlate.pl
    ${PROJECT_SOURCE_DIR}/crypto/perlasm/x86asm.pl
    ${PROJECT_SOURCE_DIR}/crypto/perlasm/x86gas.pl
    ${PROJECT_SOURCE_DIR}/crypto/perlasm/x86masm.pl
    ${PROJECT_SOURCE_DIR}/crypto/perlasm/x86nasm.pl
    WORKING_DIRECTORY .
  )
endfunction()

if (${ARCH} STREQUAL "x86_64")
  set(
    CRYPTO_ARCH_SOURCES

    cpu-x86_64-asm.${ASM_EXT}
    cpu-intel.c
  )
endif()

if (${ARCH} STREQUAL "x86")
  set(
    CRYPTO_ARCH_SOURCES

    cpu-x86-asm.${ASM_EXT}
    cpu-intel.c
  )
endif()

if (${ARCH} STREQUAL "arm")
  set(
    CRYPTO_ARCH_SOURCES

    cpu-arm.c
    cpu-arm-asm.S
  )
endif()

if (${ARCH} STREQUAL "aarch64")
  set(
    CRYPTO_ARCH_SOURCES

    cpu-arm.c
  )
endif()

# Level 0.1 - depends on nothing outside this set.
add_subdirectory(stack)
add_subdirectory(lhash)
add_subdirectory(err)
add_subdirectory(buf)
add_subdirectory(base64)
add_subdirectory(bytestring)

# Level 0.2 - depends on nothing but itself
add_subdirectory(sha)
add_subdirectory(md4)
add_subdirectory(md5)
add_subdirectory(modes)
add_subdirectory(aes)
add_subdirectory(des)
add_subdirectory(rc4)
add_subdirectory(conf)
add_subdirectory(chacha)
add_subdirectory(poly1305)

# Level 1, depends only on 0.*
add_subdirectory(digest)
add_subdirectory(cipher)
add_subdirectory(rand)
add_subdirectory(bio)
add_subdirectory(bn)
add_subdirectory(obj)
add_subdirectory(asn1)

# Level 2
add_subdirectory(engine)
add_subdirectory(dh)
add_subdirectory(dsa)
add_subdirectory(rsa)
add_subdirectory(ec)
add_subdirectory(ecdh)
add_subdirectory(ecdsa)
add_subdirectory(hmac)

# Level 3
add_subdirectory(evp)
add_subdirectory(hkdf)
add_subdirectory(pem)
add_subdirectory(x509)
add_subdirectory(x509v3)

# Level 4
add_subdirectory(pkcs8)

add_library(
  crypto

  crypto.c
  mem.c
  thread.c
  ex_data.c
  ex_data_impl.c
  time_support.c
  directory_posix.c
  directory_win.c

  ${CRYPTO_ARCH_SOURCES}

  $<TARGET_OBJECTS:stack>
  $<TARGET_OBJECTS:lhash>
  $<TARGET_OBJECTS:err>
  $<TARGET_OBJECTS:base64>
  $<TARGET_OBJECTS:bytestring>
  $<TARGET_OBJECTS:sha>
  $<TARGET_OBJECTS:md4>
  $<TARGET_OBJECTS:md5>
  $<TARGET_OBJECTS:digest>
  $<TARGET_OBJECTS:cipher>
  $<TARGET_OBJECTS:modes>
  $<TARGET_OBJECTS:aes>
  $<TARGET_OBJECTS:des>
  $<TARGET_OBJECTS:rc4>
  $<TARGET_OBJECTS:conf>
  $<TARGET_OBJECTS:chacha>
  $<TARGET_OBJECTS:poly1305>
  $<TARGET_OBJECTS:buf>
  $<TARGET_OBJECTS:bn>
  $<TARGET_OBJECTS:bio>
  $<TARGET_OBJECTS:rand>
  $<TARGET_OBJECTS:obj>
  $<TARGET_OBJECTS:asn1>
  $<TARGET_OBJECTS:engine>
  $<TARGET_OBJECTS:dh>
  $<TARGET_OBJECTS:dsa>
  $<TARGET_OBJECTS:rsa>
  $<TARGET_OBJECTS:ec>
  $<TARGET_OBJECTS:ecdh>
  $<TARGET_OBJECTS:ecdsa>
  $<TARGET_OBJECTS:hmac>
  $<TARGET_OBJECTS:evp>
  $<TARGET_OBJECTS:hkdf>
  $<TARGET_OBJECTS:pem>
  $<TARGET_OBJECTS:x509>
  $<TARGET_OBJECTS:x509v3>
  $<TARGET_OBJECTS:pkcs8>
)

add_executable(
  constant_time_test

  constant_time_test.c
)

target_link_libraries(constant_time_test crypto)

perlasm(cpu-x86_64-asm.${ASM_EXT} cpu-x86_64-asm.pl)
perlasm(cpu-x86-asm.${ASM_EXT} cpu-x86-asm.pl)