cmake_minimum_required(VERSION 3.11)

project (Cryptlib C)

set(FIXED_FIXED_SEED OFF CACHE BOOL "Use a non-random fixed seed")

include(CheckCCompilerFlag)
include(TestBigEndian)
find_program(PATCH_BIN patch REQUIRED)
find_program(PERL_BIN perl REQUIRED)
# Really, this is "GNU patch?"
if(CMAKE_SYSTEM_NAME STREQUAL "Linux" OR CMAKE_SYSTEM_NAME STREQUAL "Haiku" OR CMAKE_SYSTEM_NAME STREQUAL "Darwin")
	find_program(DOS2UNIX_BIN dos2unix REQUIRED)
endif()

find_package(Threads)
string(REGEX MATCH "[0-9]+" SYSTEM_VERSION ${CMAKE_SYSTEM_VERSION})
check_c_compiler_flag(-Wpointer-sign HAVE_POINTER_SIGN)
check_c_compiler_flag(-Wswitch HAVE_SWITCH)
check_c_compiler_flag(-fstack-protector HAVE_STACK_PROTECTOR)
check_c_compiler_flag(-fstack-protector-strong HAVE_STACK_PROTECTOR_STRONG)
check_c_compiler_flag(-fstack-clash-protection HAVE_STACK_CLASH_PROTECTION)
check_c_compiler_flag(-fwrapv HAVE_WRAPV)
check_c_compiler_flag(-fno-delete-null-pointer-checks HAVE_NO_DELETE_NULL_POINTER_CHECKS)
check_c_compiler_flag(-fPIC HAVE_BIG_PIC)
check_c_compiler_flag(-fpic HAVE_LITTLE_PIC)
test_big_endian(IS_BIG_ENDIAN)
if(FIXED_FIXED_SEED)
	set(FIXED_SEED "FEEDC0DEBAADF00D")
else()
	string(RANDOM LENGTH 16 ALPHABET "0123456789ABCDEF" FIXED_SEED)
endif()

set(PATCHES
	cl-terminal-params.patch
	cl-ranlib.patch
	cl-vcxproj.patch
	cl-endian.patch
	cl-win32-noasm.patch
	cl-zz-country.patch
	cl-algorithms.patch
	cl-allow-duplicate-ext.patch
	cl-macosx-minver.patch
	cl-posix-me-gently.patch
	cl-PAM-noprompts.patch
	cl-zlib.patch
	cl-Dynamic-linked-static-lib.patch
	cl-SSL-fix.patch
	cl-bigger-maxattribute.patch
	cl-mingw-vcver.patch
	cl-no-odbc.patch
	cl-noasm-defines.patch
	cl-bn-noasm64-fix.patch
	cl-prefer-ECC.patch
	cl-prefer-ECC-harder.patch
	cl-clear-GCM-flag.patch
	cl-use-ssh-ctr.patch
	cl-ssh-list-ctr-modes.patch
	cl-no-tpm.patch
	cl-no-via-aes.patch
	cl-just-use-cc.patch
	cl-no-safe-stack.patch
	cl-allow-pkcs12.patch
	cl-allow-none-auth.patch
	cl-poll-not-select.patch
	cl-good-sockets.patch
	cl-moar-objects.patch
	cl-remove-march.patch
	cl-server-term-support.patch
	cl-add-pubkey-attribute.patch
	cl-allow-ssh-auth-retries.patch
	cl-fix-ssh-channel-close.patch
	cl-vt-lt-2005-always-defined.patch
	cl-no-pie.patch
	cl-win32-lean-and-mean.patch
	cl-thats-not-asm.patch
	cl-make-channels-work.patch
	cl-allow-ssh-2.0-go.patch
	cl-read-timeout-every-time.patch
	cl-pass-after-pubkey.patch
	cl-allow-servercheck-pubkeys.patch
	cl-double-delete-fine-on-close.patch
	cl-handle-unsupported-pubkey.patch
	cl-add-patches-info.patch
	cl-netbsd-hmac-symbol.patch
	cl-netbsd-no-getfsstat.patch
	cl-fix-shell-exec-types.patch
	cl-ssh-eof-half-close.patch
	cl-fix-mb-w-conv-warnings.patch
	cl-ssh-service-type-for-channel.patch
	cl-ssh-sbbs-id-string.patch
	cl-channel-select-both.patch
	cl-allow-none-auth-svr.patch
	cl-mingw64-thread-handles.patch
	cl-mingw64-is-really-new.patch
	cl-lowercase-versionhelpers.patch
	cl-fix-cpuid-order.patch
	cl-fix-cbli-incompatible.patch
	cl-mingw64-unicode-gibble.patch
	cl-haiku-build.patch
	cl-dont-validate-va-list.patch
	cl-musl-socklen_t.patch
	cl-no-musl-backtrace.patch
	cl-fix-constptrptr.patch
	cl-fix-void-ptrs.patch
	cl-intptr-t.patch
	cl-wrong-string-length.patch
	cl-remove-silly-pragmas.patch
	cl-size-doesnt-mean-copied.patch
	cl-add-psk-flag.patch
	cl-winapi-needed.patch
)

set(SOURCE
	bn/bn_asm.c
	bn/bn_exp.c
	bn/bn_exp2.c
	bn/bn_gcd.c
	bn/bn_mul.c
	bn/bn_recp.c
	bn/ec_lib.c
	bn/ecp_mont.c
	bn/ecp_smpl.c
	bn/ec_mult.c
	cert/certrev.c
	cert/certschk.c
	cert/certsign.c
	cert/certval.c
	cert/chain.c
	cert/chk_cert.c
	cert/chk_chain.c
	cert/chk_san.c
	cert/chk_use.c
	cert/comp_cert.c
	cert/comp_curs.c
	cert/comp_del.c
	cert/comp_get.c
	cert/comp_gets.c
	cert/comp_pkiuser.c
	cert/comp_set.c
	cert/dn.c
	cert/dn_rw.c
	cert/dn_rws.c
	cert/dn_string.c
	cert/ext.c
	cert/ext_add.c
	cert/ext_check.c
	cert/ext_copy.c
	cert/ext_def.c
	cert/ext_rd.c
	cert/ext_rdattr.c
	cert/ext_rdstack.c
	cert/ext_wr.c
	cert/imp_check.c
	cert/imp_exp.c
	cert/read.c
	cert/trustmgr.c
	cert/write.c
	cert/write_pre.c
	crypt/aes_modes.c
	crypt/aes_ni.c
	crypt/aescrypt.c
	crypt/aeskey.c
	crypt/aestab.c
	crypt/castecb.c
	crypt/castenc.c
	crypt/castskey.c
	crypt/chacha20.c
	crypt/descbc.c
	crypt/desecb.c
	crypt/desecb3.c
	crypt/desenc.c
	crypt/desskey.c
	crypt/gcm.c
	crypt/gf128mul.c
	crypt/icbc.c
	crypt/iecb.c
	crypt/iskey.c
	crypt/poly1305.c
	crypt/rc2cbc.c
	crypt/rc2ecb.c
	crypt/rc2skey.c
	crypt/rc4enc.c
	crypt/rc4skey.c
	context/ctx_3des.c
	context/ctx_aes.c
	context/ctx_attr.c
	context/ctx_bn.c
	context/ctx_bnmath.c
	context/ctx_bnpkc.c
	context/ctx_bnprime.c
	context/ctx_bnrw.c
	context/ctx_bnsieve.c
	context/ctx_bntest.c
	context/ctx_cast.c
	context/ctx_chacha20.c
	context/ctx_des.c
	context/ctx_dh.c
	context/ctx_dsa.c
	context/ctx_ecdh.c
	context/ctx_ecdsa.c
	context/ctx_elg.c
	context/ctx_encr.c
	context/ctx_generic.c
	context/ctx_hsha.c
	context/ctx_hsha2.c
	context/ctx_idea.c
	context/ctx_md5.c
	context/ctx_misc.c
	context/ctx_poly1305.c
	context/ctx_rc2.c
	context/ctx_rc4.c
	context/ctx_rsa.c
	context/ctx_sha.c
	context/ctx_sha2.c
	context/kg_dlp.c
	context/kg_ecc.c
	context/kg_prime.c
	context/kg_rsa.c
	context/keyload.c
	context/key_id.c
	context/key_rdpriv.c
	context/key_rdpub.c
	context/key_wrpriv.c
	context/key_wrpub.c
	device/dev_attr.c
	device/dev_storage.c
	device/hardware.c
	device/hw_template.c
	device/hw_templalg.c
	device/hw_misc.c
	device/pkcs11.c
	device/pkcs11_init.c
	device/pkcs11_pkc.c
	device/pkcs11_rd.c
	device/pkcs11_wr.c
	device/system.c
	enc_dec/asn1_algoenc.c
	enc_dec/asn1_algoid.c
	enc_dec/asn1_check.c
	enc_dec/asn1_ext.c
	enc_dec/asn1_oid.c
	enc_dec/asn1_rd.c
	enc_dec/asn1_wr.c
	enc_dec/base32.c
	enc_dec/base64.c
	enc_dec/base64_id.c
	enc_dec/misc_rw.c
	enc_dec/pgp_rw.c
	envelope/cms_deenv.c
	envelope/cms_env.c
	envelope/cms_envpre.c
	envelope/decode.c
	envelope/encode.c
	envelope/env_attr.c
	envelope/pgp_deenv.c
	envelope/pgp_env.c
	envelope/res_action.c
	envelope/res_deenv.c
	envelope/res_env.c
	crypt/md5dgst.c
	crypt/sha1dgst.c
	crypt/sha2.c
	io/dns.c
	io/dns_srv.c
	io/eap.c
	io/eap_rd.c
	io/eap_wr.c
	io/file.c
	io/http.c
	io/http_rd.c
	io/http_parse.c
	io/http_wr.c
	io/memory.c
	io/net.c
	io/net_proxy.c
	io/net_trans.c
	io/net_url.c
	io/stream.c
	io/tcp.c
	io/tcp_conn.c
	io/tcp_err.c
	io/tcp_rw.c
	kernel/attr_acl.c
	kernel/certmgt_acl.c
	kernel/init.c
	kernel/int_msg.c
	kernel/key_acl.c
	kernel/mech_acl.c
	kernel/msg_acl.c
	kernel/obj_access.c
	kernel/objects.c
	kernel/sec_mem.c
	kernel/selftest.c
	kernel/semaphore.c
	kernel/sendmsg.c
	kernel/storage.c
	keyset/dbms.c
	keyset/ca_add.c
	keyset/ca_clean.c
	keyset/ca_issue.c
	keyset/ca_misc.c
	keyset/ca_rev.c
	keyset/dbx_misc.c
	keyset/dbx_rd.c
	keyset/dbx_wr.c
	keyset/http_keys.c
	keyset/key_attr.c
	keyset/ldap.c
	keyset/odbc.c
	keyset/pgp.c
	keyset/pgp_rd.c
	keyset/pgp_wr.c
	keyset/pkcs12.c
	keyset/pkcs12_rd.c
	keyset/pkcs12_rdobj.c
	keyset/pkcs12_wr.c
	keyset/pkcs15.c
	keyset/pkcs15_add.c
	keyset/pkcs15_addpub.c
	keyset/pkcs15_addpriv.c
	keyset/pkcs15_attrrd.c
	keyset/pkcs15_attrwr.c
	keyset/pkcs15_get.c
	keyset/pkcs15_getpkc.c
	keyset/pkcs15_rd.c
	keyset/pkcs15_set.c
	keyset/pkcs15_wr.c
	cryptapi.c
	cryptcrt.c
	cryptctx.c
	cryptdev.c
	cryptenv.c
	cryptkey.c
	cryptlib.c
	cryptses.c
	cryptusr.c
	mechs/keyex.c
	mechs/keyex_int.c
	mechs/keyex_rw.c
	mechs/mech_cwrap.c
	mechs/mech_derive.c
	mechs/mech_int.c
	mechs/mech_pkwrap.c
	mechs/mech_privk.c
	mechs/mech_sign.c
	mechs/obj_query.c
	mechs/sign.c
	mechs/sign_cms.c
	mechs/sign_int.c
	mechs/sign_pgp.c
	mechs/sign_rw.c
	mechs/sign_x509.c
	misc/int_api.c
	misc/int_attr.c
	misc/int_debug.c
	misc/int_env.c
	misc/int_err.c
	misc/int_mem.c
	misc/int_string.c
	misc/int_time.c
	bindings/java_jni.c
	misc/os_spec.c
	misc/pgp_misc.c
	random/random.c
	random/rand_x917.c
	misc/user.c
	misc/user_attr.c
	misc/user_config.c
	misc/user_rw.c
	session/certstore.c
	session/cmp.c
	session/cmp_cli.c
	session/cmp_crypt.c
	session/cmp_err.c
	session/cmp_rd.c
	session/cmp_rdmsg.c
	session/cmp_svr.c
	session/cmp_wr.c
	session/cmp_wrmsg.c
	session/ocsp.c
	session/pnppki.c
	session/rtcs.c
	session/scep.c
	session/scep_cli.c
	session/scep_svr.c
	session/scvp.c
	session/scvp_cli.c
	session/scvp_svr.c
	session/scorebrd.c
	session/sess_attr.c
	session/sess_iattr.c
	session/sess_rd.c
	session/sess_wr.c
	session/sess_websock.c
	session/session.c
	session/ssh.c
	session/ssh2.c
	session/ssh2_algo.c
	session/ssh2_authcli.c
	session/ssh2_authsvr.c
	session/ssh2_channel.c
	session/ssh2_cli.c
	session/ssh2_crypt.c
	session/ssh2_id.c
	session/ssh2_msg.c
	session/ssh2_msgcli.c
	session/ssh2_msgsvr.c
	session/ssh2_rd.c
	session/ssh2_svr.c
	session/ssh2_wr.c
	session/tls.c
	session/tls13_crypt.c
	session/tls13_hs.c
	session/tls13_keyex.c
	session/tls_cert.c
	session/tls_cli.c
	session/tls_crypt.c
	session/tls_ext.c
	session/tls_ext_rw.c
	session/tls_hello.c
	session/tls_hscomplete.c
	session/tls_keymgt.c
	session/tls_rd.c
	session/tls_sign.c
	session/tls_suites.c
	session/tls_svr.c
	session/tls_wr.c
	session/tsp.c
	zlib/adler32.c
	zlib/deflate.c
	zlib/inffast.c
	zlib/inflate.c
	zlib/inftrees.c
	zlib/trees.c
	zlib/zutil.c
)

if(WIN32)
	list(APPEND SOURCE random/win32.c)
else()
	list(APPEND SOURCE random/unix.c)
endif()
set(LAST_PATCH "")
# Linux patch -l won't deal with line ending differences. :(
if(DEFINED DOS2UNIX_BIN)
	add_custom_command(OUTPUT ${CMAKE_CURRENT_SOURCE_DIR}/dos2unix.done
		COMMAND ${DOS2UNIX_BIN} ${CMAKE_CURRENT_SOURCE_DIR}/* ${CMAKE_CURRENT_SOURCE_DIR}/*/*
		COMMAND ${CMAKE_COMMAND} -E touch ${CMAKE_CURRENT_SOURCE_DIR}/dos2unix.done
		DEPENDS ${LAST_PATCH})
	set(LAST_PATCH ${CMAKE_CURRENT_SOURCE_DIR}/dos2unix.done)
endif()
foreach(PATCH IN LISTS PATCHES)
	add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${PATCH}.done
		COMMAND ${PATCH_BIN} -l -b -p0 -d ${CMAKE_CURRENT_SOURCE_DIR} -i ${CMAKE_CURRENT_SOURCE_DIR}/${PATCH}
		COMMAND ${CMAKE_COMMAND} -E touch ${CMAKE_CURRENT_BINARY_DIR}/${PATCH}.done
		DEPENDS ${LAST_PATCH})
	set(LAST_PATCH ${CMAKE_CURRENT_BINARY_DIR}/${PATCH}.done)
endforeach()
add_custom_command(OUTPUT ${CMAKE_CURRENT_SOURCE_DIR}/cryptlib.h.updated
	COMMAND ${PERL_BIN} -i.bak ${CMAKE_CURRENT_SOURCE_DIR}/hashpatch.pl ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/cryptlib.h
	COMMAND ${CMAKE_COMMAND} -E touch ${CMAKE_CURRENT_SOURCE_DIR}/cryptlib.h.updated
	DEPENDS ${LAST_PATCH})
set(LAST_PATCH ${CMAKE_CURRENT_SOURCE_DIR}/cryptlib.h.updated)
add_library(cl STATIC EXCLUDE_FROM_ALL ${LAST_PATCH} ${SOURCE})

if(HAVE_POINTER_SIGN)
	target_compile_options(cl PRIVATE -Wno-pointer-sign)
endif()
if(HAVE_SWITCH)
	target_compile_options(cl PRIVATE -Wno-switch)
endif()
if(HAVE_STACK_PROTECTOR_STRONG)
	target_compile_options(cl PRIVATE -fstack-protector-strong)
else()
	if(HAVE_STACK_PROTECTOR)
		target_compile_options(cl PRIVATE -fstack-protector)
	endif()
endif()
if(HAVE_STACK_CLASH_PROTECTION)
	# Apple compilers will accept the flag, but then warn about it doing nothing
	if(NOT APPLE)
		# OpenBSD compilers will accept the flag, but then warn about it doing nothing
		if(NOT CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
			target_compile_options(cl PRIVATE -fstack-clash-protection)
		endif()
	endif()
endif()
if(HAVE_WRAPV)
	target_compile_options(cl PRIVATE -fwrapv)
endif()
if(HAVE_NO_DELETE_NULL_POINTER_CHECKS)
	target_compile_options(cl PRIVATE -fno-delete-null-pointer-checks)
endif()
if(HAVE_BIG_PIC)
	target_compile_options(cl PRIVATE -fPIC)
else()
	if(HAVE_LITTLE_PIC)
		target_compile_options(cl PRIVATE -fpic)
	endif()
endif()
if(WIN32)
	target_compile_definitions(cl PRIVATE __WINDOWS__)
	target_compile_definitions(cl INTERFACE __WINDOWS__)
endif()
if(UNIX)
	target_compile_definitions(cl PRIVATE __UNIX__)
endif()
if(IS_BIG_ENDIAN)
	target_compile_definitions(cl PRIVATE DATA_BIGENDIAN)
else()
	target_compile_definitions(cl PRIVATE DATA_LITTLEENDIAN)
endif()
target_compile_definitions(cl PRIVATE _FORTIFY_SOURCE=2)
target_compile_definitions(cl PRIVATE OSVERSION=${SYSTEM_VERSION})
target_compile_definitions(cl PRIVATE FIXED_SEED=0x${FIXED_SEED})
target_compile_definitions(cl PRIVATE CONFIG_NO_DEVICES)
target_compile_definitions(cl PRIVATE STATIC_LIB)
target_compile_definitions(cl INTERFACE STATIC_LIB)
target_include_directories(cl PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
target_include_directories(cl INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})
target_link_libraries(cl ${CMAKE_THREAD_LIBS_INIT})
if(WIN32)
	target_link_libraries(cl $<$<CONFIG:Debug>:dbghelp>)
endif()
