Reconstruction of des.exe/undes.exe

2026-09-09 23:28:46 +02:00
parent b90136f137
commit 5aa37bf374
64 changed files with 13344 additions and 2 deletions
@@ -0,0 +1,102 @@
+cmake_minimum_required(VERSION 3.16)
+
+project(des_undes VERSION 1.1.0 LANGUAGES C)
+
+set(CMAKE_C_STANDARD 99)
+set(CMAKE_C_STANDARD_REQUIRED ON)
+set(CMAKE_C_EXTENSIONS ON)
+
+set(CRYPTLIB_DIR "${CMAKE_CURRENT_SOURCE_DIR}/third_party/cryptlib-0.99")
+
+# CRYPTLIB 0.99 registers all algorithms in crypt.c at startup, so all of the
+# original algorithm backends must be linked even though DES/UNDES itself uses
+# only CRYPT_ALGO_3DES + CRYPT_MODE_CBC.
+add_library(cryptlib099 STATIC
+    ${CRYPTLIB_DIR}/crypt.c
+    ${CRYPTLIB_DIR}/lib_3des.c
+    ${CRYPTLIB_DIR}/lib_des.c
+    ${CRYPTLIB_DIR}/lib_idea.c
+    ${CRYPTLIB_DIR}/lib_mdc.c
+    ${CRYPTLIB_DIR}/lib_null.c
+    ${CRYPTLIB_DIR}/lib_rc4.c
+    ${CRYPTLIB_DIR}/lib_safr.c
+    ${CRYPTLIB_DIR}/idea/idea.c
+    ${CRYPTLIB_DIR}/libdes/3ecb_enc.c
+    ${CRYPTLIB_DIR}/libdes/ecb_enc.c
+    ${CRYPTLIB_DIR}/libdes/pcbc_enc.c
+    ${CRYPTLIB_DIR}/libdes/set_key.c
+    ${CRYPTLIB_DIR}/rc4/rc4.c
+    ${CRYPTLIB_DIR}/safer/safer.c
+    ${CRYPTLIB_DIR}/mdc/shs.c
+)
+
+target_include_directories(cryptlib099 PUBLIC
+    ${CRYPTLIB_DIR}
+)
+
+
+# The original makefile used __UNIX__ for Unix builds.
+if(UNIX)
+    target_compile_definitions(cryptlib099 PRIVATE __UNIX__)
+endif()
+
+add_library(des_common STATIC des_common.c)
+target_include_directories(des_common PUBLIC
+    ${CMAKE_CURRENT_SOURCE_DIR}
+    ${CRYPTLIB_DIR}
+)
+target_link_libraries(des_common PUBLIC cryptlib099)
+
+add_executable(des des.c)
+add_executable(undes undes.c)
+
+target_link_libraries(des PRIVATE des_common)
+target_link_libraries(undes PRIVATE des_common)
+
+# des.c and undes.c deliberately retain the original DOS-style <io.h>, read()
+# and fileno() calls.  POSIX systems have these declarations in <unistd.h>, so
+# provide a tiny generated compatibility header without changing the recovered
+# source files.
+if(UNIX)
+    set(COMPAT_DIR "${CMAKE_CURRENT_BINARY_DIR}/compat")
+    file(MAKE_DIRECTORY "${COMPAT_DIR}")
+    file(WRITE "${COMPAT_DIR}/io.h" "#ifndef DES_COMPAT_IO_H\n#define DES_COMPAT_IO_H\n#include <unistd.h>\n#endif\n")
+    target_include_directories(des PRIVATE "${COMPAT_DIR}")
+    target_include_directories(undes PRIVATE "${COMPAT_DIR}")
+endif()
+
+# Modern Microsoft C uses underscored names for these POSIX-compatible calls.
+#if(MSVC)
+#    target_compile_definitions(des PRIVATE
+#        _CRT_SECURE_NO_WARNINGS
+#        fileno=_fileno
+#        read=_read
+#    )
+#    target_compile_definitions(undes PRIVATE
+#        _CRT_SECURE_NO_WARNINGS
+#        fileno=_fileno
+#        read=_read
+#    )
+#    target_compile_definitions(cryptlib099 PRIVATE __WINDOWS__ _CRT_SECURE_NO_WARNINGS)
+#endif()
+
+if(MSVC)
+    target_compile_definitions(cryptlib099 PRIVATE
+        _CRT_SECURE_NO_WARNINGS
+    )
+
+    target_compile_definitions(des PRIVATE
+        _CRT_SECURE_NO_WARNINGS
+        fileno=_fileno
+        read=_read
+    )
+
+    target_compile_definitions(undes PRIVATE
+        _CRT_SECURE_NO_WARNINGS
+        fileno=_fileno
+        read=_read
+    )
+endif()
+
+
+install(TARGETS des undes RUNTIME DESTINATION bin)