mirror of
https://github.com/tmpest127/enc_pic_str
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tmpest
68 lines
3.0 KiB
C
68 lines
3.0 KiB
C
#ifndef PIC_STR_H
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#define PIC_STR_H
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#ifdef _MSC_VER
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#error "pic_str requires GNU extensions (statement expressions). Please use Clang or MinGW on Windows instead of MSVC."
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#endif
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#include <stdint.h>
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#include <wchar.h>
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/*
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* pic_str() - Position Independent Code String Obfuscator
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*
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* SAFE USAGE CONTEXTS (Immediate Consumption):
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* The deobfuscated string must be consumed by a function or expression
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* before the statement ends.
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* - Function arguments: printf(pic_str("Hello %s"), name);
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* - Windows API calls: MessageBoxW(NULL, pic_str(L"Text"), pic_str(L"Title"), 0);
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* - Comparisons: if (strcmp(input, pic_str("password")) == 0)
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* - Conditionals: if (pic_str("is_enabled")[0] == '1')
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*
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* UNSAFE USAGE CONTEXTS (Leads to dangling pointers or memory corruption):
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* Do NOT store the pointer returned by this macro for use in later statements.
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* - Pointer assignments: const char *msg = pic_str("test");
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* (The pointer 'msg' is dangling and points to invalid memory on the next line)
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* - Return values: return pic_str("error");
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* (Returns an address to a local stack frame that is destroyed upon return)
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* - Struct member initialization: s.msg = pic_str("data");
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* (The member points to memory that will be overwritten by the next function call)
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* - Array initialization: const char *arr[] = {pic_str("a"), pic_str("b")};
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* (The array elements become invalid pointers as soon as the line completes)
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*
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* INVALID COMPILE-TIME CONTEXTS:
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* - Static/global initialization: static const char *msg = pic_str("x");
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* - Compile-time constants: #if pic_str("x")
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* - String literal concatenation: pic_str("hello") "world"
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*
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* SUPPORTED STRING TYPES:
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* - Regular strings: pic_str("hello") -> const char*
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* - Wide strings (Windows): pic_str(L"hello") -> const wchar_t*
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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// Declare functions that return const char* - this provides type checking
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// and autocomplete, and will cause errors for invalid usage (like initializing
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// fixed-size char arrays, static initialization, etc.)
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static inline const char *pic_str_impl(const char *s) { return s; }
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static inline const wchar_t *pic_str_impl_w(const wchar_t *s) { return s; }
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// Use _Generic to dispatch to the right function based on string type
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// This handles char* (regular strings) and wchar_t* (Windows wide strings)
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#define pic_str(x) \
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_Generic((x), \
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char *: pic_str_impl, \
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const char *: pic_str_impl, \
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wchar_t *: pic_str_impl_w, \
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const wchar_t *: pic_str_impl_w)(x)
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#ifdef __cplusplus
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}
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#endif
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#endif // PIC_STR_H
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