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f53df7da64
Code submissions have continually suffered from formatting inconsistencies that constantly have to be addressed. Using clang-format simplifies this by making code formatting more consistent, and allows automation of the code formatting so that maintainers can focus more on the code itself instead of code formatting.
40 lines
811 B
C
40 lines
811 B
C
#ifdef _MSC_VER
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#pragma warning(disable : 4152) /* casting func ptr to void */
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#endif
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#include <stdbool.h>
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#include <windows.h>
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#include "obfuscate.h"
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#define LOWER_HALFBYTE(x) ((x)&0xF)
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#define UPPER_HALFBYTE(x) (((x) >> 4) & 0xF)
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static void deobfuscate_str(char *str, uint64_t val)
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{
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uint8_t *dec_val = (uint8_t *)&val;
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int i = 0;
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while (*str != 0) {
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int pos = i / 2;
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bool bottom = (i % 2) == 0;
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uint8_t *ch = (uint8_t *)str;
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uint8_t xor = bottom ? LOWER_HALFBYTE(dec_val[pos])
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: UPPER_HALFBYTE(dec_val[pos]);
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*ch ^= xor;
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if (++i == sizeof(uint64_t) * 2)
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i = 0;
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str++;
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}
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}
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void *get_obfuscated_func(HMODULE module, const char *str, uint64_t val)
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{
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char new_name[128];
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strcpy(new_name, str);
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deobfuscate_str(new_name, val);
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return GetProcAddress(module, new_name);
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}
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