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| #include <stdio.h>
void dealboxdec(unsigned char* Src, unsigned char* box, int len) { unsigned _int16 v11; for (int k = 0; k < len; k += 4) { v11 = Src[k + 3]; Src[k + 3] = (Src[k + 3] << 3) | (Src[k + 0] >> 5); Src[k + 0] = (Src[k + 0] << 3) | (Src[k + 1] >> 5); Src[k + 1] = (Src[k + 1] << 3) | (Src[k + 2] >> 5); Src[k + 2] = (Src[k + 2] << 3) | (v11 >> 5); }
for (int j = 0; j < 44; ++j) { for (int i = 0; i < 256; i++) { if (box[i] == Src[j]) { Src[j] = i; break; } } } }
void dec1(char *key,unsigned char *box, unsigned char *Src) { int i = 0; do { box[i] = i; ++i; } while (i < 256); }
void dec2(unsigned char* box) { int v21,v22,v17,v18,v16; char* v23; unsigned __int64 result; unsigned char v31[256] = { 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, 0x65, 0x61, 0x73, 0x79, 0x5F, 0x47, 0x55, 0x49, }; v21 = 0; v16 = 256; v17 = 0; do { v22 = *((unsigned __int8*)box + v21); v17 = (v22 + v31[v21] + v17) % 256; v23 = (char*)box + v17; result = (unsigned __int8)*v23; box[v21++] = result; *v23 = v22; --v16; } while (v16); }
void dec3(unsigned char* box,unsigned char* Src) { int v25,v6,v27; v25 = 0; int len = 44; v6 = 0;
for (int m = 0; m < len; ++m) { v6 = (v6 + 1) % 256; v27 = *((unsigned __int8*)box + v6); v25 = (v27 + v25) % 256; box[v6] = box[v25]; box[v25] = v27; Src[m] ^= box[(unsigned _int8)(v27 + box[v6])]; } }
void print(unsigned char* data) { for (int i = 0; i < 44; i++) { printf("%c",data[i]); } } unsigned char Src[256]; char out[256] = {-33,-57,77,20,-63,-20,8,-28,95,63,3,-76,-112,74,-71,-113,-113,-6,113,67,-57,-15,-99,-35,79,-64,18,68,92,-99,-120,54,45,22,29,-19,-68,-17,-69,91,-97,119,-21,88 }; char key[] = "easy_GUI";
int main() {
unsigned char box0[256]; unsigned char box[256] = { 0x31, 0x74, 0x54, 0x20, 0x03, 0x53, 0x78, 0x70, 0x3A, 0x35, 0x65, 0x42, 0x04, 0x6B, 0x1F, 0x43, 0x06, 0x37, 0x00, 0x76, 0x21, 0x08, 0x0B, 0x13, 0x52, 0x4B, 0x2F, 0x1A, 0x59, 0x2C, 0x56, 0x51, 0x7F, 0x3B, 0x0E, 0x05, 0x26, 0x15, 0x25, 0x63, 0x64, 0x7A, 0x3C, 0x29, 0x41, 0x2A, 0x12, 0x17, 0x2E, 0x39, 0x57, 0x3D, 0x66, 0x33, 0x44, 0x6C, 0x6F, 0x47, 0x16, 0x71, 0x5F, 0x1C, 0x14, 0x5A, 0x0C, 0x4F, 0x01, 0x30, 0x1B, 0x68, 0x0F, 0x62, 0x3F, 0x18, 0x69, 0x6D, 0x7E, 0x5D, 0x6A, 0x28, 0x22, 0x5B, 0x55, 0x72, 0x09, 0x5E, 0x02, 0x3E, 0x50, 0x7B, 0x46, 0x45, 0x38, 0x10, 0x48, 0x79, 0x60, 0x36, 0x61, 0x6E, 0x2D, 0x49, 0x7C, 0x2B, 0x34, 0x27, 0x11, 0x7D, 0x0D, 0x0A, 0x77, 0x73, 0x58, 0x5C, 0x4C, 0x32, 0x4D, 0x1E, 0x24, 0x40, 0x67, 0x4A, 0x4E, 0x1D, 0x07, 0x75, 0x19, 0x23 }; int len = 44; for (int i = 0; i < 44; ++i) { Src[i] = out[i]; } dec1(key, box0, Src); dec2(box0); dec3(box0, Src); dealboxdec(Src, box, len); print((unsigned char*)Src); return 0; }
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