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#include <stdio.h> #include <stdlib.h> #include <ctype.h> #include <string.h> typedef enum {false, true} bool; #define KEY_LIMIT 0xFFFFFFFF #define DATA_LEN 9 int main() { char cdata[] = {0x61, 0xFA, 0x1E, 0x51, 0x7C, 0x94, 0x24, 0xD0, 0xD7}; char ddata[DATA_LEN] = {0}; bool invalidChars = false; for(int keyValue = 0; keyValue < KEY_LIMIT; keyValue++) { for(int wordIndex = 0; wordIndex < DATA_LEN; wordIndex++) { ddata[wordIndex] = cdata[wordIndex] ^ keyValue; if(!isalnum(ddata[wordIndex]) && !isspace(ddata[wordIndex])) { invalidChars = true; break; } } if(!invalidChars) { printf("Data: %s - Key: 0x%X\n", ddata, keyValue); } memset(ddata, DATA_LEN, 0); invalidChars = false; } }
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