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- #include <stdio.h>
- #include <string.h>
- int main(int argc, char *argv[]) {
- int i;
- char buffer[32];
- //char *key1 = "/";
- char *p1, *p2, *p3, *p4, *p5;
- char key2[2], key3[2], key4[2], key5[2];
- // if(argc != 2)
- // return -1;
- for(i = 1; i < argc; i++) {
- memset(argv[i], 0, strlen(argv[i]));
- }
- sprintf(key2, "%c", 0x90); // nop
- sprintf(key3, "%c", 0xeb); // jmp
- sprintf(key4, "%c", 0xcd); // int
- sprintf(key5, "%c", 0xff); // still easy
- //p1 = strstr(argv[0], key1);
- p2 = strstr(argv[0], key2);
- p3 = strstr(argv[0], key3);
- p4 = strstr(argv[0], key4);
- p5 = strstr(argv[0], key5);
- if (p2 != NULL || p3 != NULL || p4 != NULL || p5 != NULL) {
- printf("Access denied.\n");
- return -1;
- }
- else {
- printf("Access granted.\n");
- }
- strcpy(buffer, argv[0]);
- return 0;
- }
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