La til halla og fuzztarget filer

fuzz_target.cc

+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include "halla.c"
+
+
+// fuzz_target.cc
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  // Create a c string from fuzzer data (with an additional byte set to '\0')
+  char *str = (char *)malloc(sizeof(char) * size + 1); // Create a c-string of length size + 1
+  memcpy(str, data, size);                             // Copy fuzzer data to string
+  str[size] = '\0';                                    // Set last byte of allocated string to '\0'
+   
+   char *test = checkChar(str);
+    free(test);
+    free(str);
+  return 0;
+}
+
+//clang -g -O1 -fsanitize=fuzzer,address c.c -o c
+//clang -g -fsanitize=fuzzer first-cap.c -o fuzz-first-cap
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+

halla.c

+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+char *checkChar(char str[50]) {
+  int i;
+  char *newstr;
+  newstr = (char *)calloc(200,1);
+   for (i = 0; i < strlen(str); i++) {
+    if (str[i] == '&') {
+      const char *ch = "&amp";
+      strncat(newstr, ch, 4);
+    } else if (str[i] == '<') {
+      const char *ch = "&lt";
+      strncat(newstr, ch, 3);
+    } else if (str[i] == '>') {
+      const char *ch = "&gt";
+      strncat(newstr, ch, 3);
+    } else {
+      const char ch = str[i];
+      strncat(newstr, &ch, 1);
+    }
+  }
+  return newstr;
+}
+
+/*
+int main() {
+  char str[200];
+  printf("Enter the string you want to convert: \n");
+  fgets(str, 200, stdin);
+  char *string = checkChar(str);
+  printf("After replacement:\n%s", string);
+
+  return 0;
+}*/