made wildcard validation more robust

certexample.c

@@ -36,6 +36,11 @@ int validate_CN_and_SAN(const char *url, X509 *cert);
 int validate_not_before(X509 *cert);
 int validate_not_after(X509 *cert);
 int validate_certificate(const char *url, X509 *cert);
+int find_first_instanceof(const char *str, char delim);
+char *str_slice_to_end(const char *str, int begin);
+
+
+
 
 int main(int argc, char **argv){
     int LINE_BUFFER=100;
@@ -122,6 +127,7 @@ int main(int argc, char **argv){
     }
     exit(0);
 }
+
 char* get_basic_constraints(X509 *cert){
 
     X509_EXTENSION *ex = X509_get_ext(cert, X509_get_ext_by_NID(cert, NID_basic_constraints, -1));
@@ -372,17 +378,29 @@ int validate_basic_constraints(char* basic_constraints){
 }
 
 int validate_wildcard_string(const char *hostname, char*hostname_with_wildcard){
-    char **hostname_with_wildcard_split = str_split(hostname_with_wildcard, '.');
 
-    char **hostname_split = str_split(hostname, '.');
 
-    const char *hostname_with_wildcard_right = hostname_with_wildcard_split[1];
-    const char *hostname_split_right = hostname_split[1];
+    char *hostname_with_wildcard_sliced = str_slice_to_end(hostname_with_wildcard, (find_first_instanceof(hostname_with_wildcard, '.')));
+    char *hostname_sliced = str_slice_to_end(hostname, (find_first_instanceof(hostname, '.')));
+
+
+
+
+
+
+
+    // char **hostname_with_wildcard_split = str_split(hostname_with_wildcard, '.');
+
+    // char **hostname_split = str_split(hostname, '.');
+
+    // const char *hostname_with_wildcard_right = hostname_with_wildcard_split[1];
+    // const char *hostname_split_right = hostname_split[1];
 
-    if(strcasecmp(hostname_split_right, hostname_with_wildcard_right)==0){
-        printf("\t\tWILDCARD FUNCTION\t\t%s == %s\n", hostname_split_right, hostname_with_wildcard_right);
+    if(strcasecmp(hostname_with_wildcard_sliced, hostname_sliced)==0){
+        printf("\t\tWILDCARD FUNCTION\t\t%s == %s\n", hostname_with_wildcard_sliced, hostname_sliced);
         return 1;
     }
+
     return 0;
 }
 int validate_key_length(int length){
@@ -449,3 +467,24 @@ int validate_certificate(const char *url, X509 *cert){
         return 0;
     }
 }
+
+int find_first_instanceof(const char *str, char delim){
+    int i;
+    for (i=0;i<=strlen(str);i++){
+        if(str[i]==delim){
+
+          return i;
+        }
+    }
+    return -1;
+}
+
+
+char *str_slice_to_end(const char *str, int begin){
+  char *tmp = (char *)str;
+
+  tmp = (tmp+=begin+1);
+
+  printf("\tSLICE: %s\n",tmp);
+  return tmp;
+}