D3FC0N 30 release: Obj callbacks, firewalling, symbols w/ internet, and more

Co-authored-by: Maxime Meignan <maxime.meignan@wavestone.com>

EDRSandblast/Utils/StringUtils.c

@@ -0,0 +1,71 @@
+/*
+
+--- Utility function to generate a random string.
+
+*/
+
+#include "StringUtils.h"
+
+//BOOL isFullPath(IN TCHAR* filename) {
+//    char c;
+//
+//    if (filename[0] == filename[1] && filename[1] == TEXT('\\')) {
+//        return TRUE;
+//    }
+//
+//    c = filename[0] | 0x20;
+//    if (c < 97 || c > 122) {
+//        return FALSE;
+//    }
+//
+//    c = filename[1];
+//    if (c != ':') {
+//        return FALSE;
+//    }
+//
+//    c = filename[2];
+//    if (c != '\\') {
+//        return FALSE;
+//    }
+//
+//    return TRUE;
+//}
+
+VOID getUnicodeStringFromTCHAR(OUT PUNICODE_STRING unicodeString, IN WCHAR* wcharString) {
+    unicodeString->Buffer = wcharString;
+    unicodeString->Length = (WORD)_tcslen(unicodeString->Buffer) * sizeof(WCHAR);
+    unicodeString->MaximumLength = unicodeString->Length + sizeof(WCHAR);
+}
+
+BOOL srandDone = FALSE;
+
+/*
+* Generates a "length"-long random alphanumeric string
+* Assumes the allocation is big enough to receive "length" chararcters (so is at least "length + 1" long)
+*/
+TCHAR* generateRandomString(TCHAR* str, size_t length) {
+    if (!srandDone) {
+        srand((unsigned int)time(0));
+        srandDone = TRUE;
+    }
+
+    const char charset[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ123456789";
+    if (length) {
+        for (size_t n = 0; n < length; n++) {
+            int key = rand() % (int)(sizeof charset - 1);
+            str[n] = charset[key];
+        }
+        str[length] = '\0';
+    }
+    return str;
+}
+
+
+TCHAR* allocAndGenerateRandomString(size_t length) {
+    LPTSTR str = calloc(length + 1, sizeof(TCHAR));
+    if (str == NULL) {
+        return NULL;
+    }
+    generateRandomString(str, length);
+    return str;
+}