1 files changed, 58 insertions, 0 deletions
diff --git a/source/tools/loader_decrypt.c b/source/tools/loader_decrypt.c
new file mode 100644
index 0000000..0043e7a
--- /dev/null
+++ b/source/tools/loader_decrypt.c
@@ -0,0 +1,58 @@
+#include "compat.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+#include "utils.h"
+#include "helper.h"
+#include "aes.h"
+#include "xor_strings.h"
+#include "aes_strings_gen.h"
+#include "loader_x86_crypt.h"
+
+
+_AESDATA_(ldrdata, LOADER_SHELLCODE);
+_AESSIZE_(ldrsiz, ldrdata);
+static const size_t real_ldrsiz = LOADER_SHELLCODE_SIZE;
+
+_AESDATA_(ldrdbgdata, LOADER_SHELLCODE_DEBUG);
+_AESSIZE_(ldrdbgsiz, ldrdbgdata);
+static const size_t real_ldrdbgsiz = LOADER_SHELLCODE_DEBUG_SIZE;
+
+
+int main(int argc, char** argv)
+{
+  (void)argc;
+  aes_init();
+
+  size_t pSiz = 0;
+  aes_ctx_t* ctx = aes_alloc_ctx((unsigned char*)LDR_KEY, LDR_KEYSIZ);
+
+  BYTE* ldr = (BYTE*)aes_crypt_s(ctx, (char*)ldrdata, (size_t)ldrsiz, &pSiz, false);
+
+  char* hexout = bintostr((char*)ldr, real_ldrsiz, 1, NULL);
+  printf("%s [DECRYPTED]: %u bytes\n%s\n", argv[0], real_ldrsiz, hexout);
+
+  free(ldr);
+  free(hexout);
+
+  hexout = bintostr((char*)ldrdata, ldrsiz, 1, NULL);
+  printf("%s [ENCRYPTED]: %u bytes\n%s\n", argv[0], ldrsiz, hexout);
+  free(hexout);
+
+  ldr = (BYTE*)aes_crypt_s(ctx, (char*)ldrdbgdata, (size_t)ldrdbgsiz, &pSiz, false);
+
+  hexout = bintostr((char*)ldr, real_ldrdbgsiz, 1, NULL);
+  printf("%s [DECRYPTED]: %u bytes\n%s\n", argv[0], real_ldrdbgsiz, hexout);
+
+  free(ldr);
+  free(hexout);
+
+  hexout = bintostr((char*)ldrdata, ldrdbgsiz, 1, NULL);
+  printf("%s [ENCRYPTED]: %u bytes\n%s\n", argv[0], ldrdbgsiz, hexout);
+  free(hexout);
+
+  aes_free_ctx(ctx);
+  return 0;
+}