implemented aes (sort of), might reintroduce libusb?

exploit/checkm8.h

@@ -3,4 +3,12 @@
 
 int exploit_device();
 
+#define AES_ENCRYPT 16
+#define AES_DECRYPT 17
+
+#define AES_GID_KEY 0x2000200
+#define AES_UID_KEY 0x2000201
+
+int aes(unsigned char *source, unsigned char *target, int encrypt, int key);
+
 #endif //IPWNDFU_REWRITE_C_CHECKM8_H

exploit/commands.c

@@ -0,0 +1,69 @@
+#include <string.h>
+
+#include "libusb_helpers.h"
+#include "checkm8.h"
+
+#define EXEC_MAGIC 0x6365786563657865
+#define DONE_MAGIC 0x656e6f64656e6f64
+#define MEMC_MAGIC 0x636d656d636d656d
+#define MEMS_MAGIC 0x736d656d736d656d
+
+int command(unsigned char *request_data, int request_len, unsigned char *response_buf, int response_len)
+{
+    libusb_context *usb_ctx = NULL;
+    struct libusb_device_bundle bundle;
+
+    libusb_init(&usb_ctx);
+    get_test_device(usb_ctx, &bundle);
+
+    unsigned char nullbuf[16];
+    memset(nullbuf, '\0', 16);
+
+    libusb_control_transfer(bundle.handle, 0x21, 1, 0, 0, nullbuf, 16, 5000);
+    libusb_control_transfer(bundle.handle, 0x21, 1, 0, 0, nullbuf, 0, 100);
+    libusb_control_transfer(bundle.handle, 0xA1, 3, 0, 0, nullbuf, 6, 100);
+    libusb_control_transfer(bundle.handle, 0xA1, 3, 0, 0, nullbuf, 6, 100);
+    libusb_control_transfer(bundle.handle, 0x21, 1, 0, 0, request_data, request_len, 5000);
+
+    if(response_len == 0)
+    {
+        libusb_control_transfer(bundle.handle, 0xA1, 2, 0xFFFF, 0, response_buf, 1, 5000);
+        return 0;
+    }
+    else
+    {
+        libusb_control_transfer(bundle.handle, 0xA1, 2, 0xFFFF, 0, response_buf, request_len, 5000);
+        return 0;
+    }
+}
+
+
+int execute(unsigned long *args, int nargs, unsigned char *response_buf, int response_len)
+{
+    unsigned long cmd_buf[nargs + 1];
+    cmd_buf[0] = EXEC_MAGIC;
+    memcpy(&cmd_buf[1], args, 8 * nargs);
+
+    return command((unsigned char *) cmd_buf, 8 * (nargs + 1), response_buf, response_len);
+}
+
+
+int aes(unsigned char *source, unsigned char *target, int encrypt, int key)
+{
+    unsigned long args[10];
+    args[0] = 0x10000C8F4;  // AES crypto command
+    args[1] = encrypt;
+    args[2] = 0x1800b0048;  // cmd_data_address(7)
+    args[3] = 0x1800B0010;  // cmd_data_address(0)
+    args[4] = 128;          // length of the data
+    args[5] = key;
+    args[6] = 0;
+    args[7] = 0;
+    memcpy(&args[8], source, 16);
+
+    unsigned char response[32];
+    int ret = execute(args, 10, response, 32);
+
+    memcpy(target, &response[16], 16);
+    return ret;
+}

exploit/exploit.c

@@ -11,8 +11,6 @@ int complete_stage(int stage_function(struct libusb_device_bundle *bundle))
 
     libusb_context *usb_ctx = NULL;
     struct libusb_device_bundle usb_bundle;
-    struct libusb_device_handle *usb_handle;
-    struct libusb_device_descriptor usb_desc;
 
     libusb_init(&usb_ctx);
     get_test_device(usb_ctx, &usb_bundle);