mkimage: fit: add support to encrypt image with aes

This commit add the support of encrypting image with aes
in mkimage. To enable the ciphering, a node cipher with
a reference to a key and IV (Initialization Vector) must
be added to the its file. Then mkimage add the encrypted
image to the FIT and add the key and IV to the u-boot
device tree.

Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/include/u-boot/aes.h b/include/u-boot/aes.h
new file mode 100644
index 0000000..4fb2cb7
--- /dev/null
+++ b/include/u-boot/aes.h
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (c) 2019, Softathome
+ */
+
+#ifndef _AES_H
+#define _AES_H
+
+#include <errno.h>
+#include <image.h>
+
+#if IMAGE_ENABLE_ENCRYPT
+int image_aes_encrypt(struct image_cipher_info *info,
+		      const unsigned char *data, int size,
+		      unsigned char **cipher, int *cipher_len);
+int image_aes_add_cipher_data(struct image_cipher_info *info, void *keydest);
+#else
+int image_aes_encrypt(struct image_cipher_info *info,
+		      const unsigned char *data, int size,
+		      unsigned char **cipher, int *cipher_len)
+{
+	return -ENXIO;
+}
+
+int image_aes_add_cipher_data(struct image_cipher_info *info, void *keydest)
+{
+	return -ENXIO;
+}
+#endif /* IMAGE_ENABLE_ENCRYPT */
+
+#endif