1 files changed, 97 insertions, 0 deletions
diff --git a/include/uboot_aes.h b/include/uboot_aes.h
new file mode 100644
index 0000000..2fda384
--- /dev/null
+++ b/include/uboot_aes.h
@@ -0,0 +1,97 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ * (C) Copyright 2010 - 2011 NVIDIA Corporation <www.nvidia.com>
+ */
+
+#ifndef _AES_REF_H_
+#define _AES_REF_H_
+
+#ifdef USE_HOSTCC
+/* Define compat stuff for use in fw_* tools. */
+typedef unsigned char u8;
+typedef unsigned int u32;
+#define debug(...) do {} while (0)
+#endif
+
+/*
+ * AES encryption library, with small code size, supporting only 128-bit AES
+ *
+ * AES is a stream cipher which works a block at a time, with each block
+ * in this case being AES_KEY_LENGTH bytes.
+ */
+
+enum {
+	AES_STATECOLS	= 4,	/* columns in the state & expanded key */
+	AES_KEYCOLS	= 4,	/* columns in a key */
+	AES_ROUNDS	= 10,	/* rounds in encryption */
+
+	AES_KEY_LENGTH	= 128 / 8,
+	AES_EXPAND_KEY_LENGTH	= 4 * AES_STATECOLS * (AES_ROUNDS + 1),
+};
+
+/**
+ * aes_expand_key() - Expand the AES key
+ *
+ * Expand a key into a key schedule, which is then used for the other
+ * operations.
+ *
+ * @key		Key, of length AES_KEY_LENGTH bytes
+ * @expkey	Buffer to place expanded key, AES_EXPAND_KEY_LENGTH
+ */
+void aes_expand_key(u8 *key, u8 *expkey);
+
+/**
+ * aes_encrypt() - Encrypt single block of data with AES 128
+ *
+ * @in		Input data
+ * @expkey	Expanded key to use for encryption (from aes_expand_key())
+ * @out		Output data
+ */
+void aes_encrypt(u8 *in, u8 *expkey, u8 *out);
+
+/**
+ * aes_decrypt() - Decrypt single block of data with AES 128
+ *
+ * @in		Input data
+ * @expkey	Expanded key to use for decryption (from aes_expand_key())
+ * @out		Output data
+ */
+void aes_decrypt(u8 *in, u8 *expkey, u8 *out);
+
+/**
+ * Apply chain data to the destination using EOR
+ *
+ * Each array is of length AES_KEY_LENGTH.
+ *
+ * @cbc_chain_data	Chain data
+ * @src			Source data
+ * @dst			Destination data, which is modified here
+ */
+void aes_apply_cbc_chain_data(u8 *cbc_chain_data, u8 *src, u8 *dst);
+
+/**
+ * aes_cbc_encrypt_blocks() - Encrypt multiple blocks of data with AES CBC.
+ *
+ * @key_exp		Expanded key to use
+ * @iv			Initialization vector
+ * @src			Source data to encrypt
+ * @dst			Destination buffer
+ * @num_aes_blocks	Number of AES blocks to encrypt
+ */
+void aes_cbc_encrypt_blocks(u8 *key_exp, u8 *iv, u8 *src, u8 *dst,
+			    u32 num_aes_blocks);
+
+/**
+ * Decrypt multiple blocks of data with AES CBC.
+ *
+ * @key_exp		Expanded key to use
+ * @iv			Initialization vector
+ * @src			Source data to decrypt
+ * @dst			Destination buffer
+ * @num_aes_blocks	Number of AES blocks to decrypt
+ */
+void aes_cbc_decrypt_blocks(u8 *key_exp, u8 *iv, u8 *src, u8 *dst,
+			    u32 num_aes_blocks);
+
+#endif /* _AES_REF_H_ */