X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=include%2Fuboot_aes.h;h=d2583bed9920ad57c01ef1e34b008e5c92282be5;hb=64cfeda8ae2e95751c5d2dfa4dc4a906478ae2f6;hp=b651bca1c95c532dacf43128852ba80fbd541204;hpb=ab21ecef7a38dd211fe6db35c6e60800445eb6a2;p=platform%2Fkernel%2Fu-boot.git

diff --git a/include/uboot_aes.h b/include/uboot_aes.h
index b651bca..d2583be 100644
--- a/include/uboot_aes.h
+++ b/include/uboot_aes.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (c) 2011 The Chromium OS Authors.
  * (C) Copyright 2010 - 2011 NVIDIA Corporation <www.nvidia.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef _AES_REF_H_
@@ -19,16 +18,24 @@ typedef unsigned int u32;
  * 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.
+ * in this case being AES_BLOCK_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),
+	AES128_KEYCOLS	= 4,	/* columns in a key for aes128 */
+	AES192_KEYCOLS	= 6,	/* columns in a key for aes128 */
+	AES256_KEYCOLS	= 8,	/* columns in a key for aes128 */
+	AES128_ROUNDS	= 10,	/* rounds in encryption for aes128 */
+	AES192_ROUNDS	= 12,	/* rounds in encryption for aes192 */
+	AES256_ROUNDS	= 14,	/* rounds in encryption for aes256 */
+	AES128_KEY_LENGTH	= 128 / 8,
+	AES192_KEY_LENGTH	= 192 / 8,
+	AES256_KEY_LENGTH	= 256 / 8,
+	AES128_EXPAND_KEY_LENGTH = 4 * AES_STATECOLS * (AES128_ROUNDS + 1),
+	AES192_EXPAND_KEY_LENGTH = 4 * AES_STATECOLS * (AES192_ROUNDS + 1),
+	AES256_EXPAND_KEY_LENGTH = 4 * AES_STATECOLS * (AES256_ROUNDS + 1),
+	AES_BLOCK_LENGTH	= 128 / 8,
 };
 
 /**
@@ -37,33 +44,36 @@ enum {
  * Expand a key into a key schedule, which is then used for the other
  * operations.
  *
- * @key		Key, of length AES_KEY_LENGTH bytes
+ * @key		Key
+ * @key_size	Size of the key (in bits)
  * @expkey	Buffer to place expanded key, AES_EXPAND_KEY_LENGTH
  */
-void aes_expand_key(u8 *key, u8 *expkey);
+void aes_expand_key(u8 *key, u32 key_size, u8 *expkey);
 
 /**
  * aes_encrypt() - Encrypt single block of data with AES 128
  *
+ * @key_size	Size of the aes key (in bits)
  * @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);
+void aes_encrypt(u32 key_size, u8 *in, u8 *expkey, u8 *out);
 
 /**
  * aes_decrypt() - Decrypt single block of data with AES 128
  *
+ * @key_size	Size of the aes key (in bits)
  * @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);
+void aes_decrypt(u32 key_size, u8 *in, u8 *expkey, u8 *out);
 
 /**
  * Apply chain data to the destination using EOR
  *
- * Each array is of length AES_KEY_LENGTH.
+ * Each array is of length AES_BLOCK_LENGTH.
  *
  * @cbc_chain_data	Chain data
  * @src			Source data
@@ -74,25 +84,27 @@ 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_size		Size of the aes key (in bits)
  * @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,
+void aes_cbc_encrypt_blocks(u32 key_size, u8 *key_exp, u8 *iv, u8 *src, u8 *dst,
 			    u32 num_aes_blocks);
 
 /**
  * Decrypt multiple blocks of data with AES CBC.
  *
+ * @key_size		Size of the aes key (in bits)
  * @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,
+void aes_cbc_decrypt_blocks(u32 key_size, u8 *key_exp, u8 *iv, u8 *src, u8 *dst,
 			    u32 num_aes_blocks);
 
 #endif /* _AES_REF_H_ */