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[crypto] Replace AES implementation

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Replace the AES implementation from AXTLS with a dedicated iPXE
implementation which is slightly smaller and around 1000% faster.
This implementation has been verified using the existing self-tests
based on the NIST AES test vectors.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2015-07-25 00:16:32 +01:00
parent cbb07f0ef7
commit 09824eca31
5 changed files with 836 additions and 635 deletions
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43
src/include/ipxe/aes.h
View File

@@ -1,30 +1,49 @@
#ifndef _IPXE_AES_H
#define _IPXE_AES_H
FILE_LICENCE ( GPL2_OR_LATER );
/** @file
*
* AES algorithm
*
*/
struct cipher_algorithm;
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
/** Basic AES blocksize */
#include <ipxe/crypto.h>
/** AES blocksize */
#define AES_BLOCKSIZE 16
#include "crypto/axtls/crypto.h"
/** Maximum number of AES rounds */
#define AES_MAX_ROUNDS 15
/** AES matrix */
union aes_matrix {
/** Viewed as an array of bytes */
uint8_t byte[16];
/** Viewed as an array of four-byte columns */
uint32_t column[4];
} __attribute__ (( packed ));
/** AES round keys */
struct aes_round_keys {
/** Round keys */
union aes_matrix key[AES_MAX_ROUNDS];
};
/** AES context */
struct aes_context {
/** AES context for AXTLS */
AES_CTX axtls_ctx;
/** Cipher is being used for decrypting */
int decrypting;
/** Encryption keys */
struct aes_round_keys encrypt;
/** Decryption keys */
struct aes_round_keys decrypt;
/** Number of rounds */
unsigned int rounds;
};
/** AES context size */
#define AES_CTX_SIZE sizeof ( struct aes_context )
/* AXTLS functions */
extern void axtls_aes_encrypt ( const AES_CTX *ctx, uint32_t *data );
extern void axtls_aes_decrypt ( const AES_CTX *ctx, uint32_t *data );
extern struct cipher_algorithm aes_algorithm;
extern struct cipher_algorithm aes_ecb_algorithm;
extern struct cipher_algorithm aes_cbc_algorithm;

2
src/include/ipxe/errfile.h
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@@ -264,7 +264,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#define ERRFILE_imgmgmt ( ERRFILE_OTHER | 0x00050000 )
#define ERRFILE_pxe_tftp ( ERRFILE_OTHER | 0x00060000 )
#define ERRFILE_pxe_udp ( ERRFILE_OTHER | 0x00070000 )
#define ERRFILE_axtls_aes ( ERRFILE_OTHER | 0x00080000 )
#define ERRFILE_aes ( ERRFILE_OTHER | 0x00080000 )
#define ERRFILE_cipher ( ERRFILE_OTHER | 0x00090000 )
#define ERRFILE_image_cmd ( ERRFILE_OTHER | 0x000a0000 )
#define ERRFILE_uri_test ( ERRFILE_OTHER | 0x000b0000 )