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[crypto] Add ECB block cipher mode (for debug and self-tests only)

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2015-07-27 02:48:49 +01:00
parent 1a30c20daf
commit 69891db8e2
4 changed files with 142 additions and 1 deletions
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7
src/crypto/axtls_aes.c
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@@ -24,6 +24,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
#include <assert.h>
#include <byteswap.h>
#include <ipxe/crypto.h>
#include <ipxe/ecb.h>
#include <ipxe/cbc.h>
#include <ipxe/aes.h>
#include "crypto/axtls/crypto.h"
@@ -155,6 +156,10 @@ struct cipher_algorithm aes_algorithm = {
.decrypt = aes_decrypt,
};
/* AES with cipher-block chaining */
/* AES in Electronic Codebook mode */
ECB_CIPHER ( aes_ecb, aes_ecb_algorithm,
aes_algorithm, struct aes_context, AES_BLOCKSIZE );
/* AES in Cipher Block Chaining mode */
CBC_CIPHER ( aes_cbc, aes_cbc_algorithm,
aes_algorithm, struct aes_context, AES_BLOCKSIZE );

80
src/crypto/ecb.c Normal file
View File

@@ -0,0 +1,80 @@
/*
* Copyright (C) 2009 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
* You can also choose to distribute this program under the terms of
* the Unmodified Binary Distribution Licence (as given in the file
* COPYING.UBDL), provided that you have satisfied its requirements.
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <assert.h>
#include <ipxe/crypto.h>
#include <ipxe/ecb.h>
/** @file
*
* Electronic codebook (ECB)
*
*/
/**
* Encrypt data
*
* @v ctx Context
* @v src Data to encrypt
* @v dst Buffer for encrypted data
* @v len Length of data
* @v raw_cipher Underlying cipher algorithm
*/
void ecb_encrypt ( void *ctx, const void *src, void *dst, size_t len,
struct cipher_algorithm *raw_cipher ) {
size_t blocksize = raw_cipher->blocksize;
assert ( ( len % blocksize ) == 0 );
while ( len ) {
cipher_encrypt ( raw_cipher, ctx, src, dst, blocksize );
dst += blocksize;
src += blocksize;
len -= blocksize;
}
}
/**
* Decrypt data
*
* @v ctx Context
* @v src Data to decrypt
* @v dst Buffer for decrypted data
* @v len Length of data
* @v raw_cipher Underlying cipher algorithm
*/
void ecb_decrypt ( void *ctx, const void *src, void *dst, size_t len,
struct cipher_algorithm *raw_cipher ) {
size_t blocksize = raw_cipher->blocksize;
assert ( ( len % blocksize ) == 0 );
while ( len ) {
cipher_decrypt ( raw_cipher, ctx, src, dst, blocksize );
dst += blocksize;
src += blocksize;
len -= blocksize;
}
}