diff options
Diffstat (limited to 'gpxe/src/crypto/axtls_aes.c')
| -rw-r--r-- | gpxe/src/crypto/axtls_aes.c | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/gpxe/src/crypto/axtls_aes.c b/gpxe/src/crypto/axtls_aes.c deleted file mode 100644 index 8bd37586..00000000 --- a/gpxe/src/crypto/axtls_aes.c +++ /dev/null @@ -1,158 +0,0 @@ -/* - * Copyright (C) 2007 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., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -FILE_LICENCE ( GPL2_OR_LATER ); - -#include <string.h> -#include <errno.h> -#include <byteswap.h> -#include <gpxe/crypto.h> -#include <gpxe/cbc.h> -#include <gpxe/aes.h> -#include "crypto/axtls/crypto.h" - -/** @file - * - * AES algorithm - * - */ - -/** - * Set key - * - * @v ctx Context - * @v key Key - * @v keylen Key length - * @ret rc Return status code - */ -static int aes_setkey ( void *ctx, const void *key, size_t keylen ) { - struct aes_context *aes_ctx = ctx; - AES_MODE mode; - void *iv; - - switch ( keylen ) { - case ( 128 / 8 ): - mode = AES_MODE_128; - break; - case ( 256 / 8 ): - mode = AES_MODE_256; - break; - default: - return -EINVAL; - } - - /* IV is not a relevant concept at this stage; use a dummy - * value that will have no side-effects. - */ - iv = &aes_ctx->axtls_ctx.iv; - - AES_set_key ( &aes_ctx->axtls_ctx, key, iv, mode ); - - aes_ctx->decrypting = 0; - - return 0; -} - -/** - * Set initialisation vector - * - * @v ctx Context - * @v iv Initialisation vector - */ -static void aes_setiv ( void *ctx __unused, const void *iv __unused ) { - /* Nothing to do */ -} - -/** - * Call AXTLS' AES_encrypt() or AES_decrypt() functions - * - * @v axtls_ctx AXTLS AES context - * @v src Data to process - * @v dst Buffer for output - * @v func AXTLS AES function to call - */ -static void aes_call_axtls ( AES_CTX *axtls_ctx, const void *src, void *dst, - void ( * func ) ( const AES_CTX *axtls_ctx, - uint32_t *data ) ){ - const uint32_t *srcl = src; - uint32_t *dstl = dst; - unsigned int i; - - /* AXTLS' AES_encrypt() and AES_decrypt() functions both - * expect to deal with an array of four dwords in host-endian - * order. - */ - for ( i = 0 ; i < 4 ; i++ ) - dstl[i] = ntohl ( srcl[i] ); - func ( axtls_ctx, dstl ); - for ( i = 0 ; i < 4 ; i++ ) - dstl[i] = htonl ( dstl[i] ); -} - -/** - * Encrypt data - * - * @v ctx Context - * @v src Data to encrypt - * @v dst Buffer for encrypted data - * @v len Length of data - */ -static void aes_encrypt ( void *ctx, const void *src, void *dst, - size_t len ) { - struct aes_context *aes_ctx = ctx; - - assert ( len == AES_BLOCKSIZE ); - if ( aes_ctx->decrypting ) - assert ( 0 ); - aes_call_axtls ( &aes_ctx->axtls_ctx, src, dst, AES_encrypt ); -} - -/** - * Decrypt data - * - * @v ctx Context - * @v src Data to decrypt - * @v dst Buffer for decrypted data - * @v len Length of data - */ -static void aes_decrypt ( void *ctx, const void *src, void *dst, - size_t len ) { - struct aes_context *aes_ctx = ctx; - - assert ( len == AES_BLOCKSIZE ); - if ( ! aes_ctx->decrypting ) { - AES_convert_key ( &aes_ctx->axtls_ctx ); - aes_ctx->decrypting = 1; - } - aes_call_axtls ( &aes_ctx->axtls_ctx, src, dst, AES_decrypt ); -} - -/** Basic AES algorithm */ -struct cipher_algorithm aes_algorithm = { - .name = "aes", - .ctxsize = sizeof ( struct aes_context ), - .blocksize = AES_BLOCKSIZE, - .setkey = aes_setkey, - .setiv = aes_setiv, - .encrypt = aes_encrypt, - .decrypt = aes_decrypt, -}; - -/* AES with cipher-block chaining */ -CBC_CIPHER ( aes_cbc, aes_cbc_algorithm, - aes_algorithm, struct aes_context, AES_BLOCKSIZE ); |