[fdt] Add ability to parse a MAC address from a flattened device tree
[ipxe.git] / src / crypto / ecb.c
1 /*
2 * Copyright (C) 2009 Michael Brown <mbrown@fensystems.co.uk>.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 * 02110-1301, USA.
18 *
19 * You can also choose to distribute this program under the terms of
20 * the Unmodified Binary Distribution Licence (as given in the file
21 * COPYING.UBDL), provided that you have satisfied its requirements.
22 */
23
24 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
25
26 #include <assert.h>
27 #include <ipxe/crypto.h>
28 #include <ipxe/ecb.h>
29
30 /** @file
31 *
32 * Electronic codebook (ECB)
33 *
34 */
35
36 /**
37 * Encrypt data
38 *
39 * @v ctx Context
40 * @v src Data to encrypt
41 * @v dst Buffer for encrypted data
42 * @v len Length of data
43 * @v raw_cipher Underlying cipher algorithm
44 */
45 void ecb_encrypt ( void *ctx, const void *src, void *dst, size_t len,
46 struct cipher_algorithm *raw_cipher ) {
47 size_t blocksize = raw_cipher->blocksize;
48
49 assert ( ( len % blocksize ) == 0 );
50
51 while ( len ) {
52 cipher_encrypt ( raw_cipher, ctx, src, dst, blocksize );
53 dst += blocksize;
54 src += blocksize;
55 len -= blocksize;
56 }
57 }
58
59 /**
60 * Decrypt data
61 *
62 * @v ctx Context
63 * @v src Data to decrypt
64 * @v dst Buffer for decrypted data
65 * @v len Length of data
66 * @v raw_cipher Underlying cipher algorithm
67 */
68 void ecb_decrypt ( void *ctx, const void *src, void *dst, size_t len,
69 struct cipher_algorithm *raw_cipher ) {
70 size_t blocksize = raw_cipher->blocksize;
71
72 assert ( ( len % blocksize ) == 0 );
73
74 while ( len ) {
75 cipher_decrypt ( raw_cipher, ctx, src, dst, blocksize );
76 dst += blocksize;
77 src += blocksize;
78 len -= blocksize;
79 }
80 }