1 /*
2 * Copyright (C) 2007 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., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19 FILE_LICENCE ( GPL2_OR_LATER );
20
21 /**
22 * @file
23 *
24 * Null crypto algorithm
25 */
26
27 #include <string.h>
28 #include <gpxe/crypto.h>
29
digest_null_init(void * ctx __unused)30 static void digest_null_init ( void *ctx __unused ) {
31 /* Do nothing */
32 }
33
digest_null_update(void * ctx __unused,const void * src __unused,size_t len __unused)34 static void digest_null_update ( void *ctx __unused, const void *src __unused,
35 size_t len __unused ) {
36 /* Do nothing */
37 }
38
digest_null_final(void * ctx __unused,void * out __unused)39 static void digest_null_final ( void *ctx __unused, void *out __unused ) {
40 /* Do nothing */
41 }
42
43 struct digest_algorithm digest_null = {
44 .name = "null",
45 .ctxsize = 0,
46 .blocksize = 1,
47 .digestsize = 0,
48 .init = digest_null_init,
49 .update = digest_null_update,
50 .final = digest_null_final,
51 };
52
cipher_null_setkey(void * ctx __unused,const void * key __unused,size_t keylen __unused)53 static int cipher_null_setkey ( void *ctx __unused, const void *key __unused,
54 size_t keylen __unused ) {
55 /* Do nothing */
56 return 0;
57 }
58
cipher_null_setiv(void * ctx __unused,const void * iv __unused)59 static void cipher_null_setiv ( void *ctx __unused,
60 const void *iv __unused ) {
61 /* Do nothing */
62 }
63
cipher_null_encrypt(void * ctx __unused,const void * src,void * dst,size_t len)64 static void cipher_null_encrypt ( void *ctx __unused, const void *src,
65 void *dst, size_t len ) {
66 memcpy ( dst, src, len );
67 }
68
cipher_null_decrypt(void * ctx __unused,const void * src,void * dst,size_t len)69 static void cipher_null_decrypt ( void *ctx __unused, const void *src,
70 void *dst, size_t len ) {
71 memcpy ( dst, src, len );
72 }
73
74 struct cipher_algorithm cipher_null = {
75 .name = "null",
76 .ctxsize = 0,
77 .blocksize = 1,
78 .setkey = cipher_null_setkey,
79 .setiv = cipher_null_setiv,
80 .encrypt = cipher_null_encrypt,
81 .decrypt = cipher_null_decrypt,
82 };
83
84 struct pubkey_algorithm pubkey_null = {
85 .name = "null",
86 .ctxsize = 0,
87 };
88