src/crypto/crypto_null.c

   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., 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 /**
  27  * @file
  28  *
  29  * Null crypto algorithm
  30  */
  31
  32 #include <string.h>
  33 #include <ipxe/crypto.h>
  34
  35 void digest_null_init ( void *ctx __unused ) {
  36         /* Do nothing */
  37 }
  38
  39 void digest_null_update ( void *ctx __unused, const void *src __unused,
  40                           size_t len __unused ) {
  41         /* Do nothing */
  42 }
  43
  44 void digest_null_final ( void *ctx __unused, void *out __unused ) {
  45         /* Do nothing */
  46 }
  47
  48 struct digest_algorithm digest_null = {
  49         .name = "null",
  50         .ctxsize = 0,
  51         .blocksize = 1,
  52         .digestsize = 0,
  53         .init = digest_null_init,
  54         .update = digest_null_update,
  55         .final = digest_null_final,
  56 };
  57
  58 int cipher_null_setkey ( void *ctx __unused, const void *key __unused,
  59                          size_t keylen __unused ) {
  60         /* Do nothing */
  61         return 0;
  62 }
  63
  64 void cipher_null_setiv ( void *ctx __unused, const void *iv __unused,
  65                          size_t ivlen __unused ) {
  66         /* Do nothing */
  67 }
  68
  69 void cipher_null_encrypt ( void *ctx __unused, const void *src, void *dst,
  70                            size_t len ) {
  71         memcpy ( dst, src, len );
  72 }
  73
  74 void cipher_null_decrypt ( void *ctx __unused, const void *src, void *dst,
  75                            size_t len ) {
  76         memcpy ( dst, src, len );
  77 }
  78
  79 void cipher_null_auth ( void *ctx __unused, void *auth __unused ) {
  80         /* Do nothing */
  81 }
  82
  83 struct cipher_algorithm cipher_null = {
  84         .name = "null",
  85         .ctxsize = 0,
  86         .blocksize = 1,
  87         .alignsize = 1,
  88         .authsize = 0,
  89         .setkey = cipher_null_setkey,
  90         .setiv = cipher_null_setiv,
  91         .encrypt = cipher_null_encrypt,
  92         .decrypt = cipher_null_decrypt,
  93         .auth = cipher_null_auth,
  94 };
  95
  96 int pubkey_null_init ( void *ctx __unused, const void *key __unused,
  97                        size_t key_len __unused ) {
  98         return 0;
  99 }
 100
 101 size_t pubkey_null_max_len ( void *ctx __unused ) {
 102         return 0;
 103 }
 104
 105 int pubkey_null_encrypt ( void *ctx __unused, const void *plaintext __unused,
 106                           size_t plaintext_len __unused,
 107                           void *ciphertext __unused ) {
 108         return 0;
 109 }
 110
 111 int pubkey_null_decrypt ( void *ctx __unused, const void *ciphertext __unused,
 112                           size_t ciphertext_len __unused,
 113                           void *plaintext __unused ) {
 114         return 0;
 115 }
 116
 117 int pubkey_null_sign ( void *ctx __unused,
 118                        struct digest_algorithm *digest __unused,
 119                        const void *value __unused, void *signature __unused ) {
 120         return 0;
 121 }
 122
 123 int pubkey_null_verify ( void *ctx __unused,
 124                          struct digest_algorithm *digest __unused,
 125                          const void *value __unused,
 126                          const void *signature __unused ,
 127                          size_t signature_len __unused ) {
 128         return 0;
 129 }
 130
 131 void pubkey_null_final ( void *ctx __unused ) {
 132         /* Do nothing */
 133 }
 134
 135 struct pubkey_algorithm pubkey_null = {
 136         .name = "null",
 137         .ctxsize = 0,
 138         .init = pubkey_null_init,
 139         .max_len = pubkey_null_max_len,
 140         .encrypt = pubkey_null_encrypt,
 141         .decrypt = pubkey_null_decrypt,
 142         .sign = pubkey_null_sign,
 143         .verify = pubkey_null_verify,
 144         .final = pubkey_null_final,
 145 };