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 static void digest_null_init ( void *ctx __unused ) {
  36         /* Do nothing */
  37 }
  38
  39 static void digest_null_update ( void *ctx __unused, const void *src __unused,
  40                                  size_t len __unused ) {
  41         /* Do nothing */
  42 }
  43
  44 static 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 static 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 static void cipher_null_setiv ( void *ctx __unused,
  65                                 const void *iv __unused ) {
  66         /* Do nothing */
  67 }
  68
  69 static void cipher_null_encrypt ( void *ctx __unused, const void *src,
  70                                   void *dst, size_t len ) {
  71         memcpy ( dst, src, len );
  72 }
  73
  74 static void cipher_null_decrypt ( void *ctx __unused, const void *src,
  75                                   void *dst, size_t len ) {
  76         memcpy ( dst, src, len );
  77 }
  78
  79 struct cipher_algorithm cipher_null = {
  80         .name = "null",
  81         .ctxsize = 0,
  82         .blocksize = 1,
  83         .setkey = cipher_null_setkey,
  84         .setiv = cipher_null_setiv,
  85         .encrypt = cipher_null_encrypt,
  86         .decrypt = cipher_null_decrypt,
  87 };
  88
  89 static int pubkey_null_init ( void *ctx __unused, const void *key __unused,
  90                               size_t key_len __unused ) {
  91         return 0;
  92 }
  93
  94 static size_t pubkey_null_max_len ( void *ctx __unused ) {
  95         return 0;
  96 }
  97
  98 static int pubkey_null_encrypt ( void *ctx __unused,
  99                                  const void *plaintext __unused,
 100                                  size_t plaintext_len __unused,
 101                                  void *ciphertext __unused ) {
 102         return 0;
 103 }
 104
 105 static int pubkey_null_decrypt ( void *ctx __unused,
 106                                  const void *ciphertext __unused,
 107                                  size_t ciphertext_len __unused,
 108                                  void *plaintext __unused ) {
 109         return 0;
 110 }
 111
 112 static int pubkey_null_sign ( void *ctx __unused,
 113                               struct digest_algorithm *digest __unused,
 114                               const void *value __unused,
 115                               void *signature __unused ) {
 116         return 0;
 117 }
 118
 119 static int pubkey_null_verify ( void *ctx __unused,
 120                                 struct digest_algorithm *digest __unused,
 121                                 const void *value __unused,
 122                                 const void *signature __unused ,
 123                                 size_t signature_len __unused ) {
 124         return 0;
 125 }
 126
 127 static void pubkey_null_final ( void *ctx __unused ) {
 128         /* Do nothing */
 129 }
 130
 131 struct pubkey_algorithm pubkey_null = {
 132         .name = "null",
 133         .ctxsize = 0,
 134         .init = pubkey_null_init,
 135         .max_len = pubkey_null_max_len,
 136         .encrypt = pubkey_null_encrypt,
 137         .decrypt = pubkey_null_decrypt,
 138         .sign = pubkey_null_sign,
 139         .verify = pubkey_null_verify,
 140         .final = pubkey_null_final,
 141 };