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