1 /* 2 * Copyright (C) 2007 Michael Brown <mbrown (at) 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 30 static void digest_null_init ( void *ctx __unused ) { 31 /* Do nothing */ 32 } 33 34 static void digest_null_update ( void *ctx __unused, const void *src __unused, 35 size_t len __unused ) { 36 /* Do nothing */ 37 } 38 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 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 59 static void cipher_null_setiv ( void *ctx __unused, 60 const void *iv __unused ) { 61 /* Do nothing */ 62 } 63 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 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
