/* * $Id: cipher-null.c,v 1.1 2002/08/02 17:40:44 kyle Exp $ * Null Function Cipher * * Copyright (C) 2002 Herbert Valerio Riedel * * This module is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This module is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this module; if not, write to the Free Software * * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include #include #include #include #include #include #ifdef MODULE_LICENSE MODULE_LICENSE ("GPL"); #endif #ifdef MODULE_DESCRIPTION MODULE_DESCRIPTION ("Null Function Cipher / CryptoAPI"); #endif #ifdef MODULE_AUTHOR MODULE_AUTHOR ("Herbert Valerio Riedel "); #endif struct null_key_t { /* empty */ }; static int null_encrypt (struct cipher_context *cx, const u8 *in8, u8 *out8, int size, int atomic) { if (size != 16) return -EINVAL; memcpy (out8, in8, size); return 0; } static int null_decrypt (struct cipher_context *cx, const u8 *in8, u8 *out8, int size, int atomic) { if (size != 16) return -EINVAL; memcpy (out8, in8, size); return 0; } static int null_set_key (struct cipher_context *cx, const unsigned char *key, int key_len, int atomic) { if (key_len != 8 && key_len != 16 && key_len != 20 && key_len != 24 && key_len != 32) return -EINVAL; /* unsupported key length */ cx->key_length = key_len; return 0; } #define CIPHER_ID null #define CIPHER_BLOCKSIZE 128 #define CIPHER_KEY_SIZE_MASK CIPHER_KEYSIZE_64 | CIPHER_KEYSIZE_128 | CIPHER_KEYSIZE_160 | CIPHER_KEYSIZE_192 | CIPHER_KEYSIZE_256 #define CIPHER_KEY_SCHEDULE_SIZE sizeof(struct null_key_t) #include "gen-cipher.h" EXPORT_NO_SYMBOLS; /* * Overrides for Emacs so that we follow Linus's tabbing style. * Emacs will notice this stuff at the end of the file and automatically * adjust the settings for this buffer only. This must remain at the end * of the file. * --------------------------------------------------------------------------- * Local variables: * c-indent-level: 8 * c-brace-imaginary-offset: 0 * c-brace-offset: -8 * c-argdecl-indent: 8 * c-label-offset: -8 * c-continued-statement-offset: 8 * c-continued-brace-offset: 0 * End: */
