1142425Snectar/* crypto/evp/e_rc5.c */ 2160814Ssimon/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3142425Snectar * All rights reserved. 4142425Snectar * 5142425Snectar * This package is an SSL implementation written 6142425Snectar * by Eric Young (eay@cryptsoft.com). 7142425Snectar * The implementation was written so as to conform with Netscapes SSL. 8142425Snectar * 9142425Snectar * This library is free for commercial and non-commercial use as long as 10142425Snectar * the following conditions are aheared to. The following conditions 11142425Snectar * apply to all code found in this distribution, be it the RC4, RSA, 12142425Snectar * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13142425Snectar * included with this distribution is covered by the same copyright terms 14142425Snectar * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15142425Snectar * 16142425Snectar * Copyright remains Eric Young's, and as such any Copyright notices in 17142425Snectar * the code are not to be removed. 18142425Snectar * If this package is used in a product, Eric Young should be given attribution 19142425Snectar * as the author of the parts of the library used. 20142425Snectar * This can be in the form of a textual message at program startup or 21142425Snectar * in documentation (online or textual) provided with the package. 22142425Snectar * 23142425Snectar * Redistribution and use in source and binary forms, with or without 24142425Snectar * modification, are permitted provided that the following conditions 25142425Snectar * are met: 26142425Snectar * 1. Redistributions of source code must retain the copyright 27142425Snectar * notice, this list of conditions and the following disclaimer. 28142425Snectar * 2. Redistributions in binary form must reproduce the above copyright 29142425Snectar * notice, this list of conditions and the following disclaimer in the 30142425Snectar * documentation and/or other materials provided with the distribution. 31142425Snectar * 3. All advertising materials mentioning features or use of this software 32142425Snectar * must display the following acknowledgement: 33142425Snectar * "This product includes cryptographic software written by 34142425Snectar * Eric Young (eay@cryptsoft.com)" 35142425Snectar * The word 'cryptographic' can be left out if the rouines from the library 36238405Sjkim * being used are not cryptographic related :-). 37142425Snectar * 4. If you include any Windows specific code (or a derivative thereof) from 38142425Snectar * the apps directory (application code) you must include an acknowledgement: 39142425Snectar * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40142425Snectar * 41142425Snectar * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42142425Snectar * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43142425Snectar * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44142425Snectar * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45142425Snectar * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46142425Snectar * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47142425Snectar * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48142425Snectar * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49160814Ssimon * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50160814Ssimon * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51142425Snectar * SUCH DAMAGE. 52142425Snectar * 53142425Snectar * The licence and distribution terms for any publically available version or 54142425Snectar * derivative of this code cannot be changed. i.e. this code cannot simply be 55142425Snectar * copied and put under another distribution licence 56142425Snectar * [including the GNU Public Licence.] 57142425Snectar */ 58142425Snectar 59142425Snectar#include <stdio.h> 60142425Snectar#include "cryptlib.h" 61142425Snectar 62142425Snectar#ifndef OPENSSL_NO_RC5 63142425Snectar 64284285Sjkim# include <openssl/evp.h> 65284285Sjkim# include <openssl/objects.h> 66142425Snectar# include "evp_locl.h" 67160814Ssimon# include <openssl/rc5.h> 68142425Snectar 69142425Snectarstatic int r_32_12_16_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 70142425Snectar const unsigned char *iv, int enc); 71142425Snectarstatic int rc5_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); 72142425Snectar 73142425Snectartypedef struct { 74142425Snectar int rounds; /* number of rounds */ 75142425Snectar RC5_32_KEY ks; /* key schedule */ 76142425Snectar} EVP_RC5_KEY; 77142425Snectar 78142425Snectar# define data(ctx) EVP_C_DATA(EVP_RC5_KEY,ctx) 79142425Snectar 80142425SnectarIMPLEMENT_BLOCK_CIPHER(rc5_32_12_16, ks, RC5_32, EVP_RC5_KEY, NID_rc5, 81142425Snectar 8, RC5_32_KEY_LENGTH, 8, 64, 82142425Snectar EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, 83142425Snectar r_32_12_16_init_key, NULL, NULL, NULL, rc5_ctrl) 84142425Snectar 85160814Ssimonstatic int rc5_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) 86160814Ssimon{ 87160814Ssimon switch (type) { 88160814Ssimon case EVP_CTRL_INIT: 89238405Sjkim data(c)->rounds = RC5_12_ROUNDS; 90238405Sjkim return 1; 91238405Sjkim 92238405Sjkim case EVP_CTRL_GET_RC5_ROUNDS: 93238405Sjkim *(int *)ptr = data(c)->rounds; 94238405Sjkim return 1; 95238405Sjkim 96 case EVP_CTRL_SET_RC5_ROUNDS: 97 switch (arg) { 98 case RC5_8_ROUNDS: 99 case RC5_12_ROUNDS: 100 case RC5_16_ROUNDS: 101 data(c)->rounds = arg; 102 return 1; 103 104 default: 105 EVPerr(EVP_F_RC5_CTRL, EVP_R_UNSUPORTED_NUMBER_OF_ROUNDS); 106 return 0; 107 } 108 109 default: 110 return -1; 111 } 112} 113 114static int r_32_12_16_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 115 const unsigned char *iv, int enc) 116{ 117 RC5_32_set_key(&data(ctx)->ks, EVP_CIPHER_CTX_key_length(ctx), 118 key, data(ctx)->rounds); 119 return 1; 120} 121 122#endif 123