168651Skris/* crypto/evp/e_rc5.c */
268651Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
368651Skris * All rights reserved.
468651Skris *
568651Skris * This package is an SSL implementation written
668651Skris * by Eric Young (eay@cryptsoft.com).
768651Skris * The implementation was written so as to conform with Netscapes SSL.
8280304Sjkim *
968651Skris * This library is free for commercial and non-commercial use as long as
1068651Skris * the following conditions are aheared to.  The following conditions
1168651Skris * apply to all code found in this distribution, be it the RC4, RSA,
1268651Skris * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
1368651Skris * included with this distribution is covered by the same copyright terms
1468651Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15280304Sjkim *
1668651Skris * Copyright remains Eric Young's, and as such any Copyright notices in
1768651Skris * the code are not to be removed.
1868651Skris * If this package is used in a product, Eric Young should be given attribution
1968651Skris * as the author of the parts of the library used.
2068651Skris * This can be in the form of a textual message at program startup or
2168651Skris * in documentation (online or textual) provided with the package.
22280304Sjkim *
2368651Skris * Redistribution and use in source and binary forms, with or without
2468651Skris * modification, are permitted provided that the following conditions
2568651Skris * are met:
2668651Skris * 1. Redistributions of source code must retain the copyright
2768651Skris *    notice, this list of conditions and the following disclaimer.
2868651Skris * 2. Redistributions in binary form must reproduce the above copyright
2968651Skris *    notice, this list of conditions and the following disclaimer in the
3068651Skris *    documentation and/or other materials provided with the distribution.
3168651Skris * 3. All advertising materials mentioning features or use of this software
3268651Skris *    must display the following acknowledgement:
3368651Skris *    "This product includes cryptographic software written by
3468651Skris *     Eric Young (eay@cryptsoft.com)"
3568651Skris *    The word 'cryptographic' can be left out if the rouines from the library
3668651Skris *    being used are not cryptographic related :-).
37280304Sjkim * 4. If you include any Windows specific code (or a derivative thereof) from
3868651Skris *    the apps directory (application code) you must include an acknowledgement:
3968651Skris *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40280304Sjkim *
4168651Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
4268651Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
4368651Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
4468651Skris * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
4568651Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
4668651Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
4768651Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
4868651Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
4968651Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
5068651Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
5168651Skris * SUCH DAMAGE.
52280304Sjkim *
5368651Skris * The licence and distribution terms for any publically available version or
5468651Skris * derivative of this code cannot be changed.  i.e. this code cannot simply be
5568651Skris * copied and put under another distribution licence
5668651Skris * [including the GNU Public Licence.]
5768651Skris */
5868651Skris
59160814Ssimon#include <stdio.h>
60160814Ssimon#include "cryptlib.h"
61160814Ssimon
62109998Smarkm#ifndef OPENSSL_NO_RC5
6368651Skris
64280304Sjkim# include <openssl/evp.h>
65280304Sjkim# include <openssl/objects.h>
66280304Sjkim# include "evp_locl.h"
67280304Sjkim# include <openssl/rc5.h>
6868651Skris
6968651Skrisstatic int r_32_12_16_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
70280304Sjkim                               const unsigned char *iv, int enc);
7168651Skrisstatic int rc5_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
7268651Skris
73280304Sjkimtypedef struct {
74280304Sjkim    int rounds;                 /* number of rounds */
75280304Sjkim    RC5_32_KEY ks;              /* key schedule */
76280304Sjkim} EVP_RC5_KEY;
7768651Skris
78280304Sjkim# define data(ctx)       EVP_C_DATA(EVP_RC5_KEY,ctx)
7968651Skris
80109998SmarkmIMPLEMENT_BLOCK_CIPHER(rc5_32_12_16, ks, RC5_32, EVP_RC5_KEY, NID_rc5,
81280304Sjkim                       8, RC5_32_KEY_LENGTH, 8, 64,
82280304Sjkim                       EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
83280304Sjkim                       r_32_12_16_init_key, NULL, NULL, NULL, rc5_ctrl)
8468651Skris
8568651Skrisstatic int rc5_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
86280304Sjkim{
87280304Sjkim    switch (type) {
88280304Sjkim    case EVP_CTRL_INIT:
89280304Sjkim        data(c)->rounds = RC5_12_ROUNDS;
90280304Sjkim        return 1;
9168651Skris
92280304Sjkim    case EVP_CTRL_GET_RC5_ROUNDS:
93280304Sjkim        *(int *)ptr = data(c)->rounds;
94280304Sjkim        return 1;
9568651Skris
96280304Sjkim    case EVP_CTRL_SET_RC5_ROUNDS:
97280304Sjkim        switch (arg) {
98280304Sjkim        case RC5_8_ROUNDS:
99280304Sjkim        case RC5_12_ROUNDS:
100280304Sjkim        case RC5_16_ROUNDS:
101280304Sjkim            data(c)->rounds = arg;
102280304Sjkim            return 1;
10368651Skris
104280304Sjkim        default:
105280304Sjkim            EVPerr(EVP_F_RC5_CTRL, EVP_R_UNSUPORTED_NUMBER_OF_ROUNDS);
106280304Sjkim            return 0;
107280304Sjkim        }
10868651Skris
109280304Sjkim    default:
110280304Sjkim        return -1;
111280304Sjkim    }
112280304Sjkim}
113280304Sjkim
11468651Skrisstatic int r_32_12_16_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
115280304Sjkim                               const unsigned char *iv, int enc)
116280304Sjkim{
117280304Sjkim    RC5_32_set_key(&data(ctx)->ks, EVP_CIPHER_CTX_key_length(ctx),
118280304Sjkim                   key, data(ctx)->rounds);
119280304Sjkim    return 1;
120280304Sjkim}
12168651Skris
12268651Skris#endif
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