122 lines
4.8 KiB
C
122 lines
4.8 KiB
C
/* crypto/evp/e_rc5.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include "cryptlib.h"
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#ifndef OPENSSL_NO_RC5
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# include <openssl/evp.h>
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# include <openssl/objects.h>
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# include "evp_locl.h"
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# include <openssl/rc5.h>
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static int r_32_12_16_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc);
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static int rc5_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
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typedef struct {
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int rounds; /* number of rounds */
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RC5_32_KEY ks; /* key schedule */
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} EVP_RC5_KEY;
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# define data(ctx) EVP_C_DATA(EVP_RC5_KEY,ctx)
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IMPLEMENT_BLOCK_CIPHER(rc5_32_12_16, ks, RC5_32, EVP_RC5_KEY, NID_rc5,
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8, RC5_32_KEY_LENGTH, 8, 64,
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EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
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r_32_12_16_init_key, NULL, NULL, NULL, rc5_ctrl)
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static int rc5_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
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{
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switch (type) {
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case EVP_CTRL_INIT:
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data(c)->rounds = RC5_12_ROUNDS;
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return 1;
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case EVP_CTRL_GET_RC5_ROUNDS:
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*(int *)ptr = data(c)->rounds;
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return 1;
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case EVP_CTRL_SET_RC5_ROUNDS:
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switch (arg) {
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case RC5_8_ROUNDS:
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case RC5_12_ROUNDS:
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case RC5_16_ROUNDS:
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data(c)->rounds = arg;
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return 1;
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default:
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EVPerr(EVP_F_RC5_CTRL, EVP_R_UNSUPORTED_NUMBER_OF_ROUNDS);
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return 0;
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}
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default:
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return -1;
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}
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}
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static int r_32_12_16_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc)
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{
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RC5_32_set_key(&data(ctx)->ks, EVP_CIPHER_CTX_key_length(ctx),
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key, data(ctx)->rounds);
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return 1;
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}
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#endif
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