79 lines
2.2 KiB
C
79 lines
2.2 KiB
C
|
/*
|
||
|
|
* Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
|
||
|
|
*
|
||
|
|
* Licensed under the OpenSSL license (the "License"). You may not use
|
||
|
|
* this file except in compliance with the License. You can obtain a copy
|
||
|
|
* in the file LICENSE in the source distribution or at
|
||
|
|
* https://www.openssl.org/source/license.html
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include "internal/cryptlib.h"
|
||
|
|
|
||
|
|
#ifndef OPENSSL_NO_RC5
|
||
|
|
|
||
|
|
# include <openssl/evp.h>
|
||
|
|
# include "crypto/evp.h"
|
||
|
|
# include <openssl/objects.h>
|
||
|
|
# include "evp_local.h"
|
||
|
|
# include <openssl/rc5.h>
|
||
|
|
|
||
|
|
static int r_32_12_16_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
|
||
|
|
const unsigned char *iv, int enc);
|
||
|
|
static int rc5_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
int rounds; /* number of rounds */
|
||
|
|
RC5_32_KEY ks; /* key schedule */
|
||
|
|
} EVP_RC5_KEY;
|
||
|
|
|
||
|
|
# define data(ctx) EVP_C_DATA(EVP_RC5_KEY,ctx)
|
||
|
|
|
||
|
|
IMPLEMENT_BLOCK_CIPHER(rc5_32_12_16, ks, RC5_32, EVP_RC5_KEY, NID_rc5,
|
||
|
|
8, RC5_32_KEY_LENGTH, 8, 64,
|
||
|
|
EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
|
||
|
|
r_32_12_16_init_key, NULL, NULL, NULL, rc5_ctrl)
|
||
|
|
|
||
|
|
static int rc5_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
|
||
|
|
{
|
||
|
|
switch (type) {
|
||
|
|
case EVP_CTRL_INIT:
|
||
|
|
data(c)->rounds = RC5_12_ROUNDS;
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
case EVP_CTRL_GET_RC5_ROUNDS:
|
||
|
|
*(int *)ptr = data(c)->rounds;
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
case EVP_CTRL_SET_RC5_ROUNDS:
|
||
|
|
switch (arg) {
|
||
|
|
case RC5_8_ROUNDS:
|
||
|
|
case RC5_12_ROUNDS:
|
||
|
|
case RC5_16_ROUNDS:
|
||
|
|
data(c)->rounds = arg;
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
default:
|
||
|
|
EVPerr(EVP_F_RC5_CTRL, EVP_R_UNSUPPORTED_NUMBER_OF_ROUNDS);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
default:
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int r_32_12_16_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
|
||
|
|
const unsigned char *iv, int enc)
|
||
|
|
{
|
||
|
|
if (EVP_CIPHER_CTX_key_length(ctx) > 255) {
|
||
|
|
EVPerr(EVP_F_R_32_12_16_INIT_KEY, EVP_R_BAD_KEY_LENGTH);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
RC5_32_set_key(&data(ctx)->ks, EVP_CIPHER_CTX_key_length(ctx),
|
||
|
|
key, data(ctx)->rounds);
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|