/*

 * 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