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78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
/*
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* Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include "internal/cryptlib.h"
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#ifndef OPENSSL_NO_RC5
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# include <openssl/evp.h>
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# include "crypto/evp.h"
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# include <openssl/objects.h>
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# include "evp_local.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_UNSUPPORTED_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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if (EVP_CIPHER_CTX_key_length(ctx) > 255) {
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EVPerr(EVP_F_R_32_12_16_INIT_KEY, EVP_R_BAD_KEY_LENGTH);
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return 0;
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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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