e_idea.c
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/*
* Copyright 1995-2016 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_IDEA
# include <openssl/evp.h>
# include <openssl/objects.h>
# include "internal/evp_int.h"
# include <openssl/idea.h>
/* Can't use IMPLEMENT_BLOCK_CIPHER because IDEA_ecb_encrypt is different */
typedef struct {
IDEA_KEY_SCHEDULE ks;
} EVP_IDEA_KEY;
static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv, int enc);
/*
* NB IDEA_ecb_encrypt doesn't take an 'encrypt' argument so we treat it as a
* special case
*/
static int idea_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
{
BLOCK_CIPHER_ecb_loop()
IDEA_ecb_encrypt(in + i, out + i, &EVP_C_DATA(EVP_IDEA_KEY,ctx)->ks);
return 1;
}
BLOCK_CIPHER_func_cbc(idea, IDEA, EVP_IDEA_KEY, ks)
BLOCK_CIPHER_func_ofb(idea, IDEA, 64, EVP_IDEA_KEY, ks)
BLOCK_CIPHER_func_cfb(idea, IDEA, 64, EVP_IDEA_KEY, ks)
BLOCK_CIPHER_defs(idea, IDEA_KEY_SCHEDULE, NID_idea, 8, 16, 8, 64,
0, idea_init_key, NULL,
EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, NULL)
static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv, int enc)
{
if (!enc) {
if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_OFB_MODE)
enc = 1;
else if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_CFB_MODE)
enc = 1;
}
if (enc)
IDEA_set_encrypt_key(key, &EVP_C_DATA(EVP_IDEA_KEY,ctx)->ks);
else {
IDEA_KEY_SCHEDULE tmp;
IDEA_set_encrypt_key(key, &tmp);
IDEA_set_decrypt_key(&tmp, &EVP_C_DATA(EVP_IDEA_KEY,ctx)->ks);
OPENSSL_cleanse((unsigned char *)&tmp, sizeof(IDEA_KEY_SCHEDULE));
}
return 1;
}
#endif