1/*
2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <stdio.h>
11#include "internal/cryptlib.h"
12
13#ifndef OPENSSL_NO_IDEA
14# include <openssl/evp.h>
15# include <openssl/objects.h>
16# include "crypto/evp.h"
17# include <openssl/idea.h>
18
19/* Can't use IMPLEMENT_BLOCK_CIPHER because IDEA_ecb_encrypt is different */
20
21typedef struct {
22 IDEA_KEY_SCHEDULE ks;
23} EVP_IDEA_KEY;
24
25static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
26 const unsigned char *iv, int enc);
27
28/*
29 * NB IDEA_ecb_encrypt doesn't take an 'encrypt' argument so we treat it as a
30 * special case
31 */
32
33static int idea_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
34 const unsigned char *in, size_t inl)
35{
36 BLOCK_CIPHER_ecb_loop()
37 IDEA_ecb_encrypt(in + i, out + i, &EVP_C_DATA(EVP_IDEA_KEY,ctx)->ks);
38 return 1;
39}
40
41BLOCK_CIPHER_func_cbc(idea, IDEA, EVP_IDEA_KEY, ks)
42BLOCK_CIPHER_func_ofb(idea, IDEA, 64, EVP_IDEA_KEY, ks)
43BLOCK_CIPHER_func_cfb(idea, IDEA, 64, EVP_IDEA_KEY, ks)
44
45BLOCK_CIPHER_defs(idea, IDEA_KEY_SCHEDULE, NID_idea, 8, 16, 8, 64,
46 0, idea_init_key, NULL,
47 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, NULL)
48
49static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
50 const unsigned char *iv, int enc)
51{
52 if (!enc) {
53 if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_OFB_MODE)
54 enc = 1;
55 else if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_CFB_MODE)
56 enc = 1;
57 }
58 if (enc)
59 IDEA_set_encrypt_key(key, &EVP_C_DATA(EVP_IDEA_KEY,ctx)->ks);
60 else {
61 IDEA_KEY_SCHEDULE tmp;
62
63 IDEA_set_encrypt_key(key, &tmp);
64 IDEA_set_decrypt_key(&tmp, &EVP_C_DATA(EVP_IDEA_KEY,ctx)->ks);
65 OPENSSL_cleanse((unsigned char *)&tmp, sizeof(IDEA_KEY_SCHEDULE));
66 }
67 return 1;
68}
69
70#endif
71