1 /*
2 * Copyright 1995-2021 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 /*
11 * IDEA low level APIs are deprecated for public use, but still ok for internal
12 * use where we're using them to implement the higher level EVP interface, as is
13 * the case here.
14 */
15 #include "internal/deprecated.h"
16
17 #include <stdio.h>
18 #include "internal/cryptlib.h"
19
20 #ifndef OPENSSL_NO_IDEA
21 # include <openssl/evp.h>
22 # include <openssl/objects.h>
23 # include "crypto/evp.h"
24 # include <openssl/idea.h>
25 # include "evp_local.h"
26
27 /* Can't use IMPLEMENT_BLOCK_CIPHER because IDEA_ecb_encrypt is different */
28
29 typedef struct {
30 IDEA_KEY_SCHEDULE ks;
31 } EVP_IDEA_KEY;
32
33 static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
34 const unsigned char *iv, int enc);
35
36 /*
37 * NB IDEA_ecb_encrypt doesn't take an 'encrypt' argument so we treat it as a
38 * special case
39 */
40
idea_ecb_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t inl)41 static int idea_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
42 const unsigned char *in, size_t inl)
43 {
44 BLOCK_CIPHER_ecb_loop()
45 IDEA_ecb_encrypt(in + i, out + i, &EVP_C_DATA(EVP_IDEA_KEY, ctx)->ks);
46 return 1;
47 }
48
BLOCK_CIPHER_func_cbc(idea,IDEA,EVP_IDEA_KEY,ks)49 BLOCK_CIPHER_func_cbc(idea, IDEA, EVP_IDEA_KEY, ks)
50 BLOCK_CIPHER_func_ofb(idea, IDEA, 64, EVP_IDEA_KEY, ks)
51 BLOCK_CIPHER_func_cfb(idea, IDEA, 64, EVP_IDEA_KEY, ks)
52
53 BLOCK_CIPHER_defs(idea, IDEA_KEY_SCHEDULE, NID_idea, 8, 16, 8, 64,
54 0, idea_init_key, NULL,
55 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, NULL)
56
57 static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
58 const unsigned char *iv, int enc)
59 {
60 if (!enc) {
61 if (EVP_CIPHER_CTX_get_mode(ctx) == EVP_CIPH_OFB_MODE)
62 enc = 1;
63 else if (EVP_CIPHER_CTX_get_mode(ctx) == EVP_CIPH_CFB_MODE)
64 enc = 1;
65 }
66 if (enc)
67 IDEA_set_encrypt_key(key, &EVP_C_DATA(EVP_IDEA_KEY, ctx)->ks);
68 else {
69 IDEA_KEY_SCHEDULE tmp;
70
71 IDEA_set_encrypt_key(key, &tmp);
72 IDEA_set_decrypt_key(&tmp, &EVP_C_DATA(EVP_IDEA_KEY, ctx)->ks);
73 OPENSSL_cleanse((unsigned char *)&tmp, sizeof(IDEA_KEY_SCHEDULE));
74 }
75 return 1;
76 }
77
78 #endif
79
