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 | |
21 | typedef struct { |
22 | IDEA_KEY_SCHEDULE ks; |
23 | } EVP_IDEA_KEY; |
24 | |
25 | static 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 | |
33 | static 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 | |
41 | BLOCK_CIPHER_func_cbc(idea, IDEA, EVP_IDEA_KEY, ks) |
42 | BLOCK_CIPHER_func_ofb(idea, IDEA, 64, EVP_IDEA_KEY, ks) |
43 | BLOCK_CIPHER_func_cfb(idea, IDEA, 64, EVP_IDEA_KEY, ks) |
44 | |
45 | BLOCK_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 | |
49 | static 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 | |