[331] | 1 | /*
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| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include "internal/cryptlib.h"
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| 12 |
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| 13 | #ifndef OPENSSL_NO_IDEA
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| 14 | # include <openssl/evp.h>
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| 15 | # include <openssl/objects.h>
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| 16 | # include "internal/evp_int.h"
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| 17 | # include <openssl/idea.h>
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| 18 |
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| 19 | /* Can't use IMPLEMENT_BLOCK_CIPHER because IDEA_ecb_encrypt is different */
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| 20 |
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| 21 | typedef struct {
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| 22 | IDEA_KEY_SCHEDULE ks;
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| 23 | } EVP_IDEA_KEY;
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| 24 |
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| 25 | static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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| 26 | const unsigned char *iv, int enc);
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| 27 |
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| 28 | /*
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| 29 | * NB IDEA_ecb_encrypt doesn't take an 'encrypt' argument so we treat it as a
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| 30 | * special case
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| 31 | */
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| 32 |
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| 33 | static int idea_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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| 34 | const unsigned char *in, size_t inl)
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| 35 | {
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| 36 | BLOCK_CIPHER_ecb_loop()
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| 37 | IDEA_ecb_encrypt(in + i, out + i, &EVP_C_DATA(EVP_IDEA_KEY,ctx)->ks);
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| 38 | return 1;
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| 39 | }
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| 40 |
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| 41 | BLOCK_CIPHER_func_cbc(idea, IDEA, EVP_IDEA_KEY, ks)
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| 42 | BLOCK_CIPHER_func_ofb(idea, IDEA, 64, EVP_IDEA_KEY, ks)
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| 43 | BLOCK_CIPHER_func_cfb(idea, IDEA, 64, EVP_IDEA_KEY, ks)
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| 44 |
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| 45 | BLOCK_CIPHER_defs(idea, IDEA_KEY_SCHEDULE, NID_idea, 8, 16, 8, 64,
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| 46 | 0, idea_init_key, NULL,
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| 47 | EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, NULL)
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| 48 |
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| 49 | static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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| 50 | const unsigned char *iv, int enc)
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| 51 | {
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| 52 | if (!enc) {
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| 53 | if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_OFB_MODE)
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| 54 | enc = 1;
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| 55 | else if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_CFB_MODE)
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| 56 | enc = 1;
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| 57 | }
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| 58 | if (enc)
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| 59 | IDEA_set_encrypt_key(key, &EVP_C_DATA(EVP_IDEA_KEY,ctx)->ks);
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| 60 | else {
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| 61 | IDEA_KEY_SCHEDULE tmp;
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| 62 |
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| 63 | IDEA_set_encrypt_key(key, &tmp);
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| 64 | IDEA_set_decrypt_key(&tmp, &EVP_C_DATA(EVP_IDEA_KEY,ctx)->ks);
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| 65 | OPENSSL_cleanse((unsigned char *)&tmp, sizeof(IDEA_KEY_SCHEDULE));
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| 66 | }
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| 67 | return 1;
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| 68 | }
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| 69 |
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| 70 | #endif
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