70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
/*
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* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include "internal/cryptlib.h"
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#ifndef OPENSSL_NO_IDEA
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# include <openssl/evp.h>
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# include <openssl/objects.h>
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# include "internal/evp_int.h"
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# include <openssl/idea.h>
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/* Can't use IMPLEMENT_BLOCK_CIPHER because IDEA_ecb_encrypt is different */
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typedef struct {
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IDEA_KEY_SCHEDULE ks;
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} EVP_IDEA_KEY;
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static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc);
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/*
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* NB IDEA_ecb_encrypt doesn't take an 'encrypt' argument so we treat it as a
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* special case
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*/
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static int idea_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl)
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{
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BLOCK_CIPHER_ecb_loop()
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IDEA_ecb_encrypt(in + i, out + i, &EVP_C_DATA(EVP_IDEA_KEY,ctx)->ks);
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return 1;
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}
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BLOCK_CIPHER_func_cbc(idea, IDEA, EVP_IDEA_KEY, ks)
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BLOCK_CIPHER_func_ofb(idea, IDEA, 64, EVP_IDEA_KEY, ks)
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BLOCK_CIPHER_func_cfb(idea, IDEA, 64, EVP_IDEA_KEY, ks)
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BLOCK_CIPHER_defs(idea, IDEA_KEY_SCHEDULE, NID_idea, 8, 16, 8, 64,
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0, idea_init_key, NULL,
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EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, NULL)
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static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc)
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{
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if (!enc) {
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if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_OFB_MODE)
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enc = 1;
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else if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_CFB_MODE)
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enc = 1;
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}
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if (enc)
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IDEA_set_encrypt_key(key, &EVP_C_DATA(EVP_IDEA_KEY,ctx)->ks);
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else {
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IDEA_KEY_SCHEDULE tmp;
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IDEA_set_encrypt_key(key, &tmp);
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IDEA_set_decrypt_key(&tmp, &EVP_C_DATA(EVP_IDEA_KEY,ctx)->ks);
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OPENSSL_cleanse((unsigned char *)&tmp, sizeof(IDEA_KEY_SCHEDULE));
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}
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return 1;
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}
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#endif
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