2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (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
11 #include "internal/cryptlib.h"
13 #ifndef OPENSSL_NO_DES
15 # include <openssl/evp.h>
16 # include <openssl/objects.h>
17 # include "internal/evp_int.h"
18 # include <openssl/des.h>
20 static int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
21 const unsigned char *iv, int enc);
22 static int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
23 const unsigned char *in, size_t inl);
26 DES_key_schedule ks; /* key schedule */
31 # define data(ctx) EVP_C_DATA(DESX_CBC_KEY,ctx)
33 static const EVP_CIPHER d_xcbc_cipher = {
41 EVP_CIPHER_set_asn1_iv,
42 EVP_CIPHER_get_asn1_iv,
47 const EVP_CIPHER *EVP_desx_cbc(void)
49 return &d_xcbc_cipher;
52 static int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
53 const unsigned char *iv, int enc)
55 DES_cblock *deskey = (DES_cblock *)key;
57 DES_set_key_unchecked(deskey, &data(ctx)->ks);
58 memcpy(&data(ctx)->inw[0], &key[8], 8);
59 memcpy(&data(ctx)->outw[0], &key[16], 8);
64 static int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
65 const unsigned char *in, size_t inl)
67 while (inl >= EVP_MAXCHUNK) {
68 DES_xcbc_encrypt(in, out, (long)EVP_MAXCHUNK, &data(ctx)->ks,
69 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
70 &data(ctx)->inw, &data(ctx)->outw,
71 EVP_CIPHER_CTX_encrypting(ctx));
77 DES_xcbc_encrypt(in, out, (long)inl, &data(ctx)->ks,
78 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
79 &data(ctx)->inw, &data(ctx)->outw,
80 EVP_CIPHER_CTX_encrypting(ctx));