2 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
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
11 * DES low level APIs are deprecated for public use, but still ok for internal
14 #include "internal/deprecated.h"
17 #include "internal/cryptlib.h"
19 #ifndef OPENSSL_NO_DES
21 # include <openssl/evp.h>
22 # include <openssl/objects.h>
23 # include "crypto/evp.h"
24 # include <openssl/des.h>
25 # include "evp_local.h"
27 static int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
28 const unsigned char *iv, int enc);
29 static int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
30 const unsigned char *in, size_t inl);
33 DES_key_schedule ks; /* key schedule */
38 # define data(ctx) EVP_C_DATA(DESX_CBC_KEY,ctx)
40 static const EVP_CIPHER d_xcbc_cipher = {
49 EVP_CIPHER_set_asn1_iv,
50 EVP_CIPHER_get_asn1_iv,
55 const EVP_CIPHER *EVP_desx_cbc(void)
57 return &d_xcbc_cipher;
60 static int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
61 const unsigned char *iv, int enc)
63 DES_cblock *deskey = (DES_cblock *)key;
65 DES_set_key_unchecked(deskey, &data(ctx)->ks);
66 memcpy(&data(ctx)->inw[0], &key[8], 8);
67 memcpy(&data(ctx)->outw[0], &key[16], 8);
72 static int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
73 const unsigned char *in, size_t inl)
75 while (inl >= EVP_MAXCHUNK) {
76 DES_xcbc_encrypt(in, out, (long)EVP_MAXCHUNK, &data(ctx)->ks,
77 (DES_cblock *)ctx->iv,
78 &data(ctx)->inw, &data(ctx)->outw,
79 EVP_CIPHER_CTX_encrypting(ctx));
85 DES_xcbc_encrypt(in, out, (long)inl, &data(ctx)->ks,
86 (DES_cblock *)ctx->iv,
87 &data(ctx)->inw, &data(ctx)->outw,
88 EVP_CIPHER_CTX_encrypting(ctx));