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/*
* Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/*
* DES low level APIs are deprecated for public use, but still ok for internal
* use.
*/
#include "internal/deprecated.h"
#include "prov/ciphercommon.h"
#include "cipher_des.h"
static int cipher_hw_des_initkey(PROV_CIPHER_CTX *ctx,
const unsigned char *key, size_t keylen)
{
PROV_DES_CTX *dctx = (PROV_DES_CTX *)ctx;
DES_cblock *deskey = (DES_cblock *)key;
DES_key_schedule *ks = &dctx->dks.ks;
dctx->dstream.cbc = NULL;
#if defined(SPARC_DES_CAPABLE)
if (SPARC_DES_CAPABLE) {
if (ctx->mode == EVP_CIPH_CBC_MODE) {
des_t4_key_expand(&deskey[0], ks);
dctx->dstream.cbc = ctx->enc ? des_t4_cbc_encrypt : des_t4_cbc_decrypt;
return 1;
}
}
#endif
DES_set_key_unchecked(deskey, ks);
return 1;
}
static void cipher_hw_des_copyctx(PROV_CIPHER_CTX *dst,
const PROV_CIPHER_CTX *src)
{
PROV_DES_CTX *sctx = (PROV_DES_CTX *)src;
PROV_DES_CTX *dctx = (PROV_DES_CTX *)dst;
*dctx = *sctx;
dst->ks = &dctx->dks.ks;
}
static int cipher_hw_des_ecb_cipher(PROV_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t len)
{
size_t i, bl = ctx->blocksize;
DES_key_schedule *key = &(((PROV_DES_CTX *)ctx)->dks.ks);
if (len < bl)
return 1;
for (i = 0, len -= bl; i <= len; i += bl)
DES_ecb_encrypt((const_DES_cblock *)(in + i),
(const_DES_cblock *)(out + i), key, ctx->enc);
return 1;
}
static int cipher_hw_des_cbc_cipher(PROV_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t len)
{
PROV_DES_CTX *dctx = (PROV_DES_CTX *)ctx;
DES_key_schedule *key = &(dctx->dks.ks);
if (dctx->dstream.cbc != NULL) {
(*dctx->dstream.cbc)(in, out, len, key, ctx->iv);
return 1;
}
while (len >= MAXCHUNK) {
DES_ncbc_encrypt(in, out, MAXCHUNK, key, (DES_cblock *)ctx->iv,
ctx->enc);
len -= MAXCHUNK;
in += MAXCHUNK;
out += MAXCHUNK;
}
if (len > 0)
DES_ncbc_encrypt(in, out, (long)len, key, (DES_cblock *)ctx->iv,
ctx->enc);
return 1;
}
static int cipher_hw_des_ofb64_cipher(PROV_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t len)
{
int num = ctx->num;
DES_key_schedule *key = &(((PROV_DES_CTX *)ctx)->dks.ks);
while (len >= MAXCHUNK) {
DES_ofb64_encrypt(in, out, MAXCHUNK, key, (DES_cblock *)ctx->iv, &num);
len -= MAXCHUNK;
in += MAXCHUNK;
out += MAXCHUNK;
}
if (len > 0) {
DES_ofb64_encrypt(in, out, (long)len, key, (DES_cblock *)ctx->iv, &num);
}
ctx->num = num;
return 1;
}
static int cipher_hw_des_cfb64_cipher(PROV_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t len)
{
size_t chunk = MAXCHUNK;
DES_key_schedule *key = &(((PROV_DES_CTX *)ctx)->dks.ks);
int num = ctx->num;
if (len < chunk)
chunk = len;
while (len > 0 && len >= chunk) {
DES_cfb64_encrypt(in, out, (long)chunk, key, (DES_cblock *)ctx->iv,
&num, ctx->enc);
len -= chunk;
in += chunk;
out += chunk;
if (len < chunk)
chunk = len;
}
ctx->num = num;
return 1;
}
/*
* Although we have a CFB-r implementation for DES, it doesn't pack the right
* way, so wrap it here
*/
static int cipher_hw_des_cfb1_cipher(PROV_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
{
size_t n, chunk = MAXCHUNK / 8;
DES_key_schedule *key = &(((PROV_DES_CTX *)ctx)->dks.ks);
unsigned char c[1];
unsigned char d[1] = { 0 };
if (inl < chunk)
chunk = inl;
while (inl && inl >= chunk) {
for (n = 0; n < chunk * 8; ++n) {
c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0;
DES_cfb_encrypt(c, d, 1, 1, key, (DES_cblock *)ctx->iv, ctx->enc);
out[n / 8] = (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) | ((d[0] & 0x80) >> (unsigned int)(n % 8));
}
inl -= chunk;
in += chunk;
out += chunk;
if (inl < chunk)
chunk = inl;
}
return 1;
}
static int cipher_hw_des_cfb8_cipher(PROV_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
{
DES_key_schedule *key = &(((PROV_DES_CTX *)ctx)->dks.ks);
while (inl >= MAXCHUNK) {
DES_cfb_encrypt(in, out, 8, (long)MAXCHUNK, key,
(DES_cblock *)ctx->iv, ctx->enc);
inl -= MAXCHUNK;
in += MAXCHUNK;
out += MAXCHUNK;
}
if (inl > 0)
DES_cfb_encrypt(in, out, 8, (long)inl, key,
(DES_cblock *)ctx->iv, ctx->enc);
return 1;
}
#define PROV_CIPHER_HW_des_mode(mode) \
static const PROV_CIPHER_HW des_##mode = { \
cipher_hw_des_initkey, \
cipher_hw_des_##mode##_cipher, \
cipher_hw_des_copyctx \
}; \
const PROV_CIPHER_HW *ossl_prov_cipher_hw_des_##mode(void) \
{ \
return &des_##mode; \
}
PROV_CIPHER_HW_des_mode(ecb)
PROV_CIPHER_HW_des_mode(cbc)
PROV_CIPHER_HW_des_mode(ofb64)
PROV_CIPHER_HW_des_mode(cfb64)
PROV_CIPHER_HW_des_mode(cfb1)
PROV_CIPHER_HW_des_mode(cfb8)
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