mirror of
https://github.com/openssl/openssl.git
synced 2024-12-27 06:21:43 +08:00
4e720f12fa
These are both false positives since the `d` array is initialised by the `DES_cfb_encrypt()` call via the `l2cn` macro. Rather than ignoring them and having them crop up later, it's easier to just add an initialiser. Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com> Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com> (Merged from https://github.com/openssl/openssl/pull/17894)
248 lines
8.1 KiB
C
248 lines
8.1 KiB
C
/*
|
|
* 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 <stdio.h>
|
|
#include "internal/cryptlib.h"
|
|
#ifndef OPENSSL_NO_DES
|
|
# include <openssl/evp.h>
|
|
# include <openssl/objects.h>
|
|
# include "crypto/evp.h"
|
|
# include <openssl/des.h>
|
|
# include <openssl/rand.h>
|
|
# include "evp_local.h"
|
|
|
|
typedef struct {
|
|
union {
|
|
OSSL_UNION_ALIGN;
|
|
DES_key_schedule ks;
|
|
} ks;
|
|
union {
|
|
void (*cbc) (const void *, void *, size_t,
|
|
const DES_key_schedule *, unsigned char *);
|
|
} stream;
|
|
} EVP_DES_KEY;
|
|
|
|
# if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__))
|
|
/* ----------^^^ this is not a typo, just a way to detect that
|
|
* assembler support was in general requested... */
|
|
# include "crypto/sparc_arch.h"
|
|
|
|
# define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES)
|
|
|
|
void des_t4_key_expand(const void *key, DES_key_schedule *ks);
|
|
void des_t4_cbc_encrypt(const void *inp, void *out, size_t len,
|
|
const DES_key_schedule *ks, unsigned char iv[8]);
|
|
void des_t4_cbc_decrypt(const void *inp, void *out, size_t len,
|
|
const DES_key_schedule *ks, unsigned char iv[8]);
|
|
# endif
|
|
|
|
static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
|
|
const unsigned char *iv, int enc);
|
|
static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
|
|
|
|
/*
|
|
* Because of various casts and different names can't use
|
|
* IMPLEMENT_BLOCK_CIPHER
|
|
*/
|
|
|
|
static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
|
|
const unsigned char *in, size_t inl)
|
|
{
|
|
BLOCK_CIPHER_ecb_loop()
|
|
DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i),
|
|
EVP_CIPHER_CTX_get_cipher_data(ctx),
|
|
EVP_CIPHER_CTX_is_encrypting(ctx));
|
|
return 1;
|
|
}
|
|
|
|
static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
|
|
const unsigned char *in, size_t inl)
|
|
{
|
|
while (inl >= EVP_MAXCHUNK) {
|
|
int num = EVP_CIPHER_CTX_get_num(ctx);
|
|
DES_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK,
|
|
EVP_CIPHER_CTX_get_cipher_data(ctx),
|
|
(DES_cblock *)ctx->iv, &num);
|
|
EVP_CIPHER_CTX_set_num(ctx, num);
|
|
inl -= EVP_MAXCHUNK;
|
|
in += EVP_MAXCHUNK;
|
|
out += EVP_MAXCHUNK;
|
|
}
|
|
if (inl) {
|
|
int num = EVP_CIPHER_CTX_get_num(ctx);
|
|
DES_ofb64_encrypt(in, out, (long)inl,
|
|
EVP_CIPHER_CTX_get_cipher_data(ctx),
|
|
(DES_cblock *)ctx->iv, &num);
|
|
EVP_CIPHER_CTX_set_num(ctx, num);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
|
|
const unsigned char *in, size_t inl)
|
|
{
|
|
EVP_DES_KEY *dat = (EVP_DES_KEY *) EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
|
|
if (dat->stream.cbc != NULL) {
|
|
(*dat->stream.cbc) (in, out, inl, &dat->ks.ks, ctx->iv);
|
|
return 1;
|
|
}
|
|
while (inl >= EVP_MAXCHUNK) {
|
|
DES_ncbc_encrypt(in, out, (long)EVP_MAXCHUNK,
|
|
EVP_CIPHER_CTX_get_cipher_data(ctx),
|
|
(DES_cblock *)ctx->iv,
|
|
EVP_CIPHER_CTX_is_encrypting(ctx));
|
|
inl -= EVP_MAXCHUNK;
|
|
in += EVP_MAXCHUNK;
|
|
out += EVP_MAXCHUNK;
|
|
}
|
|
if (inl)
|
|
DES_ncbc_encrypt(in, out, (long)inl,
|
|
EVP_CIPHER_CTX_get_cipher_data(ctx),
|
|
(DES_cblock *)ctx->iv,
|
|
EVP_CIPHER_CTX_is_encrypting(ctx));
|
|
return 1;
|
|
}
|
|
|
|
static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
|
|
const unsigned char *in, size_t inl)
|
|
{
|
|
while (inl >= EVP_MAXCHUNK) {
|
|
int num = EVP_CIPHER_CTX_get_num(ctx);
|
|
DES_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK,
|
|
EVP_CIPHER_CTX_get_cipher_data(ctx),
|
|
(DES_cblock *)ctx->iv, &num,
|
|
EVP_CIPHER_CTX_is_encrypting(ctx));
|
|
EVP_CIPHER_CTX_set_num(ctx, num);
|
|
inl -= EVP_MAXCHUNK;
|
|
in += EVP_MAXCHUNK;
|
|
out += EVP_MAXCHUNK;
|
|
}
|
|
if (inl) {
|
|
int num = EVP_CIPHER_CTX_get_num(ctx);
|
|
DES_cfb64_encrypt(in, out, (long)inl,
|
|
EVP_CIPHER_CTX_get_cipher_data(ctx),
|
|
(DES_cblock *)ctx->iv, &num,
|
|
EVP_CIPHER_CTX_is_encrypting(ctx));
|
|
EVP_CIPHER_CTX_set_num(ctx, 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 des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
|
|
const unsigned char *in, size_t inl)
|
|
{
|
|
size_t n, chunk = EVP_MAXCHUNK / 8;
|
|
unsigned char c[1];
|
|
unsigned char d[1] = { 0 }; /* Appease Coverity */
|
|
|
|
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, EVP_CIPHER_CTX_get_cipher_data(ctx),
|
|
(DES_cblock *)ctx->iv,
|
|
EVP_CIPHER_CTX_is_encrypting(ctx));
|
|
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 des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
|
|
const unsigned char *in, size_t inl)
|
|
{
|
|
while (inl >= EVP_MAXCHUNK) {
|
|
DES_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK,
|
|
EVP_CIPHER_CTX_get_cipher_data(ctx),
|
|
(DES_cblock *)ctx->iv,
|
|
EVP_CIPHER_CTX_is_encrypting(ctx));
|
|
inl -= EVP_MAXCHUNK;
|
|
in += EVP_MAXCHUNK;
|
|
out += EVP_MAXCHUNK;
|
|
}
|
|
if (inl)
|
|
DES_cfb_encrypt(in, out, 8, (long)inl,
|
|
EVP_CIPHER_CTX_get_cipher_data(ctx),
|
|
(DES_cblock *)ctx->iv,
|
|
EVP_CIPHER_CTX_is_encrypting(ctx));
|
|
return 1;
|
|
}
|
|
|
|
BLOCK_CIPHER_defs(des, EVP_DES_KEY, NID_des, 8, 8, 8, 64,
|
|
EVP_CIPH_RAND_KEY, des_init_key, NULL,
|
|
EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
|
|
|
|
BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 1,
|
|
EVP_CIPH_RAND_KEY, des_init_key, NULL,
|
|
EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
|
|
|
|
BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 8,
|
|
EVP_CIPH_RAND_KEY, des_init_key, NULL,
|
|
EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
|
|
|
|
static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
|
|
const unsigned char *iv, int enc)
|
|
{
|
|
DES_cblock *deskey = (DES_cblock *)key;
|
|
EVP_DES_KEY *dat = (EVP_DES_KEY *) EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
|
|
dat->stream.cbc = NULL;
|
|
# if defined(SPARC_DES_CAPABLE)
|
|
if (SPARC_DES_CAPABLE) {
|
|
int mode = EVP_CIPHER_CTX_get_mode(ctx);
|
|
|
|
if (mode == EVP_CIPH_CBC_MODE) {
|
|
des_t4_key_expand(key, &dat->ks.ks);
|
|
dat->stream.cbc = enc ? des_t4_cbc_encrypt : des_t4_cbc_decrypt;
|
|
return 1;
|
|
}
|
|
}
|
|
# endif
|
|
DES_set_key_unchecked(deskey, EVP_CIPHER_CTX_get_cipher_data(ctx));
|
|
return 1;
|
|
}
|
|
|
|
static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
|
|
{
|
|
|
|
switch (type) {
|
|
case EVP_CTRL_RAND_KEY:
|
|
if (RAND_priv_bytes(ptr, 8) <= 0)
|
|
return 0;
|
|
DES_set_odd_parity((DES_cblock *)ptr);
|
|
return 1;
|
|
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
#endif
|