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243 lines
8.1 KiB
C
243 lines
8.1 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_DES
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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/des.h>
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# include <openssl/rand.h>
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typedef struct {
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union {
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double align;
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DES_key_schedule ks;
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} ks;
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union {
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void (*cbc) (const void *, void *, size_t,
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const DES_key_schedule *, unsigned char *);
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} stream;
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} EVP_DES_KEY;
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# if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__))
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/* ----------^^^ this is not a typo, just a way to detect that
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* assembler support was in general requested... */
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# include "sparc_arch.h"
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extern unsigned int OPENSSL_sparcv9cap_P[];
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# define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES)
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void des_t4_key_expand(const void *key, DES_key_schedule *ks);
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void des_t4_cbc_encrypt(const void *inp, void *out, size_t len,
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const DES_key_schedule *ks, unsigned char iv[8]);
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void des_t4_cbc_decrypt(const void *inp, void *out, size_t len,
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const DES_key_schedule *ks, unsigned char iv[8]);
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# endif
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static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc);
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static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
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/*
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* Because of various casts and different names can't use
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* IMPLEMENT_BLOCK_CIPHER
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*/
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static int des_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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DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i),
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EVP_CIPHER_CTX_get_cipher_data(ctx),
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EVP_CIPHER_CTX_encrypting(ctx));
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return 1;
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}
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static int des_ofb_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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while (inl >= EVP_MAXCHUNK) {
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int num = EVP_CIPHER_CTX_num(ctx);
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DES_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK,
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EVP_CIPHER_CTX_get_cipher_data(ctx),
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(DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num);
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EVP_CIPHER_CTX_set_num(ctx, num);
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inl -= EVP_MAXCHUNK;
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in += EVP_MAXCHUNK;
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out += EVP_MAXCHUNK;
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}
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if (inl) {
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int num = EVP_CIPHER_CTX_num(ctx);
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DES_ofb64_encrypt(in, out, (long)inl,
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EVP_CIPHER_CTX_get_cipher_data(ctx),
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(DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num);
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EVP_CIPHER_CTX_set_num(ctx, num);
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}
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return 1;
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}
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static int des_cbc_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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EVP_DES_KEY *dat = (EVP_DES_KEY *) EVP_CIPHER_CTX_get_cipher_data(ctx);
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if (dat->stream.cbc != NULL) {
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(*dat->stream.cbc) (in, out, inl, &dat->ks.ks,
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EVP_CIPHER_CTX_iv_noconst(ctx));
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return 1;
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}
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while (inl >= EVP_MAXCHUNK) {
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DES_ncbc_encrypt(in, out, (long)EVP_MAXCHUNK,
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EVP_CIPHER_CTX_get_cipher_data(ctx),
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(DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
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EVP_CIPHER_CTX_encrypting(ctx));
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inl -= EVP_MAXCHUNK;
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in += EVP_MAXCHUNK;
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out += EVP_MAXCHUNK;
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}
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if (inl)
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DES_ncbc_encrypt(in, out, (long)inl,
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EVP_CIPHER_CTX_get_cipher_data(ctx),
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(DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
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EVP_CIPHER_CTX_encrypting(ctx));
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return 1;
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}
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static int des_cfb64_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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while (inl >= EVP_MAXCHUNK) {
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int num = EVP_CIPHER_CTX_num(ctx);
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DES_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK,
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EVP_CIPHER_CTX_get_cipher_data(ctx),
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(DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num,
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EVP_CIPHER_CTX_encrypting(ctx));
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EVP_CIPHER_CTX_set_num(ctx, num);
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inl -= EVP_MAXCHUNK;
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in += EVP_MAXCHUNK;
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out += EVP_MAXCHUNK;
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}
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if (inl) {
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int num = EVP_CIPHER_CTX_num(ctx);
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DES_cfb64_encrypt(in, out, (long)inl,
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EVP_CIPHER_CTX_get_cipher_data(ctx),
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(DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num,
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EVP_CIPHER_CTX_encrypting(ctx));
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EVP_CIPHER_CTX_set_num(ctx, num);
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}
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return 1;
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}
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/*
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* Although we have a CFB-r implementation for DES, it doesn't pack the right
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* way, so wrap it here
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*/
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static int des_cfb1_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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size_t n, chunk = EVP_MAXCHUNK / 8;
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unsigned char c[1], d[1];
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if (inl < chunk)
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chunk = inl;
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while (inl && inl >= chunk) {
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for (n = 0; n < chunk * 8; ++n) {
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c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0;
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DES_cfb_encrypt(c, d, 1, 1, EVP_CIPHER_CTX_get_cipher_data(ctx),
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(DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
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EVP_CIPHER_CTX_encrypting(ctx));
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out[n / 8] =
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(out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) |
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((d[0] & 0x80) >> (unsigned int)(n % 8));
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}
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inl -= chunk;
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in += chunk;
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out += chunk;
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if (inl < chunk)
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chunk = inl;
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}
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return 1;
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}
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static int des_cfb8_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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while (inl >= EVP_MAXCHUNK) {
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DES_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK,
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EVP_CIPHER_CTX_get_cipher_data(ctx),
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(DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
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EVP_CIPHER_CTX_encrypting(ctx));
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inl -= EVP_MAXCHUNK;
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in += EVP_MAXCHUNK;
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out += EVP_MAXCHUNK;
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}
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if (inl)
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DES_cfb_encrypt(in, out, 8, (long)inl,
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EVP_CIPHER_CTX_get_cipher_data(ctx),
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(DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
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EVP_CIPHER_CTX_encrypting(ctx));
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return 1;
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}
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BLOCK_CIPHER_defs(des, EVP_DES_KEY, NID_des, 8, 8, 8, 64,
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EVP_CIPH_RAND_KEY, des_init_key, NULL,
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EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
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BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 1,
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EVP_CIPH_RAND_KEY, des_init_key, NULL,
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EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
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BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 8,
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EVP_CIPH_RAND_KEY, des_init_key, NULL,
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EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
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static int des_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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DES_cblock *deskey = (DES_cblock *)key;
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EVP_DES_KEY *dat = (EVP_DES_KEY *) EVP_CIPHER_CTX_get_cipher_data(ctx);
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dat->stream.cbc = NULL;
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# if defined(SPARC_DES_CAPABLE)
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if (SPARC_DES_CAPABLE) {
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int mode = EVP_CIPHER_CTX_mode(ctx);
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if (mode == EVP_CIPH_CBC_MODE) {
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des_t4_key_expand(key, &dat->ks.ks);
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dat->stream.cbc = enc ? des_t4_cbc_encrypt : des_t4_cbc_decrypt;
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return 1;
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}
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}
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# endif
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DES_set_key_unchecked(deskey, EVP_CIPHER_CTX_get_cipher_data(ctx));
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return 1;
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}
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static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
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{
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switch (type) {
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case EVP_CTRL_RAND_KEY:
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if (RAND_bytes(ptr, 8) <= 0)
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return 0;
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DES_set_odd_parity((DES_cblock *)ptr);
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return 1;
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default:
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return -1;
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}
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}
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#endif
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