269 lines
9.7 KiB
C
269 lines
9.7 KiB
C
/* crypto/evp/e_des.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include "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 "evp_locl.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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ctx->cipher_data, ctx->encrypt);
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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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DES_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data,
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(DES_cblock *)ctx->iv, &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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DES_ofb64_encrypt(in, out, (long)inl, ctx->cipher_data,
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(DES_cblock *)ctx->iv, &ctx->num);
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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 *) ctx->cipher_data;
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if (dat->stream.cbc != NULL) {
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(*dat->stream.cbc) (in, out, inl, &dat->ks.ks, ctx->iv);
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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, ctx->cipher_data,
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(DES_cblock *)ctx->iv, ctx->encrypt);
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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, ctx->cipher_data,
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(DES_cblock *)ctx->iv, ctx->encrypt);
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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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DES_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data,
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(DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
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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_cfb64_encrypt(in, out, (long)inl, ctx->cipher_data,
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(DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
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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, ctx->cipher_data,
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(DES_cblock *)ctx->iv, ctx->encrypt);
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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, ctx->cipher_data,
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(DES_cblock *)ctx->iv, ctx->encrypt);
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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, ctx->cipher_data,
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(DES_cblock *)ctx->iv, ctx->encrypt);
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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 *) ctx->cipher_data;
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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 = ctx->cipher->flags & EVP_CIPH_MODE;
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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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# ifdef EVP_CHECK_DES_KEY
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if (DES_set_key_checked(deskey, dat->ks.ks) != 0)
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return 0;
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# else
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DES_set_key_unchecked(deskey, ctx->cipher_data);
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# endif
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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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