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https://github.com/guanzhi/GmSSL.git
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add sms4 module
This commit is contained in:
Zhi Guan
188
crypto/evp/e_sms4_wrap.c
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188
crypto/evp/e_sms4_wrap.c
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@@ -0,0 +1,188 @@
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/* ====================================================================
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* Copyright (c) 2014 - 2017 The GmSSL Project. All rights reserved.
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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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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the GmSSL Project.
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* (http://gmssl.org/)"
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*
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* 4. The name "GmSSL Project" must not be used to endorse or promote
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* products derived from this software without prior written
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* permission. For written permission, please contact
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* guanzhi1980@gmail.com.
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*
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* 5. Products derived from this software may not be called "GmSSL"
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* nor may "GmSSL" appear in their names without prior written
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* permission of the GmSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the GmSSL Project
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* (http://gmssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE GmSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE GmSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*/
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/*
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* Copyright 2001-2016 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 <openssl/evp.h>
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#include <openssl/crypto.h>
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#include <openssl/objects.h>
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#include "evp_locl.h"
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# include "internal/evp_int.h"
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#include "../modes/modes_lcl.h"
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#ifndef OPENSSL_NO_SMS4
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# include <openssl/sms4.h>
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typedef struct {
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union {
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double align;
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sms4_key_t ks;
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} ks;
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/* Indicates if IV has been set */
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unsigned char *iv;
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} EVP_SMS4_WRAP_CTX;
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static int sms4_wrap_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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EVP_SMS4_WRAP_CTX *wctx = EVP_C_DATA(EVP_SMS4_WRAP_CTX,ctx);
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if (!iv && !key)
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return 1;
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if (key) {
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if (EVP_CIPHER_CTX_encrypting(ctx))
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sms4_set_encrypt_key(&wctx->ks.ks, key);
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else
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sms4_set_decrypt_key(&wctx->ks.ks, key);
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if (!iv)
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wctx->iv = NULL;
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}
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if (iv) {
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memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, EVP_CIPHER_CTX_iv_length(ctx));
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wctx->iv = EVP_CIPHER_CTX_iv_noconst(ctx);
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}
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return 1;
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}
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static int sms4_wrap_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inlen)
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{
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EVP_SMS4_WRAP_CTX *wctx = EVP_C_DATA(EVP_SMS4_WRAP_CTX,ctx);
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size_t rv;
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/* SMS4 wrap with padding has IV length of 4, without padding 8 */
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int pad = EVP_CIPHER_CTX_iv_length(ctx) == 4;
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/* No final operation so always return zero length */
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if (!in)
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return 0;
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/* Input length must always be non-zero */
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if (!inlen)
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return -1;
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/* If decrypting need at least 16 bytes and multiple of 8 */
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if (!EVP_CIPHER_CTX_encrypting(ctx) && (inlen < 16 || inlen & 0x7))
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return -1;
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/* If not padding input must be multiple of 8 */
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if (!pad && inlen & 0x7)
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return -1;
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if (!out) {
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if (EVP_CIPHER_CTX_encrypting(ctx)) {
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/* If padding round up to multiple of 8 */
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if (pad)
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inlen = (inlen + 7) / 8 * 8;
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/* 8 byte prefix */
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return inlen + 8;
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} else {
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/*
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* If not padding output will be exactly 8 bytes smaller than
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* input. If padding it will be at least 8 bytes smaller but we
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* don't know how much.
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*/
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return inlen - 8;
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}
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}
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if (pad) {
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if (EVP_CIPHER_CTX_encrypting(ctx))
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rv = CRYPTO_128_wrap_pad(&wctx->ks.ks, wctx->iv,
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out, in, inlen,
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(block128_f)sms4_encrypt);
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else
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rv = CRYPTO_128_unwrap_pad(&wctx->ks.ks, wctx->iv,
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out, in, inlen,
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(block128_f)sms4_encrypt);
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} else {
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if (EVP_CIPHER_CTX_encrypting(ctx))
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rv = CRYPTO_128_wrap(&wctx->ks.ks, wctx->iv,
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out, in, inlen, (block128_f)sms4_encrypt);
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else
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rv = CRYPTO_128_unwrap(&wctx->ks.ks, wctx->iv,
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out, in, inlen, (block128_f)sms4_encrypt);
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}
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return rv ? (int)rv : -1;
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}
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#define SMS4_WRAP_FLAGS (EVP_CIPH_WRAP_MODE \
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| EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \
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| EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_FLAG_DEFAULT_ASN1)
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static const EVP_CIPHER sms4_wrap = {
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NID_sms4_wrap,
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8, 16, 8, SMS4_WRAP_FLAGS,
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sms4_wrap_init_key, sms4_wrap_cipher,
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NULL,
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sizeof(EVP_SMS4_WRAP_CTX),
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NULL, NULL, NULL, NULL
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};
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const EVP_CIPHER *EVP_sms4_wrap(void)
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{
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return &sms4_wrap;
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}
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static const EVP_CIPHER sms4_wrap_pad = {
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NID_sms4_wrap_pad,
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8, 16, 4, SMS4_WRAP_FLAGS,
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sms4_wrap_init_key, sms4_wrap_cipher,
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NULL,
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sizeof(EVP_SMS4_WRAP_CTX),
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NULL, NULL, NULL, NULL
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};
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const EVP_CIPHER *EVP_sms4_wrap_pad(void)
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{
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return &sms4_wrap_pad;
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}
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#endif /* OPENSSL_NO_SMS4 */
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