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add sms4 module
This commit is contained in:
Zhi Guan
340
crypto/evp/e_sms4_ccm.c
Normal file
340
crypto/evp/e_sms4_ccm.c
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@@ -0,0 +1,340 @@
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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; /* SMS4 key schedule to use */
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int key_set; /* Set if key initialised */
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int iv_set; /* Set if an iv is set */
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int tag_set; /* Set if tag is valid */
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int len_set; /* Set if message length set */
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int L, M; /* L and M parameters from RFC3610 */
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int tls_aad_len; /* TLS AAD length */
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CCM128_CONTEXT ccm;
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ccm128_f str;
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} EVP_SMS4_CCM_CTX;
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static int sms4_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
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{
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EVP_SMS4_CCM_CTX *cctx = EVP_C_DATA(EVP_SMS4_CCM_CTX,c);
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switch (type) {
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case EVP_CTRL_INIT:
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cctx->key_set = 0;
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cctx->iv_set = 0;
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cctx->L = 8;
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cctx->M = 12;
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cctx->tag_set = 0;
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cctx->len_set = 0;
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cctx->tls_aad_len = -1;
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return 1;
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case EVP_CTRL_AEAD_TLS1_AAD:
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/* Save the AAD for later use */
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if (arg != EVP_AEAD_TLS1_AAD_LEN)
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return 0;
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memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
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cctx->tls_aad_len = arg;
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{
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uint16_t len =
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EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8
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| EVP_CIPHER_CTX_buf_noconst(c)[arg - 1];
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/* Correct length for explicit IV */
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len -= EVP_CCM_TLS_EXPLICIT_IV_LEN;
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/* If decrypting correct for tag too */
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if (!EVP_CIPHER_CTX_encrypting(c))
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len -= cctx->M;
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EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] = len >> 8;
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EVP_CIPHER_CTX_buf_noconst(c)[arg - 1] = len & 0xff;
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}
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/* Extra padding: tag appended to record */
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return cctx->M;
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case EVP_CTRL_CCM_SET_IV_FIXED:
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/* Sanity check length */
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if (arg != EVP_CCM_TLS_FIXED_IV_LEN)
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return 0;
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/* Just copy to first part of IV */
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memcpy(EVP_CIPHER_CTX_iv_noconst(c), ptr, arg);
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return 1;
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case EVP_CTRL_AEAD_SET_IVLEN:
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arg = 15 - arg;
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case EVP_CTRL_CCM_SET_L:
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if (arg < 2 || arg > 8)
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return 0;
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cctx->L = arg;
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return 1;
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case EVP_CTRL_AEAD_SET_TAG:
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if ((arg & 1) || arg < 4 || arg > 16)
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return 0;
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if (EVP_CIPHER_CTX_encrypting(c) && ptr)
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return 0;
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if (ptr) {
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cctx->tag_set = 1;
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memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
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}
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cctx->M = arg;
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return 1;
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case EVP_CTRL_AEAD_GET_TAG:
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if (!EVP_CIPHER_CTX_encrypting(c) || !cctx->tag_set)
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return 0;
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if (!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg))
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return 0;
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cctx->tag_set = 0;
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cctx->iv_set = 0;
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cctx->len_set = 0;
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return 1;
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case EVP_CTRL_COPY:
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{
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EVP_CIPHER_CTX *out = ptr;
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EVP_SMS4_CCM_CTX *cctx_out = EVP_C_DATA(EVP_SMS4_CCM_CTX,out);
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if (cctx->ccm.key) {
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if (cctx->ccm.key != &cctx->ks)
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return 0;
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cctx_out->ccm.key = &cctx_out->ks;
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}
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return 1;
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}
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default:
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return -1;
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}
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}
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static int sms4_ccm_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_CCM_CTX *cctx = EVP_C_DATA(EVP_SMS4_CCM_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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do {
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sms4_set_encrypt_key(&cctx->ks.ks, key);
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CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
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&cctx->ks, (block128_f) sms4_encrypt);
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cctx->str = NULL;
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cctx->key_set = 1;
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} while (0);
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if (iv) {
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memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, 15 - cctx->L);
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cctx->iv_set = 1;
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}
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return 1;
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}
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static int sms4_ccm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t len)
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{
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EVP_SMS4_CCM_CTX *cctx = EVP_C_DATA(EVP_SMS4_CCM_CTX,ctx);
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CCM128_CONTEXT *ccm = &cctx->ccm;
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/* Encrypt/decrypt must be performed in place */
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if (out != in || len < (EVP_CCM_TLS_EXPLICIT_IV_LEN + (size_t)cctx->M))
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return -1;
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/* If encrypting set explicit IV from sequence number (start of AAD) */
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if (EVP_CIPHER_CTX_encrypting(ctx))
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memcpy(out, EVP_CIPHER_CTX_buf_noconst(ctx),
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EVP_CCM_TLS_EXPLICIT_IV_LEN);
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/* Get rest of IV from explicit IV */
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memcpy(EVP_CIPHER_CTX_iv_noconst(ctx) + EVP_CCM_TLS_FIXED_IV_LEN, in,
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EVP_CCM_TLS_EXPLICIT_IV_LEN);
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/* Correct length value */
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len -= EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M;
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if (CRYPTO_ccm128_setiv(ccm, EVP_CIPHER_CTX_iv_noconst(ctx), 15 - cctx->L,
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len))
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return -1;
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/* Use saved AAD */
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CRYPTO_ccm128_aad(ccm, EVP_CIPHER_CTX_buf_noconst(ctx), cctx->tls_aad_len);
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/* Fix buffer to point to payload */
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in += EVP_CCM_TLS_EXPLICIT_IV_LEN;
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out += EVP_CCM_TLS_EXPLICIT_IV_LEN;
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if (EVP_CIPHER_CTX_encrypting(ctx)) {
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if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len,
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cctx->str) :
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CRYPTO_ccm128_encrypt(ccm, in, out, len))
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return -1;
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if (!CRYPTO_ccm128_tag(ccm, out + len, cctx->M))
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return -1;
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return len + EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M;
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} else {
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if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len,
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cctx->str) :
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!CRYPTO_ccm128_decrypt(ccm, in, out, len)) {
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unsigned char tag[16];
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if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) {
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if (!CRYPTO_memcmp(tag, in + len, cctx->M))
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return len;
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}
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}
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OPENSSL_cleanse(out, len);
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return -1;
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}
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}
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static int sms4_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t len)
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{
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EVP_SMS4_CCM_CTX *cctx = EVP_C_DATA(EVP_SMS4_CCM_CTX,ctx);
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CCM128_CONTEXT *ccm = &cctx->ccm;
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/* If not set up, return error */
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if (!cctx->key_set)
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return -1;
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if (cctx->tls_aad_len >= 0)
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return sms4_ccm_tls_cipher(ctx, out, in, len);
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if (!cctx->iv_set)
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return -1;
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if (!EVP_CIPHER_CTX_encrypting(ctx) && !cctx->tag_set)
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return -1;
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if (!out) {
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if (!in) {
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if (CRYPTO_ccm128_setiv(ccm, EVP_CIPHER_CTX_iv_noconst(ctx),
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15 - cctx->L, len))
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return -1;
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cctx->len_set = 1;
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return len;
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}
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/* If have AAD need message length */
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if (!cctx->len_set && len)
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return -1;
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CRYPTO_ccm128_aad(ccm, in, len);
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return len;
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}
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/* EVP_*Final() doesn't return any data */
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if (!in)
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return 0;
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/* If not set length yet do it */
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if (!cctx->len_set) {
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if (CRYPTO_ccm128_setiv(ccm, EVP_CIPHER_CTX_iv_noconst(ctx),
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15 - cctx->L, len))
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return -1;
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cctx->len_set = 1;
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}
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if (EVP_CIPHER_CTX_encrypting(ctx)) {
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if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len,
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cctx->str) :
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CRYPTO_ccm128_encrypt(ccm, in, out, len))
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return -1;
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cctx->tag_set = 1;
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return len;
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} else {
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int rv = -1;
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if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len,
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cctx->str) :
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!CRYPTO_ccm128_decrypt(ccm, in, out, len)) {
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unsigned char tag[16];
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if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) {
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if (!CRYPTO_memcmp(tag, EVP_CIPHER_CTX_buf_noconst(ctx),
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cctx->M))
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rv = len;
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}
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}
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if (rv == -1)
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OPENSSL_cleanse(out, len);
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cctx->iv_set = 0;
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cctx->tag_set = 0;
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cctx->len_set = 0;
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return rv;
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}
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}
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#define SMS4_CCM_BLOCK_SIZE 1
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#define SMS4_CCM_IV_LENGTH 12
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#define SMS4_CCM_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 \
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| EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \
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| EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \
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| EVP_CIPH_CUSTOM_COPY \
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| EVP_CIPH_FLAG_AEAD_CIPHER)
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static const EVP_CIPHER sms4_ccm = {
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NID_sms4_ccm,
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SMS4_CCM_BLOCK_SIZE,
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SMS4_KEY_LENGTH,
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SMS4_CCM_IV_LENGTH,
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SMS4_CCM_FLAGS,
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sms4_ccm_init_key,
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sms4_ccm_cipher,
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NULL,
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sizeof(EVP_SMS4_CCM_CTX),
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NULL, NULL, sms4_ccm_ctrl, NULL
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};
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const EVP_CIPHER *EVP_sms4_ccm(void) {
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return &sms4_ccm;
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}
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#endif /* OPENSSL_NO_SMS4 */
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