/*
- * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
- * project.
- */
-/* ====================================================================
- * Copyright (c) 2010 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * licensing@OpenSSL.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
+ * Copyright 2010-2021 The OpenSSL Project Authors. All Rights Reserved.
*
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
+ * 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
+ */
+
+/*
+ * CMAC low level APIs are deprecated for public use, but still ok for internal
+ * use.
*/
+#include "internal/deprecated.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "internal/cryptlib.h"
#include <openssl/cmac.h>
+#include <openssl/err.h>
struct CMAC_CTX_st {
/* Cipher context to use */
{
CMAC_CTX *ctx;
- ctx = OPENSSL_malloc(sizeof(*ctx));
- if (ctx == NULL)
+ if ((ctx = OPENSSL_malloc(sizeof(*ctx))) == NULL)
return NULL;
ctx->cctx = EVP_CIPHER_CTX_new();
if (ctx->cctx == NULL) {
void CMAC_CTX_cleanup(CMAC_CTX *ctx)
{
- EVP_CIPHER_CTX_free(ctx->cctx);
+ EVP_CIPHER_CTX_reset(ctx->cctx);
OPENSSL_cleanse(ctx->tbl, EVP_MAX_BLOCK_LENGTH);
OPENSSL_cleanse(ctx->k1, EVP_MAX_BLOCK_LENGTH);
OPENSSL_cleanse(ctx->k2, EVP_MAX_BLOCK_LENGTH);
if (!ctx)
return;
CMAC_CTX_cleanup(ctx);
+ EVP_CIPHER_CTX_free(ctx->cctx);
OPENSSL_free(ctx);
}
int CMAC_CTX_copy(CMAC_CTX *out, const CMAC_CTX *in)
{
int bl;
+
if (in->nlast_block == -1)
return 0;
+ if ((bl = EVP_CIPHER_CTX_get_block_size(in->cctx)) < 0)
+ return 0;
if (!EVP_CIPHER_CTX_copy(out->cctx, in->cctx))
return 0;
- bl = EVP_CIPHER_CTX_block_size(in->cctx);
memcpy(out->k1, in->k1, bl);
memcpy(out->k2, in->k2, bl);
memcpy(out->tbl, in->tbl, bl);
const EVP_CIPHER *cipher, ENGINE *impl)
{
static const unsigned char zero_iv[EVP_MAX_BLOCK_LENGTH] = { 0 };
+
/* All zeros means restart */
if (!key && !cipher && !impl && keylen == 0) {
/* Not initialised */
return 0;
if (!EVP_EncryptInit_ex(ctx->cctx, NULL, NULL, NULL, zero_iv))
return 0;
- memset(ctx->tbl, 0, EVP_CIPHER_CTX_block_size(ctx->cctx));
+ memset(ctx->tbl, 0, EVP_CIPHER_CTX_get_block_size(ctx->cctx));
ctx->nlast_block = 0;
return 1;
}
- /* Initialiase context */
- if (cipher && !EVP_EncryptInit_ex(ctx->cctx, cipher, impl, NULL, NULL))
- return 0;
+ /* Initialise context */
+ if (cipher != NULL) {
+ /* Ensure we can't use this ctx until we also have a key */
+ ctx->nlast_block = -1;
+ if (!EVP_EncryptInit_ex(ctx->cctx, cipher, impl, NULL, NULL))
+ return 0;
+ }
/* Non-NULL key means initialisation complete */
- if (key) {
+ if (key != NULL) {
int bl;
- if (!EVP_CIPHER_CTX_cipher(ctx->cctx))
+
+ /* If anything fails then ensure we can't use this ctx */
+ ctx->nlast_block = -1;
+ if (EVP_CIPHER_CTX_get0_cipher(ctx->cctx) == NULL)
return 0;
- if (!EVP_CIPHER_CTX_set_key_length(ctx->cctx, keylen))
+ if (EVP_CIPHER_CTX_set_key_length(ctx->cctx, keylen) <= 0)
return 0;
if (!EVP_EncryptInit_ex(ctx->cctx, NULL, NULL, key, zero_iv))
return 0;
- bl = EVP_CIPHER_CTX_block_size(ctx->cctx);
- if (!EVP_Cipher(ctx->cctx, ctx->tbl, zero_iv, bl))
+ if ((bl = EVP_CIPHER_CTX_get_block_size(ctx->cctx)) < 0)
+ return 0;
+ if (EVP_Cipher(ctx->cctx, ctx->tbl, zero_iv, bl) <= 0)
return 0;
make_kn(ctx->k1, ctx->tbl, bl);
make_kn(ctx->k2, ctx->k1, bl);
int CMAC_Update(CMAC_CTX *ctx, const void *in, size_t dlen)
{
const unsigned char *data = in;
- size_t bl;
+ int bl;
+
if (ctx->nlast_block == -1)
return 0;
if (dlen == 0)
return 1;
- bl = EVP_CIPHER_CTX_block_size(ctx->cctx);
+ if ((bl = EVP_CIPHER_CTX_get_block_size(ctx->cctx)) < 0)
+ return 0;
/* Copy into partial block if we need to */
if (ctx->nlast_block > 0) {
size_t nleft;
+
nleft = bl - ctx->nlast_block;
if (dlen < nleft)
nleft = dlen;
return 1;
data += nleft;
/* Else not final block so encrypt it */
- if (!EVP_Cipher(ctx->cctx, ctx->tbl, ctx->last_block, bl))
+ if (EVP_Cipher(ctx->cctx, ctx->tbl, ctx->last_block, bl) <= 0)
return 0;
}
/* Encrypt all but one of the complete blocks left */
- while (dlen > bl) {
- if (!EVP_Cipher(ctx->cctx, ctx->tbl, data, bl))
+ while (dlen > (size_t)bl) {
+ if (EVP_Cipher(ctx->cctx, ctx->tbl, data, bl) <= 0)
return 0;
dlen -= bl;
data += bl;
int CMAC_Final(CMAC_CTX *ctx, unsigned char *out, size_t *poutlen)
{
int i, bl, lb;
+
if (ctx->nlast_block == -1)
return 0;
- bl = EVP_CIPHER_CTX_block_size(ctx->cctx);
- *poutlen = (size_t)bl;
+ if ((bl = EVP_CIPHER_CTX_get_block_size(ctx->cctx)) < 0)
+ return 0;
+ if (poutlen != NULL)
+ *poutlen = (size_t)bl;
if (!out)
return 1;
lb = ctx->nlast_block;
for (i = 0; i < bl; i++)
out[i] = ctx->last_block[i] ^ ctx->k2[i];
}
- if (!EVP_Cipher(ctx->cctx, out, out, bl)) {
+ if (EVP_Cipher(ctx->cctx, out, out, bl) <= 0) {
OPENSSL_cleanse(out, bl);
return 0;
}
if (ctx->nlast_block == -1)
return 0;
/*
- * The buffer "tbl" containes the last fully encrypted block which is the
+ * The buffer "tbl" contains the last fully encrypted block which is the
* last IV (or all zeroes if no last encrypted block). The last block has
- * not been modified since CMAC_final(). So reinitliasing using the last
+ * not been modified since CMAC_final(). So reinitialising using the last
* decrypted block will allow CMAC to continue after calling
* CMAC_Final().
*/
projects / openssl.git / blobdiff