pineapple-src/externals/libressl/crypto/cmac/cm_pmeth.c
2020-12-28 15:15:37 +00:00

213 lines
5.5 KiB
C
Executable file

/* $OpenBSD: cm_pmeth.c,v 1.8 2014/07/11 08:44:48 jsing Exp $ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project 2010.
*/
/* ====================================================================
* 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.
*
* 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.
* ====================================================================
*/
#include <stdio.h>
#include <string.h>
#include <openssl/cmac.h>
#include <openssl/evp.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include "evp_locl.h"
/* The context structure and "key" is simply a CMAC_CTX */
static int
pkey_cmac_init(EVP_PKEY_CTX *ctx)
{
ctx->data = CMAC_CTX_new();
if (!ctx->data)
return 0;
ctx->keygen_info_count = 0;
return 1;
}
static int
pkey_cmac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
{
if (!pkey_cmac_init(dst))
return 0;
if (!CMAC_CTX_copy(dst->data, src->data))
return 0;
return 1;
}
static void
pkey_cmac_cleanup(EVP_PKEY_CTX *ctx)
{
CMAC_CTX_free(ctx->data);
}
static int
pkey_cmac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
{
CMAC_CTX *cmkey = CMAC_CTX_new();
CMAC_CTX *cmctx = ctx->data;
if (!cmkey)
return 0;
if (!CMAC_CTX_copy(cmkey, cmctx)) {
CMAC_CTX_free(cmkey);
return 0;
}
EVP_PKEY_assign(pkey, EVP_PKEY_CMAC, cmkey);
return 1;
}
static int
int_update(EVP_MD_CTX *ctx, const void *data, size_t count)
{
if (!CMAC_Update(ctx->pctx->data, data, count))
return 0;
return 1;
}
static int
cmac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
{
EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_NO_INIT);
mctx->update = int_update;
return 1;
}
static int
cmac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
EVP_MD_CTX *mctx)
{
return CMAC_Final(ctx->data, sig, siglen);
}
static int
pkey_cmac_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
{
CMAC_CTX *cmctx = ctx->data;
switch (type) {
case EVP_PKEY_CTRL_SET_MAC_KEY:
if (!p2 || p1 < 0)
return 0;
if (!CMAC_Init(cmctx, p2, p1, NULL, NULL))
return 0;
break;
case EVP_PKEY_CTRL_CIPHER:
if (!CMAC_Init(cmctx, NULL, 0, p2, ctx->engine))
return 0;
break;
case EVP_PKEY_CTRL_MD:
if (ctx->pkey && !CMAC_CTX_copy(ctx->data,
(CMAC_CTX *)ctx->pkey->pkey.ptr))
return 0;
if (!CMAC_Init(cmctx, NULL, 0, NULL, NULL))
return 0;
break;
default:
return -2;
}
return 1;
}
static int
pkey_cmac_ctrl_str(EVP_PKEY_CTX *ctx, const char *type, const char *value)
{
if (!value)
return 0;
if (!strcmp(type, "key")) {
void *p = (void *)value;
return pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY,
strlen(p), p);
}
if (!strcmp(type, "cipher")) {
const EVP_CIPHER *c;
c = EVP_get_cipherbyname(value);
if (!c)
return 0;
return pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_CIPHER, -1, (void *)c);
}
if (!strcmp(type, "hexkey")) {
unsigned char *key;
int r;
long keylen;
key = string_to_hex(value, &keylen);
if (!key)
return 0;
r = pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, keylen, key);
free(key);
return r;
}
return -2;
}
const EVP_PKEY_METHOD cmac_pkey_meth = {
.pkey_id = EVP_PKEY_CMAC,
.flags = EVP_PKEY_FLAG_SIGCTX_CUSTOM,
.init = pkey_cmac_init,
.copy = pkey_cmac_copy,
.cleanup = pkey_cmac_cleanup,
.keygen = pkey_cmac_keygen,
.signctx_init = cmac_signctx_init,
.signctx = cmac_signctx,
.ctrl = pkey_cmac_ctrl,
.ctrl_str = pkey_cmac_ctrl_str
};