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torque
2023-11-06 23:46:37 -08:00
parent e2db88c634
commit 2b68369a2b
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254
crypto/hmac/hm_pmeth.c Normal file
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/* $OpenBSD: hm_pmeth.c,v 1.15 2022/11/26 16:08:53 tb Exp $ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project 2007.
*/
/* ====================================================================
* Copyright (c) 2007 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.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include <stdio.h>
#include <string.h>
#include <openssl/evp.h>
#include <openssl/hmac.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include "evp_local.h"
#include "hmac_local.h"
/* HMAC pkey context structure */
typedef struct {
const EVP_MD *md; /* MD for HMAC use */
ASN1_OCTET_STRING ktmp; /* Temp storage for key */
HMAC_CTX ctx;
} HMAC_PKEY_CTX;
static int
pkey_hmac_init(EVP_PKEY_CTX *ctx)
{
HMAC_PKEY_CTX *hctx;
if ((hctx = calloc(1, sizeof(HMAC_PKEY_CTX))) == NULL)
return 0;
hctx->ktmp.type = V_ASN1_OCTET_STRING;
HMAC_CTX_init(&hctx->ctx);
ctx->data = hctx;
ctx->keygen_info_count = 0;
return 1;
}
static int
pkey_hmac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
{
HMAC_PKEY_CTX *sctx, *dctx;
if (!pkey_hmac_init(dst))
return 0;
sctx = src->data;
dctx = dst->data;
dctx->md = sctx->md;
HMAC_CTX_init(&dctx->ctx);
if (!HMAC_CTX_copy(&dctx->ctx, &sctx->ctx))
return 0;
if (sctx->ktmp.data) {
if (!ASN1_OCTET_STRING_set(&dctx->ktmp, sctx->ktmp.data,
sctx->ktmp.length))
return 0;
}
return 1;
}
static void
pkey_hmac_cleanup(EVP_PKEY_CTX *ctx)
{
HMAC_PKEY_CTX *hctx;
if ((hctx = ctx->data) == NULL)
return;
HMAC_CTX_cleanup(&hctx->ctx);
freezero(hctx->ktmp.data, hctx->ktmp.length);
free(hctx);
}
static int
pkey_hmac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
{
ASN1_OCTET_STRING *hkey = NULL;
HMAC_PKEY_CTX *hctx = ctx->data;
if (!hctx->ktmp.data)
return 0;
hkey = ASN1_OCTET_STRING_dup(&hctx->ktmp);
if (!hkey)
return 0;
EVP_PKEY_assign(pkey, EVP_PKEY_HMAC, hkey);
return 1;
}
static int
int_update(EVP_MD_CTX *ctx, const void *data, size_t count)
{
HMAC_PKEY_CTX *hctx = ctx->pctx->data;
if (!HMAC_Update(&hctx->ctx, data, count))
return 0;
return 1;
}
static int
hmac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
{
HMAC_PKEY_CTX *hctx = ctx->data;
HMAC_CTX_set_flags(&hctx->ctx, mctx->flags & ~EVP_MD_CTX_FLAG_NO_INIT);
EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_NO_INIT);
mctx->update = int_update;
return 1;
}
static int
hmac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
EVP_MD_CTX *mctx)
{
unsigned int hlen;
HMAC_PKEY_CTX *hctx = ctx->data;
int l = EVP_MD_CTX_size(mctx);
if (l < 0)
return 0;
*siglen = l;
if (!sig)
return 1;
if (!HMAC_Final(&hctx->ctx, sig, &hlen))
return 0;
*siglen = (size_t)hlen;
return 1;
}
static int
pkey_hmac_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
{
HMAC_PKEY_CTX *hctx = ctx->data;
ASN1_OCTET_STRING *key;
switch (type) {
case EVP_PKEY_CTRL_SET_MAC_KEY:
if ((!p2 && p1 > 0) || (p1 < -1))
return 0;
if (!ASN1_OCTET_STRING_set(&hctx->ktmp, p2, p1))
return 0;
break;
case EVP_PKEY_CTRL_MD:
hctx->md = p2;
break;
case EVP_PKEY_CTRL_DIGESTINIT:
key = ctx->pkey->pkey.ptr;
if (!HMAC_Init_ex(&hctx->ctx, key->data, key->length, hctx->md,
ctx->engine))
return 0;
break;
default:
return -2;
}
return 1;
}
static int
pkey_hmac_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_hmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, -1, p);
}
if (!strcmp(type, "hexkey")) {
unsigned char *key;
int r;
long keylen;
key = string_to_hex(value, &keylen);
if (!key)
return 0;
r = pkey_hmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, keylen, key);
free(key);
return r;
}
return -2;
}
const EVP_PKEY_METHOD hmac_pkey_meth = {
.pkey_id = EVP_PKEY_HMAC,
.init = pkey_hmac_init,
.copy = pkey_hmac_copy,
.cleanup = pkey_hmac_cleanup,
.keygen = pkey_hmac_keygen,
.signctx_init = hmac_signctx_init,
.signctx = hmac_signctx,
.ctrl = pkey_hmac_ctrl,
.ctrl_str = pkey_hmac_ctrl_str
};