GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/hmac/hm_ameth.c Lines: 7 30 23.3 %
Date: 2017-11-07 Branches: 2 20 10.0 %

Line Branch Exec Source
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/* $OpenBSD: hm_ameth.c,v 1.10 2015/09/10 15:56:25 jsing Exp $ */
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/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
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 * project 2007.
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 */
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/* ====================================================================
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 * Copyright (c) 2007 The OpenSSL 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 OpenSSL Project
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 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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 *
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 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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 *    endorse or promote products derived from this software without
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 *    prior written permission. For written permission, please contact
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 *    licensing@OpenSSL.org.
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 *
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 * 5. Products derived from this software may not be called "OpenSSL"
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 *    nor may "OpenSSL" appear in their names without prior written
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 *    permission of the OpenSSL 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 OpenSSL Project
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 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL 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 OpenSSL 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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 * This product includes cryptographic software written by Eric Young
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 * (eay@cryptsoft.com).  This product includes software written by Tim
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 * Hudson (tjh@cryptsoft.com).
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 *
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 */
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#include <stdio.h>
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#include <string.h>
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#include <openssl/evp.h>
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#include "asn1_locl.h"
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#define HMAC_TEST_PRIVATE_KEY_FORMAT
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/* HMAC "ASN1" method. This is just here to indicate the
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 * maximum HMAC output length and to free up an HMAC
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 * key.
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 */
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static int
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hmac_size(const EVP_PKEY *pkey)
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{
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	return EVP_MAX_MD_SIZE;
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}
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static void
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hmac_key_free(EVP_PKEY *pkey)
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{
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	ASN1_OCTET_STRING *os = (ASN1_OCTET_STRING *)pkey->pkey.ptr;
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	if (os) {
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		if (os->data)
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			explicit_bzero(os->data, os->length);
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		ASN1_OCTET_STRING_free(os);
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	}
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}
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static int
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hmac_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
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{
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	switch (op) {
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	case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
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		*(int *)arg2 = NID_sha1;
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		return 1;
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	default:
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		return -2;
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	}
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}
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#ifdef HMAC_TEST_PRIVATE_KEY_FORMAT
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/* A bogus private key format for test purposes. This is simply the
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 * HMAC key with "HMAC PRIVATE KEY" in the headers. When enabled the
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 * genpkey utility can be used to "generate" HMAC keys.
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 */
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static int
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old_hmac_decode(EVP_PKEY *pkey, const unsigned char **pder, int derlen)
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{
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	ASN1_OCTET_STRING *os;
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	os = ASN1_OCTET_STRING_new();
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	if (os == NULL)
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		goto err;
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	if (ASN1_OCTET_STRING_set(os, *pder, derlen) == 0)
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		goto err;
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	if (EVP_PKEY_assign(pkey, EVP_PKEY_HMAC, os) == 0)
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		goto err;
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	return 1;
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err:
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	ASN1_OCTET_STRING_free(os);
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	return 0;
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}
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static int
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old_hmac_encode(const EVP_PKEY *pkey, unsigned char **pder)
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{
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	int inc;
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	ASN1_OCTET_STRING *os = (ASN1_OCTET_STRING *)pkey->pkey.ptr;
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	if (pder) {
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		if (!*pder) {
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			*pder = malloc(os->length);
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			if (*pder == NULL)
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				return -1;
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			inc = 0;
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		} else
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			inc = 1;
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		memcpy(*pder, os->data, os->length);
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		if (inc)
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			*pder += os->length;
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	}
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	return os->length;
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}
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#endif
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const EVP_PKEY_ASN1_METHOD hmac_asn1_meth = {
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	.pkey_id = EVP_PKEY_HMAC,
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	.pkey_base_id = EVP_PKEY_HMAC,
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	.pem_str = "HMAC",
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	.info = "OpenSSL HMAC method",
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	.pkey_size = hmac_size,
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	.pkey_free = hmac_key_free,
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	.pkey_ctrl = hmac_pkey_ctrl,
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#ifdef HMAC_TEST_PRIVATE_KEY_FORMAT
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	.old_priv_decode = old_hmac_decode,
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	.old_priv_encode = old_hmac_encode
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#endif
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};