GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/pkcs12/p12_mutl.c Lines: 52 85 61.2 %
Date: 2017-11-13 Branches: 25 50 50.0 %

Line Branch Exec Source
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/* $OpenBSD: p12_mutl.c,v 1.23 2017/01/29 17:49:23 beck Exp $ */
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/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
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 * project 1999.
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 */
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/* ====================================================================
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 * Copyright (c) 1999 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 <stdlib.h>
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#include <string.h>
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#include <openssl/opensslconf.h>
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#ifndef OPENSSL_NO_HMAC
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#include <openssl/err.h>
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#include <openssl/hmac.h>
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#include <openssl/pkcs12.h>
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/* Generate a MAC */
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int
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PKCS12_gen_mac(PKCS12 *p12, const char *pass, int passlen,
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    unsigned char *mac, unsigned int *maclen)
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{
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	const EVP_MD *md_type;
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	HMAC_CTX hmac;
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	unsigned char key[EVP_MAX_MD_SIZE], *salt;
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	int saltlen, iter;
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	int md_size;
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	if (!PKCS7_type_is_data(p12->authsafes)) {
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		PKCS12error(PKCS12_R_CONTENT_TYPE_NOT_DATA);
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		return 0;
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	}
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	salt = p12->mac->salt->data;
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	saltlen = p12->mac->salt->length;
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	if (!p12->mac->iter)
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		iter = 1;
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	else if ((iter = ASN1_INTEGER_get(p12->mac->iter)) <= 0) {
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		PKCS12error(PKCS12_R_DECODE_ERROR);
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		return 0;
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	}
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	if (!(md_type = EVP_get_digestbyobj(
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	    p12->mac->dinfo->algor->algorithm))) {
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		PKCS12error(PKCS12_R_UNKNOWN_DIGEST_ALGORITHM);
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		return 0;
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	}
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	md_size = EVP_MD_size(md_type);
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	if (md_size < 0)
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		return 0;
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	if (!PKCS12_key_gen(pass, passlen, salt, saltlen, PKCS12_MAC_ID, iter,
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	    md_size, key, md_type)) {
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		PKCS12error(PKCS12_R_KEY_GEN_ERROR);
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		return 0;
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	}
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	HMAC_CTX_init(&hmac);
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	if (!HMAC_Init_ex(&hmac, key, md_size, md_type, NULL) ||
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	    !HMAC_Update(&hmac, p12->authsafes->d.data->data,
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	    p12->authsafes->d.data->length) ||
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	    !HMAC_Final(&hmac, mac, maclen)) {
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		HMAC_CTX_cleanup(&hmac);
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		return 0;
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	}
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	HMAC_CTX_cleanup(&hmac);
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	return 1;
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}
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/* Verify the mac */
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int
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PKCS12_verify_mac(PKCS12 *p12, const char *pass, int passlen)
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{
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	unsigned char mac[EVP_MAX_MD_SIZE];
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	unsigned int maclen;
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	if (p12->mac == NULL) {
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		PKCS12error(PKCS12_R_MAC_ABSENT);
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		return 0;
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	}
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	if (!PKCS12_gen_mac(p12, pass, passlen, mac, &maclen)) {
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		PKCS12error(PKCS12_R_MAC_GENERATION_ERROR);
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		return 0;
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	}
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	if ((maclen != (unsigned int)p12->mac->dinfo->digest->length) ||
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	    memcmp(mac, p12->mac->dinfo->digest->data, maclen))
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		return 0;
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	return 1;
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}
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/* Set a mac */
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int
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PKCS12_set_mac(PKCS12 *p12, const char *pass, int passlen, unsigned char *salt,
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    int saltlen, int iter, const EVP_MD *md_type)
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{
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	unsigned char mac[EVP_MAX_MD_SIZE];
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	unsigned int maclen;
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	if (!md_type)
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		md_type = EVP_sha1();
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	if (PKCS12_setup_mac(p12, iter, salt, saltlen, md_type) ==
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	    PKCS12_ERROR) {
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		PKCS12error(PKCS12_R_MAC_SETUP_ERROR);
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		return 0;
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	}
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	if (!PKCS12_gen_mac(p12, pass, passlen, mac, &maclen)) {
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		PKCS12error(PKCS12_R_MAC_GENERATION_ERROR);
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		return 0;
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	}
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	if (!(ASN1_STRING_set(p12->mac->dinfo->digest, mac, maclen))) {
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		PKCS12error(PKCS12_R_MAC_STRING_SET_ERROR);
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		return 0;
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	}
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	return 1;
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}
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/* Set up a mac structure */
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int
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PKCS12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt, int saltlen,
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    const EVP_MD *md_type)
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{
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	if (!(p12->mac = PKCS12_MAC_DATA_new()))
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		return PKCS12_ERROR;
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	if (iter > 1) {
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		if (!(p12->mac->iter = ASN1_INTEGER_new())) {
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			PKCS12error(ERR_R_MALLOC_FAILURE);
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			return 0;
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		}
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		if (!ASN1_INTEGER_set(p12->mac->iter, iter)) {
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			PKCS12error(ERR_R_MALLOC_FAILURE);
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			return 0;
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		}
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	}
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	if (!saltlen)
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		saltlen = PKCS12_SALT_LEN;
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	if (!(p12->mac->salt->data = malloc(saltlen))) {
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		PKCS12error(ERR_R_MALLOC_FAILURE);
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		return 0;
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	}
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	p12->mac->salt->length = saltlen;
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	if (!salt)
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		arc4random_buf(p12->mac->salt->data, saltlen);
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	else
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		memcpy (p12->mac->salt->data, salt, saltlen);
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	p12->mac->dinfo->algor->algorithm = OBJ_nid2obj(EVP_MD_type(md_type));
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	if (!(p12->mac->dinfo->algor->parameter = ASN1_TYPE_new())) {
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		PKCS12error(ERR_R_MALLOC_FAILURE);
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		return 0;
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	}
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	p12->mac->dinfo->algor->parameter->type = V_ASN1_NULL;
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	return 1;
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}
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#endif