GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/evp/p5_crpt.c Lines: 39 53 73.6 %
Date: 2017-11-13 Branches: 21 40 52.5 %

Line Branch Exec Source
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/* $OpenBSD: p5_crpt.c,v 1.18 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/err.h>
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#include <openssl/evp.h>
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#include <openssl/x509.h>
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/* Doesn't do anything now: Builtin PBE algorithms in static table.
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 */
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void
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PKCS5_PBE_add(void)
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{
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}
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int
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PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
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    ASN1_TYPE *param, const EVP_CIPHER *cipher, const EVP_MD *md, int en_de)
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{
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8
	EVP_MD_CTX ctx;
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4
	unsigned char md_tmp[EVP_MAX_MD_SIZE];
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4
	unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
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	int i;
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	PBEPARAM *pbe;
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	int saltlen, iter;
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	unsigned char *salt;
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4
	const unsigned char *pbuf;
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	int mdsize;
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	int rv = 0;
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	/* Extract useful info from parameter */
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12
	if (param == NULL || param->type != V_ASN1_SEQUENCE ||
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4
	    param->value.sequence == NULL) {
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		EVPerror(EVP_R_DECODE_ERROR);
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		return 0;
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	}
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4
	mdsize = EVP_MD_size(md);
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4
	if (mdsize < 0)
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		return 0;
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4
	pbuf = param->value.sequence->data;
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4
	if (!(pbe = d2i_PBEPARAM(NULL, &pbuf, param->value.sequence->length))) {
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		EVPerror(EVP_R_DECODE_ERROR);
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		return 0;
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	}
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4
	if (!pbe->iter)
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		iter = 1;
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4
	else if ((iter = ASN1_INTEGER_get(pbe->iter)) <= 0) {
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		EVPerror(EVP_R_UNSUPORTED_NUMBER_OF_ROUNDS);
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		return 0;
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	}
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4
	salt = pbe->salt->data;
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4
	saltlen = pbe->salt->length;
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4
	if (!pass)
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		passlen = 0;
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4
	else if (passlen == -1)
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		passlen = strlen(pass);
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4
	EVP_MD_CTX_init(&ctx);
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4
	if (!EVP_DigestInit_ex(&ctx, md, NULL))
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		goto err;
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4
	if (!EVP_DigestUpdate(&ctx, pass, passlen))
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		goto err;
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4
	if (!EVP_DigestUpdate(&ctx, salt, saltlen))
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		goto err;
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4
	if (!EVP_DigestFinal_ex(&ctx, md_tmp, NULL))
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		goto err;
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16384
	for (i = 1; i < iter; i++) {
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8188
		if (!EVP_DigestInit_ex(&ctx, md, NULL))
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			goto err;
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8188
		if (!EVP_DigestUpdate(&ctx, md_tmp, mdsize))
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			goto err;
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8188
		if (!EVP_DigestFinal_ex (&ctx, md_tmp, NULL))
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			goto err;
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	}
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4
	if ((size_t)EVP_CIPHER_key_length(cipher) > sizeof(md_tmp)) {
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		EVPerror(EVP_R_BAD_KEY_LENGTH);
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		goto err;
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	}
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4
	memcpy(key, md_tmp, EVP_CIPHER_key_length(cipher));
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4
	if ((size_t)EVP_CIPHER_iv_length(cipher) > 16) {
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		EVPerror(EVP_R_IV_TOO_LARGE);
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		goto err;
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	}
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8
	memcpy(iv, md_tmp + (16 - EVP_CIPHER_iv_length(cipher)),
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4
	    EVP_CIPHER_iv_length(cipher));
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4
	if (!EVP_CipherInit_ex(cctx, cipher, NULL, key, iv, en_de))
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		goto err;
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4
	explicit_bzero(md_tmp, EVP_MAX_MD_SIZE);
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4
	explicit_bzero(key, EVP_MAX_KEY_LENGTH);
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4
	explicit_bzero(iv, EVP_MAX_IV_LENGTH);
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4
	rv = 1;
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err:
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4
	EVP_MD_CTX_cleanup(&ctx);
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4
	PBEPARAM_free(pbe);
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4
	return rv;
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4
}