GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/pkcs12/p12_decr.c Lines: 40 62 64.5 %
Date: 2017-11-13 Branches: 13 26 50.0 %

Line Branch Exec Source
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/* $OpenBSD: p12_decr.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 <string.h>
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#include <openssl/err.h>
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#include <openssl/pkcs12.h>
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/* Encrypt/Decrypt a buffer based on password and algor, result in a
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 * malloc'ed buffer
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 */
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unsigned char *
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PKCS12_pbe_crypt(X509_ALGOR *algor, const char *pass, int passlen,
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    unsigned char *in, int inlen, unsigned char **data, int *datalen, int en_de)
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{
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	unsigned char *out;
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	int outlen, i;
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	EVP_CIPHER_CTX ctx;
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	EVP_CIPHER_CTX_init(&ctx);
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	/* Decrypt data */
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	if (!EVP_PBE_CipherInit(algor->algorithm, pass, passlen,
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	    algor->parameter, &ctx, en_de)) {
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		out = NULL;
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		PKCS12error(PKCS12_R_PKCS12_ALGOR_CIPHERINIT_ERROR);
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		goto err;
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	}
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	if (!(out = malloc(inlen + EVP_CIPHER_CTX_block_size(&ctx)))) {
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		PKCS12error(ERR_R_MALLOC_FAILURE);
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		goto err;
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	}
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	if (!EVP_CipherUpdate(&ctx, out, &i, in, inlen)) {
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		free(out);
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		out = NULL;
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		PKCS12error(ERR_R_EVP_LIB);
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		goto err;
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	}
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	outlen = i;
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	if (!EVP_CipherFinal_ex(&ctx, out + i, &i)) {
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		free(out);
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		out = NULL;
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		PKCS12error(PKCS12_R_PKCS12_CIPHERFINAL_ERROR);
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		goto err;
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	}
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	outlen += i;
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	if (datalen)
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		*datalen = outlen;
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	if (data)
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		*data = out;
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err:
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	EVP_CIPHER_CTX_cleanup(&ctx);
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	return out;
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}
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/* Decrypt an OCTET STRING and decode ASN1 structure
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 * if zbuf set zero buffer after use.
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 */
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void *
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PKCS12_item_decrypt_d2i(X509_ALGOR *algor, const ASN1_ITEM *it,
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    const char *pass, int passlen, ASN1_OCTET_STRING *oct, int zbuf)
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{
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	unsigned char *out;
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	const unsigned char *p;
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	void *ret;
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	int outlen;
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	if (!PKCS12_pbe_crypt(algor, pass, passlen, oct->data, oct->length,
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	    &out, &outlen, 0)) {
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		PKCS12error(PKCS12_R_PKCS12_PBE_CRYPT_ERROR);
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		return NULL;
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	}
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	p = out;
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	ret = ASN1_item_d2i(NULL, &p, outlen, it);
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	if (zbuf)
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		explicit_bzero(out, outlen);
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	if (!ret)
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		PKCS12error(PKCS12_R_DECODE_ERROR);
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	free(out);
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	return ret;
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}
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/* Encode ASN1 structure and encrypt, return OCTET STRING
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 * if zbuf set zero encoding.
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 */
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ASN1_OCTET_STRING *
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PKCS12_item_i2d_encrypt(X509_ALGOR *algor, const ASN1_ITEM *it,
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    const char *pass, int passlen,
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    void *obj, int zbuf)
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{
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	ASN1_OCTET_STRING *oct;
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	unsigned char *in = NULL;
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	int inlen;
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	if (!(oct = ASN1_OCTET_STRING_new ())) {
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		PKCS12error(ERR_R_MALLOC_FAILURE);
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		return NULL;
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	}
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	inlen = ASN1_item_i2d(obj, &in, it);
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	if (!in) {
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		PKCS12error(PKCS12_R_ENCODE_ERROR);
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		goto err;
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	}
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	if (!PKCS12_pbe_crypt(algor, pass, passlen, in, inlen, &oct->data,
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	    &oct->length, 1)) {
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		PKCS12error(PKCS12_R_ENCRYPT_ERROR);
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		goto err;
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	}
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	if (zbuf)
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		explicit_bzero(in, inlen);
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	free(in);
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	return oct;
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err:
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	free(in);
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	ASN1_OCTET_STRING_free(oct);
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	return NULL;
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}
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IMPLEMENT_PKCS12_STACK_OF(PKCS7)