GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/pkcs12/p12_kiss.c Lines: 0 105 0.0 %
Date: 2017-11-13 Branches: 0 105 0.0 %

Line Branch Exec Source
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/* $OpenBSD: p12_kiss.c,v 1.19 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 <openssl/err.h>
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#include <openssl/pkcs12.h>
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/* Simplified PKCS#12 routines */
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static int parse_pk12( PKCS12 *p12, const char *pass, int passlen,
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    EVP_PKEY **pkey, STACK_OF(X509) *ocerts);
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static int parse_bags( STACK_OF(PKCS12_SAFEBAG) *bags, const char *pass,
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    int passlen, EVP_PKEY **pkey, STACK_OF(X509) *ocerts);
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static int parse_bag( PKCS12_SAFEBAG *bag, const char *pass, int passlen,
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    EVP_PKEY **pkey, STACK_OF(X509) *ocerts);
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/* Parse and decrypt a PKCS#12 structure returning user key, user cert
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 * and other (CA) certs. Note either ca should be NULL, *ca should be NULL,
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 * or it should point to a valid STACK structure. pkey and cert can be
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 * passed unitialised.
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 */
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int
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PKCS12_parse(PKCS12 *p12, const char *pass, EVP_PKEY **pkey, X509 **cert,
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    STACK_OF(X509) **ca)
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{
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	STACK_OF(X509) *ocerts = NULL;
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	X509 *x = NULL;
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	/* Check for NULL PKCS12 structure */
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	if (!p12) {
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		PKCS12error(PKCS12_R_INVALID_NULL_PKCS12_POINTER);
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		return 0;
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	}
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	if (pkey)
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		*pkey = NULL;
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	if (cert)
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		*cert = NULL;
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	/* Check the mac */
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	/* If password is zero length or NULL then try verifying both cases
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	 * to determine which password is correct. The reason for this is that
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	 * under PKCS#12 password based encryption no password and a zero length
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	 * password are two different things...
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	 */
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	if (!pass || !*pass) {
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		if (PKCS12_verify_mac(p12, NULL, 0))
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			pass = NULL;
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		else if (PKCS12_verify_mac(p12, "", 0))
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			pass = "";
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		else {
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			PKCS12error(PKCS12_R_MAC_VERIFY_FAILURE);
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			goto err;
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		}
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	} else if (!PKCS12_verify_mac(p12, pass, -1)) {
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		PKCS12error(PKCS12_R_MAC_VERIFY_FAILURE);
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		goto err;
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	}
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	/* Allocate stack for other certificates */
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	ocerts = sk_X509_new_null();
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	if (!ocerts) {
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		PKCS12error(ERR_R_MALLOC_FAILURE);
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		return 0;
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	}
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	if (!parse_pk12 (p12, pass, -1, pkey, ocerts)) {
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		PKCS12error(PKCS12_R_PARSE_ERROR);
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		goto err;
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	}
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	while ((x = sk_X509_pop(ocerts))) {
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		if (pkey && *pkey && cert && !*cert) {
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			if (X509_check_private_key(x, *pkey)) {
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				*cert = x;
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				x = NULL;
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			}
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		}
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		if (ca && x) {
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			if (!*ca)
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				*ca = sk_X509_new_null();
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			if (!*ca)
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				goto err;
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			if (!sk_X509_push(*ca, x))
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				goto err;
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			x = NULL;
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		}
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		X509_free(x);
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	}
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	if (ocerts)
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		sk_X509_pop_free(ocerts, X509_free);
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	return 1;
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err:
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	if (pkey && *pkey)
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		EVP_PKEY_free(*pkey);
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	if (cert)
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		X509_free(*cert);
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	X509_free(x);
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	if (ocerts)
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		sk_X509_pop_free(ocerts, X509_free);
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	return 0;
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}
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/* Parse the outer PKCS#12 structure */
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static int
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parse_pk12(PKCS12 *p12, const char *pass, int passlen, EVP_PKEY **pkey,
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    STACK_OF(X509) *ocerts)
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{
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	STACK_OF(PKCS7) *asafes;
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	STACK_OF(PKCS12_SAFEBAG) *bags;
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	int i, bagnid;
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	PKCS7 *p7;
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	if (!(asafes = PKCS12_unpack_authsafes (p12)))
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		return 0;
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	for (i = 0; i < sk_PKCS7_num (asafes); i++) {
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		p7 = sk_PKCS7_value (asafes, i);
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		bagnid = OBJ_obj2nid (p7->type);
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		if (bagnid == NID_pkcs7_data) {
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			bags = PKCS12_unpack_p7data(p7);
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		} else if (bagnid == NID_pkcs7_encrypted) {
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			bags = PKCS12_unpack_p7encdata(p7, pass, passlen);
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		} else
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			continue;
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		if (!bags) {
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			sk_PKCS7_pop_free(asafes, PKCS7_free);
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			return 0;
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		}
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		if (!parse_bags(bags, pass, passlen, pkey, ocerts)) {
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			sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
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			sk_PKCS7_pop_free(asafes, PKCS7_free);
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			return 0;
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		}
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		sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
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	}
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	sk_PKCS7_pop_free(asafes, PKCS7_free);
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	return 1;
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}
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static int
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parse_bags(STACK_OF(PKCS12_SAFEBAG) *bags, const char *pass, int passlen,
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    EVP_PKEY **pkey, STACK_OF(X509) *ocerts)
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{
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	int i;
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	for (i = 0; i < sk_PKCS12_SAFEBAG_num(bags); i++) {
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		if (!parse_bag(sk_PKCS12_SAFEBAG_value(bags, i), pass, passlen,
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		    pkey, ocerts))
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			return 0;
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	}
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	return 1;
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}
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static int
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parse_bag(PKCS12_SAFEBAG *bag, const char *pass, int passlen, EVP_PKEY **pkey,
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    STACK_OF(X509) *ocerts)
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{
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	PKCS8_PRIV_KEY_INFO *p8;
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	X509 *x509;
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	ASN1_TYPE *attrib;
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	ASN1_BMPSTRING *fname = NULL;
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	ASN1_OCTET_STRING *lkid = NULL;
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	if ((attrib = PKCS12_get_attr (bag, NID_friendlyName)))
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		fname = attrib->value.bmpstring;
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	if ((attrib = PKCS12_get_attr (bag, NID_localKeyID)))
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		lkid = attrib->value.octet_string;
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	switch (OBJ_obj2nid(bag->type)) {
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	case NID_keyBag:
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		if (!pkey || *pkey)
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			return 1;
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		if (!(*pkey = EVP_PKCS82PKEY(bag->value.keybag)))
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			return 0;
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		break;
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	case NID_pkcs8ShroudedKeyBag:
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		if (!pkey || *pkey)
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			return 1;
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		if (!(p8 = PKCS12_decrypt_skey(bag, pass, passlen)))
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			return 0;
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		*pkey = EVP_PKCS82PKEY(p8);
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		PKCS8_PRIV_KEY_INFO_free(p8);
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		if (!(*pkey))
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			return 0;
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		break;
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	case NID_certBag:
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		if (OBJ_obj2nid(bag->value.bag->type) != NID_x509Certificate )
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			return 1;
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		if (!(x509 = PKCS12_certbag2x509(bag)))
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			return 0;
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		if (lkid && !X509_keyid_set1(x509, lkid->data, lkid->length)) {
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			X509_free(x509);
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			return 0;
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		}
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		if (fname) {
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			int len, r;
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			unsigned char *data;
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			len = ASN1_STRING_to_UTF8(&data, fname);
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			if (len >= 0) {
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				r = X509_alias_set1(x509, data, len);
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				free(data);
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				if (!r) {
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					X509_free(x509);
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					return 0;
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				}
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			}
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		}
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		if (!sk_X509_push(ocerts, x509)) {
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			X509_free(x509);
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			return 0;
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		}
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		break;
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	case NID_safeContentsBag:
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		return parse_bags(bag->value.safes, pass, passlen,
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		    pkey, ocerts);
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		break;
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	default:
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		return 1;
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		break;
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	}
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	return 1;
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}