/* $OpenBSD: v3_sxnet.c,v 1.10 2014/07/10 13:58:23 jsing Exp $ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project 1999.
 */
/* ====================================================================
 * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <stdio.h>
#include <string.h>

#include <openssl/asn1.h>
#include <openssl/asn1t.h>
#include <openssl/conf.h>
#include <openssl/err.h>
#include <openssl/x509v3.h>

/* Support for Thawte strong extranet extension */

#define SXNET_TEST

static int sxnet_i2r(X509V3_EXT_METHOD *method, SXNET *sx, BIO *out,
    int indent);
#ifdef SXNET_TEST
static SXNET * sxnet_v2i(X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
    STACK_OF(CONF_VALUE) *nval);
#endif
const X509V3_EXT_METHOD v3_sxnet = {
	NID_sxnet, X509V3_EXT_MULTILINE, ASN1_ITEM_ref(SXNET),
	0, 0, 0, 0,
	0, 0,
	0,
#ifdef SXNET_TEST
	(X509V3_EXT_V2I)sxnet_v2i,
#else
	0,
#endif
	(X509V3_EXT_I2R)sxnet_i2r,
	0,
	NULL
};

ASN1_SEQUENCE(SXNETID) = {
	ASN1_SIMPLE(SXNETID, zone, ASN1_INTEGER),
	ASN1_SIMPLE(SXNETID, user, ASN1_OCTET_STRING)
} ASN1_SEQUENCE_END(SXNETID)

IMPLEMENT_ASN1_FUNCTIONS(SXNETID)

ASN1_SEQUENCE(SXNET) = {
	ASN1_SIMPLE(SXNET, version, ASN1_INTEGER),
	ASN1_SEQUENCE_OF(SXNET, ids, SXNETID)
} ASN1_SEQUENCE_END(SXNET)

IMPLEMENT_ASN1_FUNCTIONS(SXNET)

static int
sxnet_i2r(X509V3_EXT_METHOD *method, SXNET *sx, BIO *out, int indent)
{
	long v;
	char *tmp;
	SXNETID *id;
	int i;

	v = ASN1_INTEGER_get(sx->version);
	BIO_printf(out, "%*sVersion: %ld (0x%lX)", indent, "", v + 1, v);
	for (i = 0; i < sk_SXNETID_num(sx->ids); i++) {
		id = sk_SXNETID_value(sx->ids, i);
		tmp = i2s_ASN1_INTEGER(NULL, id->zone);
		BIO_printf(out, "\n%*sZone: %s, User: ", indent, "", tmp);
		free(tmp);
		M_ASN1_OCTET_STRING_print(out, id->user);
	}
	return 1;
}

#ifdef SXNET_TEST

/* NBB: this is used for testing only. It should *not* be used for anything
 * else because it will just take static IDs from the configuration file and
 * they should really be separate values for each user.
 */

static SXNET *
sxnet_v2i(X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
    STACK_OF(CONF_VALUE) *nval)
{
	CONF_VALUE *cnf;
	SXNET *sx = NULL;
	int i;

	for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
		cnf = sk_CONF_VALUE_value(nval, i);
		if (!SXNET_add_id_asc(&sx, cnf->name, cnf->value, -1))
			return NULL;
	}
	return sx;
}

#endif

/* Strong Extranet utility functions */

/* Add an id given the zone as an ASCII number */

int
SXNET_add_id_asc(SXNET **psx, char *zone, char *user, int userlen)
{
	ASN1_INTEGER *izone = NULL;

	if (!(izone = s2i_ASN1_INTEGER(NULL, zone))) {
		X509V3err(X509V3_F_SXNET_ADD_ID_ASC,
		    X509V3_R_ERROR_CONVERTING_ZONE);
		return 0;
	}
	return SXNET_add_id_INTEGER(psx, izone, user, userlen);
}

/* Add an id given the zone as an unsigned long */

int
SXNET_add_id_ulong(SXNET **psx, unsigned long lzone, char *user, int userlen)
{
	ASN1_INTEGER *izone = NULL;

	if (!(izone = M_ASN1_INTEGER_new()) ||
	    !ASN1_INTEGER_set(izone, lzone)) {
		X509V3err(X509V3_F_SXNET_ADD_ID_ULONG, ERR_R_MALLOC_FAILURE);
		M_ASN1_INTEGER_free(izone);
		return 0;
	}
	return SXNET_add_id_INTEGER(psx, izone, user, userlen);
}

/* Add an id given the zone as an ASN1_INTEGER.
 * Note this version uses the passed integer and doesn't make a copy so don't
 * free it up afterwards.
 */

int
SXNET_add_id_INTEGER(SXNET **psx, ASN1_INTEGER *zone, char *user, int userlen)
{
	SXNET *sx = NULL;
	SXNETID *id = NULL;

	if (!psx || !zone || !user) {
		X509V3err(X509V3_F_SXNET_ADD_ID_INTEGER,
		    X509V3_R_INVALID_NULL_ARGUMENT);
		return 0;
	}
	if (userlen == -1)
		userlen = strlen(user);
	if (userlen > 64) {
		X509V3err(X509V3_F_SXNET_ADD_ID_INTEGER,
		    X509V3_R_USER_TOO_LONG);
		return 0;
	}
	if (!*psx) {
		if (!(sx = SXNET_new()))
			goto err;
		if (!ASN1_INTEGER_set(sx->version, 0))
			goto err;
		*psx = sx;
	} else
		sx = *psx;
	if (SXNET_get_id_INTEGER(sx, zone)) {
		X509V3err(X509V3_F_SXNET_ADD_ID_INTEGER,
		    X509V3_R_DUPLICATE_ZONE_ID);
		return 0;
	}

	if (!(id = SXNETID_new()))
		goto err;
	if (userlen == -1)
		userlen = strlen(user);

	if (!M_ASN1_OCTET_STRING_set(id->user, user, userlen))
		goto err;
	if (!sk_SXNETID_push(sx->ids, id))
		goto err;
	id->zone = zone;
	return 1;

err:
	X509V3err(X509V3_F_SXNET_ADD_ID_INTEGER, ERR_R_MALLOC_FAILURE);
	SXNETID_free(id);
	SXNET_free(sx);
	*psx = NULL;
	return 0;
}

ASN1_OCTET_STRING *
SXNET_get_id_asc(SXNET *sx, char *zone)
{
	ASN1_INTEGER *izone = NULL;
	ASN1_OCTET_STRING *oct;

	if (!(izone = s2i_ASN1_INTEGER(NULL, zone))) {
		X509V3err(X509V3_F_SXNET_GET_ID_ASC,
		    X509V3_R_ERROR_CONVERTING_ZONE);
		return NULL;
	}
	oct = SXNET_get_id_INTEGER(sx, izone);
	M_ASN1_INTEGER_free(izone);
	return oct;
}

ASN1_OCTET_STRING *
SXNET_get_id_ulong(SXNET *sx, unsigned long lzone)
{
	ASN1_INTEGER *izone = NULL;
	ASN1_OCTET_STRING *oct;

	if (!(izone = M_ASN1_INTEGER_new()) ||
	    !ASN1_INTEGER_set(izone, lzone)) {
		X509V3err(X509V3_F_SXNET_GET_ID_ULONG, ERR_R_MALLOC_FAILURE);
		M_ASN1_INTEGER_free(izone);
		return NULL;
	}
	oct = SXNET_get_id_INTEGER(sx, izone);
	M_ASN1_INTEGER_free(izone);
	return oct;
}

ASN1_OCTET_STRING *
SXNET_get_id_INTEGER(SXNET *sx, ASN1_INTEGER *zone)
{
	SXNETID *id;
	int i;

	for (i = 0; i < sk_SXNETID_num(sx->ids); i++) {
		id = sk_SXNETID_value(sx->ids, i);
		if (!M_ASN1_INTEGER_cmp(id->zone, zone))
			return id->user;
	}
	return NULL;
}

IMPLEMENT_STACK_OF(SXNETID)
IMPLEMENT_ASN1_SET_OF(SXNETID)