/* $OpenBSD: x509_sxnet.c,v 1.1 2020/06/04 15:19:32 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 = {
        .ext_nid = NID_sxnet,
        .ext_flags = X509V3_EXT_MULTILINE,
        .it = &SXNET_it,
        .ext_new = NULL,
        .ext_free = NULL,
        .d2i = NULL,
        .i2d = NULL,
        .i2s = NULL,
        .s2i = NULL,
        .i2v = NULL,
#ifdef SXNET_TEST
        .v2i = (X509V3_EXT_V2I)sxnet_v2i,
#else
        .v2i = NULL,
#endif
        .i2r = (X509V3_EXT_I2R)sxnet_i2r,
        .r2i = NULL,
        .usr_data = NULL,
};

static const ASN1_TEMPLATE SXNETID_seq_tt[] = {
        {
                .flags = 0,
                .tag = 0,
                .offset = offsetof(SXNETID, zone),
                .field_name = "zone",
                .item = &ASN1_INTEGER_it,
        },
        {
                .flags = 0,
                .tag = 0,
                .offset = offsetof(SXNETID, user),
                .field_name = "user",
                .item = &ASN1_OCTET_STRING_it,
        },
};

const ASN1_ITEM SXNETID_it = {
        .itype = ASN1_ITYPE_SEQUENCE,
        .utype = V_ASN1_SEQUENCE,
        .templates = SXNETID_seq_tt,
        .tcount = sizeof(SXNETID_seq_tt) / sizeof(ASN1_TEMPLATE),
        .funcs = NULL,
        .size = sizeof(SXNETID),
        .sname = "SXNETID",
};


SXNETID *
d2i_SXNETID(SXNETID **a, const unsigned char **in, long len)
{
        return (SXNETID *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
            &SXNETID_it);
}

int
i2d_SXNETID(SXNETID *a, unsigned char **out)
{
        return ASN1_item_i2d((ASN1_VALUE *)a, out, &SXNETID_it);
}

SXNETID *
SXNETID_new(void)
{
        return (SXNETID *)ASN1_item_new(&SXNETID_it);
}

void
SXNETID_free(SXNETID *a)
{
        ASN1_item_free((ASN1_VALUE *)a, &SXNETID_it);
}

static const ASN1_TEMPLATE SXNET_seq_tt[] = {
        {
                .flags = 0,
                .tag = 0,
                .offset = offsetof(SXNET, version),
                .field_name = "version",
                .item = &ASN1_INTEGER_it,
        },
        {
                .flags = ASN1_TFLG_SEQUENCE_OF,
                .tag = 0,
                .offset = offsetof(SXNET, ids),
                .field_name = "ids",
                .item = &SXNETID_it,
        },
};

const ASN1_ITEM SXNET_it = {
        .itype = ASN1_ITYPE_SEQUENCE,
        .utype = V_ASN1_SEQUENCE,
        .templates = SXNET_seq_tt,
        .tcount = sizeof(SXNET_seq_tt) / sizeof(ASN1_TEMPLATE),
        .funcs = NULL,
        .size = sizeof(SXNET),
        .sname = "SXNET",
};


SXNET *
d2i_SXNET(SXNET **a, const unsigned char **in, long len)
{
        return (SXNET *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
            &SXNET_it);
}

int
i2d_SXNET(SXNET *a, unsigned char **out)
{
        return ASN1_item_i2d((ASN1_VALUE *)a, out, &SXNET_it);
}

SXNET *
SXNET_new(void)
{
        return (SXNET *)ASN1_item_new(&SXNET_it);
}

void
SXNET_free(SXNET *a)
{
        ASN1_item_free((ASN1_VALUE *)a, &SXNET_it);
}

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);
                ASN1_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, const char *zone, const char *user, int userlen)
{
        ASN1_INTEGER *izone = NULL;

        if (!(izone = s2i_ASN1_INTEGER(NULL, zone))) {
                X509V3error(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, const char *user,
    int userlen)
{
        ASN1_INTEGER *izone = NULL;

        if (!(izone = ASN1_INTEGER_new()) ||
            !ASN1_INTEGER_set(izone, lzone)) {
                X509V3error(ERR_R_MALLOC_FAILURE);
                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, const char *user,
    int userlen)
{
        SXNET *sx = NULL;
        SXNETID *id = NULL;

        if (!psx || !zone || !user) {
                X509V3error(X509V3_R_INVALID_NULL_ARGUMENT);
                return 0;
        }
        if (userlen == -1)
                userlen = strlen(user);
        if (userlen > 64) {
                X509V3error(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)) {
                X509V3error(X509V3_R_DUPLICATE_ZONE_ID);
                return 0;
        }

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

        if (!ASN1_STRING_set(id->user, user, userlen))
                goto err;
        if (!sk_SXNETID_push(sx->ids, id))
                goto err;
        id->zone = zone;
        return 1;

err:
        X509V3error(ERR_R_MALLOC_FAILURE);
        SXNETID_free(id);
        SXNET_free(sx);
        *psx = NULL;
        return 0;
}

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

        if (!(izone = s2i_ASN1_INTEGER(NULL, zone))) {
                X509V3error(X509V3_R_ERROR_CONVERTING_ZONE);
                return NULL;
        }
        oct = SXNET_get_id_INTEGER(sx, izone);
        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 = ASN1_INTEGER_new()) ||
            !ASN1_INTEGER_set(izone, lzone)) {
                X509V3error(ERR_R_MALLOC_FAILURE);
                ASN1_INTEGER_free(izone);
                return NULL;
        }
        oct = SXNET_get_id_INTEGER(sx, izone);
        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 (!ASN1_INTEGER_cmp(id->zone, zone))
                        return id->user;
        }
        return NULL;
}