/* v3_sxnet.c */
/*
 * 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_grpc/asn1.h>
#include <openssl_grpc/asn1t.h>
#include <openssl_grpc/conf.h>
#include <openssl_grpc/err.h>
#include <openssl_grpc/mem.h>
#include <openssl_grpc/obj.h>
#include <openssl_grpc/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;
    size_t 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);
        OPENSSL_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;
    size_t 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))) {
        OPENSSL_PUT_ERROR(X509V3, 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)) {
        OPENSSL_PUT_ERROR(X509V3, 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) {
        OPENSSL_PUT_ERROR(X509V3, X509V3_R_INVALID_NULL_ARGUMENT);
        return 0;
    }
    if (userlen == -1)
        userlen = strlen(user);
    if (userlen > 64) {
        OPENSSL_PUT_ERROR(X509V3, 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)) {
        OPENSSL_PUT_ERROR(X509V3, 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:
    OPENSSL_PUT_ERROR(X509V3, 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))) {
        OPENSSL_PUT_ERROR(X509V3, 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)) {
        OPENSSL_PUT_ERROR(X509V3, 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;
    size_t 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_ASN1_SET_OF(SXNETID)
