/*

 * Copyright 1999-2022 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the Apache License 2.0 (the "License").  You may not use

 * this file except in compliance with the License.  You can obtain a copy

 * in the file LICENSE in the source distribution or at

 * https://www.openssl.org/source/license.html

 */

#include <stdio.h>

#include "internal/cryptlib.h"

#include <openssl/conf.h>

#include <openssl/asn1.h>

#include <openssl/asn1t.h>

#include <openssl/x509v3.h>

#include "ext_dat.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 ossl_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)

{

    int64_t v;

    char *tmp;

    SXNETID *id;

    int i;

    /*

     * Since we add 1 to the version number to display it, we don't support

     * LONG_MAX since that would cause on overflow.

     */

    if (!ASN1_INTEGER_get_int64(&v, sx->version)

            || v >= LONG_MAX

            || v < LONG_MIN) {

        BIO_printf(out, "%*sVersion: <unsupported>", indent, "");

    } else {

        long vl = (long)v;

        BIO_printf(out, "%*sVersion: %ld (0x%lX)", indent, "", vl + 1, vl);

    }

    for (i = 0; i < sk_SXNETID_num(sx->ids); i++) {

        id = sk_SXNETID_value(sx->ids, i);

        tmp = i2s_ASN1_INTEGER(NULL, id->zone);

        if (tmp == NULL)

            return 0;

        BIO_printf(out, "\n%*sZone: %s, User: ", indent, "", tmp);

        OPENSSL_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;

    if ((izone = s2i_ASN1_INTEGER(NULL, zone)) == NULL) {

        ERR_raise(ERR_LIB_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, const char *user,

                       int userlen)

{

    ASN1_INTEGER *izone;

    if ((izone = ASN1_INTEGER_new()) == NULL

        || !ASN1_INTEGER_set(izone, lzone)) {

        ERR_raise(ERR_LIB_X509V3, 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 == NULL || zone == NULL || user == NULL) {

        ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_NULL_ARGUMENT);

        return 0;

    }

    if (userlen == -1)

        userlen = strlen(user);

    if (userlen > 64) {

        ERR_raise(ERR_LIB_X509V3, X509V3_R_USER_TOO_LONG);

        return 0;

    }

    if (*psx == NULL) {

        if ((sx = SXNET_new()) == NULL)

            goto err;

        if (!ASN1_INTEGER_set(sx->version, 0))

            goto err;

    } else

        sx = *psx;

    if (SXNET_get_id_INTEGER(sx, zone)) {

        ERR_raise(ERR_LIB_X509V3, X509V3_R_DUPLICATE_ZONE_ID);

        if (*psx == NULL)

            SXNET_free(sx);

        return 0;

    }

    if ((id = SXNETID_new()) == NULL)

        goto err;

    if (userlen == -1)

        userlen = strlen(user);

    if (!ASN1_OCTET_STRING_set(id->user, (const unsigned char *)user, userlen))

        goto err;

    if (!sk_SXNETID_push(sx->ids, id))

        goto err;

    id->zone = zone;

    *psx = sx;

    return 1;

 err:

    ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);

    SXNETID_free(id);

    if (*psx == NULL)

        SXNET_free(sx);

    return 0;

}

ASN1_OCTET_STRING *SXNET_get_id_asc(SXNET *sx, const char *zone)

{

    ASN1_INTEGER *izone;

    ASN1_OCTET_STRING *oct;

    if ((izone = s2i_ASN1_INTEGER(NULL, zone)) == NULL) {

        ERR_raise(ERR_LIB_X509V3, 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;

    ASN1_OCTET_STRING *oct;

    if ((izone = ASN1_INTEGER_new()) == NULL

        || !ASN1_INTEGER_set(izone, lzone)) {

        ERR_raise(ERR_LIB_X509V3, 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;

}