/*
 * 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/conf.h>
#include <openssl/err.h>
#include <openssl/obj.h>
#include <openssl/x509.h>

#include "internal.h"


static const BIT_STRING_BITNAME ns_cert_type_table[] = {
    {0, "SSL Client", "client"},
    {1, "SSL Server", "server"},
    {2, "S/MIME", "email"},
    {3, "Object Signing", "objsign"},
    {4, "Unused", "reserved"},
    {5, "SSL CA", "sslCA"},
    {6, "S/MIME CA", "emailCA"},
    {7, "Object Signing CA", "objCA"},
    {-1, NULL, NULL}};

static const BIT_STRING_BITNAME key_usage_type_table[] = {
    {0, "Digital Signature", "digitalSignature"},
    {1, "Non Repudiation", "nonRepudiation"},
    {2, "Key Encipherment", "keyEncipherment"},
    {3, "Data Encipherment", "dataEncipherment"},
    {4, "Key Agreement", "keyAgreement"},
    {5, "Certificate Sign", "keyCertSign"},
    {6, "CRL Sign", "cRLSign"},
    {7, "Encipher Only", "encipherOnly"},
    {8, "Decipher Only", "decipherOnly"},
    {-1, NULL, NULL}};

static STACK_OF(CONF_VALUE) *i2v_ASN1_BIT_STRING(
    const X509V3_EXT_METHOD *method, void *ext, STACK_OF(CONF_VALUE) *ret) {
  const ASN1_BIT_STRING *bits = ext;
  const BIT_STRING_BITNAME *bnam;
  for (bnam = method->usr_data; bnam->lname; bnam++) {
    if (ASN1_BIT_STRING_get_bit(bits, bnam->bitnum)) {
      X509V3_add_value(bnam->lname, NULL, &ret);
    }
  }
  return ret;
}

static void *v2i_ASN1_BIT_STRING(const X509V3_EXT_METHOD *method,
                                 const X509V3_CTX *ctx,
                                 const STACK_OF(CONF_VALUE) *nval) {
  ASN1_BIT_STRING *bs;
  if (!(bs = ASN1_BIT_STRING_new())) {
    return NULL;
  }
  for (size_t i = 0; i < sk_CONF_VALUE_num(nval); i++) {
    const CONF_VALUE *val = sk_CONF_VALUE_value(nval, i);
    const BIT_STRING_BITNAME *bnam;
    for (bnam = method->usr_data; bnam->lname; bnam++) {
      if (!strcmp(bnam->sname, val->name) || !strcmp(bnam->lname, val->name)) {
        if (!ASN1_BIT_STRING_set_bit(bs, bnam->bitnum, 1)) {
          ASN1_BIT_STRING_free(bs);
          return NULL;
        }
        break;
      }
    }
    if (!bnam->lname) {
      OPENSSL_PUT_ERROR(X509V3, X509V3_R_UNKNOWN_BIT_STRING_ARGUMENT);
      X509V3_conf_err(val);
      ASN1_BIT_STRING_free(bs);
      return NULL;
    }
  }
  return bs;
}

#define EXT_BITSTRING(nid, table)                                             \
  {                                                                           \
    nid, 0, ASN1_ITEM_ref(ASN1_BIT_STRING), 0, 0, 0, 0, 0, 0,                 \
        i2v_ASN1_BIT_STRING, v2i_ASN1_BIT_STRING, NULL, NULL, (void *)(table) \
  }

const X509V3_EXT_METHOD v3_nscert =
    EXT_BITSTRING(NID_netscape_cert_type, ns_cert_type_table);
const X509V3_EXT_METHOD v3_key_usage =
    EXT_BITSTRING(NID_key_usage, key_usage_type_table);