/* v3_genn.c */
/*
 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
 * 1999.
 */
/* ====================================================================
 * Copyright (c) 1999-2008 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 <openssl/asn1t.h>
#include <openssl/conf.h>
#include <openssl/obj.h>
#include <openssl/x509v3.h>


ASN1_SEQUENCE(OTHERNAME) = {
    ASN1_SIMPLE(OTHERNAME, type_id, ASN1_OBJECT),
    // Maybe have a true ANY DEFINED BY later
    ASN1_EXP(OTHERNAME, value, ASN1_ANY, 0),
} ASN1_SEQUENCE_END(OTHERNAME)

IMPLEMENT_ASN1_FUNCTIONS_const(OTHERNAME)

ASN1_SEQUENCE(EDIPARTYNAME) = {
    // DirectoryString is a CHOICE type, so use explicit tagging.
    ASN1_EXP_OPT(EDIPARTYNAME, nameAssigner, DIRECTORYSTRING, 0),
    ASN1_EXP(EDIPARTYNAME, partyName, DIRECTORYSTRING, 1),
} ASN1_SEQUENCE_END(EDIPARTYNAME)

IMPLEMENT_ASN1_FUNCTIONS_const(EDIPARTYNAME)

ASN1_CHOICE(GENERAL_NAME) = {
    ASN1_IMP(GENERAL_NAME, d.otherName, OTHERNAME, GEN_OTHERNAME),
    ASN1_IMP(GENERAL_NAME, d.rfc822Name, ASN1_IA5STRING, GEN_EMAIL),
    ASN1_IMP(GENERAL_NAME, d.dNSName, ASN1_IA5STRING, GEN_DNS),
    // Don't decode this
    ASN1_IMP(GENERAL_NAME, d.x400Address, ASN1_SEQUENCE, GEN_X400),
    // X509_NAME is a CHOICE type so use EXPLICIT
    ASN1_EXP(GENERAL_NAME, d.directoryName, X509_NAME, GEN_DIRNAME),
    ASN1_IMP(GENERAL_NAME, d.ediPartyName, EDIPARTYNAME, GEN_EDIPARTY),
    ASN1_IMP(GENERAL_NAME, d.uniformResourceIdentifier, ASN1_IA5STRING,
             GEN_URI),
    ASN1_IMP(GENERAL_NAME, d.iPAddress, ASN1_OCTET_STRING, GEN_IPADD),
    ASN1_IMP(GENERAL_NAME, d.registeredID, ASN1_OBJECT, GEN_RID),
} ASN1_CHOICE_END(GENERAL_NAME)

IMPLEMENT_ASN1_FUNCTIONS(GENERAL_NAME)

ASN1_ITEM_TEMPLATE(GENERAL_NAMES) = ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF,
                                                          0, GeneralNames,
                                                          GENERAL_NAME)
ASN1_ITEM_TEMPLATE_END(GENERAL_NAMES)

IMPLEMENT_ASN1_FUNCTIONS(GENERAL_NAMES)

IMPLEMENT_ASN1_DUP_FUNCTION(GENERAL_NAME)

static int edipartyname_cmp(const EDIPARTYNAME *a, const EDIPARTYNAME *b) {
  // nameAssigner is optional and may be NULL.
  if (a->nameAssigner == NULL) {
    if (b->nameAssigner != NULL) {
      return -1;
    }
  } else {
    if (b->nameAssigner == NULL ||
        ASN1_STRING_cmp(a->nameAssigner, b->nameAssigner) != 0) {
      return -1;
    }
  }

  // partyName may not be NULL.
  return ASN1_STRING_cmp(a->partyName, b->partyName);
}

// Returns 0 if they are equal, != 0 otherwise.
int GENERAL_NAME_cmp(const GENERAL_NAME *a, const GENERAL_NAME *b) {
  if (!a || !b || a->type != b->type) {
    return -1;
  }

  switch (a->type) {
    case GEN_X400:
      return ASN1_TYPE_cmp(a->d.x400Address, b->d.x400Address);

    case GEN_EDIPARTY:
      return edipartyname_cmp(a->d.ediPartyName, b->d.ediPartyName);

    case GEN_OTHERNAME:
      return OTHERNAME_cmp(a->d.otherName, b->d.otherName);

    case GEN_EMAIL:
    case GEN_DNS:
    case GEN_URI:
      return ASN1_STRING_cmp(a->d.ia5, b->d.ia5);

    case GEN_DIRNAME:
      return X509_NAME_cmp(a->d.dirn, b->d.dirn);

    case GEN_IPADD:
      return ASN1_OCTET_STRING_cmp(a->d.ip, b->d.ip);

    case GEN_RID:
      return OBJ_cmp(a->d.rid, b->d.rid);
  }

  return -1;
}

// Returns 0 if they are equal, != 0 otherwise.
int OTHERNAME_cmp(OTHERNAME *a, OTHERNAME *b) {
  int result = -1;

  if (!a || !b) {
    return -1;
  }
  // Check their type first.
  if ((result = OBJ_cmp(a->type_id, b->type_id)) != 0) {
    return result;
  }
  // Check the value.
  result = ASN1_TYPE_cmp(a->value, b->value);
  return result;
}

void GENERAL_NAME_set0_value(GENERAL_NAME *a, int type, void *value) {
  switch (type) {
    case GEN_X400:
      a->d.x400Address = value;
      break;

    case GEN_EDIPARTY:
      a->d.ediPartyName = value;
      break;

    case GEN_OTHERNAME:
      a->d.otherName = value;
      break;

    case GEN_EMAIL:
    case GEN_DNS:
    case GEN_URI:
      a->d.ia5 = value;
      break;

    case GEN_DIRNAME:
      a->d.dirn = value;
      break;

    case GEN_IPADD:
      a->d.ip = value;
      break;

    case GEN_RID:
      a->d.rid = value;
      break;
  }
  a->type = type;
}

void *GENERAL_NAME_get0_value(const GENERAL_NAME *a, int *ptype) {
  if (ptype) {
    *ptype = a->type;
  }
  switch (a->type) {
    case GEN_X400:
      return a->d.x400Address;

    case GEN_EDIPARTY:
      return a->d.ediPartyName;

    case GEN_OTHERNAME:
      return a->d.otherName;

    case GEN_EMAIL:
    case GEN_DNS:
    case GEN_URI:
      return a->d.ia5;

    case GEN_DIRNAME:
      return a->d.dirn;

    case GEN_IPADD:
      return a->d.ip;

    case GEN_RID:
      return a->d.rid;

    default:
      return NULL;
  }
}

int GENERAL_NAME_set0_othername(GENERAL_NAME *gen, ASN1_OBJECT *oid,
                                ASN1_TYPE *value) {
  OTHERNAME *oth;
  oth = OTHERNAME_new();
  if (!oth) {
    return 0;
  }
  ASN1_TYPE_free(oth->value);
  oth->type_id = oid;
  oth->value = value;
  GENERAL_NAME_set0_value(gen, GEN_OTHERNAME, oth);
  return 1;
}

int GENERAL_NAME_get0_otherName(const GENERAL_NAME *gen, ASN1_OBJECT **poid,
                                ASN1_TYPE **pvalue) {
  if (gen->type != GEN_OTHERNAME) {
    return 0;
  }
  if (poid) {
    *poid = gen->d.otherName->type_id;
  }
  if (pvalue) {
    *pvalue = gen->d.otherName->value;
  }
  return 1;
}