text: /*
   * Copyright 1999-2020 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 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;
      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);
          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) {
          X509V3err(X509V3_F_SXNET_ADD_ID_ASC, 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)) {
          X509V3err(X509V3_F_SXNET_ADD_ID_ULONG, 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) {
          X509V3err(X509V3_F_SXNET_ADD_ID_INTEGER,
                    X509V3_R_INVALID_NULL_ARGUMENT);
          return 0;
      }
      if (userlen == -1)
          userlen = strlen(user);
      if (userlen > 64) {
          X509V3err(X509V3_F_SXNET_ADD_ID_INTEGER, 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;
          *psx = sx;
      } else
          sx = *psx;
      if (SXNET_get_id_INTEGER(sx, zone)) {
          X509V3err(X509V3_F_SXNET_ADD_ID_INTEGER, X509V3_R_DUPLICATE_ZONE_ID);
          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;
      return 1;
  
   err:
      X509V3err(X509V3_F_SXNET_ADD_ID_INTEGER, 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;
      ASN1_OCTET_STRING *oct;
  
      if ((izone = s2i_ASN1_INTEGER(NULL, zone)) == NULL) {
          X509V3err(X509V3_F_SXNET_GET_ID_ASC, 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)) {
          X509V3err(X509V3_F_SXNET_GET_ID_ULONG, 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;
  }
  