text: /* v3_alt.c */
  /*
   * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   * project.
   */
  /* ====================================================================
   * Copyright (c) 1999-2003 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/mem.h>
  #include <openssl/obj.h>
  #include <openssl/x509v3.h>
  
  static GENERAL_NAMES *v2i_subject_alt(X509V3_EXT_METHOD *method,
                                        X509V3_CTX *ctx,
                                        STACK_OF(CONF_VALUE) *nval);
  static GENERAL_NAMES *v2i_issuer_alt(X509V3_EXT_METHOD *method,
                                       X509V3_CTX *ctx,
                                       STACK_OF(CONF_VALUE) *nval);
  static int copy_email(X509V3_CTX *ctx, GENERAL_NAMES *gens, int move_p);
  static int copy_issuer(X509V3_CTX *ctx, GENERAL_NAMES *gens);
  static int do_othername(GENERAL_NAME *gen, char *value, X509V3_CTX *ctx);
  static int do_dirname(GENERAL_NAME *gen, char *value, X509V3_CTX *ctx);
  
  const X509V3_EXT_METHOD v3_alt[] = {
      {NID_subject_alt_name, 0, ASN1_ITEM_ref(GENERAL_NAMES),
       0, 0, 0, 0,
       0, 0,
       (X509V3_EXT_I2V) i2v_GENERAL_NAMES,
       (X509V3_EXT_V2I)v2i_subject_alt,
       NULL, NULL, NULL},
  
      {NID_issuer_alt_name, 0, ASN1_ITEM_ref(GENERAL_NAMES),
       0, 0, 0, 0,
       0, 0,
       (X509V3_EXT_I2V) i2v_GENERAL_NAMES,
       (X509V3_EXT_V2I)v2i_issuer_alt,
       NULL, NULL, NULL},
  
      {NID_certificate_issuer, 0, ASN1_ITEM_ref(GENERAL_NAMES),
       0, 0, 0, 0,
       0, 0,
       (X509V3_EXT_I2V) i2v_GENERAL_NAMES,
       NULL, NULL, NULL, NULL},
  };
  
  STACK_OF(CONF_VALUE) *i2v_GENERAL_NAMES(X509V3_EXT_METHOD *method,
                                          GENERAL_NAMES *gens,
                                          STACK_OF(CONF_VALUE) *ret)
  {
      size_t i;
      GENERAL_NAME *gen;
      for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
          gen = sk_GENERAL_NAME_value(gens, i);
          ret = i2v_GENERAL_NAME(method, gen, ret);
      }
      if (!ret)
          return sk_CONF_VALUE_new_null();
      return ret;
  }
  
  STACK_OF(CONF_VALUE) *i2v_GENERAL_NAME(X509V3_EXT_METHOD *method,
                                         GENERAL_NAME *gen,
                                         STACK_OF(CONF_VALUE) *ret)
  {
      unsigned char *p;
      char oline[256], htmp[5];
      int i;
      switch (gen->type) {
      case GEN_OTHERNAME:
          if (!X509V3_add_value("othername", "<unsupported>", &ret))
              return NULL;
          break;
  
      case GEN_X400:
          if (!X509V3_add_value("X400Name", "<unsupported>", &ret))
              return NULL;
          break;
  
      case GEN_EDIPARTY:
          if (!X509V3_add_value("EdiPartyName", "<unsupported>", &ret))
              return NULL;
          break;
  
      case GEN_EMAIL:
          if (!X509V3_add_value_uchar("email", gen->d.ia5->data, &ret))
              return NULL;
          break;
  
      case GEN_DNS:
          if (!X509V3_add_value_uchar("DNS", gen->d.ia5->data, &ret))
              return NULL;
          break;
  
      case GEN_URI:
          if (!X509V3_add_value_uchar("URI", gen->d.ia5->data, &ret))
              return NULL;
          break;
  
      case GEN_DIRNAME:
          if (X509_NAME_oneline(gen->d.dirn, oline, 256) == NULL
                  || !X509V3_add_value("DirName", oline, &ret))
              return NULL;
          break;
  
      case GEN_IPADD:
          p = gen->d.ip->data;
          if (gen->d.ip->length == 4)
              BIO_snprintf(oline, sizeof oline,
                           "%d.%d.%d.%d", p[0], p[1], p[2], p[3]);
          else if (gen->d.ip->length == 16) {
              oline[0] = 0;
              for (i = 0; i < 8; i++) {
                  BIO_snprintf(htmp, sizeof htmp, "%X", p[0] << 8 | p[1]);
                  p += 2;
                  BUF_strlcat(oline, htmp, sizeof(oline));
                  if (i != 7)
                      BUF_strlcat(oline, ":", sizeof(oline));
              }
          } else {
              if (!X509V3_add_value("IP Address", "<invalid>", &ret))
                  return NULL;
              break;
          }
          if (!X509V3_add_value("IP Address", oline, &ret))
              return NULL;
          break;
  
      case GEN_RID:
          i2t_ASN1_OBJECT(oline, 256, gen->d.rid);
          if (!X509V3_add_value("Registered ID", oline, &ret))
              return NULL;
          break;
      }
      return ret;
  }
  
  int GENERAL_NAME_print(BIO *out, GENERAL_NAME *gen)
  {
      unsigned char *p;
      int i;
      switch (gen->type) {
      case GEN_OTHERNAME:
          BIO_printf(out, "othername:<unsupported>");
          break;
  
      case GEN_X400:
          BIO_printf(out, "X400Name:<unsupported>");
          break;
  
      case GEN_EDIPARTY:
          /* Maybe fix this: it is supported now */
          BIO_printf(out, "EdiPartyName:<unsupported>");
          break;
  
      case GEN_EMAIL:
          BIO_printf(out, "email:%s", gen->d.ia5->data);
          break;
  
      case GEN_DNS:
          BIO_printf(out, "DNS:%s", gen->d.ia5->data);
          break;
  
      case GEN_URI:
          BIO_printf(out, "URI:%s", gen->d.ia5->data);
          break;
  
      case GEN_DIRNAME:
          BIO_printf(out, "DirName: ");
          X509_NAME_print_ex(out, gen->d.dirn, 0, XN_FLAG_ONELINE);
          break;
  
      case GEN_IPADD:
          p = gen->d.ip->data;
          if (gen->d.ip->length == 4)
              BIO_printf(out, "IP Address:%d.%d.%d.%d", p[0], p[1], p[2], p[3]);
          else if (gen->d.ip->length == 16) {
              BIO_printf(out, "IP Address");
              for (i = 0; i < 8; i++) {
                  BIO_printf(out, ":%X", p[0] << 8 | p[1]);
                  p += 2;
              }
              BIO_puts(out, "\n");
          } else {
              BIO_printf(out, "IP Address:<invalid>");
              break;
          }
          break;
  
      case GEN_RID:
          BIO_printf(out, "Registered ID");
          i2a_ASN1_OBJECT(out, gen->d.rid);
          break;
      }
      return 1;
  }
  
  static GENERAL_NAMES *v2i_issuer_alt(X509V3_EXT_METHOD *method,
                                       X509V3_CTX *ctx,
                                       STACK_OF(CONF_VALUE) *nval)
  {
      GENERAL_NAMES *gens = NULL;
      CONF_VALUE *cnf;
      size_t i;
      if (!(gens = sk_GENERAL_NAME_new_null())) {
          OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
          return NULL;
      }
      for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
          cnf = sk_CONF_VALUE_value(nval, i);
          if (!name_cmp(cnf->name, "issuer") && cnf->value &&
              !strcmp(cnf->value, "copy")) {
              if (!copy_issuer(ctx, gens))
                  goto err;
          } else {
              GENERAL_NAME *gen;
              if (!(gen = v2i_GENERAL_NAME(method, ctx, cnf)))
                  goto err;
              sk_GENERAL_NAME_push(gens, gen);
          }
      }
      return gens;
   err:
      sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
      return NULL;
  }
  
  /* Append subject altname of issuer to issuer alt name of subject */
  
  static int copy_issuer(X509V3_CTX *ctx, GENERAL_NAMES *gens)
  {
      GENERAL_NAMES *ialt;
      GENERAL_NAME *gen;
      X509_EXTENSION *ext;
      int i;
      size_t j;
      if (ctx && (ctx->flags == CTX_TEST))
          return 1;
      if (!ctx || !ctx->issuer_cert) {
          OPENSSL_PUT_ERROR(X509V3, X509V3_R_NO_ISSUER_DETAILS);
          goto err;
      }
      i = X509_get_ext_by_NID(ctx->issuer_cert, NID_subject_alt_name, -1);
      if (i < 0)
          return 1;
      if (!(ext = X509_get_ext(ctx->issuer_cert, i)) ||
          !(ialt = X509V3_EXT_d2i(ext))) {
          OPENSSL_PUT_ERROR(X509V3, X509V3_R_ISSUER_DECODE_ERROR);
          goto err;
      }
  
      for (j = 0; j < sk_GENERAL_NAME_num(ialt); j++) {
          gen = sk_GENERAL_NAME_value(ialt, j);
          if (!sk_GENERAL_NAME_push(gens, gen)) {
              OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
              goto err;
          }
      }
      sk_GENERAL_NAME_free(ialt);
  
      return 1;
  
   err:
      return 0;
  
  }
  
  static GENERAL_NAMES *v2i_subject_alt(X509V3_EXT_METHOD *method,
                                        X509V3_CTX *ctx,
                                        STACK_OF(CONF_VALUE) *nval)
  {
      GENERAL_NAMES *gens = NULL;
      CONF_VALUE *cnf;
      size_t i;
      if (!(gens = sk_GENERAL_NAME_new_null())) {
          OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
          return NULL;
      }
      for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
          cnf = sk_CONF_VALUE_value(nval, i);
          if (!name_cmp(cnf->name, "email") && cnf->value &&
              !strcmp(cnf->value, "copy")) {
              if (!copy_email(ctx, gens, 0))
                  goto err;
          } else if (!name_cmp(cnf->name, "email") && cnf->value &&
                     !strcmp(cnf->value, "move")) {
              if (!copy_email(ctx, gens, 1))
                  goto err;
          } else {
              GENERAL_NAME *gen;
              if (!(gen = v2i_GENERAL_NAME(method, ctx, cnf)))
                  goto err;
              sk_GENERAL_NAME_push(gens, gen);
          }
      }
      return gens;
   err:
      sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
      return NULL;
  }
  
  /*
   * Copy any email addresses in a certificate or request to GENERAL_NAMES
   */
  
  static int copy_email(X509V3_CTX *ctx, GENERAL_NAMES *gens, int move_p)
  {
      X509_NAME *nm;
      ASN1_IA5STRING *email = NULL;
      X509_NAME_ENTRY *ne;
      GENERAL_NAME *gen = NULL;
      int i;
      if (ctx != NULL && ctx->flags == CTX_TEST)
          return 1;
      if (!ctx || (!ctx->subject_cert && !ctx->subject_req)) {
          OPENSSL_PUT_ERROR(X509V3, X509V3_R_NO_SUBJECT_DETAILS);
          goto err;
      }
      /* Find the subject name */
      if (ctx->subject_cert)
          nm = X509_get_subject_name(ctx->subject_cert);
      else
          nm = X509_REQ_get_subject_name(ctx->subject_req);
  
      /* Now add any email address(es) to STACK */
      i = -1;
      while ((i = X509_NAME_get_index_by_NID(nm,
                                             NID_pkcs9_emailAddress, i)) >= 0) {
          ne = X509_NAME_get_entry(nm, i);
          email = M_ASN1_IA5STRING_dup(X509_NAME_ENTRY_get_data(ne));
          if (move_p) {
              X509_NAME_delete_entry(nm, i);
              X509_NAME_ENTRY_free(ne);
              i--;
          }
          if (!email || !(gen = GENERAL_NAME_new())) {
              OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
              goto err;
          }
          gen->d.ia5 = email;
          email = NULL;
          gen->type = GEN_EMAIL;
          if (!sk_GENERAL_NAME_push(gens, gen)) {
              OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
              goto err;
          }
          gen = NULL;
      }
  
      return 1;
  
   err:
      GENERAL_NAME_free(gen);
      M_ASN1_IA5STRING_free(email);
      return 0;
  
  }
  
  GENERAL_NAMES *v2i_GENERAL_NAMES(const X509V3_EXT_METHOD *method,
                                   X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval)
  {
      GENERAL_NAME *gen;
      GENERAL_NAMES *gens = NULL;
      CONF_VALUE *cnf;
      size_t i;
      if (!(gens = sk_GENERAL_NAME_new_null())) {
          OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
          return NULL;
      }
      for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
          cnf = sk_CONF_VALUE_value(nval, i);
          if (!(gen = v2i_GENERAL_NAME(method, ctx, cnf)))
              goto err;
          sk_GENERAL_NAME_push(gens, gen);
      }
      return gens;
   err:
      sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
      return NULL;
  }
  
  GENERAL_NAME *v2i_GENERAL_NAME(const X509V3_EXT_METHOD *method,
                                 X509V3_CTX *ctx, CONF_VALUE *cnf)
  {
      return v2i_GENERAL_NAME_ex(NULL, method, ctx, cnf, 0);
  }
  
  GENERAL_NAME *a2i_GENERAL_NAME(GENERAL_NAME *out,
                                 const X509V3_EXT_METHOD *method,
                                 X509V3_CTX *ctx, int gen_type, char *value,
                                 int is_nc)
  {
      char is_string = 0;
      GENERAL_NAME *gen = NULL;
  
      if (!value) {
          OPENSSL_PUT_ERROR(X509V3, X509V3_R_MISSING_VALUE);
          return NULL;
      }
  
      if (out)
          gen = out;
      else {
          gen = GENERAL_NAME_new();
          if (gen == NULL) {
              OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
              return NULL;
          }
      }
  
      switch (gen_type) {
      case GEN_URI:
      case GEN_EMAIL:
      case GEN_DNS:
          is_string = 1;
          break;
  
      case GEN_RID:
          {
              ASN1_OBJECT *obj;
              if (!(obj = OBJ_txt2obj(value, 0))) {
                  OPENSSL_PUT_ERROR(X509V3, X509V3_R_BAD_OBJECT);
                  ERR_add_error_data(2, "value=", value);
                  goto err;
              }
              gen->d.rid = obj;
          }
          break;
  
      case GEN_IPADD:
          if (is_nc)
              gen->d.ip = a2i_IPADDRESS_NC(value);
          else
              gen->d.ip = a2i_IPADDRESS(value);
          if (gen->d.ip == NULL) {
              OPENSSL_PUT_ERROR(X509V3, X509V3_R_BAD_IP_ADDRESS);
              ERR_add_error_data(2, "value=", value);
              goto err;
          }
          break;
  
      case GEN_DIRNAME:
          if (!do_dirname(gen, value, ctx)) {
              OPENSSL_PUT_ERROR(X509V3, X509V3_R_DIRNAME_ERROR);
              goto err;
          }
          break;
  
      case GEN_OTHERNAME:
          if (!do_othername(gen, value, ctx)) {
              OPENSSL_PUT_ERROR(X509V3, X509V3_R_OTHERNAME_ERROR);
              goto err;
          }
          break;
      default:
          OPENSSL_PUT_ERROR(X509V3, X509V3_R_UNSUPPORTED_TYPE);
          goto err;
      }
  
      if (is_string) {
          if (!(gen->d.ia5 = M_ASN1_IA5STRING_new()) ||
              !ASN1_STRING_set(gen->d.ia5, (unsigned char *)value,
                               strlen(value))) {
              OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
              goto err;
          }
      }
  
      gen->type = gen_type;
  
      return gen;
  
   err:
      if (!out)
          GENERAL_NAME_free(gen);
      return NULL;
  }
  
  GENERAL_NAME *v2i_GENERAL_NAME_ex(GENERAL_NAME *out,
                                    const X509V3_EXT_METHOD *method,
                                    X509V3_CTX *ctx, CONF_VALUE *cnf, int is_nc)
  {
      int type;
  
      char *name, *value;
  
      name = cnf->name;
      value = cnf->value;
  
      if (!value) {
          OPENSSL_PUT_ERROR(X509V3, X509V3_R_MISSING_VALUE);
          return NULL;
      }
  
      if (!name_cmp(name, "email"))
          type = GEN_EMAIL;
      else if (!name_cmp(name, "URI"))
          type = GEN_URI;
      else if (!name_cmp(name, "DNS"))
          type = GEN_DNS;
      else if (!name_cmp(name, "RID"))
          type = GEN_RID;
      else if (!name_cmp(name, "IP"))
          type = GEN_IPADD;
      else if (!name_cmp(name, "dirName"))
          type = GEN_DIRNAME;
      else if (!name_cmp(name, "otherName"))
          type = GEN_OTHERNAME;
      else {
          OPENSSL_PUT_ERROR(X509V3, X509V3_R_UNSUPPORTED_OPTION);
          ERR_add_error_data(2, "name=", name);
          return NULL;
      }
  
      return a2i_GENERAL_NAME(out, method, ctx, type, value, is_nc);
  
  }
  
  static int do_othername(GENERAL_NAME *gen, char *value, X509V3_CTX *ctx)
  {
      char *objtmp = NULL, *p;
      int objlen;
      if (!(p = strchr(value, ';')))
          return 0;
      if (!(gen->d.otherName = OTHERNAME_new()))
          return 0;
      /*
       * Free this up because we will overwrite it. no need to free type_id
       * because it is static
       */
      ASN1_TYPE_free(gen->d.otherName->value);
      if (!(gen->d.otherName->value = ASN1_generate_v3(p + 1, ctx)))
          return 0;
      objlen = p - value;
      objtmp = OPENSSL_malloc(objlen + 1);
      if (objtmp == NULL)
          return 0;
      BUF_strlcpy(objtmp, value, objlen + 1);
      gen->d.otherName->type_id = OBJ_txt2obj(objtmp, 0);
      OPENSSL_free(objtmp);
      if (!gen->d.otherName->type_id)
          return 0;
      return 1;
  }
  
  static int do_dirname(GENERAL_NAME *gen, char *value, X509V3_CTX *ctx)
  {
      int ret = 0;
      STACK_OF(CONF_VALUE) *sk = NULL;
      X509_NAME *nm = X509_NAME_new();
      if (nm == NULL)
          goto err;
      sk = X509V3_get_section(ctx, value);
      if (sk == NULL) {
          OPENSSL_PUT_ERROR(X509V3, X509V3_R_SECTION_NOT_FOUND);
          ERR_add_error_data(2, "section=", value);
          goto err;
      }
      /* FIXME: should allow other character types... */
      if (!X509V3_NAME_from_section(nm, sk, MBSTRING_ASC))
          goto err;
      gen->d.dirn = nm;
      ret = 1;
  
   err:
      if (!ret)
          X509_NAME_free(nm);
      X509V3_section_free(ctx, sk);
      return ret;
  }
  