text: /*
   * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
   *
   * Licensed under the OpenSSL license (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/x509v3.h>
  #include "ext_dat.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, const char *value, X509V3_CTX *ctx);
  static int do_dirname(GENERAL_NAME *gen, const char *value, X509V3_CTX *ctx);
  
  const X509V3_EXT_METHOD v3_alt[3] = {
      {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)
  {
      int 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;
                  strcat(oline, htmp);
                  if (i != 7)
                      strcat(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;
      int i;
  
      if ((gens = sk_GENERAL_NAME_new_null()) == NULL) {
          X509V3err(X509V3_F_V2I_ISSUER_ALT, 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") == 0) {
              if (!copy_issuer(ctx, gens))
                  goto err;
          } else {
              GENERAL_NAME *gen;
              if ((gen = v2i_GENERAL_NAME(method, ctx, cnf)) == NULL)
                  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;
  
      if (ctx && (ctx->flags == CTX_TEST))
          return 1;
      if (!ctx || !ctx->issuer_cert) {
          X509V3err(X509V3_F_COPY_ISSUER, 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)) == NULL
          || (ialt = X509V3_EXT_d2i(ext)) == NULL) {
          X509V3err(X509V3_F_COPY_ISSUER, X509V3_R_ISSUER_DECODE_ERROR);
          goto err;
      }
  
      for (i = 0; i < sk_GENERAL_NAME_num(ialt); i++) {
          gen = sk_GENERAL_NAME_value(ialt, i);
          if (!sk_GENERAL_NAME_push(gens, gen)) {
              X509V3err(X509V3_F_COPY_ISSUER, 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;
      int i;
  
      if ((gens = sk_GENERAL_NAME_new_null()) == NULL) {
          X509V3err(X509V3_F_V2I_SUBJECT_ALT, 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") == 0) {
              if (!copy_email(ctx, gens, 0))
                  goto err;
          } else if (!name_cmp(cnf->name, "email")
                     && cnf->value && strcmp(cnf->value, "move") == 0) {
              if (!copy_email(ctx, gens, 1))
                  goto err;
          } else {
              GENERAL_NAME *gen;
              if ((gen = v2i_GENERAL_NAME(method, ctx, cnf)) == NULL)
                  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 = -1;
  
      if (ctx != NULL && ctx->flags == CTX_TEST)
          return 1;
      if (ctx == NULL 
          || (ctx->subject_cert == NULL && ctx->subject_req == NULL)) {
          X509V3err(X509V3_F_COPY_EMAIL, 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 */
      while ((i = X509_NAME_get_index_by_NID(nm,
                                             NID_pkcs9_emailAddress, i)) >= 0) {
          ne = X509_NAME_get_entry(nm, i);
          email = ASN1_STRING_dup(X509_NAME_ENTRY_get_data(ne));
          if (move_p) {
              X509_NAME_delete_entry(nm, i);
              X509_NAME_ENTRY_free(ne);
              i--;
          }
          if (email == NULL || (gen = GENERAL_NAME_new()) == NULL) {
              X509V3err(X509V3_F_COPY_EMAIL, ERR_R_MALLOC_FAILURE);
              goto err;
          }
          gen->d.ia5 = email;
          email = NULL;
          gen->type = GEN_EMAIL;
          if (!sk_GENERAL_NAME_push(gens, gen)) {
              X509V3err(X509V3_F_COPY_EMAIL, ERR_R_MALLOC_FAILURE);
              goto err;
          }
          gen = NULL;
      }
  
      return 1;
  
   err:
      GENERAL_NAME_free(gen);
      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;
      int i;
  
      if ((gens = sk_GENERAL_NAME_new_null()) == NULL) {
          X509V3err(X509V3_F_V2I_GENERAL_NAMES, 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)) == NULL)
              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, const char *value,
                                 int is_nc)
  {
      char is_string = 0;
      GENERAL_NAME *gen = NULL;
  
      if (!value) {
          X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_MISSING_VALUE);
          return NULL;
      }
  
      if (out)
          gen = out;
      else {
          gen = GENERAL_NAME_new();
          if (gen == NULL) {
              X509V3err(X509V3_F_A2I_GENERAL_NAME, 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)) == NULL) {
                  X509V3err(X509V3_F_A2I_GENERAL_NAME, 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) {
              X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_BAD_IP_ADDRESS);
              ERR_add_error_data(2, "value=", value);
              goto err;
          }
          break;
  
      case GEN_DIRNAME:
          if (!do_dirname(gen, value, ctx)) {
              X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_DIRNAME_ERROR);
              goto err;
          }
          break;
  
      case GEN_OTHERNAME:
          if (!do_othername(gen, value, ctx)) {
              X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_OTHERNAME_ERROR);
              goto err;
          }
          break;
      default:
          X509V3err(X509V3_F_A2I_GENERAL_NAME, X509V3_R_UNSUPPORTED_TYPE);
          goto err;
      }
  
      if (is_string) {
          if ((gen->d.ia5 = ASN1_IA5STRING_new()) == NULL ||
              !ASN1_STRING_set(gen->d.ia5, (unsigned char *)value,
                               strlen(value))) {
              X509V3err(X509V3_F_A2I_GENERAL_NAME, 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) {
          X509V3err(X509V3_F_V2I_GENERAL_NAME_EX, 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 {
          X509V3err(X509V3_F_V2I_GENERAL_NAME_EX, 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, const char *value, X509V3_CTX *ctx)
  {
      char *objtmp = NULL, *p;
      int objlen;
  
      if ((p = strchr(value, ';')) == NULL)
          return 0;
      if ((gen->d.otherName = OTHERNAME_new()) == NULL)
          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)) == NULL)
          return 0;
      objlen = p - value;
      objtmp = OPENSSL_strndup(value, objlen);
      if (objtmp == NULL)
          return 0;
      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, const char *value, X509V3_CTX *ctx)
  {
      int ret = 0;
      STACK_OF(CONF_VALUE) *sk = NULL;
      X509_NAME *nm;
  
      if ((nm = X509_NAME_new()) == NULL)
          goto err;
      sk = X509V3_get_section(ctx, value);
      if (!sk) {
          X509V3err(X509V3_F_DO_DIRNAME, X509V3_R_SECTION_NOT_FOUND);
          ERR_add_error_data(2, "section=", value);
          goto err;
      }
      /* FIXME: should allow other character types... */
      ret = X509V3_NAME_from_section(nm, sk, MBSTRING_ASC);
      if (!ret)
          goto err;
      gen->d.dirn = nm;
  
  err:
      if (ret == 0)
          X509_NAME_free(nm);
      X509V3_section_free(ctx, sk);
      return ret;
  }
  