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v3_alt.c

/* 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 "cryptlib.h"
#include <openssl/conf.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},
};

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:
            X509V3_add_value("othername","<unsupported>", &ret);
            break;

            case GEN_X400:
            X509V3_add_value("X400Name","<unsupported>", &ret);
            break;

            case GEN_EDIPARTY:
            X509V3_add_value("EdiPartyName","<unsupported>", &ret);
            break;

            case GEN_EMAIL:
            X509V3_add_value_uchar("email",gen->d.ia5->data, &ret);
            break;

            case GEN_DNS:
            X509V3_add_value_uchar("DNS",gen->d.ia5->data, &ret);
            break;

            case GEN_URI:
            X509V3_add_value_uchar("URI",gen->d.ia5->data, &ret);
            break;

            case GEN_DIRNAME:
            X509_NAME_oneline(gen->d.dirn, oline, 256);
            X509V3_add_value("DirName",oline, &ret);
            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
                  {
                  X509V3_add_value("IP Address","<invalid>", &ret);
                  break;
                  }
            X509V3_add_value("IP Address",oline, &ret);
            break;

            case GEN_RID:
            i2t_ASN1_OBJECT(oline, 256, gen->d.rid);
            X509V3_add_value("Registered ID",oline, &ret);
            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())) {
            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")) {
                  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;
      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)) ||
                        !(ialt = X509V3_EXT_d2i(ext)) ) {
            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())) {
            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")) {
                  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)) {
            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 */
      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);
                        i--;
                        }
            if(!email || !(gen = GENERAL_NAME_new())) {
                  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);
      M_ASN1_IA5STRING_free(email);
      return 0;
      
}

GENERAL_NAMES *v2i_GENERAL_NAMES(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())) {
            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))) 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(X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
                                           CONF_VALUE *cnf)
      {
      return v2i_GENERAL_NAME_ex(NULL, method, ctx, cnf, 0);
      }

GENERAL_NAME *v2i_GENERAL_NAME_ex(GENERAL_NAME *out,
                        X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
                                     CONF_VALUE *cnf, int is_nc)
      {
      char is_string = 0;
      int type;
      GENERAL_NAME *gen = NULL;

      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 (out)
            gen = out;
      else
            {
            gen = GENERAL_NAME_new();
            if(gen == NULL)
                  {
                  X509V3err(X509V3_F_V2I_GENERAL_NAME_EX,ERR_R_MALLOC_FAILURE);
                  return NULL;
                  }
            }

      if(!name_cmp(name, "email"))
            {
            is_string = 1;
            type = GEN_EMAIL;
            }
      else if(!name_cmp(name, "URI"))
            {
            is_string = 1;
            type = GEN_URI;
            }
      else if(!name_cmp(name, "DNS"))
            {
            is_string = 1;
            type = GEN_DNS;
            }
      else if(!name_cmp(name, "RID"))
            {
            ASN1_OBJECT *obj;
            if(!(obj = OBJ_txt2obj(value,0)))
                  {
                  X509V3err(X509V3_F_V2I_GENERAL_NAME_EX,X509V3_R_BAD_OBJECT);
                  ERR_add_error_data(2, "value=", value);
                  goto err;
                  }
            gen->d.rid = obj;
            type = GEN_RID;
            }
      else if(!name_cmp(name, "IP"))
            {
            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_V2I_GENERAL_NAME_EX,X509V3_R_BAD_IP_ADDRESS);
                  ERR_add_error_data(2, "value=", value);
                  goto err;
                  }
            type = GEN_IPADD;
            }
      else if(!name_cmp(name, "dirName"))
            {
            type = GEN_DIRNAME;
            if (!do_dirname(gen, value, ctx))
                  {
                  X509V3err(X509V3_F_V2I_GENERAL_NAME_EX,X509V3_R_DIRNAME_ERROR);
                  goto err;
                  }
            }
      else if(!name_cmp(name, "otherName"))
            {
            if (!do_othername(gen, value, ctx))
                  {
                  X509V3err(X509V3_F_V2I_GENERAL_NAME_EX,X509V3_R_OTHERNAME_ERROR);
                  goto err;
                  }
            type = GEN_OTHERNAME;
            }
      else
            {
            X509V3err(X509V3_F_V2I_GENERAL_NAME_EX,X509V3_R_UNSUPPORTED_OPTION);
            ERR_add_error_data(2, "name=", name);
            goto err;
            }

      if(is_string)
            {
            if(!(gen->d.ia5 = M_ASN1_IA5STRING_new()) ||
                        !ASN1_STRING_set(gen->d.ia5, (unsigned char*)value,
                                     strlen(value)))
                  {
                  X509V3err(X509V3_F_V2I_GENERAL_NAME_EX,ERR_R_MALLOC_FAILURE);
                  goto err;
                  }
            }

      gen->type = type;

      return gen;

      err:
      if (!out)
            GENERAL_NAME_free(gen);
      return NULL;
      }

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);
      strncpy(objtmp, value, objlen);
      objtmp[objlen] = 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, char *value, X509V3_CTX *ctx)
      {
      int ret;
      STACK_OF(CONF_VALUE) *sk;
      X509_NAME *nm;
      if (!(nm = X509_NAME_new()))
            return 0;
      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);
            X509_NAME_free(nm);
            return 0;
            }
      /* FIXME: should allow other character types... */
      ret = X509V3_NAME_from_section(nm, sk, MBSTRING_ASC);
      if (!ret)
            X509_NAME_free(nm);
      gen->d.dirn = nm;
            
      return ret;
      }

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