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asn1_gen.c

/* asn1_gen.c */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project 2002.
 */
/* ====================================================================
 * Copyright (c) 2002 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 "cryptlib.h"
#include <openssl/asn1.h>
#include <openssl/x509v3.h>

#define ASN1_GEN_FLAG         0x10000
#define ASN1_GEN_FLAG_IMP     (ASN1_GEN_FLAG|1)
#define ASN1_GEN_FLAG_EXP     (ASN1_GEN_FLAG|2)
#define ASN1_GEN_FLAG_TAG     (ASN1_GEN_FLAG|3)
#define ASN1_GEN_FLAG_BITWRAP (ASN1_GEN_FLAG|4)
#define ASN1_GEN_FLAG_OCTWRAP (ASN1_GEN_FLAG|5)
#define ASN1_GEN_FLAG_SEQWRAP (ASN1_GEN_FLAG|6)
#define ASN1_GEN_FLAG_SETWRAP (ASN1_GEN_FLAG|7)
#define ASN1_GEN_FLAG_FORMAT  (ASN1_GEN_FLAG|8)

#define ASN1_GEN_STR(str,val) {str, sizeof(str) - 1, val}

#define ASN1_FLAG_EXP_MAX     20

/* Input formats */

/* ASCII: default */
#define ASN1_GEN_FORMAT_ASCII 1
/* UTF8 */
#define ASN1_GEN_FORMAT_UTF8  2
/* Hex */
#define ASN1_GEN_FORMAT_HEX   3
/* List of bits */
#define ASN1_GEN_FORMAT_BITLIST     4


struct tag_name_st
      {
      const char *strnam;
      int len;
      int tag;
      };

typedef struct
      {
      int exp_tag;
      int exp_class;
      int exp_constructed;
      int exp_pad;
      long exp_len;
      } tag_exp_type;

typedef struct
      {
      int imp_tag;
      int imp_class;
      int utype;
      int format;
      const char *str;
      tag_exp_type exp_list[ASN1_FLAG_EXP_MAX];
      int exp_count;
      } tag_exp_arg;

static int bitstr_cb(const char *elem, int len, void *bitstr);
static int asn1_cb(const char *elem, int len, void *bitstr);
static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed, int exp_pad, int imp_ok);
static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass);
static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf);
static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype);
static int asn1_str2tag(const char *tagstr, int len);

ASN1_TYPE *ASN1_generate_nconf(char *str, CONF *nconf)
      {
      X509V3_CTX cnf;

      if (!nconf)
            return ASN1_generate_v3(str, NULL);

      X509V3_set_nconf(&cnf, nconf);
      return ASN1_generate_v3(str, &cnf);
      }

ASN1_TYPE *ASN1_generate_v3(char *str, X509V3_CTX *cnf)
      {
      ASN1_TYPE *ret;
      tag_exp_arg asn1_tags;
      tag_exp_type *etmp;

      int i, len;

      unsigned char *orig_der = NULL, *new_der = NULL;
      const unsigned char *cpy_start;
      unsigned char *p;
      const unsigned char *cp;
      int cpy_len;
      long hdr_len;
      int hdr_constructed = 0, hdr_tag, hdr_class;
      int r;

      asn1_tags.imp_tag = -1;
      asn1_tags.imp_class = -1;
      asn1_tags.format = ASN1_GEN_FORMAT_ASCII;
      asn1_tags.exp_count = 0;
      if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0)
            return NULL;

      if ((asn1_tags.utype == V_ASN1_SEQUENCE) || (asn1_tags.utype == V_ASN1_SET))
            {
            if (!cnf)
                  {
                  ASN1err(ASN1_F_ASN1_GENERATE_V3, ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG);
                  return NULL;
                  }
            ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf);
            }
      else
            ret = asn1_str2type(asn1_tags.str, asn1_tags.format, asn1_tags.utype);

      if (!ret)
            return NULL;

      /* If no tagging return base type */
      if ((asn1_tags.imp_tag == -1) && (asn1_tags.exp_count == 0))
            return ret;

      /* Generate the encoding */
      cpy_len = i2d_ASN1_TYPE(ret, &orig_der);
      ASN1_TYPE_free(ret);
      ret = NULL;
      /* Set point to start copying for modified encoding */
      cpy_start = orig_der;

      /* Do we need IMPLICIT tagging? */
      if (asn1_tags.imp_tag != -1)
            {
            /* If IMPLICIT we will replace the underlying tag */
            /* Skip existing tag+len */
            r = ASN1_get_object(&cpy_start, &hdr_len, &hdr_tag, &hdr_class, cpy_len);
            if (r & 0x80)
                  goto err;
            /* Update copy length */
            cpy_len -= cpy_start - orig_der;
            /* For IMPLICIT tagging the length should match the
             * original length and constructed flag should be
             * consistent.
             */
            if (r & 0x1)
                  {
                  /* Indefinite length constructed */
                  hdr_constructed = 2;
                  hdr_len = 0;
                  }
            else
                  /* Just retain constructed flag */
                  hdr_constructed = r & V_ASN1_CONSTRUCTED;
            /* Work out new length with IMPLICIT tag: ignore constructed
             * because it will mess up if indefinite length
             */
            len = ASN1_object_size(0, hdr_len, asn1_tags.imp_tag);
            }
      else
            len = cpy_len;

      /* Work out length in any EXPLICIT, starting from end */

      for(i = 0, etmp = asn1_tags.exp_list + asn1_tags.exp_count - 1; i < asn1_tags.exp_count; i++, etmp--)
            {
            /* Content length: number of content octets + any padding */
            len += etmp->exp_pad;
            etmp->exp_len = len;
            /* Total object length: length including new header */
            len = ASN1_object_size(0, len, etmp->exp_tag);
            }

      /* Allocate buffer for new encoding */

      new_der = OPENSSL_malloc(len);

      /* Generate tagged encoding */

      p = new_der;

      /* Output explicit tags first */

      for (i = 0, etmp = asn1_tags.exp_list; i < asn1_tags.exp_count; i++, etmp++)
            {
            ASN1_put_object(&p, etmp->exp_constructed, etmp->exp_len,
                              etmp->exp_tag, etmp->exp_class);
            if (etmp->exp_pad)
                  *p++ = 0;
            }

      /* If IMPLICIT, output tag */

      if (asn1_tags.imp_tag != -1)
            ASN1_put_object(&p, hdr_constructed, hdr_len,
                              asn1_tags.imp_tag, asn1_tags.imp_class);

      /* Copy across original encoding */
      memcpy(p, cpy_start, cpy_len);

      cp = new_der;

      /* Obtain new ASN1_TYPE structure */
      ret = d2i_ASN1_TYPE(NULL, &cp, len);

      err:
      if (orig_der)
            OPENSSL_free(orig_der);
      if (new_der)
            OPENSSL_free(new_der);

      return ret;

      }

static int asn1_cb(const char *elem, int len, void *bitstr)
      {
      tag_exp_arg *arg = bitstr;
      int i;
      int utype;
      int vlen = 0;
      const char *p, *vstart = NULL;

      int tmp_tag, tmp_class;

      for(i = 0, p = elem; i < len; p++, i++)
            {
            /* Look for the ':' in name value pairs */
            if (*p == ':')
                  {
                  vstart = p + 1;
                  vlen = len - (vstart - elem);
                  len = p - elem;
                  break;
                  }
            }

      utype = asn1_str2tag(elem, len);

      if (utype == -1)
            {
            ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_TAG);
            ERR_add_error_data(2, "tag=", elem);
            return -1;
            }

      /* If this is not a modifier mark end of string and exit */
      if (!(utype & ASN1_GEN_FLAG))
            {
            arg->utype = utype;
            arg->str = vstart;
            /* If no value and not end of string, error */
            if (!vstart && elem[len])
                  {
                  ASN1err(ASN1_F_ASN1_CB, ASN1_R_MISSING_VALUE);
                  return -1;
                  }
            return 0;
            }

      switch(utype)
            {

            case ASN1_GEN_FLAG_IMP:
            /* Check for illegal multiple IMPLICIT tagging */
            if (arg->imp_tag != -1)
                  {
                  ASN1err(ASN1_F_ASN1_CB, ASN1_R_ILLEGAL_NESTED_TAGGING);
                  return -1;
                  }
            if (!parse_tagging(vstart, vlen, &arg->imp_tag, &arg->imp_class))
                  return -1;
            break;

            case ASN1_GEN_FLAG_EXP:

            if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class))
                  return -1;
            if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0))
                  return -1;
            break;

            case ASN1_GEN_FLAG_SEQWRAP:
            if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1))
                  return -1;
            break;

            case ASN1_GEN_FLAG_SETWRAP:
            if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1))
                  return -1;
            break;

            case ASN1_GEN_FLAG_BITWRAP:
            if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1))
                  return -1;
            break;

            case ASN1_GEN_FLAG_OCTWRAP:
            if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1))
                  return -1;
            break;

            case ASN1_GEN_FLAG_FORMAT:
            if (!strncmp(vstart, "ASCII", 5))
                  arg->format = ASN1_GEN_FORMAT_ASCII;
            else if (!strncmp(vstart, "UTF8", 4))
                  arg->format = ASN1_GEN_FORMAT_UTF8;
            else if (!strncmp(vstart, "HEX", 3))
                  arg->format = ASN1_GEN_FORMAT_HEX;
            else if (!strncmp(vstart, "BITLIST", 3))
                  arg->format = ASN1_GEN_FORMAT_BITLIST;
            else
                  {
                  ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKOWN_FORMAT);
                  return -1;
                  }
            break;

            }

      return 1;

      }

static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass)
      {
      char erch[2];
      long tag_num;
      char *eptr;
      if (!vstart)
            return 0;
      tag_num = strtoul(vstart, &eptr, 10);
      /* Check we haven't gone past max length: should be impossible */
      if (eptr && *eptr && (eptr > vstart + vlen))
            return 0;
      if (tag_num < 0)
            {
            ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_NUMBER);
            return 0;
            }
      *ptag = tag_num;
      /* If we have non numeric characters, parse them */
      if (eptr)
            vlen -= eptr - vstart;
      else 
            vlen = 0;
      if (vlen)
            {
            switch (*eptr)
                  {

                  case 'U':
                  *pclass = V_ASN1_UNIVERSAL;
                  break;

                  case 'A':
                  *pclass = V_ASN1_APPLICATION;
                  break;

                  case 'P':
                  *pclass = V_ASN1_PRIVATE;
                  break;

                  case 'C':
                  *pclass = V_ASN1_CONTEXT_SPECIFIC;
                  break;

                  default:
                  erch[0] = *eptr;
                  erch[1] = 0;
                  ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_MODIFIER);
                  ERR_add_error_data(2, "Char=", erch);
                  return 0;
                  break;

                  }
            }
      else
            *pclass = V_ASN1_CONTEXT_SPECIFIC;

      return 1;

      }

/* Handle multiple types: SET and SEQUENCE */

static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf)
      {
      ASN1_TYPE *ret = NULL, *typ = NULL;
      STACK_OF(ASN1_TYPE) *sk = NULL;
      STACK_OF(CONF_VALUE) *sect = NULL;
      unsigned char *der = NULL, *p;
      int derlen;
      int i, is_set;
      sk = sk_ASN1_TYPE_new_null();
      if (section)
            {
            if (!cnf)
                  goto bad;
            sect = X509V3_get_section(cnf, (char *)section);
            if (!sect)
                  goto bad;
            for (i = 0; i < sk_CONF_VALUE_num(sect); i++)
                  {
                  typ = ASN1_generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf);
                  if (!typ)
                        goto bad;
                  sk_ASN1_TYPE_push(sk, typ);
                  typ = NULL;
                  }
            }

      /* Now we has a STACK of the components, convert to the correct form */

      if (utype == V_ASN1_SET)
            is_set = 1;
      else
            is_set = 0;


      derlen = i2d_ASN1_SET_OF_ASN1_TYPE(sk, NULL, i2d_ASN1_TYPE, utype,
                                 V_ASN1_UNIVERSAL, is_set);
      der = OPENSSL_malloc(derlen);
      p = der;
      i2d_ASN1_SET_OF_ASN1_TYPE(sk, &p, i2d_ASN1_TYPE, utype,
                          V_ASN1_UNIVERSAL, is_set);

      if (!(ret = ASN1_TYPE_new()))
            goto bad;

      if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype)))
            goto bad;

      ret->type = utype;

      ret->value.asn1_string->data = der;
      ret->value.asn1_string->length = derlen;

      der = NULL;

      bad:

      if (der)
            OPENSSL_free(der);

      if (sk)
            sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);
      if (typ)
            ASN1_TYPE_free(typ);
      if (sect)
            X509V3_section_free(cnf, sect);

      return ret;
      }

static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed, int exp_pad, int imp_ok)
      {
      tag_exp_type *exp_tmp;
      /* Can only have IMPLICIT if permitted */
      if ((arg->imp_tag != -1) && !imp_ok)
            {
            ASN1err(ASN1_F_APPEND_EXP, ASN1_R_ILLEGAL_IMPLICIT_TAG);
            return 0;
            }

      if (arg->exp_count == ASN1_FLAG_EXP_MAX)
            {
            ASN1err(ASN1_F_APPEND_EXP, ASN1_R_DEPTH_EXCEEDED);
            return 0;
            }

      exp_tmp = &arg->exp_list[arg->exp_count++];

      /* If IMPLICIT set tag to implicit value then
       * reset implicit tag since it has been used.
       */
      if (arg->imp_tag != -1)
            {
            exp_tmp->exp_tag = arg->imp_tag;
            exp_tmp->exp_class = arg->imp_class;
            arg->imp_tag = -1;
            arg->imp_class = -1;
            }
      else
            {
            exp_tmp->exp_tag = exp_tag;
            exp_tmp->exp_class = exp_class;
            }
      exp_tmp->exp_constructed = exp_constructed;
      exp_tmp->exp_pad = exp_pad;

      return 1;
      }


static int asn1_str2tag(const char *tagstr, int len)
      {
      unsigned int i;
      static struct tag_name_st *tntmp, tnst [] = {
            ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN),
            ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN),
            ASN1_GEN_STR("NULL", V_ASN1_NULL),
            ASN1_GEN_STR("INT", V_ASN1_INTEGER),
            ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER),
            ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED),
            ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED),
            ASN1_GEN_STR("OID", V_ASN1_OBJECT),
            ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT),
            ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME),
            ASN1_GEN_STR("UTC", V_ASN1_UTCTIME),
            ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME),
            ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME),
            ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING),
            ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING),
            ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING),
            ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING),
            ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING),
            ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING),
            ASN1_GEN_STR("IA5", V_ASN1_IA5STRING),
            ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING),
            ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING),
            ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING),
            ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING),
            ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING),
            ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING),
            ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING),
            ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING),
            ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING),
            ASN1_GEN_STR("T61", V_ASN1_T61STRING),
            ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING),
            ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING),
            ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING),
            ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING),

            /* Special cases */
            ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE),
            ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE),
            ASN1_GEN_STR("SET", V_ASN1_SET),
            /* type modifiers */
            /* Explicit tag */
            ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP),
            ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP),
            /* Implicit tag */
            ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP),
            ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP),
            /* OCTET STRING wrapper */
            ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP),
            /* SEQUENCE wrapper */
            ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP),
            /* SET wrapper */
            ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP),
            /* BIT STRING wrapper */
            ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP),
            ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT),
            ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT),
      };

      if (len == -1)
            len = strlen(tagstr);
      
      tntmp = tnst;     
      for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); i++, tntmp++)
            {
            if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len))
                  return tntmp->tag;
            }
      
      return -1;
      }

static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype)
      {
      ASN1_TYPE *atmp = NULL;

      CONF_VALUE vtmp;

      unsigned char *rdata;
      long rdlen;

      int no_unused = 1;

      if (!(atmp = ASN1_TYPE_new()))
            {
            ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
            return NULL;
            }

      if (!str)
            str = "";

      switch(utype)
            {

            case V_ASN1_NULL:
            if (str && *str)
                  {
                  ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_NULL_VALUE);
                  goto bad_form;
                  }
            break;
            
            case V_ASN1_BOOLEAN:
            if (format != ASN1_GEN_FORMAT_ASCII)
                  {
                  ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_NOT_ASCII_FORMAT);
                  goto bad_form;
                  }
            vtmp.name = NULL;
            vtmp.section = NULL;
            vtmp.value = (char *)str;
            if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean))
                  {
                  ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BOOLEAN);
                  goto bad_str;
                  }
            break;

            case V_ASN1_INTEGER:
            case V_ASN1_ENUMERATED:
            if (format != ASN1_GEN_FORMAT_ASCII)
                  {
                  ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_INTEGER_NOT_ASCII_FORMAT);
                  goto bad_form;
                  }
            if (!(atmp->value.integer = s2i_ASN1_INTEGER(NULL, (char *)str)))
                  {
                  ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_INTEGER);
                  goto bad_str;
                  }
            break;

            case V_ASN1_OBJECT:
            if (format != ASN1_GEN_FORMAT_ASCII)
                  {
                  ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_OBJECT_NOT_ASCII_FORMAT);
                  goto bad_form;
                  }
            if (!(atmp->value.object = OBJ_txt2obj(str, 0)))
                  {
                  ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_OBJECT);
                  goto bad_str;
                  }
            break;

            case V_ASN1_UTCTIME:
            case V_ASN1_GENERALIZEDTIME:
            if (format != ASN1_GEN_FORMAT_ASCII)
                  {
                  ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_TIME_NOT_ASCII_FORMAT);
                  goto bad_form;
                  }
            if (!(atmp->value.asn1_string = ASN1_STRING_new()))
                  {
                  ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
                  goto bad_str;
                  }
            if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1))
                  {
                  ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
                  goto bad_str;
                  }
            atmp->value.asn1_string->type = utype;
            if (!ASN1_TIME_check(atmp->value.asn1_string))
                  {
                  ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_TIME_VALUE);
                  goto bad_str;
                  }

            break;

            case V_ASN1_BMPSTRING:
            case V_ASN1_PRINTABLESTRING:
            case V_ASN1_IA5STRING:
            case V_ASN1_T61STRING:
            case V_ASN1_UTF8STRING:
            case V_ASN1_VISIBLESTRING:
            case V_ASN1_UNIVERSALSTRING:
            case V_ASN1_GENERALSTRING:

            if (format == ASN1_GEN_FORMAT_ASCII)
                  format = MBSTRING_ASC;
            else if (format == ASN1_GEN_FORMAT_UTF8)
                  format = MBSTRING_UTF8;
            else
                  {
                  ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_FORMAT);
                  goto bad_form;
                  }


            if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str,
                                    -1, format, ASN1_tag2bit(utype)) <= 0)
                  {
                  ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
                  goto bad_str;
                  }
            

            break;

            case V_ASN1_BIT_STRING:

            case V_ASN1_OCTET_STRING:

            if (!(atmp->value.asn1_string = ASN1_STRING_new()))
                  {
                  ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
                  goto bad_form;
                  }

            if (format == ASN1_GEN_FORMAT_HEX)
                  {

                  if (!(rdata = string_to_hex((char *)str, &rdlen)))
                        {
                        ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_HEX);
                        goto bad_str;
                        }

                  atmp->value.asn1_string->data = rdata;
                  atmp->value.asn1_string->length = rdlen;
                  atmp->value.asn1_string->type = utype;

                  }
            else if (format == ASN1_GEN_FORMAT_ASCII)
                  ASN1_STRING_set(atmp->value.asn1_string, str, -1);
            else if ((format == ASN1_GEN_FORMAT_BITLIST) && (utype == V_ASN1_BIT_STRING))
                  {
                  if (!CONF_parse_list(str, ',', 1, bitstr_cb, atmp->value.bit_string))
                        {
                        ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_LIST_ERROR);
                        goto bad_str;
                        }
                  no_unused = 0;
                  
                  }
            else 
                  {
                  ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BITSTRING_FORMAT);
                  goto bad_form;
                  }

            if ((utype == V_ASN1_BIT_STRING) && no_unused)
                  {
                  atmp->value.asn1_string->flags
                        &= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
                  atmp->value.asn1_string->flags
                        |= ASN1_STRING_FLAG_BITS_LEFT;
                  }


            break;

            default:
            ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_UNSUPPORTED_TYPE);
            goto bad_str;
            break;
            }


      atmp->type = utype;
      return atmp;


      bad_str:
      ERR_add_error_data(2, "string=", str);
      bad_form:

      ASN1_TYPE_free(atmp);
      return NULL;

      }

static int bitstr_cb(const char *elem, int len, void *bitstr)
      {
      long bitnum;
      char *eptr;
      if (!elem)
            return 0;
      bitnum = strtoul(elem, &eptr, 10);
      if (eptr && *eptr && (eptr != elem + len))
            return 0;
      if (bitnum < 0)
            {
            ASN1err(ASN1_F_BITSTR_CB, ASN1_R_INVALID_NUMBER);
            return 0;
            }
      if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1))
            {
            ASN1err(ASN1_F_BITSTR_CB, ERR_R_MALLOC_FAILURE);
            return 0;
            }
      return 1;
      }


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