/src/libressl/crypto/asn1/asn1_gen.c

Source (jump to first uncovered line)
/* $OpenBSD: asn1_gen.c,v 1.19 2022/05/24 19:56:13 tb Exp $ */
/* 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 <string.h>

#include <openssl/asn1.h>
#include <openssl/err.h>
#include <openssl/x509v3.h>

#include "asn1_locl.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(const 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(const 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 = 0;
  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) {
      ASN1error(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 = malloc(len);
  if (!new_der)
    goto err;

  /* 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) {
    if (asn1_tags.imp_class == V_ASN1_UNIVERSAL &&
        (asn1_tags.imp_tag == V_ASN1_SEQUENCE ||
        asn1_tags.imp_tag == V_ASN1_SET))
      hdr_constructed = V_ASN1_CONSTRUCTED;
    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:
  free(orig_der);
  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) {
    ASN1error(ASN1_R_UNKNOWN_TAG);
    ERR_asprintf_error_data("tag=%s", 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]) {
      ASN1error(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) {
      ASN1error(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 (vstart == NULL) {
      ASN1error(ASN1_R_ILLEGAL_FORMAT);
      return -1;
    }
    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", 7))
      arg->format = ASN1_GEN_FORMAT_BITLIST;
    else {
      ASN1error(ASN1_R_UNKOWN_FORMAT);
      return -1;
    }
    break;

  }

  return 1;
}

static int
parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass)
{
  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) {
    ASN1error(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:
      ASN1error(ASN1_R_INVALID_MODIFIER);
      ERR_asprintf_error_data("Char=%c", *eptr);
      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;
  STACK_OF(ASN1_TYPE) *sk = NULL;
  STACK_OF(CONF_VALUE) *sect = NULL;
  unsigned char *der = NULL;
  int derlen;
  int i;
  sk = sk_ASN1_TYPE_new_null();
  if (!sk)
    goto bad;
  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++) {
      ASN1_TYPE *typ = ASN1_generate_v3(
          sk_CONF_VALUE_value(sect, i)->value, cnf);
      if (!typ)
        goto bad;
      if (!sk_ASN1_TYPE_push(sk, typ))
        goto bad;
    }
  }

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

  if (utype == V_ASN1_SET)
    derlen = i2d_ASN1_SET_ANY(sk, &der);
  else
    derlen = i2d_ASN1_SEQUENCE_ANY(sk, &der);

  if (derlen < 0)
    goto bad;

  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:
  free(der);
  if (sk)
    sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);
  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) {
    ASN1error(ASN1_R_ILLEGAL_IMPLICIT_TAG);
    return 0;
  }

  if (arg->exp_count == ASN1_FLAG_EXP_MAX) {
    ASN1error(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 const 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),
    ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING),
    ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING),

    /* 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())) {
    ASN1error(ERR_R_MALLOC_FAILURE);
    return NULL;
  }

  if (!str)
    str = "";

  switch (utype) {

  case V_ASN1_NULL:
    if (str && *str) {
      ASN1error(ASN1_R_ILLEGAL_NULL_VALUE);
      goto bad_form;
    }
    break;

  case V_ASN1_BOOLEAN:
    if (format != ASN1_GEN_FORMAT_ASCII) {
      ASN1error(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)) {
      ASN1error(ASN1_R_ILLEGAL_BOOLEAN);
      goto bad_str;
    }
    break;

  case V_ASN1_INTEGER:
  case V_ASN1_ENUMERATED:
    if (format != ASN1_GEN_FORMAT_ASCII) {
      ASN1error(ASN1_R_INTEGER_NOT_ASCII_FORMAT);
      goto bad_form;
    }
    if (!(atmp->value.integer =
        s2i_ASN1_INTEGER(NULL, (char *)str))) {
      ASN1error(ASN1_R_ILLEGAL_INTEGER);
      goto bad_str;
    }
    break;

  case V_ASN1_OBJECT:
    if (format != ASN1_GEN_FORMAT_ASCII) {
      ASN1error(ASN1_R_OBJECT_NOT_ASCII_FORMAT);
      goto bad_form;
    }
    if (!(atmp->value.object = OBJ_txt2obj(str, 0))) {
      ASN1error(ASN1_R_ILLEGAL_OBJECT);
      goto bad_str;
    }
    break;

  case V_ASN1_UTCTIME:
  case V_ASN1_GENERALIZEDTIME:
    if (format != ASN1_GEN_FORMAT_ASCII) {
      ASN1error(ASN1_R_TIME_NOT_ASCII_FORMAT);
      goto bad_form;
    }
    if (!(atmp->value.asn1_string = ASN1_STRING_new())) {
      ASN1error(ERR_R_MALLOC_FAILURE);
      goto bad_str;
    }
    if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1)) {
      ASN1error(ERR_R_MALLOC_FAILURE);
      goto bad_str;
    }
    atmp->value.asn1_string->type = utype;
    if (!ASN1_TIME_check(atmp->value.asn1_string)) {
      ASN1error(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:
  case V_ASN1_NUMERICSTRING:

    if (format == ASN1_GEN_FORMAT_ASCII)
      format = MBSTRING_ASC;
    else if (format == ASN1_GEN_FORMAT_UTF8)
      format = MBSTRING_UTF8;
    else {
      ASN1error(ASN1_R_ILLEGAL_FORMAT);
      goto bad_form;
    }

    if (ASN1_mbstring_copy(&atmp->value.asn1_string,
        (unsigned char *)str, -1, format,
        ASN1_tag2bit(utype)) <= 0) {
      ASN1error(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())) {
      ASN1error(ERR_R_MALLOC_FAILURE);
      goto bad_form;
    }

    if (format == ASN1_GEN_FORMAT_HEX) {

      if (!(rdata = string_to_hex((char *)str, &rdlen))) {
        ASN1error(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) {
      if (ASN1_STRING_set(atmp->value.asn1_string, str,
          -1) == 0) {
        ASN1error(ERR_R_MALLOC_FAILURE);
        goto bad_str;
      }
    } else if ((format == ASN1_GEN_FORMAT_BITLIST) &&
        (utype == V_ASN1_BIT_STRING)) {
      if (!CONF_parse_list(str, ',', 1, bitstr_cb,
          atmp->value.bit_string)) {
        ASN1error(ASN1_R_LIST_ERROR);
        goto bad_str;
      }
      no_unused = 0;

    } else {
      ASN1error(ASN1_R_ILLEGAL_BITSTRING_FORMAT);
      goto bad_form;
    }

    if ((utype == V_ASN1_BIT_STRING) && no_unused) {
      if (!asn1_abs_set_unused_bits(atmp->value.asn1_string,
          0))
        goto bad_str;
    }

    break;

  default:
    ASN1error(ASN1_R_UNSUPPORTED_TYPE);
    goto bad_str;
    break;
  }

  atmp->type = utype;
  return atmp;

 bad_str:
  ERR_asprintf_error_data("string=%s", 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) {
    ASN1error(ASN1_R_INVALID_NUMBER);
    return 0;
  }
  if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1)) {
    ASN1error(ERR_R_MALLOC_FAILURE);
    return 0;
  }
  return 1;
}

Coverage Report

Created: 2022-08-24 06:30