/* $OpenBSD: tasn_prn.c,v 1.22 2021/12/03 17:10:49 jsing Exp $ */

/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL

 * project 2000.

 */

/* ====================================================================

 * Copyright (c) 2000,2005 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 <stddef.h>

#include <openssl/asn1.h>

#include <openssl/asn1t.h>

#include <openssl/buffer.h>

#include <openssl/err.h>

#include <openssl/objects.h>

#include <openssl/x509v3.h>

#include "asn1_locl.h"

/* Print routines.

 */

/* ASN1_PCTX routines */

ASN1_PCTX default_pctx = {

  ASN1_PCTX_FLAGS_SHOW_ABSENT,  /* flags */

  0,        /* nm_flags */

  0,        /* cert_flags */

  0,        /* oid_flags */

  0       /* str_flags */

};

ASN1_PCTX *

ASN1_PCTX_new(void)

{

  ASN1_PCTX *p;

  if ((p = calloc(1, sizeof(ASN1_PCTX))) == NULL) {

    ASN1error(ERR_R_MALLOC_FAILURE);

    return NULL;

  }

  return p;

}

void

ASN1_PCTX_free(ASN1_PCTX *p)

{

  free(p);

}

unsigned long

ASN1_PCTX_get_flags(const ASN1_PCTX *p)

{

  return p->flags;

}

void

ASN1_PCTX_set_flags(ASN1_PCTX *p, unsigned long flags)

{

  p->flags = flags;

}

unsigned long

ASN1_PCTX_get_nm_flags(const ASN1_PCTX *p)

{

  return p->nm_flags;

}

void

ASN1_PCTX_set_nm_flags(ASN1_PCTX *p, unsigned long flags)

{

  p->nm_flags = flags;

}

unsigned long

ASN1_PCTX_get_cert_flags(const ASN1_PCTX *p)

{

  return p->cert_flags;

}

void

ASN1_PCTX_set_cert_flags(ASN1_PCTX *p, unsigned long flags)

{

  p->cert_flags = flags;

}

unsigned long

ASN1_PCTX_get_oid_flags(const ASN1_PCTX *p)

{

  return p->oid_flags;

}

void

ASN1_PCTX_set_oid_flags(ASN1_PCTX *p, unsigned long flags)

{

  p->oid_flags = flags;

}

unsigned long

ASN1_PCTX_get_str_flags(const ASN1_PCTX *p)

{

  return p->str_flags;

}

void

ASN1_PCTX_set_str_flags(ASN1_PCTX *p, unsigned long flags)

{

  p->str_flags = flags;

}

/* Main print routines */

static int asn1_item_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,

    const ASN1_ITEM *it, const char *fname, const char *sname, int nohdr,

    const ASN1_PCTX *pctx);

int asn1_template_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,

    const ASN1_TEMPLATE *tt, const ASN1_PCTX *pctx);

static int asn1_primitive_print(BIO *out, ASN1_VALUE **fld,

    const ASN1_ITEM *it, int indent, const char *fname, const char *sname,

    const ASN1_PCTX *pctx);

static int asn1_print_fsname(BIO *out, int indent, const char *fname,

    const char *sname, const ASN1_PCTX *pctx);

int

ASN1_item_print(BIO *out, ASN1_VALUE *ifld, int indent, const ASN1_ITEM *it,

    const ASN1_PCTX *pctx)

{

  const char *sname;

  if (pctx == NULL)

    pctx = &default_pctx;

  if (pctx->flags & ASN1_PCTX_FLAGS_NO_STRUCT_NAME)

    sname = NULL;

  else

    sname = it->sname;

  return asn1_item_print_ctx(out, &ifld, indent, it, NULL, sname,

      0, pctx);

}

static int

asn1_item_print_ctx(BIO *out, ASN1_VALUE **fld, int indent, const ASN1_ITEM *it,

    const char *fname, const char *sname, int nohdr, const ASN1_PCTX *pctx)

{

  const ASN1_TEMPLATE *tt;

  const ASN1_EXTERN_FUNCS *ef;

  ASN1_VALUE **tmpfld;

  const ASN1_AUX *aux = it->funcs;

  ASN1_aux_cb *asn1_cb;

  ASN1_PRINT_ARG parg;

  int i;

  if (aux && aux->asn1_cb) {

    parg.out = out;

    parg.indent = indent;

    parg.pctx = pctx;

    asn1_cb = aux->asn1_cb;

  } else

    asn1_cb = NULL;

  if ((it->itype != ASN1_ITYPE_PRIMITIVE ||

      it->utype != V_ASN1_BOOLEAN) && *fld == NULL) {

    if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_ABSENT) {

      if (!nohdr &&

          !asn1_print_fsname(out, indent, fname, sname, pctx))

        return 0;

      if (BIO_puts(out, "<ABSENT>\n") <= 0)

        return 0;

    }

    return 1;

  }

  switch (it->itype) {

  case ASN1_ITYPE_PRIMITIVE:

    if (it->templates) {

      if (!asn1_template_print_ctx(out, fld, indent,

          it->templates, pctx))

        return 0;

    }

    /* fall thru */

  case ASN1_ITYPE_MSTRING:

    if (!asn1_primitive_print(out, fld, it,

        indent, fname, sname, pctx))

      return 0;

    break;

  case ASN1_ITYPE_EXTERN:

    if (!nohdr &&

        !asn1_print_fsname(out, indent, fname, sname, pctx))

      return 0;

    /* Use new style print routine if possible */

    ef = it->funcs;

    if (ef && ef->asn1_ex_print) {

      i = ef->asn1_ex_print(out, fld, indent, "", pctx);

      if (!i)

        return 0;

      if ((i == 2) && (BIO_puts(out, "\n") <= 0))

        return 0;

      return 1;

    } else if (sname &&

        BIO_printf(out, ":EXTERNAL TYPE %s\n", sname) <= 0)

      return 0;

    break;

  case ASN1_ITYPE_CHOICE:

    /* CHOICE type, get selector */

    i = asn1_get_choice_selector(fld, it);

    /* This should never happen... */

    if ((i < 0) || (i >= it->tcount)) {

      if (BIO_printf(out,

          "ERROR: selector [%d] invalid\n", i) <= 0)

        return 0;

      return 1;

    }

    tt = it->templates + i;

    tmpfld = asn1_get_field_ptr(fld, tt);

    if (!asn1_template_print_ctx(out, tmpfld, indent, tt, pctx))

      return 0;

    break;

  case ASN1_ITYPE_SEQUENCE:

  case ASN1_ITYPE_NDEF_SEQUENCE:

    if (!nohdr &&

        !asn1_print_fsname(out, indent, fname, sname, pctx))

      return 0;

    if (fname || sname) {

      if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE) {

        if (BIO_puts(out, " {\n") <= 0)

          return 0;

      } else {

        if (BIO_puts(out, "\n") <= 0)

          return 0;

      }

    }

    if (asn1_cb) {

      i = asn1_cb(ASN1_OP_PRINT_PRE, fld, it, &parg);

      if (i == 0)

        return 0;

      if (i == 2)

        return 1;

    }

    /* Print each field entry */

    for (i = 0, tt = it->templates; i < it->tcount; i++, tt++) {

      const ASN1_TEMPLATE *seqtt;

      seqtt = asn1_do_adb(fld, tt, 1);

      if (seqtt == NULL)

        return 0;

      tmpfld = asn1_get_field_ptr(fld, seqtt);

      if (!asn1_template_print_ctx(out, tmpfld, indent + 2,

          seqtt, pctx))

        return 0;

    }

    if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE) {

      if (BIO_printf(out, "%*s}\n", indent, "") < 0)

        return 0;

    }

    if (asn1_cb) {

      i = asn1_cb(ASN1_OP_PRINT_POST, fld, it, &parg);

      if (i == 0)

        return 0;

    }

    break;

  default:

    BIO_printf(out, "Unprocessed type %d\n", it->itype);

    return 0;

  }

  return 1;

}

int

asn1_template_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,

    const ASN1_TEMPLATE *tt, const ASN1_PCTX *pctx)

{

  int i, flags;

  const char *sname, *fname;

  flags = tt->flags;

  if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME)

    sname = tt->item->sname;

  else

    sname = NULL;

  if (pctx->flags & ASN1_PCTX_FLAGS_NO_FIELD_NAME)

    fname = NULL;

  else

    fname = tt->field_name;

  if (flags & ASN1_TFLG_SK_MASK) {

    char *tname;

    ASN1_VALUE *skitem;

    STACK_OF(ASN1_VALUE) *stack;

    /* SET OF, SEQUENCE OF */

    if (fname) {

      if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SSOF) {

        if (flags & ASN1_TFLG_SET_OF)

          tname = "SET";

        else

          tname = "SEQUENCE";

        if (BIO_printf(out, "%*s%s OF %s {\n",

            indent, "", tname, tt->field_name) <= 0)

          return 0;

      } else if (BIO_printf(out, "%*s%s:\n", indent, "",

          fname) <= 0)

        return 0;

    }

    stack = (STACK_OF(ASN1_VALUE) *)*fld;

    for (i = 0; i < sk_ASN1_VALUE_num(stack); i++) {

      if ((i > 0) && (BIO_puts(out, "\n") <= 0))

        return 0;

      skitem = sk_ASN1_VALUE_value(stack, i);

      if (!asn1_item_print_ctx(out, &skitem, indent + 2,

          tt->item, NULL, NULL, 1, pctx))

        return 0;

    }

    if (!i && BIO_printf(out, "%*s<EMPTY>\n", indent + 2, "") <= 0)

      return 0;

    if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE) {

      if (BIO_printf(out, "%*s}\n", indent, "") <= 0)

        return 0;

    }

    return 1;

  }

  return asn1_item_print_ctx(out, fld, indent, tt->item,

      fname, sname, 0, pctx);

}

static int

asn1_print_fsname(BIO *out, int indent, const char *fname, const char *sname,

    const ASN1_PCTX *pctx)

{

  static char spaces[] = "                    ";

  const int nspaces = sizeof(spaces) - 1;

  while (indent > nspaces) {

    if (BIO_write(out, spaces, nspaces) != nspaces)

      return 0;

    indent -= nspaces;

  }

  if (BIO_write(out, spaces, indent) != indent)

    return 0;

  if (pctx->flags & ASN1_PCTX_FLAGS_NO_STRUCT_NAME)

    sname = NULL;

  if (pctx->flags & ASN1_PCTX_FLAGS_NO_FIELD_NAME)

    fname = NULL;

  if (!sname && !fname)

    return 1;

  if (fname) {

    if (BIO_puts(out, fname) <= 0)

      return 0;

  }

  if (sname) {

    if (fname) {

      if (BIO_printf(out, " (%s)", sname) <= 0)

        return 0;

    } else {

      if (BIO_puts(out, sname) <= 0)

        return 0;

    }

  }

  if (BIO_write(out, ": ", 2) != 2)

    return 0;

  return 1;

}

static int

asn1_print_boolean_ctx(BIO *out, int boolval, const ASN1_PCTX *pctx)

{

  const char *str;

  switch (boolval) {

  case -1:

    str = "BOOL ABSENT";

    break;

  case 0:

    str = "FALSE";

    break;

  default:

    str = "TRUE";

    break;

  }

  if (BIO_puts(out, str) <= 0)

    return 0;

  return 1;

}

static int

asn1_print_integer_ctx(BIO *out, ASN1_INTEGER *str, const ASN1_PCTX *pctx)

{

  char *s;

  int ret = 1;

  if ((s = i2s_ASN1_INTEGER(NULL, str)) == NULL)

    return 0;

  if (BIO_puts(out, s) <= 0)

    ret = 0;

  free(s);

  return ret;

}

static int

asn1_print_oid_ctx(BIO *out, const ASN1_OBJECT *oid, const ASN1_PCTX *pctx)

{

  char objbuf[80];

  const char *ln;

  ln = OBJ_nid2ln(OBJ_obj2nid(oid));

  if (!ln)

    ln = "";

  OBJ_obj2txt(objbuf, sizeof objbuf, oid, 1);

  if (BIO_printf(out, "%s (%s)", ln, objbuf) <= 0)

    return 0;

  return 1;

}

static int

asn1_print_obstring_ctx(BIO *out, ASN1_STRING *str, int indent,

    const ASN1_PCTX *pctx)

{

  if (str->type == V_ASN1_BIT_STRING) {

    if (BIO_printf(out, " (%ld unused bits)\n",

        str->flags & 0x7) <= 0)

      return 0;

  } else if (BIO_puts(out, "\n") <= 0)

    return 0;

  if ((str->length > 0) &&

      BIO_dump_indent(out, (char *)str->data, str->length,

      indent + 2) <= 0)

    return 0;

  return 1;

}

static int

asn1_primitive_print(BIO *out, ASN1_VALUE **fld, const ASN1_ITEM *it,

    int indent, const char *fname, const char *sname, const ASN1_PCTX *pctx)

{

  long utype;

  ASN1_STRING *str;

  int ret = 1, needlf = 1;

  const char *pname;

  if (!asn1_print_fsname(out, indent, fname, sname, pctx))

    return 0;

  if (it != NULL && it->funcs != NULL) {

    const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;

    if (pf->prim_print == NULL)

      return 0;

    return pf->prim_print(out, fld, it, indent, pctx);

  }

  if (it->itype == ASN1_ITYPE_MSTRING) {

    str = (ASN1_STRING *)*fld;

    utype = str->type & ~V_ASN1_NEG;

  } else {

    utype = it->utype;

    if (utype == V_ASN1_BOOLEAN)

      str = NULL;

    else

      str = (ASN1_STRING *)*fld;

  }

  if (utype == V_ASN1_ANY) {

    ASN1_TYPE *atype = (ASN1_TYPE *)*fld;

    utype = atype->type;

    fld = &atype->value.asn1_value;

    str = (ASN1_STRING *)*fld;

    if (pctx->flags & ASN1_PCTX_FLAGS_NO_ANY_TYPE)

      pname = NULL;

    else

      pname = ASN1_tag2str(utype);

  } else {

    if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_TYPE)

      pname = ASN1_tag2str(utype);

    else

      pname = NULL;

  }

  if (utype == V_ASN1_NULL) {

    if (BIO_puts(out, "NULL\n") <= 0)

      return 0;

    return 1;

  }

  if (pname) {

    if (BIO_puts(out, pname) <= 0)

      return 0;

    if (BIO_puts(out, ":") <= 0)

      return 0;

  }

  switch (utype) {

  case V_ASN1_BOOLEAN:

    {

      int boolval = *(int *)fld;

      if (boolval == -1)

        boolval = it->size;

      ret = asn1_print_boolean_ctx(out, boolval, pctx);

    }

    break;

  case V_ASN1_INTEGER:

  case V_ASN1_ENUMERATED:

    ret = asn1_print_integer_ctx(out, str, pctx);

    break;

  case V_ASN1_UTCTIME:

    ret = ASN1_UTCTIME_print(out, str);

    break;

  case V_ASN1_GENERALIZEDTIME:

    ret = ASN1_GENERALIZEDTIME_print(out, str);

    break;

  case V_ASN1_OBJECT:

    ret = asn1_print_oid_ctx(out, (const ASN1_OBJECT *)*fld, pctx);

    break;

  case V_ASN1_OCTET_STRING:

  case V_ASN1_BIT_STRING:

    ret = asn1_print_obstring_ctx(out, str, indent, pctx);

    needlf = 0;

    break;

  case V_ASN1_SEQUENCE:

  case V_ASN1_SET:

  case V_ASN1_OTHER:

    if (BIO_puts(out, "\n") <= 0)

      return 0;

    if (ASN1_parse_dump(out, str->data, str->length,

        indent, 0) <= 0)

      ret = 0;

    needlf = 0;

    break;

  default:

    ret = ASN1_STRING_print_ex(out, str, pctx->str_flags);

  }

  if (!ret)

    return 0;

  if (needlf && BIO_puts(out, "\n") <= 0)

    return 0;

  return 1;

}