/* $OpenBSD: x509_prn.c,v 1.2 2021/11/01 20:53:08 tb Exp $ */

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

 * project 1999.

 */

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

 * Copyright (c) 1999 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).

 *

 */

/* X509 v3 extension utilities */

#include <stdio.h>

#include <openssl/conf.h>

#include <openssl/x509v3.h>

#include "x509_lcl.h"

/* Extension printing routines */

static int unknown_ext_print(BIO *out, X509_EXTENSION *ext, unsigned long flag,

    int indent, int supported);

/* Print out a name+value stack */

void

X509V3_EXT_val_prn(BIO *out, STACK_OF(CONF_VALUE) *val, int indent, int ml)

{

  int i;

  CONF_VALUE *nval;

  if (!val)

    return;

  if (!ml || !sk_CONF_VALUE_num(val)) {

    BIO_printf(out, "%*s", indent, "");

    if (!sk_CONF_VALUE_num(val))

      BIO_puts(out, "<EMPTY>\n");

  }

  for (i = 0; i < sk_CONF_VALUE_num(val); i++) {

    if (ml)

      BIO_printf(out, "%*s", indent, "");

    else if (i > 0) BIO_printf(out, ", ");

      nval = sk_CONF_VALUE_value(val, i);

    if (!nval->name)

      BIO_puts(out, nval->value);

    else if (!nval->value)

      BIO_puts(out, nval->name);

    else

      BIO_printf(out, "%s:%s", nval->name, nval->value);

    if (ml)

      BIO_puts(out, "\n");

  }

}

/* Main routine: print out a general extension */

int

X509V3_EXT_print(BIO *out, X509_EXTENSION *ext, unsigned long flag, int indent)

{

  void *ext_str = NULL;

  char *value = NULL;

  const unsigned char *p;

  const X509V3_EXT_METHOD *method;

  STACK_OF(CONF_VALUE) *nval = NULL;

  int ok = 1;

  if (!(method = X509V3_EXT_get(ext)))

    return unknown_ext_print(out, ext, flag, indent, 0);

  p = ext->value->data;

  if (method->it)

    ext_str = ASN1_item_d2i(NULL, &p, ext->value->length,

        method->it);

  else

    ext_str = method->d2i(NULL, &p, ext->value->length);

  if (!ext_str)

    return unknown_ext_print(out, ext, flag, indent, 1);

  if (method->i2s) {

    if (!(value = method->i2s(method, ext_str))) {

      ok = 0;

      goto err;

    }

    BIO_printf(out, "%*s%s", indent, "", value);

  } else if (method->i2v) {

    if (!(nval = method->i2v(method, ext_str, NULL))) {

      ok = 0;

      goto err;

    }

    X509V3_EXT_val_prn(out, nval, indent,

        method->ext_flags & X509V3_EXT_MULTILINE);

  } else if (method->i2r) {

    if (!method->i2r(method, ext_str, out, indent))

      ok = 0;

  } else

    ok = 0;

err:

  sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);

  free(value);

  if (method->it)

    ASN1_item_free(ext_str, method->it);

  else

    method->ext_free(ext_str);

  return ok;

}

int

X509V3_extensions_print(BIO *bp, const char *title,

    const STACK_OF(X509_EXTENSION) *exts, unsigned long flag, int indent)

{

  int i, j;

  if (sk_X509_EXTENSION_num(exts) <= 0)

    return 1;

  if (title) {

    BIO_printf(bp, "%*s%s:\n",indent, "", title);

    indent += 4;

  }

  for (i = 0; i < sk_X509_EXTENSION_num(exts); i++) {

    ASN1_OBJECT *obj;

    X509_EXTENSION *ex;

    ex = sk_X509_EXTENSION_value(exts, i);

    if (indent && BIO_printf(bp, "%*s",indent, "") <= 0)

      return 0;

    obj = X509_EXTENSION_get_object(ex);

    i2a_ASN1_OBJECT(bp, obj);

    j = X509_EXTENSION_get_critical(ex);

    if (BIO_printf(bp, ": %s\n",j?"critical":"") <= 0)

      return 0;

    if (!X509V3_EXT_print(bp, ex, flag, indent + 4)) {

      BIO_printf(bp, "%*s", indent + 4, "");

      ASN1_STRING_print(bp, ex->value);

    }

    if (BIO_write(bp, "\n",1) <= 0)

      return 0;

  }

  return 1;

}

static int

unknown_ext_print(BIO *out, X509_EXTENSION *ext, unsigned long flag,

    int indent, int supported)

{

  switch (flag & X509V3_EXT_UNKNOWN_MASK) {

  case X509V3_EXT_DEFAULT:

    return 0;

  case X509V3_EXT_ERROR_UNKNOWN:

    if (supported)

      BIO_printf(out, "%*s<Parse Error>", indent, "");

    else

      BIO_printf(out, "%*s<Not Supported>", indent, "");

    return 1;

  case X509V3_EXT_PARSE_UNKNOWN:

    return ASN1_parse_dump(out,

        ext->value->data, ext->value->length, indent, -1);

  case X509V3_EXT_DUMP_UNKNOWN:

    return BIO_dump_indent(out, (char *)ext->value->data,

        ext->value->length, indent);

  default:

    return 1;

  }

}

int

X509V3_EXT_print_fp(FILE *fp, X509_EXTENSION *ext, int flag, int indent)

{

  BIO *bio_tmp;

  int ret;

  if (!(bio_tmp = BIO_new_fp(fp, BIO_NOCLOSE)))

    return 0;

  ret = X509V3_EXT_print(bio_tmp, ext, flag, indent);

  BIO_free(bio_tmp);

  return ret;

}