/*  $OpenBSD: ct_x509v3.c,v 1.6 2021/12/25 15:42:32 tb Exp $ */

/*

 * Written by Rob Stradling (rob@comodo.com) and Stephen Henson

 * (steve@openssl.org) for the OpenSSL project 2014.

 */

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

 * Copyright (c) 2014 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).

 *

 */

#ifdef OPENSSL_NO_CT

# error "CT is disabled"

#endif

#include <string.h>

#include "ct_local.h"

static char *

i2s_poison(const X509V3_EXT_METHOD *method, void *val)

{

  return strdup("NULL");

}

static void *

s2i_poison(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx, const char *str)

{

  return ASN1_NULL_new();

}

static int

i2r_SCT_LIST(X509V3_EXT_METHOD *method, STACK_OF(SCT) *sct_list, BIO *out,

    int indent)

{

  SCT_LIST_print(sct_list, out, indent, "\n", NULL);

  return 1;

}

static int

set_sct_list_source(STACK_OF(SCT) *s, sct_source_t source)

{

  if (s != NULL) {

    int i;

    for (i = 0; i < sk_SCT_num(s); i++) {

      int res = SCT_set_source(sk_SCT_value(s, i), source);

      if (res != 1) {

        return 0;

      }

    }

  }

  return 1;

}

static STACK_OF(SCT) *

x509_ext_d2i_SCT_LIST(STACK_OF(SCT) **a, const unsigned char **pp, long len)

{

  STACK_OF(SCT) *s = d2i_SCT_LIST(a, pp, len);

  if (set_sct_list_source(s, SCT_SOURCE_X509V3_EXTENSION) != 1) {

    SCT_LIST_free(s);

    *a = NULL;

    return NULL;

  }

  return s;

}

static STACK_OF(SCT) *

ocsp_ext_d2i_SCT_LIST(STACK_OF(SCT) **a, const unsigned char **pp, long len)

{

  STACK_OF(SCT) *s = d2i_SCT_LIST(a, pp, len);

  if (set_sct_list_source(s, SCT_SOURCE_OCSP_STAPLED_RESPONSE) != 1) {

    SCT_LIST_free(s);

    *a = NULL;

    return NULL;

  }

  return s;

}

/* Handlers for X509v3/OCSP Certificate Transparency extensions */

const X509V3_EXT_METHOD v3_ct_scts[3] = {

  /* X509v3 extension in certificates that contains SCTs */

  [0] = {

    .ext_nid = NID_ct_precert_scts,

    .ext_flags = 0,

    .it = NULL,

    .ext_new = NULL,

    .ext_free = (X509V3_EXT_FREE)SCT_LIST_free,

    .d2i = (X509V3_EXT_D2I)x509_ext_d2i_SCT_LIST,

    .i2d = (X509V3_EXT_I2D)i2d_SCT_LIST,

    .i2s = NULL,

    .s2i = NULL,

    .i2v = NULL,

    .v2i = NULL,

    .i2r = (X509V3_EXT_I2R)i2r_SCT_LIST,

    .r2i = NULL,

    .usr_data = NULL,

  },

  /* X509v3 extension to mark a certificate as a pre-certificate */

  [1] = {

    .ext_nid = NID_ct_precert_poison,

    .ext_flags = 0,

    .it = &ASN1_NULL_it,

    .ext_new = NULL,

    .ext_free = NULL,

    .d2i = NULL,

    .i2d = NULL,

    .i2s = i2s_poison,

    .s2i = s2i_poison,

    .i2v = NULL,

    .v2i = NULL,

    .i2r = NULL,

    .r2i = NULL,

    .usr_data = NULL,

  },

  /* OCSP extension that contains SCTs */

  [2] = {

    .ext_nid = NID_ct_cert_scts,

    .ext_flags = 0,

    .it = NULL,

    .ext_new = NULL,

    .ext_free = (X509V3_EXT_FREE)SCT_LIST_free,

    .d2i = (X509V3_EXT_D2I)ocsp_ext_d2i_SCT_LIST,

    .i2d = (X509V3_EXT_I2D)i2d_SCT_LIST,

    .i2s = NULL,

    .s2i = NULL,

    .i2v = NULL,

    .v2i = NULL,

    .i2r = (X509V3_EXT_I2R)i2r_SCT_LIST,

    .r2i = NULL,

    .usr_data = NULL,

  },

};