/*

 * Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the Apache License 2.0 (the "License").  You may not use

 * this file except in compliance with the License.  You can obtain a copy

 * in the file LICENSE in the source distribution or at

 * https://www.openssl.org/source/license.html

 */

#ifdef OPENSSL_NO_CT

# error "CT is disabled"

#endif

#include "ct_local.h"

static char *i2s_poison(const X509V3_EXT_METHOD *method, void *val)

{

    return OPENSSL_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 ossl_v3_ct_scts[3] = {

    /* X509v3 extension in certificates that contains SCTs */

    { NID_ct_precert_scts, 0, NULL,

    NULL, (X509V3_EXT_FREE)SCT_LIST_free,

    (X509V3_EXT_D2I)x509_ext_d2i_SCT_LIST, (X509V3_EXT_I2D)i2d_SCT_LIST,

    NULL, NULL,

    NULL, NULL,

    (X509V3_EXT_I2R)i2r_SCT_LIST, NULL,

    NULL },

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

    { NID_ct_precert_poison, 0, ASN1_ITEM_ref(ASN1_NULL),

    NULL, NULL, NULL, NULL,

    i2s_poison, s2i_poison,

    NULL, NULL,

    NULL, NULL,

    NULL },

    /* OCSP extension that contains SCTs */

    { NID_ct_cert_scts, 0, NULL,

    0, (X509V3_EXT_FREE)SCT_LIST_free,

    (X509V3_EXT_D2I)ocsp_ext_d2i_SCT_LIST, (X509V3_EXT_I2D)i2d_SCT_LIST,

    NULL, NULL,

    NULL, NULL,

    (X509V3_EXT_I2R)i2r_SCT_LIST, NULL,

    NULL },

};