/*

 * Copyright 2023-2026 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 may obtain a copy of the License at

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

 * or in the file LICENSE in the source distribution.

 */

#include "fuzzer.h"

#include <openssl/err.h>

#include <openssl/pkcs7.h>

#include <openssl/x509.h>

#include <stdio.h>

int FuzzerInitialize(int *argc, char ***argv)

{

    return 1;

}

int FuzzerTestOneInput(const uint8_t *buf, size_t len)

{

    BIO *b;

    PKCS7 *p7;

    if (len > INT_MAX)

        return 0;

    b = BIO_new_mem_buf(buf, (int)len);

    if (b == NULL) {

        ERR_clear_error();

        return 0;

    }

    p7 = SMIME_read_PKCS7(b, NULL);

    if (p7 != NULL) {

        STACK_OF(PKCS7_SIGNER_INFO) *p7si = PKCS7_get_signer_info(p7);

        int i;

        for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(p7si); i++) {

            STACK_OF(X509_ALGOR) *algs;

            PKCS7_cert_from_signer_info(p7,

                sk_PKCS7_SIGNER_INFO_value(p7si, i));

            algs = PKCS7_get_smimecap(sk_PKCS7_SIGNER_INFO_value(p7si, i));

            sk_X509_ALGOR_pop_free(algs, X509_ALGOR_free);

        }

        PKCS7_free(p7);

    }

    BIO_free(b);

    ERR_clear_error();

    return 0;

}

void FuzzerCleanup(void)

{

}