/*

 * Copyright 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 <limits.h>

#include <openssl/bio.h>

#include <openssl/err.h>

#include <openssl/pkcs7.h>

#include "fuzzer.h"

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

{

    return 1;

}

int FuzzerTestOneInput(const uint8_t *buf, size_t len)

{

    BIO *indata = NULL;

    BIO *out = NULL;

    PKCS7 *p7 = NULL;

    const unsigned char *in;

    size_t consumed;

    size_t remaining;

    if (len > LONG_MAX)

        return 0;

    in = buf;

    p7 = d2i_PKCS7(NULL, &in, (long)len);

    if (p7 == NULL)

        goto err;

    consumed = (size_t)(in - buf);

    remaining = len - consumed;

    if (remaining > INT_MAX)

        goto err;

    if (consumed < len) {

        indata = BIO_new_mem_buf(in, (int)remaining);

        if (indata == NULL)

            goto err;

    }

    out = BIO_new(BIO_s_null());

    if (out == NULL)

        goto err;

    PKCS7_verify(p7, NULL, NULL, indata, out, PKCS7_NOVERIFY);

err:

    BIO_free(out);

    PKCS7_free(p7);

    BIO_free(indata);

    ERR_clear_error();

    return 0;

}

void FuzzerCleanup(void)

{

}