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/*
* 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 <openssl/bio.h>
#include <openssl/conf.h>
#include <openssl/err.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include "fuzzer.h"
/*
* Repeated section references in the string-based extension APIs can cause
* quadratic output growth. Limit input size
* to keep individual fuzzing iterations small. See:
* https://github.com/google/boringssl/blob/f1f2556a5dfa59e147d9d47279cc3f7f8a18b433/fuzz/conf.cc#L22-L25
* https://issues.chromium.org/issues/42290485
*/
#define MAX_INPUT_SIZE (8 * 1024)
int FuzzerInitialize(int *argc, char ***argv)
{
return 1;
}
int FuzzerTestOneInput(const uint8_t *buf, size_t len)
{
BIO *in = NULL;
CONF *conf = NULL;
X509 *cert = NULL;
X509V3_CTX ctx;
if (len == 0)
return 0;
if (len > MAX_INPUT_SIZE)
len = MAX_INPUT_SIZE;
in = BIO_new(BIO_s_mem());
if (in == NULL)
goto end;
if ((size_t)BIO_write(in, buf, (int)len) != len)
goto end;
conf = NCONF_new(NULL);
if (conf == NULL)
goto end;
if (NCONF_load_bio(conf, in, NULL) <= 0)
goto end;
cert = X509_new();
if (cert != NULL) {
X509V3_set_ctx(&ctx, cert, cert, NULL, NULL, 0);
X509V3_set_nconf(&ctx, conf);
X509V3_EXT_add_nconf(conf, &ctx, "default", cert);
X509_free(cert);
}
cert = X509_new();
if (cert != NULL) {
X509V3_set_ctx(&ctx, NULL, NULL, NULL, NULL, 0);
X509V3_set_nconf(&ctx, conf);
X509V3_EXT_add_nconf(conf, &ctx, "default", cert);
}
end:
X509_free(cert);
NCONF_free(conf);
BIO_free(in);
ERR_clear_error();
return 0;
}
void FuzzerCleanup(void)
{
}
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