#include <assert.h>

#include <getopt.h>

#include <inttypes.h>

#include <stdio.h>

#include <string.h>

#include <strings.h>

#include <sys/select.h>

#include <sys/socket.h>

#include <sys/stat.h>

#include <sys/time.h>

#include <sys/types.h>

#include <unistd.h>

#include <openssl/err.h>

#include <openssl/evp.h>

#include <openssl/engine.h>

#include <openssl/pem.h>

#include "picotls.h"

#include "picotls/openssl.h"

#include "util.h"

void deterministic_random_bytes(void *buf, size_t len)

{

    for (int i = 0; i < len; i++) {

        ((uint8_t *)buf)[i] = 0;

    }

}

static int fake_ticket_cb(ptls_save_ticket_t *_self, ptls_t *tls, ptls_iovec_t src)

{

    return 0;

}

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)

{

    // key exchanges

    ptls_key_exchange_algorithm_t *key_exchanges[128] = {NULL};

    key_exchanges[0] = &ptls_openssl_secp256r1;

    ptls_cipher_suite_t *cipher_suites[] = {&ptls_openssl_aes128gcmsha256, NULL};

    // create ptls_context_t

    ptls_context_t ctx_client = {deterministic_random_bytes, &ptls_get_time, key_exchanges, cipher_suites};

    ctx_client.verify_certificate = NULL;

    // create pls_t

    ptls_t *tls_client = ptls_new(&ctx_client, 0); // 0: client

    // fake ticket saving

    static struct st_util_save_ticket_t st;

    st.super.cb = fake_ticket_cb;

    ctx_client.save_ticket = &st.super;

    // empty hsprop

    ptls_handshake_properties_t hsprop = {{{{NULL}}}};

    // buffers

    ptls_buffer_t client_encbuf;

    ptls_buffer_init(&client_encbuf, "", 0);

    // generate client_hello

    ptls_handshake(tls_client, &client_encbuf, NULL, 0, &hsprop);

    // reset buffer

    ptls_buffer_dispose(&client_encbuf);

    ptls_buffer_init(&client_encbuf, "", 0);

    // accept server

    size_t consumed = size;

    int ret = ptls_handshake(tls_client, &client_encbuf, data, &consumed, &hsprop);

    // more messages to parse?

    if (ret == 0 && size - consumed > 0) {

        size = size - consumed;

        // reset buffer

        ptls_buffer_dispose(&client_encbuf);

        ptls_buffer_init(&client_encbuf, "", 0);

        // receive messages

        ptls_receive(tls_client, &client_encbuf, data + consumed, &size);

    }

    // cleaning

    ptls_buffer_dispose(&client_encbuf);

    ptls_free(tls_client);

    return 0;

}