/* testsuite.c
 *
 * Copyright (C) 2006-2021 wolfSSL Inc.
 *
 * This file is part of wolfSSL.
 *
 * wolfSSL is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * wolfSSL is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
 */


#ifdef HAVE_CONFIG_H
    #include <config.h>
#endif

#include <wolfssl/wolfcrypt/settings.h>

#include <wolfssl/ssl.h>
#include <wolfssl/test.h>
#include <wolfcrypt/test/test.h>


#ifndef SINGLE_THREADED

#ifdef OPENSSL_EXTRA
#include <wolfssl/openssl/ssl.h>
#endif
#include <wolfssl/wolfcrypt/sha256.h>
#include <wolfssl/wolfcrypt/ecc.h>

#include <examples/echoclient/echoclient.h>
#include <examples/echoserver/echoserver.h>
#include <examples/server/server.h>
#include <examples/client/client.h>


#ifndef NO_SHA256
void file_test(const char* file, byte* hash);
#endif

#if !defined(NO_WOLFSSL_SERVER) && !defined(NO_WOLFSSL_CLIENT)

#ifdef HAVE_STACK_SIZE
static THREAD_RETURN simple_test(func_args*);
#else
static void simple_test(func_args*);
#endif
static int test_tls(func_args* server_args);
static void show_ciphers(void);
static void cleanup_output(void);
static int validate_cleanup_output(void);

enum {
    NUMARGS = 3
};

static const char *outputName;
#endif

int myoptind = 0;
char* myoptarg = NULL;

#ifndef NO_TESTSUITE_MAIN_DRIVER

    static int testsuite_test(int argc, char** argv);

    int main(int argc, char** argv)
    {
        return testsuite_test(argc, argv);
    }

#endif /* NO_TESTSUITE_MAIN_DRIVER */

#ifdef HAVE_STACK_SIZE
/* Wrap TLS echo client to free thread locals. */
static void *echoclient_test_wrapper(void* args) {
    echoclient_test(args);

#if defined(HAVE_ECC) && defined(FP_ECC) && defined(HAVE_THREAD_LS)
    wc_ecc_fp_free();  /* free per thread cache */
#endif

    return (void *)0;
}
#endif

int testsuite_test(int argc, char** argv)
{
#if !defined(NO_WOLFSSL_SERVER) && !defined(NO_WOLFSSL_CLIENT)
    func_args server_args;

    tcp_ready ready;
    THREAD_TYPE serverThread;

#ifndef USE_WINDOWS_API
    char tempName[] = "/tmp/output-XXXXXX";
    int len = 18;
    int num = 6;
#else
    char tempName[] = "fnXXXXXX";
    int len = 8;
    int num = 6;
#endif
#ifdef HAVE_STACK_SIZE
    void *serverThreadStackContext = NULL;
#endif
    int ret;

#ifdef HAVE_WNR
    if (wc_InitNetRandom(wnrConfig, NULL, 5000) != 0) {
        err_sys("Whitewood netRandom global config failed");
        return -1237;
    }
#endif /* HAVE_WNR */

    StartTCP();

    server_args.argc = argc;
    server_args.argv = argv;

    wolfSSL_Init();
#if defined(DEBUG_WOLFSSL) && !defined(HAVE_VALGRIND)
    wolfSSL_Debugging_ON();
#endif
#ifdef WC_RNG_SEED_CB
    wc_SetSeed_Cb(wc_GenerateSeed);
#endif

#if !defined(WOLFSSL_TIRTOS)
    ChangeToWolfRoot();
#endif

#ifdef WOLFSSL_TIRTOS
    fdOpenSession(Task_self());
#endif

    server_args.signal = &ready;
    InitTcpReady(&ready);

#ifndef NO_CRYPT_TEST
    /* wc_ test */
    #ifdef HAVE_STACK_SIZE
        StackSizeCheck(&server_args, wolfcrypt_test);
    #else
        wolfcrypt_test(&server_args);
    #endif
    if (server_args.return_code != 0) return server_args.return_code;
#endif

    /* Simple wolfSSL client server test */
    #ifdef HAVE_STACK_SIZE
        StackSizeCheck(&server_args, (THREAD_RETURN (*)(void *))simple_test);
    #else
        simple_test(&server_args);
    #endif
    if (server_args.return_code != 0) return server_args.return_code;
#if !defined(NETOS)
    /* Echo input wolfSSL client server test */
    #ifdef HAVE_STACK_SIZE
        StackSizeCheck_launch(&server_args, echoserver_test, &serverThread,
                              &serverThreadStackContext);
    #else
        start_thread(echoserver_test, &server_args, &serverThread);
    #endif

    /* Create unique file name */
    outputName = mymktemp(tempName, len, num);
    if (outputName == NULL) {
        printf("Could not create unique file name");
        return EXIT_FAILURE;
    }

    ret = test_tls(&server_args);
    if (ret != 0) {
        cleanup_output();
        return ret;
    }

    /* Server won't quit unless TLS test has worked. */
#ifdef HAVE_STACK_SIZE
    fputs("reaping echoserver_test: ", stdout);
    StackSizeCheck_reap(serverThread, serverThreadStackContext);
#else
    join_thread(serverThread);
#endif
    if (server_args.return_code != 0) {
        cleanup_output();
        return server_args.return_code;
    }
#endif /* !NETOS */

    show_ciphers();

#if !defined(NETOS)
    ret = validate_cleanup_output();
    if (ret != 0)
        return EXIT_FAILURE;
#endif

    wolfSSL_Cleanup();
    FreeTcpReady(&ready);

#ifdef WOLFSSL_TIRTOS
    fdCloseSession(Task_self());
#endif

#ifdef HAVE_WNR
    if (wc_FreeNetRandom() < 0)
        err_sys("Failed to free netRandom context");
#endif /* HAVE_WNR */

    printf("\nAll tests passed!\n");

#else
    (void)argc;
    (void)argv;
#endif /* !NO_WOLFSSL_SERVER && !NO_WOLFSSL_CLIENT */

    return EXIT_SUCCESS;
}

#if !defined(NO_WOLFSSL_SERVER) && !defined(NO_WOLFSSL_CLIENT)
/* Perform a basic TLS handshake.
 *
 * First connection to echo a file.
 * Second to tell TLS server to quit.
 *
 * @param [in,out] server_args   Object sent to server thread.
 * @return  0 on success.
 * @return  echoclient error return code on failure.
 */
static int test_tls(func_args* server_args)
{
    func_args echo_args;
    char* myArgv[NUMARGS];
    char arg[3][32];

    /* Set up command line arguments for echoclient to send input file
     * and write echoed data to temporary output file. */
    myArgv[0] = arg[0];
    myArgv[1] = arg[1];
    myArgv[2] = arg[2];

    echo_args.argc = 3;
    echo_args.argv = myArgv;

    strcpy(arg[0], "testsuite");
    strcpy(arg[1], "input");
    strcpy(arg[2], outputName);

    /* Share the signal, it has the new port number in it. */
    echo_args.signal = server_args->signal;

    /* Ready to execute client - wait for server to be ready. */
    wait_tcp_ready(server_args);

    /* Do a client TLS connection. */
#ifdef HAVE_STACK_SIZE
    fputs("echoclient_test #1: ", stdout);
    StackSizeCheck(&echo_args, echoclient_test_wrapper);
#else
    echoclient_test(&echo_args);
#endif
    if (echo_args.return_code != 0)
        return echo_args.return_code;

#ifdef WOLFSSL_DTLS
    /* Ensure server is ready for UDP data. */
    wait_tcp_ready(server_args);
#endif

    /* Next client connection - send quit to shutdown server. */
    echo_args.argc = 2;
    strcpy(echo_args.argv[1], "quit");

    /* Do a client TLS connection. */
#ifdef HAVE_STACK_SIZE
    fputs("echoclient_test #2: ", stdout);
    StackSizeCheck(&echo_args, echoclient_test_wrapper);
#else
    echoclient_test(&echo_args);
#endif
    if (echo_args.return_code != 0)
        return echo_args.return_code;

    return 0;
}

/* Show cipher suites available. */
static void show_ciphers()
{
    char ciphers[WOLFSSL_CIPHER_LIST_MAX_SIZE];
    XMEMSET(ciphers, 0, sizeof(ciphers));
    wolfSSL_get_ciphers(ciphers, sizeof(ciphers)-1);
    printf("ciphers = %s\n", ciphers);
}

/* Cleanup temporary output file. */
static void cleanup_output()
{
    remove(outputName);
}

/* Validate output equals input using a hash. Remove temporary output file.
 *
 * @return  0 on success.
 * @return  1 on failure.
 */
static int validate_cleanup_output()
{
#ifndef NO_SHA256
    byte input[WC_SHA256_DIGEST_SIZE];
    byte output[WC_SHA256_DIGEST_SIZE];

    file_test("input",  input);
    file_test(outputName, output);
#endif
    cleanup_output();
#ifndef NO_SHA256
    if (memcmp(input, output, sizeof(input)) != 0)
        return 1;
#endif
    return 0;
}

/* Simple server.
 *
 * @param [in] args  Object for server data in thread.
 * @return  Return code.
 */
#ifdef HAVE_STACK_SIZE
static THREAD_RETURN simple_test(func_args* args)
#else
static void simple_test(func_args* args)
#endif
{
    THREAD_TYPE serverThread;

    int i;

    func_args svrArgs;
    char *svrArgv[9];
    char argvs[9][32];

    func_args cliArgs;
    char *cliArgv[NUMARGS];
    char argvc[3][32];

    for (i = 0; i < 9; i++)
        svrArgv[i] = argvs[i];
    for (i = 0; i < 3; i++)
        cliArgv[i] = argvc[i];

    strcpy(argvs[0], "SimpleServer");
    svrArgs.argc = 1;
    svrArgs.argv = svrArgv;
    svrArgs.return_code = 0;
    #if !defined(USE_WINDOWS_API) && !defined(WOLFSSL_SNIFFER)  && \
                                     !defined(WOLFSSL_TIRTOS)
        strcpy(argvs[svrArgs.argc++], "-p");
        strcpy(argvs[svrArgs.argc++], "0");
    #endif
    /* Set the last arg later, when it is known. */

    args->return_code = 0;
    svrArgs.signal = args->signal;
    start_thread(server_test, &svrArgs, &serverThread);
    wait_tcp_ready(&svrArgs);

    /* Setting the actual port number. */
    strcpy(argvc[0], "SimpleClient");
    cliArgs.argv = cliArgv;
    cliArgs.return_code = 0;
#ifndef USE_WINDOWS_API
    cliArgs.argc = NUMARGS;
    strcpy(argvc[1], "-p");
    snprintf(argvc[2], sizeof(argvc[2]), "%d", (int)svrArgs.signal->port);
#else
    cliArgs.argc = 1;
#endif

    client_test(&cliArgs);
    if (cliArgs.return_code != 0) {
        args->return_code = cliArgs.return_code;
    #ifdef HAVE_STACK_SIZE
        return (THREAD_RETURN)0;
    #else
        return;
    #endif
    }
    join_thread(serverThread);
    if (svrArgs.return_code != 0) args->return_code = svrArgs.return_code;
#ifdef HAVE_STACK_SIZE
    return (THREAD_RETURN)0;
#endif
}
#endif /* !NO_WOLFSSL_SERVER && !NO_WOLFSSL_CLIENT */


/* Wait for the server to be ready for a connection.
 *
 * @param [in] args  Object to send to thread.
 */
void wait_tcp_ready(func_args* args)
{
#if defined(_POSIX_THREADS) && !defined(__MINGW32__)
    pthread_mutex_lock(&args->signal->mutex);

    if (!args->signal->ready)
        pthread_cond_wait(&args->signal->cond, &args->signal->mutex);
    args->signal->ready = 0; /* reset */

    pthread_mutex_unlock(&args->signal->mutex);
#elif defined(NETOS)
    (void)tx_mutex_get(&args->signal->mutex, TX_WAIT_FOREVER);

    /* TODO:
     * if (!args->signal->ready)
     *    pthread_cond_wait(&args->signal->cond, &args->signal->mutex);
     * args->signal->ready = 0; */

    (void)tx_mutex_put(&args->signal->mutex);

#else
    (void)args;
#endif
}


/* Start a thread.
 *
 * @param [in]  fun     Function to executre in thread.
 * @param [in]  args    Object to send to function in thread.
 * @param [out] thread  Handle to thread.
 */
void start_thread(THREAD_FUNC fun, func_args* args, THREAD_TYPE* thread)
{
#if defined(_POSIX_THREADS) && !defined(__MINGW32__)
    pthread_create(thread, 0, fun, args);
    return;
#elif defined(WOLFSSL_TIRTOS)
    /* Initialize the defaults and set the parameters. */
    Task_Params taskParams;
    Task_Params_init(&taskParams);
    taskParams.arg0 = (UArg)args;
    taskParams.stackSize = 65535;
    *thread = Task_create((Task_FuncPtr)fun, &taskParams, NULL);
    if (*thread == NULL) {
        printf("Failed to create new Task\n");
    }
    Task_yield();
#elif defined(NETOS)
    /* This can be adjusted by defining in user_settings.h, will default to 65k
     * in the event it is undefined */
    #ifndef TESTSUITE_THREAD_STACK_SZ
        #define TESTSUITE_THREAD_STACK_SZ 65535
    #endif
    int result;
    static void * TestSuiteThreadStack = NULL;

    /* Assume only one additional thread is created concurrently. */
    if (TestSuiteThreadStack == NULL)
    {
        TestSuiteThreadStack = (void *)malloc(TESTSUITE_THREAD_STACK_SZ);
        if (TestSuiteThreadStack == NULL)
        {
            printf ("Stack allocation failure.\n");
            return;
        }
    }

    memset (thread, 0, sizeof *thread);

    /* first create the idle thread:
     * ARGS:
     * Param1: pointer to thread
     * Param2: name
     * Param3 and 4: entry function and input
     * Param5: pointer to thread stack
     * Param6: stack size
     * Param7 and 8: priority level and preempt threshold
     * Param9 and 10: time slice and auto-start indicator */
    result = tx_thread_create(thread,
                       "WolfSSL TestSuiteThread",
                       (entry_functionType)fun, (ULONG)args,
                       TestSuiteThreadStack,
                       TESTSUITE_THREAD_STACK_SZ,
                       2, 2,
                       1, TX_AUTO_START);
    if (result != TX_SUCCESS)
    {
        printf("Ethernet Bypass Application: failed to create idle thread!\n");
    }

#else
    *thread = (THREAD_TYPE)_beginthreadex(0, 0, fun, args, 0, 0);
#endif
}


/* Join thread to wait for completion.
 *
 * @param [in] thread  Handle to thread.
 */
void join_thread(THREAD_TYPE thread)
{
#if defined(_POSIX_THREADS) && !defined(__MINGW32__)
    pthread_join(thread, 0);
#elif defined(WOLFSSL_TIRTOS)
    while(1) {
        if (Task_getMode(thread) == Task_Mode_TERMINATED) {
            Task_sleep(5);
            break;
        }
        Task_yield();
    }
#elif defined(NETOS)
    /* TODO: */
#else
    int res = WaitForSingleObject((HANDLE)thread, INFINITE);
    assert(res == WAIT_OBJECT_0);
    res = CloseHandle((HANDLE)thread);
    assert(res);
    (void)res; /* Suppress un-used variable warning */
#endif
}


#ifndef NO_SHA256
/* Create SHA-256 hash of the file based on filename.
 *
 * @param [in]  file   Name of file.
 * @parma [out] check  Buffer to hold SHA-256 hash.
 */
void file_test(const char* file, byte* check)
{
    FILE* f;
    int   i = 0, j, ret;
    wc_Sha256   sha256;
    byte  buf[1024];
    byte  shasum[WC_SHA256_DIGEST_SIZE];

    ret = wc_InitSha256(&sha256);
    if (ret != 0) {
        printf("Can't wc_InitSha256 %d\n", ret);
        return;
    }
    if( !( f = fopen( file, "rb" ) )) {
        printf("Can't open %s\n", file);
        return;
    }
    while( ( i = (int)fread(buf, 1, sizeof(buf), f )) > 0 ) {
        ret = wc_Sha256Update(&sha256, buf, i);
        if (ret != 0) {
            printf("Can't wc_Sha256Update %d\n", ret);
            fclose(f);
            return;
        }
    }

    ret = wc_Sha256Final(&sha256, shasum);
    wc_Sha256Free(&sha256);

    if (ret != 0) {
        printf("Can't wc_Sha256Final %d\n", ret);
        fclose(f);
        return;
    }

    XMEMCPY(check, shasum, sizeof(shasum));

    for(j = 0; j < WC_SHA256_DIGEST_SIZE; ++j )
        printf( "%02x", shasum[j] );

    printf("  %s\n", file);

    fclose(f);
}
#endif

#else /* SINGLE_THREADED */


int myoptind = 0;
char* myoptarg = NULL;


int main(int argc, char** argv)
{
    func_args wolfcrypt_test_args;

    wolfcrypt_test_args.argc = argc;
    wolfcrypt_test_args.argv = argv;

    wolfSSL_Init();
    ChangeToWolfRoot();

    /* No TLS - only doing cryptographic algorithm testing. */
    wolfcrypt_test(&wolfcrypt_test_args);
    if (wolfcrypt_test_args.return_code != 0)
        return wolfcrypt_test_args.return_code;

    wolfSSL_Cleanup();
    printf("\nAll tests passed!\n");

    EXIT_TEST(EXIT_SUCCESS);
}


#endif /* SINGLE_THREADED */