/*
 * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include <stdio.h>
#include <string.h>
#include <openssl/e_os2.h>

#ifdef OPENSSL_NO_ENGINE
int main(int argc, char *argv[])
{
    printf("No ENGINE support\n");
    return (0);
}
#else
# include <openssl/buffer.h>
# include <openssl/crypto.h>
# include <openssl/engine.h>
# include <openssl/err.h>

static void display_engine_list(void)
{
    ENGINE *h;
    int loop;

    h = ENGINE_get_first();
    loop = 0;
    printf("listing available engine types\n");
    while (h) {
        printf("engine %i, id = \"%s\", name = \"%s\"\n",
               loop++, ENGINE_get_id(h), ENGINE_get_name(h));
        h = ENGINE_get_next(h);
    }
    printf("end of list\n");
    /*
     * ENGINE_get_first() increases the struct_ref counter, so we must call
     * ENGINE_free() to decrease it again
     */
    ENGINE_free(h);
}

int main(int argc, char *argv[])
{
    ENGINE *block[512];
    char buf[256];
    const char *id, *name, *p;
    ENGINE *ptr;
    int loop;
    int to_return = 1;
    ENGINE *new_h1 = NULL;
    ENGINE *new_h2 = NULL;
    ENGINE *new_h3 = NULL;
    ENGINE *new_h4 = NULL;

    p = getenv("OPENSSL_DEBUG_MEMORY");
    if (p != NULL && strcmp(p, "on") == 0)
        CRYPTO_set_mem_debug(1);

    memset(block, 0, sizeof(block));
    if (((new_h1 = ENGINE_new()) == NULL) ||
        !ENGINE_set_id(new_h1, "test_id0") ||
        !ENGINE_set_name(new_h1, "First test item") ||
        ((new_h2 = ENGINE_new()) == NULL) ||
        !ENGINE_set_id(new_h2, "test_id1") ||
        !ENGINE_set_name(new_h2, "Second test item") ||
        ((new_h3 = ENGINE_new()) == NULL) ||
        !ENGINE_set_id(new_h3, "test_id2") ||
        !ENGINE_set_name(new_h3, "Third test item") ||
        ((new_h4 = ENGINE_new()) == NULL) ||
        !ENGINE_set_id(new_h4, "test_id3") ||
        !ENGINE_set_name(new_h4, "Fourth test item")) {
        printf("Couldn't set up test ENGINE structures\n");
        goto end;
    }
    printf("\nenginetest beginning\n\n");
    display_engine_list();
    if (!ENGINE_add(new_h1)) {
        printf("Add failed!\n");
        goto end;
    }
    display_engine_list();
    ptr = ENGINE_get_first();
    if (!ENGINE_remove(ptr)) {
        printf("Remove failed!\n");
        goto end;
    }
    ENGINE_free(ptr);
    display_engine_list();
    if (!ENGINE_add(new_h3) || !ENGINE_add(new_h2)) {
        printf("Add failed!\n");
        goto end;
    }
    display_engine_list();
    if (!ENGINE_remove(new_h2)) {
        printf("Remove failed!\n");
        goto end;
    }
    display_engine_list();
    if (!ENGINE_add(new_h4)) {
        printf("Add failed!\n");
        goto end;
    }
    display_engine_list();
    if (ENGINE_add(new_h3)) {
        printf("Add *should* have failed but didn't!\n");
        goto end;
    } else
        printf("Add that should fail did.\n");
    ERR_clear_error();
    if (ENGINE_remove(new_h2)) {
        printf("Remove *should* have failed but didn't!\n");
        goto end;
    } else
        printf("Remove that should fail did.\n");
    ERR_clear_error();
    if (!ENGINE_remove(new_h3)) {
        printf("Remove failed!\n");
        goto end;
    }
    display_engine_list();
    if (!ENGINE_remove(new_h4)) {
        printf("Remove failed!\n");
        goto end;
    }
    display_engine_list();
    /*
     * Depending on whether there's any hardware support compiled in, this
     * remove may be destined to fail.
     */
    ptr = ENGINE_get_first();
    if (ptr)
        if (!ENGINE_remove(ptr))
            printf("Remove failed!i - probably no hardware "
                   "support present.\n");
    ENGINE_free(ptr);
    display_engine_list();
    if (!ENGINE_add(new_h1) || !ENGINE_remove(new_h1)) {
        printf("Couldn't add and remove to an empty list!\n");
        goto end;
    } else
        printf("Successfully added and removed to an empty list!\n");
    printf("About to beef up the engine-type list\n");
    for (loop = 0; loop < 512; loop++) {
        sprintf(buf, "id%i", loop);
        id = OPENSSL_strdup(buf);
        sprintf(buf, "Fake engine type %i", loop);
        name = OPENSSL_strdup(buf);
        if (((block[loop] = ENGINE_new()) == NULL) ||
            !ENGINE_set_id(block[loop], id) ||
            !ENGINE_set_name(block[loop], name)) {
            printf("Couldn't create block of ENGINE structures.\n"
                   "I'll probably also core-dump now, damn.\n");
            goto end;
        }
    }
    for (loop = 0; loop < 512; loop++) {
        if (!ENGINE_add(block[loop])) {
            printf("\nAdding stopped at %i, (%s,%s)\n",
                   loop, ENGINE_get_id(block[loop]),
                   ENGINE_get_name(block[loop]));
            goto cleanup_loop;
        } else
            printf(".");
        fflush(stdout);
    }
 cleanup_loop:
    printf("\nAbout to empty the engine-type list\n");
    while ((ptr = ENGINE_get_first()) != NULL) {
        if (!ENGINE_remove(ptr)) {
            printf("\nRemove failed!\n");
            goto end;
        }
        ENGINE_free(ptr);
        printf(".");
        fflush(stdout);
    }
    for (loop = 0; loop < 512; loop++) {
        OPENSSL_free((void *)ENGINE_get_id(block[loop]));
        OPENSSL_free((void *)ENGINE_get_name(block[loop]));
    }
    printf("\nTests completed happily\n");
    to_return = 0;
 end:
    if (to_return)
        ERR_print_errors_fp(stderr);
    ENGINE_free(new_h1);
    ENGINE_free(new_h2);
    ENGINE_free(new_h3);
    ENGINE_free(new_h4);
    for (loop = 0; loop < 512; loop++)
        ENGINE_free(block[loop]);

#ifndef OPENSSL_NO_CRYPTO_MDEBUG
    if (CRYPTO_mem_leaks_fp(stderr) <= 0)
        to_return = 1;
#endif
    return to_return;
}
#endif