Delete src/modules/helloacl.c
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/* ACL API example - An example for performing custom synchronous and
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* asynchronous password authentication.
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*
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* -----------------------------------------------------------------------------
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*
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* Copyright 2019 Amazon.com, Inc. or its affiliates.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Redis nor the names of its contributors may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#define REDISMODULE_EXPERIMENTAL_API
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#include "../redismodule.h"
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#include <pthread.h>
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#include <unistd.h>
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// A simple global user
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static RedisModuleUser *global;
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static uint64_t global_auth_client_id = 0;
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/* HELLOACL.REVOKE
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* Synchronously revoke access from a user. */
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int RevokeCommand_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
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REDISMODULE_NOT_USED(argv);
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REDISMODULE_NOT_USED(argc);
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if (global_auth_client_id) {
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RedisModule_DeauthenticateAndCloseClient(ctx, global_auth_client_id);
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return RedisModule_ReplyWithSimpleString(ctx, "OK");
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} else {
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return RedisModule_ReplyWithError(ctx, "Global user currently not used");
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}
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}
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/* HELLOACL.RESET
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* Synchronously delete and re-create a module user. */
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int ResetCommand_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
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REDISMODULE_NOT_USED(argv);
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REDISMODULE_NOT_USED(argc);
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RedisModule_FreeModuleUser(global);
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global = RedisModule_CreateModuleUser("global");
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RedisModule_SetModuleUserACL(global, "allcommands");
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RedisModule_SetModuleUserACL(global, "allkeys");
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RedisModule_SetModuleUserACL(global, "on");
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return RedisModule_ReplyWithSimpleString(ctx, "OK");
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}
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/* Callback handler for user changes, use this to notify a module of
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* changes to users authenticated by the module */
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void HelloACL_UserChanged(uint64_t client_id, void *privdata) {
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REDISMODULE_NOT_USED(privdata);
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REDISMODULE_NOT_USED(client_id);
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global_auth_client_id = 0;
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}
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/* HELLOACL.AUTHGLOBAL
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* Synchronously assigns a module user to the current context. */
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int AuthGlobalCommand_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
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REDISMODULE_NOT_USED(argv);
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REDISMODULE_NOT_USED(argc);
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if (global_auth_client_id) {
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return RedisModule_ReplyWithError(ctx, "Global user currently used");
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}
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RedisModule_AuthenticateClientWithUser(ctx, global, HelloACL_UserChanged, NULL, &global_auth_client_id);
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return RedisModule_ReplyWithSimpleString(ctx, "OK");
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}
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#define TIMEOUT_TIME 1000
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/* Reply callback for auth command HELLOACL.AUTHASYNC */
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int HelloACL_Reply(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
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REDISMODULE_NOT_USED(argv);
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REDISMODULE_NOT_USED(argc);
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size_t length;
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RedisModuleString *user_string = RedisModule_GetBlockedClientPrivateData(ctx);
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const char *name = RedisModule_StringPtrLen(user_string, &length);
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if (RedisModule_AuthenticateClientWithACLUser(ctx, name, length, NULL, NULL, NULL) ==
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REDISMODULE_ERR) {
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return RedisModule_ReplyWithError(ctx, "Invalid Username or password");
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}
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return RedisModule_ReplyWithSimpleString(ctx, "OK");
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}
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/* Timeout callback for auth command HELLOACL.AUTHASYNC */
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int HelloACL_Timeout(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
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REDISMODULE_NOT_USED(argv);
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REDISMODULE_NOT_USED(argc);
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return RedisModule_ReplyWithSimpleString(ctx, "Request timedout");
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}
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/* Private data frees data for HELLOACL.AUTHASYNC command. */
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void HelloACL_FreeData(RedisModuleCtx *ctx, void *privdata) {
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REDISMODULE_NOT_USED(ctx);
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RedisModule_FreeString(NULL, privdata);
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}
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/* Background authentication can happen here. */
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void *HelloACL_ThreadMain(void *args) {
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void **targs = args;
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RedisModuleBlockedClient *bc = targs[0];
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RedisModuleString *user = targs[1];
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RedisModule_Free(targs);
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RedisModule_UnblockClient(bc,user);
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return NULL;
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}
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/* HELLOACL.AUTHASYNC
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* Asynchronously assigns an ACL user to the current context. */
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int AuthAsyncCommand_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
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if (argc != 2) return RedisModule_WrongArity(ctx);
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pthread_t tid;
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RedisModuleBlockedClient *bc = RedisModule_BlockClient(ctx, HelloACL_Reply, HelloACL_Timeout, HelloACL_FreeData, TIMEOUT_TIME);
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void **targs = RedisModule_Alloc(sizeof(void*)*2);
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targs[0] = bc;
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targs[1] = RedisModule_CreateStringFromString(NULL, argv[1]);
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if (pthread_create(&tid, NULL, HelloACL_ThreadMain, targs) != 0) {
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RedisModule_AbortBlock(bc);
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return RedisModule_ReplyWithError(ctx, "-ERR Can't start thread");
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}
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return REDISMODULE_OK;
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}
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/* This function must be present on each Redis module. It is used in order to
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* register the commands into the Redis server. */
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int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
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REDISMODULE_NOT_USED(argv);
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REDISMODULE_NOT_USED(argc);
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if (RedisModule_Init(ctx,"helloacl",1,REDISMODULE_APIVER_1)
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== REDISMODULE_ERR) return REDISMODULE_ERR;
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if (RedisModule_CreateCommand(ctx,"helloacl.reset",
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ResetCommand_RedisCommand,"",0,0,0) == REDISMODULE_ERR)
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return REDISMODULE_ERR;
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if (RedisModule_CreateCommand(ctx,"helloacl.revoke",
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RevokeCommand_RedisCommand,"",0,0,0) == REDISMODULE_ERR)
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return REDISMODULE_ERR;
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if (RedisModule_CreateCommand(ctx,"helloacl.authglobal",
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AuthGlobalCommand_RedisCommand,"no-auth",0,0,0) == REDISMODULE_ERR)
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return REDISMODULE_ERR;
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if (RedisModule_CreateCommand(ctx,"helloacl.authasync",
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AuthAsyncCommand_RedisCommand,"no-auth",0,0,0) == REDISMODULE_ERR)
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return REDISMODULE_ERR;
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global = RedisModule_CreateModuleUser("global");
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RedisModule_SetModuleUserACL(global, "allcommands");
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RedisModule_SetModuleUserACL(global, "allkeys");
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RedisModule_SetModuleUserACL(global, "on");
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global_auth_client_id = 0;
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return REDISMODULE_OK;
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}
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