| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 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 |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| #include "config.h" |
| |
| #include "guacamole/error.h" |
| #include "id.h" |
| |
| #if defined(HAVE_LIBUUID) |
| #include <uuid/uuid.h> |
| #elif defined(HAVE_OSSP_UUID_H) |
| #include <ossp/uuid.h> |
| #else |
| #include <uuid.h> |
| #endif |
| |
| #include <stdlib.h> |
| |
| /** |
| * The length of a UUID in bytes. All UUIDs are guaranteed to be 36 1-byte |
| * characters long. |
| */ |
| #define GUAC_UUID_LEN 36 |
| |
| char* guac_generate_id(char prefix) { |
| |
| char* buffer; |
| char* identifier; |
| |
| /* Prepare object to receive generated UUID */ |
| #ifdef HAVE_LIBUUID |
| uuid_t uuid; |
| #else |
| uuid_t* uuid; |
| if (uuid_create(&uuid) != UUID_RC_OK) { |
| guac_error = GUAC_STATUS_NO_MEMORY; |
| guac_error_message = "Could not allocate memory for UUID"; |
| return NULL; |
| } |
| #endif |
| |
| /* Generate unique identifier */ |
| #ifdef HAVE_LIBUUID |
| uuid_generate(uuid); |
| #else |
| if (uuid_make(uuid, UUID_MAKE_V4) != UUID_RC_OK) { |
| uuid_destroy(uuid); |
| guac_error = GUAC_STATUS_NO_MEMORY; |
| guac_error_message = "UUID generation failed"; |
| return NULL; |
| } |
| #endif |
| |
| /* Allocate buffer for future formatted ID */ |
| buffer = malloc(GUAC_UUID_LEN + 2); |
| if (buffer == NULL) { |
| #ifndef HAVE_LIBUUID |
| uuid_destroy(uuid); |
| #endif |
| guac_error = GUAC_STATUS_NO_MEMORY; |
| guac_error_message = "Could not allocate memory for unique ID"; |
| return NULL; |
| } |
| |
| identifier = &(buffer[1]); |
| |
| /* Convert UUID to string to produce unique identifier */ |
| #ifdef HAVE_LIBUUID |
| uuid_unparse_lower(uuid, identifier); |
| #else |
| size_t identifier_length = GUAC_UUID_LEN + 1; |
| if (uuid_export(uuid, UUID_FMT_STR, &identifier, &identifier_length) != UUID_RC_OK) { |
| free(buffer); |
| uuid_destroy(uuid); |
| guac_error = GUAC_STATUS_INTERNAL_ERROR; |
| guac_error_message = "Conversion of UUID to unique ID failed"; |
| return NULL; |
| } |
| |
| /* Clean up generated UUID */ |
| uuid_destroy(uuid); |
| #endif |
| |
| buffer[0] = prefix; |
| buffer[GUAC_UUID_LEN + 1] = '\0'; |
| return buffer; |
| |
| } |
| |
| |