| /* |
| * 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 "client.h" |
| #include "common/clipboard.h" |
| #include "rdp.h" |
| #include "rdp_fs.h" |
| #include "rdp_svc.h" |
| #include "rdp_stream.h" |
| |
| #include <freerdp/freerdp.h> |
| #include <freerdp/channels/channels.h> |
| #include <guacamole/client.h> |
| #include <guacamole/protocol.h> |
| #include <guacamole/socket.h> |
| #include <guacamole/stream.h> |
| #include <guacamole/string.h> |
| |
| #ifdef HAVE_FREERDP_CLIENT_CLIPRDR_H |
| #include <freerdp/client/cliprdr.h> |
| #else |
| #include "compat/client-cliprdr.h" |
| #endif |
| |
| #ifdef ENABLE_WINPR |
| #include <winpr/stream.h> |
| #include <winpr/wtypes.h> |
| #else |
| #include "compat/winpr-stream.h" |
| #include "compat/winpr-wtypes.h" |
| #endif |
| |
| #include <stdlib.h> |
| |
| /** |
| * Writes the given filename to the given upload path, sanitizing the filename |
| * and translating the filename to the root directory. |
| */ |
| static void __generate_upload_path(const char* filename, char* path) { |
| |
| int i; |
| |
| /* Add initial backslash */ |
| *(path++) = '\\'; |
| |
| for (i=1; i<GUAC_RDP_FS_MAX_PATH; i++) { |
| |
| /* Get current, stop at end */ |
| char c = *(filename++); |
| if (c == '\0') |
| break; |
| |
| /* Replace special characters with underscores */ |
| if (c == '/' || c == '\\') |
| c = '_'; |
| |
| *(path++) = c; |
| |
| } |
| |
| /* Terminate path */ |
| *path = '\0'; |
| |
| } |
| |
| int guac_rdp_upload_file_handler(guac_user* user, guac_stream* stream, |
| char* mimetype, char* filename) { |
| |
| guac_client* client = user->client; |
| guac_rdp_client* rdp_client = (guac_rdp_client*) client->data; |
| |
| int file_id; |
| guac_rdp_stream* rdp_stream; |
| char file_path[GUAC_RDP_FS_MAX_PATH]; |
| |
| /* Get filesystem, return error if no filesystem */ |
| guac_rdp_fs* fs = rdp_client->filesystem; |
| if (fs == NULL) { |
| guac_protocol_send_ack(user->socket, stream, "FAIL (NO FS)", |
| GUAC_PROTOCOL_STATUS_SERVER_ERROR); |
| guac_socket_flush(user->socket); |
| return 0; |
| } |
| |
| /* Translate name */ |
| __generate_upload_path(filename, file_path); |
| |
| /* Open file */ |
| file_id = guac_rdp_fs_open(fs, file_path, ACCESS_GENERIC_WRITE, 0, |
| DISP_FILE_OVERWRITE_IF, 0); |
| if (file_id < 0) { |
| guac_protocol_send_ack(user->socket, stream, "FAIL (CANNOT OPEN)", |
| GUAC_PROTOCOL_STATUS_CLIENT_FORBIDDEN); |
| guac_socket_flush(user->socket); |
| return 0; |
| } |
| |
| /* Init upload status */ |
| rdp_stream = malloc(sizeof(guac_rdp_stream)); |
| rdp_stream->type = GUAC_RDP_UPLOAD_STREAM; |
| rdp_stream->upload_status.offset = 0; |
| rdp_stream->upload_status.file_id = file_id; |
| stream->data = rdp_stream; |
| stream->blob_handler = guac_rdp_upload_blob_handler; |
| stream->end_handler = guac_rdp_upload_end_handler; |
| |
| guac_protocol_send_ack(user->socket, stream, "OK (STREAM BEGIN)", |
| GUAC_PROTOCOL_STATUS_SUCCESS); |
| guac_socket_flush(user->socket); |
| return 0; |
| |
| } |
| |
| int guac_rdp_svc_pipe_handler(guac_user* user, guac_stream* stream, |
| char* mimetype, char* name) { |
| |
| guac_rdp_stream* rdp_stream; |
| guac_rdp_svc* svc = guac_rdp_get_svc(user->client, name); |
| |
| /* Fail if no such SVC */ |
| if (svc == NULL) { |
| guac_user_log(user, GUAC_LOG_ERROR, |
| "Requested non-existent pipe: \"%s\".", |
| name); |
| guac_protocol_send_ack(user->socket, stream, "FAIL (NO SUCH PIPE)", |
| GUAC_PROTOCOL_STATUS_CLIENT_BAD_REQUEST); |
| guac_socket_flush(user->socket); |
| return 0; |
| } |
| else |
| guac_user_log(user, GUAC_LOG_ERROR, |
| "Inbound half of channel \"%s\" connected.", |
| name); |
| |
| /* Init stream data */ |
| stream->data = rdp_stream = malloc(sizeof(guac_rdp_stream)); |
| stream->blob_handler = guac_rdp_svc_blob_handler; |
| rdp_stream->type = GUAC_RDP_INBOUND_SVC_STREAM; |
| rdp_stream->svc = svc; |
| |
| return 0; |
| |
| } |
| |
| int guac_rdp_clipboard_handler(guac_user* user, guac_stream* stream, |
| char* mimetype) { |
| |
| guac_client* client = user->client; |
| guac_rdp_client* rdp_client = (guac_rdp_client*) client->data; |
| guac_rdp_stream* rdp_stream; |
| |
| /* Init stream data */ |
| stream->data = rdp_stream = malloc(sizeof(guac_rdp_stream)); |
| stream->blob_handler = guac_rdp_clipboard_blob_handler; |
| stream->end_handler = guac_rdp_clipboard_end_handler; |
| rdp_stream->type = GUAC_RDP_INBOUND_CLIPBOARD_STREAM; |
| |
| guac_common_clipboard_reset(rdp_client->clipboard, mimetype); |
| return 0; |
| |
| } |
| |
| int guac_rdp_upload_blob_handler(guac_user* user, guac_stream* stream, |
| void* data, int length) { |
| |
| int bytes_written; |
| guac_rdp_stream* rdp_stream = (guac_rdp_stream*) stream->data; |
| |
| /* Get filesystem, return error if no filesystem 0*/ |
| guac_client* client = user->client; |
| guac_rdp_client* rdp_client = (guac_rdp_client*) client->data; |
| guac_rdp_fs* fs = rdp_client->filesystem; |
| if (fs == NULL) { |
| guac_protocol_send_ack(user->socket, stream, "FAIL (NO FS)", |
| GUAC_PROTOCOL_STATUS_SERVER_ERROR); |
| guac_socket_flush(user->socket); |
| return 0; |
| } |
| |
| /* Write entire block */ |
| while (length > 0) { |
| |
| /* Attempt write */ |
| bytes_written = guac_rdp_fs_write(fs, |
| rdp_stream->upload_status.file_id, |
| rdp_stream->upload_status.offset, |
| data, length); |
| |
| /* On error, abort */ |
| if (bytes_written < 0) { |
| guac_protocol_send_ack(user->socket, stream, |
| "FAIL (BAD WRITE)", |
| GUAC_PROTOCOL_STATUS_CLIENT_FORBIDDEN); |
| guac_socket_flush(user->socket); |
| return 0; |
| } |
| |
| /* Update counters */ |
| rdp_stream->upload_status.offset += bytes_written; |
| data += bytes_written; |
| length -= bytes_written; |
| |
| } |
| |
| guac_protocol_send_ack(user->socket, stream, "OK (DATA RECEIVED)", |
| GUAC_PROTOCOL_STATUS_SUCCESS); |
| guac_socket_flush(user->socket); |
| return 0; |
| |
| } |
| |
| int guac_rdp_svc_blob_handler(guac_user* user, guac_stream* stream, |
| void* data, int length) { |
| |
| guac_rdp_stream* rdp_stream = (guac_rdp_stream*) stream->data; |
| |
| /* Write blob data to SVC directly */ |
| guac_rdp_svc_write(rdp_stream->svc, data, length); |
| |
| guac_protocol_send_ack(user->socket, stream, "OK (DATA RECEIVED)", |
| GUAC_PROTOCOL_STATUS_SUCCESS); |
| guac_socket_flush(user->socket); |
| return 0; |
| |
| } |
| |
| int guac_rdp_clipboard_blob_handler(guac_user* user, guac_stream* stream, |
| void* data, int length) { |
| |
| guac_client* client = user->client; |
| guac_rdp_client* rdp_client = (guac_rdp_client*) client->data; |
| guac_common_clipboard_append(rdp_client->clipboard, (char*) data, length); |
| |
| return 0; |
| } |
| |
| int guac_rdp_upload_end_handler(guac_user* user, guac_stream* stream) { |
| |
| guac_client* client = user->client; |
| guac_rdp_client* rdp_client = (guac_rdp_client*) client->data; |
| guac_rdp_stream* rdp_stream = (guac_rdp_stream*) stream->data; |
| |
| /* Get filesystem, return error if no filesystem */ |
| guac_rdp_fs* fs = rdp_client->filesystem; |
| if (fs == NULL) { |
| guac_protocol_send_ack(user->socket, stream, "FAIL (NO FS)", |
| GUAC_PROTOCOL_STATUS_SERVER_ERROR); |
| guac_socket_flush(user->socket); |
| return 0; |
| } |
| |
| /* Close file */ |
| guac_rdp_fs_close(fs, rdp_stream->upload_status.file_id); |
| |
| /* Acknowledge stream end */ |
| guac_protocol_send_ack(user->socket, stream, "OK (STREAM END)", |
| GUAC_PROTOCOL_STATUS_SUCCESS); |
| guac_socket_flush(user->socket); |
| |
| free(rdp_stream); |
| return 0; |
| |
| } |
| |
| int guac_rdp_clipboard_end_handler(guac_user* user, guac_stream* stream) { |
| |
| guac_client* client = user->client; |
| guac_rdp_client* rdp_client = (guac_rdp_client*) client->data; |
| |
| /* Terminate clipboard data with NULL */ |
| guac_common_clipboard_append(rdp_client->clipboard, "", 1); |
| |
| /* Notify RDP server of new data, if connected */ |
| freerdp* rdp_inst = rdp_client->rdp_inst; |
| if (rdp_inst != NULL) { |
| |
| rdpChannels* channels = rdp_inst->context->channels; |
| |
| RDP_CB_FORMAT_LIST_EVENT* format_list = |
| (RDP_CB_FORMAT_LIST_EVENT*) freerdp_event_new( |
| CliprdrChannel_Class, |
| CliprdrChannel_FormatList, |
| NULL, NULL); |
| |
| /* Notify server that text data is now available */ |
| format_list->formats = (UINT32*) malloc(sizeof(UINT32) * 2); |
| format_list->formats[0] = CB_FORMAT_TEXT; |
| format_list->formats[1] = CB_FORMAT_UNICODETEXT; |
| format_list->num_formats = 2; |
| |
| freerdp_channels_send_event(channels, (wMessage*) format_list); |
| |
| } |
| |
| return 0; |
| } |
| |
| int guac_rdp_download_ack_handler(guac_user* user, guac_stream* stream, |
| char* message, guac_protocol_status status) { |
| |
| guac_client* client = user->client; |
| guac_rdp_client* rdp_client = (guac_rdp_client*) client->data; |
| guac_rdp_stream* rdp_stream = (guac_rdp_stream*) stream->data; |
| |
| /* Get filesystem, return error if no filesystem */ |
| guac_rdp_fs* fs = rdp_client->filesystem; |
| if (fs == NULL) { |
| guac_protocol_send_ack(user->socket, stream, "FAIL (NO FS)", |
| GUAC_PROTOCOL_STATUS_SERVER_ERROR); |
| guac_socket_flush(user->socket); |
| return 0; |
| } |
| |
| /* If successful, read data */ |
| if (status == GUAC_PROTOCOL_STATUS_SUCCESS) { |
| |
| /* Attempt read into buffer */ |
| char buffer[4096]; |
| int bytes_read = guac_rdp_fs_read(fs, |
| rdp_stream->download_status.file_id, |
| rdp_stream->download_status.offset, buffer, sizeof(buffer)); |
| |
| /* If bytes read, send as blob */ |
| if (bytes_read > 0) { |
| rdp_stream->download_status.offset += bytes_read; |
| guac_protocol_send_blob(user->socket, stream, |
| buffer, bytes_read); |
| } |
| |
| /* If EOF, send end */ |
| else if (bytes_read == 0) { |
| guac_protocol_send_end(user->socket, stream); |
| guac_user_free_stream(user, stream); |
| free(rdp_stream); |
| } |
| |
| /* Otherwise, fail stream */ |
| else { |
| guac_user_log(user, GUAC_LOG_ERROR, |
| "Error reading file for download"); |
| guac_protocol_send_end(user->socket, stream); |
| guac_user_free_stream(user, stream); |
| free(rdp_stream); |
| } |
| |
| guac_socket_flush(user->socket); |
| |
| } |
| |
| /* Otherwise, return stream to user */ |
| else |
| guac_user_free_stream(user, stream); |
| |
| return 0; |
| |
| } |
| |
| int guac_rdp_ls_ack_handler(guac_user* user, guac_stream* stream, |
| char* message, guac_protocol_status status) { |
| |
| int blob_written = 0; |
| const char* filename; |
| |
| guac_rdp_stream* rdp_stream = (guac_rdp_stream*) stream->data; |
| |
| /* If unsuccessful, free stream and abort */ |
| if (status != GUAC_PROTOCOL_STATUS_SUCCESS) { |
| guac_rdp_fs_close(rdp_stream->ls_status.fs, |
| rdp_stream->ls_status.file_id); |
| guac_user_free_stream(user, stream); |
| free(rdp_stream); |
| return 0; |
| } |
| |
| /* While directory entries remain */ |
| while ((filename = guac_rdp_fs_read_dir(rdp_stream->ls_status.fs, |
| rdp_stream->ls_status.file_id)) != NULL |
| && !blob_written) { |
| |
| char absolute_path[GUAC_RDP_FS_MAX_PATH]; |
| |
| /* Skip current and parent directory entries */ |
| if (strcmp(filename, ".") == 0 || strcmp(filename, "..") == 0) |
| continue; |
| |
| /* Concatenate into absolute path - skip if invalid */ |
| if (!guac_rdp_fs_append_filename(absolute_path, |
| rdp_stream->ls_status.directory_name, filename)) { |
| |
| guac_user_log(user, GUAC_LOG_DEBUG, |
| "Skipping filename \"%s\" - filename is invalid or " |
| "resulting path is too long", filename); |
| |
| continue; |
| } |
| |
| /* Attempt to open file to determine type */ |
| int file_id = guac_rdp_fs_open(rdp_stream->ls_status.fs, absolute_path, |
| ACCESS_GENERIC_READ, 0, DISP_FILE_OPEN, 0); |
| if (file_id < 0) |
| continue; |
| |
| /* Get opened file */ |
| guac_rdp_fs_file* file = guac_rdp_fs_get_file(rdp_stream->ls_status.fs, |
| file_id); |
| if (file == NULL) { |
| guac_client_log(rdp_stream->ls_status.fs->client, GUAC_LOG_DEBUG, |
| "%s: Successful open produced bad file_id: %i", |
| __func__, file_id); |
| return 0; |
| } |
| |
| /* Determine mimetype */ |
| const char* mimetype; |
| if (file->attributes & FILE_ATTRIBUTE_DIRECTORY) |
| mimetype = GUAC_USER_STREAM_INDEX_MIMETYPE; |
| else |
| mimetype = "application/octet-stream"; |
| |
| /* Write entry */ |
| blob_written |= guac_common_json_write_property(user, stream, |
| &rdp_stream->ls_status.json_state, absolute_path, mimetype); |
| |
| guac_rdp_fs_close(rdp_stream->ls_status.fs, file_id); |
| |
| } |
| |
| /* Complete JSON and cleanup at end of directory */ |
| if (filename == NULL) { |
| |
| /* Complete JSON object */ |
| guac_common_json_end_object(user, stream, |
| &rdp_stream->ls_status.json_state); |
| guac_common_json_flush(user, stream, |
| &rdp_stream->ls_status.json_state); |
| |
| /* Clean up resources */ |
| guac_rdp_fs_close(rdp_stream->ls_status.fs, |
| rdp_stream->ls_status.file_id); |
| free(rdp_stream); |
| |
| /* Signal of stream */ |
| guac_protocol_send_end(user->socket, stream); |
| guac_user_free_stream(user, stream); |
| |
| } |
| |
| guac_socket_flush(user->socket); |
| return 0; |
| |
| } |
| |
| int guac_rdp_download_get_handler(guac_user* user, guac_object* object, |
| char* name) { |
| |
| guac_client* client = user->client; |
| guac_rdp_client* rdp_client = (guac_rdp_client*) client->data; |
| |
| /* Get filesystem, ignore request if no filesystem */ |
| guac_rdp_fs* fs = rdp_client->filesystem; |
| if (fs == NULL) |
| return 0; |
| |
| /* Attempt to open file for reading */ |
| int file_id = guac_rdp_fs_open(fs, name, ACCESS_GENERIC_READ, 0, |
| DISP_FILE_OPEN, 0); |
| if (file_id < 0) { |
| guac_user_log(user, GUAC_LOG_INFO, "Unable to read file \"%s\"", |
| name); |
| return 0; |
| } |
| |
| /* Get opened file */ |
| guac_rdp_fs_file* file = guac_rdp_fs_get_file(fs, file_id); |
| if (file == NULL) { |
| guac_client_log(fs->client, GUAC_LOG_DEBUG, |
| "%s: Successful open produced bad file_id: %i", |
| __func__, file_id); |
| return 0; |
| } |
| |
| /* If directory, send contents of directory */ |
| if (file->attributes & FILE_ATTRIBUTE_DIRECTORY) { |
| |
| /* Create stream data */ |
| guac_rdp_stream* rdp_stream = malloc(sizeof(guac_rdp_stream)); |
| rdp_stream->type = GUAC_RDP_LS_STREAM; |
| rdp_stream->ls_status.fs = fs; |
| rdp_stream->ls_status.file_id = file_id; |
| guac_strlcpy(rdp_stream->ls_status.directory_name, name, |
| sizeof(rdp_stream->ls_status.directory_name)); |
| |
| /* Allocate stream for body */ |
| guac_stream* stream = guac_user_alloc_stream(user); |
| stream->ack_handler = guac_rdp_ls_ack_handler; |
| stream->data = rdp_stream; |
| |
| /* Init JSON object state */ |
| guac_common_json_begin_object(user, stream, |
| &rdp_stream->ls_status.json_state); |
| |
| /* Associate new stream with get request */ |
| guac_protocol_send_body(user->socket, object, stream, |
| GUAC_USER_STREAM_INDEX_MIMETYPE, name); |
| |
| } |
| |
| /* Otherwise, send file contents */ |
| else { |
| |
| /* Create stream data */ |
| guac_rdp_stream* rdp_stream = malloc(sizeof(guac_rdp_stream)); |
| rdp_stream->type = GUAC_RDP_DOWNLOAD_STREAM; |
| rdp_stream->download_status.file_id = file_id; |
| rdp_stream->download_status.offset = 0; |
| |
| /* Allocate stream for body */ |
| guac_stream* stream = guac_user_alloc_stream(user); |
| stream->data = rdp_stream; |
| stream->ack_handler = guac_rdp_download_ack_handler; |
| |
| /* Associate new stream with get request */ |
| guac_protocol_send_body(user->socket, object, stream, |
| "application/octet-stream", name); |
| |
| } |
| |
| guac_socket_flush(user->socket); |
| return 0; |
| } |
| |
| int guac_rdp_upload_put_handler(guac_user* user, guac_object* object, |
| guac_stream* stream, char* mimetype, char* name) { |
| |
| guac_client* client = user->client; |
| guac_rdp_client* rdp_client = (guac_rdp_client*) client->data; |
| |
| /* Get filesystem, return error if no filesystem */ |
| guac_rdp_fs* fs = rdp_client->filesystem; |
| if (fs == NULL) { |
| guac_protocol_send_ack(user->socket, stream, "FAIL (NO FS)", |
| GUAC_PROTOCOL_STATUS_SERVER_ERROR); |
| guac_socket_flush(user->socket); |
| return 0; |
| } |
| |
| /* Open file */ |
| int file_id = guac_rdp_fs_open(fs, name, ACCESS_GENERIC_WRITE, 0, |
| DISP_FILE_OVERWRITE_IF, 0); |
| |
| /* Abort on failure */ |
| if (file_id < 0) { |
| guac_protocol_send_ack(user->socket, stream, "FAIL (CANNOT OPEN)", |
| GUAC_PROTOCOL_STATUS_CLIENT_FORBIDDEN); |
| guac_socket_flush(user->socket); |
| return 0; |
| } |
| |
| /* Init upload stream data */ |
| guac_rdp_stream* rdp_stream = malloc(sizeof(guac_rdp_stream)); |
| rdp_stream->type = GUAC_RDP_UPLOAD_STREAM; |
| rdp_stream->upload_status.offset = 0; |
| rdp_stream->upload_status.file_id = file_id; |
| |
| /* Allocate stream, init for file upload */ |
| stream->data = rdp_stream; |
| stream->blob_handler = guac_rdp_upload_blob_handler; |
| stream->end_handler = guac_rdp_upload_end_handler; |
| |
| /* Acknowledge stream creation */ |
| guac_protocol_send_ack(user->socket, stream, "OK (STREAM BEGIN)", |
| GUAC_PROTOCOL_STATUS_SUCCESS); |
| guac_socket_flush(user->socket); |
| return 0; |
| } |
| |