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256 lines
11 KiB
C
256 lines
11 KiB
C
// SoftEther VPN Source Code - Stable Edition Repository
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// Cedar Communication Module
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//
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// SoftEther VPN Server, Client and Bridge are free software under the Apache License, Version 2.0.
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//
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// Copyright (c) Daiyuu Nobori.
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// Copyright (c) SoftEther VPN Project, University of Tsukuba, Japan.
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// Copyright (c) SoftEther Corporation.
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// Copyright (c) all contributors on SoftEther VPN project in GitHub.
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//
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// All Rights Reserved.
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//
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// http://www.softether.org/
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//
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// This stable branch is officially managed by Daiyuu Nobori, the owner of SoftEther VPN Project.
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// Pull requests should be sent to the Developer Edition Master Repository on https://github.com/SoftEtherVPN/SoftEtherVPN
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//
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// License: The Apache License, Version 2.0
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// DISCLAIMER
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// ==========
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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// THIS SOFTWARE IS DEVELOPED IN JAPAN, AND DISTRIBUTED FROM JAPAN, UNDER
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// JAPANESE LAWS. YOU MUST AGREE IN ADVANCE TO USE, COPY, MODIFY, MERGE, PUBLISH,
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// DISTRIBUTE, SUBLICENSE, AND/OR SELL COPIES OF THIS SOFTWARE, THAT ANY
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// JURIDICAL DISPUTES WHICH ARE CONCERNED TO THIS SOFTWARE OR ITS CONTENTS,
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// AGAINST US (SOFTETHER PROJECT, SOFTETHER CORPORATION, DAIYUU NOBORI OR OTHER
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// SUPPLIERS), OR ANY JURIDICAL DISPUTES AGAINST US WHICH ARE CAUSED BY ANY KIND
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// OF USING, COPYING, MODIFYING, MERGING, PUBLISHING, DISTRIBUTING, SUBLICENSING,
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// AND/OR SELLING COPIES OF THIS SOFTWARE SHALL BE REGARDED AS BE CONSTRUED AND
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// CONTROLLED BY JAPANESE LAWS, AND YOU MUST FURTHER CONSENT TO EXCLUSIVE
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// JURISDICTION AND VENUE IN THE COURTS SITTING IN TOKYO, JAPAN. YOU MUST WAIVE
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// ALL DEFENSES OF LACK OF PERSONAL JURISDICTION AND FORUM NON CONVENIENS.
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// PROCESS MAY BE SERVED ON EITHER PARTY IN THE MANNER AUTHORIZED BY APPLICABLE
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// LAW OR COURT RULE.
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//
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// USE ONLY IN JAPAN. DO NOT USE THIS SOFTWARE IN ANOTHER COUNTRY UNLESS YOU HAVE
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// A CONFIRMATION THAT THIS SOFTWARE DOES NOT VIOLATE ANY CRIMINAL LAWS OR CIVIL
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// RIGHTS IN THAT PARTICULAR COUNTRY. USING THIS SOFTWARE IN OTHER COUNTRIES IS
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// COMPLETELY AT YOUR OWN RISK. THE SOFTETHER VPN PROJECT HAS DEVELOPED AND
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// DISTRIBUTED THIS SOFTWARE TO COMPLY ONLY WITH THE JAPANESE LAWS AND EXISTING
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// CIVIL RIGHTS INCLUDING PATENTS WHICH ARE SUBJECTS APPLY IN JAPAN. OTHER
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// COUNTRIES' LAWS OR CIVIL RIGHTS ARE NONE OF OUR CONCERNS NOR RESPONSIBILITIES.
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// WE HAVE NEVER INVESTIGATED ANY CRIMINAL REGULATIONS, CIVIL LAWS OR
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// INTELLECTUAL PROPERTY RIGHTS INCLUDING PATENTS IN ANY OF OTHER 200+ COUNTRIES
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// AND TERRITORIES. BY NATURE, THERE ARE 200+ REGIONS IN THE WORLD, WITH
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// DIFFERENT LAWS. IT IS IMPOSSIBLE TO VERIFY EVERY COUNTRIES' LAWS, REGULATIONS
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// AND CIVIL RIGHTS TO MAKE THE SOFTWARE COMPLY WITH ALL COUNTRIES' LAWS BY THE
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// PROJECT. EVEN IF YOU WILL BE SUED BY A PRIVATE ENTITY OR BE DAMAGED BY A
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// PUBLIC SERVANT IN YOUR COUNTRY, THE DEVELOPERS OF THIS SOFTWARE WILL NEVER BE
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// LIABLE TO RECOVER OR COMPENSATE SUCH DAMAGES, CRIMINAL OR CIVIL
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// RESPONSIBILITIES. NOTE THAT THIS LINE IS NOT LICENSE RESTRICTION BUT JUST A
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// STATEMENT FOR WARNING AND DISCLAIMER.
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//
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// READ AND UNDERSTAND THE 'WARNING.TXT' FILE BEFORE USING THIS SOFTWARE.
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// SOME SOFTWARE PROGRAMS FROM THIRD PARTIES ARE INCLUDED ON THIS SOFTWARE WITH
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// LICENSE CONDITIONS WHICH ARE DESCRIBED ON THE 'THIRD_PARTY.TXT' FILE.
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//
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//
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// SOURCE CODE CONTRIBUTION
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// ------------------------
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//
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// Your contribution to SoftEther VPN Project is much appreciated.
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// Please send patches to us through GitHub.
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// Read the SoftEther VPN Patch Acceptance Policy in advance:
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// http://www.softether.org/5-download/src/9.patch
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//
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//
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// DEAR SECURITY EXPERTS
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// ---------------------
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//
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// If you find a bug or a security vulnerability please kindly inform us
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// about the problem immediately so that we can fix the security problem
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// to protect a lot of users around the world as soon as possible.
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//
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// Our e-mail address for security reports is:
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// softether-vpn-security [at] softether.org
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//
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// Please note that the above e-mail address is not a technical support
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// inquiry address. If you need technical assistance, please visit
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// http://www.softether.org/ and ask your question on the users forum.
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//
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// Thank you for your cooperation.
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//
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//
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// NO MEMORY OR RESOURCE LEAKS
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// ---------------------------
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//
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// The memory-leaks and resource-leaks verification under the stress
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// test has been passed before release this source code.
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// Interop_SSTP.h
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// Header of Interop_SSTP.c
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#ifndef INTEROP_SSTP_H
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#define INTEROP_SSTP_H
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//// Constants
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#define SSTP_URI "/sra_{BA195980-CD49-458b-9E23-C84EE0ADCD75}/" // SSTP HTTPS URI
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#define SSTP_VERSION_1 0x10 // SSTP Version 1.0
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#define MAX_SSTP_PACKET_SIZE 4096 // Maximum packet size
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#define SSTP_IPC_CLIENT_NAME "Microsoft SSTP VPN Client"
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#define SSTP_IPC_POSTFIX "SSTP"
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#define SSTP_ECHO_SEND_INTERVAL_MIN 2500 // Transmission interval of Echo Request (minimum)
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#define SSTP_ECHO_SEND_INTERVAL_MAX 4792 // Transmission interval of Echo Request (maximum)
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#define SSTP_TIMEOUT 10000 // Communication time-out of SSTP
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// SSTP Message Type
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#define SSTP_MSG_CALL_CONNECT_REQUEST 0x0001
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#define SSTP_MSG_CALL_CONNECT_ACK 0x0002
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#define SSTP_MSG_CALL_CONNECT_NAK 0x0003
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#define SSTP_MSG_CALL_CONNECTED 0x0004
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#define SSTP_MSG_CALL_ABORT 0x0005
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#define SSTP_MSG_CALL_DISCONNECT 0x0006
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#define SSTP_MSG_CALL_DISCONNECT_ACK 0x0007
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#define SSTP_MSG_ECHO_REQUEST 0x0008
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#define SSTP_MSG_ECHO_RESPONSE 0x0009
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// SSTP Attribute ID
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#define SSTP_ATTRIB_NO_ERROR 0x00
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#define SSTP_ATTRIB_ENCAPSULATED_PROTOCOL_ID 0x01
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#define SSTP_ATTRIB_STATUS_INFO 0x02
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#define SSTP_ATTRIB_CRYPTO_BINDING 0x03
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#define SSTP_ATTRIB_CRYPTO_BINDING_REQ 0x04
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// Protocol ID
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#define SSTP_ENCAPSULATED_PROTOCOL_PPP 0x0001
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// Hash Protocol Bitmask
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#define CERT_HASH_PROTOCOL_SHA1 0x01
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#define CERT_HASH_PROTOCOL_SHA256 0x02
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// Status
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#define ATTRIB_STATUS_NO_ERROR 0x00000000
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#define ATTRIB_STATUS_DUPLICATE_ATTRIBUTE 0x00000001
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#define ATTRIB_STATUS_UNRECOGNIZED_ATTRIBUTE 0x00000002
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#define ATTRIB_STATUS_INVALID_ATTRIB_VALUE_LENGTH 0x00000003
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#define ATTRIB_STATUS_VALUE_NOT_SUPPORTED 0x00000004
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#define ATTRIB_STATUS_UNACCEPTED_FRAME_RECEIVED 0x00000005
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#define ATTRIB_STATUS_RETRY_COUNT_EXCEEDED 0x00000006
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#define ATTRIB_STATUS_INVALID_FRAME_RECEIVED 0x00000007
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#define ATTRIB_STATUS_NEGOTIATION_TIMEOUT 0x00000008
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#define ATTRIB_STATUS_ATTRIB_NOT_SUPPORTED_IN_MSG 0x00000009
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#define ATTRIB_STATUS_REQUIRED_ATTRIBUTE_MISSING 0x0000000A
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#define ATTRIB_STATUS_STATUS_INFO_NOT_SUPPORTED_IN_MSG 0x0000000B
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// State of SSTP Server
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#define SSTP_SERVER_STATUS_REQUEST_PENGING 0 // Connection incomplete
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#define SSTP_SERVER_STATUS_CONNECTED_PENDING 1 // Connection completed. Authentication incomplete
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#define SSTP_SERVER_STATUS_ESTABLISHED 2 // Connection completed. Communication available
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// Length of Nonce
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#define SSTP_NONCE_SIZE 32 // 256 bits
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//// Type
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// SSTP Attibute
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struct SSTP_ATTRIBUTE
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{
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UCHAR AttributeId;
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UCHAR *Data;
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UINT DataSize;
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UINT TotalLength;
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};
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// SSTP Packet
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struct SSTP_PACKET
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{
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UCHAR Version;
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bool IsControl;
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UCHAR *Data;
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UINT DataSize;
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USHORT MessageType;
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LIST *AttibuteList;
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};
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// SSTP Server
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struct SSTP_SERVER
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{
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CEDAR *Cedar;
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UINT64 Now;
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IP ClientIp, ServerIp;
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UINT ClientPort, ServerPort;
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char ClientHostName[MAX_HOST_NAME_LEN + 1];
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char ClientCipherName[MAX_SIZE];
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SOCK_EVENT *SockEvent;
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QUEUE *RecvQueue; // Receive queue
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QUEUE *SendQueue; // Transmission queue
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INTERRUPT_MANAGER *Interrupt; // Interrupt manager
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bool Aborting; // Forced disconnection flag
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bool AbortSent; // Flag of whether to send the Abort
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bool AbortReceived; // Flag of whether the Abort has been received
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bool Disconnecting; // Disconnecting flag
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bool DisconnectSent; // Flag of whether to send a Disconnect
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bool DisconnectRecved; // Flag of whether a Disconnect has been received
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bool Disconnected; // Flag as to disconnect
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UINT Status; // State
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UCHAR SentNonce[SSTP_NONCE_SIZE]; // Random data sent
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TUBE *TubeRecv, *TubeSend; // Delivery tube of packets to PPP module
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THREAD *PPPThread; // PPP module thread
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UINT64 NextSendEchoRequestTick; // Time to send the next Echo Request
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UINT64 LastRecvTick; // Tick when some data has received at the end
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bool FlushRecvTube; // Flag whether to flush the reception tube
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UINT EstablishedCount; // Number of session establishment
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};
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//// Function prototype
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bool AcceptSstp(CONNECTION *c);
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bool ProcessSstpHttps(CEDAR *cedar, SOCK *s, SOCK_EVENT *se);
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SSTP_SERVER *NewSstpServer(CEDAR *cedar, IP *client_ip, UINT client_port, IP *server_ip,
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UINT server_port, SOCK_EVENT *se,
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char *client_host_name, char *crypt_name);
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void FreeSstpServer(SSTP_SERVER *s);
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void SstpProcessInterrupt(SSTP_SERVER *s);
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SSTP_PACKET *SstpParsePacket(UCHAR *data, UINT size);
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LIST *SstpParseAttributeList(UCHAR *data, UINT size, SSTP_PACKET *p);
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SSTP_ATTRIBUTE *SstpParseAttribute(UCHAR *data, UINT size);
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void SstpFreeAttribute(SSTP_ATTRIBUTE *a);
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void SstpFreeAttributeList(LIST *o);
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void SstpFreePacket(SSTP_PACKET *p);
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BUF *SstpBuildPacket(SSTP_PACKET *p);
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BUF *SstpBuildAttributeList(LIST *o, USHORT message_type);
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BUF *SstpBuildAttribute(SSTP_ATTRIBUTE *a);
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void SstpAbort(SSTP_SERVER *s);
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void SstpDisconnect(SSTP_SERVER *s);
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void SstpProcessPacket(SSTP_SERVER *s, SSTP_PACKET *p);
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void SstpProcessControlPacket(SSTP_SERVER *s, SSTP_PACKET *p);
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void SstpProcessDataPacket(SSTP_SERVER *s, SSTP_PACKET *p);
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SSTP_ATTRIBUTE *SstpFindAttribute(SSTP_PACKET *p, UCHAR attribute_id);
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SSTP_ATTRIBUTE *SstpNewAttribute(UCHAR attribute_id, UCHAR *data, UINT data_size);
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SSTP_ATTRIBUTE *SstpNewStatusInfoAttribute(UCHAR attrib_id, UINT status);
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SSTP_ATTRIBUTE *SstpNewCryptoBindingRequestAttribute(UCHAR hash_protocol_bitmask, UCHAR *nonce_32bytes);
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SSTP_PACKET *SstpNewDataPacket(UCHAR *data, UINT size);
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SSTP_PACKET *SstpNewControlPacket(USHORT message_type);
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SSTP_PACKET *SstpNewControlPacketWithAnAttribute(USHORT message_type, SSTP_ATTRIBUTE *a);
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void SstpSendPacket(SSTP_SERVER *s, SSTP_PACKET *p);
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bool GetNoSstp();
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void SetNoSstp(bool b);
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#endif // INTEROP_SSTP_H
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