11 @item Server is configured using @url{http://yaml.org/, YAML} file. It
12 is very convenient to have comments and templates, comparing to JSON.
13 @item Incompatible with previous versions replacement of @emph{HSalsa20}
14 with @emph{BLAKE2b} in handshake code.
20 @item New optional @ref{Encless, encryptionless mode} of operation.
21 Technically no encryption functions are applied for outgoing packets, so
22 you can not be forced to reveal your encryption keys or sued for
24 @item @ref{MTU}s are configured on per-user basis.
25 @item Simplified payload padding scheme, saving one byte of data.
26 @item Ability to specify TAP interface name explicitly without any
27 up-scripts for convenience.
28 @item @code{govpn-verifier} utility also can use @ref{EGD}.
34 @item Fixed non-critical bug when server may fail if up-script is not
35 executed successfully.
41 @item @url{https://password-hashing.net/#argon2, Argon2d} is used instead
42 of PBKDF2 for password verifier hashing.
43 @item Client's identity is stored inside the verifier, so it simplifies
44 server-side configuration and the code.
50 @item Handshake messages can be noised: their messages lengths are
51 hidden. Now they are indistinguishable from transport messages.
52 @item Parallelized clients processing on the server side.
53 @item Much higher overall performance.
54 @item Single JSON file server configuration.
60 @item Ability to use @ref{Network, TCP} network transport.
61 Server can listen on both UDP and TCP sockets.
62 @item Ability to use @ref{Proxy, HTTP proxies} (through CONNECT method)
63 for accessing the server. Server can also emulate HTTP proxy behaviour.
64 @item Updated Poly1305 library with ARM-related bugfixes.
65 @item Go 1.5+ version is highly recommended because of performance
72 @item Ability to use external @ref{EGD}-compatible PRNGs. Now you are
73 able to use GoVPN even on systems with the bad @code{/dev/random},
74 providing higher quality entropy from external sources.
75 @item Removed @code{-noncediff} option. It is replaced with in-memory
76 storage of seen nonces, thus eliminating possible replay attacks at all
77 without performance degradation related to inbound packets reordering.
83 @item Compatibility with an old GNU Make 3.x. Previously only BSD Make
84 and GNU Make 4.x were supported.
85 @item /dev/urandom is used for correct client identity generation under
86 GNU/Linux systems. Previously /dev/random can produce less than required
88 @item Updated user manual examples.
95 Deterministic building: dependent libraries source code commits are
96 fixed in our makefiles.
98 No Internet connection is needed for building the source code: all
99 required libraries are included in release tarballs.
101 FreeBSD Make compatibility. GNU Make is not necessary anymore.
108 Diffie-Hellman public keys are encoded with Elligator algorithm when
109 sending over the wire, making them indistinguishable from the random
110 strings, preventing detection of successful decryption try when guessing
111 passwords (that are used to create DSA public keys). But this will
112 consume twice entropy for DH key generation in average.
119 EKE protocol is replaced by Augmented-EKE and static symmetric (both
120 sides have it) pre-shared key replaced with server-side verifier. This
121 requires, 64 more bytes in handshake traffic, Ed25519 dependency with
122 corresponding sign/verify computations, PBKDF2 dependency and its
123 usage on the client side during handshake.
125 A-EKE with PBKDF2-based verifiers is resistant to dictionary attacks,
126 can use human memorable passphrases instead of static keys and
127 server-side verifiers can not be used for authentication (compromised
128 server does not leak client's authentication keys/passphrases).
131 Changed transport message structure: added payload packet's length.
132 This will increase transport overhead for two bytes, but heartbeat
133 packets became smaller
136 Ability to hide underlying packets lengths by appending noise, junk
137 data during transmission. Each packet can be fill up-ed to its
141 Ability to hide underlying packets appearance rate, by generating
142 Constant Packet Rate traffic. This includes noise generation too.
144 Per-peer @code{-timeout}, @code{-noncediff}, @code{-noise} and
145 @code{-cpr} configuration options for server.
152 Added ability to optionally run built-in HTTP-server responding with
153 JSON of all known connected peers information. Real-time client's
157 Documentation is explicitly licenced under GNU FDL 1.3+.
164 Handshake packets became indistinguishable from the random.
165 Now all GoVPN's traffic is the noise for men in the middle.
168 Handshake messages are smaller (16% traffic reduce).
171 Adversary now can not create malicious fake handshake packets that
172 will force server to generate private DH key, preventing entropy
173 consuming and resource heavy computations.
179 @item Fixed several possible channel deadlocks.
185 @item Fixed Linux-related building.
191 @item Added clients identification.
192 @item Simultaneous several clients support by server.
193 @item Per-client up/down scripts.
199 @item Nonce obfuscation/encryption.
205 @item Performance optimizations.
211 @item Heartbeat feature.
212 @item Rehandshake feature.
213 @item up- and down- optinal scripts.
219 @item FreeBSD support.
225 @item Initial stable release.