Chat prototype - v0.3 release

[epoberezkin]

• e2e encryption
• command authentication
• include authtag inside encrypted part and pad messages for e2e improve rsa encryption #61
• transport encryption transport encryption #65
• tcp connection management - heartbeat, detect disconnection SMP heartbeat to maintain the connection #59
• terminal editing
• save messages agent: save messages #45
• delivery notifications
• executables in releases automate releases #76 automate changelogs #84
• auto-subscribe to connected contacts chat: subscribe to all connections on startup #70
• SMP protocol - align with the implementation
• agent protocol - finalize
• basic terminal mode Windows terminal editing #71, enforced basic mode, no utf8 support warning enforce windows terminal mode to basic, warning message #77
• separate DB connection per agent client Separate db connection for each TCP client connection #60
• agent error handling and errors sent to the client improve error handling #101 return error on creation of duplicate connection #102
• initialize database via an absolute path, e.g. in home folder agent sqlite: initialize database in home directory by default #74
• deploy new server version
• key serialisation format (server key files, invitation, database) standard X509/PKCS8 encoding for RSA keys #98
• binary key in transport handshake binary X509 encoding for RSA key send during transport handshake #105
• fix non deterministic tests tests: block on tcp server creation #99
• mitigate timing attack on SMP command signature verification
• SMP server deployment - md file
• installation instructions / script

[spaced4ndy]

+ SMP server deployment?
+ fix non deterministic tests?
+ initialize database via an absolute path, e.g. in home folder

[epoberezkin]

improve PING/PONG to be independent and sent over irregular random intervals depending on other traffic by both client and server.

• PING - sent by client, no response expected
• PONG - sent by server, no correlation ID