-TODO
-====
-
-This is more or less complete list of tasks that has to be done before
-SILC 1.0 could ever be released. It is clear that the list does not
-include all the bugs that exists. At the end of list are tasks that
-needs to be done but are probably post 1.0.
-
-Feel free to contribute if you have the ability and free time - all the
-help is really appreciated - and needed.
-
- - Pekka
-
-
-New features TODO
-=================
-
- o Extended SIM (SILC Module) support. Currently only SILC Cipher API
- and SILC Hash API may be used as SIM's. What I have in mind is to
- have extended support for SIM's so that basically any SILC API could
- be used as SIM's. This would open tremendous possiblities but
- opens also issues on security that needs to be dealt with.
-
- Some sort of SIM compilation environment should be defined so that
- the SIM's could use SILC specific symbols from the modules (which they
- cannot do currently). In the future modules could add new features
- to SILC easily with this support. I'm more thinking this from client's
- perspective to add new features to client (such as IRC support as SIM)
- but server should have the support as well. Anyhow, this is an
- interesting feature...
-
- This maybe post 1.0 task - dunno.
-
- o SIM support for other platforms than just for Linux. Apache has
- example code (code that we could use directly pretty easily) for
- other platforms.
-
- o We should replace all short, int, long, unsigned short, unsigned int,
- unsigned long with some pre-defined datatypes that really are what
- we want on all platforms. int16, uint16, int32, uint32 etc. are
- what we could use or maybe SilcInt16, SilcUInt16 etc. Also, boolean
- datatype should be defined.
-
- o More platform supports should be added. The code is pretty much
- generic but there are some parts that require porting (SIM). Also,
- some support for different platforms is needed into configure.in.
-
- o SILC requires currently GCC to work because we use GCC specific
- compilation options. Generally any compiler that supports inline
- functions and can build shared libraries (for SIMs) should work.
- These cases should be included into configure.in.
-
-
-TODO In SILC Client
-===================
-
- o Implement all commands. A lot of commands are still yet to be
- implemented. Most of them are trivial but some will require some
- planning. Go see the command.c for unimplemented commands.
-
- o Non-blocking connection on the background must be stopped if some
- other connection on same window has established. Now it is possible
- that some non-blocking connection timeouts on the background when
- we already have a working connection to some other place; things
- goes bad.
-
- o Finish WHOIS, finish JOIN and other commands that are partly
- implemented.
+TODO/bugs In SILC Client Library
+================================
+
+ o Client library crashes if for example server timeouts protocol
+ execution and disconnects the client. The client, on the other hand
+ may still assume that the connection is active, even after receiving
+ the EOF. Reason for this is that the clien library does not handle
+ the SilcSocketConnection reference counter at all. This must be
+ fixed.
+
+ o When receiving client's public key with GETKEY or in key agreement
+ protoocl it probably should be saved using the nickname and the real
+ name of the client instead of the host name of the client.
+
+ o Add client library parameters or options that handle what kind of
+ messages the library should print out (using `say' client operation,
+ for example) and what is left for the application to print. The
+ appliation could for example set that it handles all command printing
+ but all error printing should be handled by the library, etc...
+ This is not a showstopper.
o Input line on UI is buggy. Cursor movement etc bugs. Too lazy to
fix it.
- o Logic for handling multiple same nicknames for example in private
- message sending. I guess the logic is done in server side but is
- missing from client.
-
- o Private message key setting is missing and must be implemented.
- Currently private messages are encrypted with session keys. This
- is required by the protocol.
-
- o Channel private key setting is missing and must be implemented.
- Currently there cannot be private keys for channels. Normal channel
- keys (generated by server) are used. This is required by the protocol.
- o Public and private key generation is now done everytime the program
- is run. Now, this is only for testing period as I've been lazy to
- do it any better for now. This must be fixed.
+TODO/bugs In SILC Server
+========================
- o I guess, public key authentication (when connecting to a server)
- is not working currently. It is just matter of loading the keys
- from file and using them (see corresponding code in server, it should
- support public key authentication already).
+ o Send SILC_NOTIFY_TYPE_CUMODE_CHANGE when received announced channels
+ and channel users and we (router) already has a channel founder on the
+ channel.
- o Multiple windows support. Basic support for multiple windows already
- exists but a lot is still missing to get it working. Also, some
- of the existing stuff probably needs to be tweaked a bit before the
- multiple windows support could be done. And of course the actual
- commands that control the windows needs to be written (/WINDDOW).
-
- o Implement /KEYMAP (or similiar) command to remap control and function
- keys.
-
- o Implement /ALIAS command to make command aliases.
-
- o Implement /set/if/do/while etc as in IRC2. Maybe post 1.0 task.
- Some scripting would be good.
-
- o Connection Authentication request resolving is missing and must be
- done. This is required by the protocol.
-
- o Key Exchange protocol's responder side is missing from client.
- Generally it is possible for the client to be responder so it should
- be implemented (See corresponding code from server). Error handling
- in the KE protocol is also in pretty bad shape in client.
-
- o Configuration file loading from global and from local dirs. This
- is currently missing and I guess the global is only used. Old SILC
- version (in 1997) had ~./silc directory that I guess should be done
- now as well. The code for handling those exists but not in current
- source tree.
-
- o Configuration file format - could be better.
-
- o Write help files for commands. Nice format for the help files should
- be selected. I'm open for ideas.
-
- o All allocations and freeing needs to be checked for memory leaks.
- Also, return values from various allocations and functions needs to
- checked.
-
-
-TODO In SILC Server
-===================
-
- o Implement all commands on server side. A lot of commands are still yet
- to be implemented. Most of them are trivial but some will require some
- planning. Go see the command.c for unimplemented commands.
+ o When server quits and all clients of that server are removed from all
+ channels the channel keys are re-generated for all clients. This is
+ a bug and should be done only once per channel after all clients of
+ the server has been removed.
o DNS/IP lookup blocks the server. This must be fixed. Check the
resolver stuff (resolver(3), resolver(5)). Either we have to do the
own resolver stuff (through scheduler, if possible without writing
too much own stuff) or use threads.
- o Lenght of the packet processing timeouts needs to be checked whether
- they are too short or too long. I haven't really tested whether they
- are suitable. They should be tested on high load which I haven't done
- at all yet.
+ o The ID List must be optimized. When the lists grow the searching
+ becomes a lot slower and is some cases the lists are searched many
+ times, like with channel messages (twice at least). Some sort of
+ hash tables should replace the lists. Thus, the ID cache should be
+ rewritten to use hash tables internally.
- o INVITE command must set the channel's invite list if channel is
- invite-only channel.
+ o [DenyConnection] config section is not implemented.
- o Public and private key generation is now done everytime the program
- is run. Now, this is only for testing period as I've been lazy to
- do it any better for now. This must be fixed.
+ o The backup router support described in the protocol specification
+ should be done at some point.
o Server says that it is able to listen on multiple ports but currently
that is bogus. It can, but internals are for single server.
- o Command lagging must implemented. Those commands (all currently) that
- has the LAG flag set they must not be allowed to be executed more than
- once, say, in 2 seconds.
-
- o Command flag usage in general is not implemented yet.
-
- o Client history must be implemented. Protocol says that server must
- keep history information about clients for some period of time.
-
- o Channel flags and user modes on channels are not implemented yet as
- /MODE command is not implemented yet in client and server.
-
o Protocol execution timeouts are hard coded, should be configurable.
- o Channel message sending routines uses a lot of common code. Should
- create a common function for those instead of writing the same code
- again everytime, as done now.
-
- o serverutil.c I guess should be created for util-like functions that
- now resides in server.c, which is getting too big.
-
- o serverconfig.c and the function naming in it is inconsistent. It is
- not silc_config_server* it should be silc_server_config*. As should
- all the SilcConfigServer* types be SilcServerConfig*.
-
- o Implement DENY_CONNECTION section in serverconfig.c and in server.
-
- o Implement REDIRECT_CLIENT section in serverconfig.c and in server.
-
- o Configuration file format - could be better.
-
o IP address fields in configuration file should accept mask format
as well, IP/MASK, and not just plain IP.
o Connection classes should be actually implemented in serverconfig.c.
- They can be defined but they are totally ignored currently.
-
- o Acceptance of incoming connections (client and server connections)
- should be checked before key exchange protocol. Currently it is
- checked at the authentication phase after KE, that is ok, but it should
- be checked before starting KE, as well.
-
- o Statistics are totally missing from the server. It would be nice
- to gather some statistics.
-
- o All allocations and freeing needs to be checked for memory leaks.
- Also, return values from various allocations and functions needs to
- checked.
-
-
-TODO In SILC Libraries
-======================
-
- o Public key verification in SKE (SILC Key Exchange) protocol is missing,
- thus currently we trust on all public keys. This probably doesn't cause
- bad problems but the mechanism of verifying it from local database
- (from files) needs to be done (it can open man-in-the-middle-attacks).
-
- o Implement PFS (Perfect Forward Secrecy) flag in SKE (and in client and
- server, actually). If PFS is set, re-key must cause new key exchange.
- This is required by the SILC protocol.
+ They can be defined but they are totally ignored currently. And they
+ should be redefined also.
- o Re-key in general is actually missing (from everywhere) and must be done.
- o SKE does not send correct status types. Types are defined but not
- sent.
+TODO/bugs In SILC Libraries
+===========================
- o Connection authentication protocol does not send correct status types.
- These types are not defined currently at all.
-
- o PKCS#1 style RSA public key encryption/decryption/sign/verify is
- missing, and should be added for interoperability reasons. The thing
- I've done now is bad and should be removed as soon as possible (or
- the protocol should then state the method of how they should be done).
-
- o SILC public key file type is bad. I'd like to see PEM encoded files.
- I have public domain code for base64 encoding but it needs to be
- rewritten.
-
- o Slow ciphers should be removed. I think we don't need more than
- the AES finalists plus blowfish and RC5.
-
- o These slow ciphers actually don't work currently as I've tested
- only the ones that are worth testing. The CBC mode on these slow
- ciphers probably don't work. No need to worry, these ciphers should
- be removed.
-
- o Scheduler needs to be analyzed on high load as it might be unfair
- towards select() because it may run timeout tasks before select() and
- after select(). If it is found to be unfair the timeout task running
- before select() should probably be removed.
-
- o On select() issue; maybe we should use poll() instead if it is
- available? poll() doesn't have max fd limit...
-
- o SIM support for SILC PKCS API needs to made so that they could be
- used as SIM's. At the same time some work is required on prime
- generation as the way it is done now sucks. Read from code for
- more (silcpkcs.h).
+ o Remove the static lists from SILC ciphers, PKCS and hash functions
+ in the crypto library. The currently acceptable code is used in the
+ HMAC library, look from there. The config file must decide the order
+ of the algorithms, not the static lists, as they are doing now.
+ Actually the way to do this is to keep the static lists, but register
+ the algorithms to the dynamic list and make the alloc routines to
+ check only the dynamic list. Also, replace the lists used by these
+ routines with SilcList. Also, for applications it might be nice
+ to export a function that registers default algorithms, if application
+ does not want to register them one by one (if for example SILC client
+ is run without config files at all).
o Compression routines are missing. The protocol supports packet
compression thus it must be implemented. SILC Comp API must be
not in distribution), but it is not used yet, and it requires some
tweaking on the Makefiles (we want static lib not shared).
- o Cipher API needs to be made more consistent. Some parts of the
- code generated with current Cipher API looks really bad. Same
- is with PKCS API, even worse actually. They need to be made
- cleaner. Introducing silc_cipher_encrypt/decrypt/set_key etc.
- functions (I actually don't understand why have I left these un-done).
-
- o Scheduler should automatically allocate task queues if NULL pointers
- are passed to the silc_schedule_init. Would make initialization
- cleaner.
-
- o Packet processing routines in client and server are actually pretty
- much generic and should be moved from the client/server to the library
- as generic routines (silc_<client/server>_packet_decrypt_rest* etc).
- This requires heavy changes to the client and server.
-
- o Random Number Generator needs some tweaking. Reading /dev/random may
- block resulting slow initialization of RNG. Some other things in the
- RNG may block as well. Also, I have some pending changes to the RNG
- that needs to be commited (from Schneier's Yarrow-160 paper). They
- should make the RNG even better.
-
- o Logging should be made more generic in a way that application can
- set to where the logging is destined to. Now, it is always destined
- to stdout (or stderr) which is a bad thing for client. Ie. some
- sort of logging registration functions or similiar should be done
- (silclog.[ch] in core). The actual output of logs should be done
- by callback function in the application not in lib.
-
- o I don't like the ID cache system currenly implemented. Ugly and
- not so good. Must be rewritten very soon.
-
- o All allocations and freeing needs to be checked for memory leaks.
-
- o There are also checks missing from allocations whether the allocation
- returns valid memory or NULL. These are missing in library as well
- in client and server. Either all checks has to be added or we will
- have to make sure that silc_*alloc()s always return valid memory
- and assert()s if the system's memory allocator (*alloc()) fails.
+ o Some of the ciphers in lib/silccrypt does not implement the SILC
+ Crypto API correctly.
- o silc_buffer_[un]format() needs to be made more stable as it may
- crash the SILC if malformed data is sent as argument. There are a
- lot of places in client and server where we trust directly data coming
- from network and try to unformat it. The unformatting routine needs
- to be able handle situations where data sent is malformed, by mistake
- or intentionally. This is important as it is easy to crash the SILC
- now by just sending malformed data. Also, in client and server we
- must start checking the return value from silc_buffer_[un]format.
+ o IPv6 support for ID's and into the code.
-
-Other Things TODO
-=================
-
- o Write manuals for server.
-
- o Write manuals for client.
-
- o Write SILC Library Reference manual. This would include all the SILC
- API's with simple examples how the functions are to be used. This is
- pretty easy to create by taking all the functions plus their comments
- from source/header files. However, same sort of reference manual
- should be written for client and server as well.
+ o SIM support for SILC PKCS API needs to made so that they could be
+ used as SIM's. At the same time some work is required on prime
+ generation as the way it is done now sucks. Read from code for
+ more (silcpkcs.h).
TODO After 1.0
nice as SSH is widely used all over the place. SILC Protocol
supports SSH2 public keys.
- o IRC support for SILC client. This would be nice to have on client
- as it could be used to connect to SILC and IRC. People wouldn't
- have to have two different clients when same would work on both.
- I'd like to see this done as SIM, after the extended SIM support
- has been added to SILC.
-
o Cipher optimizations (asm, that this) at least for i386 would be nice.
projects / silc.git / blobdiff