+ o Read prefetch (read-ahead, reading ahead of time). Maybe if this can
+ be done easily.
+
+
+SKR Library, lib/silcskr/
+=========================
+
+ o Add fingerprint as search constraint.
+
+ o Add OpenPGP support. Adding, removing, fetching PGP keys. (Keyring
+ support?)
+
+ o Add support for importing public keys from a directory and/or from a
+ file. Add support for exporting the repository (different formats for
+ different key types?).
+
+ o Change the entire silc_skr_find API. Remove SilcSKRFind and just simply
+ add the find constraints as variable argument list to silc_skr_find, eg:
+
+ silc_skr_find(skr, schedule, callback, context,
+ SILC_SKR_FIND_PUBLIC_KEY, public_key,
+ SILC_SKR_FIND_COUNTRY, "FI",
+ SILC_SKR_FIND_USAGE, SILC_SKR_USAGE_AUTH,
+ SILC_SKR_FIND_END);
+
+ NULL argument would be ignored and skipped.
+
+ o Add OR logical rule in addition of the current default AND, eg:
+
+ // Found key(s) MUST have this public key AND this country.
+ silc_skr_find(skr, schedule, callback, context,
+ SILC_SKR_FIND_RULE_AND,
+ SILC_SKR_FIND_PUBLIC_KEY, public_key,
+ SILC_SKR_FIND_COUNTRY, "FI",
+ SILC_SKR_FIND_END);
+
+ // Found key(s) MUST have this public key OR this key context
+ silc_skr_find(skr, schedule, callback, context,
+ SILC_SKR_FIND_RULE_OR,
+ SILC_SKR_FIND_PUBLIC_KEY, public_key,
+ SILC_SKR_FIND_CONTEXT, key_context,
+ SILC_SKR_FIND_END);
+
+ o SilcStack to SKR API.
+
+
+Crypto Library, lib/silccrypt/
+==============================
+
+ o Add silc_crypto_init and silc_crypto_uninit. The _init should take
+ SilcStack that will act as global memory pool for all of crypto
+ library. It should not be necessary anymore to separately register
+ default ciphers, HMACs, etc, the _init would do that. However, if
+ user after _init calls silc_pkcs_register, for example, it would take
+ preference over the default once, ie. user can always dictate the
+ order of algorithms. (***DONE)
+
+ o Add fingerprint to SilcSILCPublicKey and retrieval to silcpk.h, and
+ possibly to silcpkcs.h.
+
+ /* Return fingerprint of the `public_key'. Returns also the algorithm
+ that has been used to make the fingerprint. */
+ const unsigned char *
+ silc_pkcs_get_fingerprint(SilcPublicKey public_key,
+ const char **hash_algorithm,
+ SilcUInt32 *fingerprint_len);
+
+ o Change SILC PKCS API to asynchronous, so that accelerators can be used.
+ All PKCS routines should now take callbacks as argument and they should
+ be delivered to SilcPKCSObject and SilcPKCSAlgorithm too. (***DONE)
+
+ o The asynchronous functions to perhaps to _async to preserve backwards
+ compatibility with synchronous versions, and make easier to migrate
+ from 1.1 to 1.2.
+
+ o Change PKCS Algorithm API to take SilcPKCSAlgorithm as argument to
+ encrypt, decrypt, sign and verify functions. We may need to for exmaple
+ check the alg->hash, supported hash functions. Maybe deliver it also
+ to all other functions in SilcPKCSAlgorithm to be consistent. (***DONE)
+
+ o Add DSA support to SILC public key.
+
+ o Add DSS support. (***DONE)
+
+ o Implement the defined SilcDH API. The definition is in
+ lib/silccrypt/silcdh.h. Make sure it is asynchronous so that it can
+ be accelerated. Also take into account that it could use elliptic
+ curves.
+
+ o Add ECDSA support.
+
+ o Add ECDH support.
+
+ o AES CBC is missing proper alignment code (see silc_1_1_branch).
+
+ o All cipher, hash, hmac etc. allocation routines should take their name
+ in as const char * not const unsigned char *. (***DONE)
+
+
+SILC Accelerator Library
+========================
+
+ o SILC Accelerator API. Provides generic way to use different kind of
+ accelerators. Basically implements SILC PKCS API so that SilcPublicKey
+ and SilcPrivateKey can be used but they call the accelerators.
+ (***DONE)
+
+ o Implement software accelerator. It is a thread pool system where the
+ public key and private key operations are executed in threads.
+ (***DONE)
+
+ o Add init options to SilcAcceleratorObject as a SilcAcceleratorOption
+ structure. Each accelerator defines the options that they support and
+ can be retrieved from the SilcAccelerator with silc_acc_get_options.
+ The format must also be machine parseable. The structure can be of the
+ following format:
+
+ typedef struct SilcAcceleratorOptionStruct {
+ const char *option; /* Option name */
+ const char *display_name; /* Option displayable name */
+ SilcParamType type; /* Option data format */
+ void *default_value; /* Option's default value */
+ SilcUInt32 default_value_len; /* Default value length */
+ } *SilcAcceleratorOption;
+
+ For software accelerator it could be for example:
+
+ { "min_threads", "Minimum threads", SILC_PARAM_UINT32, (void *)2, 4 },
+ { "max_threads", "Maximum threads", SILC_PARAM_UINT32, (void *)4, 4 },
+
+ o Diffie-Hellman acceleration
+
+ (o Symmetric key cryptosystem acceleration? They are always sycnhronouos
+ even with hardware acceleration so the crypto API shouldn't require
+ changes.) maybe
+
+
+lib/silcmath
+============
+
+ o Import TFM. We want TFM's speed but its memory requirements are
+ just too much. By default it uses large pre-allocated tables which
+ will eat memory when there are thousands of public keys in system.
+ We probably want to change TFM's fp_int dynamic so that a specific
+ size can be allocated for the int. We could have two new functions:
+
+ SilcBool silc_mp_init_size(SilcMPInt *mp, SilcUInt32 bit_size);
+ SilcBool silc_mp_sinit_size(SilcStack stack, SilcMPInt *mp,
+ SilcUInt32 bit_size);
+
+ Which by default allocates `bit_size' bits instead of some default
+ value. silc_mp_init would allocate the default FP_SIZE with TFM
+ and do normal init with TMA and GMP. _init_size with TMA and GMP
+ would be same as _init.
+
+ o Add AND, OR and XOR support to TFM or ask Tom to do it.
+
+ o The SILC MP API function must start returning indication of success
+ and failure of the operation.
+
+ o Do SilcStack support for silc_mp_init, silc_mp_init_size and other
+ any other MP function (including utility ones) that may allocate
+ memory.
+
+ o Prime generation progress using callback instead of printing to
+ stdout.
+
+ o All utility functions should be made non-allocating ones.
+
+
+SILC XML Library, lib/silcxml/
+==============================
+
+ o SILC XML API (wrapper to expat). Look at the expat API and simplify
+ it. The SILC XML API should have at most 8-10 API functions. It should
+ be possible to create full XML parser with only one function. And, it
+ should be possible to have a function that is able to parse an entire
+ XML document. It should also have a parser function to be able to
+ parse a stream of XML data (SilcStream). It MUST NOT have operations
+ that require multiple function calls to be able to execute that one
+ operation (like creating parser).
+
+
+lib/silcske/silcske.[ch]
+========================
+
+ o Ratelimit to UDP/IP transport for incoming packets.
+
+
+lib/silcasn1
+============
+
+ o Negative integer encoding is missing, add it.
+
+ o SILC_ASN1_CHOICE should perhaps return an index what choice in the
+ choice list was found. Currently it is left for caller to figure out
+ which choice was found. (***DONE)
+
+ o SILC_ASN1_NULL in decoding should return SilcBool whether or not
+ the NULL was present. It's important when it's SILC_ASN1_OPTIONAL
+ and we need to know whether it was present or not. (***DONE)
+
+
+lib/silcpgp
+===========
+
+ o OpenPGP certificate support, allowing the use of PGP public keys.
+
+
+lib/silcssh
+===========
+
+ o SSH2 public key/private key support, allowing the use of SSH2 keys.
+ RFC 4716. (***DONE)
+
+
+lib/silcpkix
+============
+
+ o PKIX implementation
+
+
+apps/silcd
+==========
+
+ o Deprecate the old server. Write interface for the new lib/silcserver
+ server library. The interface should work on Unix/Linux systems.
+
+ o Consider deprecating also the old config file format and use XML
+ istead. This should require SILC XML API implementation first.
+
+ o The configuration must support dynamic router and server connections.
+ The silcd must work without specifying any servers or routers to
+ connect to.
+
+ o The configuration must support specifying whether the server is
+ SILC Server or SILC Router. This should not be deduced from the
+ configuration as it was in < 1.2.
+
+ o The configuration must support specifying the ciphers and hmacs and
+ their order so that user can specify which algorithms take preference.
+
+
+lib/silcserver
+==============
+
+ o Rewrite the entire server. Deprecate apps/silcd as the main server
+ implementation and create lib/silcserver/. It is a platform
+ independent server library. The apps/silcd will merely provide a
+ a simple interface for the library.
+
+ o Write the SILC Server library extensively using SILC FSM.
+
+ o Server library must support multiple networks. This means that one
+ server must be able to create multiple connections that each reach
+ different SILC network. This means also that all cache's etc. must
+ be either connection-specific or network-specific.
+
+ o Library must support dynamic router and server connections. This means
+ that connections are create only when they are needed, like when someone
+ says JOIN foo@foo.bar.com or WHOIS foobar@silcnet.org.
+
+ o Library must support server-to-server connections even though protocol
+ prohibits that. The responder of the connection should automatically
+ act as a router. The two servers create an own, isolated, SILC network.
+ To be used specifically with dynamic connections.
+
+ o Library must support multiple threads and must be entirely thread safe.
+
+ o Library must have support for SERVICE command.
+
+ o Both UDP and TCP support for incoming connecetions. Maintaining long
+ term UDP sessions.
+
+ o The server must be able to run behind NAT device. This means that
+ Server ID must be based on public IP instead of private IP (See
+ also NAT detection protocol in SILC protocol specification).
+
+ o The following data must be in per-connection context: client id cache,
+ server id cache, channel id cache, all statistics must be
+ per-connection.
+
+ o The following data must be in per-thread context: command context
+ freelist/pool, pending commands, random number generator.
+
+ o Do inccoming packet processing in an own FSM thread in the
+ server-threads FSM. Same as in client library.
+
+ o Binding to other ports than 706 too. To allow easier traversing
+ through NATs and firewalls server should also bind to 80, 443 and 7706
+ by default (at least try to bind). Connections must work normally
+ even if they were established to some other port other than 706.
+
+ Connection option that attemps to connect to remot server with various
+ different mechanisms: UDP 706, TCP 706, TCP 80, TCP 443, UDP 7706 and
+ TCP 7706. This is the so called hole punching mechanism.