From 666b188b3df4c0ec00f5e11ad37bef3a3f2647bd Mon Sep 17 00:00:00 2001 From: SoniEx2 Date: Fri, 9 Oct 2020 19:39:22 -0300 Subject: Add updated clog.md from rust-clogsim --- v-1 | 94 --------------------------------------------------------------------- 1 file changed, 94 deletions(-) delete mode 100644 v-1 (limited to 'v-1') diff --git a/v-1 b/v-1 deleted file mode 100644 index 3c3000f..0000000 --- a/v-1 +++ /dev/null @@ -1,94 +0,0 @@ -CAP prefix/clog -=============== - -Copyright (c) Soni L. \ - -This capability provides a mechanism for identifying and conveying a cryptographically secured list of messages to IRC clients. - -This specification also suggests a mechanism by which IRC clients can sync logs, using the information provided by this capability. - -Cap syntax ----------- - -The capability shall be specified as - - prefix/clog=hash_type,hash_type/tag,tag,tag - -Example: - - prefix/clog=sha1,sha256/server-time - -`server-time` is always implicitly specified, and should be omitted. - -The `HASH` S2C command ----------------------- - -The `HASH` command shall be sent for hashes associated with a channel. - -Each hash must be a cryptographic hash. Non-cryptographic hashes must be ignored. Broken hash algorithms should be avoided. MD5 is explicitly disallowed and must not be used. - -The counter must be able to store numbers in the `0..2^62-1` range. - -These hashes specify the current "heads" of the clog. This is similar to git heads, if you're familiar with them. - -Syntax: - - HASH #channel :hash_type=counter/hash,type=counter/hash,... - -Example: - - >>> JOIN #channel - <<< JOIN #channel - <<< NAMES etc - <<< HASH #channel :sha1=20,something_long - <<< HASH #channel :sha1=60,something_else sha256=70,another - -Optionally, the server may include a server name with the HASH command: - - <<< :server1.example.com HASH #channel :etc - <<< :server2.example.com HASH #channel :other - -The `hash` message tag ----------------------- - -The `hash` mesaage tag shall be sent with every `PRIVMSG`, `TOPIC` and `NOTICE`. - -Syntax: - - hash=type=counter/short_hash,type=counter/short_hash,... - -The use of `short_hash` lowers bandwidth requirements. Consult your cryptography expert for best practices on using cryptography. - -These hashes specify the previous "head(s)" of the clog. "Merges" are just messages with hashes from different sources. - -Example: - - TODO - -Security Considerations ------------------------ - -Clogs are meant for channels that want public logging. An example is the Rust IRC channel. As such, anything in a clog should be assumed public. - -It's possible to recover deleted clogs by setting up a separate IRC network and sending the right hashes on the right channel. However, you'd still need to know the hashes. -Thus, this isn't a vulnerability, because if you had the hashes, you could just request the logs directly, without going through the process of setting up an IRC network. - -The network could be made to sign all hashes, but you'd need to share the signing key across all servers for it to work correctly. This still doesn't prevent someone -from getting access to an intercepted, correctly-signed hash, and by sharing the signing key you increase the attack surface. - -[FIXME there may be more] - -The `SYNC` CTCP (informative) ------------------------------ - -*This section is informative.* - -The `SYNC` CTCP is a hypothetical CTCP for syncing logs. - -Syntax: - - SYNC <...> -[nospam+checksum] - -This is a highly flexible command supporting ipv4, ipv6, hostname, tor, i2p and tox ID. - -Messages sent over non-tox channels must be encrypted with the tox-compatible public key. -- cgit 1.4.1