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-rw-r--r--plugins/mod_compression.lua205
-rw-r--r--util/hmac.lua49
-rw-r--r--util/sasl/plain.lua2
-rw-r--r--util/sasl/scram.lua27
4 files changed, 189 insertions, 94 deletions
diff --git a/plugins/mod_compression.lua b/plugins/mod_compression.lua
index f1cae737..802e1822 100644
--- a/plugins/mod_compression.lua
+++ b/plugins/mod_compression.lua
@@ -8,16 +8,16 @@
local st = require "util.stanza";
local zlib = require "zlib";
local pcall = pcall;
-
local xmlns_compression_feature = "http://jabber.org/features/compress"
local xmlns_compression_protocol = "http://jabber.org/protocol/compress"
+local xmlns_stream = "http://etherx.jabber.org/streams";
local compression_stream_feature = st.stanza("compression", {xmlns=xmlns_compression_feature}):tag("method"):text("zlib"):up();
local compression_level = module:get_option("compression_level");
-
-- if not defined assume admin wants best compression
if compression_level == nil then compression_level = 9 end;
+
compression_level = tonumber(compression_level);
if not compression_level or compression_level < 1 or compression_level > 9 then
module:log("warn", "Invalid compression level in config: %s", tostring(compression_level));
@@ -34,89 +34,180 @@ module:add_event_hook("stream-features",
end
);
+module:hook("s2s-stream-features",
+ function (data)
+ local session, features = data.session, data.features;
+ -- FIXME only advertise compression support when TLS layer has no compression enabled
+ if not session.compressed then
+ features:add_child(compression_stream_feature);
+ end
+ end
+);
+
+-- S2Sout handling aka the client perspective in the S2S connection
+module:hook_stanza(xmlns_stream, "features",
+ function (session, stanza)
+ if not session.compressed then
+ -- does remote server support compression?
+ local comp_st = stanza:child_with_name("compression");
+ if comp_st then
+ -- do we support the mechanism
+ for a in comp_st:children() do
+ local algorithm = a[1]
+ if algorithm == "zlib" then
+ session.sends2s(st.stanza("compress", {xmlns=xmlns_compression_protocol}):tag("method"):text("zlib"))
+ session.log("info", "Enabled compression using zlib.")
+ return true;
+ end
+ end
+ session.log("debug", "Remote server supports no compression algorithm we support.")
+ end
+ end
+ end
+, 250);
+
+
+-- returns either nil or a fully functional ready to use inflate stream
+local function get_deflate_stream(session)
+ local status, deflate_stream = pcall(zlib.deflate, compression_level);
+ if status == false then
+ local error_st = st.stanza("failure", {xmlns=xmlns_compression_protocol}):tag("setup-failed");
+ (session.sends2s or session.send)(error_st);
+ session.log("error", "Failed to create zlib.deflate filter.");
+ module:log("error", deflate_stream);
+ return
+ end
+ return deflate_stream
+end
+
+-- returns either nil or a fully functional ready to use inflate stream
+local function get_inflate_stream(session)
+ local status, inflate_stream = pcall(zlib.inflate);
+ if status == false then
+ local error_st = st.stanza("failure", {xmlns=xmlns_compression_protocol}):tag("setup-failed");
+ (session.sends2s or session.send)(error_st);
+ session.log("error", "Failed to create zlib.deflate filter.");
+ module:log("error", inflate_stream);
+ return
+ end
+ return inflate_stream
+end
+
+-- setup compression for a stream
+local function setup_compression(session, deflate_stream)
+ local old_send = (session.sends2s or session.send);
+
+ local new_send = function(t)
+ --TODO: Better code injection in the sending process
+ session.log(t)
+ local status, compressed, eof = pcall(deflate_stream, tostring(t), 'sync');
+ if status == false then
+ session:close({
+ condition = "undefined-condition";
+ text = compressed;
+ extra = st.stanza("failure", {xmlns="http://jabber.org/protocol/compress"}):tag("processing-failed");
+ });
+ module:log("warn", compressed);
+ return;
+ end
+ session.conn:write(compressed);
+ end;
+
+ if session.sends2s then session.sends2s = new_send
+ elseif session.send then session.send = new_send end
+end
+
+-- setup decompression for a stream
+local function setup_decompression(session, inflate_stream)
+ local old_data = session.data
+ session.data = function(conn, data)
+ local status, decompressed, eof = pcall(inflate_stream, data);
+ if status == false then
+ session:close({
+ condition = "undefined-condition";
+ text = decompressed;
+ extra = st.stanza("failure", {xmlns="http://jabber.org/protocol/compress"}):tag("processing-failed");
+ });
+ module:log("warn", decompressed);
+ return;
+ end
+ old_data(conn, decompressed);
+ end;
+end
+
-- TODO Support compression on S2S level too.
-module:add_handler({"c2s_unauthed", "c2s"}, "compress", xmlns_compression_protocol,
+module:add_handler({"s2sout_unauthed", "s2sout"}, "compressed", xmlns_compression_protocol,
+ function(session ,stanza)
+ session.log("debug", "Activating compression...")
+ -- create deflate and inflate streams
+ deflate_stream = get_deflate_stream(session);
+ if not deflate_stream then return end
+
+ inflate_stream = get_inflate_stream(session);
+ if not inflate_stream then return end
+
+ -- setup compression for session.w
+ setup_compression(session, deflate_stream);
+
+ -- setup decompression for session.data
+ setup_decompression(session, inflate_stream);
+ local session_reset_stream = session.reset_stream;
+ session.reset_stream = function(session)
+ session_reset_stream(session);
+ setup_decompression(session, inflate_stream);
+ return true;
+ end;
+ session:reset_stream();
+ local default_stream_attr = {xmlns = "jabber:server", ["xmlns:stream"] = "http://etherx.jabber.org/streams",
+ ["xmlns:db"] = 'jabber:server:dialback', version = "1.0", to = session.to_host, from = session.from_host};
+ session.sends2s("<?xml version='1.0'?>");
+ session.sends2s(st.stanza("stream:stream", default_stream_attr):top_tag());
+ session.compressed = true;
+ end
+);
+
+module:add_handler({"c2s_unauthed", "c2s", "s2sin_unauthed", "s2sin"}, "compress", xmlns_compression_protocol,
function(session, stanza)
-- fail if we are already compressed
if session.compressed then
local error_st = st.stanza("failure", {xmlns=xmlns_compression_protocol}):tag("unsupported-method");
- session.send(error_st);
- session:log("warn", "Tried to establish another compression layer.");
+ (session.sends2s or session.send)(error_st);
+ session.log("warn", "Tried to establish another compression layer.");
end
-- checking if the compression method is supported
local method = stanza:child_with_name("method")[1];
if method == "zlib" then
session.log("info", method.." compression selected.");
- session.send(st.stanza("compressed", {xmlns=xmlns_compression_protocol}));
- session:reset_stream();
-- create deflate and inflate streams
- local status, deflate_stream = pcall(zlib.deflate, compression_level);
- if status == false then
- local error_st = st.stanza("failure", {xmlns=xmlns_compression_protocol}):tag("setup-failed");
- session.send(error_st);
- session:log("error", "Failed to create zlib.deflate filter.");
- module:log("error", deflate_stream);
- return
- end
+ deflate_stream = get_deflate_stream(session);
+ if not deflate_stream then return end
- local status, inflate_stream = pcall(zlib.inflate);
- if status == false then
- local error_st = st.stanza("failure", {xmlns=xmlns_compression_protocol}):tag("setup-failed");
- session.send(error_st);
- session:log("error", "Failed to create zlib.deflate filter.");
- module:log("error", inflate_stream);
- return
- end
+ inflate_stream = get_inflate_stream(session);
+ if not inflate_stream then return end
- -- setup compression for session.w
- local old_send = session.send;
+ (session.sends2s or session.send)(st.stanza("compressed", {xmlns=xmlns_compression_protocol}));
+ session:reset_stream();
- session.send = function(t)
- local status, compressed, eof = pcall(deflate_stream, tostring(t), 'sync');
- if status == false then
- session:close({
- condition = "undefined-condition";
- text = compressed;
- extra = st.stanza("failure", {xmlns="http://jabber.org/protocol/compress"}):tag("processing-failed");
- });
- module:log("warn", compressed);
- return;
- end
- old_send(compressed);
- end;
+ -- setup compression for session.w
+ setup_compression(session, deflate_stream);
-- setup decompression for session.data
- local function setup_decompression(session)
- local old_data = session.data
- session.data = function(conn, data)
- local status, decompressed, eof = pcall(inflate_stream, data);
- if status == false then
- session:close({
- condition = "undefined-condition";
- text = decompressed;
- extra = st.stanza("failure", {xmlns="http://jabber.org/protocol/compress"}):tag("processing-failed");
- });
- module:log("warn", decompressed);
- return;
- end
- old_data(conn, decompressed);
- end;
- end
- setup_decompression(session);
+ setup_decompression(session, inflate_stream);
local session_reset_stream = session.reset_stream;
session.reset_stream = function(session)
session_reset_stream(session);
- setup_decompression(session);
+ setup_decompression(session, inflate_stream);
return true;
end;
session.compressed = true;
else
session.log("info", method.." compression selected. But we don't support it.");
local error_st = st.stanza("failure", {xmlns=xmlns_compression_protocol}):tag("unsupported-method");
- session.send(error_st);
+ (session.sends2s or session.send)(error_st);
end
end
);
+
diff --git a/util/hmac.lua b/util/hmac.lua
index 18c559b2..ffd69d91 100644
--- a/util/hmac.lua
+++ b/util/hmac.lua
@@ -7,27 +7,20 @@
--
local hashes = require "util.hashes"
+local xor = require "bit".bxor
+local t_insert, t_concat = table.insert, table.concat;
local s_char = string.char;
-local s_gsub = string.gsub;
-local s_rep = string.rep;
module "hmac"
-local xor_map = {0;1;2;3;4;5;6;7;8;9;10;11;12;13;14;15;1;0;3;2;5;4;7;6;9;8;11;10;13;12;15;14;2;3;0;1;6;7;4;5;10;11;8;9;14;15;12;13;3;2;1;0;7;6;5;4;11;10;9;8;15;14;13;12;4;5;6;7;0;1;2;3;12;13;14;15;8;9;10;11;5;4;7;6;1;0;3;2;13;12;15;14;9;8;11;10;6;7;4;5;2;3;0;1;14;15;12;13;10;11;8;9;7;6;5;4;3;2;1;0;15;14;13;12;11;10;9;8;8;9;10;11;12;13;14;15;0;1;2;3;4;5;6;7;9;8;11;10;13;12;15;14;1;0;3;2;5;4;7;6;10;11;8;9;14;15;12;13;2;3;0;1;6;7;4;5;11;10;9;8;15;14;13;12;3;2;1;0;7;6;5;4;12;13;14;15;8;9;10;11;4;5;6;7;0;1;2;3;13;12;15;14;9;8;11;10;5;4;7;6;1;0;3;2;14;15;12;13;10;11;8;9;6;7;4;5;2;3;0;1;15;14;13;12;11;10;9;8;7;6;5;4;3;2;1;0;};
-local function xor(x, y)
- local lowx, lowy = x % 16, y % 16;
- local hix, hiy = (x - lowx) / 16, (y - lowy) / 16;
- local lowr, hir = xor_map[lowx * 16 + lowy + 1], xor_map[hix * 16 + hiy + 1];
- local r = hir * 16 + lowr;
- return r;
-end
-local opadc, ipadc = s_char(0x5c), s_char(0x36);
-local ipad_map = {};
-local opad_map = {};
-for i=0,255 do
- ipad_map[s_char(i)] = s_char(xor(0x36, i));
- opad_map[s_char(i)] = s_char(xor(0x5c, i));
+local function arraystr(array)
+ local t = {}
+ for i = 1,#array do
+ t_insert(t, s_char(array[i]))
+ end
+
+ return t_concat(t)
end
--[[
@@ -43,15 +36,31 @@ hex
return raw hash or hexadecimal string
--]]
function hmac(key, message, hash, blocksize, hex)
+ local opad = {}
+ local ipad = {}
+
+ for i = 1,blocksize do
+ opad[i] = 0x5c
+ ipad[i] = 0x36
+ end
+
if #key > blocksize then
key = hash(key)
end
- local padding = blocksize - #key;
- local ipad = s_gsub(key, ".", ipad_map)..s_rep(ipadc, padding);
- local opad = s_gsub(key, ".", opad_map)..s_rep(opadc, padding);
+ for i = 1,#key do
+ ipad[i] = xor(ipad[i],key:sub(i,i):byte())
+ opad[i] = xor(opad[i],key:sub(i,i):byte())
+ end
+
+ opad = arraystr(opad)
+ ipad = arraystr(ipad)
- return hash(opad..hash(ipad..message), hex)
+ if hex then
+ return hash(opad..hash(ipad..message), true)
+ else
+ return hash(opad..hash(ipad..message))
+ end
end
function md5(key, message, hex)
diff --git a/util/sasl/plain.lua b/util/sasl/plain.lua
index ae5c777a..a4c8765d 100644
--- a/util/sasl/plain.lua
+++ b/util/sasl/plain.lua
@@ -24,7 +24,7 @@ local function plain(self, message)
return "failure", "malformed-request";
end
- local authorization, authentication, password = s_match(message, "^([^%z]*)%z([^%z]+)%z([^%z]+)");
+ local authorization, authentication, password = s_match(message, "^([^%z]+)%z([^%z]+)%z([^%z]+)");
if not authorization then
return "failure", "malformed-request";
diff --git a/util/sasl/scram.lua b/util/sasl/scram.lua
index 4f800529..be82c60e 100644
--- a/util/sasl/scram.lua
+++ b/util/sasl/scram.lua
@@ -21,9 +21,6 @@ local sha1 = require "util.hashes".sha1;
local generate_uuid = require "util.uuid".generate;
local saslprep = require "util.encodings".stringprep.saslprep;
local log = require "util.logger".init("sasl");
-local t_concat = table.concat;
-local char = string.char;
-local byte = string.byte;
module "scram"
@@ -39,19 +36,17 @@ local function bp( b )
return result
end
-local xor_map = {0;1;2;3;4;5;6;7;8;9;10;11;12;13;14;15;1;0;3;2;5;4;7;6;9;8;11;10;13;12;15;14;2;3;0;1;6;7;4;5;10;11;8;9;14;15;12;13;3;2;1;0;7;6;5;4;11;10;9;8;15;14;13;12;4;5;6;7;0;1;2;3;12;13;14;15;8;9;10;11;5;4;7;6;1;0;3;2;13;12;15;14;9;8;11;10;6;7;4;5;2;3;0;1;14;15;12;13;10;11;8;9;7;6;5;4;3;2;1;0;15;14;13;12;11;10;9;8;8;9;10;11;12;13;14;15;0;1;2;3;4;5;6;7;9;8;11;10;13;12;15;14;1;0;3;2;5;4;7;6;10;11;8;9;14;15;12;13;2;3;0;1;6;7;4;5;11;10;9;8;15;14;13;12;3;2;1;0;7;6;5;4;12;13;14;15;8;9;10;11;4;5;6;7;0;1;2;3;13;12;15;14;9;8;11;10;5;4;7;6;1;0;3;2;14;15;12;13;10;11;8;9;6;7;4;5;2;3;0;1;15;14;13;12;11;10;9;8;7;6;5;4;3;2;1;0;};
-
-local result = {};
local function binaryXOR( a, b )
- for i=1, #a do
- local x, y = byte(a, i), byte(b, i);
- local lowx, lowy = x % 16, y % 16;
- local hix, hiy = (x - lowx) / 16, (y - lowy) / 16;
- local lowr, hir = xor_map[lowx * 16 + lowy + 1], xor_map[hix * 16 + hiy + 1];
- local r = hir * 16 + lowr;
- result[i] = char(r)
+ if a:len() > b:len() then
+ b = string.rep("\0", a:len() - b:len())..b
+ elseif string.len(a) < string.len(b) then
+ a = string.rep("\0", b:len() - a:len())..a
+ end
+ local result = ""
+ for i=1, a:len() do
+ result = result..string.char(xor(a:byte(i), b:byte(i)))
end
- return t_concat(result);
+ return result
end
-- hash algorithm independent Hi(PBKDF2) implementation
@@ -121,9 +116,9 @@ local function scram_sha_1(self, message)
return "failure", "malformed-request", "Missing an attribute(p, r or c) in SASL message.";
end
- local password, state;
+ local password;
if self.profile.plain then
- password, state = self.profile.plain(self.state.name, self.realm)
+ local password, state = self.profile.plain(self.state.name, self.realm)
if state == nil then return "failure", "not-authorized"
elseif state == false then return "failure", "account-disabled" end
password = saslprep(password);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 21:22:25 +0000