Adding upstream version 3.8.1.upstream/3.8.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 197 insertions, 0 deletions

diff --git a/lualib/lua_scanners/kaspersky_av.lua b/lualib/lua_scanners/kaspersky_av.lua
new file mode 100644
index 0000000..d52cef0
--- /dev/null
+++ b/lualib/lua_scanners/kaspersky_av.lua
@@ -0,0 +1,197 @@
+--[[
+Copyright (c) 2022, Vsevolod Stakhov <vsevolod@rspamd.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+]]--
+
+--[[[
+-- @module kaspersky
+-- This module contains kaspersky antivirus access functions
+--]]
+
+local lua_util = require "lua_util"
+local tcp = require "rspamd_tcp"
+local upstream_list = require "rspamd_upstream_list"
+local rspamd_util = require "rspamd_util"
+local rspamd_logger = require "rspamd_logger"
+local common = require "lua_scanners/common"
+
+local N = "kaspersky"
+
+local default_message = '${SCANNER}: virus found: "${VIRUS}"'
+
+local function kaspersky_config(opts)
+  local kaspersky_conf = {
+    name = N,
+    scan_mime_parts = true,
+    scan_text_mime = false,
+    scan_image_mime = false,
+    product_id = 0,
+    log_clean = false,
+    timeout = 5.0,
+    retransmits = 1, -- use local files, retransmits are useless
+    cache_expire = 3600, -- expire redis in one hour
+    message = default_message,
+    detection_category = "virus",
+    tmpdir = '/tmp',
+  }
+
+  kaspersky_conf = lua_util.override_defaults(kaspersky_conf, opts)
+
+  if not kaspersky_conf.prefix then
+    kaspersky_conf.prefix = 'rs_' .. kaspersky_conf.name .. '_'
+  end
+
+  if not kaspersky_conf.log_prefix then
+    if kaspersky_conf.name:lower() == kaspersky_conf.type:lower() then
+      kaspersky_conf.log_prefix = kaspersky_conf.name
+    else
+      kaspersky_conf.log_prefix = kaspersky_conf.name .. ' (' .. kaspersky_conf.type .. ')'
+    end
+  end
+
+  if not kaspersky_conf['servers'] then
+    rspamd_logger.errx(rspamd_config, 'no servers defined')
+
+    return nil
+  end
+
+  kaspersky_conf['upstreams'] = upstream_list.create(rspamd_config,
+      kaspersky_conf['servers'], 0)
+
+  if kaspersky_conf['upstreams'] then
+    lua_util.add_debug_alias('antivirus', kaspersky_conf.name)
+    return kaspersky_conf
+  end
+
+  rspamd_logger.errx(rspamd_config, 'cannot parse servers %s',
+      kaspersky_conf['servers'])
+  return nil
+end
+
+local function kaspersky_check(task, content, digest, rule, maybe_part)
+  local function kaspersky_check_uncached ()
+    local upstream = rule.upstreams:get_upstream_round_robin()
+    local addr = upstream:get_addr()
+    local retransmits = rule.retransmits
+    local fname = string.format('%s/%s.tmp',
+        rule.tmpdir, rspamd_util.random_hex(32))
+    local message_fd = rspamd_util.create_file(fname)
+    local clamav_compat_cmd = string.format("nSCAN %s\n", fname)
+
+    if not message_fd then
+      rspamd_logger.errx('cannot store file for kaspersky scan: %s', fname)
+      return
+    end
+
+    if type(content) == 'string' then
+      -- Create rspamd_text
+      local rspamd_text = require "rspamd_text"
+      content = rspamd_text.fromstring(content)
+    end
+    content:save_in_file(message_fd)
+
+    -- Ensure file cleanup
+    task:get_mempool():add_destructor(function()
+      os.remove(fname)
+      rspamd_util.close_file(message_fd)
+    end)
+
+    local function kaspersky_callback(err, data)
+      if err then
+
+        -- retry with another upstream until retransmits exceeds
+        if retransmits > 0 then
+
+          retransmits = retransmits - 1
+
+          -- Select a different upstream!
+          upstream = rule.upstreams:get_upstream_round_robin()
+          addr = upstream:get_addr()
+
+          lua_util.debugm(rule.name, task, '%s: error: %s; retry IP: %s; retries left: %s',
+              rule.log_prefix, err, addr, retransmits)
+
+          tcp.request({
+            task = task,
+            host = addr:to_string(),
+            port = addr:get_port(),
+            upstream = upstream,
+            timeout = rule['timeout'],
+            callback = kaspersky_callback,
+            data = { clamav_compat_cmd },
+            stop_pattern = '\n'
+          })
+        else
+          rspamd_logger.errx(task,
+              '%s [%s]: failed to scan, maximum retransmits exceed',
+              rule['symbol'], rule['type'])
+          common.yield_result(task, rule,
+              'failed to scan and retransmits exceed', 0.0, 'fail',
+              maybe_part)
+        end
+
+      else
+        data = tostring(data)
+        local cached
+        lua_util.debugm(rule.name, task,
+            '%s [%s]: got reply: %s',
+            rule['symbol'], rule['type'], data)
+        if data == 'stream: OK' or data == fname .. ': OK' then
+          cached = 'OK'
+          common.log_clean(task, rule)
+        else
+          local vname = string.match(data, ': (.+) FOUND')
+          if vname then
+            common.yield_result(task, rule, vname, 1.0, nil, maybe_part)
+            cached = vname
+          else
+            rspamd_logger.errx(task, 'unhandled response: %s', data)
+            common.yield_result(task, rule, 'unhandled response',
+                0.0, 'fail', maybe_part)
+          end
+        end
+        if cached then
+          common.save_cache(task, digest, rule, cached, 1.0, maybe_part)
+        end
+      end
+    end
+
+    tcp.request({
+      task = task,
+      host = addr:to_string(),
+      port = addr:get_port(),
+      upstream = upstream,
+      timeout = rule['timeout'],
+      callback = kaspersky_callback,
+      data = { clamav_compat_cmd },
+      stop_pattern = '\n'
+    })
+  end
+
+  if common.condition_check_and_continue(task, content, rule, digest,
+      kaspersky_check_uncached, maybe_part) then
+    return
+  else
+    kaspersky_check_uncached()
+  end
+
+end
+
+return {
+  type = 'antivirus',
+  description = 'kaspersky antivirus',
+  configure = kaspersky_config,
+  check = kaspersky_check,
+  name = N
+}