mirror of
https://github.com/casjaysdevdocker/squidguard
synced 2025-01-19 00:34:26 -05:00
251 lines
7.4 KiB
Plaintext
251 lines
7.4 KiB
Plaintext
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# Storyboard library file
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# For ease of upgrade DO NOT CHANGE THIS library file
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# Make your function changes by overriding functions
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# in the site.story file - for site wide changes
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# and in filtergroup specific story file - see examplef1.story
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#
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# This library is built to largely duplicate the logic in V4
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#
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# Many e2guardian[f1].conf flags are replaced by overiding
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# library functions - see site.story and examplef1.story
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#
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# Simple functions are defined which control the logic flow and the
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# lists that are used. See notes/Storyboard for details.
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#
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# The entry point in v5 for standard filtering is 'checkrequest'
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#
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# Entry function called by proxy module to check http request
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function(checkrequest)
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if(viruscheckset) checknoscanlists
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if(bypassallowset) checknobypasslists
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if(exceptionset) return true
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if(fullurlin,searchterms) setsearchterm
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ifnot(greyset) returnif localcheckrequest
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if(connect) return sslrequestcheck
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ifnot(greyset) returnif exceptioncheck
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ifnot(greyset) greycheck
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ifnot(greyset) returnif bannedcheck
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if(fullurlin, change) setmodurl
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if(true) returnif embeddedcheck
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if(headerin,headermods) setmodheader
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if(fullurlin, addheader) setaddheader
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if(searchin,override) return setgrey
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if(searchin,banned) return setblock
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if(fullurlin,redirect) return setredirect
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if(true) setgrey
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# Entry function called by proxy module to check http response
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function(checkresponse)
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if(exceptionset) return false
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if(viruscheckset) checknoscantypes
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if(urlin,exceptionfile) return false
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if(true) return checkfiletype
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# Entry function called by THTTPS module to check https request
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function(thttps-checkrequest)
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if(true) returnif localsslrequestcheck
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if(true) returnif sslrequestcheck
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ifnot(hassniset) checksni
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# Entry function called by ICAP module to check reqmod
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function(icap-checkrequest)
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#unless blocked or redirect or connect - leave logging for RESPMOD
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if(connect) return icapsslrequestcheck
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ifnot(greyset) icap-checkrequest2
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if(redirectset) return true
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ifnot(blockset) setnolog
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function(icap-checkrequest2)
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if(viruscheckset) checknoscanlists
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if(bypassallowset) checknobypasslists
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if(exceptionset) return true
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if(fullurlin,searchterms) setsearchterm
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ifnot(greyset) returnif localcheckrequest
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ifnot(greyset) returnif exceptioncheck
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ifnot(greyset) greycheck
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ifnot(greyset) returnif bannedcheck
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if(fullurlin, change) setmodurl
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if(true) returnif embeddedcheck
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if(headerin,headermods) setmodheader
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if(fullurlin, addheader) setaddheader
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if(searchin,override) return setgrey
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if(searchin,banned) return setblock
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if(true) setgrey
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# Entry function called by ICAP module to check respmod
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function(icap-checkresponse)
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if(viruscheckset) checknoscanlists
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if(true) return checkresponse
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# Checks embeded urls
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# returns true if blocked, otherwise false
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function(embeddedcheck)
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if(embeddedin, localexception) return false
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if(embeddedin, localgrey) return false
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if(embeddedin, localbanned) return setblock
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if(embeddedin, exception) return false
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if(embeddedin, grey) return false
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if(embeddedin, banned) return setblock
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# Local checks
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# returns true if matches local exception or banned
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function(localcheckrequest)
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if(connect) return localsslrequestcheck
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ifnot(greyset) returnif localexceptioncheck
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ifnot(greyset) localgreycheck
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ifnot(greyset) returnif localbannedcheck
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if(searchin,localbanned) return setblock
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# Local SSL checks
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# returns true if matches local exception
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function(localsslrequestcheck)
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if(sitein, localexception) return setexception
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if(sitein, localgreyssl) returnif sslcheckmitm
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if(sitein, localbanned) true
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ifnot(returnset) return false
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if(true) returnif sslcheckmitm
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if(true) return setblock
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# SSL site replace (used instead of dns kulge)
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# returns true on match and successful replacement
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function(sslreplace)
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if(fullurlin,sslreplace) return setconnectsite
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if(true) return false
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# Local grey check
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# returns true on match
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function(localgreycheck)
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if(urlin, localgrey) return setgrey
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# Local banned check
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# returns true on match
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function(localbannedcheck)
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if(urlin, localbanned) return setblock
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# Local exception check
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# returns true on match
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function(localexceptioncheck)
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if(urlin, localexception) return setexception
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# Exception check
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# returns true on match
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function(exceptioncheck)
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if(urlin, exception) return setexception
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if(headerin, exceptionheader) return setexception
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if(useragentin, exceptionuseragent) return setexception
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# SSL Exception check
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# returns true on match
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function(sslexceptioncheck)
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if(sitein, exception) return setexception
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if(headerin, exceptionheader) return setexception
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if(useragentin, exceptionuseragent) return setexception
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if(true) return false
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# Greylist check
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# returns true on match
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function(greycheck)
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if(urlin, grey) return setgrey
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# Banned list check
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# returns true on match
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function(bannedcheck)
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if(true) returnif checkblanketblock
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if(urlin, banned) return setblock
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if(urlin,bannedextension) return setblock
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if(useragentin, banneduseragent) return setblock
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if(headerin, bannedheader) return setblock
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# Local SSL list(s) check
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# returns true on match
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function(localsslcheckrequest)
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if(sitein, localexception) return setexception
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#if(sitein, localbanned) return setblock
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# Check whether to go MITM
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# returns true if yes, false if no
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function(sslcheckmitm)
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# use next line to have general MITM
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if(true) return sslcheckmitmgeneral
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# use next line instead of last to limit MITM to greylist
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#if(true) return sslcheckmitmgreyonly
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# Always go MITM
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# returns true if yes, false if no
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function(sslcheckmitmgeneral)
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if(true) setgomitm
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ifnot(returnset) return false
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if(sitein, nocheckcert) setnocheckcert
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if(true) sslreplace
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if(true) return true
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# Only go MITM when in greyssl list
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# returns true if yes, false if no
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function(sslcheckmitmgreyonly)
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if(sitein, greyssl) setgomitm
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ifnot(returnset) return false
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if(sitein, nocheckcert) setnocheckcert
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if(true) sslreplace
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if(true) return true
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# SSL request check
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# returns true if exception or gomitm
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function(sslrequestcheck)
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if(true) returnif sslexceptioncheck
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if(true) returnif sslcheckmitm
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if(sitein, banned) return setblock
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if(true) sslreplace
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ifnot(returnset) returnif sslcheckblanketblock
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if(true) setgrey
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function(checknoscanlists)
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if(urlin,exceptionvirus) unsetviruscheck
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function(checknoscantypes)
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if(mimein,exceptionvirus) return unsetviruscheck
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if(extensionin,exceptionvirus) return unsetviruscheck
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function(checknobypasslists)
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if(urlin,bannedbypass) return unsetbypassallow
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# ICAP SSL request check
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# returns true if exception
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function(icapsslrequestcheck)
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if(true) returnif icapsquidbump
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if(true) returnif sslexceptioncheck
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if(true) sslreplace
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if(sitein, banned) return setblock
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# Blanket block
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# returns true if to block
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# Placeholder function - overide in fn.story
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function(checkblanketblock)
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# SSL Blanket block
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# returns true if to block
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# Placeholder function - overide in fn.story
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function(sslcheckblanketblock)
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# ICAP Squid bump
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# override in site.story to return true if bump is being deployed on squid
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function(icapsquidbump)
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# File type blocking
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# returns true if blocking
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# Default uses banned lists and allows all others
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# Overide in site.story or fn.story if only types in exception file type lists
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# are to be allowed
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function(checkfiletype)
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if(mimein, bannedmime) return setblock
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if(extensionin, bannedextension) return setblock
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# SNI checking - determines default action when no SNI or TSL is present on a
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# THTTPS connection
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# Default blocks all requests with TLS or SNI absent that are not ip site exceptions
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function(checksni)
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ifnot(tls,,511) return setblock
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ifnot(hassniset,,512) return setblock
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