feat(deobf): do not deobfuscate known top level domains with 2 or 3 characters (PR #1369)

jadx-core/src/main/java/jadx/core/deobf/Deobfuscator.java

@@ -581,6 +581,7 @@ public class Deobfuscator {
 		if (!pkg.hasAlias()) {
 			String pkgName = pkg.getName();
 			if ((args.isDeobfuscationOn() && shouldRename(pkgName))
+					&& (pkg.getParentPackage() != rootPackage || !TldHelper.contains(pkgName)) // check if first level is a valid tld
 					|| (args.isRenameValid() && !NameMapper.isValidIdentifier(pkgName))
 					|| (args.isRenamePrintable() && !NameMapper.isAllCharsPrintable(pkgName))) {
 				String pkgAlias = String.format("p%03d%s", pkgIndex++, prepareNamePart(pkg.getName()));

jadx-core/src/main/java/jadx/core/deobf/TldHelper.java

+package jadx.core.deobf;
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.util.HashSet;
+import java.util.Set;
+
+import jadx.core.utils.exceptions.JadxRuntimeException;
+
+/**
+ * Provides a list of all top level domains with 3 characters and less,
+ * so we can exclude them from deobfuscation.
+ */
+public class TldHelper {
+
+	private static final Set<String> TLD_SET = loadTldFile();
+
+	private static Set<String> loadTldFile() {
+		Set<String> tldNames = new HashSet<>();
+		try (BufferedReader reader = new BufferedReader(new InputStreamReader(Deobfuscator.class.getResourceAsStream("tld_3.txt")))) {
+			String line;
+			while ((line = reader.readLine()) != null) {
+				line = line.trim();
+				if (!line.startsWith("#") && !line.isEmpty()) {
+					tldNames.add(line);
+				}
+			}
+			return tldNames;
+		} catch (Exception e) {
+			throw new JadxRuntimeException("Failed to load top level domain list tld_3.txt", e);
+		}
+	}
+
+	public static boolean contains(String name) {
+		return TLD_SET.contains(name);
+	}
+
+}

jadx-core/src/main/resources/jadx/core/deobf/tld_3.txt

+# All tld domains with 3 or less characters
+# Created from https://data.iana.org/TLD/tlds-alpha-by-domain.txt version 2022020500
+aaa
+abb
+abc
+ac
+aco
+ad
+ads
+ae
+aeg
+af
+afl
+ag
+ai
+aig
+al
+am
+anz
+ao
+aol
+app
+aq
+ar
+art
+as
+at
+au
+aw
+aws
+ax
+axa
+az
+ba
+bar
+bb
+bbc
+bbt
+bcg
+bcn
+bd
+be
+bet
+bf
+bg
+bh
+bi
+bid
+bio
+biz
+bj
+bm
+bms
+bmw
+bn
+bo
+bom
+boo
+bot
+box
+br
+bs
+bt
+buy
+bv
+bw
+by
+bz
+bzh
+ca
+cab
+cal
+cam
+car
+cat
+cba
+cbn
+cbs
+cc
+cd
+ceo
+cf
+cfa
+cfd
+cg
+ch
+ci
+ck
+cl
+cm
+cn
+co
+com
+cpa
+cr
+crs
+cu
+cv
+cw
+cx
+cy
+cz
+dad
+day
+dds
+de
+dev
+dhl
+diy
+dj
+dk
+dm
+dnp
+do
+dog
+dot
+dtv
+dvr
+dz
+eat
+ec
+eco
+edu
+ee
+eg
+er
+es
+esq
+et
+eu
+eus
+fan
+fi
+fit
+fj
+fk
+fly
+fm
+fo
+foo
+fox
+fr
+frl
+ftr
+fun
+fyi
+ga
+gal
+gap
+gay
+gb
+gd
+gdn
+ge
+gea
+gf
+gg
+gh
+gi
+gl
+gle
+gm
+gmo
+gmx
+gn
+goo
+gop
+got
+gov
+gp
+gq
+gr
+gs
+gt
+gu
+gw
+gy
+hbo
+hiv
+hk
+hkt
+hm
+hn
+hot
+how
+hr
+ht
+hu
+ibm
+ice
+icu
+id
+ie
+ifm
+il
+im
+in
+inc
+ing
+ink
+int
+io
+iq
+ir
+is
+ist
+it
+itv
+jcb
+je
+jio
+jll
+jm
+jmp
+jnj
+jo
+jot
+joy
+jp
+ke
+kfh
+kg
+kh
+ki
+kia
+kim
+km
+kn
+kp
+kpn
+kr
+krd
+kw
+ky
+kz
+la
+lat
+law
+lb
+lc
+lds
+li
+lk
+llc
+llp
+lol
+lpl
+lr
+ls
+lt
+ltd
+lu
+lv
+ly
+ma
+man
+map
+mba
+mc
+md
+me
+med
+men
+mg
+mh
+mil
+mit
+mk
+ml
+mlb
+mls
+mm
+mma
+mn
+mo
+moe
+moi
+mom
+mov
+mp
+mq
+mr
+ms
+msd
+mt
+mtn
+mtr
+mu
+mv
+mw
+mx
+my
+mz
+na
+nab
+nba
+nc
+ne
+nec
+net
+new
+nf
+nfl
+ng
+ngo
+nhk
+ni
+nl
+no
+now
+np
+nr
+nra
+nrw
+ntt
+nu
+nyc
+nz
+obi
+om
+one
+ong
+onl
+ooo
+org
+ott
+ovh
+pa
+pay
+pe
+pet
+pf
+pg
+ph
+phd
+pid
+pin
+pk
+pl
+pm
+pn
+pnc
+pr
+pro
+pru
+ps
+pt
+pub
+pw
+pwc
+py
+qa
+re
+red
+ren
+ril
+rio
+rip
+ro
+rs
+ru
+run
+rw
+rwe
+sa
+sap
+sas
+sb
+sbi
+sbs
+sc
+sca
+scb
+sd
+se
+ses
+sew
+sex
+sfr
+sg
+sh
+si
+sj
+sk
+ski
+sky
+sl
+sm
+sn
+so
+soy
+spa
+sr
+srl
+ss
+st
+stc
+su
+sv
+sx
+sy
+sz
+tab
+tax
+tc
+tci
+td
+tdk
+tel
+tf
+tg
+th
+thd
+tj
+tjx
+tk
+tl
+tm
+tn
+to
+top
+tr
+trv
+tt
+tui
+tv
+tvs
+tw
+tz
+ua
+ubs
+ug
+uk
+uno
+uol
+ups
+us
+uy
+uz
+va
+vc
+ve
+vet
+vg
+vi
+vig
+vin
+vip
+vn
+vu
+wed
+wf
+win
+wme
+wow
+ws
+wtc
+wtf
+xin
+xxx
+xyz
+ye
+you
+yt
+yun
+za
+zip
+zm
+zw