Java反编译反混淆编程实例分析

支持对已混淆的jar包进行反混淆

java -jar cfr-0.152.jar --help

CFR 0.152

   --aexagg                         (boolean)
   --aexagg2                        (boolean)
   --aggressivedocopy               (int >= 0)  default: 0
   --aggressivedoextension          (boolean)
   --aggressiveduff                 (boolean)
   --aggressivesizethreshold        (int >= 0)  default: 13000
   --allowcorrecting                (boolean)  default: true
   --allowmalformedswitch           (boolean)
   --analyseas                      (One of [DETECT, JAR, WAR, CLASS])
   --antiobf                        (boolean)  default: false
   --arrayiter                      (boolean)  default: true if class file from version 49.0 (Java 5) or greater
   --caseinsensitivefs              (boolean)  default: true
   --clobber                        (boolean)
   --collectioniter                 (boolean)  default: true if class file from version 49.0 (Java 5) or greater
   --commentmonitors                (boolean)  default: false
   --comments                       (boolean)  default: true
   --constobf                       (boolean)  default: Value of option 'antiobf'
   --decodeenumswitch               (boolean)  default: true if class file from version 49.0 (Java 5) or greater
   --decodefinally                  (boolean)  default: true
   --decodelambdas                  (boolean)  default: true if class file from version 52.0 (Java 8) or greater
   --decodestringswitch             (boolean)  default: true if class file from version 51.0 (Java 7) or greater
   --dumpclasspath                  (boolean)  default: false
   --eclipse                        (boolean)  default: true
   --elidescala                     (boolean)  default: false
   --extraclasspath                 (string)
   --forbidanonymousclasses         (boolean)  default: false
   --forbidmethodscopedclasses      (boolean)  default: false
   --forceclassfilever              (string, specifying either java version as 'j6', 'j1.0', or classfile as '56', '56.65535')
   --forcecondpropagate             (boolean)
   --forceexceptionprune            (boolean)
   --forcereturningifs              (boolean)
   --forcetopsort                   (boolean)
   --forcetopsortaggress            (boolean)
   --forcetopsortnopull             (boolean)
   --forloopaggcapture              (boolean)
   --hidebridgemethods              (boolean)  default: Value of option 'obfattr'
   --hidelangimports                (boolean)  default: true
   --hidelongstrings                (boolean)  default: false
   --hideutf                        (boolean)  default: true
   --ignoreexceptions               (boolean)  default: false
   --ignoreexceptionsalways         (boolean)  default: false
   --importfilter                   (string)
   --innerclasses                   (boolean)  default: true
   --instanceofpattern              (boolean)  default: true if class file from version 60.0 (Java 16) or greater, or experimental in 58.0 (Java 14), 59.0 (Java 15)
   --j14classobj                    (boolean)  default: false if class file from version 49.0 (Java 5) or greater
   --jarfilter                      (string)
   --labelledblocks                 (boolean)  default: true
   --lenient                        (boolean)  default: false
   --liftconstructorinit            (boolean)  default: true
   --lomem                          (boolean)  default: false
   --methodname                     (string)
   --obfattr                        (boolean)  default: Value of option 'antiobf'
   --obfcontrol                     (boolean)  default: Value of option 'antiobf'
   --obfuscationpath                (string)
   --outputdir                      (string)
   --outputencoding                 (string)
   --outputpath                     (string)
   --override                       (boolean)  default: true if class file from version 50.0 (Java 6) or greater
   --previewfeatures                (boolean)  default: true
   --pullcodecase                   (boolean)  default: false
   --recordtypes                    (boolean)  default: true if class file from version 60.0 (Java 16) or greater, or experimental in 58.0 (Java 14), 59.0 (Java 15)
   --recover                        (boolean)  default: true
   --recovertypeclash               (boolean)
   --recovertypehints               (boolean)
   --reducecondscope                (boolean)
   --relinkconst                    (boolean)  default: true
   --relinkconststring              (boolean)  default: Value of option 'relinkconst'
   --removebadgenerics              (boolean)  default: true
   --removeboilerplate              (boolean)  default: true
   --removedeadconditionals         (boolean)
   --removedeadmethods              (boolean)  default: true
   --removeinnerclasssynthetics     (boolean)  default: true
   --rename                         (boolean)  default: false
   --renamedupmembers               (boolean)  default: Value of option 'rename'
   --renameenumidents               (boolean)  default: Value of option 'rename'
   --renameillegalidents            (boolean)  default: Value of option 'rename'
   --renamesmallmembers             (int >= 0)  default: 0
   --sealed                         (boolean)  default: true if class file from version 62.0 (Java 18) or greater, or experimental in 60.0 (Java 16), 61.0 (Java 17)
   --showinferrable                 (boolean)  default: false if class file from version 51.0 (Java 7) or greater
   --showversion                    (boolean)  default: true
   --silent                         (boolean)  default: false
   --skipbatchinnerclasses          (boolean)  default: true
   --staticinitreturn               (boolean)  default: true
   --stringbuffer                   (boolean)  default: false if class file from version 49.0 (Java 5) or greater
   --stringbuilder                  (boolean)  default: true if class file from version 49.0 (Java 5) or greater
   --stringconcat                   (boolean)  default: true if class file from version 53.0 (Java 9) or greater
   --sugarasserts                   (boolean)  default: true
   --sugarboxing                    (boolean)  default: true
   --sugarenums                     (boolean)  default: true if class file from version 49.0 (Java 5) or greater
   --sugarretrolambda               (boolean)  default: false
   --switchexpression               (boolean)  default: true if class file from version 58.0 (Java 14) or greater, or experimental in 56.0 (Java 12), 57.0 (Java 13)
   --tidymonitors                   (boolean)  default: true
   --trackbytecodeloc               (boolean)  default: false
   --tryresources                   (boolean)  default: true if class file from version 51.0 (Java 7) or greater
   --usenametable                   (boolean)  default: true
   --usesignatures                  (boolean)  default: true
   --version                        (boolean)  default: true
   --help                           (string)

   Please specify '--help optionname' for specifics, e.g.
   --help pullcodecase

  (1).控制台输出(没有反混淆)

java -jar cfr-1.5.jar ~/lib/demo.1.0.jar

  (2).重定向到文件(没有反混淆)

java -jar cfr-1.5.jar ~/lib/demo.1.0.jar >> dec.txt

  (3).反混淆，需要添加参数

--renamedupmembers true

java -jar cfr-1.5.jar ~/lib/demo.1.0.jar --renamedupmembers true >> dec.txt

    (4).反编译的结果中，所有的中文都被转为unicode，可以增加参数解决

--hideutf false

 java -jar cfr-1.5.jar ~/lib/demo.1.0.jar --renamedupmembers true --hideutf false >> dec.txt
   java -jar threadtear-gui-3.0.1-all.jar

 

 

编辑：黄飞