RainbowCrack官方使用指南英文

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1、RainbowCrackTutorialIntroductionRainbowCrackisageneralproposeimplementationofPhilippeOechslin'sfastertime-memorytrade-offtechnique.Functionofthissoftwareistocrackhash.Thestraightforwardwaytocrackhashisbruteforce.Inbruteforceapproach,allcandidateplaintextsandcorrespondinghashesarecomputedonebyone.The

2、computedhashesarecomparedwiththetargethash.Ifoneofthemmatches,theplaintextisfound.Otherwisetheprocesscontinuesuntilfinishsearchingallcandidateplaintexts.Intime-memorytradeoffapproach,thetaskofhashcomputingisdoneinadvancewiththeresultsstoredinfilescalled"rainbowtable".Afterthat,hashescanbelookedupfro

3、mtherainbowtableswheneverneeded.Thepre-computationprocessneedsseveraltimestheeffortoffullkeyspacebruteforce.Butoncetheonetimepre-computationiscomplete,thetablelookupperformancecanbehundredsorthousandstimesfasterthanbruteforce.ThisdocumentexplainsthestepstomaketheRainbowCracksoftwareworkingforfirstti

4、meuser.Mostcontentsinthisdocumentareimplementationspecific,whileothersaregenerictotime-memorytradeoffalgorithm.TheRainbowCracksoftwareincludesthreetoolsthatmustbeusedinsequencetomakethingsworking.Step1:Usertgenprogramtogeneraterainbowtables.Step2:Usertsortprogramtosortrainbowtablesgeneratedbyrtgen.S

5、tep3:Usercrackprogramtolookuprainbowtablessortedbyrtsort.Thetablelookupprocessinfinalstepisequivalenttothehashcrackingprocess.Thewaytousetheseprogramswillbeexplainedinthisdocument.Allofthemarecommandlineprograms.Step1:Usertgenprogramtogeneraterainbowtables第6页共6页Thertgenprogramneedseveralparametersto

6、generatearainbowtable,thesyntaxofthecommandlineis:    rtgenhash_algorithmcharsetplaintext_len_minplaintext_len_maxtable_indexchain_lenchain_numpart_indexExplanationoftheseparameters:parametermeaninghash_algorithmThehashalgorithm(lm,ntlm,md5andsoon)usedintherainbowtable.charsetThecharsetofallplaintex

7、tsintherainbowtable.Allpossiblecharsetaredefinedinthecharset.txtfile.plaintext_len_minplaintext_len_maxThesetwoparametersdefinethepossiblelengthofallplaintextsintherainbowtable.Ifcharsetisnumeric,plai