Created
August 22, 2022 08:52
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MIMC7 hash implementation TypeScript
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import bigInt, { BigInteger } from "big-integer"; | |
const c = [ | |
"0", | |
"20888961410941983456478427210666206549300505294776164667214940546594746570981", | |
"15265126113435022738560151911929040668591755459209400716467504685752745317193", | |
"8334177627492981984476504167502758309043212251641796197711684499645635709656", | |
"1374324219480165500871639364801692115397519265181803854177629327624133579404", | |
"11442588683664344394633565859260176446561886575962616332903193988751292992472", | |
"2558901189096558760448896669327086721003508630712968559048179091037845349145", | |
"11189978595292752354820141775598510151189959177917284797737745690127318076389", | |
"3262966573163560839685415914157855077211340576201936620532175028036746741754", | |
"17029914891543225301403832095880481731551830725367286980611178737703889171730", | |
"4614037031668406927330683909387957156531244689520944789503628527855167665518", | |
"19647356996769918391113967168615123299113119185942498194367262335168397100658", | |
"5040699236106090655289931820723926657076483236860546282406111821875672148900", | |
"2632385916954580941368956176626336146806721642583847728103570779270161510514", | |
"17691411851977575435597871505860208507285462834710151833948561098560743654671", | |
"11482807709115676646560379017491661435505951727793345550942389701970904563183", | |
"8360838254132998143349158726141014535383109403565779450210746881879715734773", | |
"12663821244032248511491386323242575231591777785787269938928497649288048289525", | |
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"10035653564014594269791753415727486340557376923045841607746250017541686319774", | |
"3446968588058668564420958894889124905706353937375068998436129414772610003289", | |
"4653317306466493184743870159523234588955994456998076243468148492375236846006", | |
"8486711143589723036499933521576871883500223198263343024003617825616410932026", | |
"250710584458582618659378487568129931785810765264752039738223488321597070280", | |
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"16313562605837709339799839901240652934758303521543693857533755376563489378839", | |
"6032365105133504724925793806318578936233045029919447519826248813478479197288", | |
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"5264534817993325015357427094323255342713527811596856940387954546330728068658", | |
"18884137497114307927425084003812022333609937761793387700010402412840002189451", | |
"5148596049900083984813839872929010525572543381981952060869301611018636120248", | |
"19799686398774806587970184652860783461860993790013219899147141137827718662674", | |
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"10546185249390392695582524554167530669949955276893453512788278945742408153192", | |
"5507959600969845538113649209272736011390582494851145043668969080335346810411", | |
"18177751737739153338153217698774510185696788019377850245260475034576050820091", | |
"19603444733183990109492724100282114612026332366576932662794133334264283907557", | |
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"18718569356736340558616379408444812528964066420519677106145092918482774343613", | |
"10530777752259630125564678480897857853807637120039176813174150229243735996839", | |
"20486583726592018813337145844457018474256372770211860618687961310422228379031", | |
"12690713110714036569415168795200156516217175005650145422920562694422306200486", | |
"17386427286863519095301372413760745749282643730629659997153085139065756667205", | |
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"6309765381643925252238633914530877025934201680691496500372265330505506717193", | |
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"13564695482314888817576351063608519127702411536552857463682060761575100923924", | |
"9262808208636973454201420823766139682381973240743541030659775288508921362724", | |
"173271062536305557219323722062711383294158572562695717740068656098441040230", | |
"18120430890549410286417591505529104700901943324772175772035648111937818237369", | |
"20484495168135072493552514219686101965206843697794133766912991150184337935627", | |
"19155651295705203459475805213866664350848604323501251939850063308319753686505", | |
"11971299749478202793661982361798418342615500543489781306376058267926437157297", | |
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"7069216248902547653615508023941692395371990416048967468982099270925308100727", | |
"6465151453746412132599596984628739550147379072443683076388208843341824127379", | |
"16143532858389170960690347742477978826830511669766530042104134302796355145785", | |
"19362583304414853660976404410208489566967618125972377176980367224623492419647", | |
"1702213613534733786921602839210290505213503664731919006932367875629005980493", | |
"10781825404476535814285389902565833897646945212027592373510689209734812292327", | |
"4212716923652881254737947578600828255798948993302968210248673545442808456151", | |
"7594017890037021425366623750593200398174488805473151513558919864633711506220", | |
"18979889247746272055963929241596362599320706910852082477600815822482192194401", | |
"1360213922981323134938688511315690179366171918090039581890971975815045550053", | |
].map((n) => bigInt(n)); | |
const P = BigInt( | |
"21888242871839275222246405745257275088548364400416034343698204186575808495617" | |
); | |
export default function mimc7( | |
rounds: number, | |
input: BigInteger, | |
key: number | |
): BigInteger { | |
let t = bigInt(0); | |
let t2 = Array.from<BigInteger>({ length: rounds }); | |
let t4 = Array.from<BigInteger>({ length: rounds }); | |
let t6 = Array.from<BigInteger>({ length: rounds }); | |
let t7 = Array.from<BigInteger>({ length: rounds }); | |
for (let i = 0; i < rounds; i++) { | |
let i2 = i == 0 ? 0 : i - 1; | |
t = | |
i == 0 | |
? bigInt(key).plus(input).mod(P) | |
: bigInt(key).plus(t7[i2]).plus(c[i]).mod(P); | |
t2[i] = t.square().mod(P); | |
t4[i] = t2[i].square().mod(P); | |
t6[i] = t4[i].multiply(t2[i]).mod(P); | |
t7[i] = t6[i].multiply(t).mod(P); | |
} | |
return t6[rounds - 1].multiply(t).plus(key).mod(P); | |
} |
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