Change bases and IV

circuits/mimc.circom

@@ -8,262 +8,97 @@ template MiMC7(nrounds) {
     signal output out;
 
     var c = [
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     ];
 
     var t;

circuits/pedersen.circom

@@ -158,16 +158,16 @@ template Pedersen(n) {
     signal output out[2];
 
     var BASE = [
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-        [12932435660254426850246080929365951045207624124386035886549006330955720993567,15876660444082442781217588393435527739441124986236154572507597829115005542086],
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+        [1487999857809287756929114517587739322941449154962237464737694709326309567994,14017256862867289575056460215526364897734808720610101650676790868051368668003],
+        [14618644331049802168996997831720384953259095788558646464435263343433563860015,13115243279999696210147231297848654998887864576952244320558158620692603342236],
+        [6814338563135591367010655964669793483652536871717891893032616415581401894627,13660303521961041205824633772157003587453809761793065294055279768121314853695],
+        [3571615583211663069428808372184817973703476260057504149923239576077102575715,11981351099832644138306422070127357074117642951423551606012551622164230222506],
+        [18597552580465440374022635246985743886550544261632147935254624835147509493269,6753322320275422086923032033899357299485124665258735666995435957890214041481]
     ]
 
     var nSegments = ((n-1)\200)+1;

circuits/pedersen_old.circom

@@ -11,17 +11,17 @@ template Pedersen(n) {
     component escalarMuls[nexps];
 
     var PBASE = [
-                    [ 6842263847932328569390632736104801120816056295876316310227967232893658007436,
-                     10520112236148895828506510766039255961372323270202387671483666293012156799229],
-                    [ 7512553369533424708326990019377586455744651641787163924108944444109352325495,
-                       242060483180498555826438209654403949979206323274480625257315595534333598496],
-                    [  480315709862415282411588615813248553518720286084247594626493599605932342246,
-                     15016559215090999873142530067666085992648246670781771102893391410239675444873],
-                    [ 8311398801616893527636419786153024398643144699386228070202625261657263599049,
-                     11125962584728296601438821974884453267303385157860713577195820780853779600315],
-                    [ 1924118814882677827825936037840538695314492559747259292440881566152665343441,
-                     17232376423406964731689089286495480735310130852288107159412732879983310795144]
-                ];
+        [10457101036533406547632367118273992217979173478358440826365724437999023779287,19824078218392094440610104313265183977899662750282163392862422243483260492317],
+        [2671756056509184035029146175565761955751135805354291559563293617232983272177,2663205510731142763556352975002641716101654201788071096152948830924149045094],
+        [5802099305472655231388284418920769829666717045250560929368476121199858275951,5980429700218124965372158798884772646841287887664001482443826541541529227896],
+        [7107336197374528537877327281242680114152313102022415488494307685842428166594,2857869773864086953506483169737724679646433914307247183624878062391496185654],
+        [20265828622013100949498132415626198973119240347465898028410217039057588424236,1160461593266035632937973507065134938065359936056410650153315956301179689506],
+        [1487999857809287756929114517587739322941449154962237464737694709326309567994,14017256862867289575056460215526364897734808720610101650676790868051368668003],
+        [14618644331049802168996997831720384953259095788558646464435263343433563860015,13115243279999696210147231297848654998887864576952244320558158620692603342236],
+        [6814338563135591367010655964669793483652536871717891893032616415581401894627,13660303521961041205824633772157003587453809761793065294055279768121314853695],
+        [3571615583211663069428808372184817973703476260057504149923239576077102575715,11981351099832644138306422070127357074117642951423551606012551622164230222506],
+        [18597552580465440374022635246985743886550544261632147935254624835147509493269,6753322320275422086923032033899357299485124665258735666995435957890214041481]
+    ];
 
     var i;
     var j;

circuits/smt/smthash.circom

@@ -11,7 +11,7 @@ template SMTHash1() {
     signal output out;
 
     component h1 = MiMC7(91);   // Constant
-    h1.x_in <== 0;
+    h1.x_in <== 15021630795539610737508582392395901278341266317943626182700664337106830745361;
     h1.k <== 1;
 
     component h2 = MiMC7(91);
@@ -37,7 +37,7 @@ template SMTHash2() {
     signal output out;
 
     component h1 = MiMC7(91);
-    h1.x_in <== 0;
+    h1.x_in <== 15021630795539610737508582392395901278341266317943626182700664337106830745361;
     h1.k <== L;
 
     component h2 = MiMC7(91);

src/mimc7.js

@@ -3,11 +3,20 @@ const bigInt = require("snarkjs").bigInt;
 const Web3 = require("web3");
 const F = bn128.Fr;
 
-const SEED = "iden3_mimc";
-const nRounds = 91;
+const SEED = "mimc";
+const NROUNDS = 91;
 
+exports.getIV = (seed) => {
+    if (typeof seed === "undefined") seed = SEED;
+    const c = Web3.utils.keccak256(seed+"_iv");
+    const cn = bigInt(Web3.utils.toBN(c).toString());
+    const iv = cn.mod(F.q);
+    return iv;
+};
 
 exports.getConstants = (seed, nRounds) => {
+    if (typeof seed === "undefined") seed = SEED;
+    if (typeof nRounds === "undefined") nRounds = NROUNDS;
     const cts = new Array(nRounds);
     let c = Web3.utils.keccak256(SEED);
     for (let i=1; i<nRounds; i++) {
@@ -27,7 +36,7 @@ exports.hash =  (_x_in, _k) =>{
     const x_in = bigInt(_x_in);
     const k = bigInt(_k);
     let r;
-    for (let i=0; i<nRounds; i++) {
+    for (let i=0; i<NROUNDS; i++) {
         const c = cts[i];
         const t = (i==0) ? F.add(x_in, k) : F.add(F.add(r, k), c);
         r = F.exp(t, 7);

src/mimc_print_iv.js

@@ -0,0 +1,3 @@
+const mimc7 = require("./mimc7.js");
+
+console.log("IV: "+mimc7.getIV().toString());

src/mimc_printconstants..js

@@ -0,0 +1,13 @@
+const mimc7 = require("./mimc7.js");
+
+const nRounds = 91;
+let S = "[\n";
+const cts = mimc7.getConstants();
+for (let i=0; i<nRounds; i++) {
+    S = S + cts[i].toString();
+    if (i<nRounds-1) S = S + ",";
+    S=S+"\n";
+}
+S = S + "]\n";
+
+console.log(S);

src/mimc_printcontract.js

@@ -1,6 +1,6 @@
 const mimcGenContract = require("./mimc_gencontract");
 
-const SEED = "iden3_mimc";
+const SEED = "mimc";
 
 let nRounds;
 if (typeof process.argv[2] != "undefined") {
@@ -10,3 +10,4 @@ if (typeof process.argv[2] != "undefined") {
 }
 
 console.log(mimcGenContract.createCode(SEED, nRounds));
+

src/pedersenHash.js

@@ -4,7 +4,7 @@ const babyJub = require("./babyjub");
 const assert = require("assert");
 const createBlakeHash = require("blake-hash");
 
-const GENPOINT_PREFIX = "Iden3_PedersenGenerator";
+const GENPOINT_PREFIX = "PedersenGenerator";
 const windowSize = 4;
 const nWindowsPerSegment = 50;
 

src/smt.js

@@ -1,12 +1,12 @@
 const bigInt = require("snarkjs").bigInt;
 
 const SMTMemDB = require("./smt_memdb");
-const mimc7 = require("./mimc7").hash;
+const mimc7 = require("./mimc7");
 
 function smtHash(arr) {
-    let r = bigInt(0);
+    let r = mimc7.getIV();
     for (let i=0; i<arr.length; i++) {
-        r = mimc7(r, bigInt(arr[i]));
+        r = mimc7.hash(r, bigInt(arr[i]));
     }
     return r;
 }

test/mimccontract.js

@@ -8,7 +8,7 @@ const mimcjs = require("../src/mimc7.js");
 const assert = chai.assert;
 const log = (msg) => { if (process.env.MOCHA_VERBOSE) console.log(msg); };
 
-const SEED = "iden3_mimc";
+const SEED = "mimc";
 
 describe("MiMC Smart contract test", () => {
     let testrpc;

test/pedersen.js

@@ -11,16 +11,11 @@ const babyJub = require("../src/babyjub.js");
 
 const PBASE =
     [
-        [   bigInt( "6842263847932328569390632736104801120816056295876316310227967232893658007436"),
-            bigInt("10520112236148895828506510766039255961372323270202387671483666293012156799229")],
-        [   bigInt( "7512553369533424708326990019377586455744651641787163924108944444109352325495"),
-            bigInt(  "242060483180498555826438209654403949979206323274480625257315595534333598496")],
-        [   bigInt(  "480315709862415282411588615813248553518720286084247594626493599605932342246"),
-            bigInt("15016559215090999873142530067666085992648246670781771102893391410239675444873")],
-        [   bigInt( "8311398801616893527636419786153024398643144699386228070202625261657263599049"),
-            bigInt("11125962584728296601438821974884453267303385157860713577195820780853779600315")],
-        [   bigInt( "1924118814882677827825936037840538695314492559747259292440881566152665343441"),
-            bigInt("17232376423406964731689089286495480735310130852288107159412732879983310795144")]
+        [bigInt("10457101036533406547632367118273992217979173478358440826365724437999023779287"),bigInt("19824078218392094440610104313265183977899662750282163392862422243483260492317")],
+        [bigInt("2671756056509184035029146175565761955751135805354291559563293617232983272177"),bigInt("2663205510731142763556352975002641716101654201788071096152948830924149045094")],
+        [bigInt("5802099305472655231388284418920769829666717045250560929368476121199858275951"),bigInt("5980429700218124965372158798884772646841287887664001482443826541541529227896")],
+        [bigInt("7107336197374528537877327281242680114152313102022415488494307685842428166594"),bigInt("2857869773864086953506483169737724679646433914307247183624878062391496185654")],
+        [bigInt("20265828622013100949498132415626198973119240347465898028410217039057588424236"),bigInt("1160461593266035632937973507065134938065359936056410650153315956301179689506")]
     ];
 
 describe("Double Pedersen test", function() {