package bls12-381-hash

  1. Overview
  2. Docs

Source file rescue.ml

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
module Stubs = struct
  type ctxt

  external allocate_ctxt :
    Bls12_381.Fr.t array array -> Bls12_381.Fr.t array -> int -> int -> ctxt
    = "caml_bls12_381_hash_rescue_allocate_ctxt_stubs"

  external apply_permutation : ctxt -> unit
    = "caml_bls12_381_hash_rescue_apply_permutation_stubs"

  external get_state : Bls12_381.Fr.t array -> ctxt -> unit
    = "caml_bls12_381_hash_rescue_get_state_stubs"

  external get_state_size : ctxt -> int
    = "caml_bls12_381_hash_rescue_get_state_size_stubs"

  external set_state : ctxt -> Bls12_381.Fr.t array -> unit
    = "caml_bls12_381_hash_rescue_set_state_stubs"
end

type ctxt = Stubs.ctxt

let allocate_ctxt mds round_constants nb_round state_size =
  if state_size <> 3 then
    failwith "Only suppporting state size of 3 at the moment" ;
  Stubs.allocate_ctxt mds round_constants nb_round state_size

let apply_permutation ctxt = Stubs.apply_permutation ctxt

let set_state ctxt state =
  let exp_state_size = Stubs.get_state_size ctxt in
  let state_size = Array.length state in
  if state_size <> exp_state_size then
    failwith
      (Printf.sprintf
         "The given array contains %d elements but the expected state size is \
          %d"
         state_size
         exp_state_size) ;
  Stubs.set_state ctxt state

let get_state_size ctxt = Stubs.get_state_size ctxt

let get_state ctxt =
  let state_size = Stubs.get_state_size ctxt in
  let state = Array.init state_size (fun _ -> Bls12_381.Fr.(copy zero)) in
  Stubs.get_state state ctxt ;
  state

module Parameters = struct
  let state_size_3_mds =
    [| [| "343";
          "52435875175126190479447740508185965837690552500527637822603658699938581184114";
          "57"
       |];
       [| "19551";
          "52435875175126190479447740508185965837690552500527637822603658699938581162113";
          "2850"
       |];
       [| "977550";
          "52435875175126190479447740508185965837690552500527637822603658699938580066914";
          "140050"
       |]
    |]
    |> Array.map (Array.map Bls12_381.Fr.of_string)

  let state_size_3_round_constants =
    [| "35495817390819093545263349384941809089491580678942832859579453034368810736263";
       "4734865798690304458175502708216292605326887152358688691882538799996069070938";
       "31271008447681288492961289082649653266089021637020407236527451612237705002107";
       "3752272659749554246987316978069954116630957098620898965749354210894049705204";
       "22641555720019163306763445608116202165619173600682976754848212896631953422071";
       "28122533469631806190969995639553619503758826280316271478360761787725211583550";
       "25847917841495375497002109968427099088777388041775300281757084913772616807196";
       "32694606500120353152300866547101238346520817919199364752958292990138213972843";
       "27286327057691837800467727052167328890802672763096896941933952396730026264130";
       "11421505857991327619183254231367489753132565965114463729904675480639756627135";
       "521411871436069789624101480374109564923458769959324381065745329697883697117";
       "23880784307761253829209017376202022699450440759526482483183942457652656506129";
       "32944735989607121897647886317992117157418889561697480633116336030286723761501";
       "23809168654834556097350366212084670162247725165957937623679460641681583816451";
       "3163860194972429483721954648842733164010713297776971497284575674748141326227";
       "4994154821407041837874226315683255286085207059107827489820229821534877668868";
       "50472710115457611398312524300398743989276776324315737822995925423912734574272";
       "251866835357267652745308982111788504159393069098120092619439598668220537943";
       "29306447221479286209562070090539769526225070913770783266162336064629228514551";
       "29283041777181961494713136804131952798141345310627850728919908467956333015832";
       "28656363295645570828788643827370268834132346888229153863515891780361414296486";
       "25038928963239238795570624926346448459425394096652630785926109997438209703232";
       "8137054880809446884023200631931681550641379823710586899296036975467179806266";
       "40023642373942331790709007028495088784452433159634511649021697266107433596568";
       "35762237949937672281308268151392628513069349315494090383109234785560672634670";
       "30999566811631951689259246295471339743428563889981096112711184113782054324157";
       "20279178450660587763205226449293238908131708902882258115414408411285674682667";
       "7251226788353540177691937542431845975737106489341120571030231114808456476646";
       "52125099959305698802726608420202937507908602874086034970293871469588059526157";
       "36947771116325024965590213964896639663487838999452121836698608133540047510904";
       "6731449362796983987468313257604646517406447849071950000589095424962988643919";
       "46799204329731723451752711923834870677752669570495984560450489328024837708708";
       "35089631385082017128756246668734504606091189119241613702809534617529750689438";
       "48404791586561114467519265925614105026432456534013682923179665391057050944501";
       "25910045457085525717925797997640841840596905619632452927132962053945891631463";
       "1002644049329627578859603332717752156946995816186878866098534634466684910592";
       "27000834541453700882360080348023947440783037764820885196153273422481631245741";
       "12589074081116083610034305532223638886927072126291986576471860562392225733147";
       "42427223203410224646468929039478899902048566366856240877703602702087931641888";
       "13041605696900798404650686538893086909353822453068056131548498883864307018762";
       "7724559080250826493557773439911765324995115520951876421071063545832580076523";
       "2608760983816514764568197126437451665283344192910536302819820213681815485600";
       "4325576551800410431474186754039992813847609089390921236861130833620395142916";
       "28244869281227089786402354774575238327642814071062911402571918173773147690382";
       "52254320812514580546932455788288716956214894268551482805284261007871578815161";
       "44449246366481365934850731985584672122835299278127134772360027315881296465188";
       "38769336262079049280674269301353892930067342680672673045972987208159445324024";
       "42379436704506954159182654240696088598260763773619436089417882065405547940000";
       "22632779538473440042293241998410977359589070603696185849507766111228222504955";
       "15890983544445833013318912933113160561188216234423366865567699135890287302776";
       "42613622386509970285531317746282776785466762852259244468998263414951438072346";
       "3349279328650947992104289938299770603841093392045299702204191673899696292828";
       "24960454956681584943062398789550512391287992748093736571644480050215988836698";
       "31771416517485450527236959099354889665790926800645171236881417310335951093156";
       "6723262288337923380317441046361546981088139618189440979848042063784738198448";
       "34890105450847731125549485970715770779411614440863872580331681887247489622411";
       "11578979089604924419672152758230524155578424562011333797269885929442680042317";
       "50413588594256908654341963895371964591208017449187726872226940257366479794931";
       "25342645262500526730472670090219790271213097305995599586909134601382438580057";
       "8823851208157208211075893000112820438603010547555640271936182343488623715695";
       "48715166069588125017688857080421400882110756555551531562607166243928305121118";
       "457928742693316582022794368629361528074764749146022984852066320975235063636";
       "40784591676918140113004512439228960581998583153376036451231191678625605644121";
       "18433242804842005502998987143284711404363511412515282751547329224013759991670";
       "13389179080347763657382998600872902733061029331254291204270991952891409570918";
       "50192764209384080101272306620889875080455867628520281400927714930481563250325";
       "21188812847528225766555643216406799500549004969671500977130541863203997121380";
       "15467310814359095588985846207322319122950649805677111326687390171860927014900";
       "43568129081901200261103456211527409151200730655566657378341556085992472943958";
       "34271132631203889901701300408318058004416254071247236806623005223769350150039";
       "22173004425756666568314241635854763913339665884248599814793658197582222664954";
       "32975563242070450354147568749607182665869459510325615902750312087436132984686";
       "22696762757124796424578806530049133427552572655901519744413916679979764071390";
       "17763704296411643970998432037239004006015355463277677435659459899409343551392";
       "47107020014905029302099526236973268575042805085389783842994685212684421454488";
       "13304672766482627838923613214260444961210749299235217922669168410578113120633";
       "14336471400558675842362782084319960764287611922882892949544609123042059062824";
       "19303757685423427260649409150012846414071844305131989213305575732858057757894";
       "41105909312432760443399922527873622836019389621682258300053074843930035806751";
       "4449965847617470660026263611722341184463318026296894969809166330782012760219";
       "31939993490530073679397065723723444395703645080257573290017499883874398700446";
       "44612014630702294701797504988969181620837907283197659821551486351788471559337";
       "42992712381319065313644044212157260265940162092852802442073735607198967462282";
       "966835047744911231490794763166379188555949592683359886287393788918898119684"
    |]
    |> Array.map Bls12_381.Fr.of_string

  let state_size_3 = (14, 3, state_size_3_mds, state_size_3_round_constants)
end