ark-curves-cherry-picked/mnt6_753/src/curves/g2.rs
mnt6_753/src/curves/g2.rsRaw
1use ark_ec::{
2 mnt6,
3 mnt6::MNT6Parameters,
4 models::{ModelParameters, SWModelParameters},
5};
6use ark_ff::field_new;
7
8use crate::{g1, Fq, Fq3, Fr, FQ_ZERO};
9
10pub type G2Affine = mnt6::G2Affine<crate::Parameters>;
11pub type G2Projective = mnt6::G2Projective<crate::Parameters>;
12pub type G2Prepared = mnt6::G2Prepared<crate::Parameters>;
13
14#[derive(Clone, Default, PartialEq, Eq)]
15pub struct Parameters;
16
17impl ModelParameters for Parameters {
18 type BaseField = Fq3;
19 type ScalarField = Fr;
20}
21
22/// MUL_BY_A_C0 = NONRESIDUE * COEFF_A
23/// = 11 * 11
24/// = 121
25#[rustfmt::skip]
26pub const MUL_BY_A_C0: Fq = field_new!(Fq, "121");
27
28/// MUL_BY_A_C1 = NONRESIDUE * COEFF_A
29/// = 11 * 11
30/// = 121
31#[rustfmt::skip]
32pub const MUL_BY_A_C1: Fq = field_new!(Fq, "121");
33
34/// MUL_BY_A_C2 = COEFF_A
35pub const MUL_BY_A_C2: Fq = g1::Parameters::COEFF_A;
36
37impl SWModelParameters for Parameters {
38 const COEFF_A: Fq3 = crate::Parameters::TWIST_COEFF_A;
39 // B coefficient of MNT6-753 G2 =
40 // ```
41 // mnt6753_twist_coeff_b = mnt6753_Fq3(mnt6753_G1::coeff_b * mnt6753_Fq3::non_residue,
42 // mnt6753_Fq::zero(), mnt6753_Fq::zero());
43 // non_residue = mnt6753_Fq3::non_residue = mnt6753_Fq("11");
44 // = (G1_B_COEFF * NON_RESIDUE, ZERO, ZERO);
45 // =
46 // (2189526091197672465268098090392210500740714959757583916377481826443393499947557697773546040576162515434508768057245887856591913752342600919117433675080691499697020523783784738694360040853591723916201150207746019687604267190251,
47 // 0, 0)
48 // ```
49 #[rustfmt::skip]
50 const COEFF_B: Fq3 = field_new!(
51 Fq3,
52 field_new!(Fq, "2189526091197672465268098090392210500740714959757583916377481826443393499947557697773546040576162515434508768057245887856591913752342600919117433675080691499697020523783784738694360040853591723916201150207746019687604267190251"),
53 FQ_ZERO,
54 FQ_ZERO,
55 );
56
57 /// COFACTOR =
58 /// 1755483545388786116744270475466687259186947712032004459714210070280389500116987496124098574823389466285978151140155508638765729019174599527183600372094760023144398285325863550664578643924584541949466179502227232245309952839189635010671372908411609248348904807785904229403747495114436660255866932060472369629692502198423138429922875792635236729929780298333055698257230963645509826963717287902205842627121011526048163097042046361575549171961352924692480000
59 #[rustfmt::skip]
60 const COFACTOR: &'static [u64] = &[
61 17839255819456086016,
62 500623104730997740,
63 2110252009236161768,
64 1500878543414750896,
65 12839751506594314239,
66 8978537329634833065,
67 13830010955957826199,
68 7626514311663165506,
69 14876243211944528805,
70 2316601947950921451,
71 2601177562497904269,
72 18300670698693155036,
73 17321427554953155530,
74 12586270719596716948,
75 807965545138267130,
76 13086323046094411844,
77 16597411233431396880,
78 5578519820383338987,
79 16478065054289650824,
80 12110148809888520863,
81 5901144846689643164,
82 3407195776166256068,
83 14663852814447346059,
84 13435169368,
85 ];
86
87 /// COFACTOR^(-1) mod r =
88 /// 6983081827986492233724035798540106188028451653325658178630583820170892135428517795509815627298389820236345161981341515817589065927929152555581161598204976128690232061758269440757592419606754539638220064054062394397574161203200
89 #[rustfmt::skip]
90 const COFACTOR_INV: Fr = field_new!(Fr, "6983081827986492233724035798540106188028451653325658178630583820170892135428517795509815627298389820236345161981341515817589065927929152555581161598204976128690232061758269440757592419606754539638220064054062394397574161203200");
91
92 /// AFFINE_GENERATOR_COEFFS = (G2_GENERATOR_X, G2_GENERATOR_Y)
93 const AFFINE_GENERATOR_COEFFS: (Self::BaseField, Self::BaseField) =
94 (G2_GENERATOR_X, G2_GENERATOR_Y);
95
96 #[inline(always)]
97 fn mul_by_a(elt: &Fq3) -> Fq3 {
98 field_new!(
99 Fq3,
100 MUL_BY_A_C0 * &elt.c1,
101 MUL_BY_A_C1 * &elt.c2,
102 MUL_BY_A_C2 * &elt.c0,
103 )
104 }
105}
106
107const G2_GENERATOR_X: Fq3 =
108 field_new!(Fq3, G2_GENERATOR_X_C0, G2_GENERATOR_X_C1, G2_GENERATOR_X_C2);
109const G2_GENERATOR_Y: Fq3 =
110 field_new!(Fq3, G2_GENERATOR_Y_C0, G2_GENERATOR_Y_C1, G2_GENERATOR_Y_C2);
111
112// Generator of G2
113// These are three Fq elements each because X and Y (and Z) are elements of Fq^3
114// X = 27250797394340459586637772414334383652934225310678303542554641987990991970766156209996739240400887081904395745019996048910447071686918567661896491214767494514394154061111870331668445455228882471000120574964265209669155206168252,
115// 35762481056967998715733586393399457882827322353696313323665483142561285210083843314423554450886956650265947502285422529615273790981238406393402603210224104850580302463396274854098657541573494421834514772635884262388058080180368,
116// 36955296703808958167583270646821654948157955258947892285629161090141878438357164213613114995903637211606408001037026832604054121847388692538440756596264746452765613740820430501353237866984394057660379098674983614861254438847846,
117// Y = 2540920530670785421282147216459500299597350984927286541981768941513322907384197363939300669100157141915897390694710534916701460991329498878429407641200901974650893207493883271892985923686300670742888673128384350189165542294615,
118// 7768974215205248225654340523113146529854477025417883273460270519532499370133542215655437897583245920162220909271982265882784840026754554720358946490360213245668334549692889019612343620295335698052097726325099648573158597797497,
119// 21014872727619291834131369222699267167761185012487859171850226473555446863681002782100371394603357586906967186931035615146288030444598977758226767063525819170917389755555854704165900869058188909090444447822088242504281789869689,
120pub const G2_GENERATOR_X_C0: Fq = field_new!(Fq, "27250797394340459586637772414334383652934225310678303542554641987990991970766156209996739240400887081904395745019996048910447071686918567661896491214767494514394154061111870331668445455228882471000120574964265209669155206168252");
121pub const G2_GENERATOR_X_C1: Fq = field_new!(Fq, "35762481056967998715733586393399457882827322353696313323665483142561285210083843314423554450886956650265947502285422529615273790981238406393402603210224104850580302463396274854098657541573494421834514772635884262388058080180368");
122pub const G2_GENERATOR_X_C2: Fq = field_new!(Fq, "36955296703808958167583270646821654948157955258947892285629161090141878438357164213613114995903637211606408001037026832604054121847388692538440756596264746452765613740820430501353237866984394057660379098674983614861254438847846");
123
124pub const G2_GENERATOR_Y_C0: Fq = field_new!(Fq, "2540920530670785421282147216459500299597350984927286541981768941513322907384197363939300669100157141915897390694710534916701460991329498878429407641200901974650893207493883271892985923686300670742888673128384350189165542294615");
125pub const G2_GENERATOR_Y_C1: Fq = field_new!(Fq, "7768974215205248225654340523113146529854477025417883273460270519532499370133542215655437897583245920162220909271982265882784840026754554720358946490360213245668334549692889019612343620295335698052097726325099648573158597797497");
126pub const G2_GENERATOR_Y_C2: Fq = field_new!(Fq, "21014872727619291834131369222699267167761185012487859171850226473555446863681002782100371394603357586906967186931035615146288030444598977758226767063525819170917389755555854704165900869058188909090444447822088242504281789869689");