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| // This file is part of Substrate. | ||
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| // Copyright (C) Parity Technologies (UK) Ltd. | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
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| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| //! *BLS12-377* types and host functions. | ||
| use crate::utils; | ||
| use ark_bls12_377_ext::CurveHooks; | ||
| use ark_ec::{pairing::Pairing, CurveConfig}; | ||
| use sp_runtime_interface::runtime_interface; | ||
| use sp_std::vec::Vec; | ||
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| /// First pairing group definitions. | ||
| pub mod g1 { | ||
| pub use ark_bls12_377_ext::g1::{ | ||
| G1_GENERATOR_X, G1_GENERATOR_Y, TE_GENERATOR_X, TE_GENERATOR_Y, | ||
| }; | ||
| /// Group configuration. | ||
| pub type Config = ark_bls12_377_ext::g1::Config<super::HostHooks>; | ||
| /// Short Weierstrass form point affine representation. | ||
| pub type G1Affine = ark_bls12_377_ext::g1::G1Affine<super::HostHooks>; | ||
| /// Short Weierstrass form point projective representation. | ||
| pub type G1Projective = ark_bls12_377_ext::g1::G1Projective<super::HostHooks>; | ||
| /// Short Weierstrass form point affine representation. | ||
| pub type G1SWAffine = ark_bls12_377_ext::g1::G1SWAffine<super::HostHooks>; | ||
| /// Short Weierstrass form point projective representation. | ||
| pub type G1SWProjective = ark_bls12_377_ext::g1::G1SWProjective<super::HostHooks>; | ||
| /// Twisted Edwards form point affine representation. | ||
| pub type G1TEAffine = ark_bls12_377_ext::g1::G1TEAffine<super::HostHooks>; | ||
| /// Twisted Edwards form point projective representation. | ||
| pub type G1TEProjective = ark_bls12_377_ext::g1::G1TEProjective<super::HostHooks>; | ||
| } | ||
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| /// Second pairing group definitions. | ||
| pub mod g2 { | ||
| pub use ark_bls12_377_ext::g2::{ | ||
| G2_GENERATOR_X, G2_GENERATOR_X_C0, G2_GENERATOR_X_C1, G2_GENERATOR_Y, G2_GENERATOR_Y_C0, | ||
| G2_GENERATOR_Y_C1, | ||
| }; | ||
| /// Group configuration. | ||
| pub type Config = ark_bls12_377_ext::g2::Config<super::HostHooks>; | ||
| /// Short Weierstrass form point affine representation. | ||
| pub type G2Affine = ark_bls12_377_ext::g2::G2Affine<super::HostHooks>; | ||
| /// Short Weierstrass form point projective representation. | ||
| pub type G2Projective = ark_bls12_377_ext::g2::G2Projective<super::HostHooks>; | ||
| } | ||
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| pub use self::{ | ||
| g1::{Config as G1Config, G1Affine, G1Projective}, | ||
| g2::{Config as G2Config, G2Affine, G2Projective}, | ||
| }; | ||
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| /// Curve hooks jumping into [`host_calls`] host functions. | ||
| #[derive(Copy, Clone)] | ||
| pub struct HostHooks; | ||
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| /// Configuration for *BLS12-377* curve. | ||
| pub type Config = ark_bls12_377_ext::Config<HostHooks>; | ||
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| /// *BLS12-377* definition. | ||
| /// | ||
| /// A generic *BLS12* model specialized with *BLS12-377* configuration. | ||
| pub type Bls12_377 = ark_bls12_377_ext::Bls12_377<HostHooks>; | ||
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| impl CurveHooks for HostHooks { | ||
| fn bls12_377_multi_miller_loop( | ||
| g1: impl Iterator<Item = <Bls12_377 as Pairing>::G1Prepared>, | ||
| g2: impl Iterator<Item = <Bls12_377 as Pairing>::G2Prepared>, | ||
| ) -> Result<<Bls12_377 as Pairing>::TargetField, ()> { | ||
| let g1 = utils::encode(g1.collect::<Vec<_>>()); | ||
| let g2 = utils::encode(g2.collect::<Vec<_>>()); | ||
| let res = host_calls::bls12_377_multi_miller_loop(g1, g2).unwrap_or_default(); | ||
| utils::decode(res) | ||
| } | ||
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| fn bls12_377_final_exponentiation( | ||
| target: <Bls12_377 as Pairing>::TargetField, | ||
| ) -> Result<<Bls12_377 as Pairing>::TargetField, ()> { | ||
| let target = utils::encode(target); | ||
| let res = host_calls::bls12_377_final_exponentiation(target).unwrap_or_default(); | ||
| utils::decode(res) | ||
| } | ||
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| fn bls12_377_msm_g1( | ||
| bases: &[G1Affine], | ||
| scalars: &[<G1Config as CurveConfig>::ScalarField], | ||
| ) -> Result<G1Projective, ()> { | ||
| let bases = utils::encode(bases); | ||
| let scalars = utils::encode(scalars); | ||
| let res = host_calls::bls12_377_msm_g1(bases, scalars).unwrap_or_default(); | ||
| utils::decode_proj_sw(res) | ||
| } | ||
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| fn bls12_377_msm_g2( | ||
| bases: &[G2Affine], | ||
| scalars: &[<G2Config as CurveConfig>::ScalarField], | ||
| ) -> Result<G2Projective, ()> { | ||
| let bases = utils::encode(bases); | ||
| let scalars = utils::encode(scalars); | ||
| let res = host_calls::bls12_377_msm_g2(bases, scalars).unwrap_or_default(); | ||
| utils::decode_proj_sw(res) | ||
| } | ||
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| fn bls12_377_mul_projective_g1( | ||
| base: &G1Projective, | ||
| scalar: &[u64], | ||
| ) -> Result<G1Projective, ()> { | ||
| let base = utils::encode_proj_sw(base); | ||
| let scalar = utils::encode(scalar); | ||
| let res = host_calls::bls12_377_mul_projective_g1(base, scalar).unwrap_or_default(); | ||
| utils::decode_proj_sw(res) | ||
| } | ||
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| fn bls12_377_mul_projective_g2( | ||
| base: &G2Projective, | ||
| scalar: &[u64], | ||
| ) -> Result<G2Projective, ()> { | ||
| let base = utils::encode_proj_sw(base); | ||
| let scalar = utils::encode(scalar); | ||
| let res = host_calls::bls12_377_mul_projective_g2(base, scalar).unwrap_or_default(); | ||
| utils::decode_proj_sw(res) | ||
| } | ||
| } | ||
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| /// Interfaces for working with *Arkworks* *BLS12-377* elliptic curve related types | ||
| /// from within the runtime. | ||
| /// | ||
| /// All types are (de-)serialized through the wrapper types from the `ark-scale` trait, | ||
| /// with `ark_scale::{ArkScale, ArkScaleProjective}`. | ||
| /// | ||
| /// `ArkScale`'s `Usage` generic parameter is expected to be set to "not-validated" | ||
| /// and "not-compressed". | ||
| #[runtime_interface] | ||
| pub trait HostCalls { | ||
| /// Pairing multi Miller loop for *BLS12-377*. | ||
| /// | ||
| /// - Receives encoded: | ||
| /// - `a`: `ArkScale<Vec<G1Affine>>`. | ||
| /// - `b`: `ArkScale<Vec<G2Affine>>`. | ||
| /// - Returns encoded: `ArkScale<Bls12_377::TargetField>`. | ||
| fn bls12_377_multi_miller_loop(a: Vec<u8>, b: Vec<u8>) -> Result<Vec<u8>, ()> { | ||
| utils::multi_miller_loop::<ark_bls12_377::Bls12_377>(a, b) | ||
| } | ||
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| /// Pairing final exponentiation for *BLS12-377.* | ||
| /// | ||
| /// - Receives encoded: `ArkScale<Bls12_377::TargetField>`. | ||
| /// - Returns encoded: `ArkScale<Bls12_377::TargetField>`. | ||
| fn bls12_377_final_exponentiation(f: Vec<u8>) -> Result<Vec<u8>, ()> { | ||
| utils::final_exponentiation::<ark_bls12_377::Bls12_377>(f) | ||
| } | ||
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| /// Multi scalar multiplication on *G1* for *BLS12-377*. | ||
| /// | ||
| /// - Receives encoded: | ||
| /// - `bases`: `ArkScale<Vec<G1Affine>>`. | ||
| /// - `scalars`: `ArkScale<Vec<G1Config::ScalarField>>`. | ||
| /// - Returns encoded: `ArkScaleProjective<G1Projective>`. | ||
| fn bls12_377_msm_g1(bases: Vec<u8>, scalars: Vec<u8>) -> Result<Vec<u8>, ()> { | ||
| utils::msm_sw::<ark_bls12_377::g1::Config>(bases, scalars) | ||
| } | ||
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| /// Multi scalar multiplication on *G2* for *BLS12-377*. | ||
| /// | ||
| /// - Receives encoded: | ||
| /// - `bases`: `ArkScale<Vec<G2Affine>>`. | ||
| /// - `scalars`: `ArkScale<Vec<G2Config::ScalarField>>`. | ||
| /// - Returns encoded: `ArkScaleProjective<G2Projective>`. | ||
| fn bls12_377_msm_g2(bases: Vec<u8>, scalars: Vec<u8>) -> Result<Vec<u8>, ()> { | ||
| utils::msm_sw::<ark_bls12_377::g2::Config>(bases, scalars) | ||
| } | ||
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| /// Projective multiplication on *G1* for *BLS12-377*. | ||
| /// | ||
| /// - Receives encoded: | ||
| /// - `base`: `ArkScaleProjective<G1Projective>`. | ||
| /// - `scalar`: `ArkScale<Vec<u64>>`. | ||
| /// - Returns encoded: `ArkScaleProjective<G1Projective>`. | ||
| fn bls12_377_mul_projective_g1(base: Vec<u8>, scalar: Vec<u8>) -> Result<Vec<u8>, ()> { | ||
| utils::mul_projective_sw::<ark_bls12_377::g1::Config>(base, scalar) | ||
| } | ||
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| /// Projective multiplication on *G2* for *BLS12-377*. | ||
| /// | ||
| /// - Receives encoded: | ||
| /// - `base`: `ArkScaleProjective<G2Projective>`. | ||
| /// - `scalar`: `ArkScale<Vec<u64>>`. | ||
| /// - Returns encoded: `ArkScaleProjective<ark_bls12_377::G2Projective>`. | ||
| fn bls12_377_mul_projective_g2(base: Vec<u8>, scalar: Vec<u8>) -> Result<Vec<u8>, ()> { | ||
| utils::mul_projective_sw::<ark_bls12_377::g2::Config>(base, scalar) | ||
| } | ||
| } |
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