sp_application_crypto/
bandersnatch.rs

1// This file is part of Substrate.
2
3// Copyright (C) Parity Technologies (UK) Ltd.
4// SPDX-License-Identifier: Apache-2.0
5
6// Licensed under the Apache License, Version 2.0 (the "License");
7// you may not use this file except in compliance with the License.
8// You may obtain a copy of the License at
9//
10// 	http://www.apache.org/licenses/LICENSE-2.0
11//
12// Unless required by applicable law or agreed to in writing, software
13// distributed under the License is distributed on an "AS IS" BASIS,
14// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15// See the License for the specific language governing permissions and
16// limitations under the License.
17
18//! Bandersnatch VRF application crypto types.
19
20use crate::{KeyTypeId, RuntimePublic};
21use alloc::vec::Vec;
22pub use sp_core::bandersnatch::*;
23
24use sp_core::{
25	crypto::CryptoType,
26	proof_of_possession::{NonAggregatable, ProofOfPossessionVerifier},
27	Pair as TraitPair,
28};
29
30mod app {
31	crate::app_crypto!(super, sp_core::testing::BANDERSNATCH);
32}
33
34#[cfg(feature = "full_crypto")]
35pub use app::Pair as AppPair;
36pub use app::{Public as AppPublic, Signature as AppSignature};
37
38impl RuntimePublic for Public {
39	type Signature = Signature;
40
41	/// Dummy implementation. Returns an empty vector.
42	fn all(_key_type: KeyTypeId) -> Vec<Self> {
43		Vec::new()
44	}
45
46	fn generate_pair(key_type: KeyTypeId, seed: Option<Vec<u8>>) -> Self {
47		sp_io::crypto::bandersnatch_generate(key_type, seed)
48	}
49
50	fn sign<M: AsRef<[u8]>>(&self, key_type: KeyTypeId, msg: &M) -> Option<Self::Signature> {
51		sp_io::crypto::bandersnatch_sign(key_type, self, msg.as_ref())
52	}
53
54	fn verify<M: AsRef<[u8]>>(&self, msg: &M, signature: &Self::Signature) -> bool {
55		let sig = AppSignature::from(*signature);
56		let pub_key = AppPublic::from(*self);
57		<AppPublic as CryptoType>::Pair::verify(&sig, msg.as_ref(), &pub_key)
58	}
59
60	fn generate_proof_of_possession(&mut self, key_type: KeyTypeId) -> Option<Self::Signature> {
61		let proof_of_possession_statement = Pair::proof_of_possession_statement(self);
62		sp_io::crypto::bandersnatch_sign(key_type, self, &proof_of_possession_statement)
63	}
64
65	fn verify_proof_of_possession(&self, proof_of_possession: &Self::Signature) -> bool {
66		let proof_of_possession = AppSignature::from(*proof_of_possession);
67		let pub_key = AppPublic::from(*self);
68		<AppPublic as CryptoType>::Pair::verify_proof_of_possession(&proof_of_possession, &pub_key)
69	}
70
71	fn to_raw_vec(&self) -> Vec<u8> {
72		sp_core::crypto::ByteArray::to_raw_vec(self)
73	}
74}
sp_application_crypto/bandersnatch.rs

sp_application_crypto/
bandersnatch.rs
