sp_application_crypto/
ecdsa.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//! Ecdsa crypto types.
19
20use crate::{KeyTypeId, RuntimePublic};
21
22use alloc::vec::Vec;
23
24pub use sp_core::ecdsa::*;
25use sp_core::proof_of_possession::NonAggregatable;
26
27mod app {
28	crate::app_crypto!(super, sp_core::testing::ECDSA);
29}
30
31pub use app::{
32	Pair as AppPair, ProofOfPossession as AppProofOfPossession, Public as AppPublic,
33	Signature as AppSignature,
34};
35
36impl RuntimePublic for Public {
37	type Signature = Signature;
38	type ProofOfPossession = Signature;
39
40	fn all(key_type: KeyTypeId) -> crate::Vec<Self> {
41		sp_io::crypto::ecdsa_public_keys(key_type)
42	}
43
44	fn generate_pair(key_type: KeyTypeId, seed: Option<Vec<u8>>) -> Self {
45		sp_io::crypto::ecdsa_generate(key_type, seed)
46	}
47
48	fn sign<M: AsRef<[u8]>>(&self, key_type: KeyTypeId, msg: &M) -> Option<Self::Signature> {
49		sp_io::crypto::ecdsa_sign(key_type, self, msg.as_ref())
50	}
51
52	fn verify<M: AsRef<[u8]>>(&self, msg: &M, signature: &Self::Signature) -> bool {
53		// Reject high-S signatures (BIP-62 malleability protection)
54		let sig_bytes: &[u8; 65] = signature.as_ref();
55		if !sp_core::ecdsa::is_signature_normalized(sig_bytes) {
56			return false;
57		}
58		sp_io::crypto::ecdsa_verify(signature, msg.as_ref(), self)
59	}
60
61	fn generate_proof_of_possession(
62		&mut self,
63		key_type: KeyTypeId,
64		owner: &[u8],
65	) -> Option<Self::Signature> {
66		let proof_of_possession_statement = Pair::proof_of_possession_statement(owner);
67		sp_io::crypto::ecdsa_sign(key_type, self, &proof_of_possession_statement)
68	}
69
70	fn verify_proof_of_possession(
71		&self,
72		owner: &[u8],
73		proof_of_possession: &Self::Signature,
74	) -> bool {
75		// Reject high-S signatures (BIP-62 malleability protection)
76		let sig_bytes: &[u8; 65] = proof_of_possession.as_ref();
77		if !sp_core::ecdsa::is_signature_normalized(sig_bytes) {
78			return false;
79		}
80		let proof_of_possession_statement = Pair::proof_of_possession_statement(owner);
81		sp_io::crypto::ecdsa_verify(&proof_of_possession, &proof_of_possession_statement, &self)
82	}
83
84	fn to_raw_vec(&self) -> Vec<u8> {
85		sp_core::crypto::ByteArray::to_raw_vec(self)
86	}
87}
sp_application_crypto/ecdsa.rs

sp_application_crypto/
ecdsa.rs
