48 lines
1.6 KiB
Rust
48 lines
1.6 KiB
Rust
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extern crate bitcoin_hashes;
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extern crate secp256k1;
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use bitcoin_hashes::{sha256, Hash};
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use secp256k1::recovery::{RecoverableSignature, RecoveryId};
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use secp256k1::{Error, Message, PublicKey, Secp256k1, SecretKey, Signing, Verification};
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fn recover<C: Verification>(secp: &Secp256k1<C>,msg: &[u8],sig: [u8; 64],recovery_id: u8) -> Result<PublicKey, Error> {
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let msg = sha256::Hash::hash(msg);
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let msg = Message::from_slice(&msg)?;
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let id = RecoveryId::from_i32(recovery_id as i32)?;
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let sig = RecoverableSignature::from_compact(&sig, id)?;
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secp.recover(&msg, &sig)
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}
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fn sign_recovery<C: Signing>(secp: &Secp256k1<C>, msg: &[u8], seckey: [u8; 32]) -> Result<RecoverableSignature, Error> {
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let msg = sha256::Hash::hash(msg);
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let msg = Message::from_slice(&msg)?;
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let seckey = SecretKey::from_slice(&seckey)?;
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Ok(secp.sign_recoverable(&msg, &seckey))
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}
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fn main() {
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let secp = Secp256k1::new();
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let seckey = [
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59, 148, 11, 85, 134, 130, 61, 253, 2, 174, 59, 70, 27, 180, 51, 107,
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94, 203, 174, 253, 102, 39, 170, 146, 46, 252, 4, 143, 236, 12, 136, 28,
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];
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let pubkey = PublicKey::from_slice(&[
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2,
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29, 21, 35, 7, 198, 183, 43, 14, 208, 65, 139, 14, 112, 205, 128, 231,
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245, 41, 91, 141, 134, 245, 114, 45, 63, 82, 19, 251, 210, 57, 79, 54,
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]).unwrap();
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let msg = b"This is some message";
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let signature = sign_recovery(&secp, msg, seckey).unwrap();
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let (recovery_id, serialize_sig) = signature.serialize_compact();
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assert_eq!(
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recover(&secp, msg, serialize_sig, recovery_id.to_i32() as u8),
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Ok(pubkey)
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);
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}
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