52 lines
1.6 KiB
Rust
52 lines
1.6 KiB
Rust
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::{ecdsa, Error, Message, PublicKey, Secp256k1, SecretKey, Signing, Verification};
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fn recover<C: Verification>(
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secp: &Secp256k1<C>,
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msg: &[u8],
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sig: [u8; 64],
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recovery_id: u8,
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) -> Result<PublicKey, Error> {
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let msg = sha256::Hash::hash(msg);
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let msg = Message::from_digest_slice(msg.as_ref())?;
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let id = ecdsa::RecoveryId::from_i32(recovery_id as i32)?;
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let sig = ecdsa::RecoverableSignature::from_compact(&sig, id)?;
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secp.recover_ecdsa(&msg, &sig)
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}
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fn sign_recovery<C: Signing>(
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secp: &Secp256k1<C>,
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msg: &[u8],
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seckey: [u8; 32],
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) -> Result<ecdsa::RecoverableSignature, Error> {
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let msg = sha256::Hash::hash(msg);
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let msg = Message::from_digest_slice(msg.as_ref())?;
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let seckey = SecretKey::from_slice(&seckey)?;
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Ok(secp.sign_ecdsa_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, 94, 203, 174, 253,
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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, 29, 21, 35, 7, 198, 183, 43, 14, 208, 65, 139, 14, 112, 205, 128, 231, 245, 41, 91, 141,
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134, 245, 114, 45, 63, 82, 19, 251, 210, 57, 79, 54,
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])
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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!(recover(&secp, msg, serialize_sig, recovery_id.to_i32() as u8), Ok(pubkey));
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}
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