X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=src%2Fln%2Fchan_utils.rs;h=e7945a508b426351e3633ed900225b566a6b5271;hb=235cf03073e31c743b5f80513e2f31f1e55071aa;hp=7f259d98149a2d362f1df7be3caab15c6ff1aaaa;hpb=4330ae5d4f1fefeb7f211360354fb04eb8480351;p=rust-lightning diff --git a/src/ln/chan_utils.rs b/src/ln/chan_utils.rs index 7f259d98..e7945a50 100644 --- a/src/ln/chan_utils.rs +++ b/src/ln/chan_utils.rs @@ -1,17 +1,19 @@ use bitcoin::blockdata::script::{Script,Builder}; use bitcoin::blockdata::opcodes; use bitcoin::blockdata::transaction::{TxIn,TxOut,OutPoint,Transaction}; -use bitcoin::util::hash::{Hash160,Sha256dHash}; +use bitcoin::util::hash::{Sha256dHash}; + +use bitcoin_hashes::{Hash, HashEngine}; +use bitcoin_hashes::sha256::Hash as Sha256; +use bitcoin_hashes::ripemd160::Hash as Ripemd160; +use bitcoin_hashes::hash160::Hash as Hash160; + +use ln::channelmanager::PaymentHash; use secp256k1::key::{PublicKey,SecretKey}; use secp256k1::Secp256k1; use secp256k1; -use crypto::digest::Digest; -use crypto::ripemd160::Ripemd160; - -use util::sha2::Sha256; - pub const HTLC_SUCCESS_TX_WEIGHT: u64 = 703; pub const HTLC_TIMEOUT_TX_WEIGHT: u64 = 663; @@ -24,35 +26,31 @@ pub fn build_commitment_secret(commitment_seed: [u8; 32], idx: u64) -> [u8; 32] let bitpos = 47 - i; if idx & (1 << bitpos) == (1 << bitpos) { res[bitpos / 8] ^= 1 << (bitpos & 7); - let mut sha = Sha256::new(); - sha.input(&res); - sha.result(&mut res); + res = Sha256::hash(&res).into_inner(); } } res } pub fn derive_private_key(secp_ctx: &Secp256k1, per_commitment_point: &PublicKey, base_secret: &SecretKey) -> Result { - let mut sha = Sha256::new(); + let mut sha = Sha256::engine(); sha.input(&per_commitment_point.serialize()); sha.input(&PublicKey::from_secret_key(&secp_ctx, &base_secret).serialize()); - let mut res = [0; 32]; - sha.result(&mut res); + let res = Sha256::from_engine(sha).into_inner(); let mut key = base_secret.clone(); - key.add_assign(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &res)?)?; + key.add_assign(&res)?; Ok(key) } pub fn derive_public_key(secp_ctx: &Secp256k1, per_commitment_point: &PublicKey, base_point: &PublicKey) -> Result { - let mut sha = Sha256::new(); + let mut sha = Sha256::engine(); sha.input(&per_commitment_point.serialize()); sha.input(&base_point.serialize()); - let mut res = [0; 32]; - sha.result(&mut res); + let res = Sha256::from_engine(sha).into_inner(); - let hashkey = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &res)?); - base_point.combine(&secp_ctx, &hashkey) + let hashkey = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&res)?); + base_point.combine(&hashkey) } /// Derives a revocation key from its constituent parts @@ -61,57 +59,49 @@ pub fn derive_private_revocation_key(secp_ctx: &Secp256k1 let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret); let rev_append_commit_hash_key = { - let mut sha = Sha256::new(); + let mut sha = Sha256::engine(); sha.input(&revocation_base_point.serialize()); sha.input(&per_commitment_point.serialize()); - let mut res = [0; 32]; - sha.result(&mut res); - SecretKey::from_slice(&secp_ctx, &res)? + Sha256::from_engine(sha).into_inner() }; let commit_append_rev_hash_key = { - let mut sha = Sha256::new(); + let mut sha = Sha256::engine(); sha.input(&per_commitment_point.serialize()); sha.input(&revocation_base_point.serialize()); - let mut res = [0; 32]; - sha.result(&mut res); - SecretKey::from_slice(&secp_ctx, &res)? + Sha256::from_engine(sha).into_inner() }; let mut part_a = revocation_base_secret.clone(); - part_a.mul_assign(&secp_ctx, &rev_append_commit_hash_key)?; + part_a.mul_assign(&rev_append_commit_hash_key)?; let mut part_b = per_commitment_secret.clone(); - part_b.mul_assign(&secp_ctx, &commit_append_rev_hash_key)?; - part_a.add_assign(&secp_ctx, &part_b)?; + part_b.mul_assign(&commit_append_rev_hash_key)?; + part_a.add_assign(&part_b[..])?; Ok(part_a) } pub fn derive_public_revocation_key(secp_ctx: &Secp256k1, per_commitment_point: &PublicKey, revocation_base_point: &PublicKey) -> Result { let rev_append_commit_hash_key = { - let mut sha = Sha256::new(); + let mut sha = Sha256::engine(); sha.input(&revocation_base_point.serialize()); sha.input(&per_commitment_point.serialize()); - let mut res = [0; 32]; - sha.result(&mut res); - SecretKey::from_slice(&secp_ctx, &res)? + Sha256::from_engine(sha).into_inner() }; let commit_append_rev_hash_key = { - let mut sha = Sha256::new(); + let mut sha = Sha256::engine(); sha.input(&per_commitment_point.serialize()); sha.input(&revocation_base_point.serialize()); - let mut res = [0; 32]; - sha.result(&mut res); - SecretKey::from_slice(&secp_ctx, &res)? + Sha256::from_engine(sha).into_inner() }; let mut part_a = revocation_base_point.clone(); part_a.mul_assign(&secp_ctx, &rev_append_commit_hash_key)?; let mut part_b = per_commitment_point.clone(); part_b.mul_assign(&secp_ctx, &commit_append_rev_hash_key)?; - part_a.combine(&secp_ctx, &part_b) + part_a.combine(&part_b) } pub struct TxCreationKeys { @@ -139,15 +129,15 @@ impl TxCreationKeys { /// Gets the "to_local" output redeemscript, ie the script which is time-locked or spendable by /// the revocation key pub fn get_revokeable_redeemscript(revocation_key: &PublicKey, to_self_delay: u16, delayed_payment_key: &PublicKey) -> Script { - Builder::new().push_opcode(opcodes::All::OP_IF) + Builder::new().push_opcode(opcodes::all::OP_IF) .push_slice(&revocation_key.serialize()) - .push_opcode(opcodes::All::OP_ELSE) + .push_opcode(opcodes::all::OP_ELSE) .push_int(to_self_delay as i64) .push_opcode(opcodes::OP_CSV) - .push_opcode(opcodes::All::OP_DROP) + .push_opcode(opcodes::all::OP_DROP) .push_slice(&delayed_payment_key.serialize()) - .push_opcode(opcodes::All::OP_ENDIF) - .push_opcode(opcodes::All::OP_CHECKSIG) + .push_opcode(opcodes::all::OP_ENDIF) + .push_opcode(opcodes::all::OP_CHECKSIG) .into_script() } @@ -156,77 +146,71 @@ pub struct HTLCOutputInCommitment { pub offered: bool, pub amount_msat: u64, pub cltv_expiry: u32, - pub payment_hash: [u8; 32], - pub transaction_output_index: u32, + pub payment_hash: PaymentHash, + pub transaction_output_index: Option, } #[inline] pub fn get_htlc_redeemscript_with_explicit_keys(htlc: &HTLCOutputInCommitment, a_htlc_key: &PublicKey, b_htlc_key: &PublicKey, revocation_key: &PublicKey) -> Script { - let payment_hash160 = { - let mut ripemd = Ripemd160::new(); - ripemd.input(&htlc.payment_hash); - let mut res = [0; 20]; - ripemd.result(&mut res); - res - }; + let payment_hash160 = Ripemd160::hash(&htlc.payment_hash.0[..]).into_inner(); if htlc.offered { - Builder::new().push_opcode(opcodes::All::OP_DUP) - .push_opcode(opcodes::All::OP_HASH160) - .push_slice(&Hash160::from_data(&revocation_key.serialize())[..]) - .push_opcode(opcodes::All::OP_EQUAL) - .push_opcode(opcodes::All::OP_IF) - .push_opcode(opcodes::All::OP_CHECKSIG) - .push_opcode(opcodes::All::OP_ELSE) + Builder::new().push_opcode(opcodes::all::OP_DUP) + .push_opcode(opcodes::all::OP_HASH160) + .push_slice(&Hash160::hash(&revocation_key.serialize())[..]) + .push_opcode(opcodes::all::OP_EQUAL) + .push_opcode(opcodes::all::OP_IF) + .push_opcode(opcodes::all::OP_CHECKSIG) + .push_opcode(opcodes::all::OP_ELSE) .push_slice(&b_htlc_key.serialize()[..]) - .push_opcode(opcodes::All::OP_SWAP) - .push_opcode(opcodes::All::OP_SIZE) + .push_opcode(opcodes::all::OP_SWAP) + .push_opcode(opcodes::all::OP_SIZE) .push_int(32) - .push_opcode(opcodes::All::OP_EQUAL) - .push_opcode(opcodes::All::OP_NOTIF) - .push_opcode(opcodes::All::OP_DROP) + .push_opcode(opcodes::all::OP_EQUAL) + .push_opcode(opcodes::all::OP_NOTIF) + .push_opcode(opcodes::all::OP_DROP) .push_int(2) - .push_opcode(opcodes::All::OP_SWAP) + .push_opcode(opcodes::all::OP_SWAP) .push_slice(&a_htlc_key.serialize()[..]) .push_int(2) - .push_opcode(opcodes::All::OP_CHECKMULTISIG) - .push_opcode(opcodes::All::OP_ELSE) - .push_opcode(opcodes::All::OP_HASH160) + .push_opcode(opcodes::all::OP_CHECKMULTISIG) + .push_opcode(opcodes::all::OP_ELSE) + .push_opcode(opcodes::all::OP_HASH160) .push_slice(&payment_hash160) - .push_opcode(opcodes::All::OP_EQUALVERIFY) - .push_opcode(opcodes::All::OP_CHECKSIG) - .push_opcode(opcodes::All::OP_ENDIF) - .push_opcode(opcodes::All::OP_ENDIF) + .push_opcode(opcodes::all::OP_EQUALVERIFY) + .push_opcode(opcodes::all::OP_CHECKSIG) + .push_opcode(opcodes::all::OP_ENDIF) + .push_opcode(opcodes::all::OP_ENDIF) .into_script() } else { - Builder::new().push_opcode(opcodes::All::OP_DUP) - .push_opcode(opcodes::All::OP_HASH160) - .push_slice(&Hash160::from_data(&revocation_key.serialize())[..]) - .push_opcode(opcodes::All::OP_EQUAL) - .push_opcode(opcodes::All::OP_IF) - .push_opcode(opcodes::All::OP_CHECKSIG) - .push_opcode(opcodes::All::OP_ELSE) + Builder::new().push_opcode(opcodes::all::OP_DUP) + .push_opcode(opcodes::all::OP_HASH160) + .push_slice(&Hash160::hash(&revocation_key.serialize())[..]) + .push_opcode(opcodes::all::OP_EQUAL) + .push_opcode(opcodes::all::OP_IF) + .push_opcode(opcodes::all::OP_CHECKSIG) + .push_opcode(opcodes::all::OP_ELSE) .push_slice(&b_htlc_key.serialize()[..]) - .push_opcode(opcodes::All::OP_SWAP) - .push_opcode(opcodes::All::OP_SIZE) + .push_opcode(opcodes::all::OP_SWAP) + .push_opcode(opcodes::all::OP_SIZE) .push_int(32) - .push_opcode(opcodes::All::OP_EQUAL) - .push_opcode(opcodes::All::OP_IF) - .push_opcode(opcodes::All::OP_HASH160) + .push_opcode(opcodes::all::OP_EQUAL) + .push_opcode(opcodes::all::OP_IF) + .push_opcode(opcodes::all::OP_HASH160) .push_slice(&payment_hash160) - .push_opcode(opcodes::All::OP_EQUALVERIFY) + .push_opcode(opcodes::all::OP_EQUALVERIFY) .push_int(2) - .push_opcode(opcodes::All::OP_SWAP) + .push_opcode(opcodes::all::OP_SWAP) .push_slice(&a_htlc_key.serialize()[..]) .push_int(2) - .push_opcode(opcodes::All::OP_CHECKMULTISIG) - .push_opcode(opcodes::All::OP_ELSE) - .push_opcode(opcodes::All::OP_DROP) + .push_opcode(opcodes::all::OP_CHECKMULTISIG) + .push_opcode(opcodes::all::OP_ELSE) + .push_opcode(opcodes::all::OP_DROP) .push_int(htlc.cltv_expiry as i64) .push_opcode(opcodes::OP_CLTV) - .push_opcode(opcodes::All::OP_DROP) - .push_opcode(opcodes::All::OP_CHECKSIG) - .push_opcode(opcodes::All::OP_ENDIF) - .push_opcode(opcodes::All::OP_ENDIF) + .push_opcode(opcodes::all::OP_DROP) + .push_opcode(opcodes::all::OP_CHECKSIG) + .push_opcode(opcodes::all::OP_ENDIF) + .push_opcode(opcodes::all::OP_ENDIF) .into_script() } } @@ -238,12 +222,13 @@ pub fn get_htlc_redeemscript(htlc: &HTLCOutputInCommitment, keys: &TxCreationKey get_htlc_redeemscript_with_explicit_keys(htlc, &keys.a_htlc_key, &keys.b_htlc_key, &keys.revocation_key) } +/// panics if htlc.transaction_output_index.is_none()! pub fn build_htlc_transaction(prev_hash: &Sha256dHash, feerate_per_kw: u64, to_self_delay: u16, htlc: &HTLCOutputInCommitment, a_delayed_payment_key: &PublicKey, revocation_key: &PublicKey) -> Transaction { let mut txins: Vec = Vec::new(); txins.push(TxIn { previous_output: OutPoint { txid: prev_hash.clone(), - vout: htlc.transaction_output_index, + vout: htlc.transaction_output_index.expect("Can't build an HTLC transaction for a dust output"), }, script_sig: Script::new(), sequence: 0,