From 24e2234be53bc8ca3e325002790b9f3f8115f7a8 Mon Sep 17 00:00:00 2001 From: Matt Corallo Date: Wed, 21 Feb 2018 11:09:22 -0500 Subject: [PATCH] Split out channel_monitor_claim_key from shutdown key for privacy --- src/ln/channel.rs | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/src/ln/channel.rs b/src/ln/channel.rs index 054eed0d..285cdf7b 100644 --- a/src/ln/channel.rs +++ b/src/ln/channel.rs @@ -39,6 +39,7 @@ pub struct ChannelKeys { pub delayed_payment_base_key: SecretKey, pub htlc_base_key: SecretKey, pub channel_close_key: SecretKey, + pub channel_monitor_claim_key: SecretKey, pub commitment_seed: [u8; 32], } @@ -68,6 +69,9 @@ impl ChannelKeys { hkdf_expand(sha, &prk, b"rust-lightning channel close key info", &mut okm); let channel_close_key = try!(SecretKey::from_slice(&secp_ctx, &okm)); + hkdf_expand(sha, &prk, b"rust-lightning channel monitor claim key info", &mut okm); + let channel_monitor_claim_key = try!(SecretKey::from_slice(&secp_ctx, &okm)); + hkdf_expand(sha, &prk, b"rust-lightning local commitment seed info", &mut okm); Ok(ChannelKeys { @@ -77,6 +81,7 @@ impl ChannelKeys { delayed_payment_base_key: delayed_payment_base_key, htlc_base_key: htlc_base_key, channel_close_key: channel_close_key, + channel_monitor_claim_key: channel_monitor_claim_key, commitment_seed: okm }) } @@ -284,8 +289,8 @@ impl Channel { }; let secp_ctx = Secp256k1::new(); - let our_channel_close_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&secp_ctx, &chan_keys.channel_close_key).unwrap().serialize()); - let our_channel_monitor_claim_script = Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0).push_slice(&our_channel_close_key_hash[..]).into_script(); + let our_channel_monitor_claim_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&secp_ctx, &chan_keys.channel_monitor_claim_key).unwrap().serialize()); + let our_channel_monitor_claim_script = Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0).push_slice(&our_channel_monitor_claim_key_hash[..]).into_script(); let channel_monitor = ChannelMonitor::new(&chan_keys.revocation_base_key, &PublicKey::from_secret_key(&secp_ctx, &chan_keys.delayed_payment_base_key).unwrap(), &PublicKey::from_secret_key(&secp_ctx, &chan_keys.htlc_base_key).unwrap(), @@ -397,8 +402,8 @@ impl Channel { }; let secp_ctx = Secp256k1::new(); - let our_channel_close_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&secp_ctx, &chan_keys.channel_close_key).unwrap().serialize()); - let our_channel_monitor_claim_script = Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0).push_slice(&our_channel_close_key_hash[..]).into_script(); + let our_channel_monitor_claim_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&secp_ctx, &chan_keys.channel_monitor_claim_key).unwrap().serialize()); + let our_channel_monitor_claim_script = Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0).push_slice(&our_channel_monitor_claim_key_hash[..]).into_script(); let mut channel_monitor = ChannelMonitor::new(&chan_keys.revocation_base_key, &PublicKey::from_secret_key(&secp_ctx, &chan_keys.delayed_payment_base_key).unwrap(), &PublicKey::from_secret_key(&secp_ctx, &chan_keys.htlc_base_key).unwrap(), -- 2.30.2