aljaz/lightning
1
0
Fork 0
mirror of https://github.com/aljazceru/lightning.git synced 2026-02-22 22:44:25 +01:00
Code Issues Packages Projects Releases Wiki Activity

Remove signature leaking.

Browse Source 
Alpha has segregated witnesses, so txid doesn't include the inputs.
That means we can create the first commit transaction before we sign
the anchor tx.

Bitcoin will need to do this differently: presumbly via new sipops
(a OP_CHECKSIG2VERIFY I imagine).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2015-07-03 14:00:54 +09:30
parent 69b2690ecb
commit a663dc322c
12 changed files with 36 additions and 246 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
test-cli/HOWTO-USE.md
View File

@@ -76,44 +76,30 @@ B:
test-cli/open-anchor-scriptsigs B-open.pb A-open.pb <B-TXINKEY>... > B-anchor-scriptsigs.pb
STEP 3 (The INSECURE hack!)
------
Because we don't have tx normalization or equivalent, we need to
share the signed anchor inputs so the other side can create the
first commitment transaction.
A:
test-cli/leak-anchor-sigs A-anchor-scriptsigs.pb > A-leak-anchor-sigs.pb
B:
test-cli/leak-anchor-sigs B-anchor-scriptsigs.pb > B-leak-anchor-sigs.pb
STEP 4
STEP 3
------
Now both sides create the commitment transaction signatures which spend
the transaction output:
A:
test-cli/open-commit-sig A-open.pb B-open.pb <A-TMPKEY> A-leak-anchor-sigs.pb B-leak-anchor-sigs.pb > A-commit-sig.pb
test-cli/open-commit-sig A-open.pb B-open.pb <A-TMPKEY> > A-commit-sig.pb
B:
test-cli/open-commit-sig B-open.pb A-open.ob <B-TMPKEY> B-leak-anchor-sigs.pb A-leak-anchor-sigs.pb > B-commit-sig.pb
test-cli/open-commit-sig B-open.pb A-open.ob <B-TMPKEY> > B-commit-sig.pb
STEP 5
STEP 4
------
Check the commitment signatures from the other side, and produce commit txs.
A:
test-cli/check-commit-sig A-open.pb B-open.pb B-commit-sig.pb <A-TMPKEY> A-leak-anchor-sigs.pb B-leak-anchor-sigs.pb > A-commit-0.tx
test-cli/check-commit-sig A-open.pb B-open.pb B-commit-sig.pb <A-TMPKEY> > A-commit-0.tx
B:
test-cli/check-commit-sig B-open.pb A-open.pb A-commit-sig.pb <B-TMPKEY> B-leak-anchor-sigs.pb A-leak-anchor-sigs.pb > B-commit-0.tx
test-cli/check-commit-sig B-open.pb A-open.pb A-commit-sig.pb <B-TMPKEY> > B-commit-0.tx
STEP 6
STEP 5
------
Check the anchor signatures from the other side, and use them to generate the
anchor transaction (as a hex string, suitable for bitcoind).
@@ -129,7 +115,7 @@ They should be identical:
cmp A-anchor.tx B-anchor.tx || echo FAIL
STEP 7
STEP 6
------
Broadcast the anchor transaction: