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sphinx: Committing the onion packet to the payment-hash

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The sphinx onion packet now commits to the HTLC payment-hash it is
associated with. This prevents replay attacks with the same onion.
This commit is contained in:
Christian Decker
2017-01-13 22:50:10 +01:00
committed by Rusty Russell
parent 91b17d45d8
commit cae283087d
5 changed files with 41 additions and 15 deletions
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9
test/test_sphinx.c
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@@ -16,6 +16,8 @@ int main(int argc, char **argv)
{
bool generate = false, decode = false;
const tal_t *ctx = talz(NULL, tal_t);
u8 assocdata[32];
memset(assocdata, 'B', sizeof(assocdata));
secp256k1_ctx = secp256k1_context_create(
SECP256K1_CONTEXT_VERIFY | SECP256K1_CONTEXT_SIGN);
@@ -56,7 +58,9 @@ int main(int argc, char **argv)
struct onionpacket *res = create_onionpacket(ctx,
path,
hoppayloads,
sessionkey);
sessionkey,
assocdata,
sizeof(assocdata));
u8 *serialized = serialize_onionpacket(ctx, res);
if (!serialized)
@@ -87,7 +91,8 @@ int main(int argc, char **argv)
if (!msg)
errx(1, "Error parsing message.");
step = process_onionpacket(ctx, msg, &seckey);
step = process_onionpacket(ctx, msg, &seckey, assocdata,
sizeof(assocdata));
if (!step->next)
errx(1, "Error processing message.");