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Update constants at top to reflect new k value

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This commit is contained in:
Olaoluwa Osuntokun
2015-10-17 14:33:55 -07:00
parent cbfefdf0f4
commit 4efb397ade
1 changed files with 9 additions and 7 deletions
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16
sphinx.go
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@ -37,14 +37,18 @@ const (
// Special destination to indicate we're at the end of the path. // Special destination to indicate we're at the end of the path.
nullDestination = 0x00 nullDestination = 0x00
// (2r + 3)k = (2*5 + 3) * 16 = 208 // (2r + 3)k = (2*5 + 3) * 32 = 416
numStreamBytes = 208 // The number of bytes produced by our CSPRG for the key stream
// implementing our stream cipher to encrypt/decrypt the mix header. The
// last 2 * securityParameter bytes are only used in order to generate/check
// the MAC over the header.
numStreamBytes = (2*numMaxHops + 3) * securityParameter
sharedSecretSize = 32 sharedSecretSize = 32
// node_id + mac + (2*5-1)*16 // node_id + mac + (2*5-1)*32
// 16 + 16 + 144 // 32 + 32 + 288
routingInfoSize = 176 routingInfoSize = 352
) )
type LnEndpoint string type LnEndpoint string
@ -204,8 +208,6 @@ func generateHeaderPadding(numHops int, sharedSecrets [][sharedSecretSize]byte)
} }
// CreateForwardingMessage... // CreateForwardingMessage...
// TODO(roasbeef): Identifier should also been the same size as the security paramter.
// Should probably go with k = 32 then.
func CreateForwardingMessage(route []*btcec.PublicKey, dest LnAddr, func CreateForwardingMessage(route []*btcec.PublicKey, dest LnAddr,
identifier [securityParameter]byte, message []byte) (*MixHeader, *[messageSize]byte, error) { identifier [securityParameter]byte, message []byte) (*MixHeader, *[messageSize]byte, error) {
routeLength := len(route) routeLength := len(route)