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No code changes; export some functions/struct.

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This commit is contained in:
Kleissner
2021-02-26 14:45:16 +01:00
parent fec65603f5
commit ea05439262
9 changed files with 26 additions and 24 deletions
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14
Packet Encoding.go
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@@ -30,8 +30,8 @@ import (
"lukechampine.com/blake3"
)
// packetRaw is a decrypted P2P message
type packetRaw struct {
// PacketRaw is a decrypted P2P message
type PacketRaw struct {
Protocol uint8 // Protocol version = 0
Command uint8 // 0 = Announcement
Payload []byte // Payload
@@ -42,8 +42,8 @@ const packetLengthMin = 8 + signatureSize
const signatureSize = 65
const maxRandomGarbage = 20
// packetDecrypt decrypts the packet, verifies its signature and returns a high-level version of the packet.
func packetDecrypt(raw []byte, receiverPublicKey *btcec.PublicKey) (packet *packetRaw, senderPublicKey *btcec.PublicKey, err error) {
// PacketDecrypt decrypts the packet, verifies its signature and returns a high-level version of the packet.
func PacketDecrypt(raw []byte, receiverPublicKey *btcec.PublicKey) (packet *PacketRaw, senderPublicKey *btcec.PublicKey, err error) {
// Packet is assumed to be already checked for minimum length.
// Prepare Salsa20 nonce and key. Nonce = 2x first 4 bytes. For size reasons, only 4 bytes (instead of 8 bytes) is supplied in the packet.
@@ -68,7 +68,7 @@ func packetDecrypt(raw []byte, receiverPublicKey *btcec.PublicKey) (packet *pack
salsa20.XORKeyStream(bufferDecrypted[:], raw[4:len(raw)-signatureSize], nonce, keySalsa)
// copy all fields
packet = &packetRaw{Protocol: bufferDecrypted[0], Command: bufferDecrypted[1]}
packet = &PacketRaw{Protocol: bufferDecrypted[0], Command: bufferDecrypted[1]}
sizePayload := binary.LittleEndian.Uint16(bufferDecrypted[2:4])
if int(sizePayload) > len(bufferDecrypted)-4 { // invalid length?
@@ -82,8 +82,8 @@ func packetDecrypt(raw []byte, receiverPublicKey *btcec.PublicKey) (packet *pack
return packet, senderPublicKey, nil
}
// packetEncrypt encrypts a packet using the provided senders private key and receivers compressed public key.
func packetEncrypt(senderPrivateKey *btcec.PrivateKey, receiverPublicKey *btcec.PublicKey, packet *packetRaw) (raw []byte, err error) {
// PacketEncrypt encrypts a packet using the provided senders private key and receivers compressed public key.
func PacketEncrypt(senderPrivateKey *btcec.PrivateKey, receiverPublicKey *btcec.PublicKey, packet *PacketRaw) (raw []byte, err error) {
garbage := packetGarbage(packetLengthMin + len(packet.Payload))
raw = make([]byte, packetLengthMin+len(packet.Payload)+len(garbage))