cwinfo/yggdrasil-go
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(broken state) WIP on tuntap

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Arceliar
2021-05-08 10:39:07 -05:00
parent f1c37f8440
commit 0cff56fcc1
6 changed files with 524 additions and 547 deletions
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32
src/address/address.go
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@ -112,3 +112,35 @@ func SubnetForKey(publicKey ed25519.PublicKey) *Subnet {
snet[len(prefix)-1] |= 0x01
return &snet
}
// GetKet returns the partial ed25519.PublicKey for the Address.
// This is used for key lookup.
func (a *Address) GetKey() ed25519.PublicKey {
var key [ed25519.PublicKeySize]byte
prefix := GetPrefix()
ones := int(a[len(prefix)])
for idx := 0; idx < ones; idx++ {
key[idx/8] |= 0x80 >> byte(idx%8)
}
keyOffset := ones + 1
addrOffset := 8*len(prefix) + 8
for idx := addrOffset; idx < 8*len(a); idx++ {
bits := a[idx/8] & (0x80 >> byte(idx%8))
bits <<= byte(idx % 8)
keyIdx := keyOffset + (idx - addrOffset)
bits >>= byte(keyIdx % 8)
key[keyIdx/8] |= bits
}
for idx := range key {
key[idx] = ^key[idx]
}
return ed25519.PublicKey(key[:])
}
// GetKet returns the partial ed25519.PublicKey for the Subnet.
// This is used for key lookup.
func (s *Subnet) GetKey() ed25519.PublicKey {
var addr Address
copy(addr[:], s[:])
return addr.GetKey()
}