func IdForKey(pk rsa.PublicKey) Id {
// Write the Rsa64 representation of public key into Sha256
pk64 := []byte(rsa64.PubToBase64(&pk))
sha256 := sha256.New()
for {
n, err := sha256.Write(pk64)
if err != nil {
panic("sha256 malfunction")
}
if n == len(pk64) {
break
}
pk64 = pk64[n:]
}
// Compute and fold the Sha256 hash
h := sha256.Sum()
if len(h) != 32 {
panic("expecting 32 bytes")
}
for i := 1; i < 4; i++ {
for j := 0; j < 8; j++ {
h[j] ^= h[8*i+j]
}
}
id64, err := bytes.BytesToInt64(h[0:8])
if err != nil {
panic("logic")
}
return Id(id64)
}
func (hk *HelloPubKey) String() string { return rsa64.PubToBase64(hk.RSAPubKey()) }
func (cmpk *CipherMsgPubKey) String() string {
return rsa64.PubToBase64(cmpk.rsa)
}
func (sk *SigPubKey) String() string {
return rsa64.PubToBase64(sk.RsaPubKey())
}