// Checks the signature of a message. Returns an int based on who signed it:
// 1 -> Federated Signature
// 0 -> Audit Signature
// -1 -> Neither Fed or Audit Signature
func (st *State) FastVerifyAuthoritySignature(msg []byte, sig interfaces.IFullSignature, dbheight uint32) (int, error) {
feds := st.GetFedServers(dbheight)
if feds == nil {
return 0, fmt.Errorf("Federated Servers are unknown at directory block hieght %d", dbheight)
}
auds := st.GetAuditServers(dbheight)
for _, fed := range feds {
auth, _ := st.GetAuthority(fed.GetChainID())
if auth == nil {
continue
}
compareKey, err := auth.SigningKey.MarshalBinary()
if err == nil {
if pkEq(sig.GetKey(), compareKey) {
valid, err := auth.VerifySignature(msg, sig.GetSignature())
if err == nil && valid {
return 1, nil
}
}
}
}
for _, aud := range auds {
auth, _ := st.GetAuthority(aud.GetChainID())
if auth == nil {
continue
}
compareKey, err := auth.SigningKey.MarshalBinary()
if err == nil {
if pkEq(sig.GetKey(), compareKey) {
valid, err := auth.VerifySignature(msg, sig.GetSignature())
if err == nil && valid {
return 0, nil
}
}
}
}
//fmt.Println("WARNING: A signature failed to validate.")
return -1, fmt.Errorf("%s", "Signature Key Invalid or not Federated Server Key")
}
