func (db *DB) AddKey(id string, k *data.Key) error {
if k.Type != "ed25519" {
return ErrWrongType
}
if id != k.ID() {
return ErrWrongID
}
if len(k.Value.Public) != ed25519.PublicKeySize {
return ErrInvalidKey
}
var key Key
copy(key.Public[:], k.Value.Public)
key.ID = id
db.keys[id] = &key
return nil
}
func Sign(s *data.Signed, k *data.Key) {
id := k.ID()
signatures := make([]data.Signature, 0, len(s.Signatures)+1)
for _, sig := range s.Signatures {
if sig.KeyID == id {
continue
}
signatures = append(signatures, sig)
}
priv := [ed25519.PrivateKeySize]byte{}
copy(priv[:], k.Value.Private)
sig := ed25519.Sign(&priv, s.Signed)
s.Signatures = append(signatures, data.Signature{
KeyID: id,
Method: "ed25519",
Signature: sig[:],
})
}