deserialize method
Interface for intput serialization.
Implementation
@override
void deserialize(SerializableInput input) {
keytype = deserializeString(input);
if (keytype != 'ssh-rsa') throw FormatException('$keytype');
n = deserializeMpInt(input);
e = deserializeMpInt(input);
d = deserializeMpInt(input);
iqmp = deserializeMpInt(input);
p = deserializeMpInt(input);
q = deserializeMpInt(input);
comment = deserializeString(input);
}