Моето решение:
Модел:
public class Patient
{
//comes from the client as XXXXXXXXX, RegEx: "([0-9]{9})"
public EncryptedString SocialSecurityNumber { get; set; }
}
Персонализиран тип:
public class EncryptedString
{
private readonly string _value;
public EncryptedString(string value)
{
_value = value;
}
public static implicit operator string(EncryptedString s)
{
return s._value;
}
public static implicit operator EncryptedString(string value)
{
if (value == null)
return null;
return new EncryptedString(value);
}
}
Сериализатор (с помощта на детерминистично криптиране ):
public interface IEncryptedStringSerializer : IBsonSerializer<EncryptedString> {}
public class EncryptedStringSerializer : SerializerBase<EncryptedString>, IEncryptedStringSerializer
{
private readonly IDeterministicEncrypter _encrypter;
private readonly string _encryptionKey;
public EncryptedStringSerializer(IConfiguration configuration, IDeterministicEncrypter encrypter)
{
_encrypter = encrypter;
_encryptionKey = configuration.GetSection("MongoDb")["EncryptionKey"];
}
public override EncryptedString Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
{
var encryptedString = context.Reader.ReadString();
return _encrypter.DecryptStringWithPassword(encryptedString, _encryptionKey);
}
public override void Serialize(BsonSerializationContext context, BsonSerializationArgs args, EncryptedString value)
{
var encryptedString = _encrypter.EncryptStringWithPassword(value, _encryptionKey);
context.Writer.WriteString(encryptedString);
}
}
Регистриране на сериализатора:
collection.AddScoped<IEncryptedStringSerializer, EncryptedStringSerializer>();
//then later...
BsonSerializer.RegisterSerializer<EncryptedString>(sp.GetService<IEncryptedStringSerializer>());