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| public class IdentifierMasking | |
| { | |
| private static byte[] _key; | |
| public IdentifierMasking(byte[] key = null) | |
| { | |
| _key = key ?? Sodium.SecretBox.GenerateKey(); | |
| } | |
| public string RevealIdentifier(string hidden) | |
| { | |
| Span<byte> data = SimpleBase.Base58.Bitcoin.Decode(hidden); | |
| byte[] nonce = data.Slice(0, 12).ToArray(); | |
| byte[] encrypted = data.Slice(12).ToArray(); | |
| byte[] plain = Sodium.SecretAeadAes.Decrypt(encrypted, nonce, _key); | |
| return Encoding.UTF8.GetString(plain); | |
| } | |
| public string HideIdentifier(string id) | |
| { | |
| byte[] nonce = Sodium.SecretAeadAes.GenerateNonce(); | |
| byte[] encrypted = Sodium.SecretAeadAes.Encrypt(Encoding.UTF8.GetBytes(id), nonce, _key); | |
| return SimpleBase.Base58.Bitcoin.Encode(nonce.Concat(encrypted).ToArray()); | |
| } | |
| } |
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