davide
5d061c6f21
The password parameter accepts null, which saves the wallet in plaintext. The XML doc comment now makes explicit that this is only acceptable when the user has explicitly opted out of encryption with a UI warning shown.
41 lines
1.5 KiB
C#
41 lines
1.5 KiB
C#
namespace PalladiumWallet.Core.Storage;
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/// <summary>
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/// Lettura/scrittura del file wallet su disco (blueprint §8): JSON in chiaro
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/// senza password, contenitore AES-GCM con password. Scrittura atomica
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/// (file temporaneo + rename) per non corrompere il wallet su crash.
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/// </summary>
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public static class WalletStore
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{
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public static bool Exists(string path) => File.Exists(path);
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/// <summary>True se il file richiede una password per l'apertura.</summary>
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public static bool RequiresPassword(string path) =>
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EncryptedFile.IsEncrypted(File.ReadAllText(path));
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public static WalletDocument Load(string path, string? password = null)
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{
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var content = File.ReadAllText(path);
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if (EncryptedFile.IsEncrypted(content))
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{
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if (string.IsNullOrEmpty(password))
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throw new WrongPasswordException();
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content = EncryptedFile.Decrypt(content, password);
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}
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return WalletDocument.FromJson(content);
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}
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/// <param name="password">Null saves in plaintext. Only omit when the user has
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/// explicitly opted out of encryption (UI must show a clear warning).</param>
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public static void Save(WalletDocument doc, string path, string? password = null)
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{
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var content = doc.ToJson();
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if (!string.IsNullOrEmpty(password))
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content = EncryptedFile.Encrypt(content, password);
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var tmp = path + ".tmp";
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File.WriteAllText(tmp, content);
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File.Move(tmp, path, overwrite: true);
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}
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}
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