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Add EncryptionMode to header and validate in reader #5

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Merged
manusoft merged 1 commit into from
May 25, 2026
Merged

Add EncryptionMode to header and validate in reader #5

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4 changes: 2 additions & 2 deletions src/Filo/Core/FiloReader.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -192,8 +192,8 @@ public async IAsyncEnumerable<byte[]> StreamFileAsync(string fileName, byte[]? k
if (!_fileMap.TryGetValue(fileName, out var entry))
throw new FileNotFoundException($"File '{fileName}' not found in container.");

if (Header.Encryption == "AES256" && key == null)
throw new InvalidOperationException("This container is encrypted. Provide a key.");
if (Header.Encryption == "AES256" && Header.EncryptionMode != "AES-CBC")
throw new InvalidDataException("Unsupported encryption mode.");

if (entry.Chunks.Count == 0)
yield break;
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1 change: 1 addition & 0 deletions src/Filo/Core/FiloWriter.cs
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Expand Up @@ -111,6 +111,7 @@ public async Task WriteAsync()
FileCount = _files.Count,
Compression = "none",
Encryption = _encrypt ? "AES256" : "none",
EncryptionMode = _encrypt ? "AES-CBC" : null,
Kdf = !string.IsNullOrWhiteSpace(_password) ? "PBKDF2" : null,
Salt = !string.IsNullOrWhiteSpace(_password) ? Convert.ToBase64String(_salt!) : null,
PasswordCheck = _encrypt ? SHA256.HashData(_key!) : null,
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2 changes: 2 additions & 0 deletions src/Filo/Models/FiloHeader.cs
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Expand Up @@ -14,6 +14,8 @@ public class FiloHeader

public string Encryption { get; set; } = "none";

public string? EncryptionMode { get; set; } = "AES-CBC";

public string? Kdf { get; set; } // v1.1

public string? Salt { get; set; } // v1.1
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