private static DbPersistentData ReadDatabase(
Stream stream, Headers headers, byte[] masterKey)
{
var decrypted = FileFormat.Decrypt(
stream, headers, masterKey);
if (decrypted == null)
{
return(null);
}
using (decrypted)
using (var buffer = new MemoryStream())
{
BufferEx.CopyStream(decrypted, buffer);
return(new DbPersistentData
{
MasterKey = masterKey,
Xml = buffer.ToArray(),
Protection = CryptoSerializer
.Serialize(headers),
});
}
}
public async Task Decrypt_should_decrypt_content()
{
using (var input = TestFiles.Read("IO.Demo7Pass.kdbx"))
{
input.Seek(222);
var masterSeed = CryptographicBuffer.DecodeFromHexString(
"2b4656399a5bdf9fdfe9e8705a34b6f484f9b1b940c3d7cfb7ffece3b634e0ae");
var masterKey = CryptographicBuffer.DecodeFromHexString(
"87730050341ff55c46421f2f2a5f4e1e018d0443d19cacc8682f128f1874d0a4");
var encryptionIV = CryptographicBuffer.DecodeFromHexString(
"f360c29e1a603a6548cfbb28da6fff50");
using (var decrypted = await FileFormat.Decrypt(input,
masterKey, masterSeed, encryptionIV))
{
var buffer = WindowsRuntimeBuffer.Create(32);
buffer = await decrypted.ReadAsync(buffer, 32);
Assert.Equal(
"54347fe32f3edbccae1fc60f72c11dafd0a72487b315f9b174ed1073ed67a6e0",
CryptographicBuffer.EncodeToHexString(buffer));
}
}
}
public async Task OpenDatabase()
{
var database = await OpenFileAsync();
using (var fs = await database.OpenReadAsync())
{
// TODO: handle errors & display transformation progress
var result = await FileFormat.Headers(fs);
var headers = result.Headers;
var masterKey = await _password
.GetMasterKey(headers);
using (var decrypted = await FileFormat
.Decrypt(fs, masterKey, headers))
{
// TODO: verify start bytes
await FileFormat.VerifyStartBytes(
decrypted, headers);
// Parse content
var doc = await FileFormat.ParseContent(
decrypted, headers.UseGZip, headers);
// TODO: verify headers integrity
_cache.Cache(new CachedDatabase
{
Id = Id,
Document = doc,
Name = DisplayName,
Headers = headers,
});
_navigation
.UriFor <GroupViewModel>()
.Navigate();
_navigation.BackStack.Remove(
_navigation.BackStack.Last());
}
}
}
public void LoadExisting(Stream existing, byte[] masterKey)
{
if (existing == null)
{
throw new ArgumentNullException("existing");
}
if (masterKey == null)
{
throw new ArgumentNullException("masterKey");
}
var reader = new BinaryReader(existing);
if (!FileFormat.Sign(reader))
{
throw new FormatException(
"Invalid format detected");
}
_version = FileFormat
.ReadVersion(reader);
_masterKey = masterKey;
_headers = FileFormat
.ReadHeaders(existing);
_xmlWriter = new XmlWriter();
using (var decrypt = FileFormat.Decrypt(
existing, _headers, masterKey))
{
_xmlWriter.Load(decrypt);
var crypto = CryptoSerializer
.Create(_headers);
_xmlWriter.Decrypt(crypto);
}
}
public async Task Database_decryption()
{
using (var kdbx = TestFiles.Read("IO.Demo7Pass.kdbx"))
{
// Headers
var result = await FileFormat.Headers(kdbx);
Assert.Equal(FileFormats.Supported, result.Format);
var headers = result.Headers;
Assert.NotNull(headers);
// Master Key
var password = new PasswordData
{
Password = "******",
};
var masterKey = await password
.GetMasterKey(headers);
// Decrypt
using (var decrypted = await FileFormat
.Decrypt(kdbx, masterKey, headers))
{
// Start bytes
Assert.True(await FileFormat
.VerifyStartBytes(decrypted, headers));
// Parse content
var doc = await FileFormat.ParseContent(
decrypted, headers.UseGZip, headers);
Assert.True(FileFormat.VerifyHeaders(headers, doc));
}
}
}
