/// <summary>
/// Creates a new backup index
/// </summary>
/// <param name="path">
/// The path to the backup index file to create
/// </param>
/// <param name="header">
/// The backup index header to insert
/// </param>
/// <returns>
/// A new backup index implementation
/// </returns>
public static IBackupIndex Create(IO.Path path, Header header)
{
// create the backup index file and schema
Database.Create(path, "SkyFloe.Sqlite.Resources.BackupIndex.sql");
var index = (BackupIndex)null;
try
{
// connect to the database and add the header row
index = new BackupIndex(path);
index.Execute(
"INSERT INTO Header (" +
" Version, " +
" CryptoIterations, " +
" ArchiveSalt, " +
" PasswordHash, " +
" PasswordSalt) " +
"VALUES (@p0, @p1, @p2, @p3, @p4);",
header.Version = CurrentVersion,
header.CryptoIterations,
header.ArchiveSalt,
header.PasswordHash,
header.PasswordSalt
);
return index;
}
catch
{
if (index != null)
index.Dispose();
try { Database.Delete(path); } catch { }
throw;
}
}
/// <summary>
/// Creates and connects to a new backup archive
/// </summary>
/// <param name="name">
/// The name of the archive to create
/// </param>
/// <param name="password">
/// The security password for the archive
/// </param>
public void CreateArchive(String name, String password)
{
// validate parameters
if (this.Connection == null)
throw new InvalidOperationException(Strings.ConnectionNotConnected);
if (this.archive != null)
throw new InvalidOperationException(Strings.ConnectionAlreadyConnected);
var store = this.Connection.Store;
try
{
// verify that the archive does not already exist at the store
if (store.ListArchives().Contains(name, StringComparer.OrdinalIgnoreCase))
throw new InvalidOperationException(
String.Format(Strings.EngineArchiveExists, name)
);
// create the archive header and encryption parameters
var random = RandomNumberGenerator.Create();
var header = new Backup.Header()
{
CryptoIterations = DefaultCryptoIterations,
ArchiveSalt = new Byte[DefaultCryptoSaltLength],
PasswordSalt = new Byte[DefaultCryptoSaltLength]
};
random.GetBytes(header.ArchiveSalt);
random.GetBytes(header.PasswordSalt);
using (var hash = CreateHasher(password, header))
header.PasswordHash = hash.GetBytes(DefaultCryptoHashLength);
// attach the encryption algorithm and
// delegate to the store implementation to create the archive
this.crypto = CreateCrypto(password, header);
this.archive = store.CreateArchive(name, header);
}
catch
{
CloseArchive();
throw;
}
}
