/// <summary>
/// Gets the connection string with decrypted value.
/// </summary>
/// <param name="encryptionMeta">The encryption meta.</param>
/// <param name="connectionString">The connection string.</param>
/// <param name="connectionStringKey">The connection string key.</param>
/// <returns></returns>
/// <exception cref="System.ArgumentNullException">
/// encryptionMeta;The expected metadata is not here.
/// or
/// connectionString;The expected configuration settings are not here.
/// </exception>
/// <exception cref="System.NullReferenceException"></exception>
public static string GetConnectionStringWithDecryptedValue(this EncryptionMetadata encryptionMeta, string connectionString, string connectionStringKey)
{
if (encryptionMeta == null)
{
throw new ArgumentNullException("encryptionMeta", "The expected metadata is not here.");
}
if (string.IsNullOrEmpty(connectionString))
{
throw new ArgumentNullException("connectionString", "The expected configuration settings are not here.");
}
var builder = new DbConnectionStringBuilder();
builder.ConnectionString = connectionString;
var key = builder.Keys.OfType <string>().FirstOrDefault(i => i.ToLowerInvariant() == connectionStringKey);
if (key == null)
{
throw new NullReferenceException(string.Format("The expected key “{0}” in connection string is not here.", connectionStringKey));
}
var decryptedValue = encryptionMeta.Decrypt(builder[connectionStringKey].ToString());
builder[connectionStringKey] = decryptedValue;
return(builder.ConnectionString);
}
/// <summary>
/// Gets the connection string with decrypted value.
/// </summary>
/// <param name="encryptionMeta">The encryption meta.</param>
/// <param name="settings">The settings.</param>
/// <param name="connectionStringKey">The connection string key.</param>
/// <returns></returns>
/// <exception cref="System.ArgumentNullException">settings;The expected configuration settings are not here.</exception>
public static string GetConnectionStringWithDecryptedValue(this EncryptionMetadata encryptionMeta, ConnectionStringSettings settings, string connectionStringKey)
{
if (settings == null)
{
throw new ArgumentNullException("settings", "The expected configuration settings are not here.");
}
return(encryptionMeta.GetConnectionStringWithDecryptedValue(settings.ConnectionString, connectionStringKey));
}
/// <summary>
/// Gets the connection string.
/// </summary>
/// <param name="encryptionMeta">The encryption meta.</param>
/// <param name="settings">The settings.</param>
/// <returns></returns>
/// <exception cref="System.ArgumentNullException">
/// encryptionMeta;The expected metadata is not here.
/// or
/// settings;The expected configuration settings are not here.
/// </exception>
public static string GetConnectionString(this EncryptionMetadata encryptionMeta, ConnectionStringSettings settings)
{
if (settings == null)
{
throw new ArgumentNullException("settings", "The expected configuration settings are not here.");
}
var connectionString = encryptionMeta.Decrypt(settings.ConnectionString);
return(connectionString);
}
/// <summary>
/// Decrypts the specified encrypted string.
/// </summary>
/// <param name="encryptionMeta">The encryption meta.</param>
/// <param name="encryptedString">The encrypted string.</param>
/// <returns></returns>
/// <exception cref="System.ArgumentNullException">
/// encryptionMeta;The expected metadata is not here.
/// or
/// encryptedString;The expected encrypted string is not here.
/// </exception>
public static string Decrypt(this EncryptionMetadata encryptionMeta, string encryptedString)
{
if (encryptionMeta == null)
{
throw new ArgumentNullException("encryptionMeta", "The expected metadata is not here.");
}
if (string.IsNullOrEmpty(encryptedString))
{
throw new ArgumentNullException("encryptedString", "The expected encrypted string is not here.");
}
var crypt = new SymmetricCrypt();
return(crypt.Decrypt(encryptedString, encryptionMeta.Key, encryptionMeta.InitialVector));
}
