/// <summary>
/// Constructor that accepts values for all mandatory fields
/// </summary>
///<param name="algorithm">The method used to encrypt the user's password. See the implementation details below.</param>
///<param name="keyName">The name of the key to be used for decryption of the password. Left blank for plain, encoded text (Algorithm attribute value of "base64") and hash algorithms.</param>
///<param name="value">Gets or sets the content value of the &lt;Password&gt; element</param>
///
public Password( PasswordAlgorithm algorithm, string keyName, string value )
: base(InfraDTD.PASSWORD)
{
this.SetAlgorithm( algorithm );
this.KeyName = keyName;
this.Value = value;
}
/// <summary>
/// Sets the value of the <c>Algorithm</c> attribute.
/// </summary>
/// <param name="val">A PasswordAlgorithm object</param>
/// <remarks>
/// <para>The SIF specification defines the meaning of this attribute as: "The method used to encrypt the user's password. See the implementation details below."</para>
/// <para>Version: 2.5</para>
/// <para>Since: 1.5r1</para>
/// </remarks>
public void SetAlgorithm( PasswordAlgorithm val )
{
SetField( InfraDTD.PASSWORD_ALGORITHM, val );
}
/// <summary>
/// Sets the value of the <c>Algorithm</c> attribute.
/// </summary>
/// <param name="val">A PasswordAlgorithm object</param>
/// <remarks>
/// <para>The SIF specification defines the meaning of this attribute as: "The method used to encrypt the user's password. See the implementation details below."</para>
/// <para>Version: 2.6</para>
/// <para>Since: 1.5r1</para>
/// </remarks>
public void SetAlgorithm(PasswordAlgorithm val)
{
SetField(InfraDTD.PASSWORD_ALGORITHM, val);
}
/// <summary>
/// Constructor that accepts values for all mandatory fields
/// </summary>
///<param name="algorithm">The method used to encrypt the user's password. See the implementation details below.</param>
///<param name="keyName">The name of the key to be used for decryption of the password. Left blank for plain, encoded text (Algorithm attribute value of "base64") and hash algorithms.</param>
///<param name="value">Gets or sets the content value of the &lt;Password&gt; element</param>
///
public Password(PasswordAlgorithm algorithm, string keyName, string value) : base(InfraDTD.PASSWORD)
{
this.SetAlgorithm(algorithm);
this.KeyName = keyName;
this.Value = value;
}
public SifSymmetricEncryption( PasswordAlgorithm algorithm,
string keyName,
SymmetricAlgorithm alg,
byte [] key )
: base(algorithm, keyName)
{
fSymmetricAlgorithm = alg;
alg.Key = key;
alg.BlockSize = 64;
alg.Mode = CipherMode.CBC;
alg.Padding = PaddingMode.PKCS7;
}
public SifHashEncryption( PasswordAlgorithm algorithm,
string keyName,
HashAlgorithm alg )
: base(algorithm, string.Empty)
{
fHashAlgorithm = alg;
}
public SifClearTextEncryption( PasswordAlgorithm algorithm,
string keyName )
: base(algorithm, string.Empty)
{
}
/// <summary>
/// Creates an instance of SIFEncryption that uses the specified
/// PasswordAlgorithm, keyName and key
/// </summary>
/// <param name="algorithm">The algorithm to use for encrypting or decrypting passwords</param>
/// <param name="keyName">The name of the encryption key to use.</param>
/// <param name="key">The encryption key to use. This parameter is ignored for
/// SHA1 and MD5 because they are not keyed hash algorithms </param>
/// <returns>An instance of the SifEncryption class for reading and writing passwords</returns>
public static SifEncryption GetInstance(
PasswordAlgorithm algorithm,
string keyName,
byte [] key
)
{
if ( sCurrentInstance != null ) {
if ( !sCurrentInstance.fDisposed &&
sCurrentInstance.Algorithm.Value.Equals( algorithm.Value ) &&
(sCurrentInstance.KeyName == keyName || sCurrentInstance.Key == null) ) {
return sCurrentInstance;
}
else {
sCurrentInstance.Dispose();
sCurrentInstance = null;
}
}
if (algorithm.ValueEquals("base64")){
sCurrentInstance = new SifClearTextEncryption( algorithm, keyName );
}
else if ( algorithm.Value == PasswordAlgorithm.SHA1.Value ) {
sCurrentInstance = new SifHashEncryption( algorithm, keyName, new SHA1Managed() );
}
else if ( algorithm.Value == PasswordAlgorithm.MD5.Value ) {
sCurrentInstance =
new SifHashEncryption( algorithm, keyName, new MD5CryptoServiceProvider() );
}
else if ( algorithm.Value == PasswordAlgorithm.DES.Value ) {
sCurrentInstance =
new SifSymmetricEncryption
( algorithm, keyName, new DESCryptoServiceProvider(), key );
}
else if ( algorithm.Value == PasswordAlgorithm.TRIPLEDES.Value ) {
sCurrentInstance =
new SifSymmetricEncryption
( algorithm, keyName, new TripleDESCryptoServiceProvider(), key );
}
else if ( algorithm.Value == PasswordAlgorithm.RC2.Value ) {
sCurrentInstance =
new SifSymmetricEncryption
( algorithm, keyName, new RC2CryptoServiceProvider(), key );
}
else {
throw new AdkNotSupportedException
( string.Format( "Encryption algorithm {0} is not supported.", algorithm.Value ) );
}
return sCurrentInstance;
}
private SifEncryption( PasswordAlgorithm algorithm,
string keyName )
{
fkeyName = keyName;
fAlgorithm = algorithm;
}
