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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
using System;
namespace System.IdentityModel.Tokens
{
/// <summary>
/// This class defines the encrypting credentials which can be used to
/// encrypt the proof key. It is very similar to SigningCredentials class defined
/// in System.IdentityModel.dll
/// </summary>
public class EncryptingCredentials
{
string _algorithm;
SecurityKey _key;
SecurityKeyIdentifier _keyIdentifier;
/// <summary>
/// Constructor for easy subclassing.
/// </summary>
public EncryptingCredentials()
{
}
/// <summary>
/// Constructs an EncryptingCredentials with a security key, a security key identifier and
/// the encryption algorithm.
/// </summary>
/// <param name="key">A security key for encryption.</param>
/// <param name="keyIdentifier">A security key identifier for the encryption key.</param>
/// <param name="algorithm">The encryption algorithm.</param>
/// <exception cref="ArgumentNullException">When key is null.</exception>
/// <exception cref="ArgumentNullException">When key identifier is null.</exception>
/// <exception cref="ArgumentNullException">When algorithm is null.</exception>
public EncryptingCredentials(SecurityKey key, SecurityKeyIdentifier keyIdentifier, string algorithm)
{
if (key == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("key");
}
if (keyIdentifier == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("keyIdentifier");
}
if (string.IsNullOrEmpty(algorithm))
{
throw DiagnosticUtility.ThrowHelperArgumentNullOrEmptyString("algorithm");
}
//
// It is possible that keyIdentifier is pointing to a token which
// is not capable of doing the given algorithm, we have no way verify
// that at this level.
//
_algorithm = algorithm;
_key = key;
_keyIdentifier = keyIdentifier;
}
/// <summary>
/// Gets or sets the encryption algorithm.
/// </summary>
public string Algorithm
{
get
{
return _algorithm;
}
set
{
if (string.IsNullOrEmpty(value))
{
throw DiagnosticUtility.ThrowHelperArgumentNullOrEmptyString("value");
}
_algorithm = value;
}
}
/// <summary>
/// Gets or sets the encryption key material.
/// </summary>
public SecurityKey SecurityKey
{
get
{
return _key;
}
set
{
if (value == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("value");
}
_key = value;
}
}
/// <summary>
/// Gets or sets the SecurityKeyIdentifier that identifies the encrypting credential.
/// </summary>
public SecurityKeyIdentifier SecurityKeyIdentifier
{
get
{
return _keyIdentifier;
}
set
{
if (value == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("value");
}
_keyIdentifier = value;
}
}
}
}
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