2 // CipherReference.cs - CipherReference implementation for XML Encryption
3 // http://www.w3.org/2001/04/xmlenc#sec-CipherReference
6 // Tim Coleman (tim@timcoleman.com)
8 // Copyright (C) Tim Coleman, 2004
11 // Permission is hereby granted, free of charge, to any person obtaining
12 // a copy of this software and associated documentation files (the
13 // "Software"), to deal in the Software without restriction, including
14 // without limitation the rights to use, copy, modify, merge, publish,
15 // distribute, sublicense, and/or sell copies of the Software, and to
16 // permit persons to whom the Software is furnished to do so, subject to
17 // the following conditions:
19 // The above copyright notice and this permission notice shall be
20 // included in all copies or substantial portions of the Software.
22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
35 namespace System
.Security
.Cryptography
.Xml
{
36 public sealed class CipherReference
: EncryptedReference
{
40 public CipherReference ()
45 public CipherReference (string uri
)
50 public CipherReference (string uri
, TransformChain tc
)
55 #endregion // Constructors
59 public override XmlElement
GetXml ()
61 return GetXml (new XmlDocument ());
64 internal override XmlElement
GetXml (XmlDocument document
)
66 XmlElement xel
= document
.CreateElement (XmlEncryption
.ElementNames
.CipherReference
, EncryptedXml
.XmlEncNamespaceUrl
);
68 xel
.SetAttribute (XmlEncryption
.AttributeNames
.URI
, Uri
);
70 if (TransformChain
!= null && TransformChain
.Count
> 0) {
71 XmlElement xtr
= document
.CreateElement (XmlEncryption
.ElementNames
.Transforms
, EncryptedXml
.XmlEncNamespaceUrl
);
72 foreach (Transform t
in TransformChain
)
73 xtr
.AppendChild (document
.ImportNode (t
.GetXml (), true));
74 xel
.AppendChild (xtr
);
80 public override void LoadXml (XmlElement
value)
83 throw new ArgumentNullException ("value");
84 if ((value.LocalName
!= XmlEncryption
.ElementNames
.CipherReference
) || (value.NamespaceURI
!= EncryptedXml
.XmlEncNamespaceUrl
))
85 throw new CryptographicException ("Malformed CipherReference element.");
88 TransformChain
= new TransformChain ();
90 foreach (XmlNode n
in value.ChildNodes
) {
91 if (n
is XmlWhitespace
)
94 switch (n
.LocalName
) {
95 case XmlEncryption
.ElementNames
.Transforms
:
96 foreach (XmlNode xn
in ((XmlElement
) n
).GetElementsByTagName (XmlSignature
.ElementNames
.Transform
, XmlSignature
.NamespaceURI
)) {
98 switch (((XmlElement
) xn
).Attributes
[XmlSignature
.AttributeNames
.Algorithm
].Value
) {
99 case XmlSignature
.AlgorithmNamespaces
.XmlDsigBase64Transform
:
100 t
= new XmlDsigBase64Transform ();
102 case XmlSignature
.AlgorithmNamespaces
.XmlDsigC14NTransform
:
103 t
= new XmlDsigC14NTransform ();
105 case XmlSignature
.AlgorithmNamespaces
.XmlDsigC14NWithCommentsTransform
:
106 t
= new XmlDsigC14NWithCommentsTransform ();
108 case XmlSignature
.AlgorithmNamespaces
.XmlDsigEnvelopedSignatureTransform
:
109 t
= new XmlDsigEnvelopedSignatureTransform ();
111 case XmlSignature
.AlgorithmNamespaces
.XmlDsigXPathTransform
:
112 t
= new XmlDsigXPathTransform ();
114 case XmlSignature
.AlgorithmNamespaces
.XmlDsigXsltTransform
:
115 t
= new XmlDsigXsltTransform ();
118 case XmlSignature
.AlgorithmNamespaces
.XmlDecryptionTransform
:
119 t
= new XmlDecryptionTransform ();
126 t
.LoadInnerXml (((XmlElement
) xn
).ChildNodes
);
127 TransformChain
.Add (t
);
133 if (value.HasAttribute (XmlEncryption
.AttributeNames
.URI
))
134 Uri
= value.Attributes
[XmlEncryption
.AttributeNames
.URI
].Value
;
138 #endregion // Methods