/// <summary>Loads XML information into the <see langword="<CipherReference>" /> element in XML encryption.</summary>
/// <param name="value">An <see cref="T:System.Xml.XmlElement" /> object that represents an XML element to use as the reference.</param>
/// <exception cref="T:System.ArgumentNullException">The <paramref name="value" /> provided is <see langword="null" />.</exception>
public override void LoadXml(XmlElement value)
{
if (value == null)
{
throw new ArgumentNullException(nameof(value));
}
ReferenceType = value.LocalName;
string attribute = Exml.GetAttribute(value, "URI", "http://www.w3.org/2001/04/xmlenc#");
if (attribute == null)
{
throw new CryptographicException("Cryptography_Xml_UriRequired");
}
Uri = attribute;
XmlNamespaceManager nsmgr = new XmlNamespaceManager(value.OwnerDocument.NameTable);
nsmgr.AddNamespace("enc", "http://www.w3.org/2001/04/xmlenc#");
XmlNode xmlNode = value.SelectSingleNode("enc:Transforms", nsmgr);
if (xmlNode != null)
{
TransformChain.LoadXml(xmlNode as XmlElement);
}
m_cachedXml = value;
}
internal Reference(XmlElement element)
{
this.m_transformChain = new TransformChain();
this.m_refTarget = (object)element;
this.m_refTargetType = ReferenceTargetType.XmlElement;
this.m_cachedXml = (XmlElement)null;
this.m_digestMethod = SignedXml.XmlDsigDigestDefault;
}
/// <summary>Initializes a new instance of the <see cref="T:System.Security.Cryptography.Xml.Reference" /> class with a hash value of the specified <see cref="T:System.IO.Stream" />.</summary>
/// <param name="stream">The <see cref="T:System.IO.Stream" /> with which to initialize the new instance of <see cref="T:System.Security.Cryptography.Xml.Reference" />. </param>
public Reference(Stream stream)
{
this.m_transformChain = new TransformChain();
this.m_refTarget = (object)stream;
this.m_refTargetType = ReferenceTargetType.Stream;
this.m_cachedXml = (XmlElement)null;
this.m_digestMethod = SignedXml.XmlDsigDigestDefault;
}
/// <summary>Initializes a new instance of the <see cref="T:System.Security.Cryptography.Xml.Reference" /> class with the specified <see cref="T:System.Uri" />.</summary>
/// <param name="uri">The <see cref="T:System.Uri" /> with which to initialize the new instance of <see cref="T:System.Security.Cryptography.Xml.Reference" />. </param>
public Reference(string uri)
{
this.m_transformChain = new TransformChain();
this.m_refTarget = (object)uri;
this.m_uri = uri;
this.m_refTargetType = ReferenceTargetType.UriReference;
this.m_cachedXml = (XmlElement)null;
this.m_digestMethod = SignedXml.XmlDsigDigestDefault;
}
internal new XmlElement GetXml(XmlDocument document)
{
if (ReferenceType == null)
{
throw new CryptographicException("Cryptography_Xml_ReferenceTypeRequired");
}
XmlElement element = document.CreateElement(ReferenceType, "http://www.w3.org/2001/04/xmlenc#");
if (!string.IsNullOrEmpty(Uri))
{
element.SetAttribute("URI", Uri);
}
if (TransformChain.Count > 0)
{
element.AppendChild((XmlNode)TransformChain.GetXml(document, "http://www.w3.org/2001/04/xmlenc#"));
}
return(element);
}
/// <summary>Initializes a new instance of the <see cref="T:System.Security.Cryptography.Xml.CipherReference" /> class using the specified Uniform Resource Identifier (URI) and transform chain information.</summary>
/// <param name="uri">A Uniform Resource Identifier (URI) pointing to the encrypted data.</param>
/// <param name="transformChain">A <see cref="T:System.Security.Cryptography.Xml.TransformChain" /> object that describes transforms to do on the encrypted data.</param>
public CipherReference(string uri, TransformChain transformChain)
: base(uri, transformChain)
{
ReferenceType = nameof(CipherReference);
}
/// <summary>Initializes a new instance of the <see cref="T:System.Security.Cryptography.Xml.EncryptedReference" /> class using the specified Uniform Resource Identifier (URI) and transform chain.</summary>
/// <param name="uri">The Uniform Resource Identifier (URI) that points to the data to encrypt.</param>
/// <param name="transformChain">A <see cref="T:System.Security.Cryptography.Xml.TransformChain" /> object that describes transforms to be done on the data to encrypt.</param>
/// <exception cref="T:System.ArgumentNullException">The <paramref name="uri" /> parameter is <see langword="null" />.</exception>
protected EncryptedReference(string uri, TransformChain transformChain)
{
this.TransformChain = transformChain;
this.Uri = uri;
this.m_cachedXml = (XmlElement)null;
}
