mcs/class/System.Security/System.Security.Cryptography.Xml/XmlSignature.cs

   1 //
   2 // XmlSignature.cs: Handles Xml Signature
   3 //
   4 // Author:
   5 //      Sebastien Pouliot (spouliot@motus.com)
   6 //      Atsushi Enomoto (atsushi@ximian.com)
   7 //
   8 // (C) 2003 Motus Technologies Inc. (http://www.motus.com)
   9 // (C) 2004 Novell Inc.
  10 //
  11
  12 using System;
  13 using System.Collections;
  14 using System.Xml;
  15
  16 namespace System.Security.Cryptography.Xml {
  17
  18         // following the design of WSE
  19         internal class XmlSignature {
  20
  21                 public class ElementNames {
  22
  23                         public const string CanonicalizationMethod = "CanonicalizationMethod";
  24                         public const string DigestMethod = "DigestMethod";
  25                         public const string DigestValue = "DigestValue";
  26                         public const string DSAKeyValue = "DSAKeyValue";
  27                         public const string HMACOutputLength = "HMACOutputLength";
  28                         public const string KeyInfo = "KeyInfo";
  29                         public const string KeyName = "KeyName";
  30                         public const string KeyValue = "KeyValue";
  31                         public const string Object = "Object";
  32                         public const string Reference = "Reference";
  33 #if NET_1_0
  34                         // RetrievalMethod vs RetrievalElement -> BUG in MS Framework 1.0
  35                         public const string RetrievalMethod = "RetrievalElement";
  36 #else
  37                         public const string RetrievalMethod = "RetrievalMethod";
  38 #endif
  39                         public const string RSAKeyValue = "RSAKeyValue";
  40                         public const string Signature = "Signature";
  41                         public const string SignatureMethod = "SignatureMethod";
  42                         public const string SignatureValue = "SignatureValue";
  43                         public const string SignedInfo = "SignedInfo";
  44                         public const string Transform = "Transform";
  45                         public const string Transforms = "Transforms";
  46                         public const string X509Data = "X509Data";
  47                         public const string X509IssuerSerial = "X509IssuerSerial";
  48                         public const string X509IssuerName = "X509IssuerName";
  49                         public const string X509SerialNumber = "X509SerialNumber";
  50                         public const string X509SKI = "X509SKI";
  51                         public const string X509SubjectName = "X509SubjectName";
  52                         public const string X509Certificate = "X509Certificate";
  53                         public const string X509CRL = "X509CRL";
  54
  55                         public ElementNames () {}
  56                 }
  57
  58                 public class AttributeNames {
  59
  60                         public const string Algorithm = "Algorithm";
  61                         public const string Encoding = "Encoding";
  62                         public const string Id = "Id";
  63                         public const string MimeType = "MimeType";
  64                         public const string Type = "Type";
  65                         public const string URI = "URI";
  66
  67                         public AttributeNames () {}
  68                 }
  69
  70                 public class AlgorithmNamespaces {
  71                         public const string XmlDsigBase64Transform = "http://www.w3.org/2000/09/xmldsig#base64";
  72                         public const string XmlDsigC14NTransform = "http://www.w3.org/TR/2001/REC-xml-c14n-20010315";
  73                         public const string XmlDsigC14NWithCommentsTransform = "http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments";
  74                         public const string XmlDsigEnvelopedSignatureTransform = "http://www.w3.org/2000/09/xmldsig#enveloped-signature";
  75                         public const string XmlDsigXPathTransform = "http://www.w3.org/TR/1999/REC-xpath-19991116";
  76                         public const string XmlDsigXsltTransform =  "http://www.w3.org/TR/1999/REC-xslt-19991116";
  77                 }
  78
  79                 public const string NamespaceURI = "http://www.w3.org/2000/09/xmldsig#";
  80                 public const string Prefix = "ds";
  81
  82                 public XmlSignature ()
  83                 {
  84                 }
  85
  86                 public static XmlElement GetChildElement (XmlElement xel, string element, string ns)
  87                 {
  88                         for (int i = 0; i < xel.ChildNodes.Count; i++) {
  89                                 XmlNode n = xel.ChildNodes [i];
  90                                 if (n.NodeType == XmlNodeType.Element && n.LocalName == element && n.NamespaceURI == ns)
  91                                         return n as XmlElement;
  92                         }
  93                         return null;
  94                 }
  95
  96                 public static string GetAttributeFromElement (XmlElement xel, string attribute, string element)
  97                 {
  98                         XmlElement el = GetChildElement (xel, element, XmlSignature.NamespaceURI);
  99                         return el != null ? el.GetAttribute (attribute) : null;
 100                 }
 101
 102                 public static XmlElement [] GetChildElements (XmlElement xel, string element)
 103                 {
 104                         ArrayList al = new ArrayList ();
 105                         for (int i = 0; i < xel.ChildNodes.Count; i++) {
 106                                 XmlNode n = xel.ChildNodes [i];
 107                                 if (n.NodeType == XmlNodeType.Element && n.LocalName == element && n.NamespaceURI == XmlSignature.NamespaceURI)
 108                                         al.Add (n);
 109                         }
 110                         return al.ToArray (typeof (XmlElement)) as XmlElement [];
 111                 }
 112         }
 113 }