2005-01-31 Zoltan Varga <vargaz@freemail.hu>

[mono.git] / mcs / class / Microsoft.Web.Services / Microsoft.Web.Services.Security / EncryptedData.cs

diff --git a/mcs/class/Microsoft.Web.Services/Microsoft.Web.Services.Security/EncryptedData.cs b/mcs/class/Microsoft.Web.Services/Microsoft.Web.Services.Security/EncryptedData.cs
index 05b73772efb1986729cf1e471a43e7dc7fc876ef..2d86410128117a111fbdf03a2df575335784e55f 100644 (file)
--- a/mcs/class/Microsoft.Web.Services/Microsoft.Web.Services.Security/EncryptedData.cs
+++ b/mcs/class/Microsoft.Web.Services/Microsoft.Web.Services.Security/EncryptedData.cs
@@ -70,15 +70,8 @@ namespace Microsoft.Web.Services.Security {
                        }
 #endif
                        type = XmlEncryption.TypeURI.Content;
-/*                     if (reference == null)
-                               type = XmlEncryption.TypeURI.Content;
-                       else if (reference [0] == '#')
-                               type = XmlEncryption.TypeURI.Element;
-                       else
-                               throw new ArgumentException ("reference must start with a #");*/
                }
 
-               [MonoTODO]
                public EncryptedData (XmlElement element, EncryptedKey encryptedKey) 
                {
                        this.encryptedKey = encryptedKey;
@@ -124,15 +117,47 @@ namespace Microsoft.Web.Services.Security {
                        }
                }
 
-               [MonoTODO]
+               [MonoTODO("incomplete - only works for soap:Body")]
                public XmlElement Decrypt ()
                {
                        if (target == null)
                                throw new InvalidOperationException ("no document to decrypt");
-                       DecryptionKey dk = token.DecryptionKey;
-                       if (dk == null)
+                       if ((encryptedKey == null) || (encryptedKey.Key == null))
                                throw new InvalidOperationException ("no key to decrypt with");
-                       return null;
+                       
+                       string algo = null;
+                       XmlNodeList xnl = target.GetElementsByTagName (XmlEncryption.ElementNames.EncryptionMethod, XmlEncryption.NamespaceURI);
+                       if ((xnl != null) && (xnl.Count > 0)) {
+                               XmlAttribute ema = xnl [0].Attributes [XmlEncryption.AttributeNames.Algorithm];
+                               if (ema != null)
+                                       algo = ema.InnerText;
+                       }
+                       if (algo != encryptedKey.SessionAlgorithmURI)
+                               throw new Exception ("TODO ???");
+
+                       byte[] encdata = null;
+                       xnl = target.GetElementsByTagName (XmlEncryption.ElementNames.CipherData, XmlEncryption.NamespaceURI);
+                       if ((xnl != null) && (xnl.Count > 0)) {
+                               XmlElement cd = (XmlElement) xnl [0];
+                               foreach (XmlNode xn in cd.ChildNodes) {
+                                       if ((xn.LocalName == XmlEncryption.ElementNames.CipherValue) && (xn.NamespaceURI == XmlEncryption.NamespaceURI)) {
+                                               encdata = Convert.FromBase64String (xn.InnerText);
+                                       }
+                               }
+                       }
+
+                       // get the IV in front of the encrypted data
+                       int ivLength = encryptedKey.Key.Algorithm.IV.Length;
+                       byte[] iv = new byte [ivLength];
+                       Buffer.BlockCopy (encdata, 0, iv, 0, ivLength);
+                       encryptedKey.Key.Algorithm.IV = iv;
+
+                       ICryptoTransform ct = encryptedKey.Key.Algorithm.CreateDecryptor ();
+                       byte[] decdata = ct.TransformFinalBlock (encdata, ivLength, encdata.Length - ivLength);
+                       string xml = Encoding.UTF8.GetString (decdata);
+                       target.ParentNode.InnerXml = xml;
+
+                       return target;
                }
 
                // copied from SoapEnvelope.cs to avoid creating the object
@@ -228,6 +253,15 @@ namespace Microsoft.Web.Services.Security {
                {
                        if (element == null)
                                throw new ArgumentNullException ("element");
+                       if ((element.LocalName != XmlEncryption.ElementNames.EncryptedData) || (element.NamespaceURI != XmlEncryption.NamespaceURI))
+                               throw new ArgumentException ("invalid LocalName or NamespaceURI");
+
+                       XmlAttribute xa = element.Attributes [XmlEncryption.AttributeNames.Type];
+                       if (xa != null) {
+                               Type = xa.InnerText;
+                       }
+
+                       target = element;
                }
        }
 }