Signature.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / clr / src / ManagedLibraries / Security / System / Security / Cryptography / Xml / Signature.cs / 5 / Signature.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 

// 
// Signature.cs 
//
// 21 [....] 2000 
//

namespace System.Security.Cryptography.Xml
{ 
    using System;
    using System.Collections; 
    using System.Xml; 

    [System.Security.Permissions.HostProtection(MayLeakOnAbort = true)] 
    public class Signature {
        private string m_id;
        private SignedInfo m_signedInfo;
        private byte[] m_signatureValue; 
        private string m_signatureValueId;
        private KeyInfo m_keyInfo; 
        private IList m_embeddedObjects; 
        private CanonicalXmlNodeList m_referencedItems;
        private SignedXml m_signedXml = null; 

        internal SignedXml SignedXml {
            get { return m_signedXml; }
            set { m_signedXml = value; } 
        }
 
        // 
        // public constructors
        // 

        public Signature() {
            m_embeddedObjects = new ArrayList();
            m_referencedItems = new CanonicalXmlNodeList(); 
        }
 
        // 
        // public properties
        // 

        public string Id {
            get { return m_id; }
            set { m_id = value; } 
        }
 
        public SignedInfo SignedInfo { 
            get { return m_signedInfo; }
            set { 
                m_signedInfo = value;
                if (this.SignedXml != null && m_signedInfo != null)
                    m_signedInfo.SignedXml = this.SignedXml;
            } 
        }
 
        public byte[] SignatureValue { 
            get { return m_signatureValue; }
            set { m_signatureValue = value; } 
        }

        public KeyInfo KeyInfo {
            get { 
                if (m_keyInfo == null)
                    m_keyInfo = new KeyInfo(); 
                return m_keyInfo; 
            }
            set { m_keyInfo = value; } 
        }

        public IList ObjectList {
            get { return m_embeddedObjects; } 
            set { m_embeddedObjects = value; }
        } 
 
        internal CanonicalXmlNodeList ReferencedItems {
            get { return m_referencedItems; } 
        }

        //
        // public methods 
        //
 
        public XmlElement GetXml() { 
            XmlDocument document = new XmlDocument();
            document.PreserveWhitespace = true; 
            return GetXml(document);
        }

        internal XmlElement GetXml (XmlDocument document) { 
            // Create the Signature
            XmlElement signatureElement = (XmlElement)document.CreateElement("Signature", SignedXml.XmlDsigNamespaceUrl); 
            if (!String.IsNullOrEmpty(m_id)) 
                signatureElement.SetAttribute("Id", m_id);
 
            // Add the SignedInfo
            if (m_signedInfo == null)
                throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_SignedInfoRequired"));
 
            signatureElement.AppendChild(m_signedInfo.GetXml(document));
 
            // Add the SignatureValue 
            if (m_signatureValue == null)
                throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_SignatureValueRequired")); 

            XmlElement signatureValueElement = document.CreateElement("SignatureValue", SignedXml.XmlDsigNamespaceUrl);
            signatureValueElement.AppendChild(document.CreateTextNode(Convert.ToBase64String(m_signatureValue)));
            if (!String.IsNullOrEmpty(m_signatureValueId)) 
                signatureValueElement.SetAttribute("Id", m_signatureValueId);
            signatureElement.AppendChild(signatureValueElement); 
 
            // Add the KeyInfo
            if (this.KeyInfo.Count > 0) 
                signatureElement.AppendChild(this.KeyInfo.GetXml(document));

            // Add the Objects
            foreach (Object obj in m_embeddedObjects) { 
                DataObject dataObj = obj as DataObject;
                if (dataObj != null) { 
                    signatureElement.AppendChild(dataObj.GetXml(document)); 
                }
            } 

            return signatureElement;
        }
 
        public void LoadXml(XmlElement value) {
             // Make sure we don't get passed null 
            if (value == null) 
                throw new ArgumentNullException("value");
 
            // Signature
            XmlElement signatureElement = value;
            if (!signatureElement.LocalName.Equals("Signature"))
                throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_InvalidElement"), "Signature"); 

            // Id attribute -- optional 
            m_id = Utils.GetAttribute(signatureElement, "Id", SignedXml.XmlDsigNamespaceUrl); 

            XmlNamespaceManager nsm = new XmlNamespaceManager(value.OwnerDocument.NameTable); 
            nsm.AddNamespace("ds", SignedXml.XmlDsigNamespaceUrl);

            // SignedInfo
            XmlElement signedInfoElement = signatureElement.SelectSingleNode("ds:SignedInfo", nsm) as XmlElement; 
            if (signedInfoElement == null)
              throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_InvalidElement"),"SignedInfo"); 
 
            this.SignedInfo = new SignedInfo();
            this.SignedInfo.LoadXml(signedInfoElement); 

            // SignatureValue
            XmlElement signatureValueElement = signatureElement.SelectSingleNode("ds:SignatureValue", nsm) as XmlElement;
            if (signatureValueElement == null) 
                throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_InvalidElement"),"SignedInfo/SignatureValue");
            m_signatureValue = Convert.FromBase64String(Utils.DiscardWhiteSpaces(signatureValueElement.InnerText)); 
            m_signatureValueId = Utils.GetAttribute(signatureValueElement, "Id", SignedXml.XmlDsigNamespaceUrl); 

            XmlNodeList keyInfoNodes = signatureElement.SelectNodes("ds:KeyInfo", nsm); 
            m_keyInfo = new KeyInfo();
            if (keyInfoNodes != null) {
                foreach(XmlNode node in keyInfoNodes) {
                    XmlElement keyInfoElement = node as XmlElement; 
                    if (keyInfoElement != null)
                        m_keyInfo.LoadXml(keyInfoElement); 
                } 
            }
 
            XmlNodeList objectNodes = signatureElement.SelectNodes("ds:Object", nsm);
            m_embeddedObjects.Clear();
            if (objectNodes != null) {
                foreach(XmlNode node in objectNodes) { 
                    XmlElement objectElement = node as XmlElement;
                    if (objectElement != null) { 
                        DataObject dataObj = new DataObject(); 
                        dataObj.LoadXml(objectElement);
                        m_embeddedObjects.Add(dataObj); 
                    }
                }
            }
 
            // Select all elements that have Id attributes
            XmlNodeList nodeList = signatureElement.SelectNodes("//*[@Id]", nsm); 
            if (nodeList != null) { 
                foreach (XmlNode node in nodeList) {
                    m_referencedItems.Add(node); 
                }
            }
        }
 
        public void AddObject(DataObject dataObject) {
            m_embeddedObjects.Add(dataObject); 
        } 
    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 

// 
// Signature.cs 
//
// 21 [....] 2000 
//

namespace System.Security.Cryptography.Xml
{ 
    using System;
    using System.Collections; 
    using System.Xml; 

    [System.Security.Permissions.HostProtection(MayLeakOnAbort = true)] 
    public class Signature {
        private string m_id;
        private SignedInfo m_signedInfo;
        private byte[] m_signatureValue; 
        private string m_signatureValueId;
        private KeyInfo m_keyInfo; 
        private IList m_embeddedObjects; 
        private CanonicalXmlNodeList m_referencedItems;
        private SignedXml m_signedXml = null; 

        internal SignedXml SignedXml {
            get { return m_signedXml; }
            set { m_signedXml = value; } 
        }
 
        // 
        // public constructors
        // 

        public Signature() {
            m_embeddedObjects = new ArrayList();
            m_referencedItems = new CanonicalXmlNodeList(); 
        }
 
        // 
        // public properties
        // 

        public string Id {
            get { return m_id; }
            set { m_id = value; } 
        }
 
        public SignedInfo SignedInfo { 
            get { return m_signedInfo; }
            set { 
                m_signedInfo = value;
                if (this.SignedXml != null && m_signedInfo != null)
                    m_signedInfo.SignedXml = this.SignedXml;
            } 
        }
 
        public byte[] SignatureValue { 
            get { return m_signatureValue; }
            set { m_signatureValue = value; } 
        }

        public KeyInfo KeyInfo {
            get { 
                if (m_keyInfo == null)
                    m_keyInfo = new KeyInfo(); 
                return m_keyInfo; 
            }
            set { m_keyInfo = value; } 
        }

        public IList ObjectList {
            get { return m_embeddedObjects; } 
            set { m_embeddedObjects = value; }
        } 
 
        internal CanonicalXmlNodeList ReferencedItems {
            get { return m_referencedItems; } 
        }

        //
        // public methods 
        //
 
        public XmlElement GetXml() { 
            XmlDocument document = new XmlDocument();
            document.PreserveWhitespace = true; 
            return GetXml(document);
        }

        internal XmlElement GetXml (XmlDocument document) { 
            // Create the Signature
            XmlElement signatureElement = (XmlElement)document.CreateElement("Signature", SignedXml.XmlDsigNamespaceUrl); 
            if (!String.IsNullOrEmpty(m_id)) 
                signatureElement.SetAttribute("Id", m_id);
 
            // Add the SignedInfo
            if (m_signedInfo == null)
                throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_SignedInfoRequired"));
 
            signatureElement.AppendChild(m_signedInfo.GetXml(document));
 
            // Add the SignatureValue 
            if (m_signatureValue == null)
                throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_SignatureValueRequired")); 

            XmlElement signatureValueElement = document.CreateElement("SignatureValue", SignedXml.XmlDsigNamespaceUrl);
            signatureValueElement.AppendChild(document.CreateTextNode(Convert.ToBase64String(m_signatureValue)));
            if (!String.IsNullOrEmpty(m_signatureValueId)) 
                signatureValueElement.SetAttribute("Id", m_signatureValueId);
            signatureElement.AppendChild(signatureValueElement); 
 
            // Add the KeyInfo
            if (this.KeyInfo.Count > 0) 
                signatureElement.AppendChild(this.KeyInfo.GetXml(document));

            // Add the Objects
            foreach (Object obj in m_embeddedObjects) { 
                DataObject dataObj = obj as DataObject;
                if (dataObj != null) { 
                    signatureElement.AppendChild(dataObj.GetXml(document)); 
                }
            } 

            return signatureElement;
        }
 
        public void LoadXml(XmlElement value) {
             // Make sure we don't get passed null 
            if (value == null) 
                throw new ArgumentNullException("value");
 
            // Signature
            XmlElement signatureElement = value;
            if (!signatureElement.LocalName.Equals("Signature"))
                throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_InvalidElement"), "Signature"); 

            // Id attribute -- optional 
            m_id = Utils.GetAttribute(signatureElement, "Id", SignedXml.XmlDsigNamespaceUrl); 

            XmlNamespaceManager nsm = new XmlNamespaceManager(value.OwnerDocument.NameTable); 
            nsm.AddNamespace("ds", SignedXml.XmlDsigNamespaceUrl);

            // SignedInfo
            XmlElement signedInfoElement = signatureElement.SelectSingleNode("ds:SignedInfo", nsm) as XmlElement; 
            if (signedInfoElement == null)
              throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_InvalidElement"),"SignedInfo"); 
 
            this.SignedInfo = new SignedInfo();
            this.SignedInfo.LoadXml(signedInfoElement); 

            // SignatureValue
            XmlElement signatureValueElement = signatureElement.SelectSingleNode("ds:SignatureValue", nsm) as XmlElement;
            if (signatureValueElement == null) 
                throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Xml_InvalidElement"),"SignedInfo/SignatureValue");
            m_signatureValue = Convert.FromBase64String(Utils.DiscardWhiteSpaces(signatureValueElement.InnerText)); 
            m_signatureValueId = Utils.GetAttribute(signatureValueElement, "Id", SignedXml.XmlDsigNamespaceUrl); 

            XmlNodeList keyInfoNodes = signatureElement.SelectNodes("ds:KeyInfo", nsm); 
            m_keyInfo = new KeyInfo();
            if (keyInfoNodes != null) {
                foreach(XmlNode node in keyInfoNodes) {
                    XmlElement keyInfoElement = node as XmlElement; 
                    if (keyInfoElement != null)
                        m_keyInfo.LoadXml(keyInfoElement); 
                } 
            }
 
            XmlNodeList objectNodes = signatureElement.SelectNodes("ds:Object", nsm);
            m_embeddedObjects.Clear();
            if (objectNodes != null) {
                foreach(XmlNode node in objectNodes) { 
                    XmlElement objectElement = node as XmlElement;
                    if (objectElement != null) { 
                        DataObject dataObj = new DataObject(); 
                        dataObj.LoadXml(objectElement);
                        m_embeddedObjects.Add(dataObj); 
                    }
                }
            }
 
            // Select all elements that have Id attributes
            XmlNodeList nodeList = signatureElement.SelectNodes("//*[@Id]", nsm); 
            if (nodeList != null) { 
                foreach (XmlNode node in nodeList) {
                    m_referencedItems.Add(node); 
                }
            }
        }
 
        public void AddObject(DataObject dataObject) {
            m_embeddedObjects.Add(dataObject); 
        } 
    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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