RoamingStoreFile.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / infocard / Service / managed / Microsoft / InfoCards / RoamingStoreFile.cs / 1 / RoamingStoreFile.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------
namespace Microsoft.InfoCards
{ 
    using System;
    using System.Collections.Generic; 
    using System.Text; 
    using System.Xml;
    using System.Xml.Serialization; 
    using System.IO;
    using System.Security.Cryptography.X509Certificates;

    using IDT = Microsoft.InfoCards.Diagnostics.InfoCardTrace; 

 
    // 
    // Summary:
    //  Reads and writes the Roaming store xml file format. 
    //
    internal sealed class RoamingStoreFile
    {
        List m_infocards; 

        public RoamingStoreFile( ) 
        { 
            m_infocards = new List( );
        } 

        //
        // Summary:
        //  Get the list of cards that will be written or were read. 
        //
        public IList Cards 
        { 
            get { return m_infocards; }
        } 

        public void Clear()
        {
            foreach( InfoCard icard in m_infocards ) 
            {
                icard.ClearSensitiveData(); 
            } 
            m_infocards.Clear();
        } 

        //
        // Summary:
        //  Encrypts and writes the data to the specified xml writer. 
        //
        public void WriteTo( string password, XmlWriter writer ) 
        { 
            byte[] cipherValue = null;
            byte[] newSalt = null; 
            using( MemoryStream tempStream = new MemoryStream( ) )
            {
                XmlWriterSettings settings = new XmlWriterSettings( );
                settings.OmitXmlDeclaration = true; 
                settings.CloseOutput = false;
                settings.Encoding = Encoding.UTF8; 
 
                using( XmlWriter eltWriter = XmlWriter.Create( tempStream, settings ) )
                { 
                    eltWriter.WriteStartElement( XmlNames.WSIdentity.RoamingStoreElement, XmlNames.WSIdentity.Namespace );
                    foreach( InfoCard serialzable in m_infocards )
                    {
                        serialzable.WriteXml( eltWriter ); 
                    }
                    eltWriter.WriteEndElement( ); 
                    eltWriter.Flush(); 
                }
                tempStream.Flush( ); 
                tempStream.Seek( 0, SeekOrigin.Begin );

                cipherValue = new byte[ RoamingStoreFileUtility.CalculateEncryptedSize( Convert.ToInt32( tempStream.Length ) ) ];
                using( MemoryStream encryptedStream = new MemoryStream( cipherValue ) ) 
                {
                    RoamingStoreFileUtility.Encrypt( 
                                                tempStream, 
                                                encryptedStream,
                                                password, 
                                                out newSalt );
                    encryptedStream.Flush( );
                }
            } 

            writer.WriteStartElement( XmlNames.WSIdentity.EncryptedStoreElement, XmlNames.WSIdentity.Namespace ); 
            writer.WriteStartElement( XmlNames.WSIdentity.StoreSaltElement, XmlNames.WSIdentity.Namespace ); 
            writer.WriteBase64( newSalt, 0, newSalt.Length );
            writer.WriteEndElement( ); 
            writer.WriteStartElement( XmlNames.XmlEnc.EncryptedData,XmlNames.XmlEnc.Namespace );
            writer.WriteStartElement( XmlNames.XmlEnc.CipherData,XmlNames.XmlEnc.Namespace );
            writer.WriteStartElement( XmlNames.XmlEnc.CipherValue,XmlNames.XmlEnc.Namespace );
            writer.WriteBase64( cipherValue, 0, cipherValue.Length ); 
            writer.WriteEndElement( );
            writer.WriteEndElement( ); 
            writer.WriteEndElement( ); 
            writer.WriteEndElement( );
        } 

        //
        // Summary:
        //  Reads and decrypts the xml stream using the specified password. 
        //
        public void ReadFrom( string password, XmlReader reader ) 
        { 

            if( !reader.IsStartElement( XmlNames.WSIdentity.EncryptedStoreElement, XmlNames.WSIdentity.Namespace ) ) 
            {
                throw IDT.ThrowHelperError(
                    new ImportException( SR.GetString( SR.InvalidImportFile ) ) );
            } 

            if( !reader.ReadToDescendant( XmlNames.WSIdentity.StoreSaltElement, XmlNames.WSIdentity.Namespace ) ) 
            { 
                throw IDT.ThrowHelperError(
                    new ImportException( SR.GetString( SR.InvalidImportFile ) ) ); 
            }

            byte[] salt = new byte[ RoamingStoreFileUtility.SaltLength ];
            reader.ReadElementContentAsBase64( salt, 0, salt.Length ); 
            if( 0 != reader.ReadElementContentAsBase64( new byte[ 1 ], 0, 1 ) )
            { 
                throw IDT.ThrowHelperError( 
                    new ImportException( SR.GetString( SR.InvalidImportFile ) ) );
            } 

            if( !reader.IsStartElement( XmlNames.XmlEnc.EncryptedData,XmlNames.XmlEnc.Namespace ) )
            {
                throw IDT.ThrowHelperError( 
                    new ImportException( SR.GetString( SR.InvalidImportFile )) );
            } 
            if( !reader.ReadToDescendant( XmlNames.XmlEnc.CipherData,XmlNames.XmlEnc.Namespace ) ) 
            {
                throw IDT.ThrowHelperError( 
                    new ImportException( SR.GetString( SR.InvalidImportFile )) );
            }

            if( !reader.ReadToDescendant( XmlNames.XmlEnc.CipherValue,XmlNames.XmlEnc.Namespace ) ) 
            {
                throw IDT.ThrowHelperError( 
                    new ImportException( SR.GetString( SR.InvalidImportFile ) ) ); 
            }
 
            using( MemoryStream encrypted = new MemoryStream( 4096 ) )
            {
                byte[] block = new byte[ 1024 ];
                int bytesRead = 0; 

                while( ( bytesRead = reader.ReadElementContentAsBase64( block, 0, block.Length ) ) > 0 ) 
                { 
                    encrypted.Write( block, 0, bytesRead );
                } 
                encrypted.Flush( );
                encrypted.Seek( 0, SeekOrigin.Begin );

 
                using( MemoryStream decrypted = new MemoryStream( RoamingStoreFileUtility.CalculateDecryptedSize(Convert.ToInt32(encrypted.Length)) ) )
                { 
                    RoamingStoreFileUtility.Decrypt( 
                                            encrypted,
                                            decrypted, 
                                            password,
                                            salt );

                    decrypted.Flush( ); 
                    decrypted.Seek( 0, SeekOrigin.Begin );
 
 
                    using( XmlReader decryptedReader = InfoCardSchemas.CreateReader( decrypted, reader.Settings ) )
                    { 
                        decryptedReader.Read( );
                        if( !decryptedReader.IsStartElement( XmlNames.WSIdentity.RoamingStoreElement, XmlNames.WSIdentity.Namespace ) )
                        {
                            throw IDT.ThrowHelperError( 
                                        new ImportException( SR.GetString( SR.InvalidImportFile ) ) );
                        } 
                        if( decryptedReader.ReadToDescendant( XmlNames.WSIdentity.RoamingInfoCardElement, XmlNames.WSIdentity.Namespace ) ) 
                        {
                            do 
                            {
                                InfoCard card = new InfoCard();
                                card.ReadXml( decryptedReader );
                                m_infocards.Add(card); 
                                decryptedReader.ReadEndElement( );
                            } while( decryptedReader.IsStartElement( XmlNames.WSIdentity.RoamingInfoCardElement, XmlNames.WSIdentity.Namespace ) ); 
                        } 
                        decryptedReader.ReadEndElement( );//RoamingStore
                    } 
                }
            }
            reader.ReadEndElement( );//CipherData
 
            //
            // Skip optional encryption properties element. 
            // 
            if( reader.IsStartElement( XmlNames.XmlEnc.EncryptionProperties, XmlNames.XmlEnc.Namespace ) )
            { 
                reader.Skip();
            }

            reader.ReadEndElement( );//EncryptedData 
            reader.ReadEndElement( );//EncryptedStore
 
        } 

    } 
}

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

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