SignatureDescription.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FXUpdate3074 / FXUpdate3074 / 1.1 / untmp / whidbey / QFE / ndp / clr / src / BCL / System / Security / Cryptography / SignatureDescription.cs / 1 / SignatureDescription.cs
                        

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

// 
// SignatureDescription.cs 
//
 
namespace System.Security.Cryptography {
    using System.Security.Util;

[System.Runtime.InteropServices.ComVisible(true)] 
    public class SignatureDescription {
        private String _strKey; 
        private String _strDigest; 
        private String _strFormatter;
        private String _strDeformatter; 

        //
        // public constructors
        // 

        public SignatureDescription() { 
        } 

        public SignatureDescription(SecurityElement el) { 
            if (el == null) throw new ArgumentNullException("el");
            _strKey = el.SearchForTextOfTag("Key");
            _strDigest = el.SearchForTextOfTag("Digest");
            _strFormatter = el.SearchForTextOfTag("Formatter"); 
            _strDeformatter = el.SearchForTextOfTag("Deformatter");
        } 
 
        //
        // property methods 
        //

        public String KeyAlgorithm {
            get { return _strKey; } 
            set { _strKey = value; }
        } 
        public String DigestAlgorithm { 
            get { return _strDigest; }
            set { _strDigest = value; } 
        }
        public String FormatterAlgorithm {
            get { return _strFormatter; }
            set { _strFormatter = value; } 
        }
        public String DeformatterAlgorithm { 
            get {return _strDeformatter; } 
            set {_strDeformatter = value; }
        } 

        //
        // public methods
        // 

        public virtual AsymmetricSignatureDeformatter CreateDeformatter(AsymmetricAlgorithm key) { 
            AsymmetricSignatureDeformatter     item; 

            item = (AsymmetricSignatureDeformatter) CryptoConfig.CreateFromName(_strDeformatter); 
            item.SetKey(key);
            return item;
        }
 
        public virtual AsymmetricSignatureFormatter CreateFormatter(AsymmetricAlgorithm key) {
            AsymmetricSignatureFormatter     item; 
 
            item = (AsymmetricSignatureFormatter) CryptoConfig.CreateFromName(_strFormatter);
            item.SetKey(key); 
            return item;
        }

        public virtual HashAlgorithm CreateDigest() { 
            return (HashAlgorithm) CryptoConfig.CreateFromName(_strDigest);
        } 
    } 

    internal class RSAPKCS1SHA1SignatureDescription : SignatureDescription { 
        public RSAPKCS1SHA1SignatureDescription() {
            KeyAlgorithm = "System.Security.Cryptography.RSACryptoServiceProvider";
            DigestAlgorithm = "System.Security.Cryptography.SHA1CryptoServiceProvider";
            FormatterAlgorithm = "System.Security.Cryptography.RSAPKCS1SignatureFormatter"; 
            DeformatterAlgorithm = "System.Security.Cryptography.RSAPKCS1SignatureDeformatter";
        } 
 
        public override AsymmetricSignatureDeformatter CreateDeformatter(AsymmetricAlgorithm key) {
            AsymmetricSignatureDeformatter item = (AsymmetricSignatureDeformatter) CryptoConfig.CreateFromName(DeformatterAlgorithm); 
            item.SetKey(key);
            item.SetHashAlgorithm("SHA1");
            return item;
        } 
    }
 
    internal class DSASignatureDescription : SignatureDescription { 
        public DSASignatureDescription() {
            KeyAlgorithm = "System.Security.Cryptography.DSACryptoServiceProvider"; 
            DigestAlgorithm = "System.Security.Cryptography.SHA1CryptoServiceProvider";
            FormatterAlgorithm = "System.Security.Cryptography.DSASignatureFormatter";
            DeformatterAlgorithm = "System.Security.Cryptography.DSASignatureDeformatter";
        } 
    }
} 

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

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