SignatureDescription.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / Security / Cryptography / SignatureDescription.cs / 1305376 / SignatureDescription.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
// [....]
// 
 
//
// SignatureDescription.cs 
//

namespace System.Security.Cryptography {
    using System.Security.Util; 
    using System.Diagnostics.Contracts;
 
[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"); 
            Contract.EndContractBlock();
            _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 
        //
 
        [System.Security.SecuritySafeCritical]  // auto-generated
        public virtual AsymmetricSignatureDeformatter CreateDeformatter(AsymmetricAlgorithm key) {
            AsymmetricSignatureDeformatter     item;
 
            item = (AsymmetricSignatureDeformatter) CryptoConfig.CreateFromName(_strDeformatter);
            item.SetKey(key); 
            return item; 
        }
 
        [System.Security.SecuritySafeCritical]  // auto-generated
        public virtual AsymmetricSignatureFormatter CreateFormatter(AsymmetricAlgorithm key) {
            AsymmetricSignatureFormatter     item;
 
            item = (AsymmetricSignatureFormatter) CryptoConfig.CreateFromName(_strFormatter);
            item.SetKey(key); 
            return item; 
        }
 
        [System.Security.SecuritySafeCritical]  // auto-generated
        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.

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