Pkcs9Attribute.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / ManagedLibraries / Security / System / Security / Cryptography / Pkcs / Pkcs9Attribute.cs / 1305376 / Pkcs9Attribute.cs
                        
                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 

// 
// Pkcs9Attribute.cs 
//
 
namespace System.Security.Cryptography.Pkcs {
    using System.Collections;
    using System.Diagnostics;
    using System.Globalization; 
    using System.Runtime.InteropServices;
    using System.Security.Cryptography; 
    using System.Security.Cryptography.X509Certificates; 
    using System.Text;
 
    [System.Security.Permissions.HostProtection(MayLeakOnAbort = true)]
    public class Pkcs9AttributeObject : AsnEncodedData {
        //
        // Constructors. 
        //
 
        internal Pkcs9AttributeObject (string oid) { 
            base.Oid = new Oid(oid);
        } 

        public Pkcs9AttributeObject () : base () {}

        public Pkcs9AttributeObject (string oid, byte[] encodedData) : this(new AsnEncodedData(oid, encodedData)) {} 

        public Pkcs9AttributeObject (Oid oid, byte[] encodedData) : this(new AsnEncodedData(oid, encodedData)) {} 
 
        public Pkcs9AttributeObject (AsnEncodedData asnEncodedData) : base (asnEncodedData) {
            if (asnEncodedData.Oid == null) 
                throw new ArgumentNullException("asnEncodedData.Oid");
            string szOid = base.Oid.Value;
            if (szOid == null)
                throw new ArgumentNullException("oid.Value"); 
            if (szOid.Length == 0)
                throw new ArgumentException(SecurityResources.GetResourceString("Arg_EmptyOrNullString"), "oid.Value"); 
        } 

        // 
        // Public properties.
        //

        public new Oid Oid { 
            get {
                return base.Oid; 
            } 
        }
 
        public override void CopyFrom (AsnEncodedData asnEncodedData) {
            if (asnEncodedData == null)
                throw new ArgumentNullException("asnEncodedData");
            Pkcs9AttributeObject att = asnEncodedData as Pkcs9AttributeObject; 
            if (att == null)
                throw new ArgumentException(SecurityResources.GetResourceString("Cryptography_Pkcs9_AttributeMismatch")); 
            base.CopyFrom(asnEncodedData); 
        }
    } 

    [System.Security.Permissions.HostProtection(MayLeakOnAbort = true)]
    public sealed class Pkcs9SigningTime : Pkcs9AttributeObject {
        private DateTime m_signingTime; 
        private bool m_decoded = false;
 
        // 
        // Constructors.
        // 

        public Pkcs9SigningTime() : this(DateTime.Now) {}

        public Pkcs9SigningTime(DateTime signingTime) : base(CAPI.szOID_RSA_signingTime, Encode(signingTime)) { 
            m_signingTime = signingTime;
            m_decoded = true; 
        } 

        public Pkcs9SigningTime(byte[] encodedSigningTime) : base(CAPI.szOID_RSA_signingTime, encodedSigningTime) {} 

        //
        // Public properties.
        // 

        public DateTime SigningTime { 
            get { 
                if (!m_decoded && (null != RawData))
                    Decode(); 
                return m_signingTime;
            }
        }
 
        public override void CopyFrom (AsnEncodedData asnEncodedData) {
            base.CopyFrom(asnEncodedData); 
            m_decoded = false; 
        }
 
        //
        // Private methods.
        //
 
        [System.Security.SecuritySafeCritical]
        private void Decode() { 
            uint cbDecoded = 0; 
            SafeLocalAllocHandle pbDecoded = null;
 
            if (!CAPI.DecodeObject(new IntPtr(CAPI.PKCS_UTC_TIME),
                                   RawData,
                                   out pbDecoded,
                                   out cbDecoded)) { 
                throw new CryptographicException(Marshal.GetLastWin32Error());
            } 
 
            long signingTime = Marshal.ReadInt64(pbDecoded.DangerousGetHandle());
            pbDecoded.Dispose(); 

            m_signingTime = DateTime.FromFileTimeUtc(signingTime);
            m_decoded = true;
        } 

        [System.Security.SecuritySafeCritical] 
        private static byte[] Encode (DateTime signingTime) { 
            long ft = signingTime.ToFileTimeUtc();
            SafeLocalAllocHandle pbSigningTime = CAPI.LocalAlloc(CAPI.LPTR, new IntPtr(Marshal.SizeOf(typeof(Int64)))); 
            Marshal.WriteInt64(pbSigningTime.DangerousGetHandle(), ft);

            byte[] encodedSigningTime = new byte[0];
            if (!CAPI.EncodeObject(CAPI.szOID_RSA_signingTime, pbSigningTime.DangerousGetHandle(), out encodedSigningTime)) 
                throw new CryptographicException(Marshal.GetLastWin32Error());
 
            pbSigningTime.Dispose(); 

            return encodedSigningTime; 
        }
    }

    [System.Security.Permissions.HostProtection(MayLeakOnAbort = true)] 
    public sealed class Pkcs9DocumentName : Pkcs9AttributeObject {
        private string m_documentName = null; 
        private bool m_decoded = false; 

        // 
        // Constructors.
        //

        public Pkcs9DocumentName () : base (CAPI.szOID_CAPICOM_documentName) {} 

        public Pkcs9DocumentName (string documentName) : 
            base(CAPI.szOID_CAPICOM_documentName, Encode(documentName)) { 
            m_documentName = documentName;
            m_decoded = true; 
        }

        public Pkcs9DocumentName (byte[] encodedDocumentName) :
            base(CAPI.szOID_CAPICOM_documentName, encodedDocumentName) {} 

        // 
        // Public methods. 
        //
 
        public string DocumentName {
            get {
                if (!m_decoded && (null != RawData))
                    Decode(); 
                return m_documentName;
            } 
        } 

        public override void CopyFrom (AsnEncodedData asnEncodedData) { 
            base.CopyFrom(asnEncodedData);
            m_decoded = false;
        }
 
        //
        // Private methods. 
        // 

        private void Decode() { 
            m_documentName = PkcsUtils.DecodeOctetString(RawData);
            m_decoded = true;
        }
 
        private static byte[] Encode (string documentName) {
            if (String.IsNullOrEmpty(documentName)) 
                throw new ArgumentNullException("documentName"); 
            return PkcsUtils.EncodeOctetString(documentName);
        } 
    }

    [System.Security.Permissions.HostProtection(MayLeakOnAbort = true)]
    public sealed class Pkcs9DocumentDescription : Pkcs9AttributeObject { 
        private string m_documentDescription = null;
        private bool m_decoded = false; 
 
        //
        // Constructors. 
        //

        public Pkcs9DocumentDescription () : base (CAPI.szOID_CAPICOM_documentDescription) {}
 
        public Pkcs9DocumentDescription(string documentDescription) :
            base(CAPI.szOID_CAPICOM_documentDescription, Encode(documentDescription)) { 
            m_documentDescription = documentDescription; 
            m_decoded = true;
        } 

        public Pkcs9DocumentDescription(byte[] encodedDocumentDescription) :
            base(CAPI.szOID_CAPICOM_documentDescription, encodedDocumentDescription) {}
 
        //
        // Public methods. 
        // 

        public string DocumentDescription { 
            get {
                if (!m_decoded && (null != RawData))
                    Decode();
                return m_documentDescription; 
            }
        } 
 
        public override void CopyFrom (AsnEncodedData asnEncodedData) {
            base.CopyFrom(asnEncodedData); 
            m_decoded = false;
        }

        // 
        // Private methods.
        // 
 
        private void Decode () {
            m_documentDescription = PkcsUtils.DecodeOctetString(RawData); 
            m_decoded = true;
        }

        private static byte[] Encode (string documentDescription) { 
            if (String.IsNullOrEmpty(documentDescription))
                throw new ArgumentNullException("documentDescription"); 
            return PkcsUtils.EncodeOctetString(documentDescription); 
        }
    } 

    [System.Security.Permissions.HostProtection(MayLeakOnAbort = true)]
    public sealed class Pkcs9ContentType : Pkcs9AttributeObject {
        private Oid m_contentType = null; 
        private bool m_decoded = false;
 
        // 
        // Constructors.
        // 

        internal Pkcs9ContentType (byte[] encodedContentType) : base(CAPI.szOID_RSA_contentType, encodedContentType) {}

        public Pkcs9ContentType () : base (CAPI.szOID_RSA_contentType) {} 

        // 
        // Public properties. 
        //
 
        public Oid ContentType {
            get {
                if (!m_decoded && (null != RawData))
                    Decode(); 
                return m_contentType;
            } 
        } 

        public override void CopyFrom (AsnEncodedData asnEncodedData) { 
            base.CopyFrom(asnEncodedData);
            m_decoded = false;
        }
 
        //
        // Private methods. 
        // 

        private void Decode () { 
            if ((RawData.Length < 2) || ((uint) RawData[1] != (uint) (RawData.Length - 2)))
                throw new CryptographicException(CAPI.CRYPT_E_BAD_ENCODE);

            if (RawData[0] != CAPI.ASN_TAG_OBJID) 
                throw new CryptographicException(CAPI.CRYPT_E_ASN1_BADTAG);
 
            m_contentType = new Oid(PkcsUtils.DecodeObjectIdentifier(RawData, 2)); 
            m_decoded = true;
        } 
    }

    [System.Security.Permissions.HostProtection(MayLeakOnAbort = true)]
    public sealed class Pkcs9MessageDigest : Pkcs9AttributeObject { 
        private byte[] m_messageDigest = null;
        private bool m_decoded = false; 
 
        //
        // Constructors. 
        //

        internal Pkcs9MessageDigest (byte[] encodedMessageDigest) : base(CAPI.szOID_RSA_messageDigest, encodedMessageDigest) {}
 
        public Pkcs9MessageDigest () : base (CAPI.szOID_RSA_messageDigest) {}
 
        // 
        // Public properties.
        // 

        public byte[] MessageDigest {
            get {
                if (!m_decoded && (null != RawData)) 
                    Decode();
                return m_messageDigest; 
            } 
        }
 
        public override void CopyFrom (AsnEncodedData asnEncodedData) {
            base.CopyFrom(asnEncodedData);
            m_decoded = false;
        } 

        // 
        // Private methods. 
        //
 
        private void Decode () {
            m_messageDigest = PkcsUtils.DecodeOctetBytes(RawData);
            m_decoded = true;
        } 
    }
} 

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