CryptographicAttribute.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 / CryptographicAttribute.cs / 1305376 / CryptographicAttribute.cs
                        
                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
// [....]
// 
 
//
// CryptographicAttributeObject.cs 
//
// 07/10/2003
//
 
namespace System.Security.Cryptography {
    using System.Collections; 
    using System.Globalization; 
    using System.Runtime.InteropServices;
    using System.Security.Cryptography.Pkcs; 

    [System.Security.Permissions.HostProtection(MayLeakOnAbort = true)]
    public sealed class CryptographicAttributeObject {
        private Oid m_oid = null; 
        private AsnEncodedDataCollection m_values = null;
 
        // 
        // Constructors.
        // 

        private CryptographicAttributeObject () {}

        [SecurityCritical] 
        internal CryptographicAttributeObject (IntPtr pAttribute) : this((CAPI.CRYPT_ATTRIBUTE) Marshal.PtrToStructure(pAttribute, typeof(CAPI.CRYPT_ATTRIBUTE))) {}
 
        [SecurityCritical] 
        internal CryptographicAttributeObject (CAPI.CRYPT_ATTRIBUTE cryptAttribute) : this(new Oid(cryptAttribute.pszObjId), PkcsUtils.GetAsnEncodedDataCollection(cryptAttribute)) {}
 
        [SecurityCritical]
        internal CryptographicAttributeObject (CAPI.CRYPT_ATTRIBUTE_TYPE_VALUE cryptAttribute) : this(new Oid(cryptAttribute.pszObjId), PkcsUtils.GetAsnEncodedDataCollection(cryptAttribute)) {}

        internal CryptographicAttributeObject (AsnEncodedData asnEncodedData) : this(asnEncodedData.Oid, new AsnEncodedDataCollection(asnEncodedData)) {} 

        public CryptographicAttributeObject (Oid oid) : this(oid, new AsnEncodedDataCollection()) {} 
 
        public CryptographicAttributeObject (Oid oid, AsnEncodedDataCollection values) {
            m_oid = new Oid(oid); 
            if (values == null)
                m_values = new AsnEncodedDataCollection();
            else {
                foreach (AsnEncodedData asn in values) { 
                    if (0 != String.Compare(asn.Oid.Value, oid.Value, StringComparison.Ordinal))
                        throw new InvalidOperationException(SecurityResources.GetResourceString("InvalidOperation_DuplicateItemNotAllowed")); 
                } 
                m_values = values;
            } 
        }

        //
        // Public properties. 
        //
 
        public Oid Oid { 
            get {
                return new Oid(m_oid); 
            }
        }

        public AsnEncodedDataCollection Values { 
            get {
                return m_values; 
            } 
        }
    } 

    [System.Security.Permissions.HostProtection(MayLeakOnAbort = true)]
    public sealed class CryptographicAttributeObjectCollection : ICollection {
        private ArrayList m_list; 

        public CryptographicAttributeObjectCollection() { 
            m_list = new ArrayList(); 
        }
 
        [SecurityCritical]
        private CryptographicAttributeObjectCollection (IntPtr pCryptAttributes) : this((CAPI.CRYPT_ATTRIBUTES) Marshal.PtrToStructure(pCryptAttributes, typeof(CAPI.CRYPT_ATTRIBUTES))) {}

        [SecurityCritical] 
        internal CryptographicAttributeObjectCollection (SafeLocalAllocHandle pCryptAttributes) : this(pCryptAttributes.DangerousGetHandle()) {}
 
        [SecurityCritical] 
        internal CryptographicAttributeObjectCollection (CAPI.CRYPT_ATTRIBUTES cryptAttributes) {
            m_list = new ArrayList(); 
            for (uint index = 0; index < cryptAttributes.cAttr; index++) {
                IntPtr pCryptAttribute = new IntPtr((long)cryptAttributes.rgAttr + (index * Marshal.SizeOf(typeof(CAPI.CRYPT_ATTRIBUTE))));
                m_list.Add(new CryptographicAttributeObject(pCryptAttribute));
            } 
        }
 
        public CryptographicAttributeObjectCollection (CryptographicAttributeObject attribute) { 
            m_list = new ArrayList();
            m_list.Add(attribute); 
        }

        public int Add (AsnEncodedData asnEncodedData) {
            if (asnEncodedData == null) 
                throw new ArgumentNullException("asnEncodedData");
 
            return Add(new CryptographicAttributeObject(asnEncodedData)); 
        }
 
        public int Add (CryptographicAttributeObject attribute) {
            if (attribute == null)
                throw new ArgumentNullException("attribute");
 
            //
            // Merge with exisitng attribute, if already existed, else add as new. 
            // 

            string szOid1 = null; 
            if (attribute.Oid != null)
                szOid1 = attribute.Oid.Value;

            for (int index = 0; index < m_list.Count; index++) { 
                CryptographicAttributeObject existing = (CryptographicAttributeObject) m_list[index];
 
                // To prevent caller to add the existing item into the collection again 
                // Otherwise the merge will be an infinite loop
                if ((Object) existing.Values == (Object) attribute.Values) 
                    throw new InvalidOperationException(SecurityResources.GetResourceString("InvalidOperation_DuplicateItemNotAllowed"));

                // Merge either:
                // 1. both OIDs are null, or 
                // 2. both not null and OIDs match.
                string szOid2 = null; 
                if (existing.Oid != null) 
                    szOid2 = existing.Oid.Value;
 
                if (szOid1 == null && szOid2 == null) {
                    foreach (AsnEncodedData asnEncodedData in attribute.Values) {
                        existing.Values.Add(asnEncodedData);
                    } 
                    return index;
                } 
 
                if ((szOid1 != null && szOid2 != null) && (String.Compare(szOid1, szOid2, StringComparison.OrdinalIgnoreCase) == 0)) {
                    // 
                    // Only allow one signing time, per RFC.
                    //

                    if (String.Compare(szOid1, CAPI.szOID_RSA_signingTime, StringComparison.OrdinalIgnoreCase) == 0) 
                        throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_Pkcs9_MultipleSigningTimeNotAllowed"));
 
                    foreach (AsnEncodedData asnEncodedData in attribute.Values) { 
                        existing.Values.Add(asnEncodedData);
                    } 
                    return index;
                }
            }
 
            return m_list.Add(attribute);
        } 
 
        public void Remove (CryptographicAttributeObject attribute) {
            if (attribute == null) 
                throw new ArgumentNullException("attribute");

            m_list.Remove(attribute);
        } 

        public CryptographicAttributeObject this[int index] { 
            get { 
                return (CryptographicAttributeObject) m_list[index];
            } 
        }

        public int Count {
            get { 
                return m_list.Count;
            } 
        } 

        public CryptographicAttributeObjectEnumerator GetEnumerator() { 
            return new CryptographicAttributeObjectEnumerator(this);
        }

        ///  
        IEnumerator IEnumerable.GetEnumerator() {
            return new CryptographicAttributeObjectEnumerator(this); 
        } 

        ///  
        void ICollection.CopyTo(Array array, int index) {
            if (array == null)
                throw new ArgumentNullException("array");
            if (array.Rank != 1) 
                throw new ArgumentException(SecurityResources.GetResourceString("Arg_RankMultiDimNotSupported"));
            if (index < 0 || index >= array.Length) 
                throw new ArgumentOutOfRangeException("index", SecurityResources.GetResourceString("ArgumentOutOfRange_Index")); 
            if (index + this.Count > array.Length)
                throw new ArgumentException(SecurityResources.GetResourceString("Argument_InvalidOffLen")); 

            for (int i=0; i < this.Count; i++) {
                array.SetValue(this[i], index);
                index++; 
            }
        } 
 
        public void CopyTo(CryptographicAttributeObject[] array, int index) {
            ((ICollection)this).CopyTo(array, index); 
        }

        public bool IsSynchronized {
            get { 
                return false;
            } 
        } 

        public Object SyncRoot { 
            get {
                return this;
            }
        } 
    }
 
    [System.Security.Permissions.HostProtection(MayLeakOnAbort = true)] 
    public sealed class CryptographicAttributeObjectEnumerator : IEnumerator {
        private CryptographicAttributeObjectCollection m_attributes; 
        private int m_current;

        private CryptographicAttributeObjectEnumerator() {}
 
        internal CryptographicAttributeObjectEnumerator(CryptographicAttributeObjectCollection attributes) {
            m_attributes = attributes; 
            m_current = -1; 
        }
 
        public CryptographicAttributeObject Current {
            get {
                return m_attributes[m_current];
            } 
        }
 
        ///  
        Object IEnumerator.Current {
            get { 
                return (Object) m_attributes[m_current];
            }
        }
 
        public bool MoveNext() {
            if (m_current == ((int) m_attributes.Count - 1)) 
                return false; 
            m_current++;
            return true; 
        }

        public void Reset() {
            m_current = -1; 
        }
    } 
} 

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