X509UI.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / ManagedLibraries / Security / System / Security / Cryptography / X509 / X509UI.cs / 1305376 / X509UI.cs
                        
                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
// [....]
// 
 
//
// X509UI.cs 
//

namespace System.Security.Cryptography.X509Certificates {
    using System; 
    using System.Globalization;
    using System.Runtime.InteropServices; 
    using System.Security.Cryptography; 
    using System.Security.Permissions;
 
    public enum X509SelectionFlag {
        SingleSelection = 0x00,
        MultiSelection  = 0x01
    } 

    [System.Security.Permissions.HostProtection(MayLeakOnAbort = true)] 
    public static class X509Certificate2UI { 
        [SecuritySafeCritical]
        public static void DisplayCertificate (X509Certificate2 certificate) { 
            if (certificate == null)
                throw new ArgumentNullException("certificate");
            DisplayX509Certificate(X509Utils.GetCertContext(certificate), IntPtr.Zero);
        } 

        [SecurityCritical] 
        public static void DisplayCertificate (X509Certificate2 certificate, IntPtr hwndParent) { 
            if (certificate == null)
                throw new ArgumentNullException("certificate"); 
            DisplayX509Certificate(X509Utils.GetCertContext(certificate), hwndParent);
        }

        public static X509Certificate2Collection SelectFromCollection (X509Certificate2Collection certificates, string title, string message, X509SelectionFlag selectionFlag) { 
            return SelectFromCollectionHelper(certificates, title, message, selectionFlag, IntPtr.Zero);
        } 
 
        [SecurityCritical]
        public static X509Certificate2Collection SelectFromCollection (X509Certificate2Collection certificates, string title, string message, X509SelectionFlag selectionFlag, IntPtr hwndParent) { 
            return SelectFromCollectionHelper(certificates, title, message, selectionFlag, hwndParent);
        }

        [SecurityCritical] 
        private static void DisplayX509Certificate (SafeCertContextHandle safeCertContext, IntPtr hwndParent) {
            if (safeCertContext.IsInvalid) 
                throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_InvalidHandle"), "safeCertContext"); 

            int dwErrorCode = CAPI.ERROR_SUCCESS; 

            // Initialize view structure.
            CAPI.CRYPTUI_VIEWCERTIFICATE_STRUCTW ViewInfo = new CAPI.CRYPTUI_VIEWCERTIFICATE_STRUCTW();
            ViewInfo.dwSize = (uint) Marshal.SizeOf(ViewInfo); 
            ViewInfo.hwndParent = hwndParent;
            ViewInfo.dwFlags = 0; 
            ViewInfo.szTitle = null; 
            ViewInfo.pCertContext = safeCertContext.DangerousGetHandle();
            ViewInfo.rgszPurposes = IntPtr.Zero; 
            ViewInfo.cPurposes = 0;
            ViewInfo.pCryptProviderData = IntPtr.Zero;
            ViewInfo.fpCryptProviderDataTrustedUsage = false;
            ViewInfo.idxSigner = 0; 
            ViewInfo.idxCert = 0;
            ViewInfo.fCounterSigner = false; 
            ViewInfo.idxCounterSigner = 0; 
            ViewInfo.cStores = 0;
            ViewInfo.rghStores = IntPtr.Zero; 
            ViewInfo.cPropSheetPages = 0;
            ViewInfo.rgPropSheetPages = IntPtr.Zero;
            ViewInfo.nStartPage = 0;
 
            // View the certificate
            if (!CAPI.CryptUIDlgViewCertificateW(ViewInfo, IntPtr.Zero)) 
                dwErrorCode = Marshal.GetLastWin32Error(); 

            // CryptUIDlgViewCertificateW returns ERROR_CANCELLED if the user closes 
            // the window through the x button or by pressing CANCEL, so ignore this error code
            if (dwErrorCode != CAPI.ERROR_SUCCESS && dwErrorCode != CAPI.ERROR_CANCELLED)
                throw new CryptographicException(Marshal.GetLastWin32Error());
        } 

        [SecuritySafeCritical] 
        private static X509Certificate2Collection SelectFromCollectionHelper (X509Certificate2Collection certificates, string title, string message, X509SelectionFlag selectionFlag, IntPtr hwndParent) { 
            if (certificates == null)
                throw new ArgumentNullException("certificates"); 
            if (selectionFlag < X509SelectionFlag.SingleSelection || selectionFlag > X509SelectionFlag.MultiSelection)
                throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, SecurityResources.GetResourceString("Arg_EnumIllegalVal"), "selectionFlag"));

            // 
            // We need to Assert all StorePermission flags since this is a memory store and we want
            // semi-trusted code to be able to select certificates from a memory store. 
            // 

            StorePermission sp = new StorePermission(StorePermissionFlags.AllFlags); 
            sp.Assert();

            using (SafeCertStoreHandle safeSourceStoreHandle = X509Utils.ExportToMemoryStore(certificates))
            using (SafeCertStoreHandle safeTargetStoreHandle = SelectFromStore(safeSourceStoreHandle, title, message, selectionFlag, hwndParent)) 
            {
                return X509Utils.GetCertificates(safeTargetStoreHandle); 
            } 
        }
 
        [SecurityCritical]
        private static unsafe SafeCertStoreHandle SelectFromStore (SafeCertStoreHandle safeSourceStoreHandle, string title, string message, X509SelectionFlag selectionFlags, IntPtr hwndParent) {
            int dwErrorCode = CAPI.ERROR_SUCCESS;
 
            // First, create a memory store
            SafeCertStoreHandle safeCertStoreHandle = CAPI.CertOpenStore((IntPtr) CAPI.CERT_STORE_PROV_MEMORY, 
                                                                         CAPI.X509_ASN_ENCODING | CAPI.PKCS_7_ASN_ENCODING, 
                                                                         IntPtr.Zero,
                                                                         0, 
                                                                         null);

            if (safeCertStoreHandle == null || safeCertStoreHandle.IsInvalid)
                throw new CryptographicException(Marshal.GetLastWin32Error()); 

            CAPI.CRYPTUI_SELECTCERTIFICATE_STRUCTW csc = new CAPI.CRYPTUI_SELECTCERTIFICATE_STRUCTW(); 
            // Older versions of CRYPTUI do not check the size correctly, 
            // so always force it to the oldest version of the structure.
            csc.dwSize = (uint) Marshal.OffsetOf(typeof(CAPI.CRYPTUI_SELECTCERTIFICATE_STRUCTW), "hSelectedCertStore"); 
            csc.hwndParent = hwndParent;
            csc.dwFlags = (uint) selectionFlags;
            csc.szTitle = title;
            csc.dwDontUseColumn = 0; 
            csc.szDisplayString = message;
            csc.pFilterCallback = IntPtr.Zero; 
            csc.pDisplayCallback = IntPtr.Zero; 
            csc.pvCallbackData = IntPtr.Zero;
            csc.cDisplayStores = 1; 
            IntPtr hSourceCertStore = safeSourceStoreHandle.DangerousGetHandle();
            csc.rghDisplayStores = new IntPtr(&hSourceCertStore);
            csc.cStores = 0;
            csc.rghStores = IntPtr.Zero; 
            csc.cPropSheetPages = 0;
            csc.rgPropSheetPages = IntPtr.Zero; 
            csc.hSelectedCertStore = safeCertStoreHandle.DangerousGetHandle(); 

            SafeCertContextHandle safeCertContextHandle = CAPI.CryptUIDlgSelectCertificateW(csc); 

            if (safeCertContextHandle != null && !safeCertContextHandle.IsInvalid) {
                // Single select, so add it to our hCertStore
                SafeCertContextHandle ppStoreContext = SafeCertContextHandle.InvalidHandle; 
                if (!CAPI.CertAddCertificateContextToStore(safeCertStoreHandle,
                                                           safeCertContextHandle, 
                                                           CAPI.CERT_STORE_ADD_NEWER_INHERIT_PROPERTIES, 
                                                           ppStoreContext))
                    dwErrorCode = Marshal.GetLastWin32Error(); 
            }

            if (dwErrorCode != CAPI.ERROR_SUCCESS)
                throw new CryptographicException(Marshal.GetLastWin32Error()); 

            return safeCertStoreHandle; 
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
// [....]
// 
 
//
// X509UI.cs 
//

namespace System.Security.Cryptography.X509Certificates {
    using System; 
    using System.Globalization;
    using System.Runtime.InteropServices; 
    using System.Security.Cryptography; 
    using System.Security.Permissions;
 
    public enum X509SelectionFlag {
        SingleSelection = 0x00,
        MultiSelection  = 0x01
    } 

    [System.Security.Permissions.HostProtection(MayLeakOnAbort = true)] 
    public static class X509Certificate2UI { 
        [SecuritySafeCritical]
        public static void DisplayCertificate (X509Certificate2 certificate) { 
            if (certificate == null)
                throw new ArgumentNullException("certificate");
            DisplayX509Certificate(X509Utils.GetCertContext(certificate), IntPtr.Zero);
        } 

        [SecurityCritical] 
        public static void DisplayCertificate (X509Certificate2 certificate, IntPtr hwndParent) { 
            if (certificate == null)
                throw new ArgumentNullException("certificate"); 
            DisplayX509Certificate(X509Utils.GetCertContext(certificate), hwndParent);
        }

        public static X509Certificate2Collection SelectFromCollection (X509Certificate2Collection certificates, string title, string message, X509SelectionFlag selectionFlag) { 
            return SelectFromCollectionHelper(certificates, title, message, selectionFlag, IntPtr.Zero);
        } 
 
        [SecurityCritical]
        public static X509Certificate2Collection SelectFromCollection (X509Certificate2Collection certificates, string title, string message, X509SelectionFlag selectionFlag, IntPtr hwndParent) { 
            return SelectFromCollectionHelper(certificates, title, message, selectionFlag, hwndParent);
        }

        [SecurityCritical] 
        private static void DisplayX509Certificate (SafeCertContextHandle safeCertContext, IntPtr hwndParent) {
            if (safeCertContext.IsInvalid) 
                throw new CryptographicException(SecurityResources.GetResourceString("Cryptography_InvalidHandle"), "safeCertContext"); 

            int dwErrorCode = CAPI.ERROR_SUCCESS; 

            // Initialize view structure.
            CAPI.CRYPTUI_VIEWCERTIFICATE_STRUCTW ViewInfo = new CAPI.CRYPTUI_VIEWCERTIFICATE_STRUCTW();
            ViewInfo.dwSize = (uint) Marshal.SizeOf(ViewInfo); 
            ViewInfo.hwndParent = hwndParent;
            ViewInfo.dwFlags = 0; 
            ViewInfo.szTitle = null; 
            ViewInfo.pCertContext = safeCertContext.DangerousGetHandle();
            ViewInfo.rgszPurposes = IntPtr.Zero; 
            ViewInfo.cPurposes = 0;
            ViewInfo.pCryptProviderData = IntPtr.Zero;
            ViewInfo.fpCryptProviderDataTrustedUsage = false;
            ViewInfo.idxSigner = 0; 
            ViewInfo.idxCert = 0;
            ViewInfo.fCounterSigner = false; 
            ViewInfo.idxCounterSigner = 0; 
            ViewInfo.cStores = 0;
            ViewInfo.rghStores = IntPtr.Zero; 
            ViewInfo.cPropSheetPages = 0;
            ViewInfo.rgPropSheetPages = IntPtr.Zero;
            ViewInfo.nStartPage = 0;
 
            // View the certificate
            if (!CAPI.CryptUIDlgViewCertificateW(ViewInfo, IntPtr.Zero)) 
                dwErrorCode = Marshal.GetLastWin32Error(); 

            // CryptUIDlgViewCertificateW returns ERROR_CANCELLED if the user closes 
            // the window through the x button or by pressing CANCEL, so ignore this error code
            if (dwErrorCode != CAPI.ERROR_SUCCESS && dwErrorCode != CAPI.ERROR_CANCELLED)
                throw new CryptographicException(Marshal.GetLastWin32Error());
        } 

        [SecuritySafeCritical] 
        private static X509Certificate2Collection SelectFromCollectionHelper (X509Certificate2Collection certificates, string title, string message, X509SelectionFlag selectionFlag, IntPtr hwndParent) { 
            if (certificates == null)
                throw new ArgumentNullException("certificates"); 
            if (selectionFlag < X509SelectionFlag.SingleSelection || selectionFlag > X509SelectionFlag.MultiSelection)
                throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, SecurityResources.GetResourceString("Arg_EnumIllegalVal"), "selectionFlag"));

            // 
            // We need to Assert all StorePermission flags since this is a memory store and we want
            // semi-trusted code to be able to select certificates from a memory store. 
            // 

            StorePermission sp = new StorePermission(StorePermissionFlags.AllFlags); 
            sp.Assert();

            using (SafeCertStoreHandle safeSourceStoreHandle = X509Utils.ExportToMemoryStore(certificates))
            using (SafeCertStoreHandle safeTargetStoreHandle = SelectFromStore(safeSourceStoreHandle, title, message, selectionFlag, hwndParent)) 
            {
                return X509Utils.GetCertificates(safeTargetStoreHandle); 
            } 
        }
 
        [SecurityCritical]
        private static unsafe SafeCertStoreHandle SelectFromStore (SafeCertStoreHandle safeSourceStoreHandle, string title, string message, X509SelectionFlag selectionFlags, IntPtr hwndParent) {
            int dwErrorCode = CAPI.ERROR_SUCCESS;
 
            // First, create a memory store
            SafeCertStoreHandle safeCertStoreHandle = CAPI.CertOpenStore((IntPtr) CAPI.CERT_STORE_PROV_MEMORY, 
                                                                         CAPI.X509_ASN_ENCODING | CAPI.PKCS_7_ASN_ENCODING, 
                                                                         IntPtr.Zero,
                                                                         0, 
                                                                         null);

            if (safeCertStoreHandle == null || safeCertStoreHandle.IsInvalid)
                throw new CryptographicException(Marshal.GetLastWin32Error()); 

            CAPI.CRYPTUI_SELECTCERTIFICATE_STRUCTW csc = new CAPI.CRYPTUI_SELECTCERTIFICATE_STRUCTW(); 
            // Older versions of CRYPTUI do not check the size correctly, 
            // so always force it to the oldest version of the structure.
            csc.dwSize = (uint) Marshal.OffsetOf(typeof(CAPI.CRYPTUI_SELECTCERTIFICATE_STRUCTW), "hSelectedCertStore"); 
            csc.hwndParent = hwndParent;
            csc.dwFlags = (uint) selectionFlags;
            csc.szTitle = title;
            csc.dwDontUseColumn = 0; 
            csc.szDisplayString = message;
            csc.pFilterCallback = IntPtr.Zero; 
            csc.pDisplayCallback = IntPtr.Zero; 
            csc.pvCallbackData = IntPtr.Zero;
            csc.cDisplayStores = 1; 
            IntPtr hSourceCertStore = safeSourceStoreHandle.DangerousGetHandle();
            csc.rghDisplayStores = new IntPtr(&hSourceCertStore);
            csc.cStores = 0;
            csc.rghStores = IntPtr.Zero; 
            csc.cPropSheetPages = 0;
            csc.rgPropSheetPages = IntPtr.Zero; 
            csc.hSelectedCertStore = safeCertStoreHandle.DangerousGetHandle(); 

            SafeCertContextHandle safeCertContextHandle = CAPI.CryptUIDlgSelectCertificateW(csc); 

            if (safeCertContextHandle != null && !safeCertContextHandle.IsInvalid) {
                // Single select, so add it to our hCertStore
                SafeCertContextHandle ppStoreContext = SafeCertContextHandle.InvalidHandle; 
                if (!CAPI.CertAddCertificateContextToStore(safeCertStoreHandle,
                                                           safeCertContextHandle, 
                                                           CAPI.CERT_STORE_ADD_NEWER_INHERIT_PROPERTIES, 
                                                           ppStoreContext))
                    dwErrorCode = Marshal.GetLastWin32Error(); 
            }

            if (dwErrorCode != CAPI.ERROR_SUCCESS)
                throw new CryptographicException(Marshal.GetLastWin32Error()); 

            return safeCertStoreHandle; 
        } 
    }
} 

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