X509Certificate2Collection.Find Method
Assembly: System (in system.dll)
'Declaration Public Function Find ( _ findType As X509FindType, _ findValue As Object, _ validOnly As Boolean _ ) As X509Certificate2Collection 'Usage Dim instance As X509Certificate2Collection Dim findType As X509FindType Dim findValue As Object Dim validOnly As Boolean Dim returnValue As X509Certificate2Collection returnValue = instance.Find(findType, findValue, validOnly)
public X509Certificate2Collection Find ( X509FindType findType, Object findValue, boolean validOnly )
public function Find ( findType : X509FindType, findValue : Object, validOnly : boolean ) : X509Certificate2Collection
Not applicable.
Parameters
- findType
One of the X509FindType values.
- findValue
The search criteria as an object.
- validOnly
true to allow only valid certificates to be returned from the search; otherwise, false.
Return Value
An X509Certificate2Collection object.Use this method to find X509Certificate2 objects if no user interaction is needed. Use the Find method to allow the user to select X509Certificate2 objects.
Note that this method can be used in a cascading or nested style, narrowing the search criteria with each call to the method.
The following code example opens the current user's personal certificate store, finds only valid certificates, allows the user to select a certificate, and then writes certificate and certificate chain information to the console. The output depends on the certificate the user selects.
Imports System Imports System.Security.Cryptography Imports System.Security.Permissions Imports System.IO Imports System.Security.Cryptography.X509Certificates Class CertSelect Shared Sub Main() Try Dim store As New X509Store("MY", StoreLocation.CurrentUser) store.Open(OpenFlags.ReadOnly Or OpenFlags.OpenExistingOnly) Dim collection As X509Certificate2Collection = CType(store.Certificates, X509Certificate2Collection) Dim fcollection As X509Certificate2Collection = CType(collection.Find(X509FindType.FindByTimeValid, DateTime.Now, False), X509Certificate2Collection) Dim scollection As X509Certificate2Collection = X509Certificate2UI.SelectFromCollection(fcollection, "Test Certificate Select", "Select a certificate from the following list to get information on that certificate", X509SelectionFlag.MultiSelection) Console.WriteLine("Number of certificates: {0}{1}", scollection.Count, Environment.NewLine) Dim x509 As X509Certificate2 For Each x509 In scollection Dim rawdata As Byte() = x509.RawData Console.WriteLine("Content Type: {0}{1}", X509Certificate2.GetCertContentType(rawdata), Environment.NewLine) Console.WriteLine("Friendly Name: {0}{1}", x509.FriendlyName, Environment.NewLine) Console.WriteLine("Certificate Verified?: {0}{1}", x509.Verify(), Environment.NewLine) Console.WriteLine("Simple Name: {0}{1}", x509.GetNameInfo(X509NameType.SimpleName, True), Environment.NewLine) Console.WriteLine("Signature Algorithm: {0}{1}", x509.SignatureAlgorithm.FriendlyName, Environment.NewLine) Console.WriteLine("Private Key: {0}{1}", x509.PrivateKey.ToXmlString(False), Environment.NewLine) Console.WriteLine("Public Key: {0}{1}", x509.PublicKey.Key.ToXmlString(False), Environment.NewLine) Console.WriteLine("Certificate Archived?: {0}{1}", x509.Archived, Environment.NewLine) Console.WriteLine("Length of Raw Data: {0}{1}", x509.RawData.Length, Environment.NewLine) X509Certificate2UI.DisplayCertificate(x509) x509.Reset() Next x509 store.Close() Catch cExcept As CryptographicException Console.WriteLine("Information could not be written out for this certificate.") End Try End Sub End Class
import System.*;
import System.Security.Cryptography.*;
import System.Security.Permissions.*;
import System.IO.*;
import System.Security.Cryptography.X509Certificates.*;
public class CertSelect
{
/** @attribute SecurityPermission(SecurityAction.LinkDemand,
Unrestricted = true) */
public static void main(String[] args)
{
try {
X509Store store = new X509Store("MY", StoreLocation.CurrentUser);
store.Open(OpenFlags.ReadOnly | OpenFlags.OpenExistingOnly);
X509Certificate2Collection collection =
(X509Certificate2Collection)store.get_Certificates();
X509Certificate2Collection fCollection =
(X509Certificate2Collection)collection.Find(
X509FindType.FindByTimeValid, DateTime.get_Now(), false);
X509Certificate2Collection sCollection = X509Certificate2UI.SelectFromCollection(fCollection, "Test Certificate Select","Select a certificate from the following list to get information on that certificate",X509SelectionFlag.MultiSelection);
Console.WriteLine("Number of certificates: {0}{1}",
(Int32)sCollection.get_Count(), Environment.get_NewLine());
for (int iCtr = 0; iCtr < sCollection.get_Count(); iCtr++) {
X509Certificate2 x509 =
(X509Certificate2)(sCollection.get_Item(iCtr));
ubyte rawData[] = x509.get_RawData();
Console.WriteLine("Content Type: {0}{1}",
X509Certificate2.GetCertContentType(rawData),
Environment.get_NewLine());
Console.WriteLine("Friendly Name: {0}{1}",
x509.get_FriendlyName(), Environment.get_NewLine());
Console.WriteLine("Certificate Verified?: {0}{1}",
(System.Boolean)x509.Verify(), Environment.get_NewLine());
Console.WriteLine("Simple Name: {0}{1}",
x509.GetNameInfo(X509NameType.SimpleName, true),
Environment.get_NewLine());
Console.WriteLine("Signature Algorithm: {0}{1}",
x509.get_SignatureAlgorithm().get_FriendlyName(),
Environment.get_NewLine());
Console.WriteLine("Private Key: {0}{1}",
x509.get_PrivateKey().ToXmlString(false),
Environment.get_NewLine());
Console.WriteLine("Public Key: {0}{1}",
x509.get_PublicKey().get_Key().ToXmlString(false),
Environment.get_NewLine());
Console.WriteLine("Certificate Archived?: {0}{1}",
(System.Boolean)x509.get_Archived(),
Environment.get_NewLine());
Console.WriteLine("Length of Raw Data: {0}{1}",
(Int32)x509.get_RawData().length,
Environment.get_NewLine());
X509Certificate2UI.DisplayCertificate(x509);
x509.Reset();
}
store.Close();
}
catch (CryptographicException exp) {
Console.WriteLine("Information could not be written out for this "
+ "certificate.");
}
} //main
} //CertSelect
Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.