(SQL Server) Find Certificate for Email Address in Current-User Certificate Store (Windows-Only)

This is a Windows-only example to find a certificate for a given email address in the current-user certificate store (located in the Windows Registry).

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    -- This is a Windows-only example because it lists the certificates
    -- stored in the Windows Current User Certificate Store located in the
    -- Windows Registry.

    DECLARE @certStore int
    -- Use "Chilkat_9_5_0.CertStore" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.CertStore', @certStore OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @readOnly int
    SELECT @readOnly = 1
    DECLARE @success int
    EXEC sp_OAMethod @certStore, 'OpenCurrentUserStore', @success OUT, @readOnly
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @certStore, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @certStore
        RETURN
      END

    DECLARE @emailAddr nvarchar(4000)
    SELECT @emailAddr = 'support@chilkatsoft.com'
    DECLARE @cert int
    EXEC sp_OAMethod @certStore, 'FindCertBySubjectE', @cert OUT, @emailAddr
    EXEC sp_OAGetProperty @certStore, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN

        PRINT 'No certificate found for ' + @emailAddr
        EXEC @hr = sp_OADestroy @certStore
        RETURN
      END


    EXEC sp_OAGetProperty @cert, 'SubjectDN', @sTmp0 OUT
    PRINT 'Found: ' + @sTmp0
    EXEC @hr = sp_OADestroy @cert

    -- It should be case-insensitive, however it was found not to be.
    -- The case-insensitive search is fixed starting in Chilkat v9.5.0.65.
    SELECT @emailAddr = 'SUPPORT@chilkatsoft.com'
    EXEC sp_OAMethod @certStore, 'FindCertBySubjectE', @cert OUT, @emailAddr
    EXEC sp_OAGetProperty @certStore, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN

        PRINT 'No certificate found for ' + @emailAddr
        EXEC @hr = sp_OADestroy @certStore
        RETURN
      END


    EXEC sp_OAGetProperty @cert, 'SubjectDN', @sTmp0 OUT
    PRINT 'Found: ' + @sTmp0
    EXEC @hr = sp_OADestroy @cert


    EXEC @hr = sp_OADestroy @certStore


END
GO