(SQL Server) Load PKCS12 / PFX and Access Contents

Loads a PKCS12 / PFX file and iterates over the contents which include private keys and certificates.

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

    -- Load the PKCS12 from a file
    DECLARE @success int
    EXEC sp_OAMethod @pfx, 'LoadPfxFile', @success OUT, '/someDir/my.p12', 'pfxFilePassword'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @pfx, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pfx
        RETURN
      END

    DECLARE @numPrivateKeys int
    EXEC sp_OAGetProperty @pfx, 'NumPrivateKeys', @numPrivateKeys OUT

    DECLARE @privKey int


    PRINT 'Private Keys:'

    DECLARE @i int
    SELECT @i = 0
    WHILE @i < @numPrivateKeys
      BEGIN
        EXEC sp_OAMethod @pfx, 'GetPrivateKey', @privKey OUT, @i

        -- Do something with the private key ...

        EXEC @hr = sp_OADestroy @privKey

        SELECT @i = @i + 1
      END

    DECLARE @cert int

    DECLARE @numCerts int
    EXEC sp_OAGetProperty @pfx, 'NumCerts', @numCerts OUT


    PRINT 'Certs:'
    SELECT @i = 0
    WHILE @i < @numCerts
      BEGIN
        EXEC sp_OAMethod @pfx, 'GetCert', @cert OUT, @i
        EXEC sp_OAGetProperty @cert, 'SubjectDN', @sTmp0 OUT
        PRINT @sTmp0

        -- If the certificate has a private key (one of the private keys within the PFX)
        -- then it can also be obtained via the certificate object:
        EXEC sp_OAMethod @cert, 'HasPrivateKey', @iTmp0 OUT
        IF @iTmp0 = 1
          BEGIN


            PRINT 'Has private key!'

            EXEC sp_OAMethod @cert, 'ExportPrivateKey', @privKey OUT
            -- ...
            EXEC @hr = sp_OADestroy @privKey

          END

        EXEC @hr = sp_OADestroy @cert

        SELECT @i = @i + 1
      END

    EXEC @hr = sp_OADestroy @pfx


END
GO