PKCS7 Encrypt MIME

Encrypt MIME using a digital certificate to create PKCS7 encrypted S/MIME.

Download Chilkat MIME ActiveX

CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @sTmp0 nvarchar(4000)

    DECLARE @mime int
    EXEC @hr = sp_OACreate 'Chilkat.Mime', @mime OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @success int

    EXEC sp_OAMethod @mime, 'UnlockComponent', @success OUT, 'Anything for 30-day trial.'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @mime, 'LastErrorText', @sTmp0 OUT

        PRINT @sTmp0
        RETURN
      END

    --  Build a simple MIME message to be encrypted:
    EXEC sp_OAMethod @mime, 'AddHeaderField', NULL, 'Content-Type', 'text/plain'
    EXEC sp_OAMethod @mime, 'AddHeaderField', NULL, 'abc', '123'
    EXEC sp_OAMethod @mime, 'SetBody', NULL, 'This is a test'

    --  A digital certificate is required to create PKCS7 encrypted MIME.
    --  It can come from a variety of sources: .cer file, .pfx file, PEM files,
    --  an in-memory representation, or directly from a Windows
    --  registry-based certificate store.

    --  This example will load a certificate object from a .cer file.
    --  Note: Only the public-key is required to encrypt.  (Decryption
    --  requires a private key.)

    DECLARE @cert int
    EXEC @hr = sp_OACreate 'Chilkat.Cert', @cert OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    EXEC sp_OAMethod @cert, 'LoadFromFile', @success OUT, 'myCert.cer'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @cert, 'LastErrorText', @sTmp0 OUT

        PRINT @sTmp0
        RETURN
      END

    --  Encrypt the MIME:
    EXEC sp_OAMethod @mime, 'Encrypt', @success OUT, @cert
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @mime, 'LastErrorText', @sTmp0 OUT

        PRINT @sTmp0
        RETURN
      END

    --  Display the MIME:
    EXEC sp_OAMethod @mime, 'GetMime', @sTmp0 OUT
    PRINT @sTmp0

    --  The resulting S/MIME looks something like this:
    --  
abc: 123
Content-Disposition: attachment; filename="smime.p7m"
Content-Transfer-Encoding: base64
Content-Type: application/x-pkcs7-mime;
 name="smime.p7m"

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fi23+g==

END
GO