SQL Server

PKCS7 Encrypt MIME

See more MIME Examples

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

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

    -- This example requires the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

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

    -- Build a simple MIME message to be encrypted:
    EXEC sp_OAMethod @mime, 'AddHeaderField', @success OUT, 'Content-Type', 'text/plain'
    EXEC sp_OAMethod @mime, 'AddHeaderField', @success OUT, '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

    EXEC sp_OAMethod @cert, 'LoadFromFile', @success OUT, 'myCert.cer'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @cert, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @mime
        EXEC @hr = sp_OADestroy @cert
        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
        EXEC @hr = sp_OADestroy @mime
        EXEC @hr = sp_OADestroy @cert
        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"
    -- 
    -- MIICAQYJKoZIhvcNAQcDoIIB8jCCAe4CAQAxggGFMIIBgQIBADBpMFUxCzAJBgNVBAYTAlpBMSUw
    -- IwYDVQQKExxUaGF3dGUgQ29uc3VsdGluZyAoUHR5KSBMdGQuMR8wHQYDVQQDExZUaGF3dGUgQ29k
    -- ZSBTaWduaW5nIENBAhB4ouTcAmLszrGi170k1deSMA0GCSqGSIb3DQEBAQUABIIBABz59iwVufLZ
    -- QIPs0whUYMtBjIQxg5IOCxpoKJeJmLVzu9Q5Q1poxG9uYOveybS9c4wbl5A0DFfKTW5O4HhHcOHW
    -- TgcH4iqdwhiFWm/q9d5rjceJWBFQsGOcgoXSU/U2Xp+N47/+Pqyc5XJbxKnOc4YhPzO320JZsNB6
    -- p1NGk5SNnWqgbUDmEnfH8ZPHSV7dNi2aiFALYTyLjyp0lqJCsdZ524OPTZFfusrl/9ibPAW7jKuI
    -- FgDCcBtRJvolVF8iIHxaTw4rhk0qb1KWzxvB5j9HSLdyIKIPhZbxeS10bx18YkSsBlKfdKRalQag
    -- 3oWSRdsK9/N75YHG8Pm+x9BOHUAwYAYJKoZIhvcNAQcBMBkGCCqGSIb3DQMCMA0CAToECAb+toBW
    -- txZigDhGZKSpUpuTiWvvSMemX/c79sSnMpuefVwGKFTDgXVLE2SoD5a9Yh5vcG7Mhl2IkilVwOMc
    -- fi23+g==

    EXEC @hr = sp_OADestroy @mime
    EXEC @hr = sp_OADestroy @cert


END
GO