How to convert a base64 encoded string to binary?

Hi, gurus,
I want to convert a base64 encoded string (a image which is read from a xml file)
into a normal binary string and then upload to archive link.
could you pls give me some hints on that?
br.
jun

thank you for your quick reply!
my real requirement is to extract an image(it 's said it's encoded using base64?) from a xml file and upload it sap archive linke,
following is the xml content, does that mean i need to convert all the chars in the
<mime_content> pair to your fm, that will be convert to binary string?
<MIME_CONTENT xmlns:xfa="http://www.xfa.org/schema/xfa-data/1.0/" href="" xfa:contentType="image/jpg"
>/9j/4AAQSkZJRgABAAEAYABgAAD//gAfTEVBRCBUZWNobm9sb2dpZXMgSW5jLiBWMS4wMQD/2wCE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</MIME_CONTENT
>

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