Iggy Azalea's Former BF She Gave Me Permission To Sell Sex Tape!

EXCLUSIVE
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Iggy Azalea
's former boyfriend/manager now claims Iggy signed her rights away to him, giving him legal authority to market their sex tape ... TMZ has learned.

Hefe Wine says Iggy signed a lengthy agreement with him in 2009 -- obtained by TMZ -- which gives him exclusive rights to "manufacture, sell, distribute and advertise 'any' recording embodying visual images."

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Iggy signed the contract to cut records and music videos, but Wine believes all he has to do is put a music bed under the sex tape which he claims would then give him exclusive rights to sell it. 

In other words, he believes Iggy has no legal ability to block a sex tape if he wants to sell it ... with Vivid Entertainment boss Steven Hirsch waiting in the wings with a seven-figure offer.

What's more ... the contract provides that Wine has the legal right to create, host and maintain a website to market Iggy's works, so he believes he could create a website which would host the video.