http://bugs.winehq.org/show_bug.cgi?id=8298
--- Comment #16 from Juan Lang juan_lang@yahoo.com 2007-09-19 10:02:44 --- Does this still require a native crypt32? The digital signature stuff should be working as of wine 0.9.45, as that's what iTunes depended on.
Please retry without native crypt32. If it still fails, please post a +crypt log and I'll have a look.