The crypto code is all very internal to the kernel, so of course it will be GPL. Besides, I personally think that all kernel drivers should be GPL because they are essentially all derivative works of the kernel. The ability of module loading to get around the GPL is one of the more worrying decisions made by Torvalds.
Why is this a strange choice? Isn't most of the kernel GPL? (and thus, a non-GPL component can't link to the GPL part, as that would be a violation of the GPL, would it not?)