Use an hex prefix consistenly, either 0x xor h, but not both.
From draft v09
key_dst = h'4242535f424c53313233383147315f584f463a5348414b452d3235365f53
5357555f524f5f4832475f484d32535f4b455947454e5f4453545f'
SK = 0x'2eee0f60a8a3a8bec0ee942bfd46cbdae9a0738ee68f5a64e7238311cf09
a079'
