Also prehashing opens you up to an other bcrypt flaw you need to be aware of: it stops at the first NUL byte, so you need to use some sort of binary-to-text enc

Also prehashing opens you up to an other bcrypt flaw you need to be aware of: it stops at the first NUL byte, so you need to use some sort of binary-to-text encoding on top of the hash to ensure you don't have any of those in the data you ultimately hand off to bcrypt.