真的不需要为bcrypt生成盐吗？

Question

I'm using the golang.org/x/crypto/bcrypt package for storing passwords. Looking at documentation and other SO questions, it seems like I'm not supposed to (or at least don't have to) generate a salt for the password before I generate the hash. This seems counter to everything that I've read about cryptography and modern password storing, and makes me a bit nervous. Is it really secure enough to just pass the user's normal password into bcrypt.GenerateFromPassword, or am I reading things wrong?

Answer 1

The bcrypt package generates the salt for the application. The return value from GenerateFromPassword encodes the cost, salt and hash of the password.