bcryptHash

private fn

ubyte[bcryptPbkdfBlock] bcryptHash(const(ubyte)[]  sha2pass,
       const(ubyte)[]  sha2salt)

@safe nothrow

One bcrypt hash evaluation: 32 output bytes from 64-byte SHA-512 compressed password and salt images.

`sha2pass`	SHA-512 of the passphrase (64 bytes).
`sha2salt`	SHA-512 of the salt (64 bytes).

The 32-byte bcrypt hash output.