CompareHashAndPassword compares the hash and password, returns nil if equal otherwise an error.

GenerateFromPassword generates a password hash from a password, using PasswordHashCost.

GenerateOtp generates a random n digit otp.

See: https://github.com/firebase/scrypt for implementation.

SecureToken creates a new random token.

DefaultHashCost represents the default hashing cost for any hashing algorithm.

Firebase uses AES-256 which requires 32 byte keys: https://pkg.go.dev/golang.org/x/crypto/scrypt#Key.

QuickHashCosts represents the quickest hashing cost for any hashing algorithm, useful for tests only.

PasswordHashCost is the current pasword hashing cost for all new hashes generated with GenerateHashFromPassword.