bcrypt.DefaultCost
const DefaultCost = 10
bcrypt.MaxCost
const MaxCost = 31
bcrypt.MinCost
const MinCost = 4
bcrypt.ErrHashTooShort
// The error returned from CompareHashAndPassword when a hash is too short to
// be a bcrypt hash.
var ErrHashTooShort = errors.New("crypto/bcrypt: hashedSecret too short to be a bcrypted password")
bcrypt.ErrMismatchedHashAndPassword
// The error returned from CompareHashAndPassword when a password and hash do
// not match.
var ErrMismatchedHashAndPassword = errors.New("crypto/bcrypt: hashedPassword is not the hash of the given password")
bcrypt.ErrPasswordTooLong
// ErrPasswordTooLong is returned when the password passed to
// GenerateFromPassword is too long (i.e. > 72 bytes).
var ErrPasswordTooLong = errors.New("bcrypt: password length exceeds 72 bytes")
bcrypt.CompareHashAndPassword
// CompareHashAndPassword compares a bcrypt hashed password with its possible
// plaintext equivalent. Returns nil on success, or an error on failure.
func CompareHashAndPassword(hashedPassword []byte, password []byte) error
bcrypt.Cost
// Cost returns the hashing cost used to create the given hashed
// password. When, in the future, the hashing cost of a password system needs
// to be increased in order to adjust for greater computational power, this
// function allows one to establish which passwords need to be updated.
func Cost(hashedPassword []byte) (int, error)
bcrypt.GenerateFromPassword
// GenerateFromPassword returns the bcrypt hash of the password at the given
// cost. If the cost given is less than MinCost, the cost will be set to
// DefaultCost, instead. Use CompareHashAndPassword, as defined in this package,
// to compare the returned hashed password with its cleartext version.
// GenerateFromPassword does not accept passwords longer than 72 bytes, which
// is the longest password bcrypt will operate on.
func GenerateFromPassword(password []byte, cost int) ([]byte, error)