FreeBSD 12 support (NOTE: xc not yet functional)

Signed-off-by: Russ Magee <rmagee@gmail.com>

vendor/gopkg.in/hlandau/passlib.v1/hash/bcrypt/bcrypt.go

@@ -1,72 +0,0 @@
-// Package bcrypt implements the bcrypt password hashing mechanism.
-//
-// Please note that bcrypt truncates passwords to 72 characters in length. Consider using
-// a more modern hashing scheme such as scrypt or sha-crypt. If you must use bcrypt,
-// consider using bcrypt-sha256 instead.
-package bcrypt
-
-import "golang.org/x/crypto/bcrypt"
-import "gopkg.in/hlandau/passlib.v1/abstract"
-import "fmt"
-
-// An implementation of Scheme implementing bcrypt.
-//
-// Uses RecommendedCost.
-var Crypter abstract.Scheme
-
-// The recommended cost for bcrypt. This may change with subsequent releases.
-const RecommendedCost = 12
-
-// bcrypt.DefaultCost is a bit low (10), so use 12 instead.
-
-func init() {
-	Crypter = New(RecommendedCost)
-}
-
-// Create a new scheme implementing bcrypt. The recommended cost is RecommendedCost.
-func New(cost int) abstract.Scheme {
-	return &scheme{
-		Cost: cost,
-	}
-}
-
-type scheme struct {
-	Cost int
-}
-
-func (s *scheme) SupportsStub(stub string) bool {
-	return len(stub) >= 3 && stub[0] == '$' && stub[1] == '2' &&
-		(stub[2] == '$' || (len(stub) >= 4 && stub[3] == '$' &&
-			(stub[2] == 'a' || stub[2] == 'b' || stub[2] == 'y')))
-}
-
-func (s *scheme) Hash(password string) (string, error) {
-	h, err := bcrypt.GenerateFromPassword([]byte(password), s.Cost)
-	if err != nil {
-		return "", err
-	}
-
-	return string(h), nil
-}
-
-func (s *scheme) Verify(password, hash string) error {
-	err := bcrypt.CompareHashAndPassword([]byte(hash), []byte(password))
-	if err == bcrypt.ErrMismatchedHashAndPassword {
-		err = abstract.ErrInvalidPassword
-	}
-
-	return err
-}
-
-func (s *scheme) NeedsUpdate(stub string) bool {
-	cost, err := bcrypt.Cost([]byte(stub))
-	if err != nil {
-		return false
-	}
-
-	return cost < s.Cost
-}
-
-func (s *scheme) String() string {
-	return fmt.Sprintf("bcrypt(%d)", s.Cost)
-}