1// Copyright 2011 The Go Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style 3// license that can be found in the LICENSE file. 4 5package bcrypt 6 7import "encoding/base64" 8 9const alphabet = "./ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" 10 11var bcEncoding = base64.NewEncoding(alphabet) 12 13func base64Encode(src []byte) []byte { 14 n := bcEncoding.EncodedLen(len(src)) 15 dst := make([]byte, n) 16 bcEncoding.Encode(dst, src) 17 for dst[n-1] == '=' { 18 n-- 19 } 20 return dst[:n] 21} 22 23func base64Decode(src []byte) ([]byte, error) { 24 numOfEquals := 4 - (len(src) % 4) 25 for i := 0; i < numOfEquals; i++ { 26 src = append(src, '=') 27 } 28 29 dst := make([]byte, bcEncoding.DecodedLen(len(src))) 30 n, err := bcEncoding.Decode(dst, src) 31 if err != nil { 32 return nil, err 33 } 34 return dst[:n], nil 35} 36