gtsocial-umbx

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base64.go (817B)

      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 
      5 package bcrypt
      6 
      7 import "encoding/base64"
      8 
      9 const alphabet = "./ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
     10 
     11 var bcEncoding = base64.NewEncoding(alphabet)
     12 
     13 func 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 
     23 func 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 }