package encoding/base64
EncodedLen returns the length in bytes of the base64 encoding of an input buffer of length n.
Golang encoding/base64.Encoding.EncodedLen function usage examples
Example 1 :
digest := hash.Sum(nil)
mac := make([]byte, base64.URLEncoding.EncodedLen(len(digest)))
base64.URLEncoding.Encode(mac, digest)
Example 2 :
msg := []byte("abcd")
encoded := make([]byte, base64.StdEncoding.EncodedLen(len(msg)))
base64.StdEncoding.Encode(encoded, msg)
Reference :
http://golang.org/pkg/encoding/base64/#Encoding.EncodedLen
