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// package base64url provides base64url encoding/decoding support
package base64url
import (
"strings"
"encoding/base64"
)
// Decode decodes base64url string to byte array
func Decode(data string) ([]byte,error) {
data = strings.Replace(data, "-", "+", -1) // 62nd char of encoding
data = strings.Replace(data, "_", "/", -1) // 63rd char of encoding
switch(len(data) % 4) { // Pad with trailing '='s
case 0: // no padding
case 2: data+="==" // 2 pad chars
case 3: data+="=" // 1 pad char
}
return base64.StdEncoding.DecodeString(data)
}
// Encode encodes given byte array to base64url string
func Encode(data []byte) string {
result := base64.StdEncoding.EncodeToString(data)
result = strings.Replace(result, "+", "-", -1) // 62nd char of encoding
result = strings.Replace(result, "/", "_", -1) // 63rd char of encoding
result = strings.Replace(result, "=", "", -1) // Remove any trailing '='s
return result
}
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