route/internal/routecrypto/secretbox.go

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2017-01-26 04:22:27 +00:00
package routecrypto
import (
"crypto/rand"
"encoding/base64"
"errors"
)
// GenerateKey creates a new key full of random data.
func GenerateKey() (*[32]byte, error) {
var k [32]byte
_, err := rand.Read(k[:])
if err != nil {
return nil, err
}
return &k, nil
}
// ShowKey makes a string out of an encryption key.
func ShowKey(key *[32]byte) string {
return base64.URLEncoding.EncodeToString(key[:])
}
// ParseKey decodes a key from a string.
func ParseKey(s string) (*[32]byte, error) {
k := &[32]byte{}
raw, err := base64.URLEncoding.DecodeString(s)
if err != nil {
return nil, err
}
if n := copy(k[:], raw); n < len(k) {
return nil, errors.New("not valid")
}
return k, nil
}