-
Notifications
You must be signed in to change notification settings - Fork 43
/
randomStrings.go
40 lines (35 loc) · 1.24 KB
/
randomStrings.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
// thanks to @elithrar for the code to create the secret token!
// source: https://elithrar.github.io/article/generating-secure-random-numbers-crypto-rand/
package randomstrings
import (
"crypto/rand"
"encoding/base64"
)
// GenerateRandomBytes returns securely generated random bytes.
// It will return an error if the system's secure random
// number generator fails to function correctly, in which
// case the caller should not continue.
func GenerateRandomBytes(n int) ([]byte, error) {
b := make([]byte, n)
_, err := rand.Read(b)
// Note that err == nil only if we read len(b) bytes.
if err != nil {
return nil, err
}
return b, nil
}
// GenerateRandomString returns a URL-safe, base64 encoded
// securely generated random string.
// It will return an error if the system's secure random
// number generator fails to function correctly, in which
// case the caller should not continue.
func GenerateRandomString(s int) (string, error) {
b, err := GenerateRandomBytes(s)
return base64.URLEncoding.EncodeToString(b), err
}
// Example: this will give us a 44 byte, base64 encoded output
// token, err := GenerateRandomString(32)
// if err != nil {
// // Serve an appropriately vague error to the
// // user, but log the details internally.
// }