33 lines
613 B
Go
33 lines
613 B
Go
package rnd
|
|
|
|
import (
|
|
"crypto/rand"
|
|
"encoding/binary"
|
|
"fmt"
|
|
"strconv"
|
|
)
|
|
|
|
// Token returns a random token with length of up to 10 characters.
|
|
func Token(size uint) string {
|
|
if size > 10 || size < 1 {
|
|
panic(fmt.Sprintf("size out of range: %d", size))
|
|
}
|
|
|
|
result := make([]byte, 0, 14)
|
|
b := make([]byte, 8)
|
|
|
|
if _, err := rand.Read(b); err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
randomInt := binary.BigEndian.Uint64(b)
|
|
|
|
result = append(result, strconv.FormatUint(randomInt, 36)...)
|
|
|
|
for i := len(result); i < cap(result); i++ {
|
|
result = append(result, byte(123-(cap(result)-i)))
|
|
}
|
|
|
|
return string(result[:size])
|
|
}
|