mirror of https://github.com/ethereum/go-ethereum
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
25 lines
430 B
25 lines
430 B
11 years ago
|
package ethutil
|
||
|
|
|
||
|
|
import (
|
||
|
|
"crypto/rand"
|
||
|
|
"encoding/binary"
|
||
|
|
"io"
|
||
|
|
)
|
||
|
|
|
||
|
|
func randomUint64(r io.Reader) (uint64, error) {
|
||
|
|
b := make([]byte, 8)
|
||
|
|
n, err := r.Read(b)
|
||
|
|
if n != len(b) {
|
||
|
|
return 0, io.ErrShortBuffer
|
||
|
|
}
|
||
|
|
if err != nil {
|
||
|
|
return 0, err
|
||
|
|
}
|
||
|
|
return binary.BigEndian.Uint64(b), nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// RandomUint64 returns a cryptographically random uint64 value.
|
||
|
|
func RandomUint64() (uint64, error) {
|
||
|
|
return randomUint64(rand.Reader)
|
||
|
|
}
|