Mirrors/coredns
1
0
Fork 0
mirror of https://github.com/coredns/coredns.git synced 2026-03-03 03:13:10 -05:00
Code Issues Packages Projects Releases Wiki Activity

plugin/loop: use crypto/rand for query name generation (#7881)

Browse Source
This commit is contained in:
YOUNEVSKY
2026-02-25 10:21:04 +00:00
committed by GitHub
parent 4411cff759
commit 7ae1c40db2
1 changed files with 14 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
plugin/loop/setup.go
View File

@@ -1,6 +1,8 @@
package loop package loop
import ( import (
"crypto/rand"
"math/big"
"net" "net"
"strconv" "strconv"
"time" "time"
@@ -9,7 +11,6 @@ import (
"github.com/coredns/coredns/core/dnsserver" "github.com/coredns/coredns/core/dnsserver"
"github.com/coredns/coredns/plugin" "github.com/coredns/coredns/plugin"
"github.com/coredns/coredns/plugin/pkg/dnsutil" "github.com/coredns/coredns/plugin/pkg/dnsutil"
"github.com/coredns/coredns/plugin/pkg/rand"
) )
func init() { plugin.Register("loop", setup) } func init() { plugin.Register("loop", setup) }
@@ -82,12 +83,20 @@ func parse(c *caddy.Controller) (*Loop, error) {
return New(zones[0]), nil return New(zones[0]), nil
} }
// qname returns a random name. <rand.Int()>.<rand.Int().<zone>. // qname returns a secure random name: <random-int>.<random-int>.<zone>.
func qname(zone string) string { func qname(zone string) string {
l1 := strconv.Itoa(r.Int()) l1 := secureRandIntString()
l2 := strconv.Itoa(r.Int()) l2 := secureRandIntString()
return dnsutil.Join(l1, l2, zone) return dnsutil.Join(l1, l2, zone)
} }
var r = rand.New(time.Now().UnixNano()) func secureRandIntString() string {
// Generate a random 62-bit integer
n, err := rand.Int(rand.Reader, big.NewInt(1<<62))
if err != nil {
// Fallback to startup time in case rand.Reader is unavailable
return strconv.FormatInt(time.Now().UnixNano(), 10)
}
return n.String()
}