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Update sync.go

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sashaodessa 2025-10-16 18:16:57 +02:00 committed by GitHub
parent ff54ca02de
commit e408e6cd8f
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1 changed files with 8 additions and 2 deletions
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10
p2p/dnsdisc/sync.go
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@ -18,7 +18,8 @@ package dnsdisc
import ( import (
"context" "context"
"math/rand" crand "crypto/rand"
"math/big"
"time" "time"
"github.com/ethereum/go-ethereum/common/mclock" "github.com/ethereum/go-ethereum/common/mclock"
@ -131,7 +132,12 @@ func (ct *clientTree) syncNextLink(ctx context.Context) error {
} }
func (ct *clientTree) syncNextRandomENR(ctx context.Context) (*enode.Node, error) { func (ct *clientTree) syncNextRandomENR(ctx context.Context) (*enode.Node, error) {
index := rand.Intn(len(ct.enrs.missing)) // Use CSPRNG to avoid deterministic selection across processes.
n, err := crand.Int(crand.Reader, big.NewInt(int64(len(ct.enrs.missing))))
if err != nil {
return nil, err
}
index := int(n.Int64())
hash := ct.enrs.missing[index] hash := ct.enrs.missing[index]
e, err := ct.enrs.resolveNext(ctx, hash) e, err := ct.enrs.resolveNext(ctx, hash)
if err != nil { if err != nil {