Generate QR code

util/util.go

@@ -0,0 +1,40 @@
+package util
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/ngoduykhanh/wireguard-ui/model"
+)
+
+const wgConfigDNS = "1.1.1.1, 8.8.8.8"
+const wgConfigPersistentKeepalive = 15
+const wgConfigEndpoint = "wireguard.example.com:56231"
+const wgConfigServerPublicKey = "/OKCBc8PxIqCpgqlE9G1kSaTecdAvYf3loEwFj6MXDc="
+
+// BuildClientConfig to create wireguard client config string
+func BuildClientConfig(client model.Client) string {
+	// Interface section
+	clientAddress := fmt.Sprintf("Address = %s", strings.Join(client.AllocatedIPs, ","))
+	clientPrivateKey := fmt.Sprintf("PrivateKey = %s", client.PrivateKey)
+	clientDNS := fmt.Sprintf("DNS = %s", wgConfigDNS)
+
+	// Peer section
+	peerPublicKey := fmt.Sprintf("PublicKey = %s", wgConfigServerPublicKey)
+	peerAllowedIPs := fmt.Sprintf("AllowedIPs = %s", strings.Join(client.AllowedIPs, ","))
+	peerEndpoint := fmt.Sprintf("Endpoint = %s", wgConfigEndpoint)
+	peerPersistentKeepalive := fmt.Sprintf("PersistentKeepalive = %d", wgConfigPersistentKeepalive)
+
+	// build the config as string
+	strConfig := "[Interface]\n" +
+		clientAddress + "\n" +
+		clientPrivateKey + "\n" +
+		clientDNS + "\n\n" +
+		"[Peer]" + "\n" +
+		peerPublicKey + "\n" +
+		peerAllowedIPs + "\n" +
+		peerEndpoint + "\n" +
+		peerPersistentKeepalive + "\n"
+
+	return strConfig
+}