feat: support uploading ip addresses certificates

pkg/utils/cert/x509/x509.go

@@ -0,0 +1,35 @@
+package x509
+
+import (
+	"crypto/x509"
+)
+
+// 返回指定 x509.Certificate 对象的主题替代名称。
+//
+// 入参：
+//   - cert: x509.Certificate 对象。
+//
+// 出参：
+//   - 主题替代名称的字符串切片。
+func GetSubjectAltNames(cert *x509.Certificate) []string {
+	sans := make([]string, 0)
+
+	if cert != nil {
+		for _, dnsName := range cert.DNSNames {
+			sans = append(sans, dnsName)
+		}
+		for _, ipAddr := range cert.IPAddresses {
+			sans = append(sans, ipAddr.String())
+		}
+		for _, email := range cert.EmailAddresses {
+			sans = append(sans, email)
+		}
+		for _, uri := range cert.URIs {
+			if uri != nil {
+				sans = append(sans, uri.String())
+			}
+		}
+	}
+
+	return sans
+}