Imports k8s.io/ingress-nginx/internal/ingress k8s.io/ingress-nginx/internal/file github.com/zakjan/cert-chain-resolver/certUtil k8s.io/apimachinery/pkg/util/sets k8s.io/klog Standard library imports crypto/rsa encoding/pem encoding/asn1 bytes crypto/rand crypto/tls crypto/x509 crypto/x509/pkix errors fmt math/big net strconv strings time