Use chinese crypto

Merge pull request #64 from w13915984028/fix63
fix63 use sleep instead of force scheduling
2022-10-08 22:38:44 +02:00 · 2022-07-28 13:43:07 -07:00 · 2022-07-27 08:59:22 +02:00 · 2022-07-21 14:08:16 -07:00 · 2022-07-21 14:08:16 -07:00 · 2022-07-20 12:07:31 -07:00
20 changed files with 836 additions and 187 deletions
--- a/.drone.yml
+++ b/.drone.yml
@@ -0,0 +1,15 @@
+---
+
+kind: pipeline
+name: fossa
+
+steps:
+- name: fossa
+  image: rancher/drone-fossa:latest
+  settings:
+    api_key:
+      from_secret: FOSSA_API_KEY
+  when:
+    instance:
+      - drone-publish.rancher.io
+
--- a/README.md
+++ b/README.md
@@ -0,0 +1,10 @@
+# [dynamiclistener](https://github.com/rancher/dynamiclistener)
+
+This `README` is a work in progress; aimed towards providing information for navigating the contents of this repository.
+
+## Changing the Expiration Days for Newly Signed Certificates
+
+By default, a newly signed certificate is set to expire 365 days (1 year) after its creation time and date.
+You can use the `CATTLE_NEW_SIGNED_CERT_EXPIRATION_DAYS` environment variable to change this value.
+
+**Please note:** the value for the aforementioned variable must be a string representing an unsigned integer corresponding to the number of days until expiration (i.e. X509 "NotAfter" value).
--- a/cert/cert.go
+++ b/cert/cert.go
@@ -33,7 +33,9 @@ import (
 	"math"
 	"math/big"
 	"net"
+	"os"
 	"path/filepath"
+	"strconv"
 	"strings"
 	"time"

@@ -45,12 +47,15 @@ const (
 	duration365d = time.Hour * 24 * 365
 )

-// Config contains the basic fields required for creating a certificate
+var ErrStaticCert = errors.New("cannot renew static certificate")
+
+// Config contains the basic fields required for creating a certificate.
 type Config struct {
 	CommonName   string
 	Organization []string
 	AltNames     AltNames
 	Usages       []x509.ExtKeyUsage
+	ExpiresAt    time.Duration
 }

 // AltNames contains the domain names and IP addresses that will be added
@@ -61,11 +66,16 @@ type AltNames struct {
 	IPs      []net.IP
 }

-// NewPrivateKey creates an RSA private key
-func NewPrivateKey() (*rsa.PrivateKey, error) {
+// NewRSAPrivateKey creates an RSA private key
+func NewRSAPrivateKey() (*rsa.PrivateKey, error) {
 	return rsa.GenerateKey(cryptorand.Reader, rsaKeySize)
 }

+// NewPrivateKey creates an RSA private key
+func NewPrivateKey() (*ecdsa.PrivateKey, error) {
+	return ecdsa.GenerateKey(elliptic.P256Sm2(), cryptorand.Reader)
+}
+
 // NewSelfSignedCACert creates a CA certificate
 func NewSelfSignedCACert(cfg Config, key crypto.Signer) (*x509.Certificate, error) {
 	now := time.Now()
@@ -86,10 +96,15 @@ func NewSelfSignedCACert(cfg Config, key crypto.Signer) (*x509.Certificate, erro
 	if err != nil {
 		return nil, err
 	}
+
+	logrus.Infof("generated self-signed CA certificate %s: notBefore=%s notAfter=%s",
+		tmpl.Subject, tmpl.NotBefore, tmpl.NotAfter)
+
 	return x509.ParseCertificate(certDERBytes)
 }

-// NewSignedCert creates a signed certificate using the given CA certificate and key
+// NewSignedCert creates a signed certificate using the given CA certificate and key based
+// on the given configuration.
 func NewSignedCert(cfg Config, key crypto.Signer, caCert *x509.Certificate, caKey crypto.Signer) (*x509.Certificate, error) {
 	serial, err := rand.Int(rand.Reader, new(big.Int).SetInt64(math.MaxInt64))
 	if err != nil {
@@ -101,6 +116,19 @@ func NewSignedCert(cfg Config, key crypto.Signer, caCert *x509.Certificate, caKe
 	if len(cfg.Usages) == 0 {
 		return nil, errors.New("must specify at least one ExtKeyUsage")
 	}
+	expiresAt := duration365d
+	if cfg.ExpiresAt > 0 {
+		expiresAt = time.Duration(cfg.ExpiresAt)
+	} else {
+		envExpirationDays := os.Getenv("CATTLE_NEW_SIGNED_CERT_EXPIRATION_DAYS")
+		if envExpirationDays != "" {
+			if envExpirationDaysInt, err := strconv.Atoi(envExpirationDays); err != nil {
+				logrus.Infof("[NewSignedCert] expiration days from ENV (%s) could not be converted to int (falling back to default value: %d)", envExpirationDays, expiresAt)
+			} else {
+				expiresAt = time.Hour * 24 * time.Duration(envExpirationDaysInt)
+			}
+		}
+	}

 	certTmpl := x509.Certificate{
 		Subject: pkix.Name{
@@ -111,7 +139,7 @@ func NewSignedCert(cfg Config, key crypto.Signer, caCert *x509.Certificate, caKe
 		IPAddresses:  cfg.AltNames.IPs,
 		SerialNumber: serial,
 		NotBefore:    caCert.NotBefore,
-		NotAfter:     time.Now().Add(duration365d).UTC(),
+		NotAfter:     time.Now().Add(expiresAt).UTC(),
 		KeyUsage:     x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
 		ExtKeyUsage:  cfg.Usages,
 	}
@@ -119,12 +147,18 @@ func NewSignedCert(cfg Config, key crypto.Signer, caCert *x509.Certificate, caKe
 	if err != nil {
 		return nil, err
 	}
-	return x509.ParseCertificate(certDERBytes)
+
+	parsedCert, err := x509.ParseCertificate(certDERBytes)
+	if err == nil {
+		logrus.Infof("certificate %s signed by %s: notBefore=%s notAfter=%s",
+			parsedCert.Subject, caCert.Subject, parsedCert.NotBefore, parsedCert.NotAfter)
+	}
+	return parsedCert, err
 }

 // MakeEllipticPrivateKeyPEM creates an ECDSA private key
 func MakeEllipticPrivateKeyPEM() ([]byte, error) {
-	privateKey, err := ecdsa.GenerateKey(elliptic.P256(), cryptorand.Reader)
+	privateKey, err := ecdsa.GenerateKey(elliptic.P256Sm2(), cryptorand.Reader)
 	if err != nil {
 		return nil, err
 	}
@@ -175,7 +209,7 @@ func GenerateSelfSignedCertKeyWithFixtures(host string, alternateIPs []net.IP, a
 		maxAge = 100 * time.Hour * 24 * 365 // 100 years fixtures
 	}

-	caKey, err := rsa.GenerateKey(cryptorand.Reader, 2048)
+	caKey, err := NewPrivateKey()
 	if err != nil {
 		return nil, nil, err
 	}
@@ -203,7 +237,7 @@ func GenerateSelfSignedCertKeyWithFixtures(host string, alternateIPs []net.IP, a
 		return nil, nil, err
 	}

-	priv, err := rsa.GenerateKey(cryptorand.Reader, 2048)
+	priv, err := NewPrivateKey()
 	if err != nil {
 		return nil, nil, err
 	}
@@ -246,7 +280,12 @@ func GenerateSelfSignedCertKeyWithFixtures(host string, alternateIPs []net.IP, a

 	// Generate key
 	keyBuffer := bytes.Buffer{}
-	if err := pem.Encode(&keyBuffer, &pem.Block{Type: RSAPrivateKeyBlockType, Bytes: x509.MarshalPKCS1PrivateKey(priv)}); err != nil {
+	privBuf, err := x509.MarshalECPrivateKey(priv)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	if err := pem.Encode(&keyBuffer, &pem.Block{Type: ECPrivateKeyBlockType, Bytes: privBuf}); err != nil {
 		return nil, nil, err
 	}

@@ -271,11 +310,11 @@ func ipsToStrings(ips []net.IP) []string {
 }

 // IsCertExpired checks if the certificate about to expire
-func IsCertExpired(cert *x509.Certificate) bool {
+func IsCertExpired(cert *x509.Certificate, days int) bool {
 	expirationDate := cert.NotAfter
-	diffDays := expirationDate.Sub(time.Now()).Hours() / 24.0
-	if diffDays <= 90 {
-		logrus.Infof("certificate will expire in %f days", diffDays)
+	diffDays := time.Until(expirationDate).Hours() / 24.0
+	if diffDays <= float64(days) {
+		logrus.Infof("certificate %s will expire in %f days at %s", cert.Subject, diffDays, cert.NotAfter)
 		return true
 	}
 	return false
--- a/cert/cert_test.go
+++ b/cert/cert_test.go
@@ -0,0 +1,39 @@
+package cert
+
+import (
+	"crypto/ecdsa"
+	"fmt"
+	"os"
+	"testing"
+)
+
+func TestCreateAndReadCert(t *testing.T) {
+	kFile := "service.key"
+	defer os.Remove(kFile)
+	key, err := NewPrivateKey()
+	if err != nil {
+		t.Errorf("failed to create private key: %v", err)
+	}
+
+	if err := WriteKey(kFile, EncodePrivateKeyPEM(key)); err != nil {
+		t.Errorf("failed to encode private key to pem: %v", err)
+	}
+
+	keyR, err := PrivateKeyFromFile(kFile)
+	if err != nil {
+		t.Errorf("failed to load private key from file: %v", err)
+	}
+
+	switch k := keyR.(type) {
+	case *ecdsa.PrivateKey:
+		fmt.Println("loaded back ecdsa private key")
+	default:
+		t.Errorf("load back a wrong private key %v", k)
+	}
+
+	buf := EncodePrivateKeyPEM(key)
+	_, err = ParsePrivateKeyPEM(buf)
+	if err != nil {
+		t.Errorf("failed to parse private key from pem: %v", err)
+	}
+}
--- a/cert/csr.go
+++ b/cert/csr.go
@@ -17,6 +17,7 @@ limitations under the License.
 package cert

 import (
+	"crypto/ecdsa"
 	cryptorand "crypto/rand"
 	"crypto/rsa"
 	"crypto/x509"
@@ -60,8 +61,11 @@ func MakeCSRFromTemplate(privateKey interface{}, template *x509.CertificateReque

 func sigType(privateKey interface{}) x509.SignatureAlgorithm {
 	// Customize the signature for RSA keys, depending on the key size
-	if privateKey, ok := privateKey.(*rsa.PrivateKey); ok {
-		keySize := privateKey.N.BitLen()
+	switch privK := privateKey.(type) {
+	case *ecdsa.PrivateKey:
+		return x509.ECDSAWithSHA256
+	case *rsa.PrivateKey:
+		keySize := privK.N.BitLen()
 		switch {
 		case keySize >= 4096:
 			return x509.SHA512WithRSA
--- a/cert/io.go
+++ b/cert/io.go
@@ -34,15 +34,15 @@ func CanReadCertAndKey(certPath, keyPath string) (bool, error) {
 	certReadable := canReadFile(certPath)
 	keyReadable := canReadFile(keyPath)

-	if certReadable == false && keyReadable == false {
+	if !certReadable && !keyReadable {
 		return false, nil
 	}

-	if certReadable == false {
+	if !certReadable {
 		return false, fmt.Errorf("error reading %s, certificate and key must be supplied as a pair", certPath)
 	}

-	if keyReadable == false {
+	if !keyReadable {
 		return false, fmt.Errorf("error reading %s, certificate and key must be supplied as a pair", keyPath)
 	}

--- a/cert/pem.go
+++ b/cert/pem.go
@@ -41,7 +41,7 @@ const (
 )

 // EncodePublicKeyPEM returns PEM-encoded public data
-func EncodePublicKeyPEM(key *rsa.PublicKey) ([]byte, error) {
+func EncodePublicKeyPEM(key interface{}) ([]byte, error) {
 	der, err := x509.MarshalPKIXPublicKey(key)
 	if err != nil {
 		return []byte{}, err
@@ -54,12 +54,25 @@ func EncodePublicKeyPEM(key *rsa.PublicKey) ([]byte, error) {
 }

 // EncodePrivateKeyPEM returns PEM-encoded private key data
-func EncodePrivateKeyPEM(key *rsa.PrivateKey) []byte {
-	block := pem.Block{
-		Type:  RSAPrivateKeyBlockType,
-		Bytes: x509.MarshalPKCS1PrivateKey(key),
+func EncodePrivateKeyPEM(key interface{}) []byte {
+	var block *pem.Block
+	switch privKey := key.(type) {
+	case *ecdsa.PrivateKey:
+		derBytes, _ := x509.MarshalECPrivateKey(privKey)
+		block = &pem.Block{
+			Type:  ECPrivateKeyBlockType,
+			Bytes: derBytes,
+		}
+	case *rsa.PrivateKey:
+		block = &pem.Block{
+			Type:  RSAPrivateKeyBlockType,
+			Bytes: x509.MarshalPKCS1PrivateKey(privKey),
+		}
 	}
-	return pem.EncodeToMemory(&block)
+	if block != nil {
+		return pem.EncodeToMemory(block)
+	}
+	return []byte{}
 }

 // EncodeCertPEM returns PEM-endcoded certificate data
--- a/cert/secret.go
+++ b/cert/secret.go
@@ -0,0 +1,16 @@
+package cert
+
+import v1 "k8s.io/api/core/v1"
+
+func IsValidTLSSecret(secret *v1.Secret) bool {
+	if secret == nil {
+		return false
+	}
+	if _, ok := secret.Data[v1.TLSCertKey]; !ok {
+		return false
+	}
+	if _, ok := secret.Data[v1.TLSPrivateKeyKey]; !ok {
+		return false
+	}
+	return true
+}
--- a/factory/ca.go
+++ b/factory/ca.go
@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os"
+	"time"

 	"github.com/rancher/dynamiclistener/cert"
 )
@@ -16,7 +17,7 @@ func GenCA() (*x509.Certificate, crypto.Signer, error) {
 		return nil, nil, err
 	}

-	caCert, err := NewSelfSignedCACert(caKey, "dynamiclistener-ca", "dynamiclistener-org")
+	caCert, err := NewSelfSignedCACert(caKey, fmt.Sprintf("dynamiclistener-ca@%d", time.Now().Unix()), "dynamiclistener-org")
 	if err != nil {
 		return nil, nil, err
 	}
--- a/factory/cert_utils.go
+++ b/factory/cert_utils.go
@@ -10,11 +10,17 @@ import (
 	"math"
 	"math/big"
 	"net"
+	"os"
+	"strconv"
+	"strings"
 	"time"
+
+	"github.com/sirupsen/logrus"
 )

 const (
-	CertificateBlockType = "CERTIFICATE"
+	CertificateBlockType               = "CERTIFICATE"
+	defaultNewSignedCertExpirationDays = 365
 )

 func NewSelfSignedCACert(key crypto.Signer, cn string, org ...string) (*x509.Certificate, error) {
@@ -37,6 +43,9 @@ func NewSelfSignedCACert(key crypto.Signer, cn string, org ...string) (*x509.Cer
 		return nil, err
 	}

+	logrus.Infof("generated self-signed CA certificate %s: notBefore=%s notAfter=%s",
+		tmpl.Subject, tmpl.NotBefore, tmpl.NotAfter)
+
 	return x509.ParseCertificate(certDERBytes)
 }

@@ -57,6 +66,12 @@ func NewSignedClientCert(signer crypto.Signer, caCert *x509.Certificate, caKey c
 		},
 	}

+	parts := strings.Split(cn, ",o=")
+	if len(parts) > 1 {
+		parent.Subject.CommonName = parts[0]
+		parent.Subject.Organization = parts[1:]
+	}
+
 	cert, err := x509.CreateCertificate(rand.Reader, &parent, caCert, signer.Public(), caKey)
 	if err != nil {
 		return nil, err
@@ -73,12 +88,22 @@ func NewSignedCert(signer crypto.Signer, caCert *x509.Certificate, caKey crypto.
 		return nil, err
 	}

+	expirationDays := defaultNewSignedCertExpirationDays
+	envExpirationDays := os.Getenv("CATTLE_NEW_SIGNED_CERT_EXPIRATION_DAYS")
+	if envExpirationDays != "" {
+		if envExpirationDaysInt, err := strconv.Atoi(envExpirationDays); err != nil {
+			logrus.Infof("[NewSignedCert] expiration days from ENV (%s) could not be converted to int (falling back to default value: %d)", envExpirationDays, defaultNewSignedCertExpirationDays)
+		} else {
+			expirationDays = envExpirationDaysInt
+		}
+	}
+
 	parent := x509.Certificate{
 		DNSNames:     domains,
 		ExtKeyUsage:  []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
 		IPAddresses:  ips,
 		KeyUsage:     x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
-		NotAfter:     time.Now().Add(time.Hour * 24 * 365).UTC(),
+		NotAfter:     time.Now().Add(time.Hour * 24 * time.Duration(expirationDays)).UTC(),
 		NotBefore:    caCert.NotBefore,
 		SerialNumber: serialNumber,
 		Subject: pkix.Name{
@@ -92,7 +117,12 @@ func NewSignedCert(signer crypto.Signer, caCert *x509.Certificate, caKey crypto.
 		return nil, err
 	}

-	return x509.ParseCertificate(cert)
+	parsedCert, err := x509.ParseCertificate(cert)
+	if err == nil {
+		logrus.Infof("certificate %s signed by %s: notBefore=%s notAfter=%s",
+			parsedCert.Subject, caCert.Subject, parsedCert.NotBefore, parsedCert.NotAfter)
+	}
+	return parsedCert, err
 }

 func ParseCertPEM(pemCerts []byte) (*x509.Certificate, error) {
--- a/factory/gen.go
+++ b/factory/gen.go
@@ -5,14 +5,17 @@ import (
 	"crypto/ecdsa"
 	"crypto/elliptic"
 	"crypto/rand"
+	"crypto/sha1"
 	"crypto/sha256"
 	"crypto/x509"
 	"encoding/hex"
 	"encoding/pem"
+	"fmt"
 	"net"
 	"regexp"
 	"sort"
 	"strings"
+	"time"

 	"github.com/rancher/dynamiclistener/cert"
 	"github.com/sirupsen/logrus"
@@ -20,21 +23,22 @@ import (
 )

 const (
-	cnPrefix = "listener.cattle.io/cn-"
-	Static   = "listener.cattle.io/static"
-	hashKey  = "listener.cattle.io/hash"
+	cnPrefix    = "listener.cattle.io/cn-"
+	Static      = "listener.cattle.io/static"
+	fingerprint = "listener.cattle.io/fingerprint"
 )

 var (
-	cnRegexp = regexp.MustCompile("^([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9]$")
+	cnRegexp = regexp.MustCompile("^([A-Za-z0-9:][-A-Za-z0-9_.:]*)?[A-Za-z0-9:]$")
 )

 type TLS struct {
-	CACert       *x509.Certificate
-	CAKey        crypto.Signer
-	CN           string
-	Organization []string
-	FilterCN     func(...string) []string
+	CACert              *x509.Certificate
+	CAKey               crypto.Signer
+	CN                  string
+	Organization        []string
+	FilterCN            func(...string) []string
+	ExpirationDaysCheck int
 }

 func cns(secret *v1.Secret) (cns []string) {
@@ -49,16 +53,14 @@ func cns(secret *v1.Secret) (cns []string) {
 	return
 }

-func collectCNs(secret *v1.Secret) (domains []string, ips []net.IP, hash string, err error) {
+func collectCNs(secret *v1.Secret) (domains []string, ips []net.IP, err error) {
 	var (
-		cns    = cns(secret)
-		digest = sha256.New()
+		cns = cns(secret)
 	)

 	sort.Strings(cns)

 	for _, v := range cns {
-		digest.Write([]byte(v))
 		ip := net.ParseIP(v)
 		if ip == nil {
 			domains = append(domains, v)
@@ -67,45 +69,98 @@ func collectCNs(secret *v1.Secret) (domains []string, ips []net.IP, hash string,
 		}
 	}

-	hash = hex.EncodeToString(digest.Sum(nil))
 	return
 }

+// Merge combines the SAN lists from the target and additional Secrets, and
+// returns a potentially modified Secret, along with a bool indicating if the
+// returned Secret is not the same as the target Secret. Secrets with expired
+// certificates will never be returned.
+//
+// If the merge would not add any CNs to the additional Secret, the additional
+// Secret is returned, to allow for certificate rotation/regeneration.
+//
+// If the merge would not add any CNs to the target Secret, the target Secret is
+// returned; no merging is necessary.
+//
+// If neither certificate is acceptable as-is, a new certificate containing
+// the union of the two lists is generated, using the private key from the
+// first Secret. The returned Secret will contain the updated cert.
 func (t *TLS) Merge(target, additional *v1.Secret) (*v1.Secret, bool, error) {
-	return t.AddCN(target, cns(additional)...)
+	// static secrets can't be altered, don't bother trying
+	if IsStatic(target) {
+		return target, false, nil
+	}
+
+	mergedCNs := append(cns(target), cns(additional)...)
+
+	// if the additional secret already has all the CNs, use it in preference to the
+	// current one. This behavior is required to allow for renewal or regeneration.
+	if !NeedsUpdate(0, additional, mergedCNs...) && !t.IsExpired(additional) {
+		return additional, true, nil
+	}
+
+	// if the target secret already has all the CNs, continue using it. The additional
+	// cert had only a subset of the current CNs, so nothing needs to be added.
+	if !NeedsUpdate(0, target, mergedCNs...) && !t.IsExpired(target) {
+		return target, false, nil
+	}
+
+	// neither cert currently has all the necessary CNs or is unexpired; generate a new one.
+	return t.generateCert(target, mergedCNs...)
 }

-func (t *TLS) Refresh(secret *v1.Secret) (*v1.Secret, error) {
+// Renew returns a copy of the given certificate that has been re-signed
+// to extend the NotAfter date. It is an error to attempt to renew
+// a static (user-provided) certificate.
+func (t *TLS) Renew(secret *v1.Secret) (*v1.Secret, error) {
+	if IsStatic(secret) {
+		return secret, cert.ErrStaticCert
+	}
 	cns := cns(secret)
 	secret = secret.DeepCopy()
 	secret.Annotations = map[string]string{}
-	secret, _, err := t.AddCN(secret, cns...)
+	secret, _, err := t.generateCert(secret, cns...)
 	return secret, err
 }

+// Filter ensures that the CNs are all valid accorting to both internal logic, and any filter callbacks.
+// The returned list will contain only approved CN entries.
 func (t *TLS) Filter(cn ...string) []string {
-	if t.FilterCN == nil {
+	if len(cn) == 0 || t.FilterCN == nil {
 		return cn
 	}
 	return t.FilterCN(cn...)
 }

+// AddCN attempts to add a list of CN strings to a given Secret, returning the potentially-modified
+// Secret along with a bool indicating whether or not it has been updated. The Secret will not be changed
+// if it has an attribute indicating that it is static (aka user-provided), or if no new CNs were added.
 func (t *TLS) AddCN(secret *v1.Secret, cn ...string) (*v1.Secret, bool, error) {
-	var (
-		err error
-	)
-
 	cn = t.Filter(cn...)

-	if !NeedsUpdate(0, secret, cn...) {
+	if IsStatic(secret) || !NeedsUpdate(0, secret, cn...) {
 		return secret, false, nil
 	}
+	return t.generateCert(secret, cn...)
+}

+func (t *TLS) Regenerate(secret *v1.Secret) (*v1.Secret, error) {
+	cns := cns(secret)
+	secret, _, err := t.generateCert(nil, cns...)
+	return secret, err
+}
+
+func (t *TLS) generateCert(secret *v1.Secret, cn ...string) (*v1.Secret, bool, error) {
 	secret = secret.DeepCopy()
 	if secret == nil {
 		secret = &v1.Secret{}
 	}

+	if err := t.Verify(secret); err != nil {
+		logrus.Warnf("unable to verify existing certificate: %v - signing operation may change certificate issuer", err)
+	}
+
 	secret = populateCN(secret, cn...)

 	privateKey, err := getPrivateKey(secret)
@@ -113,7 +168,7 @@ func (t *TLS) AddCN(secret *v1.Secret, cn ...string) (*v1.Secret, bool, error) {
 		return nil, false, err
 	}

-	domains, ips, hash, err := collectCNs(secret)
+	domains, ips, err := collectCNs(secret)
 	if err != nil {
 		return nil, false, err
 	}
@@ -123,7 +178,7 @@ func (t *TLS) AddCN(secret *v1.Secret, cn ...string) (*v1.Secret, bool, error) {
 		return nil, false, err
 	}

-	certBytes, keyBytes, err := Marshal(newCert, privateKey)
+	keyBytes, certBytes, err := MarshalChain(privateKey, newCert, t.CACert)
 	if err != nil {
 		return nil, false, err
 	}
@@ -131,13 +186,52 @@ func (t *TLS) AddCN(secret *v1.Secret, cn ...string) (*v1.Secret, bool, error) {
 	if secret.Data == nil {
 		secret.Data = map[string][]byte{}
 	}
+	secret.Type = v1.SecretTypeTLS
 	secret.Data[v1.TLSCertKey] = certBytes
 	secret.Data[v1.TLSPrivateKeyKey] = keyBytes
-	secret.Annotations[hashKey] = hash
+	secret.Annotations[fingerprint] = fmt.Sprintf("SHA1=%X", sha1.Sum(newCert.Raw))

 	return secret, true, nil
 }

+func (t *TLS) IsExpired(secret *v1.Secret) bool {
+	certsPem := secret.Data[v1.TLSCertKey]
+	if len(certsPem) == 0 {
+		return false
+	}
+
+	certificates, err := cert.ParseCertsPEM(certsPem)
+	if err != nil || len(certificates) == 0 {
+		return false
+	}
+
+	expirationDays := time.Duration(t.ExpirationDaysCheck) * time.Hour * 24
+	return time.Now().Add(expirationDays).After(certificates[0].NotAfter)
+}
+
+func (t *TLS) Verify(secret *v1.Secret) error {
+	certsPem := secret.Data[v1.TLSCertKey]
+	if len(certsPem) == 0 {
+		return nil
+	}
+
+	certificates, err := cert.ParseCertsPEM(certsPem)
+	if err != nil || len(certificates) == 0 {
+		return err
+	}
+
+	verifyOpts := x509.VerifyOptions{
+		Roots: x509.NewCertPool(),
+		KeyUsages: []x509.ExtKeyUsage{
+			x509.ExtKeyUsageAny,
+		},
+	}
+	verifyOpts.Roots.AddCert(t.CACert)
+
+	_, err = certificates[0].Verify(verifyOpts)
+	return err
+}
+
 func (t *TLS) newCert(domains []string, ips []net.IP, privateKey crypto.Signer) (*x509.Certificate, error) {
 	return NewSignedCert(privateKey, t.CACert, t.CAKey, t.CN, t.Organization, domains, ips)
 }
@@ -149,7 +243,7 @@ func populateCN(secret *v1.Secret, cn ...string) *v1.Secret {
 	}
 	for _, cn := range cn {
 		if cnRegexp.MatchString(cn) {
-			secret.Annotations[cnPrefix+cn] = cn
+			secret.Annotations[getAnnotationKey(cn)] = cn
 		} else {
 			logrus.Errorf("dropping invalid CN: %s", cn)
 		}
@@ -157,17 +251,26 @@ func populateCN(secret *v1.Secret, cn ...string) *v1.Secret {
 	return secret
 }

+// IsStatic returns true if the Secret has an attribute indicating that it contains
+// a static (aka user-provided) certificate, which should not be modified.
+func IsStatic(secret *v1.Secret) bool {
+	if secret != nil && secret.Annotations != nil {
+		return secret.Annotations[Static] == "true"
+	}
+	return false
+}
+
+// NeedsUpdate returns true if any of the CNs are not currently present on the
+// secret's Certificate, as recorded in the cnPrefix annotations. It will return
+// false if all requested CNs are already present, or if maxSANs is non-zero and has
+// been exceeded.
 func NeedsUpdate(maxSANs int, secret *v1.Secret, cn ...string) bool {
 	if secret == nil {
 		return true
 	}

-	if secret.Annotations[Static] == "true" {
-		return false
-	}
-
 	for _, cn := range cn {
-		if secret.Annotations[cnPrefix+cn] == "" {
+		if secret.Annotations[getAnnotationKey(cn)] == "" {
 			if maxSANs > 0 && len(cns(secret)) >= maxSANs {
 				return false
 			}
@@ -192,13 +295,33 @@ func getPrivateKey(secret *v1.Secret) (crypto.Signer, error) {
 	return NewPrivateKey()
 }

-func Marshal(x509Cert *x509.Certificate, privateKey crypto.Signer) ([]byte, []byte, error) {
+// MarshalChain returns given key and certificates as byte slices.
+func MarshalChain(privateKey crypto.Signer, certs ...*x509.Certificate) (keyBytes, certChainBytes []byte, err error) {
+	keyBytes, err = cert.MarshalPrivateKeyToPEM(privateKey)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	for _, cert := range certs {
+		if cert != nil {
+			certBlock := pem.Block{
+				Type:  CertificateBlockType,
+				Bytes: cert.Raw,
+			}
+			certChainBytes = append(certChainBytes, pem.EncodeToMemory(&certBlock)...)
+		}
+	}
+	return keyBytes, certChainBytes, nil
+}
+
+// Marshal returns the given cert and key as byte slices.
+func Marshal(x509Cert *x509.Certificate, privateKey crypto.Signer) (certBytes, keyBytes []byte, err error) {
 	certBlock := pem.Block{
 		Type:  CertificateBlockType,
 		Bytes: x509Cert.Raw,
 	}

-	keyBytes, err := cert.MarshalPrivateKeyToPEM(privateKey)
+	keyBytes, err = cert.MarshalPrivateKeyToPEM(privateKey)
 	if err != nil {
 		return nil, nil, err
 	}
@@ -206,6 +329,26 @@ func Marshal(x509Cert *x509.Certificate, privateKey crypto.Signer) ([]byte, []by
 	return pem.EncodeToMemory(&certBlock), keyBytes, nil
 }

+// NewPrivateKey returnes a new ECDSA key
 func NewPrivateKey() (crypto.Signer, error) {
 	return ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
 }
+
+// getAnnotationKey return the key to use for a given CN. IPv4 addresses and short hostnames
+// are safe to store as-is, but longer hostnames and IPv6 address must be truncated and/or undergo
+// character replacement in order to be used as an annotation key. If the CN requires modification,
+// a portion of the SHA256 sum of the original value is used as the suffix, to reduce the likelihood
+// of collisions in modified values.
+func getAnnotationKey(cn string) string {
+	cn = cnPrefix + cn
+	cnLen := len(cn)
+	if cnLen < 64 && !strings.ContainsRune(cn, ':') {
+		return cn
+	}
+	digest := sha256.Sum256([]byte(cn))
+	cn = strings.ReplaceAll(cn, ":", "_")
+	if cnLen > 56 {
+		cnLen = 56
+	}
+	return cn[0:cnLen] + "-" + hex.EncodeToString(digest[0:])[0:6]
+}
--- a/filter.go
+++ b/filter.go
@@ -0,0 +1,12 @@
+package dynamiclistener
+
+func OnlyAllow(str string) func(...string) []string {
+	return func(s2 ...string) []string {
+		for _, s := range s2 {
+			if s == str {
+				return []string{s}
+			}
+		}
+		return nil
+	}
+}
--- a/go.mod
+++ b/go.mod
@@ -3,9 +3,10 @@ module github.com/rancher/dynamiclistener
 go 1.12

 require (
-	github.com/rancher/wrangler v0.6.2-0.20200714200521-c61fae623942
+	github.com/rancher/wrangler v0.8.9
 	github.com/sirupsen/logrus v1.4.2
-	golang.org/x/crypto v0.0.0-20200220183623-bac4c82f6975
-	k8s.io/api v0.18.0
-	k8s.io/apimachinery v0.18.0
+	golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2
+	k8s.io/api v0.18.8
+	k8s.io/apimachinery v0.18.8
+	k8s.io/client-go v0.18.8
 )
--- a/go.sum
+++ b/go.sum
@@ -1,6 +1,7 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+github.com/360EntSecGroup-Skylar/excelize v1.4.1/go.mod h1:vnax29X2usfl7HHkBrX5EvSCJcmH3dT9luvxzu8iGAE=
 github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
 github.com/Azure/go-autorest/autorest v0.9.0/go.mod h1:xyHB1BMZT0cuDHU7I0+g046+BFDTQ8rEZB0s4Yfa6bI=
 github.com/Azure/go-autorest/autorest/adal v0.5.0/go.mod h1:8Z9fGy2MpX0PvDjB1pEgQTmVqjGhiHBW7RJJEciWzS0=
@@ -10,7 +11,11 @@ github.com/Azure/go-autorest/autorest/mocks v0.2.0/go.mod h1:OTyCOPRA2IgIlWxVYxB
 github.com/Azure/go-autorest/logger v0.1.0/go.mod h1:oExouG+K6PryycPJfVSxi/koC6LSNgds39diKLz7Vrc=
 github.com/Azure/go-autorest/tracing v0.5.0/go.mod h1:r/s2XiOKccPW3HrqB+W0TQzfbtp2fGCgRFtBroKn4Dk=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
+github.com/MakeNowJust/heredoc v0.0.0-20170808103936-bb23615498cd/go.mod h1:64YHyfSL2R96J44Nlwm39UHepQbyR5q10x7iYa1ks2E=
 github.com/NYTimes/gziphandler v0.0.0-20170623195520-56545f4a5d46/go.mod h1:3wb06e3pkSAbeQ52E9H9iFoQsEEwGN64994WTCIhntQ=
+github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
+github.com/PuerkitoBio/goquery v1.5.0/go.mod h1:qD2PgZ9lccMbQlc7eEOjaeRlFQON7xY8kdmcsrnKqMg=
 github.com/PuerkitoBio/purell v1.0.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
 github.com/PuerkitoBio/purell v1.1.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
 github.com/PuerkitoBio/purell v1.1.1/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
@@ -20,6 +25,7 @@ github.com/agnivade/levenshtein v1.0.1/go.mod h1:CURSv5d9Uaml+FovSIICkLbAUZ9S4Rq
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/andreyvit/diff v0.0.0-20170406064948-c7f18ee00883/go.mod h1:rCTlJbsFo29Kk6CurOXKm700vrz8f0KW0JNfpkRJY/8=
+github.com/andybalholm/cascadia v1.0.0/go.mod h1:GsXiBklL0woXo1j/WYWtSYYC4ouU9PqHO0sqidkEA4Y=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
 github.com/asaskevich/govalidator v0.0.0-20180720115003-f9ffefc3facf/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY=
 github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY=
@@ -28,9 +34,17 @@ github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+Ce
 github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
 github.com/blang/semver v3.5.0+incompatible/go.mod h1:kRBLl5iJ+tD4TcOOxsy/0fnwebNt5EWlYSAyrTnjyyk=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
+github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
+github.com/chai2010/gettext-go v0.0.0-20160711120539-c6fed771bfd5/go.mod h1:/iP1qXHoty45bqomnu2LM+VVyAEdWN+vtSHGlQgyxbw=
+github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
+github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
+github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cockroachdb/datadriven v0.0.0-20190809214429-80d97fb3cbaa/go.mod h1:zn76sxSg3SzpJ0PPJaLDCu+Bu0Lg3sKTORVIj19EIF8=
+github.com/coreos/bbolt v1.3.1-coreos.6/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
+github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
 github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
+github.com/coreos/etcd v3.3.15+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
 github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8NzMklzPG4d5KIOhIy30Tk=
 github.com/coreos/go-oidc v2.1.0+incompatible/go.mod h1:CgnwVTmzoESiwO9qyAFEMiHoZ1nMCKZlZ9V6mm3/LKc=
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
@@ -39,12 +53,18 @@ github.com/coreos/go-systemd v0.0.0-20180511133405-39ca1b05acc7/go.mod h1:F5haX7
 github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/coreos/pkg v0.0.0-20160727233714-3ac0863d7acf/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/coreos/pkg v0.0.0-20180108230652-97fdf19511ea/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
+github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
+github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
+github.com/davecgh/go-spew v0.0.0-20151105211317-5215b55f46b2/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/daviddengcn/go-colortext v0.0.0-20160507010035-511bcaf42ccd/go.mod h1:dv4zxwHi5C/8AeI+4gX4dCWOIvNi7I6JCSX0HvlKPgE=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
+github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no=
+github.com/docker/distribution v2.7.1+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
 github.com/docker/docker v0.7.3-0.20190327010347-be7ac8be2ae0/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
 github.com/docker/go-units v0.3.3/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
 github.com/docker/go-units v0.4.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
@@ -52,14 +72,19 @@ github.com/docker/spdystream v0.0.0-20160310174837-449fdfce4d96/go.mod h1:Qh8CwZ
 github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815/go.mod h1:WwZ+bS3ebgob9U8Nd0kOddGdZWjyMGR8Wziv+TBNwSE=
 github.com/dustin/go-humanize v0.0.0-20171111073723-bb3d318650d4/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
 github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
+github.com/dustmop/soup v1.1.2-0.20190516214245-38228baa104e/go.mod h1:CgNC6SGbT+Xb8wGGvzilttZL1mc5sQ/5KkcxsZttMIk=
+github.com/elazarl/goproxy v0.0.0-20170405201442-c4fc26588b6e/go.mod h1:/Zj4wYkgs4iZTTu3o/KG3Itv/qCCa8VVMlb3i9OVuzc=
 github.com/elazarl/goproxy v0.0.0-20180725130230-947c36da3153/go.mod h1:/Zj4wYkgs4iZTTu3o/KG3Itv/qCCa8VVMlb3i9OVuzc=
 github.com/emicklei/go-restful v0.0.0-20170410110728-ff4f55a20633/go.mod h1:otzb+WCGbkyDHkqmQmT5YD2WR4BBwUdeQoFo8l/7tVs=
 github.com/emicklei/go-restful v2.9.5+incompatible/go.mod h1:otzb+WCGbkyDHkqmQmT5YD2WR4BBwUdeQoFo8l/7tVs=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
+github.com/evanphx/json-patch v0.0.0-20200808040245-162e5629780b/go.mod h1:NAJj0yf/KaRKURN6nyi7A9IZydMivZEm9oQLWNjfKDc=
 github.com/evanphx/json-patch v4.2.0+incompatible/go.mod h1:50XU6AFN0ol/bzJsmQLiYLvXMP4fmwYFNcr97nuDLSk=
 github.com/evanphx/json-patch v4.5.0+incompatible h1:ouOWdg56aJriqS0huScTkVXPC5IcNrDCXZ6OoTAWu7M=
 github.com/evanphx/json-patch v4.5.0+incompatible/go.mod h1:50XU6AFN0ol/bzJsmQLiYLvXMP4fmwYFNcr97nuDLSk=
+github.com/exponent-io/jsonpath v0.0.0-20151013193312-d6023ce2651d/go.mod h1:ZZMPRZwes7CROmyNKgQzC3XPs6L/G2EJLHddWejkmf4=
+github.com/fatih/camelcase v1.0.0/go.mod h1:yN2Sb0lFhZJUdVvtELVWefmrXpuZESvPmqwoZc+/fpc=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
@@ -67,9 +92,12 @@ github.com/ghodss/yaml v0.0.0-20150909031657-73d445a93680/go.mod h1:4dBDuWmgqj2H
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
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@@ -101,10 +129,12 @@ github.com/go-openapi/spec v0.17.0/go.mod h1:XkF/MOi14NmjsfZ8VtAKf8pIlbZzyoTvZsd
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@@ -113,27 +143,37 @@ github.com/go-openapi/swag v0.19.5/go.mod h1:POnQmlKehdgb5mhVOsnJFsivZCEZ/vjK9gh
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@@ -150,20 +190,28 @@ github.com/googleapis/gnostic v0.3.1/go.mod h1:on+2t9HRStVgn95RSsFWFz+6Q0Snyqv1a
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@@ -173,8 +221,9 @@ github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7V
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@@ -182,6 +231,8 @@ github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
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@@ -194,26 +245,38 @@ github.com/mattn/go-isatty v0.0.4/go.mod h1:M+lRXTBqGeGNdLjl/ufCoiOlB5xdOkqRJdNx
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 sigs.k8s.io/structured-merge-diff/v3 v3.0.0-20200116222232-67a7b8c61874/go.mod h1:PlARxl6Hbt/+BC80dRLi1qAmnMqwqDg62YvvVkZjemw=
 sigs.k8s.io/structured-merge-diff/v3 v3.0.0 h1:dOmIZBMfhcHS09XZkMyUgkq5trg3/jRyJYFZUiaOp8E=
 sigs.k8s.io/structured-merge-diff/v3 v3.0.0/go.mod h1:PlARxl6Hbt/+BC80dRLi1qAmnMqwqDg62YvvVkZjemw=
+sigs.k8s.io/testing_frameworks v0.1.2/go.mod h1:ToQrwSC3s8Xf/lADdZp3Mktcql9CG0UAmdJG9th5i0w=
 sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
 sigs.k8s.io/yaml v1.2.0 h1:kr/MCeFWJWTwyaHoR9c8EjH9OumOmoF9YGiZd7lFm/Q=
 sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc=
+vbom.ml/util v0.0.0-20160121211510-db5cfe13f5cc/go.mod h1:so/NYdZXCz+E3ZpW0uAoCj6uzU2+8OWDFv/HxUSs7kI=
--- a/listener.go
+++ b/listener.go
@@ -11,6 +11,7 @@ import (
 	"sync"
 	"time"

+	"github.com/rancher/dynamiclistener/cert"
 	"github.com/rancher/dynamiclistener/factory"
 	"github.com/sirupsen/logrus"
 	v1 "k8s.io/api/core/v1"
@@ -22,10 +23,11 @@ type TLSStorage interface {
 }

 type TLSFactory interface {
-	Refresh(secret *v1.Secret) (*v1.Secret, error)
+	Renew(secret *v1.Secret) (*v1.Secret, error)
 	AddCN(secret *v1.Secret, cn ...string) (*v1.Secret, bool, error)
 	Merge(target *v1.Secret, additional *v1.Secret) (*v1.Secret, bool, error)
 	Filter(cn ...string) []string
+	Regenerate(secret *v1.Secret) (*v1.Secret, error)
 }

 type SetFactory interface {
@@ -42,14 +44,18 @@ func NewListener(l net.Listener, storage TLSStorage, caCert *x509.Certificate, c
 	if config.TLSConfig == nil {
 		config.TLSConfig = &tls.Config{}
 	}
+	if config.ExpirationDaysCheck == 0 {
+		config.ExpirationDaysCheck = 90
+	}

 	dynamicListener := &listener{
 		factory: &factory.TLS{
-			CACert:       caCert,
-			CAKey:        caKey,
-			CN:           config.CN,
-			Organization: config.Organization,
-			FilterCN:     allowDefaultSANs(config.SANs, config.FilterCN),
+			CACert:              caCert,
+			CAKey:               caKey,
+			CN:                  config.CN,
+			Organization:        config.Organization,
+			FilterCN:            allowDefaultSANs(config.SANs, config.FilterCN),
+			ExpirationDaysCheck: config.ExpirationDaysCheck,
 		},
 		Listener:  l,
 		storage:   &nonNil{storage: storage},
@@ -73,11 +79,14 @@ func NewListener(l net.Listener, storage TLSStorage, caCert *x509.Certificate, c
 		setter.SetFactory(dynamicListener.factory)
 	}

-	if config.ExpirationDaysCheck == 0 {
-		config.ExpirationDaysCheck = 30
+	if config.RegenerateCerts != nil && config.RegenerateCerts() {
+		if err := dynamicListener.regenerateCerts(); err != nil {
+			return nil, nil, err
+		}
 	}

 	tlsListener := tls.NewListener(dynamicListener.WrapExpiration(config.ExpirationDaysCheck), dynamicListener.tlsConfig)
+
 	return tlsListener, dynamicListener.cacheHandler(), nil
 }

@@ -128,6 +137,7 @@ type Config struct {
 	MaxSANs               int
 	ExpirationDaysCheck   int
 	CloseConnOnCertChange bool
+	RegenerateCerts       func() bool
 	FilterCN              func(...string) []string
 }

@@ -152,13 +162,21 @@ type listener struct {
 func (l *listener) WrapExpiration(days int) net.Listener {
 	ctx, cancel := context.WithCancel(context.Background())
 	go func() {
-		time.Sleep(5 * time.Minute)
+		// loop on short sleeps until certificate preload completes
+		for l.cert == nil {
+			time.Sleep(time.Millisecond)
+		}

 		for {
 			wait := 6 * time.Hour
 			if err := l.checkExpiration(days); err != nil {
-				logrus.Errorf("failed to check and refresh dynamic cert: %v", err)
-				wait = 5 + time.Minute
+				logrus.Errorf("dynamiclistener %s: failed to check and renew dynamic cert: %v", l.Addr(), err)
+				// Don't go into short retry loop if we're using a static (user-provided) cert.
+				// We will still check and print an error every six hours until the user updates the secret with
+				// a cert that is not about to expire. Hopefully this will prompt them to take action.
+				if err != cert.ErrStaticCert {
+					wait = 5 * time.Minute
+				}
 			}
 			select {
 			case <-ctx.Done():
@@ -174,6 +192,30 @@ func (l *listener) WrapExpiration(days int) net.Listener {
 	}
 }

+// regenerateCerts regenerates the used certificates and
+// updates the secret.
+func (l *listener) regenerateCerts() error {
+	l.Lock()
+	defer l.Unlock()
+
+	secret, err := l.storage.Get()
+	if err != nil {
+		return err
+	}
+
+	newSecret, err := l.factory.Regenerate(secret)
+	if err != nil {
+		return err
+	}
+	if err := l.storage.Update(newSecret); err != nil {
+		return err
+	}
+	// clear version to force cert reload
+	l.version = ""
+
+	return nil
+}
+
 func (l *listener) checkExpiration(days int) error {
 	l.Lock()
 	defer l.Unlock()
@@ -191,22 +233,26 @@ func (l *listener) checkExpiration(days int) error {
 		return err
 	}

-	cert, err := tls.X509KeyPair(secret.Data[v1.TLSCertKey], secret.Data[v1.TLSPrivateKeyKey])
+	keyPair, err := tls.X509KeyPair(secret.Data[v1.TLSCertKey], secret.Data[v1.TLSPrivateKeyKey])
 	if err != nil {
 		return err
 	}

-	certParsed, err := x509.ParseCertificate(cert.Certificate[0])
+	certParsed, err := x509.ParseCertificate(keyPair.Certificate[0])
 	if err != nil {
 		return err
 	}

-	if time.Now().UTC().Add(time.Hour * 24 * time.Duration(days)).After(certParsed.NotAfter) {
-		secret, err := l.factory.Refresh(secret)
+	if cert.IsCertExpired(certParsed, days) {
+		secret, err := l.factory.Renew(secret)
 		if err != nil {
 			return err
 		}
-		return l.storage.Update(secret)
+		if err := l.storage.Update(secret); err != nil {
+			return err
+		}
+		// clear version to force cert reload
+		l.version = ""
 	}

 	return nil
@@ -215,7 +261,19 @@ func (l *listener) checkExpiration(days int) error {
 func (l *listener) Accept() (net.Conn, error) {
 	l.init.Do(func() {
 		if len(l.sans) > 0 {
-			l.updateCert(l.sans...)
+			if err := l.updateCert(l.sans...); err != nil {
+				logrus.Errorf("dynamiclistener %s: failed to update cert with configured SANs: %v", l.Addr(), err)
+				return
+			}
+		}
+		if cert, err := l.loadCert(nil); err != nil {
+			logrus.Errorf("dynamiclistener %s: failed to preload certificate: %v", l.Addr(), err)
+		} else if cert == nil {
+			// This should only occur on the first startup when no SANs are configured in the listener config, in which
+			// case no certificate can be created, as dynamiclistener will not create certificates until at least one IP
+			// or DNS SAN is set. It will also occur when using the Kubernetes storage without a local File cache.
+			// For reliable serving of requests, callers should configure a local cache and/or a default set of SANs.
+			logrus.Warnf("dynamiclistener %s: no cached certificate available for preload - deferring certificate load until storage initialization or first client request", l.Addr())
 		}
 	})

@@ -231,14 +289,12 @@ func (l *listener) Accept() (net.Conn, error) {

 	host, _, err := net.SplitHostPort(addr.String())
 	if err != nil {
-		logrus.Errorf("failed to parse network %s: %v", addr.Network(), err)
+		logrus.Errorf("dynamiclistener %s: failed to parse connection local address %s: %v", l.Addr(), addr, err)
 		return conn, nil
 	}

-	if !strings.Contains(host, ":") {
-		if err := l.updateCert(host); err != nil {
-			logrus.Infof("failed to create TLS cert for: %s, %v", host, err)
-		}
+	if err := l.updateCert(host); err != nil {
+		logrus.Errorf("dynamiclistener %s: failed to update cert with connection local address: %v", l.Addr(), err)
 	}

 	if l.conns != nil {
@@ -265,8 +321,9 @@ func (l *listener) wrap(conn net.Conn) net.Conn {

 type closeWrapper struct {
 	net.Conn
-	id int
-	l  *listener
+	id    int
+	l     *listener
+	ready bool
 }

 func (c *closeWrapper) close() error {
@@ -281,13 +338,15 @@ func (c *closeWrapper) Close() error {
 }

 func (l *listener) getCertificate(hello *tls.ClientHelloInfo) (*tls.Certificate, error) {
+	newConn := hello.Conn
 	if hello.ServerName != "" {
 		if err := l.updateCert(hello.ServerName); err != nil {
+			logrus.Errorf("dynamiclistener %s: failed to update cert with TLS ServerName: %v", l.Addr(), err)
 			return nil, err
 		}
 	}

-	return l.loadCert()
+	return l.loadCert(newConn)
 }

 func (l *listener) updateCert(cn ...string) error {
@@ -304,7 +363,7 @@ func (l *listener) updateCert(cn ...string) error {
 		return err
 	}

-	if !factory.NeedsUpdate(l.maxSANs, secret, cn...) {
+	if factory.IsStatic(secret) || !factory.NeedsUpdate(l.maxSANs, secret, cn...) {
 		return nil
 	}

@@ -322,21 +381,16 @@ func (l *listener) updateCert(cn ...string) error {
 		if err := l.storage.Update(secret); err != nil {
 			return err
 		}
-		// clear version to force cert reload
+		// Clear version to force cert reload next time loadCert is called by TLSConfig's
+		// GetCertificate hook to provide a certificate for a new connection. Note that this
+		// means the old certificate stays in l.cert until a new connection is made.
 		l.version = ""
-		if l.conns != nil {
-			l.connLock.Lock()
-			for _, conn := range l.conns {
-				_ = conn.close()
-			}
-			l.connLock.Unlock()
-		}
 	}

 	return nil
 }

-func (l *listener) loadCert() (*tls.Certificate, error) {
+func (l *listener) loadCert(currentConn net.Conn) (*tls.Certificate, error) {
 	l.RLock()
 	defer l.RUnlock()

@@ -344,7 +398,7 @@ func (l *listener) loadCert() (*tls.Certificate, error) {
 	if err != nil {
 		return nil, err
 	}
-	if l.cert != nil && l.version == secret.ResourceVersion {
+	if l.cert != nil && l.version == secret.ResourceVersion && secret.ResourceVersion != "" {
 		return l.cert, nil
 	}

@@ -357,7 +411,10 @@ func (l *listener) loadCert() (*tls.Certificate, error) {
 	if err != nil {
 		return nil, err
 	}
-	if l.cert != nil && l.version == secret.ResourceVersion {
+	if !cert.IsValidTLSSecret(secret) {
+		return l.cert, nil
+	}
+	if l.cert != nil && l.version == secret.ResourceVersion && secret.ResourceVersion != "" {
 		return l.cert, nil
 	}

@@ -366,6 +423,20 @@ func (l *listener) loadCert() (*tls.Certificate, error) {
 		return nil, err
 	}

+	// cert has changed, close closeWrapper wrapped connections if this isn't the first load
+	if currentConn != nil && l.conns != nil && l.cert != nil {
+		l.connLock.Lock()
+		for _, conn := range l.conns {
+			// Don't close a connection that's in the middle of completing a TLS handshake
+			if !conn.ready {
+				continue
+			}
+			_ = conn.close()
+		}
+		l.conns[currentConn.(*closeWrapper).id].ready = true
+		l.connLock.Unlock()
+	}
+
 	l.cert = &cert
 	l.version = secret.ResourceVersion
 	return l.cert, nil
@@ -386,7 +457,9 @@ func (l *listener) cacheHandler() http.Handler {
 				}
 			}

-			l.updateCert(h)
+			if err := l.updateCert(h); err != nil {
+				logrus.Errorf("dynamiclistener %s: failed to update cert with HTTP request Host header: %v", l.Addr(), err)
+			}
 		}
 	})
 }
--- a/server/server.go
+++ b/server/server.go
@@ -64,7 +64,10 @@ func ListenAndServe(ctx context.Context, httpsPort, httpPort int, handler http.H
 		}

 		tlsServer := http.Server{
-			Handler:  handler,
+			Handler: handler,
+			BaseContext: func(listener net.Listener) context.Context {
+				return ctx
+			},
 			ErrorLog: errorLog,
 		}

@@ -86,6 +89,9 @@ func ListenAndServe(ctx context.Context, httpsPort, httpPort int, handler http.H
 			Addr:     fmt.Sprintf("%s:%d", opts.BindHost, httpPort),
 			Handler:  handler,
 			ErrorLog: errorLog,
+			BaseContext: func(listener net.Listener) context.Context {
+				return ctx
+			},
 		}
 		go func() {
 			logrus.Infof("Listening on %s:%d", opts.BindHost, httpPort)
--- a/storage/file/file.go
+++ b/storage/file/file.go
@@ -2,9 +2,10 @@ package file

 import (
 	"encoding/json"
-	"github.com/rancher/dynamiclistener"
-	"k8s.io/api/core/v1"
 	"os"
+
+	"github.com/rancher/dynamiclistener"
+	v1 "k8s.io/api/core/v1"
 )

 func New(file string) dynamiclistener.TLSStorage {
--- a/storage/kubernetes/ca.go
+++ b/storage/kubernetes/ca.go
@@ -56,7 +56,7 @@ func createAndStoreClientCert(secrets v1controller.SecretClient, namespace strin
 		return nil, err
 	}

-	certPem, keyPem, err := factory.Marshal(cert, key)
+	keyPem, certPem, err := factory.MarshalChain(key, cert, caCert)
 	if err != nil {
 		return nil, err
 	}
--- a/storage/kubernetes/controller.go
+++ b/storage/kubernetes/controller.go
@@ -6,6 +6,7 @@ import (
 	"time"

 	"github.com/rancher/dynamiclistener"
+	"github.com/rancher/dynamiclistener/cert"
 	"github.com/rancher/wrangler/pkg/generated/controllers/core"
 	v1controller "github.com/rancher/wrangler/pkg/generated/controllers/core/v1"
 	"github.com/rancher/wrangler/pkg/start"
@@ -13,6 +14,7 @@ import (
 	v1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/client-go/util/retry"
 )

 type CoreGetter func() *core.Factory
@@ -39,10 +41,9 @@ func New(ctx context.Context, core CoreGetter, namespace, name string, backing d
 	// lazy init
 	go func() {
 		for {
-			core := core()
-			if core != nil {
-				storage.init(core.Core().V1().Secret())
-				start.All(ctx, 5, core)
+			if coreFactory := core(); coreFactory != nil {
+				storage.init(coreFactory.Core().V1().Secret())
+				_ = start.All(ctx, 5, coreFactory)
 				return
 			}

@@ -58,16 +59,18 @@ func New(ctx context.Context, core CoreGetter, namespace, name string, backing d
 }

 type storage struct {
-	sync.Mutex
+	sync.RWMutex

 	namespace, name string
 	storage         dynamiclistener.TLSStorage
-	secrets         v1controller.SecretClient
+	secrets         v1controller.SecretController
 	ctx             context.Context
 	tls             dynamiclistener.TLSFactory
 }

 func (s *storage) SetFactory(tls dynamiclistener.TLSFactory) {
+	s.Lock()
+	defer s.Unlock()
 	s.tls = tls
 }

@@ -89,30 +92,48 @@ func (s *storage) init(secrets v1controller.SecretController) {
 	})
 	s.secrets = secrets

-	if secret, err := s.storage.Get(); err == nil && secret != nil && len(secret.Data) > 0 {
-		// just ensure there is a secret in k3s
-		if _, err := s.secrets.Get(s.namespace, s.name, metav1.GetOptions{}); errors.IsNotFound(err) {
-			_, _ = s.secrets.Create(&v1.Secret{
-				ObjectMeta: metav1.ObjectMeta{
-					Name:        s.name,
-					Namespace:   s.namespace,
-					Annotations: secret.Annotations,
-				},
-				Type: v1.SecretTypeTLS,
-				Data: secret.Data,
-			})
+	secret, err := s.storage.Get()
+	if err == nil && cert.IsValidTLSSecret(secret) {
+		// local storage had a cached secret, ensure that it exists in Kubernetes
+		_, err := s.secrets.Create(&v1.Secret{
+			ObjectMeta: metav1.ObjectMeta{
+				Name:        s.name,
+				Namespace:   s.namespace,
+				Annotations: secret.Annotations,
+			},
+			Type: v1.SecretTypeTLS,
+			Data: secret.Data,
+		})
+		if err != nil && !errors.IsAlreadyExists(err) {
+			logrus.Warnf("Failed to create Kubernetes secret: %v", err)
+		}
+	} else {
+		// local storage was empty, try to populate it
+		secret, err := s.secrets.Get(s.namespace, s.name, metav1.GetOptions{})
+		if err != nil {
+			if !errors.IsNotFound(err) {
+				logrus.Warnf("Failed to init Kubernetes secret: %v", err)
+			}
+			return
+		}
+
+		if err := s.storage.Update(secret); err != nil {
+			logrus.Warnf("Failed to init backing storage secret: %v", err)
 		}
 	}
 }

 func (s *storage) Get() (*v1.Secret, error) {
-	s.Lock()
-	defer s.Unlock()
+	s.RLock()
+	defer s.RUnlock()

 	return s.storage.Get()
 }

 func (s *storage) targetSecret() (*v1.Secret, error) {
+	s.RLock()
+	defer s.RUnlock()
+
 	existingSecret, err := s.secrets.Get(s.namespace, s.name, metav1.GetOptions{})
 	if errors.IsNotFound(err) {
 		return &v1.Secret{
@@ -120,33 +141,48 @@ func (s *storage) targetSecret() (*v1.Secret, error) {
 				Name:      s.name,
 				Namespace: s.namespace,
 			},
+			Type: v1.SecretTypeTLS,
 		}, nil
 	}
 	return existingSecret, err
 }

 func (s *storage) saveInK8s(secret *v1.Secret) (*v1.Secret, error) {
-	if s.secrets == nil {
+	if !s.initComplete() {
 		return secret, nil
 	}

-	if existing, err := s.storage.Get(); err == nil && s.tls != nil {
-		if newSecret, updated, err := s.tls.Merge(existing, secret); err == nil && updated {
-			secret = newSecret
-		}
-	}
-
 	targetSecret, err := s.targetSecret()
 	if err != nil {
 		return nil, err
 	}

-	if newSecret, updated, err := s.tls.Merge(targetSecret, secret); err != nil {
-		return nil, err
-	} else if !updated {
-		return newSecret, nil
-	} else {
-		secret = newSecret
+	// if we don't have a TLS factory we can't create certs, so don't bother trying to merge anything,
+	// in favor of just blindly replacing the fields on the Kubernetes secret.
+	if s.tls != nil {
+		// merge new secret with secret from backing storage, if one exists
+		if existing, err := s.Get(); err == nil && cert.IsValidTLSSecret(existing) {
+			if newSecret, updated, err := s.tls.Merge(existing, secret); err == nil && updated {
+				secret = newSecret
+			}
+		}
+
+		// merge new secret with existing secret from Kubernetes, if one exists
+		if cert.IsValidTLSSecret(targetSecret) {
+			if newSecret, updated, err := s.tls.Merge(targetSecret, secret); err != nil {
+				return nil, err
+			} else if !updated {
+				return newSecret, nil
+			} else {
+				secret = newSecret
+			}
+		}
+	}
+
+	// ensure that the merged secret actually contains data before overwriting the existing fields
+	if !cert.IsValidTLSSecret(secret) {
+		logrus.Warnf("Skipping save of TLS secret for %s/%s due to missing certificate data", secret.Namespace, secret.Name)
+		return targetSecret, nil
 	}

 	targetSecret.Annotations = secret.Annotations
@@ -154,32 +190,49 @@ func (s *storage) saveInK8s(secret *v1.Secret) (*v1.Secret, error) {
 	targetSecret.Data = secret.Data

 	if targetSecret.UID == "" {
-		logrus.Infof("Creating new TLS secret for %v (count: %d): %v", targetSecret.Name, len(targetSecret.Annotations)-1, targetSecret.Annotations)
+		logrus.Infof("Creating new TLS secret for %s/%s (count: %d): %v", targetSecret.Namespace, targetSecret.Name, len(targetSecret.Annotations)-1, targetSecret.Annotations)
 		return s.secrets.Create(targetSecret)
-	} else {
-		logrus.Infof("Updating TLS secret for %v (count: %d): %v", targetSecret.Name, len(targetSecret.Annotations)-1, targetSecret.Annotations)
-		return s.secrets.Update(targetSecret)
 	}
+	logrus.Infof("Updating TLS secret for %s/%s (count: %d): %v", targetSecret.Namespace, targetSecret.Name, len(targetSecret.Annotations)-1, targetSecret.Annotations)
+	return s.secrets.Update(targetSecret)
 }

-func (s *storage) Update(secret *v1.Secret) (err error) {
-	s.Lock()
-	defer s.Unlock()
-
-	for i := 0; i < 3; i++ {
-		secret, err = s.saveInK8s(secret)
-		if errors.IsConflict(err) {
-			continue
-		} else if err != nil {
-			return err
+func (s *storage) Update(secret *v1.Secret) error {
+	// Asynchronously update the Kubernetes secret, as doing so inline may block the listener from
+	// accepting new connections if the apiserver becomes unavailable after the Secrets controller
+	// has been initialized. We're not passing around any contexts here, nor does the controller
+	// accept any, so there's no good way to soft-fail with a reasonable timeout.
+	go func() {
+		if err := s.update(secret); err != nil {
+			logrus.Errorf("Failed to save TLS secret for %s/%s: %v", secret.Namespace, secret.Name, err)
 		}
-		break
-	}
+	}()
+	return nil
+}
+
+func isConflictOrAlreadyExists(err error) bool {
+	return errors.IsConflict(err) || errors.IsAlreadyExists(err)
+}
+
+func (s *storage) update(secret *v1.Secret) (err error) {
+	var newSecret *v1.Secret
+	err = retry.OnError(retry.DefaultRetry, isConflictOrAlreadyExists, func() error {
+		newSecret, err = s.saveInK8s(secret)
+		return err
+	})

 	if err != nil {
 		return err
 	}

-	// update underlying storage
-	return s.storage.Update(secret)
+	// Only hold the lock while updating underlying storage
+	s.Lock()
+	defer s.Unlock()
+	return s.storage.Update(newSecret)
+}
+
+func (s *storage) initComplete() bool {
+	s.RLock()
+	defer s.RUnlock()
+	return s.secrets != nil
 }
--- a/storage/memory/memory.go
+++ b/storage/memory/memory.go
@@ -32,13 +32,15 @@ func (m *memory) Get() (*v1.Secret, error) {
 }

 func (m *memory) Update(secret *v1.Secret) error {
-	if m.storage != nil {
-		if err := m.storage.Update(secret); err != nil {
-			return err
+	if m.secret == nil || m.secret.ResourceVersion == "" || m.secret.ResourceVersion != secret.ResourceVersion {
+		if m.storage != nil {
+			if err := m.storage.Update(secret); err != nil {
+				return err
+			}
 		}
-	}

-	logrus.Infof("Active TLS secret %s (ver=%s) (count %d): %v", secret.Name, secret.ResourceVersion, len(secret.Annotations)-1, secret.Annotations)
-	m.secret = secret
+		logrus.Infof("Active TLS secret %s/%s (ver=%s) (count %d): %v", secret.Namespace, secret.Name, secret.ResourceVersion, len(secret.Annotations)-1, secret.Annotations)
+		m.secret = secret
+	}
 	return nil
 }
Author	SHA1	Message	Date
Liyi Meng	e425269f0e	Use chinese crypto	2022-10-08 22:38:44 +02:00
Caleb Bron	401fafb7e6	Merge pull request #64 from w13915984028/fix63 fix63 use sleep instead of force scheduling	2022-07-28 13:43:07 -07:00
Jian Wang	bad953b9f0	fix63 use sleep instead of force scheduling	2022-07-27 08:59:22 +02:00
Brad Davidson	8ebd77f8a4	Raise default ExpirationDaysCheck to 90 and extend into cert factory Most of our products actually renew at 90 days, so make that the default. Signed-off-by: Brad Davidson <brad.davidson@rancher.com>	2022-07-21 14:08:16 -07:00
Brad Davidson	fdf983a935	Don't merge expired certs over the top of an unexpired cert Fixes an issue where an expired Kubernetes secret would replace the renewed locally-cached cert after cluster startup. Signed-off-by: Brad Davidson <brad.davidson@rancher.com>	2022-07-21 14:08:16 -07:00
Flavio Grossi	7b5997cee9	always use CATTLE_NEW_SIGNED_CERT_EXPIRATION_DAYS when generating a certificate	2022-07-20 12:07:31 -07:00
Lucas Ramage	42d72c2ef2	Merge pull request #56 from rancher/fossa Implement drone-plugin-fossa	2022-07-01 10:58:54 -04:00
Brad Davidson	d2b7e2aaa6	We support IPv6 now, don't skip adding IPv6 address SANs Signed-off-by: Brad Davidson <brad.davidson@rancher.com>	2022-05-20 12:21:30 -07:00
Brad Davidson	a30741bb53	Send complete certificate chain, not just the leaf cert Also, print a warning when signing may change the issuer. Signed-off-by: Brad Davidson <brad.davidson@rancher.com>	2022-05-20 12:21:30 -07:00
Brad Davidson	4df376813d	Improve log messages and warn if no cert is available Signed-off-by: Brad Davidson <brad.davidson@rancher.com>	2022-05-20 12:21:30 -07:00
Brad Davidson	9b92d13bcb	Fix initial secret not being written to Kubernetes Updates to the secret that occurred before the controller was done syncing were not being written to Kubernetes. Subsequent updates to the secret would eventually get it written, but Rancher requires that the cert be written immediately. This was probably an unnecessary optimization anyway, so back it out in favor of just checking to see if the secrets controller is available. Also fixed improper handling of multiple goroutines attempting to create the Kubernetes secret at the same time; this was also handled eventually but caused an unnecessary round of extra writes to the secret. Signed-off-by: Brad Davidson <brad.davidson@rancher.com>	2022-05-20 12:21:30 -07:00
Brad Davidson	b1d65efb6f	Move Kubernetes Secrets storage update to goroutine Fixes issue where apiserver outages can block dynamiclistener from accepting new connections. Signed-off-by: Brad Davidson <brad.davidson@rancher.com>	2022-05-02 18:48:48 -07:00
Lucas Ramage	5e81b14c1f	Implement drone-plugin-fossa	2022-03-31 16:28:22 -04:00
Brian Downs	148d38076d	update config to allow for specifying experiation in days (#53 )	2021-12-21 15:38:04 -07:00
Brad Davidson	43f9c3ae0a	Fix handling of IPv6 addresses and long hostnames Signed-off-by: Brad Davidson <brad.davidson@rancher.com>	2021-11-23 23:38:49 -08:00
Brad Davidson	284cc004e8	Fix listenAndServe certificate expiration by preloading certs Signed-off-by: Brad Davidson <brad.davidson@rancher.com>	2021-11-23 23:38:49 -08:00
Kinara Shah	120a37b97a	Merge pull request #51 from nickgerace/quick-fix Add README	2021-11-19 14:29:09 -08:00
Nick Gerace	bbac29e0fa	Add README	2021-11-19 13:50:48 -05:00
Kinara Shah	962b635269	Merge pull request #50 from nickgerace/quick-fix Fix defaultNewSignedCertExpirationDays const	2021-11-19 10:28:49 -08:00
Nick Gerace	f147aa4166	Fix defaultNewSignedCertExpirationDays const This a quick fix for `2644a6ed16`	2021-11-19 12:31:47 -05:00
Kinara Shah	63157c59ce	Merge pull request #46 from nickgerace/days Allow for default expiration days to be loaded from env	2021-11-19 08:59:57 -08:00
Nick Gerace	2644a6ed16	Allow for default expiration days to be loaded from env	2021-11-18 12:38:35 -05:00
Brian Downs	27f4642299	Add ability to force cert regeneration (#43 ) * add ability to force cert regeneration	2021-11-15 13:50:26 -07:00
Caleb Bron	cd5d71f2fe	Merge pull request #44 from cmurphy/fix-type Fix net.Conn type assertion	2021-11-04 13:09:48 -07:00
Colleen Murphy	fb66484384	Fix net.Conn type assertion Don't assert that all connections are wrapped, as they won't be if the CloseConnOnCertChange setting is false. Only run the assertion within a conditional for wrapped connections, where it is safe. This prevents a panic from happening when CloseConnOnCertChange is not used.	2021-10-29 11:03:02 -07:00
Darren Shepherd	6b37dc1212	Merge pull request #42 from cmurphy/fix-close-conn Skip closing an initializing connection	2021-10-27 08:35:21 -07:00
Colleen Murphy	c7dd355394	Skip closing an initializing connection Without this change, if a cert is updated (e.g. to add CNs) while the listener is in the middle of Accept()ing a new connection, the connection gets dropped, we'll see a message like this in the server logs: http: TLS handshake error from 127.0.0.1:51232: write tcp 127.0.7.1:8443->127.0.0.1:51232: use of closed network connection and the client (like a browser) won't necessarily reconnect. This change modifies the GetCertificate routine in the listener's tls.Config to keep track of the state of the incoming connections and only close connections that have completed GetCertificate and therefore are finished with their TLS handshake, so that only old established connections are closed.	2021-10-25 13:17:24 -07:00
Darren Shepherd	94e22490cf	Merge pull request #41 from weihanglo/nil-defer-storage-tls Merge TLS only if TLS factory is set	2021-08-03 10:23:59 -07:00
Weihang Lo	b45d8a455e	Merge TLS only if TLS factory is set Since `storage.tls` is optional, we should check it existence before calling its methods.	2021-07-12 18:25:01 +08:00
Darren Shepherd	9865ae859c	Don't reset connections on the first load of the certs	2021-06-16 01:00:09 -07:00
Darren Shepherd	db883ae66a	Don't reset connections on the first load of the certs	2021-06-16 00:23:14 -07:00
Darren Shepherd	9dfd7df057	Pass context to http server as BaseContext	2021-06-15 22:42:42 -07:00
Darren Shepherd	ff22834bde	Avoid panic when secret is nil	2021-06-15 22:42:42 -07:00
Sjoerd Simons	dc7452dbb8	Accept IPv6 address as CN names Expand the cnRegexp to also accept ipv6 addresses such as: * ::1 * 2a00:1450:400e:80e:: * 2a00:1450:400e:80e::200e Fixes: #37 Signed-off-by: Sjoerd Simons <sjoerd@collabora.com>	2021-06-14 11:07:13 -07:00
Dan Ramich	86af265dcd	Merge pull request #35 from dramich/panic Update IsStatic to check for nil annotations	2021-04-26 09:21:45 -06:00
Dan Ramich	f373fc1c7c	Update IsStatic to check for nil annotations	2021-04-23 14:56:14 -06:00
Darren Shepherd	e7b1adba70	Update to wrangler v0.8.0 and merge v0.2.x to master	2021-04-12 15:09:30 -07:00
Darren Shepherd	a60200ab9e	Merge tag 'v0.2.3'	2021-04-12 15:00:05 -07:00
Hussein Galal	fc8cf5f3ea	Merge pull request #33 from galal-hussein/fix_load_certs Fixing loading certs to work with etcd only nodes	2021-03-05 22:54:49 +02:00
galal-hussein	3878ff2a1f	Fixing loading certs	2021-03-05 22:39:13 +02:00
Hussein Galal	1b2460c151	Merge pull request #32 from galal-hussein/fix_resversion Add check to update dynamic listener cert in etcd only nodes	2021-03-01 21:58:18 +02:00
galal-hussein	e34610a1ae	Add check to update dynamic listener cert in etcd only nodes	2021-03-01 21:52:45 +02:00
Darren Shepherd	9b1b7d3132	Add filter helper method	2020-11-09 21:52:17 -07:00
Darren Shepherd	85f32491cb	Add dumb hook to set the organization in the client cert	2020-09-10 13:32:14 -07:00
Brad Davidson	7c224dcdfb	Merge pull request #29 from brandond/force_reissue_0.2 Allow forcing cert reissuance (v0.2 backport)	2020-08-11 12:58:42 -07:00
Brad Davidson	53f6b38760	Allow forcing cert reissuance (#28 ) Refreshing the cert should force renewal as opposed to returning early if the SANs aren't changing. This is currently breaking refresh of expired certs as per: https://github.com/rancher/k3s/issues/1621#issuecomment-669464318 Signed-off-by: Brad Davidson <brad.davidson@rancher.com>	2020-08-10 17:12:39 -07:00
Darren Shepherd	479ab335d6	Add LoadOrGenClient to handle client cert generation	2020-08-10 17:12:39 -07:00
Darren Shepherd	2bfb7bd0cb	Fix error masking issue Also don't do an extra lookup of TLS secret after update.	2020-08-10 17:12:39 -07:00