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Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
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outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
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including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
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copyright notice that is included in or attached to the work
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form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
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END OF TERMS AND CONDITIONS

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/*
Copyright 2014 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package cert
import (
"bytes"
"crypto"
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
cryptorand "crypto/rand"
"crypto/rsa"
"crypto/x509"
"crypto/x509/pkix"
"encoding/pem"
"errors"
"fmt"
"io/ioutil"
"math"
"math/big"
"net"
"path"
"strings"
"time"
)
const (
rsaKeySize = 2048
duration365d = time.Hour * 24 * 365
)
// Config contains the basic fields required for creating a certificate
type Config struct {
CommonName string
Organization []string
AltNames AltNames
Usages []x509.ExtKeyUsage
}
// AltNames contains the domain names and IP addresses that will be added
// to the API Server's x509 certificate SubAltNames field. The values will
// be passed directly to the x509.Certificate object.
type AltNames struct {
DNSNames []string
IPs []net.IP
}
// NewPrivateKey creates an RSA private key
func NewPrivateKey() (*rsa.PrivateKey, error) {
return rsa.GenerateKey(cryptorand.Reader, rsaKeySize)
}
// NewSelfSignedCACert creates a CA certificate
func NewSelfSignedCACert(cfg Config, key crypto.Signer) (*x509.Certificate, error) {
now := time.Now()
tmpl := x509.Certificate{
SerialNumber: new(big.Int).SetInt64(0),
Subject: pkix.Name{
CommonName: cfg.CommonName,
Organization: cfg.Organization,
},
NotBefore: now.UTC(),
NotAfter: now.Add(duration365d * 10).UTC(),
KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign,
BasicConstraintsValid: true,
IsCA: true,
}
certDERBytes, err := x509.CreateCertificate(cryptorand.Reader, &tmpl, &tmpl, key.Public(), key)
if err != nil {
return nil, err
}
return x509.ParseCertificate(certDERBytes)
}
// NewSignedCert creates a signed certificate using the given CA certificate and key
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 {
return nil, err
}
if len(cfg.CommonName) == 0 {
return nil, errors.New("must specify a CommonName")
}
if len(cfg.Usages) == 0 {
return nil, errors.New("must specify at least one ExtKeyUsage")
}
certTmpl := x509.Certificate{
Subject: pkix.Name{
CommonName: cfg.CommonName,
Organization: cfg.Organization,
},
DNSNames: cfg.AltNames.DNSNames,
IPAddresses: cfg.AltNames.IPs,
SerialNumber: serial,
NotBefore: caCert.NotBefore,
NotAfter: time.Now().Add(duration365d).UTC(),
KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
ExtKeyUsage: cfg.Usages,
}
certDERBytes, err := x509.CreateCertificate(cryptorand.Reader, &certTmpl, caCert, key.Public(), caKey)
if err != nil {
return nil, err
}
return x509.ParseCertificate(certDERBytes)
}
// MakeEllipticPrivateKeyPEM creates an ECDSA private key
func MakeEllipticPrivateKeyPEM() ([]byte, error) {
privateKey, err := ecdsa.GenerateKey(elliptic.P256(), cryptorand.Reader)
if err != nil {
return nil, err
}
derBytes, err := x509.MarshalECPrivateKey(privateKey)
if err != nil {
return nil, err
}
privateKeyPemBlock := &pem.Block{
Type: ECPrivateKeyBlockType,
Bytes: derBytes,
}
return pem.EncodeToMemory(privateKeyPemBlock), nil
}
// GenerateSelfSignedCertKey creates a self-signed certificate and key for the given host.
// Host may be an IP or a DNS name
// You may also specify additional subject alt names (either ip or dns names) for the certificate.
func GenerateSelfSignedCertKey(host string, alternateIPs []net.IP, alternateDNS []string) ([]byte, []byte, error) {
return GenerateSelfSignedCertKeyWithFixtures(host, alternateIPs, alternateDNS, "")
}
// GenerateSelfSignedCertKeyWithFixtures creates a self-signed certificate and key for the given host.
// Host may be an IP or a DNS name. You may also specify additional subject alt names (either ip or dns names)
// for the certificate.
//
// If fixtureDirectory is non-empty, it is a directory path which can contain pre-generated certs. The format is:
// <host>_<ip>-<ip>_<alternateDNS>-<alternateDNS>.crt
// <host>_<ip>-<ip>_<alternateDNS>-<alternateDNS>.key
// Certs/keys not existing in that directory are created.
func GenerateSelfSignedCertKeyWithFixtures(host string, alternateIPs []net.IP, alternateDNS []string, fixtureDirectory string) ([]byte, []byte, error) {
validFrom := time.Now().Add(-time.Hour) // valid an hour earlier to avoid flakes due to clock skew
maxAge := time.Hour * 24 * 365 // one year self-signed certs
baseName := fmt.Sprintf("%s_%s_%s", host, strings.Join(ipsToStrings(alternateIPs), "-"), strings.Join(alternateDNS, "-"))
certFixturePath := path.Join(fixtureDirectory, baseName+".crt")
keyFixturePath := path.Join(fixtureDirectory, baseName+".key")
if len(fixtureDirectory) > 0 {
cert, err := ioutil.ReadFile(certFixturePath)
if err == nil {
key, err := ioutil.ReadFile(keyFixturePath)
if err == nil {
return cert, key, nil
}
return nil, nil, fmt.Errorf("cert %s can be read, but key %s cannot: %v", certFixturePath, keyFixturePath, err)
}
maxAge = 100 * time.Hour * 24 * 365 // 100 years fixtures
}
caKey, err := rsa.GenerateKey(cryptorand.Reader, 2048)
if err != nil {
return nil, nil, err
}
caTemplate := x509.Certificate{
SerialNumber: big.NewInt(1),
Subject: pkix.Name{
CommonName: fmt.Sprintf("%s-ca@%d", host, time.Now().Unix()),
},
NotBefore: validFrom,
NotAfter: validFrom.Add(maxAge),
KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign,
BasicConstraintsValid: true,
IsCA: true,
}
caDERBytes, err := x509.CreateCertificate(cryptorand.Reader, &caTemplate, &caTemplate, &caKey.PublicKey, caKey)
if err != nil {
return nil, nil, err
}
caCertificate, err := x509.ParseCertificate(caDERBytes)
if err != nil {
return nil, nil, err
}
priv, err := rsa.GenerateKey(cryptorand.Reader, 2048)
if err != nil {
return nil, nil, err
}
template := x509.Certificate{
SerialNumber: big.NewInt(2),
Subject: pkix.Name{
CommonName: fmt.Sprintf("%s@%d", host, time.Now().Unix()),
},
NotBefore: validFrom,
NotAfter: validFrom.Add(maxAge),
KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
BasicConstraintsValid: true,
}
if ip := net.ParseIP(host); ip != nil {
template.IPAddresses = append(template.IPAddresses, ip)
} else {
template.DNSNames = append(template.DNSNames, host)
}
template.IPAddresses = append(template.IPAddresses, alternateIPs...)
template.DNSNames = append(template.DNSNames, alternateDNS...)
derBytes, err := x509.CreateCertificate(cryptorand.Reader, &template, caCertificate, &priv.PublicKey, caKey)
if err != nil {
return nil, nil, err
}
// Generate cert, followed by ca
certBuffer := bytes.Buffer{}
if err := pem.Encode(&certBuffer, &pem.Block{Type: CertificateBlockType, Bytes: derBytes}); err != nil {
return nil, nil, err
}
if err := pem.Encode(&certBuffer, &pem.Block{Type: CertificateBlockType, Bytes: caDERBytes}); err != nil {
return nil, nil, err
}
// Generate key
keyBuffer := bytes.Buffer{}
if err := pem.Encode(&keyBuffer, &pem.Block{Type: RSAPrivateKeyBlockType, Bytes: x509.MarshalPKCS1PrivateKey(priv)}); err != nil {
return nil, nil, err
}
if len(fixtureDirectory) > 0 {
if err := ioutil.WriteFile(certFixturePath, certBuffer.Bytes(), 0644); err != nil {
return nil, nil, fmt.Errorf("failed to write cert fixture to %s: %v", certFixturePath, err)
}
if err := ioutil.WriteFile(keyFixturePath, keyBuffer.Bytes(), 0644); err != nil {
return nil, nil, fmt.Errorf("failed to write key fixture to %s: %v", certFixturePath, err)
}
}
return certBuffer.Bytes(), keyBuffer.Bytes(), nil
}
func ipsToStrings(ips []net.IP) []string {
ss := make([]string, 0, len(ips))
for _, ip := range ips {
ss = append(ss, ip.String())
}
return ss
}

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/*
Copyright 2016 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package cert
import (
cryptorand "crypto/rand"
"crypto/rsa"
"crypto/x509"
"crypto/x509/pkix"
"encoding/pem"
"net"
)
// MakeCSR generates a PEM-encoded CSR using the supplied private key, subject, and SANs.
// All key types that are implemented via crypto.Signer are supported (This includes *rsa.PrivateKey and *ecdsa.PrivateKey.)
func MakeCSR(privateKey interface{}, subject *pkix.Name, dnsSANs []string, ipSANs []net.IP) (csr []byte, err error) {
template := &x509.CertificateRequest{
Subject: *subject,
DNSNames: dnsSANs,
IPAddresses: ipSANs,
}
return MakeCSRFromTemplate(privateKey, template)
}
// MakeCSRFromTemplate generates a PEM-encoded CSR using the supplied private
// key and certificate request as a template. All key types that are
// implemented via crypto.Signer are supported (This includes *rsa.PrivateKey
// and *ecdsa.PrivateKey.)
func MakeCSRFromTemplate(privateKey interface{}, template *x509.CertificateRequest) ([]byte, error) {
t := *template
t.SignatureAlgorithm = sigType(privateKey)
csrDER, err := x509.CreateCertificateRequest(cryptorand.Reader, &t, privateKey)
if err != nil {
return nil, err
}
csrPemBlock := &pem.Block{
Type: CertificateRequestBlockType,
Bytes: csrDER,
}
return pem.EncodeToMemory(csrPemBlock), nil
}
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 {
case keySize >= 4096:
return x509.SHA512WithRSA
case keySize >= 3072:
return x509.SHA384WithRSA
default:
return x509.SHA256WithRSA
}
}
return x509.UnknownSignatureAlgorithm
}

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/*
Copyright 2014 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package cert
import (
"crypto"
"crypto/ecdsa"
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"fmt"
"io/ioutil"
"os"
"path/filepath"
)
// CanReadCertAndKey returns true if the certificate and key files already exists,
// otherwise returns false. If lost one of cert and key, returns error.
func CanReadCertAndKey(certPath, keyPath string) (bool, error) {
certReadable := canReadFile(certPath)
keyReadable := canReadFile(keyPath)
if certReadable == false && keyReadable == false {
return false, nil
}
if certReadable == false {
return false, fmt.Errorf("error reading %s, certificate and key must be supplied as a pair", certPath)
}
if keyReadable == false {
return false, fmt.Errorf("error reading %s, certificate and key must be supplied as a pair", keyPath)
}
return true, nil
}
// If the file represented by path exists and
// readable, returns true otherwise returns false.
func canReadFile(path string) bool {
f, err := os.Open(path)
if err != nil {
return false
}
defer f.Close()
return true
}
// WriteCert writes the pem-encoded certificate data to certPath.
// The certificate file will be created with file mode 0644.
// If the certificate file already exists, it will be overwritten.
// The parent directory of the certPath will be created as needed with file mode 0755.
func WriteCert(certPath string, data []byte) error {
if err := os.MkdirAll(filepath.Dir(certPath), os.FileMode(0755)); err != nil {
return err
}
return ioutil.WriteFile(certPath, data, os.FileMode(0644))
}
// WriteKey writes the pem-encoded key data to keyPath.
// The key file will be created with file mode 0600.
// If the key file already exists, it will be overwritten.
// The parent directory of the keyPath will be created as needed with file mode 0755.
func WriteKey(keyPath string, data []byte) error {
if err := os.MkdirAll(filepath.Dir(keyPath), os.FileMode(0755)); err != nil {
return err
}
return ioutil.WriteFile(keyPath, data, os.FileMode(0600))
}
// LoadOrGenerateKeyFile looks for a key in the file at the given path. If it
// can't find one, it will generate a new key and store it there.
func LoadOrGenerateKeyFile(keyPath string) (data []byte, wasGenerated bool, err error) {
loadedData, err := ioutil.ReadFile(keyPath)
// Call verifyKeyData to ensure the file wasn't empty/corrupt.
if err == nil && verifyKeyData(loadedData) {
return loadedData, false, err
}
if !os.IsNotExist(err) {
return nil, false, fmt.Errorf("error loading key from %s: %v", keyPath, err)
}
generatedData, err := MakeEllipticPrivateKeyPEM()
if err != nil {
return nil, false, fmt.Errorf("error generating key: %v", err)
}
if err := WriteKey(keyPath, generatedData); err != nil {
return nil, false, fmt.Errorf("error writing key to %s: %v", keyPath, err)
}
return generatedData, true, nil
}
// MarshalPrivateKeyToPEM converts a known private key type of RSA or ECDSA to
// a PEM encoded block or returns an error.
func MarshalPrivateKeyToPEM(privateKey crypto.PrivateKey) ([]byte, error) {
switch t := privateKey.(type) {
case *ecdsa.PrivateKey:
derBytes, err := x509.MarshalECPrivateKey(t)
if err != nil {
return nil, err
}
privateKeyPemBlock := &pem.Block{
Type: ECPrivateKeyBlockType,
Bytes: derBytes,
}
return pem.EncodeToMemory(privateKeyPemBlock), nil
case *rsa.PrivateKey:
return EncodePrivateKeyPEM(t), nil
default:
return nil, fmt.Errorf("private key is not a recognized type: %T", privateKey)
}
}
// NewPool returns an x509.CertPool containing the certificates in the given PEM-encoded file.
// Returns an error if the file could not be read, a certificate could not be parsed, or if the file does not contain any certificates
func NewPool(filename string) (*x509.CertPool, error) {
certs, err := CertsFromFile(filename)
if err != nil {
return nil, err
}
pool := x509.NewCertPool()
for _, cert := range certs {
pool.AddCert(cert)
}
return pool, nil
}
// CertsFromFile returns the x509.Certificates contained in the given PEM-encoded file.
// Returns an error if the file could not be read, a certificate could not be parsed, or if the file does not contain any certificates
func CertsFromFile(file string) ([]*x509.Certificate, error) {
pemBlock, err := ioutil.ReadFile(file)
if err != nil {
return nil, err
}
certs, err := ParseCertsPEM(pemBlock)
if err != nil {
return nil, fmt.Errorf("error reading %s: %s", file, err)
}
return certs, nil
}
// PrivateKeyFromFile returns the private key in rsa.PrivateKey or ecdsa.PrivateKey format from a given PEM-encoded file.
// Returns an error if the file could not be read or if the private key could not be parsed.
func PrivateKeyFromFile(file string) (interface{}, error) {
data, err := ioutil.ReadFile(file)
if err != nil {
return nil, err
}
key, err := ParsePrivateKeyPEM(data)
if err != nil {
return nil, fmt.Errorf("error reading private key file %s: %v", file, err)
}
return key, nil
}
// PublicKeysFromFile returns the public keys in rsa.PublicKey or ecdsa.PublicKey format from a given PEM-encoded file.
// Reads public keys from both public and private key files.
func PublicKeysFromFile(file string) ([]interface{}, error) {
data, err := ioutil.ReadFile(file)
if err != nil {
return nil, err
}
keys, err := ParsePublicKeysPEM(data)
if err != nil {
return nil, fmt.Errorf("error reading public key file %s: %v", file, err)
}
return keys, nil
}
// verifyKeyData returns true if the provided data appears to be a valid private key.
func verifyKeyData(data []byte) bool {
if len(data) == 0 {
return false
}
_, err := ParsePrivateKeyPEM(data)
return err == nil
}

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/*
Copyright 2014 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package cert
import (
"crypto/ecdsa"
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"errors"
"fmt"
)
const (
// ECPrivateKeyBlockType is a possible value for pem.Block.Type.
ECPrivateKeyBlockType = "EC PRIVATE KEY"
// RSAPrivateKeyBlockType is a possible value for pem.Block.Type.
RSAPrivateKeyBlockType = "RSA PRIVATE KEY"
// PrivateKeyBlockType is a possible value for pem.Block.Type.
PrivateKeyBlockType = "PRIVATE KEY"
// PublicKeyBlockType is a possible value for pem.Block.Type.
PublicKeyBlockType = "PUBLIC KEY"
// CertificateBlockType is a possible value for pem.Block.Type.
CertificateBlockType = "CERTIFICATE"
// CertificateRequestBlockType is a possible value for pem.Block.Type.
CertificateRequestBlockType = "CERTIFICATE REQUEST"
)
// EncodePublicKeyPEM returns PEM-encoded public data
func EncodePublicKeyPEM(key *rsa.PublicKey) ([]byte, error) {
der, err := x509.MarshalPKIXPublicKey(key)
if err != nil {
return []byte{}, err
}
block := pem.Block{
Type: PublicKeyBlockType,
Bytes: der,
}
return pem.EncodeToMemory(&block), nil
}
// EncodePrivateKeyPEM returns PEM-encoded private key data
func EncodePrivateKeyPEM(key *rsa.PrivateKey) []byte {
block := pem.Block{
Type: RSAPrivateKeyBlockType,
Bytes: x509.MarshalPKCS1PrivateKey(key),
}
return pem.EncodeToMemory(&block)
}
// EncodeCertPEM returns PEM-endcoded certificate data
func EncodeCertPEM(cert *x509.Certificate) []byte {
block := pem.Block{
Type: CertificateBlockType,
Bytes: cert.Raw,
}
return pem.EncodeToMemory(&block)
}
// ParsePrivateKeyPEM returns a private key parsed from a PEM block in the supplied data.
// Recognizes PEM blocks for "EC PRIVATE KEY", "RSA PRIVATE KEY", or "PRIVATE KEY"
func ParsePrivateKeyPEM(keyData []byte) (interface{}, error) {
var privateKeyPemBlock *pem.Block
for {
privateKeyPemBlock, keyData = pem.Decode(keyData)
if privateKeyPemBlock == nil {
break
}
switch privateKeyPemBlock.Type {
case ECPrivateKeyBlockType:
// ECDSA Private Key in ASN.1 format
if key, err := x509.ParseECPrivateKey(privateKeyPemBlock.Bytes); err == nil {
return key, nil
}
case RSAPrivateKeyBlockType:
// RSA Private Key in PKCS#1 format
if key, err := x509.ParsePKCS1PrivateKey(privateKeyPemBlock.Bytes); err == nil {
return key, nil
}
case PrivateKeyBlockType:
// RSA or ECDSA Private Key in unencrypted PKCS#8 format
if key, err := x509.ParsePKCS8PrivateKey(privateKeyPemBlock.Bytes); err == nil {
return key, nil
}
}
// tolerate non-key PEM blocks for compatibility with things like "EC PARAMETERS" blocks
// originally, only the first PEM block was parsed and expected to be a key block
}
// we read all the PEM blocks and didn't recognize one
return nil, fmt.Errorf("data does not contain a valid RSA or ECDSA private key")
}
// ParsePublicKeysPEM is a helper function for reading an array of rsa.PublicKey or ecdsa.PublicKey from a PEM-encoded byte array.
// Reads public keys from both public and private key files.
func ParsePublicKeysPEM(keyData []byte) ([]interface{}, error) {
var block *pem.Block
keys := []interface{}{}
for {
// read the next block
block, keyData = pem.Decode(keyData)
if block == nil {
break
}
// test block against parsing functions
if privateKey, err := parseRSAPrivateKey(block.Bytes); err == nil {
keys = append(keys, &privateKey.PublicKey)
continue
}
if publicKey, err := parseRSAPublicKey(block.Bytes); err == nil {
keys = append(keys, publicKey)
continue
}
if privateKey, err := parseECPrivateKey(block.Bytes); err == nil {
keys = append(keys, &privateKey.PublicKey)
continue
}
if publicKey, err := parseECPublicKey(block.Bytes); err == nil {
keys = append(keys, publicKey)
continue
}
// tolerate non-key PEM blocks for backwards compatibility
// originally, only the first PEM block was parsed and expected to be a key block
}
if len(keys) == 0 {
return nil, fmt.Errorf("data does not contain any valid RSA or ECDSA public keys")
}
return keys, nil
}
// ParseCertsPEM returns the x509.Certificates contained in the given PEM-encoded byte array
// Returns an error if a certificate could not be parsed, or if the data does not contain any certificates
func ParseCertsPEM(pemCerts []byte) ([]*x509.Certificate, error) {
ok := false
certs := []*x509.Certificate{}
for len(pemCerts) > 0 {
var block *pem.Block
block, pemCerts = pem.Decode(pemCerts)
if block == nil {
break
}
// Only use PEM "CERTIFICATE" blocks without extra headers
if block.Type != CertificateBlockType || len(block.Headers) != 0 {
continue
}
cert, err := x509.ParseCertificate(block.Bytes)
if err != nil {
return certs, err
}
certs = append(certs, cert)
ok = true
}
if !ok {
return certs, errors.New("data does not contain any valid RSA or ECDSA certificates")
}
return certs, nil
}
// parseRSAPublicKey parses a single RSA public key from the provided data
func parseRSAPublicKey(data []byte) (*rsa.PublicKey, error) {
var err error
// Parse the key
var parsedKey interface{}
if parsedKey, err = x509.ParsePKIXPublicKey(data); err != nil {
if cert, err := x509.ParseCertificate(data); err == nil {
parsedKey = cert.PublicKey
} else {
return nil, err
}
}
// Test if parsed key is an RSA Public Key
var pubKey *rsa.PublicKey
var ok bool
if pubKey, ok = parsedKey.(*rsa.PublicKey); !ok {
return nil, fmt.Errorf("data doesn't contain valid RSA Public Key")
}
return pubKey, nil
}
// parseRSAPrivateKey parses a single RSA private key from the provided data
func parseRSAPrivateKey(data []byte) (*rsa.PrivateKey, error) {
var err error
// Parse the key
var parsedKey interface{}
if parsedKey, err = x509.ParsePKCS1PrivateKey(data); err != nil {
if parsedKey, err = x509.ParsePKCS8PrivateKey(data); err != nil {
return nil, err
}
}
// Test if parsed key is an RSA Private Key
var privKey *rsa.PrivateKey
var ok bool
if privKey, ok = parsedKey.(*rsa.PrivateKey); !ok {
return nil, fmt.Errorf("data doesn't contain valid RSA Private Key")
}
return privKey, nil
}
// parseECPublicKey parses a single ECDSA public key from the provided data
func parseECPublicKey(data []byte) (*ecdsa.PublicKey, error) {
var err error
// Parse the key
var parsedKey interface{}
if parsedKey, err = x509.ParsePKIXPublicKey(data); err != nil {
if cert, err := x509.ParseCertificate(data); err == nil {
parsedKey = cert.PublicKey
} else {
return nil, err
}
}
// Test if parsed key is an ECDSA Public Key
var pubKey *ecdsa.PublicKey
var ok bool
if pubKey, ok = parsedKey.(*ecdsa.PublicKey); !ok {
return nil, fmt.Errorf("data doesn't contain valid ECDSA Public Key")
}
return pubKey, nil
}
// parseECPrivateKey parses a single ECDSA private key from the provided data
func parseECPrivateKey(data []byte) (*ecdsa.PrivateKey, error) {
var err error
// Parse the key
var parsedKey interface{}
if parsedKey, err = x509.ParseECPrivateKey(data); err != nil {
return nil, err
}
// Test if parsed key is an ECDSA Private Key
var privKey *ecdsa.PrivateKey
var ok bool
if privKey, ok = parsedKey.(*ecdsa.PrivateKey); !ok {
return nil, fmt.Errorf("data doesn't contain valid ECDSA Private Key")
}
return privKey, nil
}

14
go.mod Normal file
View File

@ -0,0 +1,14 @@
module github.com/rancher/dynamiclistener
go 1.12
require (
github.com/hashicorp/golang-lru v0.5.1
github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
github.com/sirupsen/logrus v1.4.1
github.com/stretchr/testify v1.3.0 // indirect
golang.org/x/crypto v0.0.0-20190506204251-e1dfcc566284
golang.org/x/net v0.0.0-20190503192946-f4e77d36d62c // indirect
golang.org/x/sys v0.0.0-20190509141414-a5b02f93d862 // indirect
golang.org/x/text v0.3.2 // indirect
)

38
go.sum Normal file
View File

@ -0,0 +1,38 @@
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/hashicorp/golang-lru v0.5.1 h1:0hERBMJE1eitiLkihrMvRVBYAkpHzc/J3QdDN+dAcgU=
github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
github.com/konsorten/go-windows-terminal-sequences v1.0.1 h1:mweAR1A6xJ3oS2pRaGiHgQ4OO8tzTaLawm8vnODuwDk=
github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
github.com/konsorten/go-windows-terminal-sequences v1.0.2 h1:DB17ag19krx9CFsz4o3enTrPXyIXCl+2iCXH/aMAp9s=
github.com/konsorten/go-windows-terminal-sequences v1.0.2/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/sirupsen/logrus v1.4.1 h1:GL2rEmy6nsikmW0r8opw9JIRScdMF5hA8cOYLH7In1k=
github.com/sirupsen/logrus v1.4.1/go.mod h1:ni0Sbl8bgC9z8RoU9G6nDWqqs/fq4eDPysMBDgk/93Q=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20190506204251-e1dfcc566284 h1:rlLehGeYg6jfoyz/eDqDU1iRXLKfR42nnNh57ytKEWo=
golang.org/x/crypto v0.0.0-20190506204251-e1dfcc566284/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3 h1:0GoQqolDA55aaLxZyTzK/Y2ePZzZTUrRacwib7cNsYQ=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190503192946-f4e77d36d62c h1:uOCk1iQW6Vc18bnC13MfzScl+wdKBmM9Y9kU7Z83/lw=
golang.org/x/net v0.0.0-20190503192946-f4e77d36d62c/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33 h1:I6FyU15t786LL7oL/hn43zqTuEGr4PN7F4XJ1p4E3Y8=
golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190412213103-97732733099d h1:+R4KGOnez64A81RvjARKc4UT5/tI9ujCIVX+P5KiHuI=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190509141414-a5b02f93d862 h1:rM0ROo5vb9AdYJi1110yjWGMej9ITfKddS89P3Fkhug=
golang.org/x/sys v0.0.0-20190509141414-a5b02f93d862/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=

55
read.go Normal file
View File

@ -0,0 +1,55 @@
package dynamiclistener
import (
"fmt"
"io/ioutil"
"path/filepath"
)
func ReadTLSConfig(userConfig *UserConfig) error {
var err error
path := userConfig.CertPath
userConfig.CACerts, err = readPEM(filepath.Join(path, "cacerts.pem"))
if err != nil {
return err
}
userConfig.Key, err = readPEM(filepath.Join(path, "key.pem"))
if err != nil {
return err
}
userConfig.Cert, err = readPEM(filepath.Join(path, "cert.pem"))
if err != nil {
return err
}
userConfig.Mode = "https"
if len(userConfig.Domains) > 0 {
userConfig.Mode = "acme"
}
valid := false
if userConfig.Key != "" && userConfig.Cert != "" {
valid = true
} else if userConfig.Key == "" && userConfig.Cert == "" {
valid = true
}
if !valid {
return fmt.Errorf("invalid SSL configuration found, please set cert/key, cert/key/cacerts, cacerts only, or none")
}
return nil
}
func readPEM(path string) (string, error) {
content, err := ioutil.ReadFile(path)
if err != nil {
return "", nil
}
return string(content), nil
}

645
server.go Normal file
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@ -0,0 +1,645 @@
package dynamiclistener
import (
"bytes"
"context"
"crypto/md5"
"crypto/rsa"
"crypto/tls"
"crypto/x509"
"encoding/base64"
"encoding/hex"
"encoding/pem"
"errors"
"fmt"
"log"
"net"
"net/http"
"sort"
"strconv"
"strings"
"sync"
"time"
lru "github.com/hashicorp/golang-lru"
cert "github.com/rancher/dynamiclistener/cert"
"github.com/sirupsen/logrus"
"golang.org/x/crypto/acme/autocert"
)
const (
httpsMode = "https"
acmeMode = "acme"
)
type server struct {
sync.Mutex
userConfig UserConfig
listenConfigStorage ListenerConfigStorage
certs map[string]*tls.Certificate
ips *lru.Cache
listeners []net.Listener
servers []*http.Server
// dynamic config change on refresh
activeCert *tls.Certificate
activeCA *x509.Certificate
activeCAKey *rsa.PrivateKey
activeCAKeyString string
domains map[string]bool
}
func NewServer(listenConfigStorage ListenerConfigStorage, config UserConfig) (ServerInterface, error) {
s := &server{
userConfig: config,
listenConfigStorage: listenConfigStorage,
certs: map[string]*tls.Certificate{},
}
s.ips, _ = lru.New(20)
if err := s.userConfigure(); err != nil {
return nil, err
}
lc, err := listenConfigStorage.Get()
if err != nil {
return nil, err
}
return s, s.Update(lc)
}
func (s *server) CACert() (string, error) {
if s.userConfig.NoCACerts {
return "", nil
}
if s.userConfig.CACerts != "" {
return s.userConfig.CACerts, nil
}
status, err := s.listenConfigStorage.Get()
if err != nil {
return "", err
}
if status.CACert == "" {
return "", fmt.Errorf("ca cert not found")
}
return status.CACert, nil
}
func (s *server) save() {
if s.activeCert != nil {
return
}
s.Lock()
defer s.Unlock()
changed := false
cfg, err := s.listenConfigStorage.Get()
if err != nil {
return
}
if cfg.GeneratedCerts == nil {
cfg.GeneratedCerts = map[string]string{}
}
if cfg.KnownIPs == nil {
cfg.KnownIPs = map[string]bool{}
}
for key, cert := range s.certs {
certStr := certToString(cert)
if cfg.GeneratedCerts[key] != certStr {
cfg.GeneratedCerts[key] = certStr
changed = true
}
}
for _, obj := range s.ips.Keys() {
ip, _ := obj.(string)
if !cfg.KnownIPs[ip] {
cfg.KnownIPs[ip] = true
changed = true
}
}
if cfg.CAKey == "" && s.activeCAKey != nil && s.activeCA != nil {
caCertBuffer := bytes.Buffer{}
if err := pem.Encode(&caCertBuffer, &pem.Block{
Type: cert.CertificateBlockType,
Bytes: s.activeCA.Raw,
}); err != nil {
return
}
caKeyBuffer := bytes.Buffer{}
if err := pem.Encode(&caKeyBuffer, &pem.Block{
Type: cert.RSAPrivateKeyBlockType,
Bytes: x509.MarshalPKCS1PrivateKey(s.activeCAKey),
}); err != nil {
return
}
cfg.CACert = string(caCertBuffer.Bytes())
cfg.CAKey = string(caKeyBuffer.Bytes())
s.activeCAKeyString = cfg.CAKey
changed = true
}
if changed {
s.listenConfigStorage.Set(cfg)
}
}
func (s *server) userConfigure() error {
if s.userConfig.HTTPSPort == 0 {
s.userConfig.HTTPSPort = 8443
}
if s.userConfig.Mode == "" {
if len(s.userConfig.Domains) > 0 {
s.userConfig.Mode = acmeMode
} else {
s.userConfig.Mode = httpsMode
}
}
s.domains = map[string]bool{}
for _, d := range s.userConfig.Domains {
s.domains[d] = true
}
if s.userConfig.Key != "" && s.userConfig.Cert != "" {
cert, err := tls.X509KeyPair([]byte(s.userConfig.Cert), []byte(s.userConfig.Key))
if err != nil {
return err
}
s.activeCert = &cert
s.userConfig.Mode = httpsMode
return s.reload()
}
for _, ip := range s.userConfig.KnownIPs {
netIP := net.ParseIP(ip)
if netIP != nil {
s.ips.Add(ip, netIP)
}
}
bindAddress := net.ParseIP(s.userConfig.BindAddress)
if bindAddress != nil {
s.ips.Add(s.userConfig.BindAddress, bindAddress)
}
return nil
}
func genCA() (*x509.Certificate, *rsa.PrivateKey, error) {
caKey, err := cert.NewPrivateKey()
if err != nil {
return nil, nil, err
}
caCert, err := cert.NewSelfSignedCACert(cert.Config{
CommonName: "k3s-ca",
Organization: []string{"k3s-org"},
}, caKey)
if err != nil {
return nil, nil, err
}
return caCert, caKey, nil
}
func (s *server) Update(status *ListenerStatus) error {
s.Lock()
defer s.getCertificate(&tls.ClientHelloInfo{ServerName: "localhost"})
if status.CACert != "" && status.CAKey != "" && s.activeCAKeyString != status.CAKey {
cert, err := tls.X509KeyPair([]byte(status.CACert), []byte(status.CAKey))
if err != nil {
s.Unlock()
return err
}
s.activeCAKey = cert.PrivateKey.(*rsa.PrivateKey)
s.activeCAKeyString = status.CAKey
x509Cert, err := x509.ParseCertificate(cert.Certificate[0])
if err != nil {
s.Unlock()
return err
}
s.activeCA = x509Cert
s.certs = map[string]*tls.Certificate{}
}
for ipStr := range status.KnownIPs {
ip := net.ParseIP(ipStr)
if len(ip) > 0 {
s.ips.ContainsOrAdd(ipStr, ip)
}
}
for key, certString := range status.GeneratedCerts {
cert := stringToCert(certString)
if cert != nil {
s.certs[key] = cert
}
}
s.Unlock()
return s.reload()
}
func (s *server) hostPolicy(ctx context.Context, host string) error {
s.Lock()
defer s.Unlock()
if s.domains[host] {
return nil
}
return errors.New("acme/autocert: host not configured")
}
func (s *server) prompt(tos string) bool {
return true
}
func (s *server) shutdown() error {
for _, listener := range s.listeners {
if err := listener.Close(); err != nil {
return err
}
}
s.listeners = nil
for _, server := range s.servers {
go server.Shutdown(context.Background())
}
s.servers = nil
return nil
}
func (s *server) reload() error {
if len(s.listeners) > 0 {
return nil
}
if err := s.shutdown(); err != nil {
return err
}
switch s.userConfig.Mode {
case acmeMode:
if err := s.serveACME(); err != nil {
return err
}
case httpsMode:
if err := s.serveHTTPS(); err != nil {
return err
}
}
return nil
}
func (s *server) ipMapKey() string {
len := s.ips.Len()
keys := s.ips.Keys()
if len == 0 {
return fmt.Sprintf("local/%d", len)
} else if len == 1 {
return fmt.Sprintf("local/%s", keys[0])
}
sort.Slice(keys, func(i, j int) bool {
l, _ := keys[i].(string)
r, _ := keys[j].(string)
return l < r
})
if len < 6 {
return fmt.Sprintf("local/%v", keys)
}
digest := md5.New()
for _, k := range keys {
s, _ := k.(string)
digest.Write([]byte(s))
}
return fmt.Sprintf("local/%v", hex.EncodeToString(digest.Sum(nil)))
}
func (s *server) getCertificate(hello *tls.ClientHelloInfo) (*tls.Certificate, error) {
s.Lock()
if s.activeCert != nil {
s.Unlock()
return s.activeCert, nil
}
changed := false
defer func() {
if changed {
s.save()
}
}()
defer s.Unlock()
mapKey := hello.ServerName
cn := hello.ServerName
dnsNames := []string{cn}
ipBased := false
var ips []net.IP
if cn == "" {
mapKey = s.ipMapKey()
ipBased = true
}
serverNameCert, ok := s.certs[mapKey]
if ok {
return serverNameCert, nil
}
if ipBased {
cn = "cattle"
for _, ipStr := range s.ips.Keys() {
ip := net.ParseIP(ipStr.(string))
if len(ip) > 0 {
ips = append(ips, ip)
}
}
}
changed = true
if s.activeCA == nil {
ca, key, err := genCA()
if err != nil {
return nil, err
}
s.activeCA = ca
s.activeCAKey = key
}
cfg := cert.Config{
CommonName: cn,
Organization: s.activeCA.Subject.Organization,
Usages: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
AltNames: cert.AltNames{
DNSNames: dnsNames,
IPs: ips,
},
}
key, err := cert.NewPrivateKey()
if err != nil {
return nil, err
}
cert, err := cert.NewSignedCert(cfg, key, s.activeCA, s.activeCAKey)
if err != nil {
return nil, err
}
tlsCert := &tls.Certificate{
Certificate: [][]byte{
cert.Raw,
},
PrivateKey: key,
}
s.certs[mapKey] = tlsCert
return tlsCert, nil
}
func (s *server) cacheIPHandler(handler http.Handler) http.Handler {
return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
h, _, err := net.SplitHostPort(req.Host)
if err != nil {
h = req.Host
}
ip := net.ParseIP(h)
if len(ip) > 0 {
if ok, _ := s.ips.ContainsOrAdd(h, ip); ok {
go s.save()
}
}
handler.ServeHTTP(resp, req)
})
}
func (s *server) serveHTTPS() error {
conf := &tls.Config{
GetCertificate: s.getCertificate,
PreferServerCipherSuites: true,
}
listener, err := s.newListener(s.userConfig.BindAddress, s.userConfig.HTTPSPort, conf)
if err != nil {
return err
}
logger := logrus.StandardLogger()
server := &http.Server{
Handler: s.cacheIPHandler(s.Handler()),
ErrorLog: log.New(logger.WriterLevel(logrus.DebugLevel), "", log.LstdFlags),
}
s.servers = append(s.servers, server)
s.startServer(listener, server)
if s.userConfig.HTTPPort > 0 {
httpListener, err := s.newListener(s.userConfig.BindAddress, s.userConfig.HTTPPort, nil)
if err != nil {
return err
}
httpServer := &http.Server{
Handler: s.cacheIPHandler(httpRedirect(s.Handler())),
ErrorLog: log.New(logger.WriterLevel(logrus.DebugLevel), "", log.LstdFlags),
}
s.servers = append(s.servers, httpServer)
s.startServer(httpListener, httpServer)
}
return nil
}
// Approach taken from letsencrypt, except manglePort is specific to us
func httpRedirect(next http.Handler) http.Handler {
return http.HandlerFunc(
func(rw http.ResponseWriter, r *http.Request) {
if r.Header.Get("x-Forwarded-Proto") == "https" ||
strings.HasPrefix(r.URL.Path, "/ping") ||
strings.HasPrefix(r.URL.Path, "/health") {
next.ServeHTTP(rw, r)
return
}
if r.Method != "GET" && r.Method != "HEAD" {
http.Error(rw, "Use HTTPS", http.StatusBadRequest)
return
}
target := "https://" + manglePort(r.Host) + r.URL.RequestURI()
http.Redirect(rw, r, target, http.StatusFound)
})
}
func manglePort(hostport string) string {
host, port, err := net.SplitHostPort(hostport)
if err != nil {
return hostport
}
portInt, err := strconv.Atoi(port)
if err != nil {
return hostport
}
portInt = ((portInt / 1000) * 1000) + 443
return net.JoinHostPort(host, strconv.Itoa(portInt))
}
func (s *server) startServer(listener net.Listener, server *http.Server) {
go func() {
if err := server.Serve(listener); err != nil {
logrus.Errorf("server on %v returned err: %v", listener.Addr(), err)
}
}()
}
func (s *server) Handler() http.Handler {
return s.userConfig.Handler
}
func (s *server) newListener(ip string, port int, config *tls.Config) (net.Listener, error) {
addr := fmt.Sprintf("%s:%d", ip, port)
l, err := net.Listen("tcp", addr)
if err != nil {
return nil, err
}
l = tcpKeepAliveListener{l.(*net.TCPListener)}
if config != nil {
l = tls.NewListener(l, config)
}
s.listeners = append(s.listeners, l)
logrus.Info("Listening on ", addr)
return l, nil
}
func (s *server) serveACME() error {
manager := autocert.Manager{
Cache: autocert.DirCache("certs-cache"),
Prompt: s.prompt,
HostPolicy: s.hostPolicy,
}
conf := &tls.Config{
GetCertificate: func(hello *tls.ClientHelloInfo) (*tls.Certificate, error) {
if hello.ServerName == "localhost" || hello.ServerName == "" {
newHello := *hello
newHello.ServerName = s.userConfig.Domains[0]
return manager.GetCertificate(&newHello)
}
return manager.GetCertificate(hello)
},
NextProtos: []string{"h2", "http/1.1"},
}
if s.userConfig.HTTPPort > 0 {
httpListener, err := s.newListener(s.userConfig.BindAddress, s.userConfig.HTTPPort, nil)
if err != nil {
return err
}
httpServer := &http.Server{
Handler: manager.HTTPHandler(nil),
ErrorLog: log.New(logrus.StandardLogger().Writer(), "", log.LstdFlags),
}
s.servers = append(s.servers, httpServer)
go func() {
if err := httpServer.Serve(httpListener); err != nil {
logrus.Errorf("http server returned err: %v", err)
}
}()
}
httpsListener, err := s.newListener(s.userConfig.BindAddress, s.userConfig.HTTPSPort, conf)
if err != nil {
return err
}
httpsServer := &http.Server{
Handler: s.Handler(),
ErrorLog: log.New(logrus.StandardLogger().Writer(), "", log.LstdFlags),
}
s.servers = append(s.servers, httpsServer)
go func() {
if err := httpsServer.Serve(httpsListener); err != nil {
logrus.Errorf("https server returned err: %v", err)
}
}()
return nil
}
func stringToCert(certString string) *tls.Certificate {
parts := strings.Split(certString, "#")
if len(parts) != 2 {
return nil
}
cert, key := parts[0], parts[1]
keyBytes, err := base64.StdEncoding.DecodeString(key)
if err != nil {
return nil
}
rsaKey, err := x509.ParsePKCS1PrivateKey(keyBytes)
if err != nil {
return nil
}
certBytes, err := base64.StdEncoding.DecodeString(cert)
if err != nil {
return nil
}
return &tls.Certificate{
Certificate: [][]byte{certBytes},
PrivateKey: rsaKey,
}
}
func certToString(cert *tls.Certificate) string {
certString := base64.StdEncoding.EncodeToString(cert.Certificate[0])
keyString := base64.StdEncoding.EncodeToString(x509.MarshalPKCS1PrivateKey(cert.PrivateKey.(*rsa.PrivateKey)))
return certString + "#" + keyString
}
type tcpKeepAliveListener struct {
*net.TCPListener
}
func (ln tcpKeepAliveListener) Accept() (c net.Conn, err error) {
tc, err := ln.AcceptTCP()
if err != nil {
return
}
tc.SetKeepAlive(true)
tc.SetKeepAlivePeriod(3 * time.Minute)
return tc, nil
}

62
types.go Normal file
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@ -0,0 +1,62 @@
package dynamiclistener
import (
"net/http"
)
type ListenerConfigStorage interface {
Set(*ListenerStatus) (*ListenerStatus, error)
Get() (*ListenerStatus, error)
}
type ServerInterface interface {
Update(status *ListenerStatus) error
CACert() (string, error)
}
type UserConfig struct {
// Required fields
Handler http.Handler
HTTPPort int
HTTPSPort int
CertPath string
// Optional fields
KnownIPs []string
Domains []string
Mode string
NoCACerts bool
CACerts string
Cert string
Key string
BindAddress string
}
type ListenerStatus struct {
Revision string `json:"revision,omitempty"`
CACert string `json:"caCert,omitempty"`
CAKey string `json:"caKey,omitempty"`
GeneratedCerts map[string]string `json:"generatedCerts" norman:"nocreate,noupdate"`
KnownIPs map[string]bool `json:"knownIps" norman:"nocreate,noupdate"`
}
func (l *ListenerStatus) DeepCopyInto(t *ListenerStatus) {
t.Revision = l.Revision
t.CACert = l.CACert
t.CAKey = l.CAKey
t.GeneratedCerts = copyMap(t.GeneratedCerts)
t.KnownIPs = map[string]bool{}
for k, v := range l.KnownIPs {
t.KnownIPs[k] = v
}
}
func copyMap(m map[string]string) map[string]string {
ret := map[string]string{}
for k, v := range m {
ret[k] = v
}
return ret
}