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cert.go
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cert.go
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package main
import (
"crypto/tls"
"crypto/x509"
"errors"
"io/ioutil"
"net"
"net/http"
"strings"
"github.com/TykTechnologies/tyk/certs"
"github.com/TykTechnologies/tyk/config"
"github.com/gorilla/mux"
)
type APICertificateStatusMessage struct {
CertID string `json:"id"`
Status string `json:"status"`
Message string `json:"message"`
}
type APIAllCertificates struct {
CertIDs []string `json:"certs"`
}
var cipherSuites = map[string]uint16{
"TLS_RSA_WITH_RC4_128_SHA": 0x0005,
"TLS_RSA_WITH_3DES_EDE_CBC_SHA": 0x000a,
"TLS_RSA_WITH_AES_128_CBC_SHA": 0x002f,
"TLS_RSA_WITH_AES_256_CBC_SHA": 0x0035,
"TLS_RSA_WITH_AES_128_CBC_SHA256": 0x003c,
"TLS_RSA_WITH_AES_128_GCM_SHA256": 0x009c,
"TLS_RSA_WITH_AES_256_GCM_SHA384": 0x009d,
"TLS_ECDHE_ECDSA_WITH_RC4_128_SHA": 0xc007,
"TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA": 0xc009,
"TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA": 0xc00a,
"TLS_ECDHE_RSA_WITH_RC4_128_SHA": 0xc011,
"TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA": 0xc012,
"TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA": 0xc013,
"TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA": 0xc014,
"TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256": 0xc023,
"TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256": 0xc027,
"TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256": 0xc02f,
"TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256": 0xc02b,
"TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384": 0xc030,
"TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384": 0xc02c,
"TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305": 0xcca8,
"TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305": 0xcca9,
}
var certLog = log.WithField("prefix", "certs")
func getUpstreamCertificate(host string, spec *APISpec) (cert *tls.Certificate) {
var certID string
certMaps := []map[string]string{config.Global().Security.Certificates.Upstream}
if spec != nil && spec.UpstreamCertificates != nil {
certMaps = append(certMaps, spec.UpstreamCertificates)
}
for _, m := range certMaps {
if len(m) == 0 {
continue
}
if id, ok := m["*"]; ok {
certID = id
}
hostParts := strings.SplitN(host, ".", 2)
if len(hostParts) > 1 {
hostPattern := "*." + hostParts[1]
if id, ok := m[hostPattern]; ok {
certID = id
}
}
if id, ok := m[host]; ok {
certID = id
}
}
if certID == "" {
return nil
}
certs := CertificateManager.List([]string{certID}, certs.CertificatePrivate)
if len(certs) == 0 {
return nil
}
return certs[0]
}
func verifyPeerCertificatePinnedCheck(spec *APISpec, tlsConfig *tls.Config) func(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error {
if (spec == nil || len(spec.PinnedPublicKeys) == 0) && len(config.Global().Security.PinnedPublicKeys) == 0 {
return nil
}
tlsConfig.InsecureSkipVerify = true
whitelist := getPinnedPublicKeys("*", spec)
if len(whitelist) == 0 {
return nil
}
return func(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error {
certLog.Debug("Checking certificate public key")
for _, rawCert := range rawCerts {
cert, _ := x509.ParseCertificate(rawCert)
pub, err := x509.MarshalPKIXPublicKey(cert.PublicKey)
if err != nil {
continue
}
fingerprint := certs.HexSHA256(pub)
for _, w := range whitelist {
if w == fingerprint {
return nil
}
}
}
return errors.New("Certificate public key pinning error. Public keys do not match.")
}
}
func dialTLSPinnedCheck(spec *APISpec, tc *tls.Config) func(network, addr string) (net.Conn, error) {
if (spec == nil || len(spec.PinnedPublicKeys) == 0) && len(config.Global().Security.PinnedPublicKeys) == 0 {
return nil
}
return func(network, addr string) (net.Conn, error) {
clone := tc.Clone()
clone.InsecureSkipVerify = true
c, err := tls.Dial(network, addr, clone)
if err != nil {
return c, err
}
host, _, _ := net.SplitHostPort(addr)
whitelist := getPinnedPublicKeys(host, spec)
if len(whitelist) == 0 {
return c, nil
}
certLog.Debug("Checking certificate public key for host:", host)
state := c.ConnectionState()
for _, peercert := range state.PeerCertificates {
der, err := x509.MarshalPKIXPublicKey(peercert.PublicKey)
if err != nil {
continue
}
fingerprint := certs.HexSHA256(der)
for _, w := range whitelist {
if w == fingerprint {
return c, nil
}
}
}
return nil, errors.New("https://" + host + " certificate public key pinning error. Public keys do not match.")
}
}
func getPinnedPublicKeys(host string, spec *APISpec) (fingerprint []string) {
var keyIDs string
pinMaps := []map[string]string{config.Global().Security.PinnedPublicKeys}
if spec != nil && spec.PinnedPublicKeys != nil {
pinMaps = append(pinMaps, spec.PinnedPublicKeys)
}
for _, m := range pinMaps {
if len(m) == 0 {
continue
}
if id, ok := m["*"]; ok {
keyIDs = id
}
hostParts := strings.SplitN(host, ".", 2)
if len(hostParts) > 1 {
hostPattern := "*." + hostParts[1]
if id, ok := m[hostPattern]; ok {
keyIDs = id
}
}
if id, ok := m[host]; ok {
keyIDs = id
}
}
if keyIDs == "" {
return nil
}
return CertificateManager.ListPublicKeys(strings.Split(keyIDs, ","))
}
// dummyGetCertificate needed because TLSConfig require setting Certificates array or GetCertificate function from start, even if it get overriden by `getTLSConfigForClient`
func dummyGetCertificate(*tls.ClientHelloInfo) (*tls.Certificate, error) {
return nil, nil
}
func getTLSConfigForClient(baseConfig *tls.Config, listenPort int) func(hello *tls.ClientHelloInfo) (*tls.Config, error) {
// Supporting legacy certificate configuration
serverCerts := []tls.Certificate{}
certNameMap := map[string]*tls.Certificate{}
for _, certData := range config.Global().HttpServerOptions.Certificates {
cert, err := tls.LoadX509KeyPair(certData.CertFile, certData.KeyFile)
if err != nil {
log.Errorf("Server error: loadkeys: %s", err)
continue
}
serverCerts = append(serverCerts, cert)
certNameMap[certData.Name] = &cert
}
for _, cert := range CertificateManager.List(config.Global().HttpServerOptions.SSLCertificates, certs.CertificatePrivate) {
serverCerts = append(serverCerts, *cert)
}
baseConfig.Certificates = serverCerts
baseConfig.BuildNameToCertificate()
for name, cert := range certNameMap {
baseConfig.NameToCertificate[name] = cert
}
return func(hello *tls.ClientHelloInfo) (*tls.Config, error) {
newConfig := baseConfig.Clone()
isControlAPI := (listenPort != 0 && config.Global().ControlAPIPort == listenPort) || (config.Global().ControlAPIHostname == hello.ServerName)
if isControlAPI && config.Global().Security.ControlAPIUseMutualTLS {
newConfig.ClientAuth = tls.RequireAndVerifyClientCert
newConfig.ClientCAs = CertificateManager.CertPool(config.Global().Security.Certificates.ControlAPI)
return newConfig, nil
}
apisMu.RLock()
for _, spec := range apiSpecs {
if spec.UseMutualTLSAuth && spec.Domain != "" && spec.Domain == hello.ServerName {
newConfig.ClientAuth = tls.RequireAndVerifyClientCert
certIDs := append(spec.ClientCertificates, config.Global().Security.Certificates.API...)
newConfig.ClientCAs = CertificateManager.CertPool(certIDs)
break
}
}
// No mutual tls APIs with matched domain found
// Check if one of APIs without domain, require asking client cert
if newConfig.ClientAuth == tls.NoClientCert {
for _, spec := range apiSpecs {
if spec.Auth.UseCertificate || (spec.Domain == "" && spec.UseMutualTLSAuth) {
newConfig.ClientAuth = tls.RequestClientCert
break
}
}
}
apisMu.RUnlock()
return newConfig, nil
}
}
func certHandler(w http.ResponseWriter, r *http.Request) {
certID := mux.Vars(r)["certID"]
switch r.Method {
case "POST":
content, err := ioutil.ReadAll(r.Body)
if err != nil {
doJSONWrite(w, 405, apiError("Malformed request body"))
return
}
orgID := r.URL.Query().Get("org_id")
var certID string
if certID, err = CertificateManager.Add(content, orgID); err != nil {
doJSONWrite(w, http.StatusForbidden, apiError(err.Error()))
return
}
doJSONWrite(w, http.StatusOK, &APICertificateStatusMessage{certID, "ok", "Certificate added"})
case "GET":
if certID == "" {
orgID := r.URL.Query().Get("org_id")
certIds := CertificateManager.ListAllIds(orgID)
doJSONWrite(w, http.StatusOK, &APIAllCertificates{certIds})
return
}
certIDs := strings.Split(certID, ",")
certificates := CertificateManager.List(certIDs, certs.CertificateAny)
if len(certIDs) == 1 {
if certificates[0] == nil {
doJSONWrite(w, http.StatusNotFound, apiError("Certificate with given SHA256 fingerprint not found"))
return
}
doJSONWrite(w, http.StatusOK, certs.ExtractCertificateMeta(certificates[0], certIDs[0]))
return
} else {
var meta []*certs.CertificateMeta
for ci, cert := range certificates {
if cert != nil {
meta = append(meta, certs.ExtractCertificateMeta(cert, certIDs[ci]))
} else {
meta = append(meta, nil)
}
}
doJSONWrite(w, http.StatusOK, meta)
return
}
case "DELETE":
CertificateManager.Delete(certID)
doJSONWrite(w, http.StatusOK, &apiStatusMessage{"ok", "removed"})
}
}
func getCipherAliases(ciphers []string) (cipherCodes []uint16) {
for k, v := range cipherSuites {
for _, str := range ciphers {
if str == k {
cipherCodes = append(cipherCodes, v)
}
}
}
return cipherCodes
}