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tls.go
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tls.go
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package config
import (
"crypto/tls"
"crypto/x509"
"fmt"
"io/ioutil"
"log"
"net/url"
"sync"
"github.com/mholt/caddy/caddytls"
"github.com/spf13/cobra"
)
var (
DefaultCaUrl = "https://acme-v01.api.letsencrypt.org/directory"
tlsClientOnce = &sync.Once{}
tlsClientConfig = make(map[string]*tls.Config)
tlsServerOnce = &sync.Once{}
tlsServerConfig = make(map[string]*tls.Config)
)
func init() {
cobra.OnInitialize(func() {
// TODO - reactivate this
// We deactivated that because we had a round circle situation for remote sources
// (you need remote source to retrieve the config and you need the cert config to call the remote source)
// Solution would be to retrieve the cert config directly in the env
// tls := GetTLSClientConfig("grpc")
// if tls != nil {
// defaults.InitClient(func() client.Option { return grpcclient.AuthTLS(tls) })
// }
//
// tls = GetTLSServerConfig("grpc")
// if tls != nil {
// defaults.InitServer(func() server.Option { return grpcserver.AuthTLS(tls) })
// }
//
// tls = GetTLSServerConfig("http")
// if tls != nil {
// t := httptransport.NewTransport(transport.TLSConfig(tls), transport.Secure(true))
// defaults.InitHTTPServer(func() server.Option { return server.Transport(t) })
// }
})
}
// GetTLSServerConfig returns the configuration ssl for a server handler
func GetTLSServerConfig(t string) *tls.Config {
tlsServerOnce.Do(func() {
getTLSServerConfig("proxy")
getTLSServerConfig("grpc")
getTLSServerConfig("http")
})
return tlsServerConfig[t]
}
// GetTLSConfig returns the configuration ssl for a server handler
func GetTLSClientConfig(t string) *tls.Config {
tlsClientOnce.Do(func() {
getTLSClientConfig("proxy")
getTLSClientConfig("grpc")
getTLSClientConfig("http")
})
return tlsClientConfig[t]
}
func getTLSServerConfig(t string) {
ssl := Get("cert", t, "ssl").Bool(false)
selfSigned := Get("cert", t, "self").Bool(false)
certFile := Get("cert", t, "certFile").String("")
keyFile := Get("cert", t, "keyFile").String("")
caUrl := Get("cert", t, "caUrl").String("")
if !ssl {
return
}
if certFile != "" && keyFile != "" {
// Directly provided in conf
cert, err := tls.LoadX509KeyPair(certFile, keyFile)
if err != nil {
//log.Fatal("Cannot load client key pair ", err)
fmt.Println("[ERROR] Cannot load client key pair ", err)
return
}
tlsServerConfig[t] = &tls.Config{
Certificates: []tls.Certificate{cert},
}
} else if selfSigned {
// Self signed
// TODO
// THIS is incorrect (this is a client Config, not a server config with self_signed certificates)
// We are not able to retrieve Caddy-generated self-signed certificate
// Shall we generate our own self-signed for gRPC ?
tlsServerConfig[t] = &tls.Config{
InsecureSkipVerify: true,
}
} else if caUrl != "" {
// Auto-cert (let's encrypt)
u, _ := url.Parse(Get("defaults", "url").String(""))
p, e := url.Parse(caUrl)
if e != nil {
fmt.Println("[TLS] Cannot parse caUrl")
return
}
store, e := caddytls.NewFileStorage(p)
if e != nil {
fmt.Println("[TLS] Cannot load TLS File Storage")
return
}
data, err := store.LoadSite(u.Hostname())
if err != nil {
fmt.Printf("[TLS] Cannot load site %s from TLS File Storage\n", u.Hostname())
return
}
if cert, e := tls.X509KeyPair(data.Cert, data.Key); e == nil {
tlsServerConfig[t] = &tls.Config{Certificates: []tls.Certificate{cert}}
} else {
fmt.Println("[TLS] Cannot load certificates loaded from TLS File Storage")
}
}
}
func getTLSClientConfig(t string) {
ssl := Get("cert", t, "ssl").Bool(false)
selfSigned := Get("cert", t, "self").Bool(false)
certFile := Get("cert", t, "certFile").String("")
if !ssl {
return
}
if certFile == "" {
if selfSigned {
tlsClientConfig[t] = &tls.Config{
InsecureSkipVerify: true,
}
}
return
}
b, err := ioutil.ReadFile(certFile)
if err != nil {
log.Fatal("Cannot read cert file", err)
}
cp := x509.NewCertPool()
if !cp.AppendCertsFromPEM(b) {
log.Fatal("Cannot append cert to pool")
}
tlsClientConfig[t] = &tls.Config{
RootCAs: cp,
}
}