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util.go
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util.go
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package quic
import (
"crypto/rand"
"crypto/rsa"
"crypto/tls"
"crypto/x509"
"encoding/pem"
"math/big"
"sync"
"github.com/nanomsg/mangos"
quic "github.com/lucas-clemente/quic-go"
)
type options struct {
sync.RWMutex
opt map[string]interface{}
}
func newOpt() *options { return &options{opt: make(map[string]interface{})} }
// GetOption retrieves an option value.
func (o *options) get(name string) (interface{}, error) {
o.RLock()
defer o.RUnlock()
v, ok := o.opt[name]
if !ok {
return nil, mangos.ErrBadOption
}
return v, nil
}
// SetOption sets an option. We have none, so just ErrBadOption.
func (o *options) set(name string, val interface{}) (err error) {
o.Lock()
defer o.Unlock()
switch name {
case OptionQUICConfig, OptionTLSConfig:
o.opt[name] = val
default:
err = mangos.ErrBadOption
}
return
}
// Setup a bare-bones TLS config for the server
func generateTLSConfig() *tls.Config {
key, err := rsa.GenerateKey(rand.Reader, 1024)
if err != nil {
panic(err)
}
template := x509.Certificate{SerialNumber: big.NewInt(1)}
certDER, err := x509.CreateCertificate(rand.Reader, &template, &template, &key.PublicKey, key)
if err != nil {
panic(err)
}
keyPEM := pem.EncodeToMemory(&pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(key)})
certPEM := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: certDER})
tlsCert, err := tls.X509KeyPair(certPEM, keyPEM)
if err != nil {
panic(err)
}
return &tls.Config{Certificates: []tls.Certificate{tlsCert}, InsecureSkipVerify: true}
}
func getQUICCfg(opt *options) (tc *tls.Config, qc *quic.Config) {
if v, err := opt.get(OptionTLSConfig); err != nil {
tc = generateTLSConfig()
} else {
tc = v.(*tls.Config)
}
// It's acceptable for qc to be nil
if v, err := opt.get(OptionQUICConfig); err == nil {
qc = v.(*quic.Config)
}
return
}
type conn struct {
quic.Session
quic.Stream
}
func (c conn) Close() error { return c.Stream.Close() }