mirror of https://github.com/ehang-io/nps
88 lines
2.0 KiB
Go
88 lines
2.0 KiB
Go
package crypt
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import (
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"crypto/rand"
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"crypto/rsa"
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"crypto/tls"
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"crypto/x509"
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"crypto/x509/pkix"
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"encoding/pem"
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"log"
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"math/big"
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"net"
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"os"
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"time"
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"github.com/astaxie/beego/logs"
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)
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var (
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cert tls.Certificate
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)
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func InitTls() {
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c, k, err := generateKeyPair("NPS Corp,.Inc")
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if err == nil {
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cert, err = tls.X509KeyPair(c, k)
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}
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if err != nil {
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log.Fatalln("Error initializing crypto certs", err)
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}
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}
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func NewTlsServerConn(conn net.Conn) net.Conn {
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var err error
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if err != nil {
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logs.Error(err)
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os.Exit(0)
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return nil
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}
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config := &tls.Config{Certificates: []tls.Certificate{cert}}
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return tls.Server(conn, config)
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}
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func NewTlsClientConn(conn net.Conn) net.Conn {
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conf := &tls.Config{
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InsecureSkipVerify: true,
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}
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return tls.Client(conn, conf)
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}
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func generateKeyPair(CommonName string) (rawCert, rawKey []byte, err error) {
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// Create private key and self-signed certificate
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// Adapted from https://golang.org/src/crypto/tls/generate_cert.go
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priv, err := rsa.GenerateKey(rand.Reader, 2048)
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if err != nil {
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return
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}
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validFor := time.Hour * 24 * 365 * 10 // ten years
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notBefore := time.Now()
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notAfter := notBefore.Add(validFor)
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serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
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serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
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template := x509.Certificate{
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SerialNumber: serialNumber,
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Subject: pkix.Name{
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Organization: []string{"My Company Name LTD."},
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CommonName: CommonName,
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Country: []string{"US"},
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},
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NotBefore: notBefore,
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NotAfter: notAfter,
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KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
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ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
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BasicConstraintsValid: true,
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}
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derBytes, err := x509.CreateCertificate(rand.Reader, &template, &template, &priv.PublicKey, priv)
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if err != nil {
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return
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}
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rawCert = pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: derBytes})
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rawKey = pem.EncodeToMemory(&pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(priv)})
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return
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}
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