adding new way to generate cert
This commit is contained in:
PierreZ
parent
8d09f7a0e0
commit
b4d0cb51ef
2 changed files with 10 additions and 150 deletions
BIN
goStatic
BIN
goStatic
Binary file not shown.
158
main.go
158
main.go
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@ -4,23 +4,12 @@
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package main // import "github.com/PierreZ/goStatic"
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import (
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"crypto/ecdsa"
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"crypto/elliptic"
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"crypto/rand"
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"crypto/rsa"
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"crypto/x509"
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"crypto/x509/pkix"
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"encoding/pem"
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"flag"
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"fmt"
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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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"strconv"
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"strings"
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"time"
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"github.com/PierreZ/tlscert"
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"github.com/labstack/echo"
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mw "github.com/labstack/echo/middleware"
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)
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@ -31,14 +20,6 @@ var (
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pathPtr = flag.String("static", "/srv/http", "The path for the static files")
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crtPtr = flag.String("crt", "/etc/ssl/server", "Folder for server.pem and key.pem")
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HTTPPtr = flag.Bool("forceHTTP", false, "Forcing HTTP and not HTTPS")
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// var for cert
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host = flag.String("host", "", "Comma-separated hostnames and IPs to generate a certificate for")
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validFrom = flag.String("start-date", "", "Creation date formatted as Jan 1 15:04:05 2011")
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validFor = flag.Duration("duration", 365*24*time.Hour, "Duration that certificate is valid for")
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isCA = flag.Bool("ca", false, "whether this cert should be its own Certificate Authority")
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rsaBits = flag.Int("rsa-bits", 2048, "Size of RSA key to generate. Ignored if --ecdsa-curve is set")
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ecdsaCurve = flag.String("ecdsa-curve", "", "ECDSA curve to use to generate a key. Valid values are P224, P256, P384, P521")
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)
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func main() {
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@ -58,145 +39,24 @@ func main() {
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log.Println("Starting goStatic")
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port := ":" + strconv.FormatInt(int64(*portPtr), 10)
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path := *crtPtr
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// Start server with unsecure HTTP
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// or with awesome TLS
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if *HTTPPtr {
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log.Println("Starting serving", *pathPtr, "on", *portPtr)
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e.Run(port)
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// or with awesome TLS
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} else {
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// Check for cert
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_, err := os.Stat(*crtPtr + "cert.pem")
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if _, err := os.Stat(path + "/cert.pem"); os.IsNotExist(err) {
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// Generating certificates
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err := tlscert.GenerateCert(path)
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if err != nil {
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log.Println("Cert not found, generating .pem and .crt file")
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generateCert(*crtPtr)
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log.Fatalf("Failed generating certs: %v", err)
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}
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}
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log.Println("Starting serving", *pathPtr, "on", *portPtr)
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e.RunTLS(port, *crtPtr+"cert.pem", *crtPtr+"key.pem")
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e.RunTLS(port, path+"/cert.pem", path+"/key.pem")
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}
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}
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// Based on https://golang.org/src/crypto/tls/generate_cert.go
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func generateCert(path string) {
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var priv interface{}
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var err error
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switch *ecdsaCurve {
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case "":
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priv, err = rsa.GenerateKey(rand.Reader, *rsaBits)
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case "P224":
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priv, err = ecdsa.GenerateKey(elliptic.P224(), rand.Reader)
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case "P256":
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priv, err = ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
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case "P384":
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priv, err = ecdsa.GenerateKey(elliptic.P384(), rand.Reader)
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case "P521":
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priv, err = ecdsa.GenerateKey(elliptic.P521(), rand.Reader)
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default:
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fmt.Fprintf(os.Stderr, "Unrecognized elliptic curve: %q", *ecdsaCurve)
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os.Exit(1)
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}
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if err != nil {
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log.Fatalf("failed to generate private key: %s", err)
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}
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var notBefore time.Time
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if len(*validFrom) == 0 {
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notBefore = time.Now()
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} else {
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notBefore, err = time.Parse("Jan 2 15:04:05 2006", *validFrom)
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if err != nil {
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fmt.Fprintf(os.Stderr, "Failed to parse creation date: %s\n", err)
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os.Exit(1)
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}
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}
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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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if err != nil {
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log.Fatalf("failed to generate serial number: %s", err)
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}
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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{"Hooli"},
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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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hosts := strings.Split(*host, ",")
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for _, h := range hosts {
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if ip := net.ParseIP(h); ip != nil {
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template.IPAddresses = append(template.IPAddresses, ip)
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} else {
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template.DNSNames = append(template.DNSNames, h)
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}
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}
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if *isCA {
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template.IsCA = true
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template.KeyUsage |= x509.KeyUsageCertSign
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}
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derBytes, err := x509.CreateCertificate(rand.Reader, &template, &template, publicKey(priv), priv)
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if err != nil {
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log.Fatalf("Failed to create certificate: %s", err)
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}
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certOut, err := os.Create(path + "cert.pem")
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if err != nil {
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log.Fatalf("failed to open cert.pem for writing: %s", err)
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}
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pem.Encode(certOut, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes})
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certOut.Close()
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log.Print("written cert.pem\n")
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keyOut, err := os.OpenFile(path+"key.pem", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
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if err != nil {
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log.Print("failed to open key.pem for writing:", err)
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return
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}
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pem.Encode(keyOut, pemBlockForKey(priv))
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keyOut.Close()
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log.Print("written key.pem\n")
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}
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// Based on https://golang.org/src/crypto/tls/generate_cert.go
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func publicKey(priv interface{}) interface{} {
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switch k := priv.(type) {
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case *rsa.PrivateKey:
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return &k.PublicKey
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case *ecdsa.PrivateKey:
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return &k.PublicKey
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default:
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return nil
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}
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}
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// Based on https://golang.org/src/crypto/tls/generate_cert.go
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func pemBlockForKey(priv interface{}) *pem.Block {
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switch k := priv.(type) {
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case *rsa.PrivateKey:
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return &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(k)}
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case *ecdsa.PrivateKey:
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b, err := x509.MarshalECPrivateKey(k)
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if err != nil {
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fmt.Fprintf(os.Stderr, "Unable to marshal ECDSA private key: %v", err)
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os.Exit(2)
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}
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return &pem.Block{Type: "EC PRIVATE KEY", Bytes: b}
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default:
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return nil
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}
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}
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