diff options
Diffstat (limited to 'libgo/go/crypto/tls/generate_cert.go')
-rw-r--r-- | libgo/go/crypto/tls/generate_cert.go | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/libgo/go/crypto/tls/generate_cert.go b/libgo/go/crypto/tls/generate_cert.go new file mode 100644 index 000000000..3e0c63938 --- /dev/null +++ b/libgo/go/crypto/tls/generate_cert.go @@ -0,0 +1,70 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Generate a self-signed X.509 certificate for a TLS server. Outputs to +// 'cert.pem' and 'key.pem' and will overwrite existing files. + +package main + +import ( + "crypto/rsa" + "crypto/rand" + "crypto/x509" + "encoding/pem" + "flag" + "log" + "os" + "time" +) + +var hostName *string = flag.String("host", "127.0.0.1", "Hostname to generate a certificate for") + +func main() { + flag.Parse() + + priv, err := rsa.GenerateKey(rand.Reader, 1024) + if err != nil { + log.Exitf("failed to generate private key: %s", err) + return + } + + now := time.Seconds() + + template := x509.Certificate{ + SerialNumber: []byte{0}, + Subject: x509.Name{ + CommonName: *hostName, + Organization: []string{"Acme Co"}, + }, + NotBefore: time.SecondsToUTC(now - 300), + NotAfter: time.SecondsToUTC(now + 60*60*24*365), // valid for 1 year. + + SubjectKeyId: []byte{1, 2, 3, 4}, + KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature, + } + + derBytes, err := x509.CreateCertificate(rand.Reader, &template, &template, &priv.PublicKey, priv) + if err != nil { + log.Exitf("Failed to create certificate: %s", err) + return + } + + certOut, err := os.Open("cert.pem", os.O_WRONLY|os.O_CREAT, 0644) + if err != nil { + log.Exitf("failed to open cert.pem for writing: %s", err) + return + } + pem.Encode(certOut, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes}) + certOut.Close() + log.Print("written cert.pem\n") + + keyOut, err := os.Open("key.pem", os.O_WRONLY|os.O_CREAT, 0600) + if err != nil { + log.Print("failed to open key.pem for writing:", err) + return + } + pem.Encode(keyOut, &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(priv)}) + keyOut.Close() + log.Print("written key.pem\n") +} |