/
main.go
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/
main.go
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// Copyright 2017 Istio Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Provide a tool to generate X.509 CSR with different options.
package main
import (
"flag"
"fmt"
"io/ioutil"
"os"
"istio.io/istio/pkg/log"
"istio.io/istio/security/pkg/pki/util"
)
var (
host = flag.String("host", "", "Comma-separated hostnames and IPs to generate a certificate for.")
org = flag.String("organization", "Juju org", "Organization for the cert.")
outCsr = flag.String("out-csr", "csr.pem", "Output csr file.")
outPriv = flag.String("out-priv", "priv.pem", "Output private key file.")
keySize = flag.Int("key-size", 2048, "Size of the generated private key")
)
func fatalf(template string, args ...interface{}) {
log.Errorf(template, args...)
os.Exit(-1)
}
func saveCreds(csrPem []byte, privPem []byte) {
err := ioutil.WriteFile(*outCsr, csrPem, 0644)
if err != nil {
fatalf("Could not write output certificate request: %s.", err)
}
err = ioutil.WriteFile(*outPriv, privPem, 0600)
if err != nil {
fatalf("Could not write output private key: %s.", err)
}
}
func main() {
flag.Parse()
csrPem, privPem, err := util.GenCSR(util.CertOptions{
Host: *host,
Org: *org,
RSAKeySize: *keySize,
})
if err != nil {
fatalf("Failed to generate CSR: %s.", err)
}
saveCreds(csrPem, privPem)
fmt.Printf("Certificate and private files successfully saved in %s and %s\n", *outCsr, *outPriv)
}