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tls_connect.go
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tls_connect.go
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/* This file is part of VoltDB.
* Copyright (C) 2022 Volt Active Data Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with VoltDB. If not, see <http://www.gnu.org/licenses/>.
*/
package main
/*
* Program testing how go handles TLS handshake and server certificate validation.
* Note: couldn't use main_test.go in same directory because it can't be used under GoLand debugger.
*
* Examples:
* go run . -h
* go run . -pem=/Users/rdykiel/ssl/server/volt.certstore.pem
* go run . -altserver=voltdb.com -pem=/Users/rdykiel/ssl/server/volt.certstore.pem
* go run . -altserver=foo.voltdb.com -pem=/Users/rdykiel/ssl/server/volt.certstore.pem
* go run . -altserver=goo.voltdb.com -pem=/Users/rdykiel/ssl/server/volt.certstore.pem
* go run . -insecure
*
* Certificate validation: if insecure = false, go expects to find server or altServer in the
* SubjectAlternativeName extension of the PEM certificate, e.g.:
*
* 1: ObjectId: 2.5.29.17 Criticality=false
* SubjectAlternativeName [
* IPAddress: 127.0.0.1
* DNSName: voltdb.com
* DNSName: foo.voltdb.com
* DNSName: bar.voltdb.com
* ]
*/
import (
"crypto/tls"
"database/sql/driver"
"errors"
"flag"
"github.com/VoltDB/voltdb-client-go/voltdbclient"
"github.com/kr/pretty"
"log"
)
func tlsConnect(server string, altServer string, pemPath string, insecure bool) {
log.Printf("Connecting to %s: altServer %s, pemPath %s, insecure %t",
server, altServer, pemPath, insecure)
// Keep tlsConfig nil unless altServer is provided: in this case we request to
// validate the alternate name instead of the server name
var tlsConfig *tls.Config
if altServer != "" {
tlsConfig = &tls.Config{
InsecureSkipVerify: insecure,
ServerName: altServer,
}
}
conn, err := voltdbclient.OpenTLSConn(server, voltdbclient.ClientConfig{
PEMPath: pemPath,
TLSConfig: tlsConfig,
InsecureSkipVerify: insecure,
ConnectTimeout: 60000000,
})
if err != nil {
log.Fatal(err)
} else if conn == nil {
log.Fatal(errors.New("no connection"))
} else {
log.Printf("connected to: %s", server)
}
var params []driver.Value
for _, s := range []interface{}{"PAUSE_CHECK", int32(0)} {
params = append(params, s)
}
vr, err := conn.Query("@Statistics", params)
if err != nil {
log.Fatal(err)
}
pretty.Print(vr)
log.Println()
log.Printf("SUCCESS")
//defer conn.Close()
}
func main() {
server := flag.String("server", "127.0.0.1", "Server name or IP address")
altServer := flag.String("altserver", "", "Server name to validate instead of server")
pemPath := flag.String("pem", "", "Full path to PEM file")
insecure := flag.Bool("insecure", false, "If true, bypass validation")
flag.Parse()
tlsConnect(*server, *altServer, *pemPath, *insecure)
}