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package main
import (
"crypto/tls"
"encoding/pem"
"flag"
"fmt"
"regexp"
"github.com/kisom/goutils/die"
)
var hasPort = regexp.MustCompile(`:\d+$`)
func main() {
flag.Parse()
for _, server := range flag.Args() {
if !hasPort.MatchString(server) {
server += ":443"
}
var chain string
conn, err := tls.Dial("tcp", server, nil)
die.If(err)
details := conn.ConnectionState()
for _, cert := range details.PeerCertificates {
p := pem.Block{
Type: "CERTIFICATE",
Bytes: cert.Raw,
}
chain += string(pem.EncodeToMemory(&p))
}
fmt.Println(chain)
}
}
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