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fix panic if dns.RR is not a *dns.TXT

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This commit is contained in:
Vladimir Bauer 2019-10-17 20:29:08 +05:00 committed by Frank Denis
parent 55c6cb6c79
commit 108b7f8446
1 changed files with 8 additions and 1 deletions
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9
dnscrypt-proxy/dnscrypt_certs.go
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@ -43,7 +43,14 @@ func FetchCurrentDNSCryptCert(proxy *Proxy, serverName *string, proto string, pk
highestSerial := uint32(0)
var certCountStr string
for _, answerRr := range in.Answer {
binCert, err := packTxtString(strings.Join(answerRr.(*dns.TXT).Txt, ""))
var txt string
if t, ok := answerRr.(*dns.TXT); !ok {
dlog.Warnf("[%v] Certificate not found", providerName)
continue
} else {
txt = strings.Join(t.Txt, "")
}
binCert, err := packTxtString(txt)
if err != nil {
dlog.Warnf("[%v] Unable to unpack the certificate", providerName)
continue