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author | Harrison Healey <harrisonmhealey@gmail.com> | 2018-01-16 12:03:31 -0500 |
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committer | GitHub <noreply@github.com> | 2018-01-16 12:03:31 -0500 |
commit | 2fa7c464f019f67c5c0494aaf5ac0f5ecc1ee7a7 (patch) | |
tree | e08ff912e1924c06939f314168c3362d6f1ec0de /vendor/github.com/xenolf/lego/acme/dns_challenge.go | |
parent | f5c8a71698d0a7a16c68be220e49fe64bfee7f5c (diff) | |
download | chat-2fa7c464f019f67c5c0494aaf5ac0f5ecc1ee7a7.tar.gz chat-2fa7c464f019f67c5c0494aaf5ac0f5ecc1ee7a7.tar.bz2 chat-2fa7c464f019f67c5c0494aaf5ac0f5ecc1ee7a7.zip |
Updated dependencies and added avct/uasurfer (#8089)
* Updated dependencies and added avct/uasurfer
* Added uasurfer to NOTICE.txt
Diffstat (limited to 'vendor/github.com/xenolf/lego/acme/dns_challenge.go')
-rw-r--r-- | vendor/github.com/xenolf/lego/acme/dns_challenge.go | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/vendor/github.com/xenolf/lego/acme/dns_challenge.go b/vendor/github.com/xenolf/lego/acme/dns_challenge.go index 133739748..d6844dcd4 100644 --- a/vendor/github.com/xenolf/lego/acme/dns_challenge.go +++ b/vendor/github.com/xenolf/lego/acme/dns_challenge.go @@ -255,6 +255,13 @@ func FindZoneByFqdn(fqdn string, nameservers []string) (string, error) { // Check if we got a SOA RR in the answer section if in.Rcode == dns.RcodeSuccess { + + // CNAME records cannot/should not exist at the root of a zone. + // So we skip a domain when a CNAME is found. + if dnsMsgContainsCNAME(in) { + continue + } + for _, ans := range in.Answer { if soa, ok := ans.(*dns.SOA); ok { zone := soa.Hdr.Name @@ -268,6 +275,16 @@ func FindZoneByFqdn(fqdn string, nameservers []string) (string, error) { return "", fmt.Errorf("Could not find the start of authority") } +// dnsMsgContainsCNAME checks for a CNAME answer in msg +func dnsMsgContainsCNAME(msg *dns.Msg) bool { + for _, ans := range msg.Answer { + if _, ok := ans.(*dns.CNAME); ok { + return true + } + } + return false +} + // ClearFqdnCache clears the cache of fqdn to zone mappings. Primarily used in testing. func ClearFqdnCache() { fqdnToZone = map[string]string{} |