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when suggesting CAA records for a domain, suggest variants that bind to the account id and with validation methods used by mox

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should prevent potential mitm attacks. especially when done close to the
machine itself (where a http/tls challenge is intercepted to get a valid
certificate), as seen on the internet last month.
This commit is contained in:
Mechiel Lukkien
2023-12-21 15:16:30 +01:00
parent ca97293cb2
commit db3fef4981
11 changed files with 123 additions and 28 deletions
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16
main.go
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@ -792,7 +792,21 @@ configured.
xcheckf(err, "looking up record for dnssec-status")
}
records, err := mox.DomainRecords(domConf, d, result.Authentic)
var certIssuerDomainName, acmeAccountURI string
public := mox.Conf.Static.Listeners["public"]
if public.TLS != nil && public.TLS.ACME != "" {
acme, ok := mox.Conf.Static.ACME[public.TLS.ACME]
if ok && acme.Manager.Manager.Client != nil {
certIssuerDomainName = acme.IssuerDomainName
acc, err := acme.Manager.Manager.Client.GetReg(context.Background(), "")
c.log.Check(err, "get public acme account")
if err == nil {
acmeAccountURI = acc.URI
}
}
}
records, err := mox.DomainRecords(domConf, d, result.Authentic, certIssuerDomainName, acmeAccountURI)
xcheckf(err, "records")
fmt.Print(strings.Join(records, "\n") + "\n")
}