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| author | Kim Alvefur <zash@zash.se> | 2022-08-02 16:08:43 +0200 |
|---|---|---|
| committer | Kim Alvefur <zash@zash.se> | 2022-08-02 16:08:43 +0200 |
| commit | 79f4868b63ff6385bbc2290ba31361bcb7ce63b5 (patch) | |
| tree | 664455f647704b3ea46012dfa1186544be577e81 /net/resolvers | |
| parent | 9a375e444474e1e6a97ae57f393f639cfa813846 (diff) | |
| download | prosody-79f4868b63ff6385bbc2290ba31361bcb7ce63b5.tar.gz prosody-79f4868b63ff6385bbc2290ba31361bcb7ce63b5.zip | |
net.resolvers.basic: Add opt-out argument for DNSSEC security status
This makes explicit which lookups can accept an unsigned response.
Insecure (unsigned, as before DNSSEC) A and AAAA records can be used as
security would come from TLS, but an insecure TLSA record is worthless.
Diffstat (limited to 'net/resolvers')
| -rw-r--r-- | net/resolvers/basic.lua | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/net/resolvers/basic.lua b/net/resolvers/basic.lua index 15338ff4..e58165ba 100644 --- a/net/resolvers/basic.lua +++ b/net/resolvers/basic.lua @@ -10,7 +10,7 @@ local resolver_mt = { __index = methods }; -- FIXME RFC 6724 -local function do_dns_lookup(self, dns_resolver, record_type, name) +local function do_dns_lookup(self, dns_resolver, record_type, name, allow_insecure) return promise.new(function (resolve, reject) local ipv = (record_type == "A" and "4") or (record_type == "AAAA" and "6") or nil; if ipv and self.extra["use_ipv"..ipv] == false then @@ -23,6 +23,8 @@ local function do_dns_lookup(self, dns_resolver, record_type, name) return reject(err); elseif answer.bogus then return reject(("Validation error in %s lookup"):format(record_type)); + elseif not (answer.secure or allow_insecure) then + return reject(("Insecure response in %s lookup"):format(record_type)); elseif answer.status and #answer == 0 then return reject(("%s in %s lookup"):format(answer.status, record_type)); end @@ -78,8 +80,8 @@ function methods:next(cb) local dns_resolver = adns.resolver(); local dns_lookups = { - ipv4 = do_dns_lookup(self, dns_resolver, "A", self.hostname); - ipv6 = do_dns_lookup(self, dns_resolver, "AAAA", self.hostname); + ipv4 = do_dns_lookup(self, dns_resolver, "A", self.hostname, true); + ipv6 = do_dns_lookup(self, dns_resolver, "AAAA", self.hostname, true); tlsa = do_dns_lookup(self, dns_resolver, "TLSA", ("_%d._%s.%s"):format(self.port, self.conn_type, self.hostname)); }; |