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Prefer explicit construction to coercion in record initialization

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While we support initializing records via coercion from an expression
list, e.g.,

    local x: X = [$x1=1, $x2=2];

this can sometimes obscure the code to readers, e.g., when assigning to
value declared and typed elsewhere. The language runtime has a similar
overhead since instead of just constructing a known type it needs to
check at runtime that the coercion from the expression list is valid;
this can be slower than just writing the readible code in the first
place, see #4559.

With this patch we use explicit construction, e.g.,

    local x = X($x1=1, $x2=2);
This commit is contained in:
Benjamin Bannier 2025-07-10 09:42:44 +02:00 • committed by Christian Kreibich
parent 54f9e45597
commit d5fd29edcd
139 changed files with 786 additions and 788 deletions
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61
scripts/policy/protocols/ssh/detect-bruteforcing.zeek
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@ -41,41 +41,42 @@ export {
event zeek_init()
{
local r1: SumStats::Reducer = [$stream="ssh.login.failure", $apply=set(SumStats::SUM, SumStats::SAMPLE), $num_samples=5];
SumStats::create([$name="detect-ssh-bruteforcing",
$epoch=guessing_timeout,
$reducers=set(r1),
$threshold_val(key: SumStats::Key, result: SumStats::Result) =
{
return result["ssh.login.failure"]$sum;
},
$threshold=password_guesses_limit,
$threshold_crossed(key: SumStats::Key, result: SumStats::Result) =
{
local r = result["ssh.login.failure"];
local sub_msg = fmt("Sampled servers: ");
local samples = r$samples;
for ( i in samples )
{
if ( samples[i]?$str )
sub_msg = fmt("%s%s %s", sub_msg, i==0 ? "":",", samples[i]$str);
}
# Generate the notice.
NOTICE([$note=Password_Guessing,
$msg=fmt("%s appears to be guessing SSH passwords (seen in %d connections).", key$host, r$num),
$sub=sub_msg,
$src=key$host,
$identifier=cat(key$host)]);
}]);
local r1 = SumStats::Reducer($stream="ssh.login.failure", $apply=set(SumStats::SUM, SumStats::SAMPLE), $num_samples=5);
SumStats::create(SumStats::SumStat(
$name="detect-ssh-bruteforcing",
$epoch=guessing_timeout,
$reducers=set(r1),
$threshold_val(key: SumStats::Key, result: SumStats::Result) =
{
return result["ssh.login.failure"]$sum;
},
$threshold=password_guesses_limit,
$threshold_crossed(key: SumStats::Key, result: SumStats::Result) =
{
local r = result["ssh.login.failure"];
local sub_msg = fmt("Sampled servers: ");
local samples = r$samples;
for ( i in samples )
{
if ( samples[i]?$str )
sub_msg = fmt("%s%s %s", sub_msg, i==0 ? "":",", samples[i]$str);
}
# Generate the notice.
NOTICE(Notice::Info($note=Password_Guessing,
$msg=fmt("%s appears to be guessing SSH passwords (seen in %d connections).", key$host, r$num),
$sub=sub_msg,
$src=key$host,
$identifier=cat(key$host)));
}));
}
event ssh_auth_successful(c: connection, auth_method_none: bool)
{
local id = c$id;
Intel::seen([$host=id$orig_h,
$conn=c,
$where=SSH::SUCCESSFUL_LOGIN]);
Intel::seen(Intel::Seen($host=id$orig_h,
$conn=c,
$where=SSH::SUCCESSFUL_LOGIN));
}
event ssh_auth_failed(c: connection)
@ -86,5 +87,5 @@ event ssh_auth_failed(c: connection)
# be ignored.
if ( ! (id$orig_h in ignore_guessers &&
id$resp_h in ignore_guessers[id$orig_h]) )
SumStats::observe("ssh.login.failure", [$host=id$orig_h], [$str=cat(id$resp_h)]);
SumStats::observe("ssh.login.failure", SumStats::Key($host=id$orig_h), SumStats::Observation($str=cat(id$resp_h)));
}