[Mimedefang] DKIM body hash won't verify.
Matthew Schumacher
matt.s at aptalaska.net
Fri Feb 22 13:57:28 EST 2019
List,
I just put DKIM on my mail system, but gmail rejects with "body hash did
not verify", so something is wrong with how I'm hashing. Does this code
look reasonable?
sub dkim_sign {
my $dkim = Mail::DKIM::Signer->new(
Algorithm => "rsa-sha1",
Method => "relaxed",
Domain => "domain.net",
Selector => "beta",
KeyFile => "/etc/mail/dkim.key");
if (open(TOSIGN, "<SIGNME")) {
while(<TOSIGN>) {
# remove local line terminators
chomp;
s/\015$//;
# use SMTP line terminators
$dkim->PRINT("$_\015\012");
}
close(TOSIGN);
$dkim->CLOSE();
my $signature = $dkim->signature()->as_string();
$signature =~ s/^DKIM-Signature:\s+//i;
action_add_header('DKIM-Signature', $signature);
}
}
sub filter_wrapup {
my($entity) = @_;
open(my $fh, '>', "./SIGNME") or die "Could not open file 'SIGNME' $!";
print $fh $entity->stringify();
close $fh;
dkim_sign();
}
I got the key from https://dkimcore.org/tools/ to make sure I got
something workable, perhaps that is the issue.
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