3 files changed, 5 insertions, 28 deletions
diff --git a/Changelog b/Changelog
index 31ad97d..43265ce 100644
--- a/Changelog
+++ b/Changelog
@@ -1,6 +1,8 @@
 lacme (0.6) UNRELEASED
 
  + client: poll order URL instead of each authz URL successively.
+ - lacme, client: new dependency Date::Parse, don't parse RFC 3339
+   datetime strings from X.509 certs manually.
 
  -- Guilhem Moulin <guilhem@fripost.org>  Mon, 21 Jan 2019 02:07:58 +0100
 
diff --git a/client b/client
index 9ce52a0..c152e30 100755
--- a/client
+++ b/client
@@ -50,6 +50,7 @@ use Fcntl qw/O_CREAT O_EXCL O_WRONLY/;
 use Digest::SHA qw/sha256 sha256_hex/;
 use MIME::Base64 qw/encode_base64 encode_base64url/;
 
+use Date::Parse ();
 use LWP::UserAgent ();
 use Types::Serialiser ();
 use JSON ();
@@ -148,7 +149,6 @@ sub request_retry_after($) {
     my $r = shift;
     my $v = $r->header('Retry-After');
     if (defined $v and $v !~ /\A\d+\z/) {
-        require 'Date/Parse.pm';
         $v = Date::Parse::str2time($v);
         if (defined $v) {
             $v = $v - time;
diff --git a/lacme b/lacme
index 3e5347d..cc94149 100755
--- a/lacme
+++ b/lacme
@@ -36,6 +36,7 @@ use Socket 1.95 qw/AF_UNIX AF_INET AF_INET6 PF_UNIX PF_INET PF_INET6 PF_UNSPEC
                    SOCK_STREAM SOL_SOCKET SO_REUSEADDR SHUT_RDWR/;
 
 use Config::Tiny ();
+use Date::Parse ();
 use Net::SSLeay ();
 
 # Clean up PATH
@@ -199,33 +200,7 @@ sub x509_enddate($) {
     $time = Net::SSLeay::X509_get_notAfter($x509)       if defined $x509;
     $dt   = Net::SSLeay::P_ASN1_TIME_get_isotime($time) if defined $time;
 
-    my $t;
-    if (defined $dt and $dt =~ s/\A(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})//) {
-        # RFC3339 datetime strings; assume epoch is on January 1 of $epoch_year
-        my ($y, $m, $d, $h, $min, $s) = ($1, $2, $3, $4, $5, $6);
-        my (undef,undef,undef,undef,undef,$epoch_year,undef,undef,undef) = gmtime(0);
-        $t = 0;
-        foreach (($epoch_year+1900) .. $y-1) {
-            $t += 365*86400;
-            $t += 86400 if ($_ % 4 == 0 and $_ % 100 != 0) or ($_ % 400 == 0); # leap
-        }
-
-        if ($m > 1) {
-            my @m = (31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
-            $m[1]++ if ($y % 4 == 0 and $y % 100 != 0) or ($y % 400 == 0); # leap
-            $t += 86400*$m[$_] for (0 .. $m-2);
-        }
-
-        $t += 86400*($d-1);
-        $t += $s + 60*($min + 60*$h);
-
-        $dt =~ s/\A\.(\d{1,9})\d*//; # ignore nanosecs
-
-        if ($dt =~ /\A([+-])(\d{2}):(\d{2})\z/) {
-            my $tz = 60*($3 + 60*$2);
-            $t = $1 eq '-' ? ($t+$tz) : ($t-$tz);
-        }
-    }
+    my $t = Date::Parse::str2time($dt) if defined $dt;
 
     Net::SSLeay::X509_free($x509) if defined $x509;
     Net::SSLeay::BIO_free($bio)   if defined $bio;