x.encoding.asn1: fix time creation to also accommodate negative timez…

…one offsets (#22861)

vlib/x/encoding/asn1/time.v

@@ -56,7 +56,7 @@ fn UtcTime.from_time(t time.Time) !UtcTime {
 	s := utime.custom_format(default_utctime_format) //  20241113060446+0
 	// Its rather a hack, not efieient as should be.
 	// TODO: make it better
-	str := s.split('+')
+	str := s.split_any('+-')
 	val := str[0] + 'Z'
 	utc := UtcTime.new(val)!
 	return utc
@@ -231,7 +231,7 @@ pub fn GeneralizedTime.from_time(t time.Time) !GeneralizedTime {
 	u := t.local_to_utc()
 	s := u.custom_format(default_genztime_format)
 	// adds support directly from time.Time
-	src := s.split('+')
+	src := s.split_any('+-')
 	val := src[0] + 'Z'
 	gt := GeneralizedTime.new(val)!
 

vlib/x/encoding/asn1/time_test.v

@@ -3,6 +3,7 @@
 // that can be found in the LICENSE file.
 module asn1
 
+import os
 import time
 
 fn test_serialize_utctime_basic() ! {
@@ -42,6 +43,18 @@ fn test_create_utctime_from_std_time() ! {
 	assert tinp_back.value == inp
 }
 
+fn test_create_utctime_from_std_time_with_negative_offset() ! {
+	tz := os.getenv('TZ')
+	os.setenv('TZ', 'utc 1', true)
+
+	defer {
+		os.setenv('TZ', tz, true)
+	}
+
+	now := time.new(year: 2024, month: 11, day: 13, hour: 17, minute: 45, second: 50)
+	UtcTime.from_time(now)!
+}
+
 fn test_serialize_utctime_error_without_z() ! {
 	// this input does not contains zulu 'Z' part
 	inp := '191215190210'
@@ -115,3 +128,15 @@ fn test_create_generalizedtime_from_std_time() ! {
 
 	assert g_utc_back.value == s
 }
+
+fn test_create_generalizedtime_from_std_time_with_negative_offset() ! {
+	tz := os.getenv('TZ')
+	os.setenv('TZ', 'utc 1', true)
+
+	defer {
+		os.setenv('TZ', tz, true)
+	}
+
+	now := time.new(year: 2024, month: 11, day: 13, hour: 17, minute: 45, second: 50)
+	GeneralizedTime.from_time(now)!
+}