Implement data structures from X.680, X.501, X.509, and PKCS#10, with X.690 encoding / decoding support

The implementation took four days, and it is still a little bit rough. Updated version should arrive soon.

Signed-off-by: Yuuta Liang <yuutaw@students.cs.ubc.ca>

1 files changed, 121 insertions, 0 deletions

diff --git a/src/test/model/asn1/UtcTimeTest.java b/src/test/model/asn1/UtcTimeTest.java
new file mode 100644
index 0000000..5ba7e13
--- /dev/null
+++ b/src/test/model/asn1/UtcTimeTest.java
@@ -0,0 +1,121 @@
+package model.asn1;
+
+import model.asn1.exceptions.ParseException;
+import model.asn1.parsing.BytesReader;
+import org.junit.jupiter.api.Test;
+
+import java.time.ZoneId;
+import java.time.ZonedDateTime;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class UtcTimeTest {
+    @Test
+    void testConstructor() throws ParseException {
+        final ZonedDateTime now = ZonedDateTime.now();
+        assertEquals(now, new UtcTime(UtcTime.TAG, null, now).getTimestamp());
+
+        final ASN1Time parsed = new UtcTime(new BytesReader(new Byte[] {
+                0x17, 13,
+                '1', '9', '0', '8', '1', '0', '1', '1', '4', '5', '1', '4', 'Z'
+        }), false);
+        assertEquals("190810114514Z",
+                parsed.toString());
+        assertEquals(ZonedDateTime.of(2019, 8, 10, 11, 45, 14,
+                0, ZoneId.of("UTC")),
+                parsed.getTimestamp());
+    }
+
+    @Test
+    void testParse() throws ParseException {
+        ASN1Time parsed = new UtcTime(new BytesReader(new Byte[] {
+                0x17, 13,
+                '2', '3', '0', '9', '2', '7', '1', '1', '4', '5', '1', '4', 'Z'
+        }), false);
+
+        assertEquals(ZonedDateTime.of(2023, 9, 27, 11, 45, 14,
+                        0, ZoneId.of("UTC")),
+                parsed.getTimestamp());
+
+        // No seconds
+        parsed = new UtcTime(new BytesReader(new Byte[] {
+                0x17, 11,
+                '2', '3', '0', '9', '2', '7', '1', '1', '4', '5', 'Z'
+        }), false);
+        assertEquals(ZonedDateTime.of(2023, 9, 27, 11, 45, 0,
+                        0, ZoneId.of("UTC")),
+                parsed.getTimestamp());
+
+        // Length 0
+        assertThrows(ParseException.class, () ->
+                new UtcTime(new BytesReader(new Byte[]{
+                        0x17, 0
+                }), false));
+        // Early EOF
+        assertThrows(ParseException.class, () ->
+                new UtcTime(new BytesReader(new Byte[]{
+                        0x17, 13
+                }), false));
+        // No tailing Z
+        assertThrows(ParseException.class, () ->
+                new UtcTime(new BytesReader(new Byte[]{
+                        0x17, 12,
+                        '2', '3', '0', '9', '2', '7', '1', '1', '4', '5', '1', '4'
+                }), false));
+        // Custom timezone
+        assertThrows(ParseException.class, () ->
+                new UtcTime(new BytesReader(new Byte[]{
+                        0x17, 18,
+                        '2', '0', '2', '3', '0', '9', '2', '7', '1', '1', '4', '5', '1', '4', 'Z', '-', '0', '8'
+                }), false));
+        // Invalid month / day / hour / minute / second
+        assertThrows(ParseException.class, () ->
+                new UtcTime(new BytesReader(new Byte[]{
+                        0x17, 13,
+                        '2', '3', '1', '3', '2', '7', '1', '1', '4', '5', '1', '4', 'Z'
+                }), false));
+        assertThrows(ParseException.class, () ->
+                new UtcTime(new BytesReader(new Byte[]{
+                        0x17, 13,
+                        '2', '3', '1', '0', '3', '2', '1', '1', '4', '5', '1', '4', 'Z'
+                }), false));
+        assertThrows(ParseException.class, () ->
+                new UtcTime(new BytesReader(new Byte[]{
+                        0x17, 13,
+                        '2', '3', '1', '0', '3', '0', '2', '5', '4', '5', '1', '4', 'Z'
+                }), false));
+        assertThrows(ParseException.class, () ->
+                new UtcTime(new BytesReader(new Byte[]{
+                        0x17, 13,
+                        '2', '3', '1', '0', '3', '0', '2', '4', '6', '1', '1', '4', 'Z'
+                }), false));
+        assertThrows(ParseException.class, () ->
+                new UtcTime(new BytesReader(new Byte[]{
+                        0x17, 13,
+                        '2', '3', '1', '0', '3', '0', '2', '4', '6', '0', '6', '1', 'Z'
+                }), false));
+    }
+
+    @Test
+    void testEncode() throws ParseException {
+        assertEquals("230927114514Z", new UtcTime(new BytesReader(new Byte[] {
+                -95, 15,
+                0x17, 13,
+                '2', '3', '0', '9', '2', '7', '1', '1', '4', '5', '1', '4', 'Z'
+        }), true).toString());
+        // No seconds
+        assertEquals("2309271145Z", new UtcTime(new BytesReader(new Byte[] {
+                -95, 13,
+                0x17, 11,
+                '2', '3', '0', '9', '2', '7', '1', '1', '4', '5', 'Z'
+        }), true).toString());
+
+        // To byte array
+        assertArrayEquals(new Byte[] {
+                0x17, 11,
+                '2', '3', '0', '9', '2', '7', '1', '1', '4', '5', 'Z'
+        }, new UtcTime(UtcTime.TAG, null, ZonedDateTime.of(2023, 9,
+                27, 11, 45, 0, 0, ZoneId.of("UTC")))
+                .encodeDER());
+    }
+}