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package model.pki.cert;
import model.asn1.*;
import model.asn1.exceptions.ParseException;
import model.asn1.parsing.BytesReader;
import model.TestConstants;
import org.junit.jupiter.api.Test;
import java.math.BigInteger;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.util.Arrays;
import static model.TestConstants.mutate;
import static org.junit.jupiter.api.Assertions.*;
public class TbsCertificateTest {
@Test
void testConstructor() {
assertEquals(TbsCertificate.VERSION_V3, TestConstants.CERT_GENERATED.getVersion().getLong());
assertEquals(100, TestConstants.CERT_GENERATED.getSerialNumber().getLong());
assertArrayEquals(ObjectIdentifier.OID_RSA_ENCRYPTION, TestConstants.CERT_GENERATED.getSignature().getType().getInts());
assertEquals("CN=Test CA,C=CA", TestConstants.CERT_GENERATED.getIssuer().toString());
assertEquals(TestConstants.NOW, TestConstants.CERT_GENERATED.getValidity().getNotBefore().getTimestamp());
assertEquals(TestConstants.NOW.plusYears(1),
TestConstants.CERT_GENERATED.getValidity().getNotAfter().getTimestamp());
assertEquals("CN=Yuuta Liang,C=CA", TestConstants.CERT_GENERATED.getSubject().toString());
assertArrayEquals(ObjectIdentifier.OID_EC_PUBLIC_KEY,
TestConstants.CERT_GENERATED.getSubjectPublicKeyInfo().getAlgorithm().getType().getInts());
assertEquals(2, TestConstants.CERT_GENERATED.getExtensions().getExtensions().length);
assertArrayEquals(ObjectIdentifier.OID_BASIC_CONSTRAINTS,
TestConstants.CERT_GENERATED.getExtensions().getExtensions()[0].getExtnId().getInts());
assertArrayEquals(ObjectIdentifier.OID_KEY_USAGE,
TestConstants.CERT_GENERATED.getExtensions().getExtensions()[1].getExtnId().getInts());
}
@Test
void testParse() throws ParseException {
TbsCertificate parsed = new TbsCertificate(new BytesReader(trimToTbs(TestConstants.CERT_L1_ECC)),
false);
assertEquals(TbsCertificate.VERSION_V3, parsed.getVersion().getLong());
assertEquals(0, parsed.getSerialNumber().getValue()
.compareTo(new BigInteger("644983544608556543477205958886697401602227090424")));
assertArrayEquals(ObjectIdentifier.OID_ECDSA_WITH_SHA256,
parsed.getSignature().getType().getInts());
assertNull(parsed.getSignature().getParameters());
assertEquals("CN=Yuuta Root CA,C=CA", parsed.getIssuer().toString());
assertEquals(ZonedDateTime.of(2023, 6, 23,
2, 50, 46, 0, ZoneId.of("UTC")),
parsed.getValidity().getNotBefore().getTimestamp());
assertEquals(ZonedDateTime.of(2048, 6, 23,
2, 50, 46, 0, ZoneId.of("UTC")),
parsed.getValidity().getNotAfter().getTimestamp());
assertEquals("CN=Yuuta Root CA,C=CA", parsed.getSubject().toString());
assertArrayEquals(ObjectIdentifier.OID_EC_PUBLIC_KEY,
parsed.getSubjectPublicKeyInfo().getAlgorithm().getType().getInts());
assertArrayEquals(ObjectIdentifier.OID_PRIME256_V1,
((ObjectIdentifier) parsed.getSubjectPublicKeyInfo().getAlgorithm().getParameters()).getInts());
assertEquals(4, parsed.getExtensions().getExtensions().length);
assertArrayEquals(ObjectIdentifier.OID_SUBJECT_KEY_IDENTIFIER,
parsed.getExtensions().getExtensions()[0].getExtnId().getInts());
assertArrayEquals(ObjectIdentifier.OID_AUTHORITY_KEY_IDENTIFIER,
parsed.getExtensions().getExtensions()[1].getExtnId().getInts());
assertArrayEquals(ObjectIdentifier.OID_BASIC_CONSTRAINTS,
parsed.getExtensions().getExtensions()[2].getExtnId().getInts());
assertArrayEquals(ObjectIdentifier.OID_KEY_USAGE,
parsed.getExtensions().getExtensions()[3].getExtnId().getInts());
parsed = new TbsCertificate(
new BytesReader(trimToTbs(TestConstants.CERT_L2_RSA)),
false);
assertEquals(TbsCertificate.VERSION_V3, parsed.getVersion().getLong());
assertEquals(0, parsed.getSerialNumber().getValue()
.compareTo(new BigInteger("354327098948136693059815576591331472151989570311")));
assertArrayEquals(ObjectIdentifier.OID_ECDSA_WITH_SHA512,
parsed.getSignature().getType().getInts());
assertNull(parsed.getSignature().getParameters());
assertEquals("CN=Yuuta Root CA,C=CA", parsed.getIssuer().toString());
assertEquals(ZonedDateTime.of(2023, 6, 24,
0, 15, 22, 0, ZoneId.of("UTC")),
parsed.getValidity().getNotBefore().getTimestamp());
assertEquals(ZonedDateTime.of(2033, 6, 21,
0, 15, 22, 0, ZoneId.of("UTC")),
parsed.getValidity().getNotAfter().getTimestamp());
assertEquals("DC=MOE,DC=YUUTA,DC=AD,CN=Yuuta Home Issuing CA", parsed.getSubject().toString());
assertArrayEquals(ObjectIdentifier.OID_RSA_ENCRYPTION,
parsed.getSubjectPublicKeyInfo().getAlgorithm().getType().getInts());
assertEquals(Null.TAG.getNumber(),
parsed.getSubjectPublicKeyInfo().getAlgorithm().getParameters().getTag().getNumber());
assertEquals(526, parsed.getSubjectPublicKeyInfo().getSubjectPublicKey().getVal().length);
assertEquals(6, parsed.getExtensions().getExtensions().length);
assertArrayEquals(ObjectIdentifier.OID_SUBJECT_KEY_IDENTIFIER,
parsed.getExtensions().getExtensions()[0].getExtnId().getInts());
assertArrayEquals(ObjectIdentifier.OID_AUTHORITY_KEY_IDENTIFIER,
parsed.getExtensions().getExtensions()[1].getExtnId().getInts());
assertArrayEquals(ObjectIdentifier.OID_BASIC_CONSTRAINTS,
parsed.getExtensions().getExtensions()[2].getExtnId().getInts());
assertArrayEquals(ObjectIdentifier.OID_KEY_USAGE,
parsed.getExtensions().getExtensions()[3].getExtnId().getInts());
assertArrayEquals(ObjectIdentifier.OID_CRL_DISTRIBUTION_POINTS,
parsed.getExtensions().getExtensions()[4].getExtnId().getInts());
assertArrayEquals(ObjectIdentifier.OID_AUTHORITY_INFO_ACCESS,
parsed.getExtensions().getExtensions()[5].getExtnId().getInts());
parsed = new TbsCertificate(
new BytesReader(Arrays.stream(TestConstants.CERT_V1).skip(4).toArray(Byte[]::new)),
false);
assertNull(parsed.getVersion());
assertNull(parsed.getExtensions());
}
@Test
void testParseFail() throws ParseException {
final Byte[] in = trimToTbs(TestConstants.CERT_L2_RSA);
// Wrong version parent tag
assertThrows(ParseException.class, () ->
new TbsCertificate(new BytesReader(mutate(in, 4, -96, 2)), false));
// Wrong version inner tag
assertThrows(ParseException.class, () ->
new TbsCertificate(new BytesReader(mutate(in, 6, 0x2, 3)), false));
// Wrong serial number tag
assertThrows(ParseException.class, () ->
new TbsCertificate(new BytesReader(mutate(in, 9, 0x2, 3)), false));
// Wrong signature tag
assertThrows(ParseException.class, () ->
new TbsCertificate(new BytesReader(mutate(in, 31, 0x30, 3)), false));
// Wrong issuer tag
assertThrows(ParseException.class, () ->
new TbsCertificate(new BytesReader(mutate(in, 43, 0x30, 0x31)), false));
// Wrong validity tag
assertThrows(ParseException.class, () ->
new TbsCertificate(new BytesReader(mutate(in, 82, 0x30, 0x31)), false));
// Wrong subject tag
assertThrows(ParseException.class, () ->
new TbsCertificate(new BytesReader(mutate(in, 114, 0x30, 0x31)), false));
// Wrong subject public key info tag
assertThrows(ParseException.class, () ->
new TbsCertificate(new BytesReader(mutate(in, 212, 0x30, 0x31)), false));
// Wrong extensions parent tag
assertThrows(ParseException.class, () ->
new TbsCertificate(new BytesReader(mutate(in, 762, -93, 0x31)), false));
// Wrong extensions inner tag
assertThrows(ParseException.class, () ->
new TbsCertificate(new BytesReader(mutate(in, 765, 0x30, 0x31)), false));
// Extensions exist, but wrong version
assertThrows(ParseException.class, () ->
new TbsCertificate(new BytesReader(mutate(in, 8, 0x2, TbsCertificate.VERSION_V2)),
false));
// Totally wrong version
assertThrows(ParseException.class, () ->
new TbsCertificate(new BytesReader(mutate(in, 8, 0x2, TbsCertificate.VERSION_V3 + 1)),
false));
// Extensions exist, but no version
final TbsCertificate certV1 = new TbsCertificate(new BytesReader(trimToTbs(TestConstants.CERT_V1)), false);
final TbsCertificate certV3 = new TbsCertificate(new BytesReader(trimToTbs(TestConstants.CERT_L2_RSA)), false);
Byte[] wrongCert = new TbsCertificate(ASN1Object.TAG_SEQUENCE, null,
null,
certV1.getSerialNumber(),
certV1.getSignature(),
certV1.getIssuer(),
certV1.getValidity(),
certV1.getSubject(),
certV1.getSubjectPublicKeyInfo(),
certV3.getExtensions())
.encodeDER();
assertThrows(ParseException.class, () ->
new TbsCertificate(new BytesReader(wrongCert), false));
}
@Test
void testEncode() throws ParseException {
Byte[] in = trimToTbs(TestConstants.CERT_L1_ECC);
assertArrayEquals(Arrays.copyOfRange(in, 0, 345), new TbsCertificate(new BytesReader(in), false).encodeDER());
in = trimToTbs(TestConstants.CERT_L2_RSA);
assertArrayEquals(Arrays.copyOfRange(in, 0, 989), new TbsCertificate(new BytesReader(in), false).encodeDER());
in = trimToTbs(TestConstants.CERT_V1);
assertArrayEquals(Arrays.copyOfRange(in, 0, 583), new TbsCertificate(new BytesReader(in), false).encodeDER());
}
private static Byte[] trimToTbs(Byte[] in) {
return Arrays.stream(in).skip(4).toArray(Byte[]::new);
}
}
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