From d342a45d98c4795b3a3fe1aaef5236ad4a782b55 Mon Sep 17 00:00:00 2001
From: Yuuta Liang <yuutaw@students.cs.ubc.ca>
Date: Thu, 12 Oct 2023 12:10:33 +0800
Subject: 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>
---
 src/main/model/pki/crl/CertificateListContent.java | 106 +++++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 src/main/model/pki/crl/CertificateListContent.java

(limited to 'src/main/model/pki/crl/CertificateListContent.java')

diff --git a/src/main/model/pki/crl/CertificateListContent.java b/src/main/model/pki/crl/CertificateListContent.java
new file mode 100644
index 0000000..6f75d71
--- /dev/null
+++ b/src/main/model/pki/crl/CertificateListContent.java
@@ -0,0 +1,106 @@
+package model.pki.crl;
+
+import model.asn1.*;
+import model.pki.AlgorithmIdentifier;
+import model.x501.Name;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+/**
+ * Represents a CRL content:
+ *
+ * <pre>
+ *     CertificateListContent ::= SEQUENCE {
+ *      version Version OPTIONAL,
+ *      -- if present, version shall be v2
+ *      signature AlgorithmIdentifier{{SupportedAlgorithms}},
+ *      issuer Name,
+ *      thisUpdate Time,
+ *      nextUpdate Time OPTIONAL,
+ *      revokedCertificates SEQUENCE OF SEQUENCE {
+ *        serialNumber CertificateSerialNumber,
+ *        revocationDate Time,
+ *        crlEntryExtensions Extensions OPTIONAL,
+ *        ...} OPTIONAL,
+ *      ...,
+ *      ...,
+ *      crlExtensions [0] Extensions OPTIONAL }
+ * </pre>
+ *
+ * A CRL is a signed object published by the CA that revokes any certificates signed by this CA before their
+ * expiration. Relying-parties should check the CRL from corresponding CDPs to see if the certificate to check is
+ * already revoked.
+ * Because the CA will only generate CRLs, this object won't be parsed.
+ */
+public class CertificateListContent extends ASN1Object {
+    private final Int version = new Int(Int.TAG, null, 1);
+    private final Name issuer;
+    private final AlgorithmIdentifier signature;
+    private final ASN1Time thisUpdate;
+    private final ASN1Time nextUpdate;
+    private final RevokedCertificate[] revokedCertificates;
+
+    /**
+     * EFFECTS: Init with tags and the given parameters. Version is always set to 1.
+     * REQUIRES: except for nextUpdate, all other fields are non-null; items in revokedCerts should be SEQUENCE.
+     */
+    public CertificateListContent(Tag tag, Tag parentTag,
+                                  Name issuer,
+                                  AlgorithmIdentifier signature,
+                                  ASN1Time thisUpdate,
+                                  ASN1Time nextUpdate,
+                                  RevokedCertificate[] revokedCertificates) {
+        super(tag, parentTag);
+        this.issuer = issuer;
+        this.signature = signature;
+        this.thisUpdate = thisUpdate;
+        this.nextUpdate = nextUpdate;
+        this.revokedCertificates = revokedCertificates;
+    }
+
+    @Override
+    public Byte[] encodeValueDER() {
+        final List<Byte> itemsEncoded = Arrays.stream(revokedCertificates)
+                .map(Encodable::encodeDER)
+                .flatMap(Arrays::stream)
+                .collect(Collectors.toList());
+        return Stream.of(Arrays.asList(version.encodeDER()),
+                Arrays.asList(issuer.encodeDER()),
+                Arrays.asList(signature.encodeDER()),
+                Arrays.asList(thisUpdate.encodeDER()),
+                nextUpdate == null ? Collections.<Byte>emptyList() : Arrays.asList(nextUpdate.encodeDER()),
+                Arrays.asList(new Tag(TagClass.UNIVERSAL, true, 0x30).encodeDER()),
+                Arrays.asList(new ASN1Length(itemsEncoded.size()).encodeDER()), itemsEncoded)
+                .flatMap(Collection::stream)
+                .toArray(Byte[]::new);
+    }
+
+    public Int getVersion() {
+        return version;
+    }
+
+    public Name getIssuer() {
+        return issuer;
+    }
+
+    public AlgorithmIdentifier getSignature() {
+        return signature;
+    }
+
+    public ASN1Time getThisUpdate() {
+        return thisUpdate;
+    }
+
+    public ASN1Time getNextUpdate() {
+        return nextUpdate;
+    }
+
+    public RevokedCertificate[] getRevokedCertificates() {
+        return revokedCertificates;
+    }
+}
-- 
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