Add SignatureSubpacket enum

pgpainless-core/src/main/java/org/pgpainless/algorithm/SignatureSubpacket.java

@@ -0,0 +1,115 @@
+/*
+ * Copyright 2021 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.pgpainless.algorithm;
+
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.ATTESTED_CERTIFICATIONS;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.CREATION_TIME;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.EMBEDDED_SIGNATURE;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.EXPIRE_TIME;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.EXPORTABLE;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.FEATURES;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.INTENDED_RECIPIENT_FINGERPRINT;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.ISSUER_FINGERPRINT;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.ISSUER_KEY_ID;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.KEY_EXPIRE_TIME;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.KEY_FLAGS;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.KEY_SERVER_PREFS;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.NOTATION_DATA;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.PLACEHOLDER;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.POLICY_URL;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.PREFERRED_AEAD_ALGORITHMS;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.PREFERRED_COMP_ALGS;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.PREFERRED_HASH_ALGS;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.PREFERRED_KEY_SERV;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.PREFERRED_SYM_ALGS;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.PRIMARY_USER_ID;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.REG_EXP;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.REVOCABLE;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.REVOCATION_KEY;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.REVOCATION_REASON;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.SIGNATURE_TARGET;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.SIGNER_USER_ID;
+import static org.bouncycastle.bcpg.SignatureSubpacketTags.TRUST_SIG;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+public enum SignatureSubpacket {
+    signatureCreationTime(CREATION_TIME),
+    signatureExpirationTime(EXPIRE_TIME),
+    exportableCertification(EXPORTABLE),
+    trustSignature(TRUST_SIG),
+    regularExpression(REG_EXP),
+    revocable(REVOCABLE),
+    keyExpirationTime(KEY_EXPIRE_TIME),
+    placeholder(PLACEHOLDER),
+    preferredSymmetricAlgorithms(PREFERRED_SYM_ALGS),
+    revocationKey(REVOCATION_KEY),
+    issuerKeyId(ISSUER_KEY_ID),
+    notationData(NOTATION_DATA),
+    preferredHashAlgorithms(PREFERRED_HASH_ALGS),
+    preferredCompressionAlgorithms(PREFERRED_COMP_ALGS),
+    keyServerPreferences(KEY_SERVER_PREFS),
+    preferredKeyServers(PREFERRED_KEY_SERV),
+    primaryUserId(PRIMARY_USER_ID),
+    policyUrl(POLICY_URL),
+    keyFlags(KEY_FLAGS),
+    signerUserId(SIGNER_USER_ID),
+    revocationReason(REVOCATION_REASON),
+    features(FEATURES),
+    signatureTarget(SIGNATURE_TARGET),
+    embeddedSignature(EMBEDDED_SIGNATURE),
+    issuerFingerprint(ISSUER_FINGERPRINT),
+    preferredAEADAlgorithms(PREFERRED_AEAD_ALGORITHMS),
+    intendedRecipientFingerprint(INTENDED_RECIPIENT_FINGERPRINT),
+    attestedCertification(ATTESTED_CERTIFICATIONS)
+    ;
+
+    private static final Map<Integer, SignatureSubpacket> MAP = new ConcurrentHashMap<>();
+    static {
+        for (SignatureSubpacket p : values()) {
+            MAP.put(p.code, p);
+        }
+    }
+
+    private final int code;
+
+    SignatureSubpacket(int code) {
+        this.code = code;
+    }
+
+    public int getCode() {
+        return code;
+    }
+
+    public static SignatureSubpacket fromCode(int code) {
+        SignatureSubpacket tag = MAP.get(code);
+        if (tag == null) {
+            throw new IllegalArgumentException("No SignatureSubpacket tag found with code " + code);
+        }
+        return tag;
+    }
+
+    public static List<SignatureSubpacket> fromCodes(int[] codes) {
+        List<SignatureSubpacket> tags = new ArrayList<>();
+        for (int code : codes) {
+            tags.add(fromCode(code));
+        }
+        return tags;
+    }
+}