Update libsignal-service

[signal-cli] / lib / src / main / java / org / asamk / signal / manager / util / KeyUtils.java

diff --git a/lib/src/main/java/org/asamk/signal/manager/util/KeyUtils.java b/lib/src/main/java/org/asamk/signal/manager/util/KeyUtils.java
index d87868eedf754b7f3aa0eb4438ff68424019f99c..21c8aa960b76d1d13344f3225c617b4f948d61cd 100644 (file)
--- a/lib/src/main/java/org/asamk/signal/manager/util/KeyUtils.java
+++ b/lib/src/main/java/org/asamk/signal/manager/util/KeyUtils.java
@@ -1,15 +1,20 @@
 package org.asamk.signal.manager.util;
 
+import org.asamk.signal.manager.storage.SignalAccount;
 import org.signal.libsignal.protocol.IdentityKey;
 import org.signal.libsignal.protocol.IdentityKeyPair;
 import org.signal.libsignal.protocol.InvalidKeyException;
 import org.signal.libsignal.protocol.ecc.Curve;
 import org.signal.libsignal.protocol.ecc.ECPrivateKey;
+import org.signal.libsignal.protocol.kem.KEMKeyPair;
+import org.signal.libsignal.protocol.kem.KEMKeyType;
+import org.signal.libsignal.protocol.state.KyberPreKeyRecord;
 import org.signal.libsignal.protocol.state.PreKeyRecord;
 import org.signal.libsignal.protocol.state.SignedPreKeyRecord;
-import org.signal.libsignal.protocol.util.Medium;
 import org.signal.libsignal.zkgroup.InvalidInputException;
 import org.signal.libsignal.zkgroup.profiles.ProfileKey;
+import org.whispersystems.signalservice.api.account.PreKeyCollection;
+import org.whispersystems.signalservice.api.backup.MediaRootBackupKey;
 import org.whispersystems.signalservice.api.kbs.MasterKey;
 
 import java.security.SecureRandom;
@@ -17,6 +22,9 @@ import java.util.ArrayList;
 import java.util.Base64;
 import java.util.List;
 
+import static org.asamk.signal.manager.config.ServiceConfig.PREKEY_BATCH_SIZE;
+import static org.asamk.signal.manager.config.ServiceConfig.PREKEY_MAXIMUM_ID;
+
 public class KeyUtils {
 
     private static final SecureRandom secureRandom = new SecureRandom();
@@ -43,10 +51,10 @@ public class KeyUtils {
         return new IdentityKeyPair(djbIdentityKey, djbPrivateKey);
     }
 
-    public static List<PreKeyRecord> generatePreKeyRecords(final int offset, final int batchSize) {
-        var records = new ArrayList<PreKeyRecord>(batchSize);
-        for (var i = 0; i < batchSize; i++) {
-            var preKeyId = (offset + i) % Medium.MAX_VALUE;
+    public static List<PreKeyRecord> generatePreKeyRecords(final int offset) {
+        var records = new ArrayList<PreKeyRecord>(PREKEY_BATCH_SIZE);
+        for (var i = 0; i < PREKEY_BATCH_SIZE; i++) {
+            var preKeyId = (offset + i) % PREKEY_MAXIMUM_ID;
             var keyPair = Curve.generateKeyPair();
             var record = new PreKeyRecord(preKeyId, keyPair);
 
@@ -56,18 +64,35 @@ public class KeyUtils {
     }
 
     public static SignedPreKeyRecord generateSignedPreKeyRecord(
-            final IdentityKeyPair identityKeyPair, final int signedPreKeyId
+            final int signedPreKeyId,
+            final ECPrivateKey privateKey
     ) {
         var keyPair = Curve.generateKeyPair();
         byte[] signature;
         try {
-            signature = Curve.calculateSignature(identityKeyPair.getPrivateKey(), keyPair.getPublicKey().serialize());
+            signature = Curve.calculateSignature(privateKey, keyPair.getPublicKey().serialize());
         } catch (InvalidKeyException e) {
             throw new AssertionError(e);
         }
         return new SignedPreKeyRecord(signedPreKeyId, System.currentTimeMillis(), keyPair, signature);
     }
 
+    public static List<KyberPreKeyRecord> generateKyberPreKeyRecords(final int offset, final ECPrivateKey privateKey) {
+        var records = new ArrayList<KyberPreKeyRecord>(PREKEY_BATCH_SIZE);
+        for (var i = 0; i < PREKEY_BATCH_SIZE; i++) {
+            var preKeyId = (offset + i) % PREKEY_MAXIMUM_ID;
+            records.add(generateKyberPreKeyRecord(preKeyId, privateKey));
+        }
+        return records;
+    }
+
+    public static KyberPreKeyRecord generateKyberPreKeyRecord(final int preKeyId, final ECPrivateKey privateKey) {
+        KEMKeyPair keyPair = KEMKeyPair.generate(KEMKeyType.KYBER_1024);
+        byte[] signature = privateKey.calculateSignature(keyPair.getPublicKey().serialize());
+
+        return new KyberPreKeyRecord(preKeyId, System.currentTimeMillis(), keyPair, signature);
+    }
+
     public static ProfileKey createProfileKey() {
         try {
             return new ProfileKey(getSecretBytes(32));
@@ -88,6 +113,14 @@ public class KeyUtils {
         return MasterKey.createNew(secureRandom);
     }
 
+    public static MediaRootBackupKey createMediaRootBackupKey() {
+        return new MediaRootBackupKey(getSecretBytes(32));
+    }
+
+    public static byte[] createRawStorageId() {
+        return getSecretBytes(16);
+    }
+
     private static String getSecret(int size) {
         var secret = getSecretBytes(size);
         return Base64.getEncoder().encodeToString(secret);
@@ -98,4 +131,22 @@ public class KeyUtils {
         secureRandom.nextBytes(secret);
         return secret;
     }
+
+    public static int getRandomInt(int bound) {
+        return secureRandom.nextInt(bound);
+    }
+
+    public static PreKeyCollection generatePreKeysForType(final SignalAccount.AccountData<?> accountData) {
+        final var keyPair = accountData.getIdentityKeyPair();
+        final var preKeyMetadata = accountData.getPreKeyMetadata();
+
+        final var nextSignedPreKeyId = preKeyMetadata.getNextSignedPreKeyId();
+        final var signedPreKey = generateSignedPreKeyRecord(nextSignedPreKeyId, keyPair.getPrivateKey());
+
+        final var privateKey = keyPair.getPrivateKey();
+        final var kyberPreKeyIdOffset = preKeyMetadata.getNextKyberPreKeyId();
+        final var lastResortKyberPreKey = generateKyberPreKeyRecord(kyberPreKeyIdOffset, privateKey);
+
+        return new PreKeyCollection(keyPair.getPublicKey(), signedPreKey, lastResortKyberPreKey);
+    }
 }