nmode's Git Repositories - signal-cli/blob - src/main/java/org/asamk/signal/storage/protocol/JsonSignedPreKeyStore.java

   1 package org.asamk.signal.storage.protocol;
   2
   3 import com.fasterxml.jackson.core.JsonGenerator;
   4 import com.fasterxml.jackson.core.JsonParser;
   5 import com.fasterxml.jackson.databind.DeserializationContext;
   6 import com.fasterxml.jackson.databind.JsonDeserializer;
   7 import com.fasterxml.jackson.databind.JsonNode;
   8 import com.fasterxml.jackson.databind.JsonSerializer;
   9 import com.fasterxml.jackson.databind.SerializerProvider;
  10
  11 import org.whispersystems.libsignal.InvalidKeyIdException;
  12 import org.whispersystems.libsignal.state.SignedPreKeyRecord;
  13 import org.whispersystems.libsignal.state.SignedPreKeyStore;
  14 import org.whispersystems.util.Base64;
  15
  16 import java.io.IOException;
  17 import java.util.HashMap;
  18 import java.util.LinkedList;
  19 import java.util.List;
  20 import java.util.Map;
  21
  22 class JsonSignedPreKeyStore implements SignedPreKeyStore {
  23
  24     private final Map<Integer, byte[]> store = new HashMap<>();
  25
  26     public JsonSignedPreKeyStore() {
  27
  28     }
  29
  30     private void addSignedPreKeys(Map<Integer, byte[]> preKeys) {
  31         store.putAll(preKeys);
  32     }
  33
  34     @Override
  35     public SignedPreKeyRecord loadSignedPreKey(int signedPreKeyId) throws InvalidKeyIdException {
  36         try {
  37             if (!store.containsKey(signedPreKeyId)) {
  38                 throw new InvalidKeyIdException("No such signedprekeyrecord! " + signedPreKeyId);
  39             }
  40
  41             return new SignedPreKeyRecord(store.get(signedPreKeyId));
  42         } catch (IOException e) {
  43             throw new AssertionError(e);
  44         }
  45     }
  46
  47     @Override
  48     public List<SignedPreKeyRecord> loadSignedPreKeys() {
  49         try {
  50             List<SignedPreKeyRecord> results = new LinkedList<>();
  51
  52             for (byte[] serialized : store.values()) {
  53                 results.add(new SignedPreKeyRecord(serialized));
  54             }
  55
  56             return results;
  57         } catch (IOException e) {
  58             throw new AssertionError(e);
  59         }
  60     }
  61
  62     @Override
  63     public void storeSignedPreKey(int signedPreKeyId, SignedPreKeyRecord record) {
  64         store.put(signedPreKeyId, record.serialize());
  65     }
  66
  67     @Override
  68     public boolean containsSignedPreKey(int signedPreKeyId) {
  69         return store.containsKey(signedPreKeyId);
  70     }
  71
  72     @Override
  73     public void removeSignedPreKey(int signedPreKeyId) {
  74         store.remove(signedPreKeyId);
  75     }
  76
  77     public static class JsonSignedPreKeyStoreDeserializer extends JsonDeserializer<JsonSignedPreKeyStore> {
  78
  79         @Override
  80         public JsonSignedPreKeyStore deserialize(
  81                 JsonParser jsonParser, DeserializationContext deserializationContext
  82         ) throws IOException {
  83             JsonNode node = jsonParser.getCodec().readTree(jsonParser);
  84
  85             Map<Integer, byte[]> preKeyMap = new HashMap<>();
  86             if (node.isArray()) {
  87                 for (JsonNode preKey : node) {
  88                     Integer preKeyId = preKey.get("id").asInt();
  89                     try {
  90                         preKeyMap.put(preKeyId, Base64.decode(preKey.get("record").asText()));
  91                     } catch (IOException e) {
  92                         System.err.println(String.format("Error while decoding prekey for: %s", preKeyId));
  93                     }
  94                 }
  95             }
  96
  97             JsonSignedPreKeyStore keyStore = new JsonSignedPreKeyStore();
  98             keyStore.addSignedPreKeys(preKeyMap);
  99
 100             return keyStore;
 101
 102         }
 103     }
 104
 105     public static class JsonSignedPreKeyStoreSerializer extends JsonSerializer<JsonSignedPreKeyStore> {
 106
 107         @Override
 108         public void serialize(
 109                 JsonSignedPreKeyStore jsonPreKeyStore, JsonGenerator json, SerializerProvider serializerProvider
 110         ) throws IOException {
 111             json.writeStartArray();
 112             for (Map.Entry<Integer, byte[]> signedPreKey : jsonPreKeyStore.store.entrySet()) {
 113                 json.writeStartObject();
 114                 json.writeNumberField("id", signedPreKey.getKey());
 115                 json.writeStringField("record", Base64.encodeBytes(signedPreKey.getValue()));
 116                 json.writeEndObject();
 117             }
 118             json.writeEndArray();
 119         }
 120     }
 121 }