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

   1 package org.asamk.signal;
   2
   3 import com.fasterxml.jackson.core.JsonGenerator;
   4 import com.fasterxml.jackson.core.JsonParser;
   5 import com.fasterxml.jackson.core.JsonProcessingException;
   6 import com.fasterxml.jackson.databind.*;
   7 import org.whispersystems.libsignal.IdentityKey;
   8 import org.whispersystems.libsignal.IdentityKeyPair;
   9 import org.whispersystems.libsignal.InvalidKeyException;
  10 import org.whispersystems.libsignal.SignalProtocolAddress;
  11 import org.whispersystems.libsignal.state.IdentityKeyStore;
  12
  13 import java.io.IOException;
  14 import java.util.*;
  15
  16 class JsonIdentityKeyStore implements IdentityKeyStore {
  17
  18     private final Map<String, List<Identity>> trustedKeys = new HashMap<>();
  19
  20     private final IdentityKeyPair identityKeyPair;
  21     private final int localRegistrationId;
  22
  23
  24     public JsonIdentityKeyStore(IdentityKeyPair identityKeyPair, int localRegistrationId) {
  25         this.identityKeyPair = identityKeyPair;
  26         this.localRegistrationId = localRegistrationId;
  27     }
  28
  29     @Override
  30     public IdentityKeyPair getIdentityKeyPair() {
  31         return identityKeyPair;
  32     }
  33
  34     @Override
  35     public int getLocalRegistrationId() {
  36         return localRegistrationId;
  37     }
  38
  39     @Override
  40     public void saveIdentity(SignalProtocolAddress address, IdentityKey identityKey) {
  41         saveIdentity(address.getName(), identityKey, TrustLevel.TRUSTED_UNVERIFIED, null);
  42     }
  43
  44     /**
  45      * Adds or updates the given identityKey for the user name and sets the trustLevel and added timestamp.
  46      *
  47      * @param name        User name, i.e. phone number
  48      * @param identityKey The user's public key
  49      * @param trustLevel
  50      * @param added       Added timestamp, if null and the key is newly added, the current time is used.
  51      */
  52     public void saveIdentity(String name, IdentityKey identityKey, TrustLevel trustLevel, Date added) {
  53         List<Identity> identities = trustedKeys.get(name);
  54         if (identities == null) {
  55             identities = new ArrayList<>();
  56             trustedKeys.put(name, identities);
  57         } else {
  58             for (Identity id : identities) {
  59                 if (!id.identityKey.equals(identityKey))
  60                     continue;
  61
  62                 if (id.trustLevel.compareTo(trustLevel) < 0) {
  63                     id.trustLevel = trustLevel;
  64                 }
  65                 if (added != null) {
  66                     id.added = added;
  67                 }
  68                 return;
  69             }
  70         }
  71         identities.add(new Identity(identityKey, trustLevel, added != null ? added : new Date()));
  72     }
  73
  74     @Override
  75     public boolean isTrustedIdentity(SignalProtocolAddress address, IdentityKey identityKey) {
  76         List<Identity> identities = trustedKeys.get(address.getName());
  77         if (identities == null) {
  78             // Trust on first use
  79             return true;
  80         }
  81
  82         for (Identity id : identities) {
  83             if (id.identityKey.equals(identityKey)) {
  84                 return id.isTrusted();
  85             }
  86         }
  87
  88         return false;
  89     }
  90
  91     public Map<String, List<Identity>> getIdentities() {
  92         // TODO deep copy
  93         return trustedKeys;
  94     }
  95
  96     public List<Identity> getIdentities(String name) {
  97         // TODO deep copy
  98         return trustedKeys.get(name);
  99     }
 100
 101     public static class JsonIdentityKeyStoreDeserializer extends JsonDeserializer<JsonIdentityKeyStore> {
 102
 103         @Override
 104         public JsonIdentityKeyStore deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
 105             JsonNode node = jsonParser.getCodec().readTree(jsonParser);
 106
 107             try {
 108                 int localRegistrationId = node.get("registrationId").asInt();
 109                 IdentityKeyPair identityKeyPair = new IdentityKeyPair(Base64.decode(node.get("identityKey").asText()));
 110
 111
 112                 JsonIdentityKeyStore keyStore = new JsonIdentityKeyStore(identityKeyPair, localRegistrationId);
 113
 114                 JsonNode trustedKeysNode = node.get("trustedKeys");
 115                 if (trustedKeysNode.isArray()) {
 116                     for (JsonNode trustedKey : trustedKeysNode) {
 117                         String trustedKeyName = trustedKey.get("name").asText();
 118                         try {
 119                             IdentityKey id = new IdentityKey(Base64.decode(trustedKey.get("identityKey").asText()), 0);
 120                             TrustLevel trustLevel = trustedKey.has("trustLevel") ? TrustLevel.fromInt(trustedKey.get("trustLevel").asInt()) : TrustLevel.TRUSTED_UNVERIFIED;
 121                             Date added = trustedKey.has("addedTimestamp") ? new Date(trustedKey.get("addedTimestamp").asLong()) : new Date();
 122                             keyStore.saveIdentity(trustedKeyName, id, trustLevel, added);
 123                         } catch (InvalidKeyException | IOException e) {
 124                             System.out.println(String.format("Error while decoding key for: %s", trustedKeyName));
 125                         }
 126                     }
 127                 }
 128
 129                 return keyStore;
 130             } catch (InvalidKeyException e) {
 131                 throw new IOException(e);
 132             }
 133         }
 134     }
 135
 136     public static class JsonIdentityKeyStoreSerializer extends JsonSerializer<JsonIdentityKeyStore> {
 137
 138         @Override
 139         public void serialize(JsonIdentityKeyStore jsonIdentityKeyStore, JsonGenerator json, SerializerProvider serializerProvider) throws IOException, JsonProcessingException {
 140             json.writeStartObject();
 141             json.writeNumberField("registrationId", jsonIdentityKeyStore.getLocalRegistrationId());
 142             json.writeStringField("identityKey", Base64.encodeBytes(jsonIdentityKeyStore.getIdentityKeyPair().serialize()));
 143             json.writeArrayFieldStart("trustedKeys");
 144             for (Map.Entry<String, List<Identity>> trustedKey : jsonIdentityKeyStore.trustedKeys.entrySet()) {
 145                 for (Identity id : trustedKey.getValue()) {
 146                     json.writeStartObject();
 147                     json.writeStringField("name", trustedKey.getKey());
 148                     json.writeStringField("identityKey", Base64.encodeBytes(id.identityKey.serialize()));
 149                     json.writeNumberField("trustLevel", id.trustLevel.ordinal());
 150                     json.writeNumberField("addedTimestamp", id.added.getTime());
 151                     json.writeEndObject();
 152                 }
 153             }
 154             json.writeEndArray();
 155             json.writeEndObject();
 156         }
 157     }
 158
 159     public class Identity {
 160         IdentityKey identityKey;
 161         TrustLevel trustLevel;
 162         Date added;
 163
 164         public Identity(IdentityKey identityKey, TrustLevel trustLevel) {
 165             this.identityKey = identityKey;
 166             this.trustLevel = trustLevel;
 167             this.added = new Date();
 168         }
 169
 170         public Identity(IdentityKey identityKey, TrustLevel trustLevel, Date added) {
 171             this.identityKey = identityKey;
 172             this.trustLevel = trustLevel;
 173             this.added = added;
 174         }
 175
 176         public boolean isTrusted() {
 177             return trustLevel == TrustLevel.TRUSTED_UNVERIFIED ||
 178                     trustLevel == TrustLevel.TRUSTED_VERIFIED;
 179         }
 180
 181         public byte[] getFingerprint() {
 182             return identityKey.getPublicKey().serialize();
 183         }
 184     }
 185 }