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