objects.broadcast

README.md

@@ -46,11 +46,11 @@ API documentation is available [here](https://bitchan.github.io/bitmessage/docs/
   - [x] inv
   - [x] getdata
   - [x] error
-- [ ] Object types
+- [x] Object types
   - [x] getpubkey
   - [x] pubkey
   - [x] msg
-  - [ ] broadcast
+  - [x] broadcast
 - [x] WIF
 - [x] POW
 - [x] High-level classes

lib/address.js

@@ -116,9 +116,19 @@ Address.prototype.getPubkeyPrivateKey = function() {
   return bmcrypto.sha512(getaddrhash(this)).slice(0, 32);
 };
 
+/**
+ * Calculate the corresponding public key for encryption key used to
+ * encrypt/decrypt {@link pubkey} objects.
+ * @return {Buffer} A 65-byte public key.
+ */
+Address.prototype.getPubkeyPublicKey = function() {
+  return bmcrypto.getPublic(this.getPubkeyPrivateKey());
+};
+
 /**
  * Calculate the encryption key used to encrypt/decrypt
  * {@link broadcast} objects.
+ * @return {Buffer} A 32-byte private key.
  */
 Address.prototype.getBroadcastPrivateKey = function() {
   if (this.version >= 4) {
@@ -128,6 +138,15 @@ Address.prototype.getBroadcastPrivateKey = function() {
   }
 };
 
+/**
+ * Calculate the corresponding public key for encryption key used to
+ * encrypt/decrypt {@link broadcast} objects.
+ * @return {Buffer} A 65-byte public key.
+ */
+Address.prototype.getBroadcastPublicKey = function() {
+  return bmcrypto.getPublic(this.getBroadcastPrivateKey());
+};
+
 /**
  * Calculate the address tag.
  * @return {Buffer} A 32-byte address tag.

lib/objects.js

@@ -183,26 +183,25 @@ function extractPubkeyV3(buf) {
   return decoded;
 }
 
-function findPubkeyPrivateKey(neededPubkeys, tag) {
+// Note that tag matching only works for address version >= 4.
-  // `neededPubkeys` is either single address or addresses array or
+function findAddrByTag(addrs, tag) {
-  // Object key-by-tag. Time to match the tag is O(1), O(n), O(1)
+  var i, addr;
-  // respectfully.
+  addrs = addrs || [];
-  neededPubkeys = neededPubkeys || {};
+  if (Address.isAddress(addrs)) {
-  var addr, addrs, i;
+    addrs = [addrs];
-  if (Address.isAddress(neededPubkeys)) {
-    addr = neededPubkeys;
-    if (bufferEqual(addr.getTag(), tag)) {
-      return addr.getPubkeyPrivateKey();
   }
-  } else if (Array.isArray(neededPubkeys)) {
+  if (Array.isArray(addrs)) {
-    addrs = neededPubkeys;
     for (i = 0; i < addrs.length; i++) {
-      if (bufferEqual(addrs[i].getTag(), tag)) {
+      addr = addrs[i];
-        return addrs[i].getPubkeyPrivateKey();
+      if (addr.version >= 4 && bufferEqual(addr.getTag(), tag)) {
+        return addr;
       }
     }
   } else {
-    return neededPubkeys[tag];
+    addr = addrs[tag];
+    if (addr && addr.version >= 4) {
+      return addr;
+    }
   }
 }
 
@@ -235,7 +234,7 @@ var pubkey = exports.pubkey = {
    * @param {?(Address[]|Address|Object)} opts.needed - Address objects
    * which represent pubkeys that we are interested in. This is used
    * only for pubkeys v4. `needed` is either single address or addresses
-   * array or Object key-by-tag. Time to match the tag is O(1), O(n),
+   * array or Object addr-by-tag. Time to match the key is O(1), O(n),
    * O(1) respectfully.
    * @return {Promise.<Object>} A promise that contains decoded `pubkey`
    * object structure when fulfilled.
@@ -250,7 +249,7 @@ var pubkey = exports.pubkey = {
       assert(version <= 4, "Address version is too high");
       var objectPayload = util.popkey(decoded, "objectPayload");
       var siglen, pos, sig, dataToVerify, pubkeyp;
-      var tag, pubkeyPrivateKey, dataToDecrypt;
+      var tag, addr, pubkeyPrivateKey, dataToDecrypt;
 
       // v2 pubkey.
       if (version === 2) {
@@ -284,8 +283,9 @@ var pubkey = exports.pubkey = {
       // v4 pubkey.
       assert(objectPayload.length >= 32, "Bad pubkey v4 object payload length");
       tag = decoded.tag = objectPayload.slice(0, 32);
-      pubkeyPrivateKey = findPubkeyPrivateKey(opts.needed, tag);
+      addr = findAddrByTag(opts.needed, tag);
-      assert(pubkeyPrivateKey, "You are not interested in this pubkey v4");
+      assert(addr, "You are not interested in this pubkey v4");
+      pubkeyPrivateKey = addr.getPubkeyPrivateKey();
       dataToDecrypt = objectPayload.slice(32);
       pubkeyp = bmcrypto
         .decrypt(pubkeyPrivateKey, dataToDecrypt)
@@ -402,14 +402,12 @@ var pubkey = exports.pubkey = {
       opts.objectPayload = from.getTag();
       obj = object.encodePayloadWithoutNonce(opts);
       var dataToSign = Buffer.concat([obj].concat(pubkeyData));
-      var pubkeyEncPrivateKey = from.getPubkeyPrivateKey();
-      var pubkeyEncPublicKey = bmcrypto.getPublic(pubkeyEncPrivateKey);
       pubkeyp = bmcrypto
         .sign(from.signPrivateKey, dataToSign)
         .then(function(sig) {
           var dataToEnc = pubkeyData.concat(var_int.encode(sig.length), sig);
           dataToEnc = Buffer.concat(dataToEnc);
-          return bmcrypto.encrypt(pubkeyEncPublicKey, dataToEnc);
+          return bmcrypto.encrypt(from.getPubkeyPublicKey(), dataToEnc);
         }).then(function(enc) {
           // POW calculation here.
           var nonce = new Buffer(8);
@@ -425,7 +423,8 @@ var pubkey = exports.pubkey = {
 function tryDecryptMsg(identities, buf) {
   function inner(i) {
     if (i > last) {
-      return promise.reject("Failed to decrypt msg with given identities");
+      var err = new Error("Failed to decrypt msg with given identities");
+      return promise.reject(err);
     }
     return bmcrypto
       .decrypt(identities[i].encPrivateKey, buf)
@@ -436,6 +435,9 @@ function tryDecryptMsg(identities, buf) {
       });
   }
 
+  if (Address.isAddress(identities)) {
+    identities = [identities];
+  }
   var last = identities.length - 1;
   return inner(0);
 }
@@ -546,23 +548,20 @@ var msg = exports.msg = {
    */
   decodePayloadAsync: function(buf, opts) {
     return new promise(function(resolve) {
-      var identities = opts.identities;
-      if (Address.isAddress(identities)) {
-        identities = [identities];
-      }
       var decoded = object.decodePayload(buf);
       assert(decoded.type === object.MSG, "Bad object type");
       assert(decoded.version === 1, "Bad msg version");
       var objectPayload = util.popkey(decoded, "objectPayload");
 
-      var msgp = tryDecryptMsg(identities, objectPayload)
+      var msgp = tryDecryptMsg(opts.identities, objectPayload)
         .then(function(decInfo) {
           var decrypted = decInfo.decrypted;
 
           // Version, stream.
-          // TODO(Kagami): Validate version range?
           var decodedVersion = var_int.decode(decrypted);
-          decoded.senderVersion = decodedVersion.value;
+          var senderVersion = decoded.senderVersion = decodedVersion.value;
+          assert(senderVersion >= 2, "Sender version is too low");
+          assert(senderVersion <= 4, "Sender version is too high");
           var decodedStream = var_int.decode(decodedVersion.rest);
           decoded.senderStream = decodedStream.value;
 
@@ -588,9 +587,11 @@ var msg = exports.msg = {
           // Ripe, encoding.
           assert(rest.length >= 20, "Bad msg object payload length");
           decoded.ripe = rest.slice(0, 20);
+          // TODO(Kagami): Also check against the calculatedRipe (see
+          // GH-6)?
           assert(
             bufferEqual(decoded.ripe, decInfo.addr.ripe),
-            "msg was decrypted but the destination ripe differs");
+            "msg was decrypted but the destination ripe doesn't match");
           decoded.length += 20;
           var decodedEncoding = var_int.decode(rest.slice(20));
           var encoding = decoded.encoding = decodedEncoding.value;
@@ -664,6 +665,8 @@ var msg = exports.msg = {
       opts.type = object.MSG;
       opts.version = 1;  // The only known msg version
       var from = Address.decode(opts.from);
+      assert(from.version >= 2, "Address version is too low");
+      assert(from.version <= 4, "Address version is too high");
       var to = Address.decode(opts.to);
       opts.stream = to.stream;
       var nonceTrialsPerByte, payloadLengthExtraBytes;
@@ -724,3 +727,263 @@ var msg = exports.msg = {
 };
 
 var DEFAULT_ENCODING = msg.TRIVIAL;
+
+// Try to decrypt broadcast v4 with all provided subscription objects.
+function tryDecryptBroadcastV4(subscriptions, buf) {
+  function inner(i) {
+    if (i > last) {
+      var err = new Error("Failed to decrypt msg with given identities");
+      return promise.reject(err);
+    }
+    return bmcrypto
+      .decrypt(subscriptions[i].getBroadcastPrivateKey(), buf)
+      .then(function(decrypted) {
+        return {addr: subscriptions[i], decrypted: decrypted};
+      }).catch(function() {
+        return inner(i + 1);
+      });
+  }
+
+  if (Address.isAddress(subscriptions)) {
+    subscriptions = [subscriptions];
+  } else if (!Array.isArray(subscriptions)) {
+    subscriptions = Object.keys(subscriptions).map(function(k) {
+      return subscriptions[k];
+    });
+  }
+  // Only addresses with version < 4 may be used to encode broadcast v4.
+  subscriptions = subscriptions.filter(function(a) {
+    return a.version < 4;
+  });
+  var last = subscriptions.length - 1;
+  return inner(0);
+}
+
+/**
+ * `broadcast` object.
+ * @see {@link https://bitmessage.org/wiki/Protocol_specification#broadcast}
+ * @namespace
+ * @static
+ */
+var broadcast = exports.broadcast = {
+  /**
+   * Decode `broadcast` object message.
+   * @param {Buffer} buf - Message
+   * @param {?Object} opts - Decoding options
+   * @return {Promise.<Object>} A promise that contains decoded
+   * `broadcast` object structure when fulfilled.
+   */
+  decodeAsync: function(buf, opts) {
+    return new promise(function(resolve) {
+      var decoded = message.decode(buf);
+      assert(decoded.command === "object", "Bad command");
+      resolve(broadcast.decodePayloadAsync(decoded.payload, opts));
+    });
+  },
+
+  /**
+   * Decode `broadcast` object message payload.
+   * @param {Buffer} buf - Message payload
+   * @param {Object} opts - Decoding options
+   * @param {(Address[]|Address|Object)} opts.subscriptions - Address
+   * objects which represent broadcast subscriptions. `subscriptions` is
+   * either single address or addresses array or Object
+   * addr-by-tag/addr-by-ripe. Time to match the key is O(1), O(n), O(1)
+   * respectfully.
+   * @return {Promise.<Object>} A promise that contains decoded `pubkey`
+   * object structure when fulfilled.
+   */
+  decodePayloadAsync: function(buf, opts) {
+    return new promise(function(resolve) {
+      var decoded = object.decodePayload(buf);
+      assert(decoded.type === object.BROADCAST, "Bad object type");
+      var version = decoded.version;
+      assert(version === 4 || version === 5, "Bad broadcast version");
+      var objectPayload = util.popkey(decoded, "objectPayload");
+      var tag, addr, broadPrivateKey, dataToDecrypt, broadp;
+
+      if (version === 4) {
+        broadp = tryDecryptBroadcastV4(opts.subscriptions, objectPayload);
+      } else {
+        assert(
+          objectPayload.length >= 32,
+          "Bad broadcast v5 object payload length");
+        tag = decoded.tag = objectPayload.slice(0, 32);
+        addr = findAddrByTag(opts.subscriptions, tag);
+        assert(addr, "You are not interested in this broadcast v5");
+        broadPrivateKey = addr.getBroadcastPrivateKey();
+        dataToDecrypt = objectPayload.slice(32);
+        broadp = bmcrypto
+          .decrypt(broadPrivateKey, dataToDecrypt)
+          .then(function(decrypted) {
+            return {addr: addr, decrypted: decrypted};
+          });
+      }
+
+      broadp = broadp.then(function(decInfo) {
+        var decrypted = decInfo.decrypted;
+
+        // Version, stream.
+        var decodedVersion = var_int.decode(decrypted);
+        var senderVersion = decoded.senderVersion = decodedVersion.value;
+        if (version === 4) {
+          assert(senderVersion >= 2, "Sender version is too low");
+          assert(senderVersion <= 3, "Sender version is too high");
+        } else {
+          assert(senderVersion === 4, "Bad sender version");
+        }
+        var decodedStream = var_int.decode(decodedVersion.rest);
+        var senderStream = decoded.senderStream = decodedStream.value;
+        assert(
+          senderStream === decoded.stream,
+          "Cleartext broadcast object stream doesn't match encrypted");
+
+        // Behavior, keys.
+        assert(
+          decodedStream.rest.length >= 132,
+          "Bad broadcast object payload length");
+        objectAssign(decoded, extractPubkey(decodedStream.rest));
+        decoded.length += decodedVersion.length + decodedStream.length;
+        var rest = decrypted.slice(decoded.length);
+        var sender = new Address({
+          version: senderVersion,
+          stream: senderStream,
+          signPublicKey: decoded.signPublicKey,
+          encPublicKey: decoded.encPublicKey,
+        });
+        if (version === 4) {
+          assert(
+            bufferEqual(sender.ripe, decInfo.addr.ripe),
+            "The keys used to encrypt the broadcast doesn't match the keys "+
+            "embedded into the object");
+        } else {
+          assert(
+            bufferEqual(sender.getTag(), tag),
+            "The tag used to encrypt the broadcast doesn't match the keys "+
+            "and version/stream embedded into the object");
+        }
+
+        // Pow extra.
+        if (senderVersion >= 3) {
+          var decodedTrials = var_int.decode(rest);
+          decoded.nonceTrialsPerByte = decodedTrials.value;
+          decoded.length += decodedTrials.length;
+          var decodedExtraBytes = var_int.decode(decodedTrials.rest);
+          decoded.payloadLengthExtraBytes = decodedExtraBytes.value;
+          decoded.length += decodedExtraBytes.length;
+          rest = decodedExtraBytes.rest;
+        }
+
+        // Encoding, message
+        var decodedEncoding = var_int.decode(rest);
+        var encoding = decoded.encoding = decodedEncoding.value;
+        decoded.length += decodedEncoding.length;
+        var decodedMsgLength = var_int.decode(decodedEncoding.rest);
+        var msglen = decodedMsgLength.value;
+        rest = decodedMsgLength.rest;
+        assert(rest.length >= msglen, "Bad broadcast object payload length");
+        decoded.length += decodedMsgLength.length + msglen;
+        var message = rest.slice(0, msglen);
+        objectAssign(decoded, decodeMessage(message, encoding));
+
+        // Signature.
+        var decodedSigLength = var_int.decode(rest.slice(msglen));
+        var siglen = decodedSigLength.value;
+        rest = decodedSigLength.rest;
+        assert(rest.length >= siglen, "Bad broadcast object payload length");
+        var sig = decoded.signature = rest.slice(0, siglen);
+
+        // Verify signature.
+        var headerLength = decoded.headerLength;
+        if (version !== 4) {
+          // Compensate for tag.
+          headerLength += 32;
+        }
+        var dataToVerify = Buffer.concat([
+          // Object header without nonce.
+          buf.slice(8, headerLength),
+          // Unencrypted pubkey data without signature.
+          decrypted.slice(0, decoded.length),
+        ]);
+        // Since data is encrypted, entire object payload is used.
+        decoded.length = objectPayload.length;
+        return bmcrypto.verify(decoded.signPublicKey, dataToVerify, sig);
+      }).then(function() {
+        return decoded;
+      });
+      resolve(broadp);
+    });
+  },
+
+  /**
+   * Encode `broadcast` object message.
+   * @param {Object} opts - `broadcast` object options
+   * @return {Promise.<Buffer>} A promise that contains encoded message
+   * when fulfilled.
+   */
+  encodeAsync: function(opts) {
+    return broadcast.encodePayloadAsync(opts).then(function(payload) {
+      return message.encode("object", payload);
+    });
+  },
+
+  /**
+   * Encode `broadcast` object message payload.
+   * @param {Object} opts - `broadcast` object options
+   * @return {Promise.<Buffer>} A promise that contains encoded message
+   * payload when fulfilled.
+   */
+  // FIXME(Kagami): Do a POW.
+  encodePayloadAsync: function(opts) {
+    return new promise(function(resolve) {
+      // Deal with options.
+      opts = objectAssign({}, opts);
+      opts.type = object.BROADCAST;
+      var from = Address.decode(opts.from);
+      assert(from.version >= 2, "Address version is too low");
+      assert(from.version <= 4, "Address version is too high");
+      opts.version = from.version >= 4 ? 5 : 4;
+      opts.stream = from.stream;
+      var encoding = opts.encoding || DEFAULT_ENCODING;
+      var message = encodeMessage(opts);
+
+      // Assemble the unencrypted message data.
+      var broadData = [
+        var_int.encode(from.version),
+        var_int.encode(from.stream),
+        from.behavior.buffer,
+        from.signPublicKey.slice(1),
+        from.encPublicKey.slice(1),
+      ];
+      if (from.version >= 3) {
+        broadData.push(
+          var_int.encode(util.getTrials(from)),
+          var_int.encode(util.getExtraBytes(from))
+        );
+      }
+      broadData.push(
+        var_int.encode(encoding),
+        var_int.encode(message.length),
+        message
+      );
+
+      // Sign and encrypt.
+      opts.objectPayload = from.version >= 4 ? from.getTag() : new Buffer(0);
+      var obj = object.encodePayloadWithoutNonce(opts);
+      var dataToSign = Buffer.concat([obj].concat(broadData));
+      var broadp = bmcrypto
+        .sign(from.signPrivateKey, dataToSign)
+        .then(function(sig) {
+          var dataToEnc = broadData.concat(var_int.encode(sig.length), sig);
+          dataToEnc = Buffer.concat(dataToEnc);
+          return bmcrypto.encrypt(from.getBroadcastPublicKey(), dataToEnc);
+        }).then(function(enc) {
+          // POW calculation here.
+          var nonce = new Buffer(8);
+          // Concat object header with ecnrypted data and we are done.
+          return Buffer.concat([nonce, obj, enc]);
+        });
+      resolve(broadp);
+    });
+  },
+};

test.js

@@ -27,6 +27,7 @@ var objects = bitmessage.objects;
 var getpubkey = objects.getpubkey;
 var pubkey = objects.pubkey;
 var msg = objects.msg;
+var broadcast = objects.broadcast;
 var WIF = bitmessage.WIF;
 var POW = bitmessage.POW;
 var Address = bitmessage.Address;
@@ -504,6 +505,11 @@ describe("Object types", function() {
     signPrivateKey: signPrivateKey,
     encPrivateKey: encPrivateKey,
   });
+  var fromV3 = Address({
+    version: 3,
+    signPrivateKey: signPrivateKey,
+    encPrivateKey: encPrivateKey,
+  });
 
   it("should get type of the encoded object message", function() {
     var encoded = object.encode({
@@ -689,6 +695,74 @@ describe("Object types", function() {
       });
     });
   });
+
+  describe("broadcast", function() {
+    it("should encode and decode broadcast v4", function() {
+      return broadcast.encodeAsync({
+        ttl: 987,
+        from: fromV3,
+        message: "test",
+      }).then(function(buf) {
+        expect(message.decode(buf).command).to.equal("object");
+        return broadcast.decodeAsync(buf, {subscriptions: fromV3});
+      }).then(function(res) {
+        expect(res.ttl).to.be.at.most(987);
+        expect(res.type).to.equal(object.BROADCAST);
+        expect(res.version).to.equal(4);
+        expect(res.stream).to.equal(1);
+        expect(res.senderVersion).to.equal(3);
+        expect(res.senderStream).to.equal(1);
+        expect(res.behavior.get(PubkeyBitfield.DOES_ACK)).to.be.true;
+        expect(bufferEqual(res.signPublicKey, signPublicKey)).to.be.true;
+        expect(bufferEqual(res.encPublicKey, encPublicKey)).to.be.true;
+        expect(res.nonceTrialsPerByte).to.equal(1000);
+        expect(res.payloadLengthExtraBytes).to.equal(1000);
+        expect(res.encoding).to.equal(msg.TRIVIAL);
+        expect(res.message).to.equal("test");
+        expect(res).to.not.have.property("subject");
+        expect(Buffer.isBuffer(res.signature)).to.be.true;
+      });
+    });
+
+    it("should encode and decode broadcast v5", function() {
+      return broadcast.encodeAsync({
+        ttl: 101,
+        from: from,
+        message: "キタ━━━(゜∀゜)━━━!!!!!",
+      }).then(function(buf) {
+        expect(message.decode(buf).command).to.equal("object");
+        return broadcast.decodeAsync(buf, {subscriptions: [from]});
+      }).then(function(res) {
+        expect(res.ttl).to.be.at.most(987);
+        expect(res.type).to.equal(object.BROADCAST);
+        expect(res.version).to.equal(5);
+        expect(res.stream).to.equal(1);
+        expect(res.senderVersion).to.equal(4);
+        expect(res.senderStream).to.equal(1);
+        expect(res.behavior.get(PubkeyBitfield.DOES_ACK)).to.be.true;
+        expect(bufferEqual(res.signPublicKey, signPublicKey)).to.be.true;
+        expect(bufferEqual(res.encPublicKey, encPublicKey)).to.be.true;
+        expect(res.nonceTrialsPerByte).to.equal(1000);
+        expect(res.payloadLengthExtraBytes).to.equal(1000);
+        expect(res.encoding).to.equal(msg.TRIVIAL);
+        expect(res.message).to.equal("キタ━━━(゜∀゜)━━━!!!!!");
+        expect(res).to.not.have.property("subject");
+        expect(Buffer.isBuffer(res.signature)).to.be.true;
+      });
+    });
+
+    it("shouldn't decode broadcast without subscriptions", function(done) {
+      return broadcast.encodeAsync({
+        ttl: 101,
+        from: from,
+        message: "test",
+      }).then(function(buf) {
+        return broadcast.decodeAsync(buf, {subscriptions: [fromV3]});
+      }).catch(function() {
+        done();
+      });
+    });
+  });
 });
 
 describe("WIF", function() {
@@ -825,23 +899,40 @@ describe("High-level classes", function() {
       expect(addr.getTag().toString("hex")).to.equal("facf1e3e6c74916203b7f714ca100d4d60604f0917696d0f09330f82f52bed1a");
     });
 
-    it("should calculate a private key to encrypt pubkey object", function() {
+    it("should calculate a private key to decrypt pubkey object", function() {
       var addr = Address.decode("BM-2cTux3PGRqHTEH6wyUP2sWeT4LrsGgy63z");
       expect(addr.getPubkeyPrivateKey().toString("hex")).to.equal("15e516173769dc87d4a8e8ed90200362fa58c0228bb2b70b06f26c089a9823a4");
     });
 
-    it("should calculate a private key to encrypt broadcast v4", function() {
+    it("should calculate a public key to encrypt pubkey object", function() {
+      var addr = Address.decode("BM-2cTux3PGRqHTEH6wyUP2sWeT4LrsGgy63z");
+      expect(addr.getPubkeyPublicKey().toString("hex")).to.equal("04ee196be97db61886beeec9ebc2c28b7d4cafbc407c31d8aac2f867068f727874e2d305ba970bd09a951aa2cde52b66061a5a8e709cda1125635a97e1c7b85ab4");
+    });
+
+    it("should calculate a private key to decrypt broadcast v4", function() {
       var addr = Address.decode("   2D8Jxw5yiepaQqxrx43iPPNfRqbvWoJLoU   ");
       expect(addr.version).to.equal(3);
       expect(addr.getBroadcastPrivateKey().toString("hex")).to.equal("664420eaed1b6b3208fc04905c2f6ca758594c537eb5a08f2f0c2bbe6f07fb44");
     });
 
-    it("should calculate a private key to encrypt broadcast v5", function() {
+    it("should calculate a public key to encrypt broadcast v4", function() {
+      var addr = Address.decode("   2D8Jxw5yiepaQqxrx43iPPNfRqbvWoJLoU   ");
+      expect(addr.version).to.equal(3);
+      expect(addr.getBroadcastPublicKey().toString("hex")).to.equal("04da633350cf2ef8194b83ae028555971df56a64948940693e54b8b4c2597b8f9e833ac1285b37487121c271346fb29684e723a992aeb37b20962406ccade6c8d3");
+    });
+
+    it("should calculate a private key to decrypt broadcast v5", function() {
       var addr = Address.decode("BM-2cTux3PGRqHTEH6wyUP2sWeT4LrsGgy63z");
       expect(addr.version).to.equal(4);
       expect(addr.getBroadcastPrivateKey().toString("hex")).to.equal("15e516173769dc87d4a8e8ed90200362fa58c0228bb2b70b06f26c089a9823a4");
     });
 
+    it("should calculate a public key to encrypt broadcast v5", function() {
+      var addr = Address.decode("BM-2cTux3PGRqHTEH6wyUP2sWeT4LrsGgy63z");
+      expect(addr.version).to.equal(4);
+      expect(addr.getBroadcastPublicKey().toString("hex")).to.equal("04ee196be97db61886beeec9ebc2c28b7d4cafbc407c31d8aac2f867068f727874e2d305ba970bd09a951aa2cde52b66061a5a8e709cda1125635a97e1c7b85ab4");
+    });
+
     it("should allow to decode Address instance", function() {
       var addr = Address.decode("2cTux3PGRqHTEH6wyUP2sWeT4LrsGgy63z");
       expect(addr.ripe.toString("hex")).to.equal("003ab6655de4bd8c603eba9b00dd5970725fdd56");