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D69.1732453427.diff
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diff --git a/src/client/actions/encryption.cpp b/src/client/actions/encryption.cpp
--- a/src/client/actions/encryption.cpp
+++ b/src/client/actions/encryption.cpp
@@ -289,9 +289,8 @@
std::string roomId = content.get().at("room_id");
std::string sessionId = content.get().at("session_id");
std::string sessionKey = content.get().at("session_key");
- std::string senderKey = e.originalJson().get().at("content").at("sender_key");
- auto k = KeyOfGroupSession{roomId, senderKey, sessionId};
+ auto k = KeyOfGroupSession{roomId, sessionId};
std::string ed25519Key = e.decryptedJson().get().at("keys").at(ed25519);
diff --git a/src/crypto/crypto-util.hpp b/src/crypto/crypto-util.hpp
--- a/src/crypto/crypto-util.hpp
+++ b/src/crypto/crypto-util.hpp
@@ -23,7 +23,6 @@
struct KeyOfGroupSession
{
std::string roomId;
- std::string senderKey;
std::string sessionId;
};
@@ -37,7 +36,6 @@
inline void from_json(const nlohmann::json &j, KeyOfGroupSession &k)
{
k.roomId = j.at("roomId");
- k.senderKey = j.at("senderKey");
k.sessionId = j.at("sessionId");
}
@@ -45,7 +43,6 @@
{
j = nlohmann::json::object({
{"roomId", k.roomId},
- {"senderKey", k.senderKey},
{"sessionId", k.sessionId},
});
}
@@ -53,7 +50,6 @@
inline bool operator==(KeyOfGroupSession a, KeyOfGroupSession b)
{
return a.roomId == b.roomId
- && a.senderKey == b.senderKey
&& a.sessionId == b.sessionId;
}
@@ -104,7 +100,6 @@
std::size_t operator()(const Kazv::KeyOfGroupSession & k) const noexcept {
std::size_t seed = 0;
boost::hash_combine(seed, k.roomId);
- boost::hash_combine(seed, k.senderKey);
boost::hash_combine(seed, k.sessionId);
return seed;
}
diff --git a/src/crypto/crypto.cpp b/src/crypto/crypto.cpp
--- a/src/crypto/crypto.cpp
+++ b/src/crypto/crypto.cpp
@@ -147,11 +147,10 @@
{
auto content = eventJson.at("content");
- auto senderKey = content.at("sender_key").get<std::string>();
auto sessionId = content.at("session_id").get<std::string>();
auto roomId = eventJson.at("room_id").get<std::string>();
- auto k = KeyOfGroupSession{roomId, senderKey, sessionId};
+ auto k = KeyOfGroupSession{roomId, sessionId};
if (inboundGroupSessions.find(k) == inboundGroupSessions.end()) {
return NotBut("We do not have the keys for this");
@@ -206,9 +205,8 @@
auto &session = outboundGroupSessions.at(roomId);
auto sessionId = session.sessionId();
auto sessionKey = session.sessionKey();
- auto senderKey = curve25519IdentityKey();
- auto k = KeyOfGroupSession{roomId, senderKey, sessionId};
+ auto k = KeyOfGroupSession{roomId, sessionId};
if (! createInboundGroupSession(k, sessionKey, ed25519IdentityKey())) {
kzo.client.warn() << "Create inbound group session from outbound group session failed. We may not be able to read our own messages." << std::endl;
@@ -449,11 +447,10 @@
{
auto content = eventJson.at("content");
- auto senderKey = content.at("sender_key").get<std::string>();
auto sessionId = content.at("session_id").get<std::string>();
auto roomId = eventJson.at("room_id").get<std::string>();
- auto k = KeyOfGroupSession{roomId, senderKey, sessionId};
+ auto k = KeyOfGroupSession{roomId, sessionId};
if (m_d->inboundGroupSessions.find(k) == m_d->inboundGroupSessions.end()) {
return NotBut("We do not have the keys for this");
@@ -531,6 +528,8 @@
return
json{
{"algorithm", CryptoConstants::megOlmAlgo},
+ // NOTE: we might stop sending sender_key in the future
+ // as per the Matrix spec
{"sender_key", curve25519IdentityKey()},
{"ciphertext", ciphertext},
{"session_id", session.sessionId()},
diff --git a/src/tests/crypto-test.cpp b/src/tests/crypto-test.cpp
--- a/src/tests/crypto-test.cpp
+++ b/src/tests/crypto-test.cpp
@@ -487,23 +487,74 @@
);
// encrypt to get the session id
- auto ev = crypto.encryptMegOlm(R"({
+ auto encryptedContent = crypto.encryptMegOlm(R"({
"content": {},
"type": "m.room.message",
"room_id": "!someroom:example.com"
})"_json);
- auto sessionId = ev["session_id"].template get<std::string>();
+ auto sessionId = encryptedContent["session_id"].template get<std::string>();
REQUIRE(crypto.hasInboundGroupSession(KeyOfGroupSession{
"!someroom:example.com",
- crypto.curve25519IdentityKey(),
sessionId,
}));
REQUIRE(!crypto.hasInboundGroupSession(KeyOfGroupSession{
"!someroom:example.com",
- crypto.curve25519IdentityKey(),
sessionId + "something something",
}));
}
+
+TEST_CASE("Crypto::decrypt(MegOlmEvent)", "[crypto][group-session]")
+{
+ Crypto crypto(RandomTag{}, genRandomData(Crypto::constructRandomSize()));
+
+ crypto.rotateMegOlmSessionWithRandom(
+ genRandomData(Crypto::rotateMegOlmSessionRandomSize()),
+ 0,
+ "!someroom:example.com"
+ );
+
+ auto plainText = R"({
+ "content": {"body": "something"},
+ "type": "m.room.message",
+ "room_id": "!someroom:example.com"
+ })"_json;
+ // encrypt to get the session id
+ auto encryptedContent = crypto.encryptMegOlm(plainText);
+
+ auto encryptedEvent = json{
+ {"event_id", "$some-event-id"},
+ {"origin_server_ts", 1719196953000},
+ {"content", encryptedContent},
+ {"type", "m.room.encrypted"},
+ {"room_id", "!someroom:example.com"},
+ };
+
+ auto res = crypto.decrypt(encryptedEvent);
+ auto decrypted = json::parse(res.value());
+ REQUIRE(decrypted == plainText);
+}
+
+TEST_CASE("KeyOfGroupSession serialization", "[crypto][group-session]")
+{
+ {
+ auto k = KeyOfGroupSession{"!someroom:example.com", "some-session-id"};
+ json j = k;
+ REQUIRE(j == json{
+ {"roomId", "!someroom:example.com"},
+ {"sessionId", "some-session-id"},
+ });
+ }
+
+ {
+ json j{
+ {"roomId", "!someroom:example.com"},
+ {"senderKey", "some-key"}, // legacy version
+ {"sessionId", "some-session-id"},
+ };
+ auto k = j.template get<KeyOfGroupSession>();
+ REQUIRE(k == KeyOfGroupSession{"!someroom:example.com", "some-session-id"});
+ }
+}

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