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diff --git a/src/tests/resources/libolm-crypto-dump b/src/tests/resources/libolm-crypto-dump
new file mode 100644
--- /dev/null
+++ b/src/tests/resources/libolm-crypto-dump
@@ -0,0 +1,123 @@
+{
+ "a": {
+ "account": "InbHVpDA1VYNczyPzia2Z2561pe0akDPpBPURkMyWexGY5KXGzsOeU35Cg9NS2+yafv0IrkctQPowY94KljW2il4mY8+pyD4pPfWL1rcQfd1DYmuPQ1eVKE8xoe5FuGpm7+GUgiZNTW1aJIYm/bmvrrv7yhBB6M6IHW/nI7kyJQyv8bRXe8Di0tTLE0EnsQXFK48YF7cFb4p40piDbYfO2qd28V3MizokVL3LBNpvvUT48Gi2calCQJ6HL6iddNFjdhDHfZX70iCN1HM1kIA7/NBiE2DBr6YbpD/zbtaJ0715RNfmSlmi4R0Q9aASn2AL7KMjj9A2p1GRYUAc92F68/1KhrCznm7",
+ "inboundGroupSessions": [
+ [
+ {
+ "roomId": "!foo:example.com",
+ "sessionId": "ugpq3d+cOOyAC4IbxiPnk9eMrRkS3L8LXHd5pIZXT2M"
+ },
+ {
+ "decryptedEvents": [
+ 0,
+ {
+ "eventId": "$1",
+ "originServerTs": 1234
+ }
+ ],
+ "ed25519Key": "wgp5eyDKd4isViNiPpJIeImNu9pGA2Efs/Fnz0YKipk",
+ "session": "32jHxAe1JN1euTkPoVEnMm9pQrK1lsX6lkYdt0ffI+03c2TYFoCjEeUWlajB3AZtoGmtymaBCbaqERHIocypQ4DdxMpFct0iV/OJMldmr+++RWYSdiaHUQtfQJnJNt3ggein5DUNeBlXefU8yRaIBEGh/QZZYRqfCbC/ps/QbNsscXKy3Z3tY9tv3FVOKKv7VT5ObwsK51UpRurenIEi/Nda3RSaqE4HgZWuDDFP9cIwyXOhizIiOkJieNrvuvgSvgMHqNEqWf7yl8lGOq5J1yFKaFZeJGRiy6moTT4lhQwIvsTerdumd8+EuDiQewbyqvi2N51/Z1lnv36ckgHhIKsY17xoh5Ks4ExND7rxJ7p2/v/P+bs/vMsNQA4lXmlTKdmaShxcAftXtiBcdA8ASu83GH6eAMHu",
+ "valid": true
+ }
+ ]
+ ],
+ "knownSessions": {
+ "wklSkg9T1gz0pnYDZUmKrVqQXEDGW8HnQV0JDWqzYVs": {
+ "data": "9F6JOJCSDnejHEAbOlcRQE0nnzSXdkJ4qLl9AjtZq+LDnaX3KISsAd3sqRaI2jVS+d4uL2MbaH7RYlNvrPoKuf3tDdVnSoLa2bKGtE889ENP3lUCzsV9+k+YwOYrwiFu/umc39/GutHFuOR6kHQ8YwGznmGFYTF2uI45GeieST6AFSnyWMx9WBmYgvjtlnplIZiEXRh9aAl2uBkF2/i8wnyLG4t8o9jWdzjRA7SOkXauaY2w1oGHJn6UhKAaKgt3Vl6IRpbxeQ20//FNvS3HIp4sgyBfhoLhJnAg6tf6WBcgFx91gRbs/qQfNmPzzb0dbv5fs21MPFRDvEA+3HV3D+5uB2DoRGaXNiykJl3pt+v7sDt9fcdEzhfFVMN2CA5uZBsWMGUOfG/rtqj/1EeTnfuGFKQOYDIT5eK7qpZHJ2fNuLPuu31+zg",
+ "valid": true
+ }
+ },
+ "numUnpublishedKeys": 1,
+ "outboundGroupSessions": {
+ "!foo:example.com": {
+ "creationTime": 0,
+ "initialSessionKey": "AgAAAABwAZnJFcXBZlo2IeX/8TMVJLYGqTP8GlHPc5AClXecXCMi/1lCnjdke46VN0SGlGJ+iop5GcOEaLBFNUnteHNhaRR/elxA6EilV3V5LFC78bEZsmcGI49RcHIMnArez5Qx2bJOvzDxOLu0M+4/Ck/4VwV9U3wj35WczvpWqjADlLoKat3fnDjsgAuCG8Yj55PXjK0ZEty/C1x3eaSGV09jkciQW9mcrQt6R+Rr7Ci8GulZaHRaIeq9T86dyXT7JaLWbjnH1wearEE77aanBWS83OXjLynatPUg2VE1KZ4DDA",
+ "session": "1TfNuq1pP70TliOdAWVKztCiXpL4eX5wClJur0MHzkzH0KYHLi8NvLrQWk+LbwDy1VU4Kp6Ql1v3iNIgtGOSkS+nMwq3chWdc6WARj5kNkF1vPDACqg2z32J8Zia47OayiCoyuDKxeBIIjuB1Hp1UBomT7Oecad0P8zlf+OarOIPFB38v+YwRu/GHLqvioTLD4lZmHWj2MsoRJ2e3GpHz8rfNqUku6mB5QPijAiuPBHgttCb/jDjSRq3RQlKNZZ/cE7S7bufRfLtzcar0dTYuyRY2lGVbpUGEljx85e99VFsZD3hs8aKVbkB+KdLF4V88F6QQiSkLv4",
+ "valid": true
+ }
+ },
+ "uploadedOneTimeKeysCount": {},
+ "valid": true
+ },
+ "aIdKey": "L75F3cTDIM/bw/n11zm73o0+LpNZ5ll+FCbCH8+OETQ",
+ "b": {
+ "account": "z6sIAP5uTDNqUY8TrUHo+x8WSZieoWuoUN66oYBbk7Jz+UWJ1gQA2nXDZRHOSqS+NQNIMX13IKhXr3916JCDYsQOd1BknfJf8xyYIbYifgb9DKovNBOQm7jOxqRXF+IOkklDy/r3lWvd58fN83LvP7g8kjtDi4XSq1KULfuMiAeF3FnLuMGQWkY9Qc9nNHFjbWkoulv8Xf7uT5sc95VjlpMLk2Oe2mOxuUuSze5KuzNQvGOz2vefVw",
+ "inboundGroupSessions": [],
+ "knownSessions": {
+ "L75F3cTDIM/bw/n11zm73o0+LpNZ5ll+FCbCH8+OETQ": {
+ "data": "9F6JOJCSDnejHEAbOlcRQE0nnzSXdkJ4qLl9AjtZq+LDnaX3KISsAd3sqRaI2jVS+d4uL2MbaH7RYlNvrPoKuf3tDdVnSoLa2bKGtE889ENP3lUCzsV9+k+YwOYrwiFu/umc39/GutHFuOR6kHQ8YwGznmGFYTF2uI45GeieST4CQWW2fUQsb5KdTkeRgJEP6slQGr249D7Cbqs7UYuFKmKu3fDZSoAbJX9IX+s1JJXQNqR22R58ZTI88dLl/hGPZgXgp+M1+8WLrl1/hW4w5aUdNtuF6ezKpGWfWiEYX3p0QgQgwaBqew",
+ "valid": true
+ }
+ },
+ "numUnpublishedKeys": 0,
+ "outboundGroupSessions": {},
+ "uploadedOneTimeKeysCount": {},
+ "valid": true
+ },
+ "bIdKey": "wklSkg9T1gz0pnYDZUmKrVqQXEDGW8HnQV0JDWqzYVs",
+ "megolmEncrypted": {
+ "content": {
+ "algorithm": "m.megolm.v1.aes-sha2",
+ "ciphertext": "AwgAElCaGCczDxlcpqmVOxHO0PD0E0WEUA89CRi0G6R8i/AnyPGVSopCZVK5D/Usv/69FcFa17Ds4Kght74UnaQbrUQIuU5s/DaAz7VxSAxFaFs2E0tUHFpXh1CJuTQKaceLiTmQxQWTHYGZXNb2kZ/oOM6Yygpxu9Iaz/N4Zr+nYnrAHWidcaH+TElgimnk4FXjiTDvWNpWMzmJAw",
+ "sender_key": "L75F3cTDIM/bw/n11zm73o0+LpNZ5ll+FCbCH8+OETQ",
+ "session_id": "ugpq3d+cOOyAC4IbxiPnk9eMrRkS3L8LXHd5pIZXT2M"
+ },
+ "event_id": "$1",
+ "origin_server_ts": 1234,
+ "room_id": "!foo:example.com"
+ },
+ "megolmPlainText": {
+ "content": {
+ "mew": "mew"
+ },
+ "room_id": "!foo:example.com",
+ "type": "m.room.message"
+ },
+ "olmEncrypted1": {
+ "content": {
+ "algorithm": "m.olm.v1.curve25519-aes-sha2",
+ "ciphertext": {
+ "L75F3cTDIM/bw/n11zm73o0+LpNZ5ll+FCbCH8+OETQ": {
+ "body": "AwogvGHanO3AZ+EgRYBzXxff45/jmpNX5CIkFBo+SrjUamESICu+11zE1eNPsOboLGVjj1adIbWzS1r3NmZ+nneUS2I8GiDCSVKSD1PWDPSmdgNlSYqtWpBcQMZbwedBXQkNarNhWyI/AwogyNnUBXJ2CHMAsEDDPSwQ2QPgn6+/D5L+3fidyqMwGC8QACIQSlvPI16rEXr1qhqmsvuDbUyoDQAbGANK",
+ "type": 0
+ }
+ },
+ "sender_key": "wklSkg9T1gz0pnYDZUmKrVqQXEDGW8HnQV0JDWqzYVs"
+ }
+ },
+ "olmEncrypted2": {
+ "content": {
+ "algorithm": "m.olm.v1.curve25519-aes-sha2",
+ "ciphertext": {
+ "wklSkg9T1gz0pnYDZUmKrVqQXEDGW8HnQV0JDWqzYVs": {
+ "body": "AwogHp+8jwr0qOHA/olaTGwc0aCj+hLb5LjkrRiSjA2+GRsQACIQrbIEczIcTnraT17CWsNJMrxyeTgLPXqT",
+ "type": 1
+ }
+ },
+ "sender_key": "L75F3cTDIM/bw/n11zm73o0+LpNZ5ll+FCbCH8+OETQ"
+ }
+ },
+ "olmPlainText": {
+ "test": "mew"
+ },
+ "oneTimeKeys1": {
+ "curve25519": {
+ "AAAAAQ": "vGHanO3AZ+EgRYBzXxff45/jmpNX5CIkFBo+SrjUamE"
+ }
+ },
+ "oneTimeKeys2": {
+ "curve25519": {
+ "AAAAAg": "XlP9NyP2FSyhuY/WYpEH9PdGOHdrpD6RjtbStyxSFlU"
+ }
+ },
+ "seeds": {
+ "construct1": "x22PyHo0qa65Ur8sxESNGkmh0bOPm2sa6ijiVM3EmYawEgUVaW8snFpGBACPqRFOkQmj8OA9sN2VU72uGseWfg",
+ "construct2": "F4RXaQfaGZsPGyELCknCEEtEza8ij8PUNCtmQAnBxxYj6JpR63gTUOe/bpxWpW+o3T1sIvwwRJR4SLwQDpPkDg",
+ "createOutbound": "bEYzNPryucXP0c1dTWL05eqXRgMboc8MmgRTrBp88OfVwnVj+ALz7i9XdelCbrs2Efn1Gc4MXnzq5I1ehmTzQQ",
+ "encryptOlm1": "lqkzYypWvu0PhZr+xk8UwU/u6ghsUsGwIY5ixQ6OrvI",
+ "encryptOlm2": "YXcyZmFFNwTPPt/PTg9TzVWbV2dPR3m11AbQFXatcNQ",
+ "oneTimeKeys1": "QvvCrMSXI9DkSW0jTX2hseTuIsCcQgkzdx5lUNpf2Fs",
+ "oneTimeKeys2": "pOM8FDXy3bnYM6Rdo3lyt5APefIWdg+S5nmACuTqK3E",
+ "rotateMegOlm1": "cAGZyRXFwWZaNiHl//EzFSS2Bqkz/BpRz3OQApV3nFwjIv9ZQp43ZHuOlTdEhpRifoqKeRnDhGiwRTVJ7XhzYWkUf3pcQOhIpVd1eSxQu/GxGbJnBiOPUXByDJwK3s+UMdmyTr8w8Ti7tDPuPwpP+FcFfVN8I9+VnM76VqowA5Q+vOR01rXPWVpEx0ZJFjn3GAX1R4tXnRVCUDzxsglqjg"
+ }
+}
diff --git a/tools/generate-libolm-crypto-dump.cpp b/tools/generate-libolm-crypto-dump.cpp
new file mode 100644
--- /dev/null
+++ b/tools/generate-libolm-crypto-dump.cpp
@@ -0,0 +1,127 @@
+/*
+ * This file is part of libkazv.
+ * SPDX-FileCopyrightText: 2024 tusooa <tusooa@kazv.moe>
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+#include <libkazv-config.hpp>
+#include <iostream>
+#include <crypto.hpp>
+#include <crypto-util.hpp>
+#include <base64.hpp>
+#include <types.hpp>
+
+using namespace Kazv;
+using namespace Kazv::CryptoConstants;
+
+// This program generates a dump of olm accounts, sessions,
+// and megolm sessions. It is intended to be linked against
+// the libolm implementation of libkazvcrypto.
+//
+// The generated file is at src/tests/resources/libolm-crypto-dump .
+// It is used to test the conversion from a libolm Crypto
+// to a future vodozemac Crypto.
+
+static json convert(std::unordered_map<std::string, RandomData> seeds)
+{
+ auto res = json::object();
+ for (auto [k, v] : seeds) {
+ res[k] = encodeBase64(v);
+ }
+ return res;
+}
+
+static void verify(MaybeString s)
+{
+ if (!s.has_value()) {
+ throw std::runtime_error{s.reason()};
+ }
+}
+
+int main()
+{
+ auto seeds = std::unordered_map<std::string, RandomData>{};
+ seeds["construct1"] = genRandomData(Crypto::constructRandomSize());
+ auto a = Crypto(RandomTag{}, seeds["construct1"]);
+
+ seeds["construct2"] = genRandomData(Crypto::constructRandomSize());
+ auto b = Crypto(RandomTag{}, seeds["construct2"]);
+
+ seeds["oneTimeKeys1"] = genRandomData(Crypto::genOneTimeKeysRandomSize(1));
+ a.genOneTimeKeysWithRandom(seeds["oneTimeKeys1"], 1);
+
+ auto k = a.unpublishedOneTimeKeys();
+ a.markOneTimeKeysAsPublished();
+
+ seeds["oneTimeKeys2"] = genRandomData(Crypto::genOneTimeKeysRandomSize(1));
+ a.genOneTimeKeysWithRandom(seeds["oneTimeKeys2"], 1);
+ auto k2 = a.unpublishedOneTimeKeys();
+
+ auto oneTimeKey = k[curve25519].begin().value();
+ auto aIdKey = a.curve25519IdentityKey();
+ auto bIdKey = b.curve25519IdentityKey();
+
+ seeds["createOutbound"] = genRandomData(Crypto::createOutboundSessionRandomSize());
+ b.createOutboundSessionWithRandom(seeds["createOutbound"], aIdKey, oneTimeKey);
+
+ auto origJson = json{{"test", "mew"}};
+ seeds["encryptOlm1"] = genRandomData(Crypto::encryptOlmMaxRandomSize());
+ auto encryptedMsg = b.encryptOlmWithRandom(seeds["encryptOlm1"], origJson, aIdKey);
+ auto encJson = json{{"content", {
+ {"algorithm", olmAlgo},
+ {"ciphertext", encryptedMsg},
+ {"sender_key", b.curve25519IdentityKey()}
+ }}};
+
+ auto decryptedOpt = a.decrypt(encJson);
+ verify(decryptedOpt);
+
+ seeds["encryptOlm2"] = genRandomData(Crypto::encryptOlmMaxRandomSize());
+ auto encryptedMsg2 = a.encryptOlmWithRandom(seeds["encryptOlm2"], origJson, bIdKey);
+ auto encJson2 = json{{"content", {
+ {"algorithm", olmAlgo},
+ {"ciphertext", encryptedMsg2},
+ {"sender_key", a.curve25519IdentityKey()}
+ }}};
+
+ decryptedOpt = b.decrypt(encJson2);
+ verify(decryptedOpt);
+
+ seeds["rotateMegOlm1"] = genRandomData(Crypto::rotateMegOlmSessionRandomSize());
+
+ a.rotateMegOlmSessionWithRandom(seeds["rotateMegOlm1"], 0, "!foo:example.com");
+
+ auto megolmPlainText = json{
+ {"type", "m.room.message"},
+ {"room_id", "!foo:example.com"},
+ {"content", {
+ {"mew", "mew"}
+ }}
+ };
+ auto encryptedContent = a.encryptMegOlm(megolmPlainText);
+
+ auto encrypted = json{
+ {"event_id", "$1"},
+ {"origin_server_ts", 1234},
+ {"room_id", "!foo:example.com"},
+ {"content", encryptedContent},
+ };
+
+ decryptedOpt = a.decrypt(encrypted);
+ verify(decryptedOpt);
+
+ std::cout << json{
+ {"seeds", convert(seeds)},
+ {"oneTimeKeys1", k},
+ {"oneTimeKeys2", k2},
+ {"olmPlainText", origJson},
+ {"olmEncrypted1", encJson},
+ {"olmEncrypted2", encJson2},
+ {"megolmPlainText", megolmPlainText},
+ {"megolmEncrypted", encrypted},
+ {"aIdKey", aIdKey},
+ {"a", a.toJson()},
+ {"bIdKey", bIdKey},
+ {"b", b.toJson()},
+ }.dump();
+}

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