diff options
Diffstat (limited to 'launcher/minecraft/auth/Parsers.cpp')
| -rw-r--r-- | launcher/minecraft/auth/Parsers.cpp | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/launcher/minecraft/auth/Parsers.cpp b/launcher/minecraft/auth/Parsers.cpp index 2dd36562..47473899 100644 --- a/launcher/minecraft/auth/Parsers.cpp +++ b/launcher/minecraft/auth/Parsers.cpp @@ -1,4 +1,5 @@ #include "Parsers.h" +#include "Json.h" #include <QJsonDocument> #include <QJsonArray> @@ -212,6 +213,180 @@ bool parseMinecraftProfile(QByteArray & data, MinecraftProfile &output) { return true; } +namespace { + // these skin URLs are for the MHF_Steve and MHF_Alex accounts (made by a Mojang employee) + // they are needed because the session server doesn't return skin urls for default skins + static const QString SKIN_URL_STEVE = "http://textures.minecraft.net/texture/1a4af718455d4aab528e7a61f86fa25e6a369d1768dcb13f7df319a713eb810b"; + static const QString SKIN_URL_ALEX = "http://textures.minecraft.net/texture/83cee5ca6afcdb171285aa00e8049c297b2dbeba0efb8ff970a5677a1b644032"; + + bool isDefaultModelSteve(QString uuid) { + // need to calculate *Java* hashCode of UUID + // if number is even, skin/model is steve, otherwise it is alex + + // just in case dashes are in the id + uuid.remove('-'); + + if (uuid.size() != 32) { + return true; + } + + // qulonglong is guaranteed to be 64 bits + // we need to use unsigned numbers to guarantee truncation below + qulonglong most = uuid.left(16).toULongLong(nullptr, 16); + qulonglong least = uuid.right(16).toULongLong(nullptr, 16); + qulonglong xored = most ^ least; + return ((static_cast<quint32>(xored >> 32)) ^ static_cast<quint32>(xored)) % 2 == 0; + } +} + +/** +Uses session server for skin/cape lookup instead of profile, +because locked Mojang accounts cannot access profile endpoint +(https://api.minecraftservices.com/minecraft/profile/) + +ref: https://wiki.vg/Mojang_API#UUID_to_Profile_and_Skin.2FCape + +{ + "id": "<profile identifier>", + "name": "<player name>", + "properties": [ + { + "name": "textures", + "value": "<base64 string>" + } + ] +} + +decoded base64 "value": +{ + "timestamp": <java time in ms>, + "profileId": "<profile uuid>", + "profileName": "<player name>", + "textures": { + "SKIN": { + "url": "<player skin URL>" + }, + "CAPE": { + "url": "<player cape URL>" + } + } +} +*/ + +bool parseMinecraftProfileMojang(QByteArray & data, MinecraftProfile &output) { + qDebug() << "Parsing Minecraft profile..."; +#ifndef NDEBUG + qDebug() << data; +#endif + + QJsonParseError jsonError; + QJsonDocument doc = QJsonDocument::fromJson(data, &jsonError); + if(jsonError.error) { + qWarning() << "Failed to parse response as JSON: " << jsonError.errorString(); + return false; + } + + auto obj = Json::requireObject(doc, "mojang minecraft profile"); + if(!getString(obj.value("id"), output.id)) { + qWarning() << "Minecraft profile id is not a string"; + return false; + } + + if(!getString(obj.value("name"), output.name)) { + qWarning() << "Minecraft profile name is not a string"; + return false; + } + + auto propsArray = obj.value("properties").toArray(); + QByteArray texturePayload; + for( auto p : propsArray) { + auto pObj = p.toObject(); + auto name = pObj.value("name"); + if (!name.isString() || name.toString() != "textures") { + continue; + } + + auto value = pObj.value("value"); + if (value.isString()) { +#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0) + texturePayload = QByteArray::fromBase64(value.toString().toUtf8(), QByteArray::AbortOnBase64DecodingErrors); +#else + texturePayload = QByteArray::fromBase64(value.toString().toUtf8()); +#endif + } + + if (!texturePayload.isEmpty()) { + break; + } + } + + if (texturePayload.isNull()) { + qWarning() << "No texture payload data"; + return false; + } + + doc = QJsonDocument::fromJson(texturePayload, &jsonError); + if(jsonError.error) { + qWarning() << "Failed to parse response as JSON: " << jsonError.errorString(); + return false; + } + + obj = Json::requireObject(doc, "session texture payload"); + auto textures = obj.value("textures"); + if (!textures.isObject()) { + qWarning() << "No textures array in response"; + return false; + } + + Skin skinOut; + // fill in default skin info ourselves, as this endpoint doesn't provide it + bool steve = isDefaultModelSteve(output.id); + skinOut.variant = steve ? "classic" : "slim"; + skinOut.url = steve ? SKIN_URL_STEVE : SKIN_URL_ALEX; + // sadly we can't figure this out, but I don't think it really matters... + skinOut.id = "00000000-0000-0000-0000-000000000000"; + Cape capeOut; + auto tObj = textures.toObject(); + for (auto idx = tObj.constBegin(); idx != tObj.constEnd(); ++idx) { + if (idx->isObject()) { + if (idx.key() == "SKIN") { + auto skin = idx->toObject(); + if (!getString(skin.value("url"), skinOut.url)) { + qWarning() << "Skin url is not a string"; + return false; + } + + auto maybeMeta = skin.find("metadata"); + if (maybeMeta != skin.end() && maybeMeta->isObject()) { + auto meta = maybeMeta->toObject(); + // might not be present + getString(meta.value("model"), skinOut.variant); + } + } + else if (idx.key() == "CAPE") { + auto cape = idx->toObject(); + if (!getString(cape.value("url"), capeOut.url)) { + qWarning() << "Cape url is not a string"; + return false; + } + + // we don't know the cape ID as it is not returned from the session server + // so just fake it - changing capes is probably locked anyway :( + capeOut.alias = "cape"; + } + } + } + + output.skin = skinOut; + if (capeOut.alias == "cape") { + output.capes = QMap<QString, Cape>({{capeOut.alias, capeOut}}); + output.currentCape = capeOut.alias; + } + + output.validity = Katabasis::Validity::Certain; + return true; +} + bool parseMinecraftEntitlements(QByteArray & data, MinecraftEntitlement &output) { qDebug() << "Parsing Minecraft entitlements..."; #ifndef NDEBUG |