Merge remote-tracking branch 'origin/master'

mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/QQAndroidBotNetworkHandler.kt

@@ -11,6 +11,8 @@ import net.mamoe.mirai.qqandroid.event.PacketReceivedEvent
 import net.mamoe.mirai.qqandroid.network.protocol.packet.KnownPacketFactories
 import net.mamoe.mirai.qqandroid.network.protocol.packet.OutgoingPacket
 import net.mamoe.mirai.qqandroid.network.protocol.packet.login.LoginPacket
+import net.mamoe.mirai.qqandroid.network.protocol.packet.login.LoginPacket.LoginPacketResponse.Captcha
+import net.mamoe.mirai.qqandroid.network.protocol.packet.login.LoginPacket.LoginPacketResponse.Success
 import net.mamoe.mirai.qqandroid.network.protocol.packet.login.SvcReqRegisterPacket
 import net.mamoe.mirai.utils.*
 import net.mamoe.mirai.utils.io.*
@@ -28,15 +30,23 @@ internal class QQAndroidBotNetworkHandler(bot: QQAndroidBot) : BotNetworkHandler
         channel.connect("113.96.13.208", 8080)
         launch(CoroutineName("Incoming Packet Receiver")) { processReceive() }
 
-        println("Sending login")
-        LoginPacket.SubCommand9(bot.client).sendAndExpect<LoginPacket.LoginPacketResponse>()
-        println("SessionTicket=${bot.client.wLoginSigInfo.wtSessionTicket.data.toUHexString()}")
+        bot.logger.info("Trying login")
+        when (val response = LoginPacket.SubCommand9(bot.client).sendAndExpect<LoginPacket.LoginPacketResponse>()) {
+            is Captcha -> when (response) {
+                is Captcha.Picture -> {
+                    bot.logger.info("需要图片验证码")
+                }
+                is Captcha.Slider -> {
+                    bot.logger.info("需要滑动验证码")
+                }
+            }
+
+            is Success -> {
+                bot.logger.info("Login successful")
+            }
+        }
+
         println("d2key=${bot.client.wLoginSigInfo.d2Key.toUHexString()}")
-        println("SessionTicketKey=${bot.client.wLoginSigInfo.wtSessionTicketKey.toUHexString()}")
-        println()
-        println()
-        println()
-        println("Sending ReqRegister")
         SvcReqRegisterPacket(bot.client).sendAndExpect<SvcReqRegisterPacket.Response>()
     }
 
@@ -118,7 +128,7 @@ internal class QQAndroidBotNetworkHandler(bot: QQAndroidBot) : BotNetworkHandler
      * 处理从服务器接收过来的包. 这些包可能是粘在一起的, 也可能是不完整的. 将会自动处理
      */
     @UseExperimental(ExperimentalCoroutinesApi::class)
-    internal suspend fun processPacket(rawInput: ByteReadPacket): Unit = rawInput.debugPrint("Received").let { input: ByteReadPacket ->
+    internal fun processPacket(rawInput: ByteReadPacket): Unit = rawInput.debugPrint("Received").let { input: ByteReadPacket ->
         if (input.remaining == 0L) {
             return
         }
@@ -168,10 +178,6 @@ internal class QQAndroidBotNetworkHandler(bot: QQAndroidBot) : BotNetworkHandler
                 }
             }
         }
-        if (input.remaining == 0L) {
-            bot.logger.error("Empty packet received. Consider if bad packet was sent.")
-            return
-        }
     }
 
 

mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/jce/RequestPacket.kt

@@ -3,6 +3,7 @@ package net.mamoe.mirai.qqandroid.network.protocol.jce
 import net.mamoe.mirai.qqandroid.network.io.JceInput
 import net.mamoe.mirai.qqandroid.network.io.JceOutput
 import net.mamoe.mirai.qqandroid.network.io.JceStruct
+import net.mamoe.mirai.utils.cryptor.contentToString
 
 private val EMPTY_MAP = mapOf<String, String>()
 
@@ -70,4 +71,8 @@ class RequestPacket() : JceStruct() {
         builder.write(this.context, 9)
         builder.write(this.status, 10)
     }
+
+    override fun toString(): String {
+        return this.contentToString()
+    }
 }
\ No newline at end of file

mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/PacketFactory.kt

@@ -4,6 +4,8 @@ import kotlinx.io.core.*
 import kotlinx.io.pool.useInstance
 import net.mamoe.mirai.data.Packet
 import net.mamoe.mirai.qqandroid.QQAndroidBot
+import net.mamoe.mirai.qqandroid.network.io.JceInput
+import net.mamoe.mirai.qqandroid.network.protocol.jce.RequestPacket
 import net.mamoe.mirai.qqandroid.network.protocol.packet.login.LoginPacket
 import net.mamoe.mirai.qqandroid.network.protocol.packet.login.SvcReqRegisterPacket
 import net.mamoe.mirai.utils.DefaultLogger
@@ -39,7 +41,7 @@ private suspend inline fun <P : Packet> PacketFactory<P>.decode(bot: QQAndroidBo
 
 internal val DECRYPTER_16_ZERO = ByteArray(16)
 
-internal typealias PacketConsumer = suspend (packet: Packet, packetId: String, ssoSequenceId: Int) -> Unit
+internal typealias PacketConsumer = suspend (packet: Packet, commandName: String, ssoSequenceId: Int) -> Unit
 
 @PublishedApi
 internal val PacketLogger: MiraiLogger = DefaultLogger("Packet")
@@ -76,7 +78,7 @@ internal object KnownPacketFactories : List<PacketFactory<*>> by mutableListOf(
             //
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
             val flag2 = readByte().toInt()
-            PacketLogger.verbose("包类型(flag2) = $flag2. (可能是 ${if (flag2 == 2) "sso" else "uni"})")
+            PacketLogger.verbose("包类型(flag2) = $flag2. (可能是 ${if (flag2 == 2) "OicqRequest" else "Uni"})")
 
             val flag3 = readByte().toInt()
             check(flag3 == 0) { "Illegal flag3. Expected 0, got $flag3" }
@@ -88,123 +90,158 @@ internal object KnownPacketFactories : List<PacketFactory<*>> by mutableListOf(
             ByteArrayPool.useInstance { data ->
                 val size = this.readAvailable(data)
 
-                (if (flag2 == 2) {
-                    PacketLogger.verbose("SSO, 尝试使用 16 zero 解密.")
-                    kotlin.runCatching {
+                kotlin.runCatching {
+                    // 快速解密
+                    if (flag2 == 2) {
+                        PacketLogger.verbose("SSO, 尝试使用 16 zero 解密.")
                         data.decryptBy(DECRYPTER_16_ZERO, size).also { PacketLogger.verbose("成功使用 16 zero 解密") }
-                    }
-                } else {
-                    PacketLogger.verbose("Uni, 尝试使用 d2Key 解密.")
-                    kotlin.runCatching {
+                    } else {
+                        PacketLogger.verbose("Uni, 尝试使用 d2Key 解密.")
                         data.decryptBy(bot.client.wLoginSigInfo.d2Key, size).also { PacketLogger.verbose("成功使用 d2Key 解密") }
                     }
-                }).getOrElse {
+                }.getOrElse {
+                    // 慢速解密
                     PacketLogger.verbose("失败, 尝试其他各种key")
-                    bot.client.tryDecryptOrNull(data) { it }
-                }?.toReadPacket()?.also { decryptedData ->
+                    bot.client.tryDecryptOrNull(data, size) { it }
+                }?.toReadPacket()?.let { decryptedData ->
+                    // 解析外层包装
                     when (flag1) {
-                        0x0A -> parseLoginSsoPacket(bot, decryptedData, consumer)
-                        0x0B -> parseUniPacket(bot, decryptedData, consumer)
+                        0x0A -> parseSsoFrame(bot, decryptedData)
+                        0x0B -> parseUniFrame(bot, decryptedData)
+                        else -> error("unknown flag1: ${flag1.toByte().toUHexString()}")
+                    }
+                }?.let {
+                    // 处理内层真实的包
+                    if (it.packetFactory == null) {
+                        return
+                    }
+
+                    when (flag2) {
+                        1 -> it.data.parseUniResponse(bot, it.packetFactory, it.sequenceId, consumer)
+                        2 -> it.data.parseOicqResponse(bot, it.packetFactory, it.sequenceId, consumer)
+                        else -> error("unknown flag2: $flag2. Body to be parsed for inner packet=${it.data.readBytes().toUHexString()}")
                     }
                 } ?: inline {
-                    PacketLogger.error("任何key都无法解密: ${data.toUHexString()}")
+                    // 无法解析
+                    PacketLogger.error("任何key都无法解密: ${data.take(size).toUHexString()}")
                     return
                 }
+
             }
         }
     }
 
     private inline fun <R> inline(block: () -> R): R = block()
 
-    private fun parseUniPacket(bot: QQAndroidBot, rawInput: ByteReadPacket, consumer: PacketConsumer) =
-        rawInput.debugIfFail("Login sso packet") {
+    private fun parseUniFrame(bot: QQAndroidBot, rawInput: ByteReadPacket): IncomingPacket =
+        rawInput.debugIfFail("uni packet") {
             readIoBuffer(readInt() - 4).withUse {
                 //00 01 4E 64 FF FF D8 E8 00 00 00 14 6E 65 65 64 20 41 32 20 61 6E 64 20 49 4D 45 49 00 00 00 04 00 00 00 08 60 7F B6 23 00 00 00 00 00 00 00 04
                 val sequenceId = readInt()
 
             }
 
+            // TODO: 2020/1/24
+
             readIoBuffer(readInt() - 4).withUse {
                 debugPrintln("收到 UniPacket 的 body=${this.readBytes().toUHexString()}")
             }
+            return IncomingPacket(null, 0, TODO())
         }
 
-    @UseExperimental(ExperimentalUnsignedTypes::class)
-    private suspend fun parseLoginSsoPacket(bot: QQAndroidBot, rawInput: ByteReadPacket, consumer: PacketConsumer) =
-        rawInput.debugIfFail("Login sso packet") {
-            val commandName: String
-            val ssoSequenceId: Int
-            readIoBuffer(readInt() - 4).withUse {
-                ssoSequenceId = readInt()
-                PacketLogger.verbose("sequenceId = $ssoSequenceId")
-                check(readInt() == 0)
-                val extraData = readIoBuffer(readInt() - 4)
-                PacketLogger.verbose("sso(inner)extraData = $extraData")
-
-                commandName = readString(readInt() - 4)
-                val unknown = readBytes(readInt() - 4)
-                if (unknown.toInt() != 0x02B05B8B) DebugLogger.debug("got new unknown: ${unknown.toUHexString()}")
-
-                check(readInt() == 0)
-            }
+    class IncomingPacket(
+        val packetFactory: PacketFactory<*>?,
+        val sequenceId: Int,
+        val data: ByteReadPacket
+    )
 
-            bot.logger.verbose(commandName)
+    /**
+     * 解析 SSO 层包装
+     */
+    @UseExperimental(ExperimentalUnsignedTypes::class)
+    private fun parseSsoFrame(bot: QQAndroidBot, input: ByteReadPacket): IncomingPacket {
+        val commandName: String
+        val ssoSequenceId: Int
+
+        // head
+        input.readIoBuffer(input.readInt() - 4).withUse {
+            ssoSequenceId = readInt()
+            PacketLogger.verbose("sequenceId = $ssoSequenceId")
+            check(readInt() == 0)
+            val extraData = readBytes(readInt() - 4)
+            PacketLogger.verbose("sso(inner)extraData = ${extraData.toUHexString()}")
+
+            commandName = readString(readInt() - 4)
+            val unknown = readBytes(readInt() - 4)
+            if (unknown.toInt() != 0x02B05B8B) DebugLogger.debug("got new unknown: ${unknown.toUHexString()}")
+
+            check(readInt() == 0)
+        }
 
-            // TODO: 2020/1/23 在这里处理 Uni 解析
-            val packetFactory = findPacketFactory(commandName)
+        // body
+        // TODO: 2020/1/23 在这里处理 Uni 解析
+        val packetFactory = findPacketFactory(commandName)
 
-            if (packetFactory == null) {
-                bot.logger.warning("找不到包 PacketFactory")
-                PacketLogger.verbose("传递给 PacketFactory 的数据 = ${this.readBytes().toUHexString()}")
-                return
-            }
+        bot.logger.verbose(commandName)
+        if (packetFactory == null) {
+            bot.logger.warning("找不到包 PacketFactory")
+            PacketLogger.verbose("传递给 PacketFactory 的数据 = ${input.readBytes().toUHexString()}")
+        }
+        return IncomingPacket(packetFactory, ssoSequenceId, input)
+    }
 
-            val qq: Long
-            val subCommandId: Int
-            readIoBuffer(readInt() - 4).withUse {
-                check(readByte().toInt() == 2)
-                this.discardExact(2) // 27 + 2 + body.size
-                this.discardExact(2) // const, =8001
-                this.readUShort() // commandId
-                this.readShort() // const, =0x0001
-                qq = this.readUInt().toLong()
-                val encryptionMethod = this.readUShort().toInt()
-
-                this.discardExact(1) // const = 0
-                val packet = when (encryptionMethod) {
-                    4 -> { // peer public key, ECDH
-                        var data = this.decryptBy(bot.client.ecdh.keyPair.shareKey, this.readRemaining - 1)
-
-                        val peerShareKey = bot.client.ecdh.calculateShareKeyByPeerPublicKey(readUShortLVByteArray().adjustToPublicKey())
-                        data = data.decryptBy(peerShareKey)
-
-                        packetFactory.decode(bot, data.toReadPacket())
-                    }
-                    0 -> {
-                        val data = if (bot.client.loginState == 0) {
-                            ByteArrayPool.useInstance { byteArrayBuffer ->
-                                val size = this.readRemaining - 1
-                                this.readFully(byteArrayBuffer, 0, size)
-
-                                runCatching {
-                                    byteArrayBuffer.decryptBy(bot.client.ecdh.keyPair.shareKey, size)
-                                }.getOrElse {
-                                    byteArrayBuffer.decryptBy(bot.client.randomKey, size)
-                                } // 这里实际上应该用 privateKey(另一个random出来的key)
-                            }
-                        } else {
-                            this.decryptBy(bot.client.randomKey, 0, this.readRemaining - 1)
+    private suspend fun ByteReadPacket.parseOicqResponse(bot: QQAndroidBot, packetFactory: PacketFactory<*>, ssoSequenceId: Int, consumer: PacketConsumer) {
+        val qq: Long
+        readIoBuffer(readInt() - 4).withUse {
+            check(readByte().toInt() == 2)
+            this.discardExact(2) // 27 + 2 + body.size
+            this.discardExact(2) // const, =8001
+            this.readUShort() // commandId
+            this.readShort() // const, =0x0001
+            qq = this.readUInt().toLong()
+            val encryptionMethod = this.readUShort().toInt()
+
+            this.discardExact(1) // const = 0
+            val packet = when (encryptionMethod) {
+                4 -> { // peer public key, ECDH
+                    var data = this.decryptBy(bot.client.ecdh.keyPair.shareKey, this.readRemaining - 1)
+
+                    val peerShareKey = bot.client.ecdh.calculateShareKeyByPeerPublicKey(readUShortLVByteArray().adjustToPublicKey())
+                    data = data.decryptBy(peerShareKey)
+
+                    packetFactory.decode(bot, data.toReadPacket())
+                }
+                0 -> {
+                    val data = if (bot.client.loginState == 0) {
+                        ByteArrayPool.useInstance { byteArrayBuffer ->
+                            val size = this.readRemaining - 1
+                            this.readFully(byteArrayBuffer, 0, size)
+
+                            runCatching {
+                                byteArrayBuffer.decryptBy(bot.client.ecdh.keyPair.shareKey, size)
+                            }.getOrElse {
+                                byteArrayBuffer.decryptBy(bot.client.randomKey, size)
+                            } // 这里实际上应该用 privateKey(另一个random出来的key)
                         }
+                    } else {
+                        this.decryptBy(bot.client.randomKey, 0, this.readRemaining - 1)
+                    }
 
-                        packetFactory.decode(bot, data.toReadPacket())
+                    packetFactory.decode(bot, data.toReadPacket())
 
-                    }
-                    else -> error("Illegal encryption method. expected 0 or 4, got $encryptionMethod")
                 }
-
-                consumer(packet, packetFactory.commandName, ssoSequenceId)
+                else -> error("Illegal encryption method. expected 0 or 4, got $encryptionMethod")
             }
+
+            consumer(packet, packetFactory.commandName, ssoSequenceId)
         }
+    }
+
+    private suspend fun ByteReadPacket.parseUniResponse(bot: QQAndroidBot, packetFactory: PacketFactory<*>, ssoSequenceId: Int, consumer: PacketConsumer) {
+        val uni = RequestPacket.newInstanceFrom(JceInput(readIoBuffer(readInt() - 4)))
+        PacketLogger.verbose(uni.toString())
+        consumer(packetFactory.decode(bot, uni.sBuffer.toReadPacket()), uni.sServantName + "." + uni.sFuncName, ssoSequenceId)
+    }
 }
 
 @UseExperimental(ExperimentalContracts::class)

mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/login/LoginPacket.kt

@@ -172,6 +172,15 @@ internal object LoginPacket : PacketFactory<LoginPacket.LoginPacketResponse>("wt
 
     sealed class LoginPacketResponse : Packet {
         object Success : LoginPacketResponse()
+        sealed class Captcha : LoginPacketResponse() {
+            class Slider(
+                val data: IoBuffer
+            ) : Captcha()
+
+            class Picture(
+                val data: IoBuffer
+            ) : Captcha()
+        }
     }
 
     @UseExperimental(MiraiDebugAPI::class)

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/utils/io/ByteArrayUtil.kt

@@ -11,6 +11,27 @@ import kotlin.contracts.contract
 import kotlin.jvm.JvmOverloads
 import kotlin.jvm.JvmSynthetic
 
+
+@JvmOverloads
+@Suppress("DuplicatedCode") // false positive. foreach is not common to UByteArray and ByteArray
+@UseExperimental(ExperimentalUnsignedTypes::class)
+fun List<Byte>.toUHexString(separator: String = " ", offset: Int = 0, length: Int = this.size - offset): String {
+    if (length == 0) {
+        return ""
+    }
+    val lastIndex = offset + length
+    return buildString(length * 2) {
+        this@toUHexString.forEachIndexed { index, it ->
+            if (index in offset until lastIndex) {
+                var ret = it.toUByte().toString(16).toUpperCase()
+                if (ret.length == 1) ret = "0$ret"
+                append(ret)
+                if (index < lastIndex - 1) append(separator)
+            }
+        }
+    }
+}
+
 @JvmOverloads
 @Suppress("DuplicatedCode") // false positive. foreach is not common to UByteArray and ByteArray
 @UseExperimental(ExperimentalUnsignedTypes::class)