Open-source multiplayer game server compatible with the RuneScape client
https://www.openrs2.org/
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65 lines
2.2 KiB
65 lines
2.2 KiB
package org.openrs2.protocol.login.upstream
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import io.netty.buffer.ByteBuf
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import org.bouncycastle.crypto.params.RSAPrivateCrtKeyParameters
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import org.openrs2.buffer.readString
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import org.openrs2.buffer.use
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import org.openrs2.buffer.writeString
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import org.openrs2.crypto.Rsa
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import org.openrs2.crypto.StreamCipher
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import org.openrs2.crypto.rsa
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import org.openrs2.crypto.secureRandom
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import org.openrs2.protocol.VariableBytePacketCodec
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import org.openrs2.util.Base37
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import javax.inject.Inject
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import javax.inject.Singleton
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@Singleton
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public class CheckWorldSuitabilityCodec @Inject constructor(
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private val key: RSAPrivateCrtKeyParameters
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) : VariableBytePacketCodec<LoginRequest.CheckWorldSuitability>(
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type = LoginRequest.CheckWorldSuitability::class.java,
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opcode = 24
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) {
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override fun decode(input: ByteBuf, cipher: StreamCipher): LoginRequest.CheckWorldSuitability {
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val build = input.readShort().toInt()
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val ciphertextLen = input.readUnsignedByte().toInt()
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val ciphertext = input.readSlice(ciphertextLen)
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ciphertext.rsa(key).use { plaintext ->
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require(plaintext.readUnsignedByte().toInt() == Rsa.MAGIC) {
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"Invalid RSA magic"
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}
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plaintext.skipBytes(4)
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val username = Base37.decodeLowerCase(plaintext.readLong())
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plaintext.skipBytes(4)
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val password = plaintext.readString()
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plaintext.skipBytes(4)
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return LoginRequest.CheckWorldSuitability(build, username, password)
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}
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}
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override fun encode(input: LoginRequest.CheckWorldSuitability, output: ByteBuf, cipher: StreamCipher) {
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output.writeShort(input.build)
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output.alloc().buffer().use { plaintext ->
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plaintext.writeByte(Rsa.MAGIC)
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plaintext.writeInt(secureRandom.nextInt())
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plaintext.writeLong(Base37.encode(input.username))
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plaintext.writeInt(secureRandom.nextInt())
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plaintext.writeString(input.password)
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plaintext.writeInt(secureRandom.nextInt())
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plaintext.rsa(key).use { ciphertext ->
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output.writeByte(ciphertext.readableBytes())
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output.writeBytes(ciphertext)
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}
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}
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}
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}
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