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decryptpayload to work on negative memory addr

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minjaesong
2025-04-30 19:52:43 +09:00
parent 8f6e433f30
commit 50b3993f44
3 changed files with 11 additions and 5 deletions
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13
tsvm_core/src/net/torvald/tsvm/VMJSR223Delegate.kt
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@@ -267,15 +267,18 @@ class VMJSR223Delegate(private val vm: VM) {
}
fun toObjectCode(ptr: Int): java.lang.String {
val payloadSize = peek(ptr+1).shl(16) or peek(ptr+2).shl(8) or peek(ptr+3)
val payloadSize = if (ptr >= 0)
peek(ptr+1).shl(16) or peek(ptr+2).shl(8) or peek(ptr+3)
else
peek(ptr-1).shl(16) or peek(ptr-2).shl(8) or peek(ptr-3)
val decrypted = decryptPayload(ptr, payloadSize)
val decrypted = decryptPayload(ptr, payloadSize, (ptr < 0))
val image = CompressorDelegate.decomp(decrypted)
return java.lang.String(image)
}
private fun decryptPayload(ptr: Int, payloadSize: Int): ByteArray {
private fun decryptPayload(ptr: Int, payloadSize: Int, dec: Boolean): ByteArray {
var key = "00"
var keyBytes = byteArrayOf(0x00)
var keyCursor = 0
@@ -313,7 +316,9 @@ class VMJSR223Delegate(private val vm: VM) {
val encrypted = ByteArray(payloadSize)
for (outcnt in 0 until payloadSize) {
encrypted[outcnt] = (peek(ptr + 4 + outcnt) xor keyBytes[keyCursor++].toUint()).toByte()
encrypted[outcnt] = ((
if (!dec) peek(ptr + 4 + outcnt) else peek(ptr - 4 - outcnt))
xor keyBytes[keyCursor++].toUint()).toByte()
if (keyCursor >= keyBytes.size) {
getNewKeySeq()
}

1
tsvm_core/src/net/torvald/tsvm/peripheral/VMProgramRom.kt
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File diff suppressed because one or more lines are too long

2
tsvm_executable/src/net/torvald/tsvm/AppLoader.java
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@@ -44,7 +44,7 @@ public class AppLoader {
// VM vm = new VM("./assets", 64 << 10, new TheRealWorld(), new VMProgramRom[]{TandemBios.INSTANCE, BasicRom.INSTANCE}, 2, watchdogs);
// VM vm = new VM("./assets", 128 << 10, new TheRealWorld(), new VMProgramRom[]{BasicBios.INSTANCE, WPBios.INSTANCE}, 2, watchdogs);
// VM vm = new VM("./assets", 8192 << 10, new TheRealWorld(), new VMProgramRom[]{TsvmBios.INSTANCE}, 8, watchdogs);
VM vm = new VM("./assets", 8192 << 10, new TheRealWorld(), new VMProgramRom[]{Mon.INSTANCE}, 8, watchdogs);
VM vm = new VM("./assets", 8192 << 10, new TheRealWorld(), new VMProgramRom[]{Mon.INSTANCE, HyveRom.INSTANCE}, 8, watchdogs);
// VM vm = new VM("./assets", 8192 << 10, new TheRealWorld(), new VMProgramRom[]{OpenBios.INSTANCE}, 8, watchdogs);
// VM pipvm = new VM("./assets", 4096, new TheRealWorld(), new VMProgramRom[]{PipBios.INSTANCE, PipROM.INSTANCE}, 8, watchdogs);