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refactor and add error handling

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This commit is contained in:
Akash Mozumdar 2020-08-12 03:29:18 -06:00
parent 39b0882bbf
commit b4303e4d4d
1 changed files with 18 additions and 22 deletions
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40
texthook/engine/engine.cc
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@ -6672,6 +6672,8 @@ bool InsertNitroplusHook()
namespace TokyoNecro { namespace TokyoNecro {
const BYTE funcSig[] = { 0x55, 0x8b, 0xec };
bool TextHook() { bool TextHook() {
const BYTE bytecodes[] = { const BYTE bytecodes[] = {
@ -6679,18 +6681,18 @@ bool TextHook() {
0x8D, 0x75, 0xD8, // 8D 75 D8 - lea esi,[ebp-28] 0x8D, 0x75, 0xD8, // 8D 75 D8 - lea esi,[ebp-28]
0xE8, 0x6C, 0xE1, 0xF4, 0xFF, // E8 6CE1F4FF - call TokyoNecro.exe+35E0 0xE8, 0x6C, 0xE1, 0xF4, 0xFF, // E8 6CE1F4FF - call TokyoNecro.exe+35E0
}; };
ULONG range = min(processStopAddress - processStartAddress, MAX_REL_ADDR); ULONG addr = MemDbg::findBytes(bytecodes, sizeof(bytecodes), processStartAddress, processStopAddress);
ULONG addr = if (addr == 0) {
MemDbg::findBytes(bytecodes, sizeof(bytecodes), processStartAddress, ConsoleOutput("Textractor:TokyoNecro: pattern not found");
processStartAddress + range);
if (addr == 0ull) {
ConsoleOutput("vnreng:TokyoNecro: pattern not found");
return false; return false;
} }
// Look for the start of the function // Look for the start of the function
const ULONG function_start = MemDbg::findEnclosingAlignedFunction(addr); const ULONG function_start = MemDbg::findEnclosingAlignedFunction(addr);
if (memcmp((void*)function_start, funcSig, sizeof(funcSig)) != 0) {
ConsoleOutput("Textractor: TokyoNecro: function start not found");
return false;
}
HookParam hp = {}; HookParam hp = {};
hp.address = function_start; hp.address = function_start;
@ -6701,10 +6703,8 @@ bool TextHook() {
// using the data in the registers // using the data in the registers
hp.offset = 0x4; hp.offset = 0x4;
hp.type = USING_STRING; hp.type = USING_STRING;
ConsoleOutput("Textractor: INSERT TokyoNecroText");
NewHook(hp, "TokyoNecroText"); NewHook(hp, "TokyoNecroText");
ConsoleOutput("vnreng: INSERT TokyoNecroText");
return true; return true;
} }
@ -6752,27 +6752,25 @@ bool DatabaseHook()
0x8D, 0x75, 0xD8, // 8D 75 D8 - lea esi,[ebp-28] 0x8D, 0x75, 0xD8, // 8D 75 D8 - lea esi,[ebp-28]
0xE8, 0x0C, 0xE2, 0xF4, 0xFF, // E8 6CE1F4FF - call TokyoNecro.exe+35E0 0xE8, 0x0C, 0xE2, 0xF4, 0xFF, // E8 6CE1F4FF - call TokyoNecro.exe+35E0
}; };
ULONG range = min(processStopAddress - processStartAddress, MAX_REL_ADDR); ULONG addr = MemDbg::findBytes(bytecodes, sizeof(bytecodes), processStartAddress, processStopAddress);
ULONG addr = if (addr == 0) {
MemDbg::findBytes(bytecodes, sizeof(bytecodes), processStartAddress,
processStartAddress + range);
if (addr == 0ull) {
ConsoleOutput("vnreng:TokyoNecro: pattern not found"); ConsoleOutput("vnreng:TokyoNecro: pattern not found");
return false; return false;
} }
// Look for the start of the function // Look for the start of the function
const ULONG function_start = MemDbg::findEnclosingAlignedFunction(addr); const ULONG function_start = MemDbg::findEnclosingAlignedFunction(addr);
if (memcmp((void*)function_start, funcSig, sizeof(funcSig)) != 0) {
ConsoleOutput("Textractor: TokyoNecro: function start not found");
return false;
}
HookParam hp = {}; HookParam hp = {};
hp.address = function_start; hp.address = function_start;
hp.offset = 0x4; hp.offset = 0x4;
hp.type = USING_STRING; hp.type = USING_STRING;
NewHook(hp, "TokyoNecroDatabase"); NewHook(hp, "TokyoNecroDatabase");
ConsoleOutput("vnreng: INSERT TokyoNecroDatabase"); ConsoleOutput("vnreng: INSERT TokyoNecroDatabase");
return true; return true;
} }
@ -6780,10 +6778,8 @@ bool DatabaseHook()
bool InsertTokyoNecroHook() bool InsertTokyoNecroHook()
{ {
bool result = TokyoNecro::TextHook(); TokyoNecro::DatabaseHook();
result = TokyoNecro::DatabaseHook() || result; return TokyoNecro::TextHook();
return result;
} }
// jichi 6/21/2015 // jichi 6/21/2015