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83 lines (73 loc) · 2.73 KB
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using System;
using System.Linq;
using Process.NET.Modules;
namespace Process.NET.Patterns
{
public class PatternScanner : IPatternScanner
{
private readonly IProcessModule _module;
public PatternScanner(IProcessModule module)
{
_module = module;
Data = module.Read(0, _module.Size);
}
public byte[] Data { get; }
public PatternScanResult Find(IMemoryPattern pattern)
{
return pattern.PatternType == MemoryPatternType.Function
? FindFunctionPattern(pattern)
: FindDataPattern(pattern);
}
private PatternScanResult FindFunctionPattern(IMemoryPattern pattern)
{
var patternData = Data;
var patternDataLength = patternData.Length;
for (var offset = 0; offset < patternDataLength; offset++)
{
if (
pattern.GetMask()
.Where((m, b) => m == 'x' && pattern.GetBytes()[b] != patternData[b + offset])
.Any())
continue;
return new PatternScanResult
{
BaseAddress = _module.BaseAddress + offset,
ReadAddress = _module.BaseAddress + offset,
Offset = offset,
Found = true
};
}
return new PatternScanResult
{
BaseAddress = IntPtr.Zero,
ReadAddress = IntPtr.Zero,
Offset = 0,
Found = false
};
}
private PatternScanResult FindDataPattern(IMemoryPattern pattern)
{
var patternData = Data;
var patternBytes = pattern.GetBytes();
var patternMask = pattern.GetMask();
var result = new PatternScanResult();
for (var offset = 0; offset < patternData.Length; offset++)
{
if (patternMask.Where((m, b) => m == 'x' && patternBytes[b] != patternData[b + offset]).Any())
continue;
// If this area is reached, the pattern has been found.
result.Found = true;
result.ReadAddress = _module.Read<IntPtr>(offset + pattern.Offset);
result.BaseAddress = new IntPtr(result.ReadAddress.ToInt64() - _module.BaseAddress.ToInt64());
result.Offset = offset;
return result;
}
// If this is reached, the pattern was not found.
result.Found = false;
result.Offset = 0;
result.ReadAddress = IntPtr.Zero;
result.BaseAddress = IntPtr.Zero;
return result;
}
}
}