Looking for C# code that can do an equivalent calculation
on MSIL code.
Assuming type in memory and some arbitrary assumptions
about public/nonpublic and instance/static maybe something
like:
public class TypeChecksum
{
private static string Signature(string name, ParameterInfo[] allpi)
{
StringBuilder sb = new StringBuilder();
sb.Append(name);
sb.Append("(");
bool first = true;
foreach(ParameterInfo pi in allpi)
{
if(first)
{
first = false;
}
else
{
sb.Append(",");
}
sb.Append(pi.ParameterType.ToString());
sb.Append(" ");
sb.Append(pi.Name);
}
sb.Append(")");
return sb.ToString();
}
private static SHA256 sha = new SHA256Managed();
public static long Calculate(Type t)
{
MemoryStream ms = new MemoryStream();
BinaryWriter bw = new BinaryWriter(ms);
bw.Write(t.FullName);
bw.Write((int)t.Attributes);
foreach(FieldInfo fi in t.GetFields(BindingFlags.Public |
BindingFlags.NonPublic | BindingFlags.Instance).OrderBy(f => f.Name))
{
bw.Write(fi.Name);
bw.Write((int)fi.Attributes);
}
foreach(PropertyInfo pi in
t.GetProperties(BindingFlags.Public | BindingFlags.Instance).OrderBy(p
=> p.Name))
{
bw.Write(pi.Name);
bw.Write((int)pi.Attributes);
}
foreach(ConstructorInfo ci in
t.GetConstructors(BindingFlags.Public | BindingFlags.Instance).OrderBy(c
=> Signature(c.Name, c.GetParameters())))
{
bw.Write(Signature(ci.Name, ci.GetParameters()));
bw.Write((int)ci.Attributes);
}
foreach(MethodInfo mi in t.GetMethods(BindingFlags.Public |
BindingFlags.Instance | BindingFlags.Static).OrderBy(m =>
Signature(m.Name, m.GetParameters())))
{
bw.Write(Signature(mi.Name, mi.GetParameters()));
bw.Write((int)mi.Attributes);
}
bw.Close();
ms.Close();
byte[] b = ms.ToArray();
byte[] hash = sha.TransformFinalBlock(b, 0, b.Length);
return (((long)hash[0]) << 56) | (((long)hash[1]) << 48) |
(((long)hash[2]) << 40) | (((long)hash[3]) << 32)
| (((long)hash[4]) << 24) | (((long)hash[5]) << 16) |
(((long)hash[6]) << 8) | (((long)hash[7]) << 0);
}
}
Changing public/nonpublic and instance/static is easy.
If you need to read the MSIL from an assembly we may need to look at
something like Cecil.
Arne
