Post: Canonical Hash String [C#/VB.NET/C++]
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02-11-2016, 07:55 PM
#1
Sonoro
I like anteaters
The game uses this method to hash data such as dvar names and script function names. :laim:
C#
internal unsafe static int CanonicalHash(string fname)
{
string x = fname + "\0";
fixed(char* c = x)
{
int hash = (char.ToLower(*c) ^ 0x4B9ACE2F) * 0x1000193;
for (int z = 1; z < x.Length; z++)
hash = (char.ToLower(x[z]) ^ hash) * 0x1000193;
return hash;
}
return 0;
}
VB
Friend Shared Function CanonicalHash(fname As String) As Integer
Dim x As String = fname & Convert.ToString(vbNullChar)
Dim hash As Integer = (Char.ToLower(c.Target) Xor &H4b9ace2f) * &H1000193
For z As Integer = 1 To x.Length - 1
hash = (Char.ToLower(x(z)) Xor hash) * &H1000193
Next
Return hash
Return 0
End Function
C++
int CanonicalHash(const char* str)
{
int hash = (tolower(*str) ^ 0x4B9ACE2F) * 0x1000193;
for (size_t i = 1; i <= strlen(str); i++)
hash = (tolower(str[i]) ^ hash) * 0x1000193;
return hash;
}
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02-12-2016, 09:29 AM
#2
Python
Bebe Snek
Originally posted by xSonoro
This is the method that Black Ops 3 engine uses to hash strings in the game.
The game uses this method to hash data such as dvar names and script function names.
C#
VB
C++
The game uses this method to hash data such as dvar names and script function names.
C#
internal unsafe static int CanonicalHash(string fname)
{
string x = fname + "\0";
fixed(char* c = x)
{
int hash = (char.ToLower(*c) ^ 0x4B9ACE2F) * 0x1000193;
for (int z = 1; z < x.Length; z++)
hash = (char.ToLower(x[z]) ^ hash) * 0x1000193;
return hash;
}
return 0;
}
VB
Friend Shared Function CanonicalHash(fname As String) As Integer
Dim x As String = fname & Convert.ToString(vbNullChar)
Dim hash As Integer = (Char.ToLower(c.Target) Xor &H4b9ace2f) * &H1000193
For z As Integer = 1 To x.Length - 1
hash = (Char.ToLower(x(z)) Xor hash) * &H1000193
Next
Return hash
Return 0
End Function
C++
int CanonicalHash(const char* str)
{
int hash = (tolower(*str) ^ 0x4B9ACE2F) * 0x1000193;
for (size_t i = 1; i <= strlen(str); i++)
hash = (tolower(str[i]) ^ hash) * 0x1000193;
return hash;
}
Reply
02-12-2016, 09:31 AM
#3
OfficialJesseP
It is what it is.
Originally posted by xSonoro
This is the method that Black Ops 3 engine uses to hash strings in the game.
The game uses this method to hash data such as dvar names and script function names.
C#
VB
C++
The game uses this method to hash data such as dvar names and script function names.
C#
internal unsafe static int CanonicalHash(string fname)
{
string x = fname + "\0";
fixed(char* c = x)
{
int hash = (char.ToLower(*c) ^ 0x4B9ACE2F) * 0x1000193;
for (int z = 1; z < x.Length; z++)
hash = (char.ToLower(x[z]) ^ hash) * 0x1000193;
return hash;
}
return 0;
}
VB
Friend Shared Function CanonicalHash(fname As String) As Integer
Dim x As String = fname & Convert.ToString(vbNullChar)
Dim hash As Integer = (Char.ToLower(c.Target) Xor &H4b9ace2f) * &H1000193
For z As Integer = 1 To x.Length - 1
hash = (Char.ToLower(x(z)) Xor hash) * &H1000193
Next
Return hash
Return 0
End Function
C++
int CanonicalHash(const char* str)
{
int hash = (tolower(*str) ^ 0x4B9ACE2F) * 0x1000193;
for (size_t i = 1; i <= strlen(str); i++)
hash = (tolower(str[i]) ^ hash) * 0x1000193;
return hash;
}
Very useful release Sonoro. I'm interested to see where this goes from here
02-13-2016, 04:59 PM
#7
Bitwise
Mario!
Originally posted by SC58
The function name is called 'SL_GetCanonicalString'
Lol, no sir that is a function that is present within the BO series, the algorithm is real and has a usage outside of call of duty (like all cryptography does), my reversing is not from that function either, a secondary function exists to be used within the DemonWare class for a secondary usage (client -> server), it also is a re-written version with optimised code. Good to see you're still on here though, lol.
02-13-2016, 05:01 PM
#8
SC58
Former Staff
Originally posted by Bitwise
Lol, no sir that is a function that is present within the BO series, the algorithm is real and has a usage outside of call of duty (like all cryptography does), my reversing is not from that function either, a secondary function exists to be used within the DemonWare class for a secondary usage (client -> server), it also is a re-written version with optimised code. Good to see you're still on here though, lol.
good to see u here wanting credit lol
btw that function is in every cod :p
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02-13-2016, 05:32 PM
#10
Bitwise
Mario!
Originally posted by SC58
good to see u here wanting credit lol
btw that function is in every cod :p
btw that function is in every cod :p
I don't want credit, I gave it to the owner of the 7s thread for that purpose; the credited source would be 7s, not me. I never stated it wasn't in every cod, why do you have to keep trying to out-do people when all your "research" is nothing but pseudo code from PDB's and PC, lmao.
Originally posted by Sabotage
Bitwise is one hell of a guy...
Indeed, indeed.
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