Re: Get ASCII value for character when higher than 127
- From: ssetz@xxxxxx
- Date: 29 May 2007 01:17:47 -0700
Pfew, had no idea this thread would grow this big over a weekend ;-)
First, let me explain once more that I really don't know much about C+
+. I would prefer to not write this thing at all, but I'm afraid I
have to. And there's no way I can do it in C# unfortunately. Also is
this the first time I have to do something with character encoding, so
that doesn't help
The reason I want to store the int-values for the characters in stead
of the characters themselves is that I need to load the output in a C#
Windows Service, that will process the passwords further. Since I
store in a textfile, I was afraid that I would lose information, since
those characters with value higher than 127 don't show up in a text
file.
I also imagined, that if I have the int value, I can perform some
actions on those int values to have some sort of encryption (add some
numbers, multiply the number, etc)
I want my passwordfilter to be as small as possible, so the chance on
errors, memory leaks, etc is as small as possible. The filter will
eventually have to be installed on our Domain Controllers and we don't
want to hang them up or anything. Therefor I don't want to use any
encryption library, other third party code, etc.
So, my goal is to get an output (that is not readable at first glance)
that I can read in C# to further process the passwords and store them
well encrypted in a database.
But, I do get what you mean. I will first focus on what C# wants for
input to retrieve the special characters, than I will try to create
that input with C++.
Sorry for all these questions, but I really don't see me getting this
filter working on my own. So far, all the help is great, it really
helps me!!!!
Thanks,
Sandra
On 28 mei, 17:04, "Ben Voigt" <r...@xxxxxxxxxxxxx> wrote:
You're comparing a standard encoding (UTF-8), capable of storing *any*
character, to a useless encoding of your own choosing. What will you do
with a password containing Chinese characters? UTF-8 will handle it.
Stop trying to evaluate the stored data based on your expectations (should
be), and start evaluating it based on your requirements (should do). Can it
be decoded back to the original password? Does it store the password
efficiently? With UTF-8, the answer is yes and yes. Do you have a
requirement for compatibility with some other software? If so, you need to
tell us that.
<s...@xxxxxx> wrote in message
news:1180094193.382198.13330@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On 24 mei, 17:14, "Ben Voigt" <r...@xxxxxxxxxxxxx> wrote:
Instead of wcstombs, use WideCharToMultiByte and CP_UTF8
Also write the UTF byte order mark to the beginning of the file, so it
will
be decoded correctly by other programs (eg Notepad)
Thanks, this helped me further a bit. But I'm still not able to get
the correct int value for the special characters. For example, when I
reset a users password to the following:
éAbc1fëp$%^
The int values that are written to my textfile for the password file
are:
0-61-0-87-0065-0098-0099-0049-0-58--110-0-61-0-85-0112-
And this should be:
0130-0065-0098-0099-0049-0159-0137-0112-0036-0037-0094-
Any idea what it is I'm still doing wrong? My code now looks like
below.
Thanks again,
Sandra
=========================================================
#include <windows.h>
#include <ntsecapi.h>
#include <time.h>
#include <fstream>
#include <iostream>
#include "PwdHookNew.h"
#include <sstream>
#include <string>
#include <iomanip>
#include <lm.h>
using namespace std;
#ifndef STATUS_SUCCESS
#define STATUS_SUCCESS ((NTSTATUS)0x00000000L)
#endif
string GetASCIIString(string oristring)
{
bool test = true;
int i, k;
string numstrings;
ostringstream oss;
for(i=0;i<oristring.size();i++)
{
k = int(oristring[i]);
oss << setw(4) << setfill('0') << k << '-';}
numstrings=oss.str();
oss.clear();
return numstrings;
}
NTSTATUS
NTAPI
PasswordChangeNotify(
PUNICODE_STRING UserName,
ULONG RelativeId,
PUNICODE_STRING Password
)
{
// ******************************************
// *** get filename ***
// ******************************************
const char* timeStringFormat = "%Y-%m-%d_%H-%M-%S";
const int timeStringLength = 20;
char timeString[timeStringLength];
time_t t = time(0);
tm *curTime = localtime(&t);
strftime(timeString, timeStringLength, timeStringFormat, curTime);
char path[80];
strcpy (path,"C:\\pwds\\");
strcat (path,timeString);
strcat (path,".txt");
// *******************************
// *** get pwd and user string ***
// *******************************
char *usernameStr, *passwordStr;
usernameStr = (char*)calloc(1, (UserName->Length/2)+1);
passwordStr = (char*)calloc(1, (Password->Length/2)+1);
WideCharToMultiByte(
CP_UTF8, 0, UserName->Buffer, -1,
usernameStr, (UserName->Length/2), NULL,
NULL );
WideCharToMultiByte(
CP_UTF8, 0, Password->Buffer, -1,
passwordStr, (Password->Length/2), NULL,
NULL );
char xmlmsg[200];
strcpy (xmlmsg,"<userpwd><username>");
strcat (xmlmsg,usernameStr);
strcat (xmlmsg,"</username><password>");
strcat (xmlmsg,passwordStr);
strcat (xmlmsg,"</password></userpwd>");
string asciiString = GetASCIIString(xmlmsg);
// ********************
// *** write output ***
// ********************
fstream outPwd(path, ios::app);
if (!outPwd)
{
fstream outPwd(path, ios::out );
}
outPwd << asciiString;
outPwd.close();
return STATUS_SUCCESS;
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