C / C++ / MFC

Re: Getting user input into a list control

25-Jun-08 3:52

For in-place editing, Steen Krogsgaard has given you the idea.

theCPkid wrote:
Second, I am wondering whether xml is the right way to store this data or do I have other options?

Well, that totally depends on your choice. You can put it in the registry as well. If it is in an XML or inf file, it becomes easily portable (if such a thing is desired).

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Steen Krogsgaard25-Jun-08 3:13

Steen Krogsgaard

25-Jun-08 3:13

Instead of using a list control, use a list-view control with LVS_EDITLABELS style set. See MSDN List-view control or LVS_EDITLABELS for details.

Cheers
Steen.

"Are you gonna check your makeup when you're done whining?" John Simmons, 05/31/2006
"Of course, the next day it automatically updates, and your quick'n'dirty patches cause the new binaries to segfault all over your linoleum. If only you'd had the source..." Shog, 10/18/2006
"One day I realized that sadness is just another word for not enough coffee" Wally, 10/18/2006

How to hide pw in C++ command line exe

Nandu_77b25-Jun-08 1:59

Re: How to hide pw in C++ command line exe

25-Jun-08 1:59

I want to write C++ executable (console application), which will prompt the user to enter user name and password. The problem I am facing is when the user enter his/her password it is visible, so how to hide the password entry. Which means user can enter the password but it should not be displayed in the console.

Can any once help to achieve this? (That is hiding the password entry when it prompts for pw)

Thanks,
Nandu

theCPkid25-Jun-08 2:11

theCPkid

25-Jun-08 2:11

In a console application, how are you obtaining the password from user? Use getch() to get the character and then do not display that character on screen or display '*' instead.
I did not exactly get your question. Blush | :O

the fruits of your success will be in direct ratio to the honesty and sincerity of your own efforts in keeping your own records, doing your own thinking and, reaching your own conclusions.
..surviving in autumn..in love with spring..

Re: How to hide pw in C++ command line exe

Rajesh R Subramanian25-Jun-08 2:51

Re: How to hide pw in C++ command line exe - source code

25-Jun-08 2:51

Can you show us your code?

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Nandu_77b25-Jun-08 3:07

Re: How to hide pw in C++ command line exe - source code

25-Jun-08 3:07

);
}

return retval;
}

/******************************************************************************/
/* Here's a Test Program */
/******************************************************************************/

int main()
{
//string value("just for fun");
string key = "TERADATA";
string username;
string password;
string cnfpassword;
ofstream myfile;

cout<<"Enter user name::";
cin>>username;

cout<<"Enter Password\n";
cout<<"NOTE:\n"<<"1) Password can be alphanumeric or numeric or alphabets\n"
<<"2) Blank spaces not allowed\n"<<"::";
cin>>password;

cout<<"Confirm Password::";
cin>>cnfpassword;

if (password.compare(cnfpassword) != 0)
{
cout<<"Sorry Password dose not match....try again"<<"\n";
return 1;
}
else
{
password=XOR(password,key);
}

cout<<"Encrypted Password ::"<<"\n";
cout<<password<<"\n\n";

myfile.open("Test_SSOpw.txt", ios::out);

if( !myfile )
cout<<"Error opening file";
else
{
myfile.write("#USERNAME#", 10);
myfile.write(username.c_str(), username.length());
myfile <<'\n';
myfile <<"#PASSWORD#"<<password;
myfile.close();
cout<<"Functional SSO password encryption success!!"<<'\n';
}

password=XOR(password,"TERADATA");
cout<<"Decrypted Password ::"<<password<<"\n";

getch();
return 0;
}

Nandu_77b25-Jun-08 3:31

Re: How to hide pw in C++ command line exe - source code

25-Jun-08 3:31

Below is the code

#include <iostream>
#include <fstream>
#include <string>
#include <conio.h>
using namespace std;

string XOR(string value,string key)
{
string retval(value);

short unsigned int klen=key.length();
short unsigned int vlen=value.length();
short unsigned int k=0;
short unsigned int v=0;

for(v;v<vlen;v++)
{
retval[v]=value[v]^key[k];
k=(++k<klen?k);
}

return retval;
}

/******************************************************************************/
/* Here's a Test Program */
/******************************************************************************/

int main()
{
//string value("just for fun");
string key = "TERADATA";
string username;
string password;
string cnfpassword;
ofstream myfile;

cout<<"Enter user name::";
cin>>username;

cout<<"Enter Password\n";
cout<<"NOTE:\n"<<"1) Password can be alphanumeric or numeric or alphabets\n"
<<"2) Blank spaces not allowed\n"<<"::";
cin>>password;

cout<<"Confirm Password::";
cin>>cnfpassword;

if (password.compare(cnfpassword) != 0)
{
cout<<"Sorry Password dose not match....try again"<<"\n";
return 1;
}
else
{
password=XOR(password,key);
}

cout<<"Encrypted Password ::"<<"\n";
cout<<password<<"\n\n";

myfile.open("Test_SSOpw.txt", ios::out);

if( !myfile )
cout<<"Error opening file";
else
{
myfile.write("#USERNAME#", 10);
myfile.write(username.c_str(), username.length());
myfile <<'\n';
myfile <<"#PASSWORD#"<<password;
myfile.close();
cout<<"Functional SSO password encryption success!!"<<'\n';
}

password=XOR(password,"TERADATA");
cout<<"Decrypted Password ::"<<password<<"\n";

getch();
return 0;
}

Rajesh R Subramanian25-Jun-08 3:43

Re: How to hide pw in C++ command line exe - source code

25-Jun-08 3:43

Nandu_77b wrote:
cin>>cnfpassword;

Use getc() in a while loop to get the password characters and display an asterisk with cout for each character.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Nandu_77b25-Jun-08 3:47

Re: How to hide pw in C++ command line exe - source code

25-Jun-08 3:47

I have tried with the below code, but I am getting some junk value in password.

int i = 0;
char ch;
char password[20];
do
{
ch = getch();
cerr<<"*";
password[i++] = ch;
}
while(ch != '\r');

Rajesh R Subramanian25-Jun-08 4:13

Re: How to hide pw in C++ command line exe - source code

25-Jun-08 4:13

This works for me:

std::string str;
char c;
cout<<"Please enter password:";
while(true)
{
   c = _getch();
   if(c == 32 || c == 13 || c == 27) 
      break; //Break on a space bar, return key or Esc key press.
   else
   {
      str += c;
      std::cout<<"*";
   }
}
//str has the password now.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Nandu_77b25-Jun-08 5:06

Problem writing in to a File

25-Jun-08 5:06

Thanks its working fine

sunny_vc25-Jun-08 1:53

25-Jun-08 1:53

Hi,
I am writing some character bytes in to File using
fprintf(fp,"%c",data);
if data is 26 then while reading it is read as -1,
if other than 26 it is able to read correctly.
What will be the problem?
Any idea?

Regards,
Sunil Kumar

toxcct25-Jun-08 2:17

toxcct

25-Jun-08 2:17

how is data populated ?
also, how do you read the file back ?

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sunny_vc25-Jun-08 2:23

25-Jun-08 2:23

Hi,
I read using
int c=getc(fp);
until I read the complete bytes.

Regards,
Sunil Kumar

toxcct25-Jun-08 2:24

toxcct

25-Jun-08 2:24

sunilkumar.d wrote:
Hi,
I read using
int c=getc(fp);
until I read the complete bytes.

thanks. and then i ask back my second question, which was :
how do you read back the file ?

just a guess. wouldn't it work better if you write (with fprintf() using the %d parameter rather than %c (as you're handling an int and not a char) ?

also, doesn't fscanf() work better than getc() ?

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Rajesh R Subramanian25-Jun-08 2:26

25-Jun-08 2:26

Well, good luck Tox. Big Grin | :-D

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

sunny_vc25-Jun-08 2:34

25-Jun-08 2:34

I did nt try that way.
Actually the code is already written.Now I am maintaining it.
So I did nt change it.

Regards,
Sunil Kumar

toxcct25-Jun-08 3:04

toxcct

25-Jun-08 3:04

please make tries and use your debugger...if you don't make tries, how can you tell what's wrong !

man, if you're on a maintenance team, it your every day job. you should already be able to have such reflex

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_AnsHUMAN_ 25-Jun-08 2:23

_AnsHUMAN_

25-Jun-08 2:23

Could this be related with ASCII value? 26 corresponds to substitute, so as toxcct says you would be having some problem with the way you read from the file.

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

sunny_vc25-Jun-08 2:29

25-Jun-08 2:29

Hi , thanks for the answer.
I am reading like

int c;
for(i=0;i<10;i++)
{
c=getc(fp)
char [i]=c;
}
If the charater is 26 then c will contain -1.

Regards,
Sunil Kumar

Rajesh R Subramanian25-Jun-08 2:41

25-Jun-08 2:41

sunilkumar.d wrote:
int c;
for(i=0;i<10;i++)
{
c=getc(fp)
char [i]=c;
}

Are you sure this is the code? It won't even compile.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

sunny_vc25-Jun-08 2:43

25-Jun-08 2:43

Sorry sir,
I just typed in correctly.

Regards,
Sunil Kumar