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Password program in C (masking characters)
Posted Date:
Total Responses: 0
Posted By: Pratik Pansare Member Level: Gold Points/Cash: 6
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/*This program takes a username and password with programmer defined masking characters.
char* getData(char*,unsigned int,char);
Pass the character array where you want to store the password as first parameter.
The second parameter being the size of the array.
And the third parameter is the masking character for your password put 0 in case if you don't want your password to be masked.
This method also provides auto stop when your array reaches it maximum length it waits and does not take any more input from the user, it wait for the enter key or the backspace key to be pressed by the user just like a text box in html.
*/
#include
#include
#include
char* getData(char*,unsigned int,char);
void main()
{
char uname[20], pass[20];
clrscr();
printf("Enter username: ");
getData(uname,sizeof(uname),0);
printf("Enter password: ");
getData(pass,sizeof(pass),'#');
printf("\n\nUsername: %s & Password: %s",uname,pass);
getch();
}
char* getData(char *string,unsigned int size,char mask)
{
char ch=0;
int pos=0;
while(1)
{
ch = getch();
if(ch==13) //For enter key
{
*(string + pos) = '\0';
break;
}
else if(pos==size-1 || ch==27)
{
continue;
}
else if(ch==8 && pos>0)
{
printf("\b");
if(mask==0)
{
printf("%c",*(string + pos));
printf("\b ");
}
else
{
printf("%c",mask);
printf("\b ");
}
printf("\b");
pos--;
}
else if(ch!=8)
{
*(string + pos) = ch;
if(mask==0)
printf("%c",ch);
else
printf("%c",mask);
pos++;
}
}
return string;
}
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