UTL_PAS.C

// --UTL_PAS.C------------------------------------------------------------------ 
// 
// Get password from the user helper function 
// 
// Copyright (C) Microsoft Corp. 1986-1996.  All Rights Reserved. 
// ----------------------------------------------------------------------------- 
 
#include "edk.h" 
#include "utl_pas.chk" 
 
//$--_HrInputCommandLinePassword--------------------------------------------------------- 
// 
//  DESCRIPTION: Input password and echo *'s. 
// 
//  INPUT:  dwFlags     --  reserved - must be zero 
//          cbLength    --  length of buffer/password 
// 
//  OUTPUT: pszBuffer   --  buffer to write password into 
// 
//  RETURNS:    HRESULT --  NOERROR if no error, 
//                          E_FAIL if user enters ctrl-c, 
//                          E_INVALIDARG if bad input 
// 
// ----------------------------------------------------------------------------- 
HRESULT _HrInputCommandLinePassword(// RETURNS: HRESULT 
IN DWORD dwFlags,// reserved--must be zero 
IN DWORD cbLength,          // size of the buffer in bytes 
OUT LPSTR pszBuffer)// buffer to write string into 
{ 
    HRESULT     hr          = NOERROR; 
    LPSTRpsz= pszBuffer; 
 
DEBUGPUBLIC("_HrInputCommandLinePassword()\n"); 
 
    // check input parameters 
    hr = CHK__HrInputCommandLinePassword(dwFlags, cbLength, pszBuffer); 
 
    if ( FAILED(hr) ) 
    { 
        RETURN(hr); 
    } 
 
    for(;;) 
    { 
        int ch = _getch(); 
 
// Handle Ctrl-C. 
 
if (ch == '\003') 
{ 
printf("^C"); 
hr = HR_LOG(E_FAIL); 
*pszBuffer = 0; 
break; 
} 
 
// Handle backspace. 
 
if (ch == '\b' && psz > pszBuffer) 
{ 
printf( "\b \b" ); 
psz--; 
cbLength++; 
} 
 
// Handle normal printable character. 
 
if (isprint(ch)) 
{ 
        printf ( "*" ); 
        *psz++ = ch; 
        cbLength--; 
} 
 
// Handle input termination. 
 
        if (ch == '\n' || ch == '\r' || cbLength < 2) 
        { 
            *psz = 0; 
            break; 
        } 
    } 
 
    printf ( "\n" ); 
 
RETURN(hr); 
 
}