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From: Brian Inglis <Brian DOT Inglis AT SystematicSw DOT ab DOT ca>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: password and masking
Organization: Systematic Software
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References: <a64q59$psf$1 AT iac5 DOT navix DOT net> <fc DOT 000f77f3001f30ab3b9aca00e8ae905a DOT 1f30d5 AT bni DOT mg>
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Date: Sun, 17 Mar 2002 08:51:04 GMT
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To: djgpp AT delorie DOT com
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On Thu, 07 Mar 2002 08:20:03 +0300, "NirinaMichel
Ratoandromanana/DS-INFO" <n DOT ratoandromanana AT bni DOT mg> wrote:

>Erratum: the correct code should be this:
>
>unsigned char *getpwd (char prompt[], char *password)
>{
>	unsigned char *p = password;
>	int c;
>	printf ("%s", prompt);
>	while (1)
>	{
>		c = getch();	//get char without echo, see getch vs. getche
>		// terminate on end of line or file ^j, ^m, ^d, ^z
>		if (c == '\r' || c == '\n' || c == '\004' || c == '\032')
>			break;
>		else if (c == '\b')
>		{
>			p--;
>//to get back and erase the previous * and get back again
>			printf ("\0x1B \0x1B");
>			continue;
>		}
>		else
>		{
>			printf ("*");
>			*p++ = c;
>		}		
>	}
>	*p = '\0';
>	printf ("\n");
>	return p;
>}

echoing no characters, space characters, or a small random number
(1-3) of stars makes the length of the password less obvious if
someone is snooping nearby

-- 

Thanks. Take care, Brian Inglis 	Calgary, Alberta, Canada

Brian DOT Inglis AT CSi DOT com 	(Brian dot Inglis at SystematicSw dot ab dot ca)
    fake address		use address above to reply

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