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/* $Id: read_pwd.c,v 1.1 1995/12/14 06:52:43 tholo Exp $ */
/* Copyright (C) 1993 Eric Young - see README for more details */
/* 06-Apr-92 Luke Brennan Support for VMS */
#include "des_locl.h"
#include <string.h>
#include <signal.h>
#include <setjmp.h>
/* Ick! */
#if defined(__svr4__) || defined(__sgi) || defined(linux)
#define TERMIO
#endif
#ifndef VMS
#ifndef MSDOS
#ifdef TERMIO
#include <termio.h>
#define sgttyb termio
#define sg_flags c_lflag
#define TIOCGETP TCGETA
#define TIOCSETP TCSETA
#else /* !TERMIO */
#include <sgtty.h>
#endif
#include <sys/ioctl.h>
#else /* MSDOS */
#define fgets(a,b,c) noecho_fgets(a,b,c)
#endif
#else /* VMS */
#include <ssdef.h>
#include <iodef.h>
#include <ttdef.h>
#include <descrip.h>
struct IOSB {
short iosb$w_value;
short iosb$w_count;
long iosb$l_info;
};
#endif
#ifndef NSIG
#define NSIG 32
#endif
static void read_till_nl();
static int read_pw();
static void recsig();
static void pushsig();
static void popsig();
#ifdef MSDOS
static int noecho_fgets();
#endif
static void (*savsig[NSIG])();
static jmp_buf save;
int des_read_password(key,prompt,verify)
des_cblock *key;
char *prompt;
int verify;
{
int ok;
char buf[BUFSIZ],buff[BUFSIZ];
if ((ok=read_pw(buf,buff,BUFSIZ,prompt,verify)) == 0)
des_string_to_key(buf,key);
bzero(buf,BUFSIZ);
bzero(buff,BUFSIZ);
return(ok);
}
int des_read_2passwords(key1,key2,prompt,verify)
des_cblock *key1;
des_cblock *key2;
char *prompt;
int verify;
{
int ok;
char buf[BUFSIZ],buff[BUFSIZ];
if ((ok=read_pw(buf,buff,BUFSIZ,prompt,verify)) == 0)
des_string_to_2keys(buf,key1,key2);
bzero(buf,BUFSIZ);
bzero(buff,BUFSIZ);
return(ok);
}
int des_read_pw_string(buf,length,prompt,verify)
char *buf;
int length;
char *prompt;
int verify;
{
char buff[BUFSIZ];
int ret;
ret=read_pw(buf,buff,(length>BUFSIZ)?BUFSIZ:length,prompt,verify);
bzero(buff,BUFSIZ);
return(ret);
}
static void read_till_nl(in)
FILE *in;
{
#define SIZE 4
char buf[SIZE+1];
do {
fgets(buf,SIZE,in);
} while (strchr(buf,'\n') == NULL);
}
/* return 0 if ok, 1 (or -1) otherwise */
static int read_pw(buf,buff,size,prompt,verify)
char *buf,*buff;
int size;
char *prompt;
int verify;
{
#ifndef VMS
#ifndef MSDOS
struct sgttyb tty_orig,tty_new;
#endif /* !MSDOS */
#else
struct IOSB iosb;
$DESCRIPTOR(terminal,"TT");
long tty_orig[3], tty_new[3];
long status;
unsigned short channel = 0;
#endif
int ok=0;
char *p;
int ps=0;
FILE *tty;
#ifndef MSDOS
if ((tty=fopen("/dev/tty","r")) == NULL)
tty=stdin;
#else /* MSDOS */
if ((tty=fopen("con","r")) == NULL)
tty=stdin;
#endif /* MSDOS */
#ifndef VMS
#ifdef TIOCGETP
if (ioctl(fileno(tty),TIOCGETP,(char *)&tty_orig) == -1)
return(-1);
bcopy(&(tty_orig),&(tty_new),sizeof(tty_orig));
#endif
#else /* VMS */
status = SYS$ASSIGN(&terminal,&channel,0,0);
if (status != SS$_NORMAL)
return(-1);
status=SYS$QIOW(0,channel,IO$_SENSEMODE,&iosb,0,0,tty_orig,12,0,0,0,0);
if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
return(-1);
#endif
if (setjmp(save))
{
ok=0;
goto error;
}
pushsig();
ps=1;
#ifndef VMS
#ifndef MSDOS
tty_new.sg_flags &= ~ECHO;
#endif /* !MSDOS */
#ifdef TIOCSETP
if (ioctl(fileno(tty),TIOCSETP,(char *)&tty_new) == -1)
return(-1);
#endif
#else /* VMS */
tty_new[0] = tty_orig[0];
tty_new[1] = tty_orig[1] | TT$M_NOECHO;
tty_new[2] = tty_orig[2];
status = SYS$QIOW(0,channel,IO$_SETMODE,&iosb,0,0,tty_new,12,0,0,0,0);
if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
return(-1);
#endif /* VMS */
ps=2;
while (!ok)
{
fputs(prompt,stderr);
fflush(stderr);
buf[0]='\0';
fgets(buf,size,tty);
if (feof(tty)) goto error;
if ((p=(char *)strchr(buf,'\n')) != NULL)
*p='\0';
else read_till_nl(tty);
if (verify)
{
fprintf(stderr,"\nVerifying password %s",prompt);
fflush(stderr);
buff[0]='\0';
fgets(buff,size,tty);
if (feof(tty)) goto error;
if ((p=(char *)strchr(buff,'\n')) != NULL)
*p='\0';
else read_till_nl(tty);
if (strcmp(buf,buff) != 0)
{
fprintf(stderr,"\nVerify failure - try again\n");
fflush(stderr);
continue;
}
}
ok=1;
}
error:
fprintf(stderr,"\n");
/* What can we do if there is an error? */
#ifndef VMS
#ifdef TIOCSETP
if (ps >= 2) ioctl(fileno(tty),TIOCSETP,(char *)&tty_orig);
#endif
#else /* VMS */
if (ps >= 2)
status = SYS$QIOW(0,channel,IO$_SETMODE,&iosb,0,0
,tty_orig,12,0,0,0,0);
#endif /* VMS */
if (ps >= 1) popsig();
if (stdin != tty) fclose(tty);
#ifdef VMS
status = SYS$DASSGN(channel);
#endif
return(!ok);
}
static void pushsig()
{
int i;
for (i=0; i<NSIG; i++)
savsig[i]=signal(i,recsig);
}
static void popsig()
{
int i;
for (i=0; i<NSIG; i++)
signal(i,savsig[i]);
}
static void recsig()
{
longjmp(save,1);
}
#ifdef MSDOS
static int noecho_fgets(buf,size,tty)
char *buf;
int size;
FILE *tty;
{
int i;
char *p;
p=buf;
for (;;)
{
if (size == 0)
{
*p='\0';
break;
}
size--;
i=getch();
if (i == '\r') i='\n';
*(p++)=i;
if (i == '\n')
{
*p='\0';
break;
}
}
}
#endif
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