334 lines
5.8 KiB
C
334 lines
5.8 KiB
C
/* read_pwd.c */
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/* Copyright (C) 1993 Eric Young - see README for more details */
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/* 06-Apr-92 Luke Brennan Support for VMS */
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/*-
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* $Id: read_pwd.c,v 1.1.1.1 1994/09/30 14:49:51 csgr Exp $
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*/
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#include "des_locl.h"
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#include <string.h>
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#include <signal.h>
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#include <setjmp.h>
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#include <sys/param.h>
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#ifdef BSD
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#include <pwd.h>
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extern char * getpass(const char * prompt);
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#endif
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#ifndef VMS
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#ifndef MSDOS
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#ifndef _IRIX
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#ifdef CRAY
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#include <termio.h>
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#define sgttyb termio
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#define sg_flags c_lflag
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#else /* !CRAY */
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#include <sgtty.h>
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#endif
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#include <sys/ioctl.h>
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#else /* _IRIX */
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struct sgttyb {
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char sg_ispeed; /* input speed */
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char sg_ospeed; /* output speed */
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char sg_erase; /* erase character */
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char sg_kill; /* kill character */
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short sg_flags; /* mode flags */
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};
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#endif
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#else /* MSDOS */
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#define fgets(a,b,c) noecho_fgets(a,b,c)
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#ifndef NSIG
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#define NSIG 32
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#endif
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#endif
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#else /* VMS */
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#include <ssdef.h>
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#include <iodef.h>
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#include <ttdef.h>
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#include <descrip.h>
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struct IOSB {
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short iosb$w_value;
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short iosb$w_count;
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long iosb$l_info;
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};
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#endif
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static void read_till_nl();
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static int read_pw();
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static void recsig();
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static void pushsig();
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static void popsig();
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#ifdef MSDOS
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static int noecho_fgets();
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#endif
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static void (*savsig[NSIG])();
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static jmp_buf save;
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int des_read_password(key,prompt,verify)
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des_cblock *key;
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char *prompt;
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int verify;
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{
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int ok;
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char buf[BUFSIZ],buff[BUFSIZ];
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if ((ok=read_pw(buf,buff,BUFSIZ,prompt,verify)) == 0)
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des_string_to_key(buf,key);
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bzero(buf,BUFSIZ);
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bzero(buff,BUFSIZ);
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return(ok);
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}
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int des_read_2passwords(key1,key2,prompt,verify)
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des_cblock *key1;
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des_cblock *key2;
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char *prompt;
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int verify;
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{
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int ok;
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char buf[BUFSIZ],buff[BUFSIZ];
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if ((ok=read_pw(buf,buff,BUFSIZ,prompt,verify)) == 0)
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des_string_to_2keys(buf,key1,key2);
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bzero(buf,BUFSIZ);
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bzero(buff,BUFSIZ);
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return(ok);
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}
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#if defined(BSD)
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int des_read_pw_string(buf, length, prompt, verify)
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char *buf;
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int length;
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char * prompt;
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int verify;
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{
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int len = MIN(_PASSWORD_LEN, length);
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char * s;
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int ok = 0;
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fflush(stdout);
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while (!ok) {
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s = getpass(prompt);
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strncpy(buf, s, len);
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if(verify) {
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printf("Verifying password\n"); fflush(stdout);
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if(strncmp(getpass(prompt), buf, len) != 0) {
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printf("\nVerify failure - try again\n");
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fflush(stdout);
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continue;
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}
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}
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ok = 1;
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buf[len-1] = '\0';
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}
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return (!ok);
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}
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#else /* BSD */
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int des_read_pw_string(buf,length,prompt,verify)
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char *buf;
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int length;
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char *prompt;
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int verify;
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{
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char buff[BUFSIZ];
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int ret;
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ret=read_pw(buf,buff,(length>BUFSIZ)?BUFSIZ:length,prompt,verify);
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bzero(buff,BUFSIZ);
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return(ret);
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}
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#endif
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static void read_till_nl(in)
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FILE *in;
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{
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#define SIZE 4
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char buf[SIZE+1];
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do {
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fgets(buf,SIZE,in);
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} while (index(buf,'\n') == NULL);
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}
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/* return 0 if ok, 1 (or -1) otherwise */
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static int read_pw(buf,buff,size,prompt,verify)
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char *buf,*buff;
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int size;
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char *prompt;
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int verify;
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{
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#ifndef VMS
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#ifndef MSDOS
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struct sgttyb tty_orig,tty_new;
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#endif /* !MSDOS */
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#else
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struct IOSB iosb;
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$DESCRIPTOR(terminal,"TT");
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long tty_orig[3], tty_new[3];
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long status;
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unsigned short channel = 0;
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#endif
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int ok=0;
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char *p;
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int ps=0;
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FILE *tty;
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#ifndef MSDOS
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if ((tty=fopen("/dev/tty","r")) == NULL)
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tty=stdin;
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#else /* MSDOS */
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if ((tty=fopen("con","r")) == NULL)
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tty=stdin;
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#endif /* MSDOS */
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#ifndef VMS
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#ifdef TIOCGETP
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if (ioctl(fileno(tty),TIOCGETP,(char *)&tty_orig) == -1)
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return(-1);
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bcopy(&(tty_orig),&(tty_new),sizeof(tty_orig));
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#endif
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#else /* VMS */
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status = SYS$ASSIGN(&terminal,&channel,0,0);
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if (status != SS$_NORMAL)
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return(-1);
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status=SYS$QIOW(0,channel,IO$_SENSEMODE,&iosb,0,0,tty_orig,12,0,0,0,0);
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if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
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return(-1);
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#endif
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if (setjmp(save))
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{
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ok=0;
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goto error;
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}
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pushsig();
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ps=1;
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#ifndef VMS
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#ifndef MSDOS
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tty_new.sg_flags &= ~ECHO;
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#endif /* !MSDOS */
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#ifdef TIOCSETP
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if (ioctl(fileno(tty),TIOCSETP,(char *)&tty_new) == -1)
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return(-1);
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#endif
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#else /* VMS */
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tty_new[0] = tty_orig[0];
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tty_new[1] = tty_orig[1] | TT$M_NOECHO;
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tty_new[2] = tty_orig[2];
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status = SYS$QIOW(0,channel,IO$_SETMODE,&iosb,0,0,tty_new,12,0,0,0,0);
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if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
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return(-1);
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#endif /* VMS */
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ps=2;
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fflush(stdout);
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fflush(stderr);
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while (!ok)
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{
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fputs(prompt,stderr);
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fflush(stderr);
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buf[0]='\0';
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fgets(buf,size,tty);
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if (feof(tty)) goto error;
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if ((p=(char *)index(buf,'\n')) != NULL)
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*p='\0';
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else read_till_nl(tty);
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if (verify)
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{
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fprintf(stderr,"\nVerifying password %s",prompt);
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fflush(stderr);
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buff[0]='\0';
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fgets(buff,size,tty);
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if (feof(tty)) goto error;
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if ((p=(char *)index(buff,'\n')) != NULL)
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*p='\0';
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else read_till_nl(tty);
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if (strcmp(buf,buff) != 0)
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{
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fprintf(stderr,"\nVerify failure - try again\n");
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fflush(stderr);
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continue;
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}
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}
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ok=1;
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}
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error:
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fprintf(stderr,"\n");
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/* What can we do if there is an error? */
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#ifndef VMS
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#ifdef TIOCSETP
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if (ps >= 2) ioctl(fileno(tty),TIOCSETP,(char *)&tty_orig);
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#endif
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#else /* VMS */
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if (ps >= 2)
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status = SYS$QIOW(0,channel,IO$_SETMODE,&iosb,0,0
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,tty_orig,12,0,0,0,0);
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#endif /* VMS */
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if (ps >= 1) popsig();
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if (stdin != tty) fclose(tty);
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#ifdef VMS
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status = SYS$DASSGN(channel);
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#endif
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return(!ok);
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}
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static void pushsig()
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{
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int i;
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for (i=0; i<NSIG; i++)
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savsig[i]=signal(i,recsig);
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}
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static void popsig()
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{
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int i;
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for (i=0; i<NSIG; i++)
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signal(i,savsig[i]);
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}
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static void recsig()
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{
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longjmp(save,1);
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}
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#ifdef MSDOS
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static int noecho_fgets(buf,size,tty)
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char *buf;
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int size;
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FILE *tty;
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{
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int i;
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char *p;
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p=buf;
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for (;;)
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{
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if (size == 0)
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{
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*p='\0';
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break;
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}
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size--;
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i=getch();
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if (i == '\r') i='\n';
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*(p++)=i;
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if (i == '\n')
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{
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*p='\0';
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break;
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}
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}
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}
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#endif
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