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/*
* lib/des425/read_passwd.c
*
* Copyright 1985,1986,1987,1988,1991 by the Massachusetts Institute
* of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
*
* This routine prints the supplied string to standard
* output as a prompt, and reads a password string without
* echoing.
*/
#if !defined(_MSDOS)&&!defined(_WIN32)
#include "des.h"
#include <stdio.h>
#include <errno.h>
#include <signal.h>
#include <setjmp.h>
#ifndef ECHO_PASSWORD
#include <termios.h>
#endif /* ECHO_PASSWORD */
static jmp_buf pwd_jump;
static krb5_sigtype
intr_routine(signo)
int signo;
{
longjmp(pwd_jump, 1);
/*NOTREACHED*/
}
/*** Routines ****************************************************** */
krb5_error_code
des_read_pw_string/*_v4_compat_crock*/(return_pwd, bufsize, prompt, prompt2)
char *return_pwd;
int bufsize;
char *prompt;
char *prompt2;
{
volatile char *readin_string = 0;
register char *ptr;
int scratchchar;
krb5_sigtype (*ointrfunc)();
krb5_error_code errcode;
#ifndef ECHO_PASSWORD
struct termios echo_control, save_control;
int fd;
/* get the file descriptor associated with stdin */
fd=fileno(stdin);
if (tcgetattr(fd, &echo_control) == -1)
return errno;
save_control = echo_control;
echo_control.c_lflag &= ~(ECHO|ECHONL);
if (tcsetattr(fd, TCSANOW, &echo_control) == -1)
return errno;
#endif /* ECHO_PASSWORD */
if (setjmp(pwd_jump)) {
errcode = KRB5_LIBOS_PWDINTR; /* we were interrupted... */
goto cleanup;
}
/* save intrfunc */
ointrfunc = signal(SIGINT, intr_routine);
/* put out the prompt */
(void) fputs(prompt,stdout);
(void) fflush(stdout);
(void) memset(return_pwd, 0, bufsize);
if (fgets(return_pwd, bufsize, stdin) == NULL) {
(void) putchar('\n');
errcode = KRB5_LIBOS_CANTREADPWD;
goto cleanup;
}
(void) putchar('\n');
/* fgets always null-terminates the returned string */
/* replace newline with null */
if ((ptr = strchr(return_pwd, '\n')))
*ptr = '\0';
else /* flush rest of input line */
do {
scratchchar = getchar();
} while (scratchchar != EOF && scratchchar != '\n');
if (prompt2) {
/* put out the prompt */
(void) fputs(prompt2,stdout);
(void) fflush(stdout);
readin_string = malloc(bufsize);
if (!readin_string) {
errcode = ENOMEM;
goto cleanup;
}
(void) memset((char *)readin_string, 0, bufsize);
if (fgets((char *)readin_string, bufsize, stdin) == NULL) {
(void) putchar('\n');
errcode = KRB5_LIBOS_CANTREADPWD;
goto cleanup;
}
(void) putchar('\n');
if ((ptr = strchr((char *)readin_string, '\n')))
*ptr = '\0';
else /* need to flush */
do {
scratchchar = getchar();
} while (scratchchar != EOF && scratchchar != '\n');
/* compare */
if (strncmp(return_pwd, (char *)readin_string, bufsize)) {
errcode = KRB5_LIBOS_BADPWDMATCH;
goto cleanup;
}
}
errcode = 0;
cleanup:
(void) signal(SIGINT, ointrfunc);
#ifndef ECHO_PASSWORD
if ((tcsetattr(fd, TCSANOW, &save_control) == -1) &&
errcode == 0)
return errno;
#endif
if (readin_string) {
memset((char *)readin_string, 0, bufsize);
krb5_xfree(readin_string);
}
if (errcode)
memset(return_pwd, 0, bufsize);
return errcode;
}
krb5_error_code
des_read_password/*_v4_compat_crock*/(k,prompt,verify)
mit_des_cblock *k;
char *prompt;
int verify;
{
krb5_error_code ok;
char key_string[BUFSIZ];
char prompt2[BUFSIZ];
if (verify) {
strcpy(prompt2, "Verifying, please re-enter ");
strncat(prompt2, prompt, sizeof(prompt2)-(strlen(prompt2)+1));
}
ok = des_read_pw_string(key_string, sizeof(key_string),
prompt, verify ? prompt2 : 0);
if (ok == 0)
des_string_to_key(key_string, k);
memset(key_string, 0, sizeof (key_string));
return ok;
}
#else /* !unix */
/*
* These are all just dummy functions to make the rest of the library happy...
*/
#endif /* _WINDOWS */
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