home *** CD-ROM | disk | FTP | other *** search
- /*
- *
- * $Source: /usr/src/kerberosIV/krb/RCS/get_in_tkt.c,v $
- * $Author: kfall $
- *
- * Copyright 1987, 1988 by the Massachusetts Institute of Technology.
- *
- * For copying and distribution information, please see the file
- * <mit-copyright.h>.
- */
-
- #ifndef lint
- static char rcsid_get_in_tkt_c[] =
- "$Header: /usr/src/kerberosIV/krb/RCS/get_in_tkt.c,v 4.13 90/06/23 03:10:32 kfall Exp $";
- #endif /* lint */
-
- #include <mit-copyright.h>
- #include <des.h>
- #include <krb.h>
- #include <prot.h>
-
- #ifndef NULL
- #define NULL 0
- #endif
-
- /*
- * This file contains two routines: passwd_to_key() converts
- * a password into a DES key (prompting for the password if
- * not supplied), and krb_get_pw_in_tkt() gets an initial ticket for
- * a user.
- */
-
- /*
- * passwd_to_key(): given a password, return a DES key.
- * There are extra arguments here which (used to be?)
- * used by srvtab_to_key().
- *
- * If the "passwd" argument is not null, generate a DES
- * key from it, using string_to_key().
- *
- * If the "passwd" argument is null, call des_read_password()
- * to prompt for a password and then convert it into a DES key.
- *
- * In either case, the resulting key is put in the "key" argument,
- * and 0 is returned.
- */
-
- /*ARGSUSED */
- static int passwd_to_key(user,instance,realm,passwd,key)
- char *user, *instance, *realm, *passwd;
- C_Block key;
- {
- #ifdef NOENCRYPTION
- if (!passwd)
- placebo_read_password(key, "Password: ", 0);
- #else /* Do encyryption */
- if (passwd)
- string_to_key(passwd, key);
- else {
- des_read_password(key, "Kerberos Password: ", 0);
- }
- #endif /* NOENCRYPTION */
- return (0);
- }
-
- /*
- * krb_get_pw_in_tkt() takes the name of the server for which the initial
- * ticket is to be obtained, the name of the principal the ticket is
- * for, the desired lifetime of the ticket, and the user's password.
- * It passes its arguments on to krb_get_in_tkt(), which contacts
- * Kerberos to get the ticket, decrypts it using the password provided,
- * and stores it away for future use.
- *
- * krb_get_pw_in_tkt() passes two additional arguments to krb_get_in_tkt():
- * the name of a routine (passwd_to_key()) to be used to get the
- * password in case the "password" argument is null and NULL for the
- * decryption procedure indicating that krb_get_in_tkt should use the
- * default method of decrypting the response from the KDC.
- *
- * The result of the call to krb_get_in_tkt() is returned.
- */
-
- krb_get_pw_in_tkt(user,instance,realm,service,sinstance,life,password)
- char *user, *instance, *realm, *service, *sinstance;
- int life;
- char *password;
- {
- return(krb_get_in_tkt(user,instance,realm,service,sinstance,life,
- passwd_to_key, NULL, password));
- }
-
- #ifdef NOENCRYPTION
- /*
- * $Source: /usr/src/kerberosIV/krb/RCS/get_in_tkt.c,v $
- * $Author: kfall $
- *
- * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute
- * of Technology.
- *
- * For copying and distribution information, please see the file
- * <mit-copyright.h>.
- *
- * This routine prints the supplied string to standard
- * output as a prompt, and reads a password string without
- * echoing.
- */
-
- #ifndef lint
- static char rcsid_read_password_c[] =
- "$Header: /usr/src/kerberosIV/krb/RCS/get_in_tkt.c,v 4.13 90/06/23 03:10:32 kfall Exp $";
- #endif lint
-
- #include <des.h>
- #include "conf.h"
-
- #include <stdio.h>
- #ifdef BSDUNIX
- #include <strings.h>
- #include <sys/ioctl.h>
- #include <signal.h>
- #include <setjmp.h>
- #else
- char *strcpy();
- int strcmp();
- #endif
-
- #ifdef BSDUNIX
- static jmp_buf env;
- #endif
-
- #ifdef BSDUNIX
- static void sig_restore();
- static push_signals(), pop_signals();
- int placebo_read_pw_string();
- #endif
-
- /*** Routines ****************************************************** */
- int
- placebo_read_password(k,prompt,verify)
- des_cblock *k;
- char *prompt;
- int verify;
- {
- int ok;
- char key_string[BUFSIZ];
-
- #ifdef BSDUNIX
- if (setjmp(env)) {
- ok = -1;
- goto lose;
- }
- #endif
-
- ok = placebo_read_pw_string(key_string, BUFSIZ, prompt, verify);
- if (ok == 0)
- bzero(k, sizeof(C_Block));
-
- lose:
- bzero(key_string, sizeof (key_string));
- return ok;
- }
-
- /*
- * This version just returns the string, doesn't map to key.
- *
- * Returns 0 on success, non-zero on failure.
- */
-
- int
- placebo_read_pw_string(s,max,prompt,verify)
- char *s;
- int max;
- char *prompt;
- int verify;
- {
- int ok = 0;
- char *ptr;
-
- #ifdef BSDUNIX
- jmp_buf old_env;
- struct sgttyb tty_state;
- #endif
- char key_string[BUFSIZ];
-
- if (max > BUFSIZ) {
- return -1;
- }
-
- #ifdef BSDUNIX
- bcopy(old_env, env, sizeof(env));
- if (setjmp(env))
- goto lose;
-
- /* save terminal state*/
- if (ioctl(0,TIOCGETP,&tty_state) == -1)
- return -1;
-
- push_signals();
- /* Turn off echo */
- tty_state.sg_flags &= ~ECHO;
- if (ioctl(0,TIOCSETP,&tty_state) == -1)
- return -1;
- #endif
- while (!ok) {
- printf(prompt);
- fflush(stdout);
- #ifdef CROSSMSDOS
- h19line(s,sizeof(s),0);
- if (!strlen(s))
- continue;
- #else
- if (!fgets(s, max, stdin)) {
- clearerr(stdin);
- continue;
- }
- if ((ptr = index(s, '\n')))
- *ptr = '\0';
- #endif
- if (verify) {
- printf("\nVerifying, please re-enter %s",prompt);
- fflush(stdout);
- #ifdef CROSSMSDOS
- h19line(key_string,sizeof(key_string),0);
- if (!strlen(key_string))
- continue;
- #else
- if (!fgets(key_string, sizeof(key_string), stdin)) {
- clearerr(stdin);
- continue;
- }
- if ((ptr = index(key_string, '\n')))
- *ptr = '\0';
- #endif
- if (strcmp(s,key_string)) {
- printf("\n\07\07Mismatch - try again\n");
- fflush(stdout);
- continue;
- }
- }
- ok = 1;
- }
-
- #ifdef BSDUNIX
- lose:
- if (!ok)
- bzero(s, max);
- printf("\n");
- /* turn echo back on */
- tty_state.sg_flags |= ECHO;
- if (ioctl(0,TIOCSETP,&tty_state))
- ok = 0;
- pop_signals();
- bcopy(env, old_env, sizeof(env));
- #endif
- if (verify)
- bzero(key_string, sizeof (key_string));
- s[max-1] = 0; /* force termination */
- return !ok; /* return nonzero if not okay */
- }
-
- #ifdef BSDUNIX
- /*
- * this can be static since we should never have more than
- * one set saved....
- */
- #ifdef POSIX
- static void (*old_sigfunc[NSIG])();
- #else
- static int (*old_sigfunc[NSIG])();
- #endif POSIX
-
- static push_signals()
- {
- register i;
- for (i = 0; i < NSIG; i++)
- old_sigfunc[i] = signal(i,sig_restore);
- }
-
- static pop_signals()
- {
- register i;
- for (i = 0; i < NSIG; i++)
- signal(i,old_sigfunc[i]);
- }
-
- static void sig_restore(sig,code,scp)
- int sig,code;
- struct sigcontext *scp;
- {
- longjmp(env,1);
- }
- #endif
- #endif /* NOENCRYPTION */
-