projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 640d6f08 DB |
1 | /*- |
| 2 | * Copyright (c) 1992 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * %sccs.include.redist.c% | |
| 6 | */ | |
| 7 | ||
| 8 | #ifndef lint | |
| 9 | static char sccsid[] = "@(#)read_password.c 5.1 (Berkeley) %G%"; | |
| 10 | #endif /* not lint */ | |
| 11 | ||
| 12 | /* | |
| 13 | * $Source: /mit/kerberos/src/lib/des/RCS/read_password.c,v $ | |
| 14 | * $Author: jon $ | |
| 15 | * | |
| 16 | * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute | |
| 17 | * of Technology. | |
| 18 | * | |
| 19 | * For copying and distribution information, please see the file | |
| 20 | * <mit-copyright.h>. | |
| 21 | * | |
| 22 | * This routine prints the supplied string to standard | |
| 23 | * output as a prompt, and reads a password string without | |
| 24 | * echoing. | |
| 25 | */ | |
| 26 | ||
| 27 | #include <stdio.h> | |
| 28 | #include <strings.h> | |
| 29 | #include <sys/ioctl.h> | |
| 30 | #include <signal.h> | |
| 31 | #include <setjmp.h> | |
| 32 | ||
| 33 | static jmp_buf env; | |
| 34 | ||
| 35 | /*** Routines ****************************************************** */ | |
| 36 | /* | |
| 37 | * This version just returns the string, doesn't map to key. | |
| 38 | * | |
| 39 | * Returns 0 on success, non-zero on failure. | |
| 40 | */ | |
| 41 | ||
| 42 | int | |
| 43 | local_des_read_pw_string(s,max,prompt,verify) | |
| 44 | char *s; | |
| 45 | int max; | |
| 46 | char *prompt; | |
| 47 | int verify; | |
| 48 | { | |
| 49 | int ok = 0; | |
| 50 | char *ptr; | |
| 51 | ||
| 52 | jmp_buf old_env; | |
| 53 | struct sgttyb tty_state; | |
| 54 | char key_string[BUFSIZ]; | |
| 55 | ||
| 56 | if (max > BUFSIZ) { | |
| 57 | return -1; | |
| 58 | } | |
| 59 | ||
| 60 | /* XXX assume jmp_buf is typedef'ed to an array */ | |
| 61 | bcopy((char *)old_env, (char *)env, sizeof(env)); | |
| 62 | if (setjmp(env)) | |
| 63 | goto lose; | |
| 64 | ||
| 65 | /* save terminal state*/ | |
| 66 | if (ioctl(0,TIOCGETP,(char *)&tty_state) == -1) | |
| 67 | return -1; | |
| 68 | /* | |
| 69 | push_signals(); | |
| 70 | */ | |
| 71 | /* Turn off echo */ | |
| 72 | tty_state.sg_flags &= ~ECHO; | |
| 73 | if (ioctl(0,TIOCSETP,(char *)&tty_state) == -1) | |
| 74 | return -1; | |
| 75 | while (!ok) { | |
| 76 | (void) printf(prompt); | |
| 77 | (void) fflush(stdout); | |
| 78 | while (!fgets(s, max, stdin)); | |
| 79 | ||
| 80 | if ((ptr = index(s, '\n'))) | |
| 81 | *ptr = '\0'; | |
| 82 | if (verify) { | |
| 83 | printf("\nVerifying, please re-enter %s",prompt); | |
| 84 | (void) fflush(stdout); | |
| 85 | if (!fgets(key_string, sizeof(key_string), stdin)) { | |
| 86 | clearerr(stdin); | |
| 87 | continue; | |
| 88 | } | |
| 89 | if ((ptr = index(key_string, '\n'))) | |
| 90 | *ptr = '\0'; | |
| 91 | if (strcmp(s,key_string)) { | |
| 92 | printf("\n\07\07Mismatch - try again\n"); | |
| 93 | (void) fflush(stdout); | |
| 94 | continue; | |
| 95 | } | |
| 96 | } | |
| 97 | ok = 1; | |
| 98 | } | |
| 99 | ||
| 100 | lose: | |
| 101 | if (!ok) | |
| 102 | bzero(s, max); | |
| 103 | printf("\n"); | |
| 104 | /* turn echo back on */ | |
| 105 | tty_state.sg_flags |= ECHO; | |
| 106 | if (ioctl(0,TIOCSETP,(char *)&tty_state)) | |
| 107 | ok = 0; | |
| 108 | /* | |
| 109 | pop_signals(); | |
| 110 | */ | |
| 111 | bcopy((char *)env, (char *)old_env, sizeof(env)); | |
| 112 | if (verify) | |
| 113 | bzero(key_string, sizeof (key_string)); | |
| 114 | s[max-1] = 0; /* force termination */ | |
| 115 | return !ok; /* return nonzero if not okay */ | |
| 116 | } |