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81b3355c C |
1 | /* |
2 | * $Source: /usr/src/kerberosIV/des/RCS/read_password.c,v $ | |
3 | * $Author: kfall $ | |
4 | * | |
5 | * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute | |
6 | * of Technology. | |
7 | * | |
8 | * For copying and distribution information, please see the file | |
9 | * <mit-copyright.h>. | |
10 | * | |
11 | * This routine prints the supplied string to standard | |
12 | * output as a prompt, and reads a password string without | |
13 | * echoing. | |
14 | */ | |
15 | ||
16 | #ifndef lint | |
17 | static char rcsid_read_password_c[] = | |
18 | "$Header: /usr/src/kerberosIV/des/RCS/read_password.c,v 4.13 90/06/23 03:09:35 kfall Exp $"; | |
19 | #endif lint | |
20 | ||
21 | #include <sys/param.h> | |
22 | #include <stdio.h> | |
23 | #include <string.h> | |
24 | #include <setjmp.h> | |
25 | #include <pwd.h> | |
26 | #include <mit-copyright.h> | |
27 | #include <des.h> | |
28 | #include "conf.h" | |
29 | ||
30 | extern char *getpass(); | |
31 | ||
32 | #ifdef BSDUNIX | |
33 | static jmp_buf env; | |
34 | #endif | |
35 | ||
36 | int | |
37 | des_read_password(k, prompt, verify) | |
38 | des_cblock *k; | |
39 | char *prompt; | |
40 | int verify; | |
41 | { | |
42 | int ok; | |
43 | char key_string[_PASSWORD_LEN]; | |
44 | ||
45 | #ifdef BSDUNIX | |
46 | if (setjmp(env)) { | |
47 | ok = -1; | |
48 | goto lose; | |
49 | } | |
50 | #endif | |
51 | ||
52 | ok = des_read_pw_string(key_string, _PASSWORD_LEN, prompt, verify); | |
53 | if (ok == 0) | |
54 | des_string_to_key(key_string, k); | |
55 | ||
56 | lose: | |
57 | bzero(key_string, sizeof (key_string)); | |
58 | return ok; | |
59 | } | |
60 | ||
61 | /* | |
62 | * This version just returns the string, doesn't map to key. | |
63 | * | |
64 | * Returns 0 on success, non-zero on failure. | |
65 | */ | |
66 | ||
67 | int | |
68 | des_read_pw_string(s, max, prompt, verify) | |
69 | char *s; | |
70 | int max; | |
71 | char *prompt; | |
72 | int verify; | |
73 | { | |
74 | register int len = MIN(_PASSWORD_LEN, max); | |
75 | char *ptr = getpass(prompt); | |
76 | ||
77 | (void)strncpy(s, ptr, len); | |
78 | if (verify) { | |
79 | while (strncmp(getpass(prompt), s, len) != 0) { | |
80 | printf("\n\07\07Mismatch - try again\n"); | |
81 | (void)fflush(stdout); | |
82 | continue; | |
83 | } | |
84 | } | |
85 | s[len-1] = '\0'; /* just in case */ | |
86 | return 0; | |
87 | } |