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05ccbb66 WJ |
1 | /*- |
2 | * Copyright (c) 1990 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | */ | |
33 | ||
34 | #ifndef lint | |
35 | static char sccsid[] = "@(#)local_passwd.c 5.5 (Berkeley) 5/6/91"; | |
36 | #endif /* not lint */ | |
37 | ||
38 | #include <sys/types.h> | |
39 | #include <pwd.h> | |
40 | #include <errno.h> | |
41 | #include <stdio.h> | |
42 | ||
43 | uid_t uid; | |
44 | ||
45 | char *progname = "passwd"; | |
46 | char *tempname; | |
47 | ||
48 | local_passwd(uname) | |
49 | char *uname; | |
50 | { | |
51 | struct passwd *pw; | |
52 | int pfd, tfd; | |
53 | char *getnewpasswd(); | |
54 | ||
55 | if (!(pw = getpwnam(uname))) { | |
56 | (void)fprintf(stderr, "passwd: unknown user %s.\n", uname); | |
57 | exit(1); | |
58 | } | |
59 | ||
60 | uid = getuid(); | |
61 | if (uid && uid != pw->pw_uid) { | |
62 | (void)fprintf(stderr, "passwd: %s\n", strerror(EACCES)); | |
63 | exit(1); | |
64 | } | |
65 | ||
66 | pw_init(); | |
67 | pfd = pw_lock(); | |
68 | tfd = pw_tmp(); | |
69 | ||
70 | /* | |
71 | * Get the new password. Reset passwd change time to zero; when | |
72 | * classes are implemented, go and get the "offset" value for this | |
73 | * class and reset the timer. | |
74 | */ | |
75 | pw->pw_passwd = getnewpasswd(pw); | |
76 | pw->pw_change = 0; | |
77 | pw_copy(pfd, tfd, pw); | |
78 | ||
79 | if (!pw_mkdb()) | |
80 | pw_error((char *)NULL, 0, 1); | |
81 | exit(0); | |
82 | } | |
83 | ||
84 | char * | |
85 | getnewpasswd(pw) | |
86 | register struct passwd *pw; | |
87 | { | |
88 | register char *p, *t; | |
89 | int tries; | |
90 | char buf[_PASSWORD_LEN+1], salt[9], *crypt(), *getpass(); | |
91 | ||
92 | (void)printf("Changing local password for %s.\n", pw->pw_name); | |
93 | ||
94 | if (uid && pw->pw_passwd && | |
95 | #ifdef DES | |
96 | strcmp(crypt(getpass("Old password:"), pw->pw_passwd), | |
97 | pw->pw_passwd)) { | |
98 | #else | |
99 | strcmp(getpass("Old password:"), pw->pw_passwd)) { | |
100 | #endif | |
101 | errno = EACCES; | |
102 | pw_error(NULL, 1, 1); | |
103 | } | |
104 | ||
105 | for (buf[0] = '\0', tries = 0;;) { | |
106 | p = getpass("New password:"); | |
107 | if (!*p) { | |
108 | (void)printf("Password unchanged.\n"); | |
109 | pw_error(NULL, 0, 0); | |
110 | } | |
111 | if (strlen(p) <= 5 && (uid != 0 || ++tries < 2)) { | |
112 | (void)printf("Please enter a longer password.\n"); | |
113 | continue; | |
114 | } | |
115 | for (t = p; *t && islower(*t); ++t); | |
116 | if (!*t && (uid != 0 || ++tries < 2)) { | |
117 | (void)printf("Please don't use an all-lower case password.\nUnusual capitalization, control characters or digits are suggested.\n"); | |
118 | continue; | |
119 | } | |
120 | (void)strcpy(buf, p); | |
121 | if (!strcmp(buf, getpass("Retype new password:"))) | |
122 | break; | |
123 | (void)printf("Mismatch; try again, EOF to quit.\n"); | |
124 | } | |
125 | /* grab a random printable character that isn't a colon */ | |
126 | (void)srandom((int)time((time_t *)NULL)); | |
127 | #ifdef NEWSALT | |
128 | salt[0] = _PASSWORD_EFMT1; | |
129 | to64(&salt[1], (long)(29 * 25), 4); | |
130 | to64(&salt[5], random(), 4); | |
131 | #else | |
132 | to64(&salt[0], random(), 2); | |
133 | #endif | |
134 | #ifdef DES | |
135 | return(crypt(buf, salt)); | |
136 | #else | |
137 | return(buf); | |
138 | #endif | |
139 | } | |
140 | ||
141 | static unsigned char itoa64[] = /* 0 ... 63 => ascii - 64 */ | |
142 | "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; | |
143 | ||
144 | to64(s, v, n) | |
145 | register char *s; | |
146 | register long v; | |
147 | register int n; | |
148 | { | |
149 | while (--n >= 0) { | |
150 | *s++ = itoa64[v&0x3f]; | |
151 | v >>= 6; | |
152 | } | |
153 | } |