1 /*
2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3 * unrestricted use provided that this legend is included on all tape
4 * media and as a part of the software program in whole or part. Users
5 * may copy or modify Sun RPC without charge, but are not authorized
6 * to license or distribute it to anyone else except as part of a product or
7 * program developed by the user or with the express written consent of
8 * Sun Microsystems, Inc.
9 *
10 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
11 * WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
12 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
13 *
14 * Sun RPC is provided with no support and without any obligation on the
15 * part of Sun Microsystems, Inc. to assist in its use, correction,
16 * modification or enhancement.
17 *
18 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
19 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
20 * OR ANY PART THEREOF.
21 *
22 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
23 * or profits or other special, indirect and consequential damages, even if
24 * Sun has been advised of the possibility of such damages.
25 *
26 * Sun Microsystems, Inc.
27 * 2550 Garcia Avenue
28 * Mountain View, California 94043
29 */
30
31 #if 0
32 #ifndef lint
33 static char sccsid[] = "@(#)chkey.c 1.7 91/03/11 Copyr 1986 Sun Micro";
34 #endif
35 #endif
36
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
39
40 /*
41 * Copyright (C) 1986, Sun Microsystems, Inc.
42 */
43
44 /*
45 * Command to change one's public key in the public key database
46 */
47 #include <rpc/rpc.h>
48 #include <rpc/key_prot.h>
49 #ifdef YP
50 #include <rpcsvc/yp_prot.h>
51 #include <rpcsvc/ypclnt.h>
52 #else
53 #define YPOP_STORE 4
54 #endif
55 #include <sys/fcntl.h>
56 #include <err.h>
57 #include <pwd.h>
58 #include <stdio.h>
59 #include <stdlib.h>
60 #include <string.h>
61 #include <unistd.h>
62
63 #include "extern.h"
64
65 #ifdef YPPASSWD
66 struct passwd *ypgetpwuid(uid_t);
67 #endif
68
69 #ifdef YP
70 static char *domain;
71 static char PKMAP[] = "publickey.byname";
72 #else
73 static char PKFILE[] = "/etc/publickey";
74 #endif /* YP */
75 static char ROOTKEY[] = "/etc/.rootkey";
76
77 static void usage(void);
78 extern int yp_update(char *, char *, int, char *, size_t, char *, size_t);
79
80 int
main(int argc,char ** argv)81 main(int argc, char **argv)
82 {
83 char name[MAXNETNAMELEN+1];
84 char public[HEXKEYBYTES + 1];
85 char secret[HEXKEYBYTES + 1];
86 char crypt1[HEXKEYBYTES + KEYCHECKSUMSIZE + 1];
87 char crypt2[HEXKEYBYTES + KEYCHECKSUMSIZE + 1];
88 int status;
89 char *pass;
90 struct passwd *pw;
91 uid_t uid;
92 int force = 0;
93 int ch;
94 #ifdef YP
95 char *master;
96 #endif
97 #ifdef YPPASSWD
98 char *cryptpw;
99 #endif
100
101 while ((ch = getopt(argc, argv, "f")) != -1)
102 switch(ch) {
103 case 'f':
104 force = 1;
105 break;
106 default:
107 usage();
108 }
109 argc -= optind;
110 argv += optind;
111
112 if (argc != 0)
113 usage();
114
115 #ifdef YP
116 (void)yp_get_default_domain(&domain);
117 if (yp_master(domain, PKMAP, &master) != 0)
118 errx(1, "can't find master of publickey database");
119 #endif
120 uid = getuid() /*geteuid()*/;
121 if (uid == 0) {
122 if (host2netname(name, NULL, NULL) == 0)
123 errx(1, "cannot convert hostname to netname");
124 } else {
125 if (user2netname(name, uid, NULL) == 0)
126 errx(1, "cannot convert username to netname");
127 }
128 (void)printf("Generating new key for %s.\n", name);
129
130 if (!force) {
131 if (uid != 0) {
132 #ifdef YPPASSWD
133 pw = ypgetpwuid(uid);
134 #else
135 pw = getpwuid(uid);
136 #endif
137 if (pw == NULL) {
138 #ifdef YPPASSWD
139 errx(1,
140 "no NIS password entry found: can't change key");
141 #else
142 errx(1,
143 "no password entry found: can't change key");
144 #endif
145 }
146 } else {
147 pw = getpwuid(0);
148 if (pw == NULL)
149 errx(1, "no password entry found: can't change key");
150 }
151 }
152 pass = getpass("Password:");
153 #ifdef YPPASSWD
154 if (!force) {
155 cryptpw = crypt(pass, pw->pw_passwd);
156 if (cryptpw == NULL || strcmp(cryptpw, pw->pw_passwd) != 0)
157 errx(1, "invalid password");
158 }
159 #else
160 force = 1; /* Make this mandatory */
161 #endif
162 genkeys(public, secret, pass);
163
164 memcpy(crypt1, secret, HEXKEYBYTES);
165 memcpy(crypt1 + HEXKEYBYTES, secret, KEYCHECKSUMSIZE);
166 crypt1[HEXKEYBYTES + KEYCHECKSUMSIZE] = 0;
167 xencrypt(crypt1, pass);
168
169 if (force) {
170 memcpy(crypt2, crypt1, HEXKEYBYTES + KEYCHECKSUMSIZE + 1);
171 xdecrypt(crypt2, getpass("Retype password:"));
172 if (memcmp(crypt2, crypt2 + HEXKEYBYTES, KEYCHECKSUMSIZE) != 0
173 || memcmp(crypt2, secret, HEXKEYBYTES) != 0)
174 errx(1, "password incorrect");
175 }
176
177 #ifdef YP
178 (void)printf("Sending key change request to %s...\n", master);
179 #endif
180 status = setpublicmap(name, public, crypt1);
181 if (status != 0) {
182 #ifdef YP
183 errx(1, "unable to update NIS database (%u): %s",
184 status, yperr_string(status));
185 #else
186 errx(1, "unable to update publickey database");
187 #endif
188 }
189
190 if (uid == 0) {
191 /*
192 * Root users store their key in /etc/$ROOTKEY so
193 * that they can auto reboot without having to be
194 * around to type a password. Storing this in a file
195 * is rather dubious: it should really be in the EEPROM
196 * so it does not go over the net.
197 */
198 int fd;
199
200 fd = open(ROOTKEY, O_WRONLY|O_TRUNC|O_CREAT, 0);
201 if (fd < 0) {
202 warn("%s", ROOTKEY);
203 } else {
204 char newline = '\n';
205
206 if (write(fd, secret, strlen(secret)) < 0 ||
207 write(fd, &newline, sizeof(newline)) < 0)
208 warn("%s: write", ROOTKEY);
209 }
210 close(fd);
211 }
212
213 if (key_setsecret(secret) < 0)
214 errx(1, "unable to login with new secret key");
215 (void)printf("Done.\n");
216 exit(0);
217 /* NOTREACHED */
218 }
219
220 static void
usage(void)221 usage(void)
222 {
223 (void)fprintf(stderr, "usage: chkey [-f]\n");
224 exit(1);
225 /* NOTREACHED */
226 }
227
228
229 /*
230 * Set the entry in the public key file
231 */
232 int
setpublicmap(char * name,char * public,char * secret)233 setpublicmap(char *name, char *public, char *secret)
234 {
235 char pkent[1024];
236
237 (void)sprintf(pkent,"%s:%s", public, secret);
238 #ifdef YP
239 return (yp_update(domain, PKMAP, YPOP_STORE,
240 name, strlen(name), pkent, strlen(pkent)));
241 #else
242 return (localupdate(name, PKFILE, YPOP_STORE,
243 strlen(name), name, strlen(pkent), pkent));
244 #endif
245 }
246
247 #ifdef YPPASSWD
248 struct passwd *
ypgetpwuid(uid_t uid)249 ypgetpwuid(uid_t uid)
250 {
251 char uidstr[10];
252 char *val;
253 int vallen;
254 static struct passwd pw;
255 char *p;
256
257 (void)sprintf(uidstr, "%d", uid);
258 if (yp_match(domain, "passwd.byuid", uidstr, strlen(uidstr),
259 &val, &vallen) != 0) {
260 return (NULL);
261 }
262 p = strchr(val, ':');
263 if (p == NULL) {
264 return (NULL);
265 }
266 pw.pw_passwd = p + 1;
267 p = strchr(pw.pw_passwd, ':');
268 if (p == NULL) {
269 return (NULL);
270 }
271 *p = 0;
272 return (&pw);
273 }
274 #endif /* YPPASSWD */
275