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31 #include <sys/cdefs.h>
33 * Copyright (C) 1986, Sun Microsystems, Inc.
37 * Command to change one's public key in the public key database
40 #include <rpc/key_prot.h>
42 #include <rpcsvc/yp_prot.h>
43 #include <rpcsvc/ypclnt.h>
47 #include <sys/fcntl.h>
58 struct passwd *ypgetpwuid(uid_t);
63 static char PKMAP[] = "publickey.byname";
65 static char PKFILE[] = "/etc/publickey";
67 static char ROOTKEY[] = "/etc/.rootkey";
69 static void usage(void) __dead2;
70 extern int yp_update(char *, char *, int, char *, size_t, char *, size_t);
73 main(int argc, char **argv)
75 char name[MAXNETNAMELEN+1];
76 char public[HEXKEYBYTES + 1];
77 char secret[HEXKEYBYTES + 1];
78 char crypt1[HEXKEYBYTES + KEYCHECKSUMSIZE + 1];
79 char crypt2[HEXKEYBYTES + KEYCHECKSUMSIZE + 1];
93 while ((ch = getopt(argc, argv, "f")) != -1)
108 (void)yp_get_default_domain(&domain);
109 if (yp_master(domain, PKMAP, &master) != 0)
110 errx(1, "can't find master of publickey database");
112 uid = getuid() /*geteuid()*/;
114 if (host2netname(name, NULL, NULL) == 0)
115 errx(1, "cannot convert hostname to netname");
117 if (user2netname(name, uid, NULL) == 0)
118 errx(1, "cannot convert username to netname");
120 (void)printf("Generating new key for %s.\n", name);
125 pw = ypgetpwuid(uid);
132 "no NIS password entry found: can't change key");
135 "no password entry found: can't change key");
141 errx(1, "no password entry found: can't change key");
144 pass = getpass("Password:");
147 cryptpw = crypt(pass, pw->pw_passwd);
148 if (cryptpw == NULL || strcmp(cryptpw, pw->pw_passwd) != 0)
149 errx(1, "invalid password");
152 force = 1; /* Make this mandatory */
154 genkeys(public, secret, pass);
156 memcpy(crypt1, secret, HEXKEYBYTES);
157 memcpy(crypt1 + HEXKEYBYTES, secret, KEYCHECKSUMSIZE);
158 crypt1[HEXKEYBYTES + KEYCHECKSUMSIZE] = 0;
159 xencrypt(crypt1, pass);
162 memcpy(crypt2, crypt1, HEXKEYBYTES + KEYCHECKSUMSIZE + 1);
163 xdecrypt(crypt2, getpass("Retype password:"));
164 if (memcmp(crypt2, crypt2 + HEXKEYBYTES, KEYCHECKSUMSIZE) != 0
165 || memcmp(crypt2, secret, HEXKEYBYTES) != 0)
166 errx(1, "password incorrect");
170 (void)printf("Sending key change request to %s...\n", master);
172 status = setpublicmap(name, public, crypt1);
175 errx(1, "unable to update NIS database (%u): %s",
176 status, yperr_string(status));
178 errx(1, "unable to update publickey database");
184 * Root users store their key in /etc/$ROOTKEY so
185 * that they can auto reboot without having to be
186 * around to type a password. Storing this in a file
187 * is rather dubious: it should really be in the EEPROM
188 * so it does not go over the net.
192 fd = open(ROOTKEY, O_WRONLY|O_TRUNC|O_CREAT, 0);
198 if (write(fd, secret, strlen(secret)) < 0 ||
199 write(fd, &newline, sizeof(newline)) < 0)
200 warn("%s: write", ROOTKEY);
205 if (key_setsecret(secret) < 0)
206 errx(1, "unable to login with new secret key");
207 (void)printf("Done.\n");
215 (void)fprintf(stderr, "usage: chkey [-f]\n");
222 * Set the entry in the public key file
225 setpublicmap(char *name, char *public, char *secret)
229 (void)sprintf(pkent,"%s:%s", public, secret);
231 return (yp_update(domain, PKMAP, YPOP_STORE,
232 name, strlen(name), pkent, strlen(pkent)));
234 return (localupdate(name, PKFILE, YPOP_STORE,
235 strlen(name), name, strlen(pkent), pkent));
241 ypgetpwuid(uid_t uid)
246 static struct passwd pw;
249 (void)sprintf(uidstr, "%d", uid);
250 if (yp_match(domain, "passwd.byuid", uidstr, strlen(uidstr),
251 &val, &vallen) != 0) {
254 p = strchr(val, ':');
258 pw.pw_passwd = p + 1;
259 p = strchr(pw.pw_passwd, ':');
266 #endif /* YPPASSWD */