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 33static 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 66struct passwd *ypgetpwuid(uid_t); 67#endif 68 69#ifdef YP 70static char *domain; 71static char PKMAP[] = "publickey.byname"; 72#else 73static char PKFILE[] = "/etc/publickey"; 74#endif /* YP */ 75static char ROOTKEY[] = "/etc/.rootkey"; 76 77static void usage(void); 78extern int yp_update(char *, char *, int, char *, size_t, char *, size_t); 79 80int 81main(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 220static void 221usage(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 */ 232int 233setpublicmap(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 248struct passwd * 249ypgetpwuid(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