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 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 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 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 * 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