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, MERCHANTIBILITY 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 * $DragonFly: src/usr.bin/chkey/chkey.c,v 1.5 2005/01/11 00:51:11 joerg Exp $ 31 * @(#)chkey.c 1.7 91/03/11 Copyr 1986 Sun Micro 32 */ 33 /* 34 * Copyright (C) 1986, Sun Microsystems, Inc. 35 */ 36 37 /* 38 * Command to change one's public key in the public key database 39 */ 40 #include <sys/fcntl.h> 41 #include <pwd.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <unistd.h> 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 #include <rpcsvc/yppasswd.h> 53 #else 54 #define YPOP_STORE 4 55 #endif 56 57 #include "externs.h" 58 59 #ifdef YPPASSWD 60 static struct passwd *ypgetpwuid(uid_t); 61 #endif 62 63 #ifdef YP 64 static char *domain; 65 static char PKMAP[] = "publickey.byname"; 66 #else 67 static char PKFILE[] = "/etc/publickey"; 68 #endif /* YP */ 69 static char ROOTKEY[] = "/etc/.rootkey"; 70 71 static void usage(char *); 72 static int setpublicmap(char *, char *, char *); 73 74 int 75 main(int argc, char **argv) 76 { 77 char name[MAXNETNAMELEN+1]; 78 char public[HEXKEYBYTES + 1]; 79 char secret[HEXKEYBYTES + 1]; 80 char crypt1[HEXKEYBYTES + KEYCHECKSUMSIZE + 1]; 81 char crypt2[HEXKEYBYTES + KEYCHECKSUMSIZE + 1]; 82 int status; 83 char *pass; 84 struct passwd *pw; 85 uid_t uid; 86 int force = 0; 87 char *self; 88 #ifdef YP 89 char *master; 90 #endif 91 92 self = argv[0]; 93 for (argc--, argv++; argc > 0 && **argv == '-'; argc--, argv++) { 94 if (argv[0][2] != 0) { 95 usage(self); 96 } 97 switch (argv[0][1]) { 98 case 'f': 99 force = 1; 100 break; 101 default: 102 usage(self); 103 } 104 } 105 if (argc != 0) { 106 usage(self); 107 } 108 109 #ifdef YP 110 (void)yp_get_default_domain(&domain); 111 if (yp_master(domain, PKMAP, &master) != 0) { 112 (void)fprintf(stderr, 113 "can't find master of publickey database\n"); 114 exit(1); 115 } 116 #endif 117 uid = getuid() /*geteuid()*/; 118 if (uid == 0) { 119 if (host2netname(name, NULL, NULL) == 0) { 120 (void)fprintf(stderr, 121 "chkey: cannot convert hostname to netname\n"); 122 exit(1); 123 } 124 } else { 125 if (user2netname(name, uid, NULL) == 0) { 126 (void)fprintf(stderr, 127 "chkey: cannot convert username to netname\n"); 128 exit(1); 129 } 130 } 131 (void)printf("Generating new key for %s.\n", name); 132 133 if (!force) { 134 if (uid != 0) { 135 #ifdef YPPASSWD 136 pw = ypgetpwuid(uid); 137 #else 138 pw = getpwuid(uid); 139 #endif 140 if (pw == NULL) { 141 #ifdef YPPASSWD 142 (void)fprintf(stderr, 143 "No NIS password entry found: can't change key.\n"); 144 #else 145 (void)fprintf(stderr, 146 "No password entry found: can't change key.\n"); 147 #endif 148 exit(1); 149 } 150 } else { 151 pw = getpwuid(0); 152 if (pw == NULL) { 153 (void)fprintf(stderr, 154 "No password entry found: can't change key.\n"); 155 exit(1); 156 } 157 } 158 } 159 pass = getpass("Password:"); 160 #ifdef YPPASSWD 161 if (!force) { 162 if (strcmp(crypt(pass, pw->pw_passwd), pw->pw_passwd) != 0) { 163 (void)fprintf(stderr, "Invalid password.\n"); 164 exit(1); 165 } 166 } 167 #else 168 force = 1; /* Make this mandatory */ 169 #endif 170 genkeys(public, secret, pass); 171 172 memcpy(crypt1, secret, HEXKEYBYTES); 173 memcpy(crypt1 + HEXKEYBYTES, secret, KEYCHECKSUMSIZE); 174 crypt1[HEXKEYBYTES + KEYCHECKSUMSIZE] = 0; 175 xencrypt(crypt1, pass); 176 177 if (force) { 178 memcpy(crypt2, crypt1, HEXKEYBYTES + KEYCHECKSUMSIZE + 1); 179 xdecrypt(crypt2, getpass("Retype password:")); 180 if (memcmp(crypt2, crypt2 + HEXKEYBYTES, KEYCHECKSUMSIZE) != 0 || 181 memcmp(crypt2, secret, HEXKEYBYTES) != 0) { 182 (void)fprintf(stderr, "Password incorrect.\n"); 183 exit(1); 184 } 185 } 186 187 #ifdef YP 188 (void)printf("Sending key change request to %s...\n", master); 189 #endif 190 status = setpublicmap(name, public, crypt1); 191 if (status != 0) { 192 #ifdef YP 193 (void)fprintf(stderr, 194 "%s: unable to update NIS database (%u): %s\n", 195 self, status, yperr_string(status)); 196 #else 197 (void)fprintf(stderr, 198 "%s: unable to update publickey database\n", self); 199 #endif 200 exit(1); 201 } 202 203 if (uid == 0) { 204 /* 205 * Root users store their key in /etc/$ROOTKEY so 206 * that they can auto reboot without having to be 207 * around to type a password. Storing this in a file 208 * is rather dubious: it should really be in the EEPROM 209 * so it does not go over the net. 210 */ 211 int fd; 212 213 fd = open(ROOTKEY, O_WRONLY|O_TRUNC|O_CREAT, 0); 214 if (fd < 0) { 215 perror(ROOTKEY); 216 } else { 217 char newline = '\n'; 218 219 if (write(fd, secret, strlen(secret)) < 0 || 220 write(fd, &newline, sizeof(newline)) < 0) { 221 (void)fprintf(stderr, "%s: ", ROOTKEY); 222 perror("write"); 223 } 224 } 225 } 226 227 if (key_setsecret(secret) < 0) { 228 (void)printf("Unable to login with new secret key.\n"); 229 exit(1); 230 } 231 (void)printf("Done.\n"); 232 exit(0); 233 /* NOTREACHED */ 234 } 235 236 static void 237 usage(char *name) 238 { 239 (void)fprintf(stderr, "usage: %s [-f]\n", name); 240 exit(1); 241 /* NOTREACHED */ 242 } 243 244 245 /* 246 * Set the entry in the public key file 247 */ 248 static int 249 setpublicmap(char *name, char *public, char *secret) 250 { 251 char pkent[1024]; 252 253 (void)sprintf(pkent,"%s:%s", public, secret); 254 #ifdef YP 255 return (yp_update(domain, PKMAP, YPOP_STORE, 256 name, strlen(name), pkent, strlen(pkent))); 257 #else 258 return (localupdate(name, PKFILE, YPOP_STORE, 259 strlen(name), name, strlen(pkent), pkent)); 260 #endif 261 } 262 263 #ifdef YPPASSWD 264 static struct passwd * 265 ypgetpwuid(uid_t uid) 266 { 267 char uidstr[10]; 268 char *val; 269 int vallen; 270 static struct passwd pw; 271 char *p; 272 273 (void)sprintf(uidstr, "%d", uid); 274 if (yp_match(domain, "passwd.byuid", uidstr, strlen(uidstr), 275 &val, &vallen) != 0) { 276 return (NULL); 277 } 278 p = strchr(val, ':'); 279 if (p == NULL) { 280 return (NULL); 281 } 282 pw.pw_passwd = p + 1; 283 p = strchr(pw.pw_passwd, ':'); 284 if (p == NULL) { 285 return (NULL); 286 } 287 *p = 0; 288 return (&pw); 289 } 290 #endif /* YPPASSWD */ 291