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 /* 39 * Copyright (C) 1986, Sun Microsystems, Inc. 40 */ 41 42 /* 43 * Command to change one's public key in the public key database 44 */ 45 #include <rpc/rpc.h> 46 #include <rpc/key_prot.h> 47 #ifdef YP 48 #include <rpcsvc/yp_prot.h> 49 #include <rpcsvc/ypclnt.h> 50 #else 51 #define YPOP_STORE 4 52 #endif 53 #include <sys/fcntl.h> 54 #include <err.h> 55 #include <pwd.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <unistd.h> 60 61 #include "extern.h" 62 63 #ifdef YPPASSWD 64 struct passwd *ypgetpwuid(uid_t); 65 #endif 66 67 #ifdef YP 68 static char *domain; 69 static char PKMAP[] = "publickey.byname"; 70 #else 71 static char PKFILE[] = "/etc/publickey"; 72 #endif /* YP */ 73 static char ROOTKEY[] = "/etc/.rootkey"; 74 75 static void usage(void) __dead2; 76 extern int yp_update(char *, char *, int, char *, size_t, char *, size_t); 77 78 int 79 main(int argc, char **argv) 80 { 81 char name[MAXNETNAMELEN+1]; 82 char public[HEXKEYBYTES + 1]; 83 char secret[HEXKEYBYTES + 1]; 84 char crypt1[HEXKEYBYTES + KEYCHECKSUMSIZE + 1]; 85 char crypt2[HEXKEYBYTES + KEYCHECKSUMSIZE + 1]; 86 int status; 87 char *pass; 88 struct passwd *pw; 89 uid_t uid; 90 int force = 0; 91 int ch; 92 #ifdef YP 93 char *master; 94 #endif 95 #ifdef YPPASSWD 96 char *cryptpw; 97 #endif 98 99 while ((ch = getopt(argc, argv, "f")) != -1) 100 switch(ch) { 101 case 'f': 102 force = 1; 103 break; 104 default: 105 usage(); 106 } 107 argc -= optind; 108 argv += optind; 109 110 if (argc != 0) 111 usage(); 112 113 #ifdef YP 114 (void)yp_get_default_domain(&domain); 115 if (yp_master(domain, PKMAP, &master) != 0) 116 errx(1, "can't find master of publickey database"); 117 #endif 118 uid = getuid() /*geteuid()*/; 119 if (uid == 0) { 120 if (host2netname(name, NULL, NULL) == 0) 121 errx(1, "cannot convert hostname to netname"); 122 } else { 123 if (user2netname(name, uid, NULL) == 0) 124 errx(1, "cannot convert username to netname"); 125 } 126 (void)printf("Generating new key for %s.\n", name); 127 128 if (!force) { 129 if (uid != 0) { 130 #ifdef YPPASSWD 131 pw = ypgetpwuid(uid); 132 #else 133 pw = getpwuid(uid); 134 #endif 135 if (pw == NULL) { 136 #ifdef YPPASSWD 137 errx(1, 138 "no NIS password entry found: can't change key"); 139 #else 140 errx(1, 141 "no password entry found: can't change key"); 142 #endif 143 } 144 } else { 145 pw = getpwuid(0); 146 if (pw == NULL) 147 errx(1, "no password entry found: can't change key"); 148 } 149 } 150 pass = getpass("Password:"); 151 #ifdef YPPASSWD 152 if (!force) { 153 cryptpw = crypt(pass, pw->pw_passwd); 154 if (cryptpw == NULL || strcmp(cryptpw, pw->pw_passwd) != 0) 155 errx(1, "invalid password"); 156 } 157 #else 158 force = 1; /* Make this mandatory */ 159 #endif 160 genkeys(public, secret, pass); 161 162 memcpy(crypt1, secret, HEXKEYBYTES); 163 memcpy(crypt1 + HEXKEYBYTES, secret, KEYCHECKSUMSIZE); 164 crypt1[HEXKEYBYTES + KEYCHECKSUMSIZE] = 0; 165 xencrypt(crypt1, pass); 166 167 if (force) { 168 memcpy(crypt2, crypt1, HEXKEYBYTES + KEYCHECKSUMSIZE + 1); 169 xdecrypt(crypt2, getpass("Retype password:")); 170 if (memcmp(crypt2, crypt2 + HEXKEYBYTES, KEYCHECKSUMSIZE) != 0 171 || memcmp(crypt2, secret, HEXKEYBYTES) != 0) 172 errx(1, "password incorrect"); 173 } 174 175 #ifdef YP 176 (void)printf("Sending key change request to %s...\n", master); 177 #endif 178 status = setpublicmap(name, public, crypt1); 179 if (status != 0) { 180 #ifdef YP 181 errx(1, "unable to update NIS database (%u): %s", 182 status, yperr_string(status)); 183 #else 184 errx(1, "unable to update publickey database"); 185 #endif 186 } 187 188 if (uid == 0) { 189 /* 190 * Root users store their key in /etc/$ROOTKEY so 191 * that they can auto reboot without having to be 192 * around to type a password. Storing this in a file 193 * is rather dubious: it should really be in the EEPROM 194 * so it does not go over the net. 195 */ 196 int fd; 197 198 fd = open(ROOTKEY, O_WRONLY|O_TRUNC|O_CREAT, 0); 199 if (fd < 0) { 200 warn("%s", ROOTKEY); 201 } else { 202 char newline = '\n'; 203 204 if (write(fd, secret, strlen(secret)) < 0 || 205 write(fd, &newline, sizeof(newline)) < 0) 206 warn("%s: write", ROOTKEY); 207 } 208 close(fd); 209 } 210 211 if (key_setsecret(secret) < 0) 212 errx(1, "unable to login with new secret key"); 213 (void)printf("Done.\n"); 214 exit(0); 215 /* NOTREACHED */ 216 } 217 218 static void 219 usage(void) 220 { 221 (void)fprintf(stderr, "usage: chkey [-f]\n"); 222 exit(1); 223 /* NOTREACHED */ 224 } 225 226 227 /* 228 * Set the entry in the public key file 229 */ 230 int 231 setpublicmap(char *name, char *public, char *secret) 232 { 233 char pkent[1024]; 234 235 (void)sprintf(pkent,"%s:%s", public, secret); 236 #ifdef YP 237 return (yp_update(domain, PKMAP, YPOP_STORE, 238 name, strlen(name), pkent, strlen(pkent))); 239 #else 240 return (localupdate(name, PKFILE, YPOP_STORE, 241 strlen(name), name, strlen(pkent), pkent)); 242 #endif 243 } 244 245 #ifdef YPPASSWD 246 struct passwd * 247 ypgetpwuid(uid_t uid) 248 { 249 char uidstr[10]; 250 char *val; 251 int vallen; 252 static struct passwd pw; 253 char *p; 254 255 (void)sprintf(uidstr, "%d", uid); 256 if (yp_match(domain, "passwd.byuid", uidstr, strlen(uidstr), 257 &val, &vallen) != 0) { 258 return (NULL); 259 } 260 p = strchr(val, ':'); 261 if (p == NULL) { 262 return (NULL); 263 } 264 pw.pw_passwd = p + 1; 265 p = strchr(pw.pw_passwd, ':'); 266 if (p == NULL) { 267 return (NULL); 268 } 269 *p = 0; 270 return (&pw); 271 } 272 #endif /* YPPASSWD */ 273