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 98 while ((ch = getopt(argc, argv, "f")) != -1) 99 switch(ch) { 100 case 'f': 101 force = 1; 102 break; 103 default: 104 usage(); 105 } 106 argc -= optind; 107 argv += optind; 108 109 if (argc != 0) 110 usage(); 111 112 #ifdef YP 113 (void)yp_get_default_domain(&domain); 114 if (yp_master(domain, PKMAP, &master) != 0) 115 errx(1, "can't find master of publickey database"); 116 #endif 117 uid = getuid() /*geteuid()*/; 118 if (uid == 0) { 119 if (host2netname(name, NULL, NULL) == 0) 120 errx(1, "cannot convert hostname to netname"); 121 } else { 122 if (user2netname(name, uid, NULL) == 0) 123 errx(1, "cannot convert username to netname"); 124 } 125 (void)printf("Generating new key for %s.\n", name); 126 127 if (!force) { 128 if (uid != 0) { 129 #ifdef YPPASSWD 130 pw = ypgetpwuid(uid); 131 #else 132 pw = getpwuid(uid); 133 #endif 134 if (pw == NULL) { 135 #ifdef YPPASSWD 136 errx(1, 137 "no NIS password entry found: can't change key"); 138 #else 139 errx(1, 140 "no password entry found: can't change key"); 141 #endif 142 } 143 } else { 144 pw = getpwuid(0); 145 if (pw == NULL) 146 errx(1, "no password entry found: can't change key"); 147 } 148 } 149 pass = getpass("Password:"); 150 #ifdef YPPASSWD 151 if (!force) { 152 if (strcmp(crypt(pass, pw->pw_passwd), pw->pw_passwd) != 0) 153 errx(1, "invalid password"); 154 } 155 #else 156 force = 1; /* Make this mandatory */ 157 #endif 158 genkeys(public, secret, pass); 159 160 memcpy(crypt1, secret, HEXKEYBYTES); 161 memcpy(crypt1 + HEXKEYBYTES, secret, KEYCHECKSUMSIZE); 162 crypt1[HEXKEYBYTES + KEYCHECKSUMSIZE] = 0; 163 xencrypt(crypt1, pass); 164 165 if (force) { 166 memcpy(crypt2, crypt1, HEXKEYBYTES + KEYCHECKSUMSIZE + 1); 167 xdecrypt(crypt2, getpass("Retype password:")); 168 if (memcmp(crypt2, crypt2 + HEXKEYBYTES, KEYCHECKSUMSIZE) != 0 169 || memcmp(crypt2, secret, HEXKEYBYTES) != 0) 170 errx(1, "password incorrect"); 171 } 172 173 #ifdef YP 174 (void)printf("Sending key change request to %s...\n", master); 175 #endif 176 status = setpublicmap(name, public, crypt1); 177 if (status != 0) { 178 #ifdef YP 179 errx(1, "unable to update NIS database (%u): %s", 180 status, yperr_string(status)); 181 #else 182 errx(1, "unable to update publickey database"); 183 #endif 184 } 185 186 if (uid == 0) { 187 /* 188 * Root users store their key in /etc/$ROOTKEY so 189 * that they can auto reboot without having to be 190 * around to type a password. Storing this in a file 191 * is rather dubious: it should really be in the EEPROM 192 * so it does not go over the net. 193 */ 194 int fd; 195 196 fd = open(ROOTKEY, O_WRONLY|O_TRUNC|O_CREAT, 0); 197 if (fd < 0) { 198 warn("%s", ROOTKEY); 199 } else { 200 char newline = '\n'; 201 202 if (write(fd, secret, strlen(secret)) < 0 || 203 write(fd, &newline, sizeof(newline)) < 0) 204 warn("%s: write", ROOTKEY); 205 } 206 close(fd); 207 } 208 209 if (key_setsecret(secret) < 0) 210 errx(1, "unable to login with new secret key"); 211 (void)printf("Done.\n"); 212 exit(0); 213 /* NOTREACHED */ 214 } 215 216 static void 217 usage(void) 218 { 219 (void)fprintf(stderr, "usage: chkey [-f]\n"); 220 exit(1); 221 /* NOTREACHED */ 222 } 223 224 225 /* 226 * Set the entry in the public key file 227 */ 228 int 229 setpublicmap(char *name, char *public, char *secret) 230 { 231 char pkent[1024]; 232 233 (void)sprintf(pkent,"%s:%s", public, secret); 234 #ifdef YP 235 return (yp_update(domain, PKMAP, YPOP_STORE, 236 name, strlen(name), pkent, strlen(pkent))); 237 #else 238 return (localupdate(name, PKFILE, YPOP_STORE, 239 strlen(name), name, strlen(pkent), pkent)); 240 #endif 241 } 242 243 #ifdef YPPASSWD 244 struct passwd * 245 ypgetpwuid(uid_t uid) 246 { 247 char uidstr[10]; 248 char *val; 249 int vallen; 250 static struct passwd pw; 251 char *p; 252 253 (void)sprintf(uidstr, "%d", uid); 254 if (yp_match(domain, "passwd.byuid", uidstr, strlen(uidstr), 255 &val, &vallen) != 0) { 256 return (NULL); 257 } 258 p = strchr(val, ':'); 259 if (p == NULL) { 260 return (NULL); 261 } 262 pw.pw_passwd = p + 1; 263 p = strchr(pw.pw_passwd, ':'); 264 if (p == NULL) { 265 return (NULL); 266 } 267 *p = 0; 268 return (&pw); 269 } 270 #endif /* YPPASSWD */ 271