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 * $DragonFly: src/usr.bin/chkey/chkey.c,v 1.6 2008/11/11 18:06:12 pavalos 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 <err.h> 42 #include <pwd.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 48 #include <rpc/rpc.h> 49 #include <rpc/key_prot.h> 50 #ifdef YP 51 #include <rpcsvc/yp_prot.h> 52 #include <rpcsvc/ypclnt.h> 53 #include <rpcsvc/yppasswd.h> 54 #else 55 #define YPOP_STORE 4 56 #endif 57 58 #include "externs.h" 59 60 #ifdef YPPASSWD 61 static struct passwd *ypgetpwuid(uid_t); 62 #endif 63 64 #ifdef YP 65 static char *domain; 66 static char PKMAP[] = "publickey.byname"; 67 #else 68 static char PKFILE[] = "/etc/publickey"; 69 #endif /* YP */ 70 static char ROOTKEY[] = "/etc/.rootkey"; 71 72 static void usage(void); 73 static int setpublicmap(char *, char *, char *); 74 75 int 76 main(int argc, char **argv) 77 { 78 char name[MAXNETNAMELEN+1]; 79 char public[HEXKEYBYTES + 1]; 80 char secret[HEXKEYBYTES + 1]; 81 char crypt1[HEXKEYBYTES + KEYCHECKSUMSIZE + 1]; 82 char crypt2[HEXKEYBYTES + KEYCHECKSUMSIZE + 1]; 83 int status; 84 char *pass; 85 struct passwd *pw; 86 uid_t uid; 87 int force = 0; 88 int ch; 89 #ifdef YP 90 char *master; 91 #endif 92 #ifdef YPPASSWD 93 char *cryptpw; 94 #endif 95 96 while ((ch = getopt(argc, argv, "f")) != -1) 97 switch(ch) { 98 case 'f': 99 force = 1; 100 break; 101 default: 102 usage(); 103 } 104 argc -= optind; 105 argv += optind; 106 107 if (argc != 0) 108 usage(); 109 110 #ifdef YP 111 yp_get_default_domain(&domain); 112 if (yp_master(domain, PKMAP, &master) != 0) 113 errx(1, "can't find master of publickey database"); 114 #endif 115 uid = getuid() /*geteuid()*/; 116 if (uid == 0) { 117 if (host2netname(name, NULL, NULL) == 0) 118 errx(1, "cannot convert hostname to netname"); 119 } else { 120 if (user2netname(name, uid, NULL) == 0) 121 errx(1, "cannot convert username to netname"); 122 } 123 printf("Generating new key for %s.\n", name); 124 125 if (!force) { 126 if (uid != 0) { 127 #ifdef YPPASSWD 128 pw = ypgetpwuid(uid); 129 #else 130 pw = getpwuid(uid); 131 #endif 132 if (pw == NULL) { 133 #ifdef YPPASSWD 134 errx(1, 135 "no NIS password entry found: can't change key"); 136 #else 137 errx(1, 138 "no password entry found: can't change key"); 139 #endif 140 } 141 } else { 142 pw = getpwuid(0); 143 if (pw == NULL) 144 errx(1, "no password entry found: can't change key"); 145 } 146 } 147 pass = getpass("Password:"); 148 #ifdef YPPASSWD 149 if (!force) { 150 cryptpw = crypt(pass, pw->pw_passwd); 151 if (cryptpw == NULL || strcmp(cryptpw, pw->pw_passwd) != 0) 152 errx(1, "invalid password"); 153 } 154 #else 155 force = 1; /* Make this mandatory */ 156 #endif 157 genkeys(public, secret, pass); 158 159 memcpy(crypt1, secret, HEXKEYBYTES); 160 memcpy(crypt1 + HEXKEYBYTES, secret, KEYCHECKSUMSIZE); 161 crypt1[HEXKEYBYTES + KEYCHECKSUMSIZE] = 0; 162 xencrypt(crypt1, pass); 163 164 if (force) { 165 memcpy(crypt2, crypt1, HEXKEYBYTES + KEYCHECKSUMSIZE + 1); 166 xdecrypt(crypt2, getpass("Retype password:")); 167 if (memcmp(crypt2, crypt2 + HEXKEYBYTES, KEYCHECKSUMSIZE) != 0 || 168 memcmp(crypt2, secret, HEXKEYBYTES) != 0) 169 errx(1, "password incorrect"); 170 } 171 172 #ifdef YP 173 printf("Sending key change request to %s...\n", master); 174 #endif 175 status = setpublicmap(name, public, crypt1); 176 if (status != 0) { 177 #ifdef YP 178 errx(1, "unable to update NIS database (%u): %s", 179 status, yperr_string(status)); 180 #else 181 errx(1, "unable to update publickey database"); 182 #endif 183 } 184 185 if (uid == 0) { 186 /* 187 * Root users store their key in /etc/$ROOTKEY so 188 * that they can auto reboot without having to be 189 * around to type a password. Storing this in a file 190 * is rather dubious: it should really be in the EEPROM 191 * so it does not go over the net. 192 */ 193 int fd; 194 195 fd = open(ROOTKEY, O_WRONLY|O_TRUNC|O_CREAT, 0); 196 if (fd < 0) { 197 warn("%s", ROOTKEY); 198 } else { 199 char newline = '\n'; 200 201 if (write(fd, secret, strlen(secret)) < 0 || 202 write(fd, &newline, sizeof(newline)) < 0) 203 warn("%s: write", ROOTKEY); 204 } 205 } 206 207 if (key_setsecret(secret) < 0) 208 errx(1, "unable to login with new secret key"); 209 printf("Done.\n"); 210 exit(0); 211 /* NOTREACHED */ 212 } 213 214 static void 215 usage(void) 216 { 217 fprintf(stderr, "usage: chkey [-f]\n"); 218 exit(1); 219 /* NOTREACHED */ 220 } 221 222 223 /* 224 * Set the entry in the public key file 225 */ 226 static int 227 setpublicmap(char *name, char *public, char *secret) 228 { 229 char pkent[1024]; 230 231 sprintf(pkent,"%s:%s", public, secret); 232 #ifdef YP 233 return (yp_update(domain, PKMAP, YPOP_STORE, 234 name, strlen(name), pkent, strlen(pkent))); 235 #else 236 return (localupdate(name, PKFILE, YPOP_STORE, 237 strlen(name), name, strlen(pkent), pkent)); 238 #endif 239 } 240 241 #ifdef YPPASSWD 242 static struct passwd * 243 ypgetpwuid(uid_t uid) 244 { 245 char uidstr[10]; 246 char *val; 247 int vallen; 248 static struct passwd pw; 249 char *p; 250 251 sprintf(uidstr, "%d", uid); 252 if (yp_match(domain, "passwd.byuid", uidstr, strlen(uidstr), 253 &val, &vallen) != 0) { 254 return (NULL); 255 } 256 p = strchr(val, ':'); 257 if (p == NULL) { 258 return (NULL); 259 } 260 pw.pw_passwd = p + 1; 261 p = strchr(pw.pw_passwd, ':'); 262 if (p == NULL) { 263 return (NULL); 264 } 265 *p = 0; 266 return (&pw); 267 } 268 #endif /* YPPASSWD */ 269