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