/* * Sun RPC is a product of Sun Microsystems, Inc. and is provided for * unrestricted use provided that this legend is included on all tape * media and as a part of the software program in whole or part. Users * may copy or modify Sun RPC without charge, but are not authorized * to license or distribute it to anyone else except as part of a product or * program developed by the user or with the express written consent of * Sun Microsystems, Inc. * * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE * WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. * * Sun RPC is provided with no support and without any obligation on the * part of Sun Microsystems, Inc. to assist in its use, correction, * modification or enhancement. * * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC * OR ANY PART THEREOF. * * In no event will Sun Microsystems, Inc. be liable for any lost revenue * or profits or other special, indirect and consequential damages, even if * Sun has been advised of the possibility of such damages. * * Sun Microsystems, Inc. * 2550 Garcia Avenue * Mountain View, California 94043 */ #if 0 #ifndef lint static char sccsid[] = "@(#)chkey.c 1.7 91/03/11 Copyr 1986 Sun Micro"; #endif #endif #include __FBSDID("$FreeBSD$"); /* * Copyright (C) 1986, Sun Microsystems, Inc. */ /* * Command to change one's public key in the public key database */ #include #include #ifdef YP #include #include #else #define YPOP_STORE 4 #endif #include #include #include #include #include #include #include #include "extern.h" #ifdef YPPASSWD struct passwd *ypgetpwuid(uid_t); #endif #ifdef YP static char *domain; static char PKMAP[] = "publickey.byname"; #else static char PKFILE[] = "/etc/publickey"; #endif /* YP */ static char ROOTKEY[] = "/etc/.rootkey"; static void usage(void); extern int yp_update(char *, char *, int, char *, size_t, char *, size_t); int main(int argc, char **argv) { char name[MAXNETNAMELEN+1]; char public[HEXKEYBYTES + 1]; char secret[HEXKEYBYTES + 1]; char crypt1[HEXKEYBYTES + KEYCHECKSUMSIZE + 1]; char crypt2[HEXKEYBYTES + KEYCHECKSUMSIZE + 1]; int status; char *pass; struct passwd *pw; uid_t uid; int force = 0; int ch; #ifdef YP char *master; #endif #ifdef YPPASSWD char *cryptpw; #endif while ((ch = getopt(argc, argv, "f")) != -1) switch(ch) { case 'f': force = 1; break; default: usage(); } argc -= optind; argv += optind; if (argc != 0) usage(); #ifdef YP (void)yp_get_default_domain(&domain); if (yp_master(domain, PKMAP, &master) != 0) errx(1, "can't find master of publickey database"); #endif uid = getuid() /*geteuid()*/; if (uid == 0) { if (host2netname(name, NULL, NULL) == 0) errx(1, "cannot convert hostname to netname"); } else { if (user2netname(name, uid, NULL) == 0) errx(1, "cannot convert username to netname"); } (void)printf("Generating new key for %s.\n", name); if (!force) { if (uid != 0) { #ifdef YPPASSWD pw = ypgetpwuid(uid); #else pw = getpwuid(uid); #endif if (pw == NULL) { #ifdef YPPASSWD errx(1, "no NIS password entry found: can't change key"); #else errx(1, "no password entry found: can't change key"); #endif } } else { pw = getpwuid(0); if (pw == NULL) errx(1, "no password entry found: can't change key"); } } pass = getpass("Password:"); #ifdef YPPASSWD if (!force) { cryptpw = crypt(pass, pw->pw_passwd); if (cryptpw == NULL || strcmp(cryptpw, pw->pw_passwd) != 0) errx(1, "invalid password"); } #else force = 1; /* Make this mandatory */ #endif genkeys(public, secret, pass); memcpy(crypt1, secret, HEXKEYBYTES); memcpy(crypt1 + HEXKEYBYTES, secret, KEYCHECKSUMSIZE); crypt1[HEXKEYBYTES + KEYCHECKSUMSIZE] = 0; xencrypt(crypt1, pass); if (force) { memcpy(crypt2, crypt1, HEXKEYBYTES + KEYCHECKSUMSIZE + 1); xdecrypt(crypt2, getpass("Retype password:")); if (memcmp(crypt2, crypt2 + HEXKEYBYTES, KEYCHECKSUMSIZE) != 0 || memcmp(crypt2, secret, HEXKEYBYTES) != 0) errx(1, "password incorrect"); } #ifdef YP (void)printf("Sending key change request to %s...\n", master); #endif status = setpublicmap(name, public, crypt1); if (status != 0) { #ifdef YP errx(1, "unable to update NIS database (%u): %s", status, yperr_string(status)); #else errx(1, "unable to update publickey database"); #endif } if (uid == 0) { /* * Root users store their key in /etc/$ROOTKEY so * that they can auto reboot without having to be * around to type a password. Storing this in a file * is rather dubious: it should really be in the EEPROM * so it does not go over the net. */ int fd; fd = open(ROOTKEY, O_WRONLY|O_TRUNC|O_CREAT, 0); if (fd < 0) { warn("%s", ROOTKEY); } else { char newline = '\n'; if (write(fd, secret, strlen(secret)) < 0 || write(fd, &newline, sizeof(newline)) < 0) warn("%s: write", ROOTKEY); } close(fd); } if (key_setsecret(secret) < 0) errx(1, "unable to login with new secret key"); (void)printf("Done.\n"); exit(0); /* NOTREACHED */ } static void usage(void) { (void)fprintf(stderr, "usage: chkey [-f]\n"); exit(1); /* NOTREACHED */ } /* * Set the entry in the public key file */ int setpublicmap(char *name, char *public, char *secret) { char pkent[1024]; (void)sprintf(pkent,"%s:%s", public, secret); #ifdef YP return (yp_update(domain, PKMAP, YPOP_STORE, name, strlen(name), pkent, strlen(pkent))); #else return (localupdate(name, PKFILE, YPOP_STORE, strlen(name), name, strlen(pkent), pkent)); #endif } #ifdef YPPASSWD struct passwd * ypgetpwuid(uid_t uid) { char uidstr[10]; char *val; int vallen; static struct passwd pw; char *p; (void)sprintf(uidstr, "%d", uid); if (yp_match(domain, "passwd.byuid", uidstr, strlen(uidstr), &val, &vallen) != 0) { return (NULL); } p = strchr(val, ':'); if (p == NULL) { return (NULL); } pw.pw_passwd = p + 1; p = strchr(pw.pw_passwd, ':'); if (p == NULL) { return (NULL); } *p = 0; return (&pw); } #endif /* YPPASSWD */