/*
 * 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
 *
 * @(#)newkey.c 1.8 91/03/11 Copyr 1986 Sun Micro
 * $FreeBSD: src/usr.bin/newkey/newkey.c,v 1.3 1999/08/28 01:04:34 peter Exp $
 */

/*
 * Copyright (C) 1986, Sun Microsystems, Inc.
 */

/*
 * Administrative tool to add a new user to the publickey database
 */
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <err.h>
#include <pwd.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <rpc/rpc.h>
#include <rpc/key_prot.h>
#ifdef YP
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#include <sys/wait.h>
#include <netdb.h>
#endif  /* YP */

#include "externs.h"

#ifdef YP
#define MAXMAPNAMELEN 256
#else
#define YPOP_CHANGE 1                   /* change, do not add */
#define YPOP_INSERT 2                   /* add, do not change */
#define YPOP_DELETE 3                   /* delete this entry */
#define YPOP_STORE  4                   /* add, or change */
#define ERR_ACCESS      1
#define ERR_MALLOC      2
#define ERR_READ        3
#define ERR_WRITE       4
#define ERR_DBASE       5
#define ERR_KEY         6
#endif

#ifdef YP
static char YPDBPATH[]="/var/yp";
static char PKMAP[] = "publickey.byname";
#else
static char PKFILE[] = "/etc/publickey";
static const char       *err_string(int);
#endif  /* YP */

static int      setpublicmap(char *, char *, char *);
static void     usage(void);

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;
#ifdef undef
        struct hostent *h;
#endif

        if (argc != 3 || !(strcmp(argv[1], "-u") == 0 ||
                strcmp(argv[1], "-h") == 0)) {
                usage();
        }
        if (geteuid() != 0)
                errx(1, "must be superuser");

#ifdef YP
        if (chdir(YPDBPATH) < 0)
                warn("cannot chdir to %s", YPDBPATH);
#endif  /* YP */
        if (strcmp(argv[1], "-u") == 0) {
                pw = getpwnam(argv[2]);
                if (pw == NULL)
                        errx(1, "unknown user: %s", argv[2]);
                (void)user2netname(name, (int)pw->pw_uid, NULL);
        } else {
#ifdef undef
                h = gethostbyname(argv[2]);
                if (h == NULL)
                        errx(1, "unknown host: %s", argv[1]);
                (void)host2netname(name, h->h_name, NULL);
#else
                (void)host2netname(name, argv[2], NULL);
#endif
        }

        (void)printf("Adding new key for %s.\n", name);
        pass = getpass("New password:");
        genkeys(public, secret, pass);

        memcpy(crypt1, secret, HEXKEYBYTES);
        memcpy(crypt1 + HEXKEYBYTES, secret, KEYCHECKSUMSIZE);
        crypt1[HEXKEYBYTES + KEYCHECKSUMSIZE] = 0;
        xencrypt(crypt1, pass);

        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("Please wait for the database to get updated...\n");
#endif
        if ((status = setpublicmap(name, public, crypt1))) {
#ifdef YP
                errx(1, "unable to update NIS database (%u): %s", 
                        status, yperr_string(status));
#else
                errx(1, "unable to update publickey database (%u): %s",
                        status, err_string(status));
#endif
        }
        (void)printf("Your new key has been successfully stored away.\n");
        exit(0);
        /* NOTREACHED */
}

static void
usage(void)
{
        (void)fprintf(stderr, "%s\n%s\n",
                "usage: newkey [-u username]",
                "       newkey [-h hostname]");
        exit(1);
}

/*
 * Set the entry in the public key file
 */
static int
setpublicmap(char *name, char *public, char *secret)
{
        char pkent[1024];

        (void)sprintf(pkent, "%s:%s", public, secret);
#ifdef YP
        return (mapupdate(name, PKMAP, YPOP_STORE,
                strlen(name), name, strlen(pkent), pkent));
#else
        return (localupdate(name, PKFILE, YPOP_STORE, name, pkent));
#endif
        }
 
#ifndef YP
        /*
         * This returns a pointer to an error message string appropriate
         * to an input error code.  An input value of zero will return
         * a success message.
         */
static const char *
err_string(int code)
{
        const char *pmesg;

        switch (code) {
        case 0:
                pmesg = "update operation succeeded";
                break;
        case ERR_KEY:
                pmesg = "no such key in file";
                break;
        case ERR_READ:
                pmesg = "cannot read the database";
                break;
        case ERR_WRITE:
                pmesg = "cannot write to the database";
                break;
        case ERR_DBASE:
                pmesg = "cannot update database";
                break;
        case ERR_ACCESS:
                pmesg = "permission denied";
                break;
        case ERR_MALLOC:
                pmesg = "malloc failed";
                break;
        default:
                pmesg = "unknown error";
                break;
        }
        return (pmesg);
}
#endif