lib/librpcsvc/secretkey.c

   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, MERCHANTIBILITY 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  * @(#)secretkey.c 1.8 91/03/11 Copyr 1986 Sun Micro
  31  * $FreeBSD: src/lib/librpcsvc/secretkey.c,v 1.3 2002/03/21 23:53:40 obrien Exp $
  32  * $DragonFly: src/lib/librpcsvc/secretkey.c,v 1.5 2007/11/25 14:33:02 swildner Exp $
  33  */
  34
  35 /*
  36  * secretkey.c
  37  * Copyright (C) 1986, Sun Microsystems, Inc.
  38  */
  39
  40 /*
  41  * Secret key lookup routines
  42  */
  43 #include <stdio.h>
  44 #include <pwd.h>
  45 #include <rpc/rpc.h>
  46 #include <rpc/key_prot.h>
  47 #include <rpcsvc/yp_prot.h>
  48 #include <rpcsvc/ypclnt.h>
  49 #include <string.h>
  50
  51 extern int xdecrypt(char *, char *);
  52
  53 /*
  54  * Get somebody's encrypted secret key from the database, using the given
  55  * passwd to decrypt it.
  56  */
  57 int
  58 getsecretkey(char *netname, char *secretkey, char *passwd)
  59 {
  60         char lookup[3 * HEXKEYBYTES];
  61         char *p;
  62
  63         if (secretkey == NULL)
  64                 return (0);
  65         if (!getpublicandprivatekey(netname, lookup))
  66                 return (0);
  67         p = strchr(lookup, ':');
  68         if (p == NULL) {
  69                 return (0);
  70         }
  71         p++;
  72         if (!xdecrypt(p, passwd)) {
  73                 return (0);
  74         }
  75         if (memcmp(p, p + HEXKEYBYTES, KEYCHECKSUMSIZE) != 0) {
  76                 secretkey[0] = '\0';
  77                 return (1);
  78         }
  79         p[HEXKEYBYTES] = '\0';
  80         strncpy(secretkey, p, HEXKEYBYTES);
  81         secretkey[HEXKEYBYTES] = '\0';
  82         return (1);
  83 }