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forward.c revision 1.2 
      1 /*
      2  * appl/telnet/libtelnet/forward.c
      3  */
      4 
      5 /*
      6  * Copyright (c) 1983 Regents of the University of California.
      7  * All rights reserved.
      8  *
      9  * Redistribution and use in source and binary forms are permitted
     10  * provided that the above copyright notice and this paragraph are
     11  * duplicated in all such forms and that any documentation,
     12  * advertising materials, and other materials related to such
     13  * distribution and use acknowledge that the software was developed
     14  * by the University of California, Berkeley.  The name of the
     15  * University may not be used to endorse or promote products derived
     16  * from this software without specific prior written permission.
     17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
     19  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     20  */
     21 
     22 
     23 /* General-purpose forwarding routines. These routines may be put into */
     24 /* libkrb5.a to allow widespread use */
     25 
     26 #if defined(KERBEROS) || defined(KRB5)
     27 #include <stdio.h>
     28 #include <netdb.h>
     29 
     30 #include "k5-int.h"
     31 
     32 extern char *line;		/* see sys_term.c */
     33 
     34 #ifdef __P
     35 krb5_error_code rd_and_store_for_creds __P((krb5_context, krb5_auth_context, krb5_data *, krb5_ticket *));
     36 #endif
     37 
     38 /* Decode, decrypt and store the forwarded creds in the local ccache. */
     39 krb5_error_code
     40 rd_and_store_for_creds(context, auth_context, inbuf, ticket)
     41     krb5_context context;
     42     krb5_auth_context auth_context;
     43     krb5_data *inbuf;
     44     krb5_ticket *ticket;
     45 {
     46     krb5_creds **creds;
     47     krb5_error_code retval;
     48     char ccname[35];
     49     krb5_ccache ccache = NULL;
     50 
     51     if ((retval = krb5_rd_cred(context, auth_context, inbuf, &creds, NULL)) != 0)
     52 	return(retval);
     53 
     54     snprintf(ccname, sizeof(ccname), "FILE:/tmp/krb5cc_p%d", getpid());
     55     setenv(KRB5_ENV_CCNAME, ccname, 1);
     56 
     57     if ((retval = krb5_cc_resolve(context, ccname, &ccache)) != 0)
     58 	goto cleanup;
     59 
     60     if ((retval = krb5_cc_initialize(context, ccache, ticket->enc_part2->client)) != 0)
     61 	goto cleanup;
     62 
     63     if ((retval = krb5_cc_store_cred(context, ccache, *creds)) != 0)
     64 	goto cleanup;
     65 
     66 cleanup:
     67     krb5_free_creds(context, *creds);
     68     return retval;
     69 }
     70 
     71 #endif /* defined(KRB5) && defined(FORWARD) */
     72