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/*
* lib/krb5/krb/srv_rcache.c
*
* Copyright 1991 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
*
* Allocate & prepare a default replay cache for a server.
*/
#include "k5-int.h"
#include <ctype.h>
#include <stdio.h>
KRB5_DLLIMP krb5_error_code KRB5_CALLCONV
krb5_get_server_rcache(context, piece, rcptr)
krb5_context context;
const krb5_data *piece;
krb5_rcache *rcptr;
{
krb5_rcache rcache = 0;
char *cachename = 0;
char tmp[4];
krb5_error_code retval;
int len, p, i;
#ifdef HAVE_GETEUID
unsigned long tens;
unsigned long uid = geteuid();
#endif
rcache = (krb5_rcache) malloc(sizeof(*rcache));
if (!rcache)
return ENOMEM;
retval = krb5_rc_resolve_type(context, &rcache,
krb5_rc_default_type(context));
if (retval) goto cleanup;
len = piece->length + 3 + 1;
for (i = 0; i < piece->length; i++) {
if (piece->data[i] == '\\')
len++;
else if (!isgraph(piece->data[i]))
len += 3;
}
#ifdef HAVE_GETEUID
len += 2; /* _<uid> */
for (tens = 1; (uid / tens) > 9 ; tens *= 10)
len++;
#endif
cachename = malloc(len);
if (!cachename) {
retval = ENOMEM;
goto cleanup;
}
strcpy(cachename, "rc_");
p = 3;
for (i = 0; i < piece->length; i++) {
if (piece->data[i] == '\\') {
cachename[p++] = '\\';
cachename[p++] = '\\';
continue;
}
if (!isgraph(piece->data[i])) {
sprintf(tmp, "%03o", piece->data[i]);
cachename[p++] = '\\';
cachename[p++] = tmp[0];
cachename[p++] = tmp[1];
cachename[p++] = tmp[2];
continue;
}
cachename[p++] = piece->data[i];
}
#ifdef HAVE_GETEUID
cachename[p++] = '_';
while (tens) {
cachename[p++] = '0' + ((uid / tens) % 10);
tens /= 10;
}
#endif
cachename[p++] = '\0';
if ((retval = krb5_rc_resolve(context, rcache, cachename)))
goto cleanup;
/*
* First try to recover the replay cache; if that doesn't work,
* initialize it.
*/
if (krb5_rc_recover(context, rcache)) {
if ((retval = krb5_rc_initialize(context, rcache,
context->clockskew))) {
krb5_rc_close(context, rcache);
rcache = 0;
goto cleanup;
}
}
*rcptr = rcache;
rcache = 0;
retval = 0;
cleanup:
if (rcache)
krb5_xfree(rcache);
if (cachename)
krb5_xfree(cachename);
return retval;
}
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