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/*
* lib/krb5/ccache/ser_rc.c
*
* Copyright 1995 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.
*
*/
/*
* ser_rcdfl.c - Serialize replay cache context.
*/
#include "k5-int.h"
/*
* Routines to deal with externalizing krb5_ccache.
* krb5_ccache_size();
* krb5_ccache_externalize();
* krb5_ccache_internalize();
*/
static krb5_error_code krb5_ccache_size
KRB5_PROTOTYPE((krb5_context, krb5_pointer, size_t *));
static krb5_error_code krb5_ccache_externalize
KRB5_PROTOTYPE((krb5_context, krb5_pointer, krb5_octet **, size_t *));
static krb5_error_code krb5_ccache_internalize
KRB5_PROTOTYPE((krb5_context,krb5_pointer *, krb5_octet **, size_t *));
/*
* Serialization entry for this type.
*/
static const krb5_ser_entry krb5_ccache_ser_entry = {
KV5M_CCACHE, /* Type */
krb5_ccache_size, /* Sizer routine */
krb5_ccache_externalize, /* Externalize routine */
krb5_ccache_internalize /* Internalize routine */
};
/*
* krb5_ccache_size() - Determine the size required to externalize
* this krb5_ccache variant.
*/
static krb5_error_code
krb5_ccache_size(kcontext, arg, sizep)
krb5_context kcontext;
krb5_pointer arg;
size_t *sizep;
{
krb5_error_code kret;
krb5_ccache ccache;
size_t required;
kret = EINVAL;
if ((ccache = (krb5_ccache) arg)) {
/*
* Saving FILE: variants of krb5_ccache requires at minimum:
* krb5_int32 for KV5M_CCACHE
* krb5_int32 for length of ccache name.
* krb5_int32 for KV5M_CCACHE
*/
required = sizeof(krb5_int32) * 3;
if (ccache->ops && ccache->ops->prefix)
required += (strlen(ccache->ops->prefix)+1);
/*
* The ccache name is formed as follows:
* <prefix>:<name>
*/
required += strlen(krb5_rc_get_name(kcontext, ccache));
kret = 0;
*sizep += required;
}
return(kret);
}
/*
* krb5_ccache_externalize() - Externalize the krb5_ccache.
*/
static krb5_error_code
krb5_ccache_externalize(kcontext, arg, buffer, lenremain)
krb5_context kcontext;
krb5_pointer arg;
krb5_octet **buffer;
size_t *lenremain;
{
krb5_error_code kret;
krb5_ccache ccache;
size_t required;
krb5_octet *bp;
size_t remain;
char *ccname;
size_t namelen;
char *fnamep;
required = 0;
bp = *buffer;
remain = *lenremain;
kret = EINVAL;
if ((ccache = (krb5_ccache) arg)) {
kret = ENOMEM;
if (!krb5_ccache_size(kcontext, arg, &required) &&
(required <= remain)) {
/* Our identifier */
(void) krb5_ser_pack_int32(KV5M_CCACHE, &bp, &remain);
/* Calculate the length of the name */
namelen = (ccache->ops && ccache->ops->prefix) ?
strlen(ccache->ops->prefix)+1 : 0;
fnamep = krb5_rc_get_name(kcontext, ccache);
namelen += (strlen(fnamep)+1);
if ((ccname = (char *) malloc(namelen))) {
/* Format the ccache name. */
if (ccache->ops && ccache->ops->prefix)
sprintf(ccname, "%s:%s", ccache->ops->prefix, fnamep);
else
strcpy(ccname, fnamep);
/* Put the length of the file name */
(void) krb5_ser_pack_int32((krb5_int32) strlen(ccname),
&bp, &remain);
/* Put the name */
(void) krb5_ser_pack_bytes((krb5_octet *) ccname,
strlen(ccname),
&bp, &remain);
/* Put the trailer */
(void) krb5_ser_pack_int32(KV5M_CCACHE, &bp, &remain);
kret = 0;
*buffer = bp;
*lenremain = remain;
free(ccname);
}
}
}
return(kret);
}
/*
* krb5_ccache_internalize() - Internalize the krb5_ccache.
*/
static krb5_error_code
krb5_ccache_internalize(kcontext, argp, buffer, lenremain)
krb5_context kcontext;
krb5_pointer *argp;
krb5_octet **buffer;
size_t *lenremain;
{
krb5_error_code kret;
krb5_ccache ccache;
krb5_int32 ibuf;
krb5_octet *bp;
size_t remain;
char *ccname;
bp = *buffer;
remain = *lenremain;
kret = EINVAL;
/* Read our magic number */
if (krb5_ser_unpack_int32(&ibuf, &bp, &remain))
ibuf = 0;
if (ibuf == KV5M_CCACHE) {
kret = ENOMEM;
/* Get the length of the ccache name */
kret = krb5_ser_unpack_int32(&ibuf, &bp, &remain);
if (!kret &&
(ccname = (char *) malloc((size_t) (ibuf+1))) &&
!(kret = krb5_ser_unpack_bytes((krb5_octet *) ccname,
(size_t) ibuf,
&bp, &remain))) {
ccname[ibuf] = '\0';
if (!(kret = krb5_cc_resolve(kcontext, ccname, &ccache)) &&
!(kret = krb5_ser_unpack_int32(&ibuf, &bp, &remain)) &&
(ibuf == KV5M_CCACHE)) {
*buffer = bp;
*lenremain = remain;
*argp = (krb5_pointer) ccache;
}
free(ccname);
}
}
return(kret);
}
/*
* Register the ccache serializer.
*/
krb5_error_code
krb5_ser_ccache_init(kcontext)
krb5_context kcontext;
{
return(krb5_register_serializer(kcontext, &krb5_ccache_ser_entry));
}
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