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/*
* lib/krb5/krb/ser_princ.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. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* 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_princ.c - Serialize a krb5_principal structure.
*/
#include "k5-int.h"
#include "int-proto.h"
/*
* Routines to deal with externalizing the krb5_principal:
* krb5_principal_size();
* krb5_principal_externalize();
* krb5_principal_internalize();
*/
static krb5_error_code krb5_principal_size
(krb5_context, krb5_pointer, size_t *);
static krb5_error_code krb5_principal_externalize
(krb5_context, krb5_pointer, krb5_octet **, size_t *);
static krb5_error_code krb5_principal_internalize
(krb5_context,krb5_pointer *, krb5_octet **, size_t *);
/* Local data */
static const krb5_ser_entry krb5_principal_ser_entry = {
KV5M_PRINCIPAL, /* Type */
krb5_principal_size, /* Sizer routine */
krb5_principal_externalize, /* Externalize routine */
krb5_principal_internalize /* Internalize routine */
};
/*
* krb5_principal_size() - Determine the size required to externalize
* the krb5_principal.
*/
static krb5_error_code
krb5_principal_size(krb5_context kcontext, krb5_pointer arg, size_t *sizep)
{
krb5_error_code kret;
krb5_principal principal;
char *fname;
/*
* krb5_principal requires:
* krb5_int32 for KV5M_PRINCIPAL
* krb5_int32 for flattened name size
* strlen(name) for name.
* krb5_int32 for KV5M_PRINCIPAL
*/
kret = EINVAL;
if ((principal = (krb5_principal) arg) &&
!(kret = krb5_unparse_name(kcontext, principal, &fname))) {
*sizep += (3*sizeof(krb5_int32)) + strlen(fname);
free(fname);
}
return(kret);
}
/*
* krb5_principal_externalize() - Externalize the krb5_principal.
*/
static krb5_error_code
krb5_principal_externalize(krb5_context kcontext, krb5_pointer arg, krb5_octet **buffer, size_t *lenremain)
{
krb5_error_code kret;
krb5_principal principal;
size_t required;
krb5_octet *bp;
size_t remain;
char *fname;
required = 0;
bp = *buffer;
remain = *lenremain;
kret = EINVAL;
if ((principal = (krb5_principal) arg)) {
kret = ENOMEM;
if (!krb5_principal_size(kcontext, arg, &required) &&
(required <= remain)) {
if (!(kret = krb5_unparse_name(kcontext, principal, &fname))) {
(void) krb5_ser_pack_int32(KV5M_PRINCIPAL, &bp, &remain);
(void) krb5_ser_pack_int32((krb5_int32) strlen(fname),
&bp, &remain);
(void) krb5_ser_pack_bytes((krb5_octet *) fname,
strlen(fname), &bp, &remain);
(void) krb5_ser_pack_int32(KV5M_PRINCIPAL, &bp, &remain);
*buffer = bp;
*lenremain = remain;
free(fname);
}
}
}
return(kret);
}
/*
* krb5_principal_internalize() - Internalize the krb5_principal.
*/
static krb5_error_code
krb5_principal_internalize(krb5_context kcontext, krb5_pointer *argp, krb5_octet **buffer, size_t *lenremain)
{
krb5_error_code kret;
krb5_principal principal = NULL;
krb5_int32 ibuf;
krb5_octet *bp;
size_t remain;
char *tmpname = NULL;
*argp = NULL;
bp = *buffer;
remain = *lenremain;
/* Read our magic number */
if (krb5_ser_unpack_int32(&ibuf, &bp, &remain) || ibuf != KV5M_PRINCIPAL)
return EINVAL;
/* Read the principal name */
kret = krb5_ser_unpack_int32(&ibuf, &bp, &remain);
if (kret)
return kret;
tmpname = malloc(ibuf + 1);
kret = krb5_ser_unpack_bytes((krb5_octet *) tmpname, (size_t) ibuf,
&bp, &remain);
if (kret)
goto cleanup;
tmpname[ibuf] = '\0';
/* Parse the name to a principal structure */
kret = krb5_parse_name(kcontext, tmpname, &principal);
if (kret)
goto cleanup;
/* Read the trailing magic number */
if (krb5_ser_unpack_int32(&ibuf, &bp, &remain) || ibuf != KV5M_PRINCIPAL) {
kret = EINVAL;
goto cleanup;
}
*buffer = bp;
*lenremain = remain;
*argp = principal;
cleanup:
if (kret)
krb5_free_principal(kcontext, principal);
free(tmpname);
return kret;
}
/*
* Register the context serializer.
*/
krb5_error_code
krb5_ser_principal_init(krb5_context kcontext)
{
return(krb5_register_serializer(kcontext, &krb5_principal_ser_entry));
}
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