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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. 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"
/*
* 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_PROTOTYPE((krb5_context, krb5_pointer, size_t *));
static krb5_error_code krb5_principal_externalize
KRB5_PROTOTYPE((krb5_context, krb5_pointer, krb5_octet **, size_t *));
static krb5_error_code krb5_principal_internalize
KRB5_PROTOTYPE((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(kcontext, arg, sizep)
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);
krb5_xfree(fname);
}
return(kret);
}
/*
* krb5_principal_externalize() - Externalize the krb5_principal.
*/
static krb5_error_code
krb5_principal_externalize(kcontext, arg, buffer, lenremain)
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;
krb5_xfree(fname);
}
}
}
return(kret);
}
/*
* krb5_principal_internalize() - Internalize the krb5_principal.
*/
static krb5_error_code
krb5_principal_internalize(kcontext, argp, buffer, lenremain)
krb5_context kcontext;
krb5_pointer *argp;
krb5_octet **buffer;
size_t *lenremain;
{
krb5_error_code kret;
krb5_principal principal;
krb5_int32 ibuf;
krb5_octet *bp;
size_t remain;
char *tmpname;
bp = *buffer;
remain = *lenremain;
kret = EINVAL;
/* Read our magic number */
if (krb5_ser_unpack_int32(&ibuf, &bp, &remain))
ibuf = 0;
if (ibuf == KV5M_PRINCIPAL) {
kret = ENOMEM;
/* See if we have enough data for the length */
if (!(kret = krb5_ser_unpack_int32(&ibuf, &bp, &remain))) {
/* Get the string */
if ((tmpname = (char *) malloc((size_t) (ibuf+1))) &&
!(kret = krb5_ser_unpack_bytes((krb5_octet *) tmpname,
(size_t) ibuf,
&bp, &remain))) {
tmpname[ibuf] = '\0';
/* Parse the name to a principal structure */
principal = (krb5_principal) NULL;
kret = krb5_parse_name(kcontext, tmpname, &principal);
if (!kret) {
kret = krb5_ser_unpack_int32(&ibuf, &bp, &remain);
if (!kret && (ibuf == KV5M_PRINCIPAL)) {
*buffer = bp;
*lenremain = remain;
*argp = principal;
}
else
kret = EINVAL;
}
if (kret && principal)
krb5_free_principal(kcontext, principal);
free(tmpname);
}
}
}
return(kret);
}
/*
* Register the context serializer.
*/
krb5_error_code
krb5_ser_principal_init(kcontext)
krb5_context kcontext;
{
return(krb5_register_serializer(kcontext, &krb5_principal_ser_entry));
}
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