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/*
* lib/krb5/krb/unparse.c
*
* Copyright 1990 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.
*
*
* krb5_unparse_name() routine
*
* Rewritten by Theodore Ts'o to propoerly unparse principal names
* which have the component or realm separator as part of one of their
* components.
*/
#include "k5-int.h"
#include <stdio.h>
/*
* converts the multi-part principal format used in the protocols to a
* single-string representation of the name.
*
* The name returned is in allocated storage and should be freed by
* the caller when finished.
*
* Conventions: / is used to separate components; @ is used to
* separate the realm from the rest of the name. If '/', '@', or '\0'
* appear in any the component, they will be representing using
* backslash encoding. ("\/", "\@", or '\0', respectively)
*
* returns error
* KRB_PARSE_MALFORMED principal is invalid (does not contain
* at least 2 components)
* also returns system errors
* ENOMEM unable to allocate memory for string
*/
#define REALM_SEP '@'
#define COMPONENT_SEP '/'
krb5_error_code KRB5_CALLCONV
krb5_unparse_name_ext(krb5_context context, krb5_const_principal principal, register char **name, unsigned int *size)
{
register char *cp, *q;
register int i,j;
int length;
krb5_int32 nelem;
register unsigned int totalsize = 0;
if (!principal)
return KRB5_PARSE_MALFORMED;
cp = krb5_princ_realm(context, principal)->data;
length = krb5_princ_realm(context, principal)->length;
totalsize += length;
for (j = 0; j < length; j++,cp++)
if (*cp == REALM_SEP || *cp == COMPONENT_SEP ||
*cp == '\0' || *cp == '\\' || *cp == '\t' ||
*cp == '\n' || *cp == '\b')
totalsize++;
totalsize++; /* This is for the separator */
nelem = krb5_princ_size(context, principal);
for (i = 0; i < (int) nelem; i++) {
cp = krb5_princ_component(context, principal, i)->data;
length = krb5_princ_component(context, principal, i)->length;
totalsize += length;
for (j=0; j < length; j++,cp++)
if (*cp == REALM_SEP || *cp == COMPONENT_SEP ||
*cp == '\0' || *cp == '\\' || *cp == '\t' ||
*cp == '\n' || *cp == '\b')
totalsize++;
totalsize++; /* This is for the separator */
}
/*
* Allocate space for the ascii string; if space has been
* provided, use it, realloc'ing it if necessary.
*
* We need only n-1 seperators for n components, but we need
* an extra byte for the NULL at the end.
*/
if (*name) {
if (*size < (totalsize)) {
*size = totalsize;
*name = realloc(*name, totalsize);
}
} else {
*name = malloc(totalsize);
if (size)
*size = totalsize;
}
if (!*name)
return ENOMEM;
q = *name;
for (i = 0; i < (int) nelem; i++) {
cp = krb5_princ_component(context, principal, i)->data;
length = krb5_princ_component(context, principal, i)->length;
for (j=0; j < length; j++,cp++) {
switch (*cp) {
case COMPONENT_SEP:
case REALM_SEP:
case '\\':
*q++ = '\\';
*q++ = *cp;
break;
case '\t':
*q++ = '\\';
*q++ = 't';
break;
case '\n':
*q++ = '\\';
*q++ = 'n';
break;
case '\b':
*q++ = '\\';
*q++ = 'b';
break;
case '\0':
*q++ = '\\';
*q++ = '0';
break;
default:
*q++ = *cp;
}
}
*q++ = COMPONENT_SEP;
}
q--; /* Back up last component separator */
*q++ = REALM_SEP;
cp = krb5_princ_realm(context, principal)->data;
length = krb5_princ_realm(context, principal)->length;
for (j=0; j < length; j++,cp++) {
switch (*cp) {
case COMPONENT_SEP:
case REALM_SEP:
case '\\':
*q++ = '\\';
*q++ = *cp;
break;
case '\t':
*q++ = '\\';
*q++ = 't';
break;
case '\n':
*q++ = '\\';
*q++ = 'n';
break;
case '\b':
*q++ = '\\';
*q++ = 'b';
break;
case '\0':
*q++ = '\\';
*q++ = '0';
break;
default:
*q++ = *cp;
}
}
*q++ = '\0';
return 0;
}
krb5_error_code KRB5_CALLCONV
krb5_unparse_name(krb5_context context, krb5_const_principal principal, register char **name)
{
*name = NULL;
return(krb5_unparse_name_ext(context, principal, name, NULL));
}
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