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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* lib/crypto/krb/enctype_util.c
*
* Copyright (C) 1998 by the FundsXpress, INC.
*
* 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 FundsXpress. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. FundsXpress makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
*
* krb5int_c_valid_enctype()
* krb5int_c_weak_enctype()
* krb5_c_enctype_compare()
* krb5_string_to_enctype()
* krb5_enctype_to_string()
*/
#include "k5-int.h"
#include "etypes.h"
krb5_boolean KRB5_CALLCONV
krb5_c_valid_enctype(krb5_enctype etype)
{
return (find_enctype(etype) != NULL);
}
krb5_boolean KRB5_CALLCONV
krb5int_c_weak_enctype(krb5_enctype etype)
{
const struct krb5_keytypes *ktp;
ktp = find_enctype(etype);
return (ktp != NULL && (ktp->flags & ETYPE_WEAK) != 0);
}
krb5_error_code KRB5_CALLCONV
krb5_c_enctype_compare(krb5_context context, krb5_enctype e1, krb5_enctype e2,
krb5_boolean *similar)
{
const struct krb5_keytypes *ktp1, *ktp2;
ktp1 = find_enctype(e1);
ktp2 = find_enctype(e2);
if (ktp1 == NULL || ktp2 == NULL)
return KRB5_BAD_ENCTYPE;
*similar = (ktp1->enc == ktp2->enc && ktp1->str2key == ktp2->str2key);
return 0;
}
krb5_error_code KRB5_CALLCONV
krb5_string_to_enctype(char *string, krb5_enctype *enctypep)
{
int i;
unsigned int j;
const char *alias;
const struct krb5_keytypes *ktp;
for (i = 0; i < krb5int_enctypes_length; i++) {
ktp = &krb5int_enctypes_list[i];
if (strcasecmp(ktp->name, string) == 0) {
*enctypep = ktp->etype;
return 0;
}
for (j = 0; j < MAX_ETYPE_ALIASES; j++) {
alias = ktp->aliases[j];
if (alias == NULL)
break;
if (strcasecmp(alias, string) == 0) {
*enctypep = ktp->etype;
return 0;
}
}
}
return EINVAL;
}
krb5_error_code KRB5_CALLCONV
krb5_enctype_to_string(krb5_enctype enctype, char *buffer, size_t buflen)
{
const struct krb5_keytypes *ktp;
ktp = find_enctype(enctype);
if (ktp == NULL)
return EINVAL;
if (strlcpy(buffer, ktp->out_string, buflen) >= buflen)
return ENOMEM;
return 0;
}
krb5_error_code KRB5_CALLCONV
krb5_enctype_to_name(krb5_enctype enctype, krb5_boolean shortest,
char *buffer, size_t buflen)
{
const struct krb5_keytypes *ktp;
const char *name;
int i;
ktp = find_enctype(enctype);
if (ktp == NULL)
return EINVAL;
name = ktp->name;
if (shortest) {
for (i = 0; i < MAX_ETYPE_ALIASES; i++) {
if (ktp->aliases[i] == NULL)
break;
if (strlen(ktp->aliases[i]) < strlen(name))
name = ktp->aliases[i];
}
}
if (strlcpy(buffer, name, buflen) >= buflen)
return ENOMEM;
return 0;
}
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