xref: /onnv-gate/usr/src/lib/gss_mechs/mech_krb5/crypto/keylengths.c (revision 7934:6aeeafc994de)

/*
 * COPYRIGHT (c) 2006
 * The Regents of the University of Michigan
 * ALL RIGHTS RESERVED
 *
 * Permission is granted to use, copy, create derivative works
 * and redistribute this software and such derivative works
 * for any purpose, so long as the name of The University of
 * Michigan is not used in any advertising or publicity
 * pertaining to the use of distribution of this software
 * without specific, written prior authorization.  If the
 * above copyright notice or any other identification of the
 * University of Michigan is included in any copy of any
 * portion of this software, then the disclaimer below must
 * also be included.
 *
 * THIS SOFTWARE IS PROVIDED AS IS, WITHOUT REPRESENTATION
 * FROM THE UNIVERSITY OF MICHIGAN AS TO ITS FITNESS FOR ANY
 * PURPOSE, AND WITHOUT WARRANTY BY THE UNIVERSITY OF
 * MICHIGAN OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING
 * WITHOUT LIMITATION THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
 * REGENTS OF THE UNIVERSITY OF MICHIGAN SHALL NOT BE LIABLE
 * FOR ANY DAMAGES, INCLUDING SPECIAL, INDIRECT, INCIDENTAL, OR
 * CONSEQUENTIAL DAMAGES, WITH RESPECT TO ANY CLAIM ARISING
 * OUT OF OR IN CONNECTION WITH THE USE OF THE SOFTWARE, EVEN
 * IF IT HAS BEEN OR IS HEREAFTER ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGES.
 */


#include "k5-int.h"
#include "etypes.h"

/*
 * keybytes is the number of bytes required as input to make a key,
 * keylength is the length of the final key in bytes
 */
krb5_error_code KRB5_CALLCONV
krb5_c_keylengths(krb5_context context, krb5_enctype enctype,
		  size_t *keybytes, size_t *keylength)
{
    int i;

    if (keybytes == NULL && keylength == NULL)
	return(EINVAL);

    for (i=0; i<krb5_enctypes_length; i++) {
	if (krb5_enctypes_list[i].etype == enctype)
	    break;
    }

    if (i == krb5_enctypes_length)
	return(KRB5_BAD_ENCTYPE);

    if (keybytes)
	*keybytes = krb5_enctypes_list[i].enc->keybytes;
    if (keylength)
	*keylength = krb5_enctypes_list[i].enc->keylength;

    return(0);
}