usr/src/lib/gss_mechs/mech_krb5/crypto/state.c

   1 /*
   2  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
   3  * Use is subject to license terms.
   4  */
   5
   6 /*
   7  * lib/crypto/state.c
   8  *
   9  * Copyright (C) 2001 by the Massachusetts Institute of Technology.
  10  * All rights reserved.
  11  *
  12  * Export of this software from the United States of America may
  13  *   require a specific license from the United States Government.
  14  *   It is the responsibility of any person or organization contemplating
  15  *   export to obtain such a license before exporting.
  16  *
  17  * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
  18  * distribute this software and its documentation for any purpose and
  19  * without fee is hereby granted, provided that the above copyright
  20  * notice appear in all copies and that both that copyright notice and
  21  * this permission notice appear in supporting documentation, and that
  22  * the name of M.I.T. not be used in advertising or publicity pertaining
  23  * to distribution of the software without specific, written prior
  24  * permission.  Furthermore if you modify this software you must label
  25  * your software as modified software and not distribute it in such a
  26  * fashion that it might be confused with the original M.I.T. software.
  27  * M.I.T. makes no representations about the suitability of
  28  * this software for any purpose.  It is provided "as is" without express
  29
  30  *
  31  *
  32  *
  33  *  * Section 6 (Encryption) of the Kerberos revisions document defines
  34  * cipher states to be used to chain encryptions and decryptions
  35  * together.  Examples of cipher states include initialization vectors
  36  * for CBC encription.    This file contains implementations of
  37  * krb5_c_init_state and krb5_c_free_state used by clients of the
  38  * Kerberos crypto library.
  39  */
  40 #include "k5-int.h"
  41 #include "etypes.h"
  42
  43 krb5_error_code KRB5_CALLCONV
  44 krb5_c_init_state (krb5_context context, const krb5_keyblock *key,
  45                    krb5_keyusage keyusage, krb5_data *new_state)
  46 {
  47       int i;
  48
  49     for (i=0; i<krb5_enctypes_length; i++) {
  50         if (krb5_enctypes_list[i].etype == key->enctype)
  51             break;
  52     }
  53
  54     if (i == krb5_enctypes_length)
  55         return(KRB5_BAD_ENCTYPE);
  56
  57     /* Solaris Kerberos */
  58     return (*(krb5_enctypes_list[i].enc->init_state))
  59       (context, key, keyusage, new_state);
  60 }
  61
  62 krb5_error_code KRB5_CALLCONV
  63 krb5_c_free_state (krb5_context context, const krb5_keyblock *key,
  64                    krb5_data *state)
  65 {
  66       int i;
  67
  68     for (i=0; i<krb5_enctypes_length; i++) {
  69         if (krb5_enctypes_list[i].etype == key->enctype)
  70             break;
  71     }
  72
  73     if (i == krb5_enctypes_length)
  74         return(KRB5_BAD_ENCTYPE);
  75
  76     /* Solaris Kerberos */
  77     return     (*(krb5_enctypes_list[i].enc->free_state))
  78       (context, state);
  79 }