text: /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
  /*
   * 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.
   */
  
  #include "k5-int.h"
  #include "etypes.h"
  
  krb5_error_code KRB5_CALLCONV
  krb5_c_string_to_key_with_params(krb5_context context,
                                   krb5_enctype enctype,
                                   const krb5_data *string,
                                   const krb5_data *salt,
                                   const krb5_data *params,
                                   krb5_keyblock *key);
  
  
  krb5_error_code KRB5_CALLCONV
  krb5_c_string_to_key(krb5_context context, krb5_enctype enctype,
                       const krb5_data *string, const krb5_data *salt,
                       krb5_keyblock *key)
  {
      return krb5_c_string_to_key_with_params(context, enctype, string, salt,
                                              NULL, key);
  }
  
  krb5_error_code KRB5_CALLCONV
  krb5_c_string_to_key_with_params(krb5_context context, krb5_enctype enctype,
                                   const krb5_data *string,
                                   const krb5_data *salt,
                                   const krb5_data *params, krb5_keyblock *key)
  {
      krb5_error_code ret;
      const struct krb5_keytypes *ktp;
      size_t keylength;
  
      ktp = find_enctype(enctype);
      if (ktp == NULL)
          return KRB5_BAD_ENCTYPE;
      keylength = ktp->enc->keylength;
  
      /*
       * xxx AFS string2key function is indicated by a special length  in
       * the salt in much of the code.  However only the DES enctypes can
       * deal with this.  Using s2kparams would be a much better solution.
       */
      if (salt && salt->length == SALT_TYPE_AFS_LENGTH) {
          switch (enctype) {
          case ENCTYPE_DES_CBC_CRC:
          case ENCTYPE_DES_CBC_MD4:
          case ENCTYPE_DES_CBC_MD5:
              break;
          default:
              return KRB5_CRYPTO_INTERNAL;
          }
      }
  
      key->contents = malloc(keylength);
      if (key->contents == NULL)
          return ENOMEM;
  
      key->magic = KV5M_KEYBLOCK;
      key->enctype = enctype;
      key->length = keylength;
  
      ret = (*ktp->str2key)(ktp, string, salt, params, key);
      if (ret) {
          zapfree(key->contents, keylength);
          key->length = 0;
          key->contents = NULL;
      }
  
      return ret;
  }
  