text: /*
   * Copyright (C) 2008  Internet Systems Consortium, Inc. ("ISC")
   *
   * Permission to use, copy, modify, and/or distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
   * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
   * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
   * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
   * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
   * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
   * PERFORMANCE OF THIS SOFTWARE.
   */
  
  /* $Id: iterated_hash.h,v 1.3 2008/09/25 04:02:39 tbox Exp $ */
  
  #ifndef ISC_ITERATED_HASH_H
  #define ISC_ITERATED_HASH_H 1
  
  #include <isc/lang.h>
  #include <isc/sha1.h>
  
  /*
   * The maximal hash length that can be encoded it a name
   * using base32hex.  floor(255/8)*5
   */
  #define NSEC3_MAX_HASH_LENGTH 155
  
  /*
   * The maximum has that can be encoded in a single label using
   * base32hex.  floor(63/8)*5
   */
  #define NSEC3_MAX_LABEL_HASH 35
  
  ISC_LANG_BEGINDECLS
  
  int isc_iterated_hash(unsigned char out[NSEC3_MAX_HASH_LENGTH],
  		      unsigned int hashalg, int iterations,
  		      const unsigned char *salt, int saltlength,
  		      const unsigned char *in, int inlength);
  
  
  ISC_LANG_ENDDECLS
  
  #endif /* ISC_ITERATED_HASH_H */
  