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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Netscape security libraries.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1994-2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef _SECRNG_H_
#define _SECRNG_H_
/*
* secrng.h - public data structures and prototypes for the secure random
* number generator
*
* $Id: secrng.h,v 1.5.28.1 2006/10/12 02:18:38 wtchang%redhat.com Exp $
*/
/******************************************/
/*
** Random number generation. A cryptographically strong random number
** generator.
*/
#include "blapi.h"
/* the number of bytes to read from the system random number generator */
#define SYSTEM_RNG_SEED_COUNT 1024
SEC_BEGIN_PROTOS
/*
** The following functions are provided by the security library
** but are differently implemented for the UNIX, Win, and OS/2
** versions
*/
/*
** Get the "noisiest" information available on the system.
** The amount of data returned depends on the system implementation.
** It will not exceed maxbytes, but may be (much) less.
** Returns number of noise bytes copied into buf, or zero if error.
*/
extern size_t RNG_GetNoise(void *buf, size_t maxbytes);
/*
** RNG_SystemInfoForRNG should be called before any use of SSL. It
** gathers up the system specific information to help seed the
** state of the global random number generator.
*/
extern void RNG_SystemInfoForRNG(void);
/*
** Use the contents (and stat) of a file to help seed the
** global random number generator.
*/
extern void RNG_FileForRNG(const char *filename);
/*
** Get maxbytes bytes of random data from the system random number
** generator.
** Returns the number of bytes copied into buf -- maxbytes if success
** or zero if error.
** Errors:
** PR_NOT_IMPLEMENTED_ERROR There is no system RNG on the platform.
** SEC_ERROR_NEED_RANDOM The system RNG failed.
*/
extern size_t RNG_SystemRNG(void *buf, size_t maxbytes);
SEC_END_PROTOS
#endif /* _SECRNG_H_ */
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