/usr/include/nspr/prrng.h is in libnspr4-dev 4.12-0ubuntu0.12.04.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 | /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
** prrng.h -- NSPR Random Number Generator
**
**
** lth. 29-Oct-1999.
*/
#ifndef prrng_h___
#define prrng_h___
#include "prtypes.h"
PR_BEGIN_EXTERN_C
/*
** PR_GetRandomNoise() -- Get random noise from the host platform
**
** Description:
** PR_GetRandomNoise() provides, depending on platform, a random value.
** The length of the random value is dependent on platform and the
** platform's ability to provide a random value at that moment.
**
** The intent of PR_GetRandomNoise() is to provide a "seed" value for a
** another random number generator that may be suitable for
** cryptographic operations. This implies that the random value
** provided may not be, by itself, cryptographically secure. The value
** generated by PR_GetRandomNoise() is at best, extremely difficult to
** predict and is as non-deterministic as the underlying platfrom can
** provide.
**
** Inputs:
** buf -- pointer to a caller supplied buffer to contain the
** generated random number. buf must be at least as large as
** is specified in the 'size' argument.
**
** size -- the requested size of the generated random number
**
** Outputs:
** a random number provided in 'buf'.
**
** Returns:
** PRSize value equal to the size of the random number actually
** generated, or zero. The generated size may be less than the size
** requested. A return value of zero means that PR_GetRandomNoise() is
** not implemented on this platform, or there is no available noise
** available to be returned at the time of the call.
**
** Restrictions:
** Calls to PR_GetRandomNoise() may use a lot of CPU on some platforms.
** Some platforms may block for up to a few seconds while they
** accumulate some noise. Busy machines generate lots of noise, but
** care is advised when using PR_GetRandomNoise() frequently in your
** application.
**
** History:
** Parts of the model dependent implementation for PR_GetRandomNoise()
** were taken in whole or part from code previously in Netscape's NSS
** component.
**
*/
NSPR_API(PRSize) PR_GetRandomNoise(
void *buf,
PRSize size
);
PR_END_EXTERN_C
#endif /* prrng_h___ */
/* end prrng.h */
|