64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
/*
|
|
* Copyright (C) 2012 Tobias Brunner
|
|
* Copyright (C) 2008 Martin Willi
|
|
* HSR Hochschule fuer Technik Rapperswil
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* for more details.
|
|
*/
|
|
|
|
#include "rng.h"
|
|
|
|
ENUM(rng_quality_names, RNG_WEAK, RNG_TRUE,
|
|
"RNG_WEAK",
|
|
"RNG_STRONG",
|
|
"RNG_TRUE",
|
|
);
|
|
|
|
/*
|
|
* Described in header.
|
|
*/
|
|
bool rng_get_bytes_not_zero(rng_t *rng, size_t len, uint8_t *buffer, bool all)
|
|
{
|
|
uint8_t *pos = buffer, *check = buffer + (all ? len : min(1, len));
|
|
|
|
if (!rng->get_bytes(rng, len, pos))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
for (; pos < check; pos++)
|
|
{
|
|
while (*pos == 0)
|
|
{
|
|
if (!rng->get_bytes(rng, 1, pos))
|
|
{
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* Described in header.
|
|
*/
|
|
bool rng_allocate_bytes_not_zero(rng_t *rng, size_t len, chunk_t *chunk,
|
|
bool all)
|
|
{
|
|
*chunk = chunk_alloc(len);
|
|
if (!rng_get_bytes_not_zero(rng, len, chunk->ptr, all))
|
|
{
|
|
chunk_clear(chunk);
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|