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Diffstat (limited to 'polarssl/src/include/polarssl/entropy_poll.h')
-rw-r--r-- | polarssl/src/include/polarssl/entropy_poll.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/polarssl/src/include/polarssl/entropy_poll.h b/polarssl/src/include/polarssl/entropy_poll.h new file mode 100644 index 0000000..0116598 --- /dev/null +++ b/polarssl/src/include/polarssl/entropy_poll.h @@ -0,0 +1,75 @@ +/** + * \file entropy_poll.h + * + * \brief Platform-specific and custom entropy polling functions + * + * Copyright (C) 2006-2011, Brainspark B.V. + * + * This file is part of PolarSSL (http://www.polarssl.org) + * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org> + * + * All rights reserved. + * + * 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. + * + * 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. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ +#ifndef POLARSSL_ENTROPY_POLL_H +#define POLARSSL_ENTROPY_POLL_H + +#include <string.h> + +#include "config.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * Default thresholds for built-in sources + */ +#define ENTROPY_MIN_PLATFORM 128 /**< Minimum for platform source */ +#define ENTROPY_MIN_HAVEGE 128 /**< Minimum for HAVEGE */ +#define ENTROPY_MIN_HARDCLOCK 32 /**< Minimum for hardclock() */ + +#if !defined(POLARSSL_NO_PLATFORM_ENTROPY) +/** + * \brief Platform-specific entropy poll callback + */ +int platform_entropy_poll( void *data, + unsigned char *output, size_t len, size_t *olen ); +#endif + +#if defined(POLARSSL_HAVEGE_C) +/** + * \brief HAVEGE based entropy poll callback + * + * Requires an HAVEGE state as its data pointer. + */ +int havege_poll( void *data, + unsigned char *output, size_t len, size_t *olen ); +#endif + +#if defined(POLARSSL_TIMING_C) +/** + * \brief hardclock-based entropy poll callback + */ +int hardclock_poll( void *data, + unsigned char *output, size_t len, size_t *olen ); +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* entropy_poll.h */ |