Willie Solano / mbedtls-slave-prot-prod

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Dependents:   Slave-prot-prod

include/mbedtls/entropy_poll.h@1:1a219dea6cb5, 2019-06-04 (annotated)

Committer:
williequesada
Date:
Tue Jun 04 16:03:38 2019 +0000
Revision:
1:1a219dea6cb5
Parent:
0:cdf462088d13 
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markrad 0:cdf462088d13 1 /**
markrad 0:cdf462088d13 2 * \file entropy_poll.h
markrad 0:cdf462088d13 3 *
markrad 0:cdf462088d13 4 * \brief Platform-specific and custom entropy polling functions
markrad 0:cdf462088d13 5 *
markrad 0:cdf462088d13 6 * Copyright (C) 2006-2016, ARM Limited, All Rights Reserved
markrad 0:cdf462088d13 7 * SPDX-License-Identifier: Apache-2.0
markrad 0:cdf462088d13 8 *
markrad 0:cdf462088d13 9 * Licensed under the Apache License, Version 2.0 (the "License"); you may
markrad 0:cdf462088d13 10 * not use this file except in compliance with the License.
markrad 0:cdf462088d13 11 * You may obtain a copy of the License at
markrad 0:cdf462088d13 12 *
markrad 0:cdf462088d13 13 * http://www.apache.org/licenses/LICENSE-2.0
markrad 0:cdf462088d13 14 *
markrad 0:cdf462088d13 15 * Unless required by applicable law or agreed to in writing, software
markrad 0:cdf462088d13 16 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
markrad 0:cdf462088d13 17 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
markrad 0:cdf462088d13 18 * See the License for the specific language governing permissions and
markrad 0:cdf462088d13 19 * limitations under the License.
markrad 0:cdf462088d13 20 *
markrad 0:cdf462088d13 21 * This file is part of mbed TLS (https://tls.mbed.org)
markrad 0:cdf462088d13 22 */
markrad 0:cdf462088d13 23 #ifndef MBEDTLS_ENTROPY_POLL_H
markrad 0:cdf462088d13 24 #define MBEDTLS_ENTROPY_POLL_H
markrad 0:cdf462088d13 25
markrad 0:cdf462088d13 26 #if !defined(MBEDTLS_CONFIG_FILE)
markrad 0:cdf462088d13 27 #include "config.h"
markrad 0:cdf462088d13 28 #else
markrad 0:cdf462088d13 29 #include MBEDTLS_CONFIG_FILE
markrad 0:cdf462088d13 30 #endif
markrad 0:cdf462088d13 31
markrad 0:cdf462088d13 32 #include <stddef.h>
markrad 0:cdf462088d13 33
markrad 0:cdf462088d13 34 #ifdef __cplusplus
markrad 0:cdf462088d13 35 extern "C" {
markrad 0:cdf462088d13 36 #endif
markrad 0:cdf462088d13 37
markrad 0:cdf462088d13 38 /*
markrad 0:cdf462088d13 39 * Default thresholds for built-in sources, in bytes
markrad 0:cdf462088d13 40 */
markrad 0:cdf462088d13 41 #define MBEDTLS_ENTROPY_MIN_PLATFORM 32 /**< Minimum for platform source */
markrad 0:cdf462088d13 42 #define MBEDTLS_ENTROPY_MIN_HAVEGE 32 /**< Minimum for HAVEGE */
markrad 0:cdf462088d13 43 #define MBEDTLS_ENTROPY_MIN_HARDCLOCK 4 /**< Minimum for mbedtls_timing_hardclock() */
markrad 0:cdf462088d13 44 #if !defined(MBEDTLS_ENTROPY_MIN_HARDWARE)
markrad 0:cdf462088d13 45 #define MBEDTLS_ENTROPY_MIN_HARDWARE 32 /**< Minimum for the hardware source */
markrad 0:cdf462088d13 46 #endif
markrad 0:cdf462088d13 47
markrad 0:cdf462088d13 48 /**
markrad 0:cdf462088d13 49 * \brief Entropy poll callback that provides 0 entropy.
markrad 0:cdf462088d13 50 */
markrad 0:cdf462088d13 51 #if defined(MBEDTLS_TEST_NULL_ENTROPY)
markrad 0:cdf462088d13 52 int mbedtls_null_entropy_poll( void *data,
markrad 0:cdf462088d13 53 unsigned char *output, size_t len, size_t *olen );
markrad 0:cdf462088d13 54 #endif
markrad 0:cdf462088d13 55
markrad 0:cdf462088d13 56 #if !defined(MBEDTLS_NO_PLATFORM_ENTROPY)
markrad 0:cdf462088d13 57 /**
markrad 0:cdf462088d13 58 * \brief Platform-specific entropy poll callback
markrad 0:cdf462088d13 59 */
markrad 0:cdf462088d13 60 int mbedtls_platform_entropy_poll( void *data,
markrad 0:cdf462088d13 61 unsigned char *output, size_t len, size_t *olen );
markrad 0:cdf462088d13 62 #endif
markrad 0:cdf462088d13 63
markrad 0:cdf462088d13 64 #if defined(MBEDTLS_HAVEGE_C)
markrad 0:cdf462088d13 65 /**
markrad 0:cdf462088d13 66 * \brief HAVEGE based entropy poll callback
markrad 0:cdf462088d13 67 *
markrad 0:cdf462088d13 68 * Requires an HAVEGE state as its data pointer.
markrad 0:cdf462088d13 69 */
markrad 0:cdf462088d13 70 int mbedtls_havege_poll( void *data,
markrad 0:cdf462088d13 71 unsigned char *output, size_t len, size_t *olen );
markrad 0:cdf462088d13 72 #endif
markrad 0:cdf462088d13 73
markrad 0:cdf462088d13 74 #if defined(MBEDTLS_TIMING_C)
markrad 0:cdf462088d13 75 /**
markrad 0:cdf462088d13 76 * \brief mbedtls_timing_hardclock-based entropy poll callback
markrad 0:cdf462088d13 77 */
markrad 0:cdf462088d13 78 int mbedtls_hardclock_poll( void *data,
markrad 0:cdf462088d13 79 unsigned char *output, size_t len, size_t *olen );
markrad 0:cdf462088d13 80 #endif
markrad 0:cdf462088d13 81
markrad 0:cdf462088d13 82 #if defined(MBEDTLS_ENTROPY_HARDWARE_ALT)
markrad 0:cdf462088d13 83 /**
markrad 0:cdf462088d13 84 * \brief Entropy poll callback for a hardware source
markrad 0:cdf462088d13 85 *
markrad 0:cdf462088d13 86 * \warning This is not provided by mbed TLS!
markrad 0:cdf462088d13 87 * See \c MBEDTLS_ENTROPY_HARDWARE_ALT in config.h.
markrad 0:cdf462088d13 88 *
markrad 0:cdf462088d13 89 * \note This must accept NULL as its first argument.
markrad 0:cdf462088d13 90 */
markrad 0:cdf462088d13 91 int mbedtls_hardware_poll( void *data,
markrad 0:cdf462088d13 92 unsigned char *output, size_t len, size_t *olen );
markrad 0:cdf462088d13 93 #endif
markrad 0:cdf462088d13 94
markrad 0:cdf462088d13 95 #if defined(MBEDTLS_ENTROPY_NV_SEED)
markrad 0:cdf462088d13 96 /**
markrad 0:cdf462088d13 97 * \brief Entropy poll callback for a non-volatile seed file
markrad 0:cdf462088d13 98 *
markrad 0:cdf462088d13 99 * \note This must accept NULL as its first argument.
markrad 0:cdf462088d13 100 */
markrad 0:cdf462088d13 101 int mbedtls_nv_seed_poll( void *data,
markrad 0:cdf462088d13 102 unsigned char *output, size_t len, size_t *olen );
markrad 0:cdf462088d13 103 #endif
markrad 0:cdf462088d13 104
markrad 0:cdf462088d13 105 #ifdef __cplusplus
markrad 0:cdf462088d13 106 }
markrad 0:cdf462088d13 107 #endif
markrad 0:cdf462088d13 108
markrad 0:cdf462088d13 109 #endif /* entropy_poll.h */