mirror of
https://github.com/cuberite/polarssl.git
synced 2025-11-03 12:11:27 -05:00
e0e9c573ad
Deprecate mbedtls_hmac_drbg_update (which returns void) in favor of a new function mbedtls_hmac_drbg_update_ret which reports error.
329 lines
12 KiB
C
329 lines
12 KiB
C
/**
|
|
* \file hmac_drbg.h
|
|
*
|
|
* \brief HMAC_DRBG (NIST SP 800-90A)
|
|
*/
|
|
/*
|
|
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*
|
|
* This file is part of mbed TLS (https://tls.mbed.org)
|
|
*/
|
|
#ifndef MBEDTLS_HMAC_DRBG_H
|
|
#define MBEDTLS_HMAC_DRBG_H
|
|
|
|
#include "md.h"
|
|
|
|
#if defined(MBEDTLS_THREADING_C)
|
|
#include "threading.h"
|
|
#endif
|
|
|
|
/*
|
|
* Error codes
|
|
*/
|
|
#define MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG -0x0003 /**< Too many random requested in single call. */
|
|
#define MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG -0x0005 /**< Input too large (Entropy + additional). */
|
|
#define MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR -0x0007 /**< Read/write error in file. */
|
|
#define MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED -0x0009 /**< The entropy source failed. */
|
|
|
|
/**
|
|
* \name SECTION: Module settings
|
|
*
|
|
* The configuration options you can set for this module are in this section.
|
|
* Either change them in config.h or define them on the compiler command line.
|
|
* \{
|
|
*/
|
|
|
|
#if !defined(MBEDTLS_HMAC_DRBG_RESEED_INTERVAL)
|
|
#define MBEDTLS_HMAC_DRBG_RESEED_INTERVAL 10000 /**< Interval before reseed is performed by default */
|
|
#endif
|
|
|
|
#if !defined(MBEDTLS_HMAC_DRBG_MAX_INPUT)
|
|
#define MBEDTLS_HMAC_DRBG_MAX_INPUT 256 /**< Maximum number of additional input bytes */
|
|
#endif
|
|
|
|
#if !defined(MBEDTLS_HMAC_DRBG_MAX_REQUEST)
|
|
#define MBEDTLS_HMAC_DRBG_MAX_REQUEST 1024 /**< Maximum number of requested bytes per call */
|
|
#endif
|
|
|
|
#if !defined(MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT)
|
|
#define MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT 384 /**< Maximum size of (re)seed buffer */
|
|
#endif
|
|
|
|
/* \} name SECTION: Module settings */
|
|
|
|
#define MBEDTLS_HMAC_DRBG_PR_OFF 0 /**< No prediction resistance */
|
|
#define MBEDTLS_HMAC_DRBG_PR_ON 1 /**< Prediction resistance enabled */
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/**
|
|
* HMAC_DRBG context.
|
|
*/
|
|
typedef struct mbedtls_hmac_drbg_context
|
|
{
|
|
/* Working state: the key K is not stored explicitely,
|
|
* but is implied by the HMAC context */
|
|
mbedtls_md_context_t md_ctx; /*!< HMAC context (inc. K) */
|
|
unsigned char V[MBEDTLS_MD_MAX_SIZE]; /*!< V in the spec */
|
|
int reseed_counter; /*!< reseed counter */
|
|
|
|
/* Administrative state */
|
|
size_t entropy_len; /*!< entropy bytes grabbed on each (re)seed */
|
|
int prediction_resistance; /*!< enable prediction resistance (Automatic
|
|
reseed before every random generation) */
|
|
int reseed_interval; /*!< reseed interval */
|
|
|
|
/* Callbacks */
|
|
int (*f_entropy)(void *, unsigned char *, size_t); /*!< entropy function */
|
|
void *p_entropy; /*!< context for the entropy function */
|
|
|
|
#if defined(MBEDTLS_THREADING_C)
|
|
mbedtls_threading_mutex_t mutex;
|
|
#endif
|
|
} mbedtls_hmac_drbg_context;
|
|
|
|
/**
|
|
* \brief HMAC_DRBG context initialization
|
|
* Makes the context ready for mbedtls_hmac_drbg_seed(),
|
|
* mbedtls_hmac_drbg_seed_buf() or
|
|
* mbedtls_hmac_drbg_free().
|
|
*
|
|
* \param ctx HMAC_DRBG context to be initialized
|
|
*/
|
|
void mbedtls_hmac_drbg_init( mbedtls_hmac_drbg_context *ctx );
|
|
|
|
/**
|
|
* \brief HMAC_DRBG initial seeding
|
|
* Seed and setup entropy source for future reseeds.
|
|
*
|
|
* \param ctx HMAC_DRBG context to be seeded
|
|
* \param md_info MD algorithm to use for HMAC_DRBG
|
|
* \param f_entropy Entropy callback (p_entropy, buffer to fill, buffer
|
|
* length)
|
|
* \param p_entropy Entropy context
|
|
* \param custom Personalization data (Device specific identifiers)
|
|
* (Can be NULL)
|
|
* \param len Length of personalization data
|
|
*
|
|
* \note The "security strength" as defined by NIST is set to:
|
|
* 128 bits if md_alg is SHA-1,
|
|
* 192 bits if md_alg is SHA-224,
|
|
* 256 bits if md_alg is SHA-256 or higher.
|
|
* Note that SHA-256 is just as efficient as SHA-224.
|
|
*
|
|
* \return 0 if successful, or
|
|
* MBEDTLS_ERR_MD_BAD_INPUT_DATA, or
|
|
* MBEDTLS_ERR_MD_ALLOC_FAILED, or
|
|
* MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED.
|
|
*/
|
|
int mbedtls_hmac_drbg_seed( mbedtls_hmac_drbg_context *ctx,
|
|
const mbedtls_md_info_t * md_info,
|
|
int (*f_entropy)(void *, unsigned char *, size_t),
|
|
void *p_entropy,
|
|
const unsigned char *custom,
|
|
size_t len );
|
|
|
|
/**
|
|
* \brief Initilisation of simpified HMAC_DRBG (never reseeds).
|
|
* (For use with deterministic ECDSA.)
|
|
*
|
|
* \param ctx HMAC_DRBG context to be initialised
|
|
* \param md_info MD algorithm to use for HMAC_DRBG
|
|
* \param data Concatenation of entropy string and additional data
|
|
* \param data_len Length of data in bytes
|
|
*
|
|
* \return 0 if successful, or
|
|
* MBEDTLS_ERR_MD_BAD_INPUT_DATA, or
|
|
* MBEDTLS_ERR_MD_ALLOC_FAILED.
|
|
*/
|
|
int mbedtls_hmac_drbg_seed_buf( mbedtls_hmac_drbg_context *ctx,
|
|
const mbedtls_md_info_t * md_info,
|
|
const unsigned char *data, size_t data_len );
|
|
|
|
/**
|
|
* \brief Enable / disable prediction resistance (Default: Off)
|
|
*
|
|
* Note: If enabled, entropy is used for ctx->entropy_len before each call!
|
|
* Only use this if you have ample supply of good entropy!
|
|
*
|
|
* \param ctx HMAC_DRBG context
|
|
* \param resistance MBEDTLS_HMAC_DRBG_PR_ON or MBEDTLS_HMAC_DRBG_PR_OFF
|
|
*/
|
|
void mbedtls_hmac_drbg_set_prediction_resistance( mbedtls_hmac_drbg_context *ctx,
|
|
int resistance );
|
|
|
|
/**
|
|
* \brief Set the amount of entropy grabbed on each reseed
|
|
* (Default: given by the security strength, which
|
|
* depends on the hash used, see \c mbedtls_hmac_drbg_init() )
|
|
*
|
|
* \param ctx HMAC_DRBG context
|
|
* \param len Amount of entropy to grab, in bytes
|
|
*/
|
|
void mbedtls_hmac_drbg_set_entropy_len( mbedtls_hmac_drbg_context *ctx,
|
|
size_t len );
|
|
|
|
/**
|
|
* \brief Set the reseed interval
|
|
* (Default: MBEDTLS_HMAC_DRBG_RESEED_INTERVAL)
|
|
*
|
|
* \param ctx HMAC_DRBG context
|
|
* \param interval Reseed interval
|
|
*/
|
|
void mbedtls_hmac_drbg_set_reseed_interval( mbedtls_hmac_drbg_context *ctx,
|
|
int interval );
|
|
|
|
/**
|
|
* \brief HMAC_DRBG update state
|
|
*
|
|
* \param ctx HMAC_DRBG context
|
|
* \param additional Additional data to update state with, or NULL
|
|
* \param add_len Length of additional data, or 0
|
|
*
|
|
* \return \c 0 on success, or an error from the underlying
|
|
* hash calculation.
|
|
*
|
|
* \note Additional data is optional, pass NULL and 0 as second
|
|
* third argument if no additional data is being used.
|
|
*/
|
|
int mbedtls_hmac_drbg_update_ret( mbedtls_hmac_drbg_context *ctx,
|
|
const unsigned char *additional, size_t add_len );
|
|
|
|
/**
|
|
* \brief HMAC_DRBG reseeding (extracts data from entropy source)
|
|
*
|
|
* \param ctx HMAC_DRBG context
|
|
* \param additional Additional data to add to state (Can be NULL)
|
|
* \param len Length of additional data
|
|
*
|
|
* \return 0 if successful, or
|
|
* MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED
|
|
*/
|
|
int mbedtls_hmac_drbg_reseed( mbedtls_hmac_drbg_context *ctx,
|
|
const unsigned char *additional, size_t len );
|
|
|
|
/**
|
|
* \brief HMAC_DRBG generate random with additional update input
|
|
*
|
|
* Note: Automatically reseeds if reseed_counter is reached or PR is enabled.
|
|
*
|
|
* \param p_rng HMAC_DRBG context
|
|
* \param output Buffer to fill
|
|
* \param output_len Length of the buffer
|
|
* \param additional Additional data to update with (can be NULL)
|
|
* \param add_len Length of additional data (can be 0)
|
|
*
|
|
* \return 0 if successful, or
|
|
* MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED, or
|
|
* MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG, or
|
|
* MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG.
|
|
*/
|
|
int mbedtls_hmac_drbg_random_with_add( void *p_rng,
|
|
unsigned char *output, size_t output_len,
|
|
const unsigned char *additional,
|
|
size_t add_len );
|
|
|
|
/**
|
|
* \brief HMAC_DRBG generate random
|
|
*
|
|
* Note: Automatically reseeds if reseed_counter is reached or PR is enabled.
|
|
*
|
|
* \param p_rng HMAC_DRBG context
|
|
* \param output Buffer to fill
|
|
* \param out_len Length of the buffer
|
|
*
|
|
* \return 0 if successful, or
|
|
* MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED, or
|
|
* MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG
|
|
*/
|
|
int mbedtls_hmac_drbg_random( void *p_rng, unsigned char *output, size_t out_len );
|
|
|
|
/**
|
|
* \brief Free an HMAC_DRBG context
|
|
*
|
|
* \param ctx HMAC_DRBG context to free.
|
|
*/
|
|
void mbedtls_hmac_drbg_free( mbedtls_hmac_drbg_context *ctx );
|
|
|
|
#if ! defined(MBEDTLS_DEPRECATED_REMOVED)
|
|
#if defined(MBEDTLS_DEPRECATED_WARNING)
|
|
#define MBEDTLS_DEPRECATED __attribute__((deprecated))
|
|
#else
|
|
#define MBEDTLS_DEPRECATED
|
|
#endif
|
|
/**
|
|
* \brief HMAC_DRBG update state
|
|
*
|
|
* \deprecated Superseded by mbedtls_hmac_drbg_update_ret()
|
|
* in 2.16.0.
|
|
*
|
|
* \param ctx HMAC_DRBG context
|
|
* \param additional Additional data to update state with, or NULL
|
|
* \param add_len Length of additional data, or 0
|
|
*
|
|
* \note Additional data is optional, pass NULL and 0 as second
|
|
* third argument if no additional data is being used.
|
|
*/
|
|
MBEDTLS_DEPRECATED void mbedtls_hmac_drbg_update(
|
|
mbedtls_hmac_drbg_context *ctx,
|
|
const unsigned char *additional, size_t add_len );
|
|
#undef MBEDTLS_DEPRECATED
|
|
#endif /* !MBEDTLS_DEPRECATED_REMOVED */
|
|
|
|
#if defined(MBEDTLS_FS_IO)
|
|
/**
|
|
* \brief Write a seed file
|
|
*
|
|
* \param ctx HMAC_DRBG context
|
|
* \param path Name of the file
|
|
*
|
|
* \return 0 if successful, 1 on file error, or
|
|
* MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED
|
|
*/
|
|
int mbedtls_hmac_drbg_write_seed_file( mbedtls_hmac_drbg_context *ctx, const char *path );
|
|
|
|
/**
|
|
* \brief Read and update a seed file. Seed is added to this
|
|
* instance
|
|
*
|
|
* \param ctx HMAC_DRBG context
|
|
* \param path Name of the file
|
|
*
|
|
* \return 0 if successful, 1 on file error,
|
|
* MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED or
|
|
* MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG
|
|
*/
|
|
int mbedtls_hmac_drbg_update_seed_file( mbedtls_hmac_drbg_context *ctx, const char *path );
|
|
#endif /* MBEDTLS_FS_IO */
|
|
|
|
|
|
#if defined(MBEDTLS_SELF_TEST)
|
|
/**
|
|
* \brief Checkup routine
|
|
*
|
|
* \return 0 if successful, or 1 if the test failed
|
|
*/
|
|
int mbedtls_hmac_drbg_self_test( int verbose );
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* hmac_drbg.h */
|