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Diffstat (limited to 'lib/mbedtls-2.27.0/include/mbedtls/hmac_drbg.h')
| -rw-r--r-- | lib/mbedtls-2.27.0/include/mbedtls/hmac_drbg.h | 470 |
1 files changed, 0 insertions, 470 deletions
diff --git a/lib/mbedtls-2.27.0/include/mbedtls/hmac_drbg.h b/lib/mbedtls-2.27.0/include/mbedtls/hmac_drbg.h deleted file mode 100644 index fa33611..0000000 --- a/lib/mbedtls-2.27.0/include/mbedtls/hmac_drbg.h +++ /dev/null @@ -1,470 +0,0 @@ -/** - * \file hmac_drbg.h - * - * \brief The HMAC_DRBG pseudorandom generator. - * - * This module implements the HMAC_DRBG pseudorandom generator described - * in <em>NIST SP 800-90A: Recommendation for Random Number Generation Using - * Deterministic Random Bit Generators</em>. - */ -/* - * Copyright The Mbed TLS Contributors - * 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. - */ -#ifndef MBEDTLS_HMAC_DRBG_H -#define MBEDTLS_HMAC_DRBG_H - -#if !defined(MBEDTLS_CONFIG_FILE) -#include "mbedtls/config.h" -#else -#include MBEDTLS_CONFIG_FILE -#endif - -#include "mbedtls/md.h" - -#if defined(MBEDTLS_THREADING_C) -#include "mbedtls/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 explicitly, - * 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) - /* Invariant: the mutex is initialized if and only if - * md_ctx->md_info != NULL. This means that the mutex is initialized - * during the initial seeding in mbedtls_hmac_drbg_seed() or - * mbedtls_hmac_drbg_seed_buf() and freed in mbedtls_ctr_drbg_free(). - * - * Note that this invariant may change without notice. Do not rely on it - * and do not access the mutex directly in application code. - */ - mbedtls_threading_mutex_t mutex; -#endif -} mbedtls_hmac_drbg_context; - -/** - * \brief HMAC_DRBG context initialization. - * - * This function makes the context ready for mbedtls_hmac_drbg_seed(), - * mbedtls_hmac_drbg_seed_buf() or mbedtls_hmac_drbg_free(). - * - * \note The reseed interval is #MBEDTLS_HMAC_DRBG_RESEED_INTERVAL - * by default. Override this value by calling - * mbedtls_hmac_drbg_set_reseed_interval(). - * - * \param ctx HMAC_DRBG context to be initialized. - */ -void mbedtls_hmac_drbg_init( mbedtls_hmac_drbg_context *ctx ); - -/** - * \brief HMAC_DRBG initial seeding. - * - * Set the initial seed and set up the entropy source for future reseeds. - * - * A typical choice for the \p f_entropy and \p p_entropy parameters is - * to use the entropy module: - * - \p f_entropy is mbedtls_entropy_func(); - * - \p p_entropy is an instance of ::mbedtls_entropy_context initialized - * with mbedtls_entropy_init() (which registers the platform's default - * entropy sources). - * - * You can provide a personalization string in addition to the - * entropy source, to make this instantiation as unique as possible. - * - * \note By default, the security strength as defined by NIST is: - * - 128 bits if \p md_info is SHA-1; - * - 192 bits if \p md_info is SHA-224; - * - 256 bits if \p md_info is SHA-256, SHA-384 or SHA-512. - * Note that SHA-256 is just as efficient as SHA-224. - * The security strength can be reduced if a smaller - * entropy length is set with - * mbedtls_hmac_drbg_set_entropy_len(). - * - * \note The default entropy length is the security strength - * (converted from bits to bytes). You can override - * it by calling mbedtls_hmac_drbg_set_entropy_len(). - * - * \note During the initial seeding, this function calls - * the entropy source to obtain a nonce - * whose length is half the entropy length. - */ -#if defined(MBEDTLS_THREADING_C) -/** - * \note When Mbed TLS is built with threading support, - * after this function returns successfully, - * it is safe to call mbedtls_hmac_drbg_random() - * from multiple threads. Other operations, including - * reseeding, are not thread-safe. - */ -#endif /* MBEDTLS_THREADING_C */ -/** - * \param ctx HMAC_DRBG context to be seeded. - * \param md_info MD algorithm to use for HMAC_DRBG. - * \param f_entropy The entropy callback, taking as arguments the - * \p p_entropy context, the buffer to fill, and the - * length of the buffer. - * \p f_entropy is always called with a length that is - * less than or equal to the entropy length. - * \param p_entropy The entropy context to pass to \p f_entropy. - * \param custom The personalization string. - * This can be \c NULL, in which case the personalization - * string is empty regardless of the value of \p len. - * \param len The length of the personalization string. - * This must be at most #MBEDTLS_HMAC_DRBG_MAX_INPUT - * and also at most - * #MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT - \p entropy_len * 3 / 2 - * where \p entropy_len is the entropy length - * described above. - * - * \return \c 0 if successful. - * \return #MBEDTLS_ERR_MD_BAD_INPUT_DATA if \p md_info is - * invalid. - * \return #MBEDTLS_ERR_MD_ALLOC_FAILED if there was not enough - * memory to allocate context data. - * \return #MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED - * if the call to \p f_entropy 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). - * - * This function is meant for use in algorithms that need a pseudorandom - * input such as deterministic ECDSA. - */ -#if defined(MBEDTLS_THREADING_C) -/** - * \note When Mbed TLS is built with threading support, - * after this function returns successfully, - * it is safe to call mbedtls_hmac_drbg_random() - * from multiple threads. Other operations, including - * reseeding, are not thread-safe. - */ -#endif /* MBEDTLS_THREADING_C */ -/** - * \param ctx HMAC_DRBG context to be initialised. - * \param md_info MD algorithm to use for HMAC_DRBG. - * \param data Concatenation of the initial entropy string and - * the additional data. - * \param data_len Length of \p data in bytes. - * - * \return \c 0 if successful. or - * \return #MBEDTLS_ERR_MD_BAD_INPUT_DATA if \p md_info is - * invalid. - * \return #MBEDTLS_ERR_MD_ALLOC_FAILED if there was not enough - * memory to allocate context data. - */ -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 This function turns prediction resistance on or off. - * The default value is off. - * - * \note If enabled, entropy is gathered at the beginning of - * every call to mbedtls_hmac_drbg_random_with_add() - * or mbedtls_hmac_drbg_random(). - * Only use this if your entropy source has sufficient - * throughput. - * - * \param ctx The 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 This function sets the amount of entropy grabbed on each - * seed or reseed. - * - * See the documentation of mbedtls_hmac_drbg_seed() for the default value. - * - * \param ctx The HMAC_DRBG context. - * \param len The 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. - * - * The reseed interval is the number of calls to mbedtls_hmac_drbg_random() - * or mbedtls_hmac_drbg_random_with_add() after which the entropy function - * is called again. - * - * The default value is #MBEDTLS_HMAC_DRBG_RESEED_INTERVAL. - * - * \param ctx The HMAC_DRBG context. - * \param interval The reseed interval. - */ -void mbedtls_hmac_drbg_set_reseed_interval( mbedtls_hmac_drbg_context *ctx, - int interval ); - -/** - * \brief This function updates the state of the HMAC_DRBG context. - * - * \note This function is not thread-safe. It is not safe - * to call this function if another thread might be - * concurrently obtaining random numbers from the same - * context or updating or reseeding the same context. - * - * \param ctx The HMAC_DRBG context. - * \param additional The data to update the state with. - * If this is \c NULL, there is no additional data. - * \param add_len Length of \p additional in bytes. - * Unused if \p additional is \c NULL. - * - * \return \c 0 on success, or an error from the underlying - * hash calculation. - */ -int mbedtls_hmac_drbg_update_ret( mbedtls_hmac_drbg_context *ctx, - const unsigned char *additional, size_t add_len ); - -/** - * \brief This function reseeds the HMAC_DRBG context, that is - * extracts data from the entropy source. - * - * \note This function is not thread-safe. It is not safe - * to call this function if another thread might be - * concurrently obtaining random numbers from the same - * context or updating or reseeding the same context. - * - * \param ctx The HMAC_DRBG context. - * \param additional Additional data to add to the state. - * If this is \c NULL, there is no additional data - * and \p len should be \c 0. - * \param len The length of the additional data. - * This must be at most #MBEDTLS_HMAC_DRBG_MAX_INPUT - * and also at most - * #MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT - \p entropy_len - * where \p entropy_len is the entropy length - * (see mbedtls_hmac_drbg_set_entropy_len()). - * - * \return \c 0 if successful. - * \return #MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED - * if a call to the entropy function failed. - */ -int mbedtls_hmac_drbg_reseed( mbedtls_hmac_drbg_context *ctx, - const unsigned char *additional, size_t len ); - -/** - * \brief This function updates an HMAC_DRBG instance with additional - * data and uses it to generate random data. - * - * This function automatically reseeds if the reseed counter is exceeded - * or prediction resistance is enabled. - * - * \note This function is not thread-safe. It is not safe - * to call this function if another thread might be - * concurrently obtaining random numbers from the same - * context or updating or reseeding the same context. - * - * \param p_rng The HMAC_DRBG context. This must be a pointer to a - * #mbedtls_hmac_drbg_context structure. - * \param output The buffer to fill. - * \param output_len The length of the buffer in bytes. - * This must be at most #MBEDTLS_HMAC_DRBG_MAX_REQUEST. - * \param additional Additional data to update with. - * If this is \c NULL, there is no additional data - * and \p add_len should be \c 0. - * \param add_len The length of the additional data. - * This must be at most #MBEDTLS_HMAC_DRBG_MAX_INPUT. - * - * \return \c 0 if successful. - * \return #MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED - * if a call to the entropy source failed. - * \return #MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG if - * \p output_len > #MBEDTLS_HMAC_DRBG_MAX_REQUEST. - * \return #MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG if - * \p add_len > #MBEDTLS_HMAC_DRBG_MAX_INPUT. - */ -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 This function uses HMAC_DRBG to generate random data. - * - * This function automatically reseeds if the reseed counter is exceeded - * or prediction resistance is enabled. - */ -#if defined(MBEDTLS_THREADING_C) -/** - * \note When Mbed TLS is built with threading support, - * it is safe to call mbedtls_ctr_drbg_random() - * from multiple threads. Other operations, including - * reseeding, are not thread-safe. - */ -#endif /* MBEDTLS_THREADING_C */ -/** - * \param p_rng The HMAC_DRBG context. This must be a pointer to a - * #mbedtls_hmac_drbg_context structure. - * \param output The buffer to fill. - * \param out_len The length of the buffer in bytes. - * This must be at most #MBEDTLS_HMAC_DRBG_MAX_REQUEST. - * - * \return \c 0 if successful. - * \return #MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED - * if a call to the entropy source failed. - * \return #MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG if - * \p out_len > #MBEDTLS_HMAC_DRBG_MAX_REQUEST. - */ -int mbedtls_hmac_drbg_random( void *p_rng, unsigned char *output, size_t out_len ); - -/** - * \brief This function resets HMAC_DRBG context to the state immediately - * after initial call of mbedtls_hmac_drbg_init(). - * - * \param ctx The 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 This function updates the state of the HMAC_DRBG context. - * - * \deprecated Superseded by mbedtls_hmac_drbg_update_ret() - * in 2.16.0. - * - * \param ctx The HMAC_DRBG context. - * \param additional The data to update the state with. - * If this is \c NULL, there is no additional data. - * \param add_len Length of \p additional in bytes. - * Unused if \p additional is \c NULL. - */ -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 This function writes a seed file. - * - * \param ctx The HMAC_DRBG context. - * \param path The name of the file. - * - * \return \c 0 on success. - * \return #MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR on file error. - * \return #MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED on reseed - * failure. - */ -int mbedtls_hmac_drbg_write_seed_file( mbedtls_hmac_drbg_context *ctx, const char *path ); - -/** - * \brief This function reads and updates a seed file. The seed - * is added to this instance. - * - * \param ctx The HMAC_DRBG context. - * \param path The name of the file. - * - * \return \c 0 on success. - * \return #MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR on file error. - * \return #MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED on - * reseed failure. - * \return #MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG if the existing - * seed file is too large. - */ -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 The HMAC_DRBG Checkup routine. - * - * \return \c 0 if successful. - * \return \c 1 if the test failed. - */ -int mbedtls_hmac_drbg_self_test( int verbose ); -#endif - -#ifdef __cplusplus -} -#endif - -#endif /* hmac_drbg.h */ |