b0edda11cb
Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/5689)
80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
/*
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* Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*
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* Licensed under the OpenSSL licenses, (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* https://www.openssl.org/source/license.html
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* or in the file LICENSE in the source distribution.
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*/
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#ifndef HEADER_RAND_INT_H
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# define HEADER_RAND_INT_H
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# include <openssl/rand.h>
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/* forward declaration */
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typedef struct rand_pool_st RAND_POOL;
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void rand_cleanup_int(void);
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void rand_drbg_cleanup_int(void);
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void drbg_delete_thread_state(void);
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void rand_fork(void);
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/* Hardware-based seeding functions. */
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size_t rand_acquire_entropy_from_tsc(RAND_POOL *pool);
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size_t rand_acquire_entropy_from_cpu(RAND_POOL *pool);
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/* DRBG entropy callbacks. */
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size_t rand_drbg_get_entropy(RAND_DRBG *drbg,
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unsigned char **pout,
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int entropy, size_t min_len, size_t max_len,
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int prediction_resistance);
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void rand_drbg_cleanup_entropy(RAND_DRBG *drbg,
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unsigned char *out, size_t outlen);
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size_t rand_drbg_get_additional_data(unsigned char **pout, size_t max_len);
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/*
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* RAND_POOL functions
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*/
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RAND_POOL *rand_pool_new(int entropy_requested, size_t min_len, size_t max_len);
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void rand_pool_free(RAND_POOL *pool);
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const unsigned char *rand_pool_buffer(RAND_POOL *pool);
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unsigned char *rand_pool_detach(RAND_POOL *pool);
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size_t rand_pool_entropy(RAND_POOL *pool);
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size_t rand_pool_length(RAND_POOL *pool);
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size_t rand_pool_entropy_available(RAND_POOL *pool);
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size_t rand_pool_entropy_needed(RAND_POOL *pool);
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size_t rand_pool_bytes_needed(RAND_POOL *pool, unsigned int entropy_per_byte);
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size_t rand_pool_bytes_remaining(RAND_POOL *pool);
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size_t rand_pool_add(RAND_POOL *pool,
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const unsigned char *buffer, size_t len, size_t entropy);
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unsigned char *rand_pool_add_begin(RAND_POOL *pool, size_t len);
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size_t rand_pool_add_end(RAND_POOL *pool, size_t len, size_t entropy);
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/*
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* Add random bytes to the pool to acquire requested amount of entropy
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*
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* This function is platform specific and tries to acquire the requested
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* amount of entropy by polling platform specific entropy sources.
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*
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* If the function succeeds in acquiring at least |entropy_requested| bits
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* of entropy, the total entropy count is returned. If it fails, it returns
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* an entropy count of 0.
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*/
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size_t rand_pool_acquire_entropy(RAND_POOL *pool);
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#endif
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