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53 lines
1.5 KiB
53 lines
1.5 KiB
/******************************************************************************
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*
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* Copyright 2017 Xaptum, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License
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*
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*****************************************************************************/
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#ifndef ECDAA_COMMON_RANDPOOL_H
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#define ECDAA_COMMON_RANDPOOL_H
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#pragma once
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stddef.h>
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#include <stdint.h>
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// NOTE: We promise our users that this MUST be <256.
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// This is so getrandom (on Linux) and getentropy (on OpenBSD)
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// can be used as the the source of randomness
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#define MAX_RAND_POOL_SIZE 255
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struct ecdaa_rand_pool {
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uint8_t pool[MAX_RAND_POOL_SIZE];
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size_t size;
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uint8_t *pool_ptr;
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void (*get_random)(void *buf, size_t buflen);
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};
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void ecdaa_rand_pool_init(struct ecdaa_rand_pool *pool,
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size_t requested_size,
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void (*get_random)(void *buf, size_t buflen));
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uint8_t get_random_byte(struct ecdaa_rand_pool *pool);
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#ifdef __cplusplus
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}
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#endif
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#endif
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