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40 lines
881 B
C
40 lines
881 B
C
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#ifndef NISTSEEDEXPANDER_H
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#define NISTSEEDEXPANDER_H
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//
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// rng.h
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//
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// Created by Bassham, Lawrence E (Fed) on 8/29/17.
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// Copyright © 2017 Bassham, Lawrence E (Fed). All rights reserved.
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// Modified for PQClean by Sebastian Verschoor
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//
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#include <stddef.h>
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#include <stdint.h>
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#define NISTSEEDEXPANDER_SEED_LEN 32
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#define RNG_SUCCESS ( 0)
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#define RNG_BAD_MAXLEN (-1)
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#define RNG_BAD_OUTBUF (-2)
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#define RNG_BAD_REQ_LEN (-3)
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typedef struct {
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uint8_t buffer[16];
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size_t buffer_pos;
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size_t length_remaining;
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uint8_t key[NISTSEEDEXPANDER_SEED_LEN];
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uint8_t ctr[16];
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} AES_XOF_struct;
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int
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seedexpander_init(AES_XOF_struct *ctx,
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const uint8_t *seed,
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const uint8_t *diversifier,
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size_t maxlen);
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int
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seedexpander(AES_XOF_struct *ctx, uint8_t *x, size_t xlen);
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#endif /* NISTSEEDEXPANDER_H */
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