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34 lines
972 B
C
34 lines
972 B
C
/*
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* (c) 2015-2017 Marcos Del Sol Vives
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* (c) 2016 javiMaD
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*
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* SPDX-License-Identifier: MIT
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*/
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#ifndef HAVE_NFC3D_DRBG_H
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#define HAVE_NFC3D_DRBG_H
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#include <stdbool.h>
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#include <stdint.h>
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#include "mbedtls/md.h"
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#define NFC3D_DRBG_MAX_SEED_SIZE 480 /* Hardcoded max size in 3DS NFC module */
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#define NFC3D_DRBG_OUTPUT_SIZE 32 /* Every iteration generates 32 bytes */
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typedef struct {
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mbedtls_md_context_t hmacCtx;
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bool used;
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uint16_t iteration;
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uint8_t buffer[sizeof(uint16_t) + NFC3D_DRBG_MAX_SEED_SIZE];
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size_t bufferSize;
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} nfc3d_drbg_ctx;
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void nfc3d_drbg_init(nfc3d_drbg_ctx *ctx, const uint8_t *hmacKey, size_t hmacKeySize, const uint8_t *seed, size_t seedSize);
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void nfc3d_drbg_step(nfc3d_drbg_ctx *ctx, uint8_t *output);
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void nfc3d_drbg_cleanup(nfc3d_drbg_ctx *ctx);
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void nfc3d_drbg_generate_bytes(const uint8_t *hmacKey, size_t hmacKeySize, const uint8_t *seed, size_t seedSize, uint8_t *output, size_t outputSize);
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#endif
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