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39 lines
1.1 KiB
C
39 lines
1.1 KiB
C
#pragma once
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#include "sha256.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct hmac_context {
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void (*init_hash)(const struct hmac_context* context);
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void (*update_hash)(
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const struct hmac_context* context,
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const uint8_t* message,
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unsigned message_size);
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void (*finish_hash)(const struct hmac_context* context, uint8_t* hash_result);
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unsigned block_size; /* Hash function block size in bytes, eg 64 for SHA-256. */
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unsigned result_size; /* Hash function result size in bytes, eg 32 for SHA-256. */
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uint8_t* tmp; /* Must point to a buffer of at least (2 * result_size + block_size) bytes. */
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} hmac_context;
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typedef struct hmac_sha256_context {
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hmac_context hmac_ctx;
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sha256_context sha_ctx;
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uint8_t tmp[32 * 2 + 64];
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} hmac_sha256_context;
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void hmac_sha256_init(hmac_sha256_context* ctx, const uint8_t* K);
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void hmac_sha256_update(
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const hmac_sha256_context* ctx,
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const uint8_t* message,
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unsigned message_size);
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void hmac_sha256_finish(const hmac_sha256_context* ctx, const uint8_t* K, uint8_t* hash_result);
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#ifdef __cplusplus
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}
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#endif
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