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* HMAC-SHA256 message authentication code.
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/* nettle, low-level cryptographics library
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* Copyright (C) 2003 Niels M�ller
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* The nettle library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or (at your
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* option) any later version.
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* The nettle library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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* You should have received a copy of the GNU Lesser General Public License
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* along with the nettle library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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hmac_sha256_set_key(struct hmac_sha256_ctx *ctx,
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unsigned key_length, const uint8_t *key)
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HMAC_SET_KEY(ctx, &nettle_sha256, key_length, key);
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hmac_sha256_update(struct hmac_sha256_ctx *ctx,
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unsigned length, const uint8_t *data)
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sha256_update(&ctx->state, length, data);
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hmac_sha256_digest(struct hmac_sha256_ctx *ctx,
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unsigned length, uint8_t *digest)
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HMAC_DIGEST(ctx, &nettle_sha256, length, digest);