lc_kdf_fb.h

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/*
 * Copyright (C) 2022 - 2024, Stephan Mueller <smueller@chronox.de>
 *
 * License: see LICENSE file in root directory
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF
 * WHICH ARE HEREBY DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 * USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */
 
#ifndef LC_KDF_FB_H
#define LC_KDF_FB_H
 
#include "ext_headers.h"
#include "lc_hash.h"
#include "lc_hmac.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
int lc_kdf_fb_init(struct lc_hmac_ctx *hmac_ctx, const uint8_t *key,
                   size_t keylen);
 
int lc_kdf_fb_generate(struct lc_hmac_ctx *hmac_ctx, const uint8_t *iv,
                       size_t ivlen, const uint8_t *label, size_t labellen,
                       uint8_t *dst, size_t dlen);
 
int lc_kdf_fb(const struct lc_hash *hash, const uint8_t *key, size_t keylen,
              const uint8_t *iv, size_t ivlen, const uint8_t *label,
              size_t labellen, uint8_t *dst, size_t dlen);
 
#ifdef __cplusplus
}
#endif
 
#endif /* LC_KDF_FB_H */