/*
 * Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
 *
 * This file is part of Open5GS.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#if !defined(OGS_CRYPT_INSIDE) && !defined(OGS_CRYPT_COMPILATION)
#error "This header cannot be included directly."
#endif

#ifndef OGS_SHA1_HMAC_H
#define OGS_SHA1_HMAC_H

#ifdef __cplusplus
extern "C" {
#endif

typedef struct {
    ogs_sha1_ctx ctx_inside;
    ogs_sha1_ctx ctx_outside;

    /* for hmac_reinit */
    ogs_sha1_ctx ctx_inside_reinit;
    ogs_sha1_ctx ctx_outside_reinit;

    uint8_t block_ipad[OGS_SHA1_BLOCK_SIZE];
    uint8_t block_opad[OGS_SHA1_BLOCK_SIZE];
} ogs_hmac_sha1_ctx;

void ogs_hmac_sha1_init(ogs_hmac_sha1_ctx *ctx, const uint8_t *key,
                      uint32_t key_size);
void ogs_hmac_sha1_reinit(ogs_hmac_sha1_ctx *ctx);
void ogs_hmac_sha1_update(ogs_hmac_sha1_ctx *ctx, const uint8_t *message,
                        uint32_t message_len);
void ogs_hmac_sha1_final(ogs_hmac_sha1_ctx *ctx, uint8_t *mac,
                       uint32_t mac_size);
void ogs_hmac_sha1(const uint8_t *key, uint32_t key_size,
                 const uint8_t *message, uint32_t message_len,
                 uint8_t *mac, uint32_t mac_size);

#ifdef __cplusplus
}
#endif

#endif /* OGS_SHA1_HMAC_H */