ndn-lite-sha.h

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/*
 * Copyright (C) 2018 - 2019 Zhiyi Zhang, Tianyuan Yu
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v3.0. See the file LICENSE in the top level
 * directory for more details.
 */

#ifndef NDN_SECURITY_SHA_H_
#define NDN_SECURITY_SHA_H_

#include "ndn-lite-sec-config.h"
#include "../ndn-error-code.h"
#include "../ndn-constants.h"

#ifdef __cplusplus
extern "C" {
#endif

typedef struct abstract_sha256_state abstract_sha256_state_t;

typedef int (*ndn_sha256_init_impl)(abstract_sha256_state_t* state);
typedef int (*ndn_sha256_update_impl)(abstract_sha256_state_t* state, const uint8_t* data, uint32_t datalen);
typedef int (*ndn_sha256_finish_impl)(abstract_sha256_state_t* state, uint8_t* hash_result);

typedef struct ndn_sha_backend {
  ndn_sha256_init_impl sha256_init;
  ndn_sha256_update_impl sha256_update;
  ndn_sha256_finish_impl sha256_finish;
} ndn_sha_backend_t;


typedef struct ndn_sha256_state {
  abstract_sha256_state_t abs_state;

} ndn_sha256_state_t;

ndn_sha_backend_t*
ndn_sha_get_backend(void);


int
ndn_sha256_init(ndn_sha256_state_t* state);

/*
 *  SHA256 update procedure. Hashes datalen bytes addressed by data into state
 *  @note Assumes state has been initialized
 *  @param state. Input. SHA256 state struct.
 *  @param data. Input. message to hash.
 *  @param datalen. Input. length of message to hash.
 *  @return NDN_SUCCESS (0) if there is no error.
 */
int
ndn_sha256_update(ndn_sha256_state_t* state, const uint8_t* data, uint32_t datalen);

int
ndn_sha256_finish(ndn_sha256_state_t* state, uint8_t* hash_result);

int
ndn_sha256(const uint8_t* data, uint32_t datalen, uint8_t* hash_result);

int
ndn_sha256_sign(const uint8_t* input_value, uint32_t input_size,
                uint8_t* output_value, uint32_t output_max_size,
                uint32_t* output_used_size);

int
ndn_sha256_verify(const uint8_t* input_value, uint32_t input_size,
                  const uint8_t* sig_value, uint32_t sig_size);

#ifdef __cplusplus
}
#endif

#endif // NDN_SECURITY_AES_H_