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/* nettle-types.h */

/* nettle, low-level cryptographics library
 *
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 * Copyright (C) 2005, 2014 Niels Möller
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 *  
 * The nettle library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or (at your
 * option) any later version.
 * 
 * The nettle library 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 Lesser General Public
 * License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with the nettle library; see the file COPYING.LIB.  If not, write to
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 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02111-1301, USA.
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 */

#ifndef NETTLE_TYPES_H
#define NETTLE_TYPES_H

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/* For size_t */
#include <stddef.h>

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/* Pretend these types always exists. Nettle doesn't use them. */
#define _STDINT_HAVE_INT_FAST32_T 1
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#include "nettle-stdint.h"

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#ifdef __cplusplus
extern "C" {
#endif

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/* An aligned 16-byte block. */
union nettle_block16
{
  uint8_t b[16];
  unsigned long w[16 / sizeof(unsigned long)];
};

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/* Randomness. Used by key generation and dsa signature creation. */
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typedef void nettle_random_func(void *ctx,
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				size_t length, uint8_t *dst);
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/* Progress report function, mainly for key generation. */
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typedef void nettle_progress_func(void *ctx, int c);

/* Realloc function, used by struct nettle_buffer. */
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typedef void *nettle_realloc_func(void *ctx, void *p, size_t length);
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/* Ciphers */
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typedef void nettle_set_key_func(void *ctx, const uint8_t *key);
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/* For block ciphers, const context. */
typedef void nettle_cipher_func(const void *ctx,
				size_t length, uint8_t *dst,
				const uint8_t *src);
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/* Uses a void * for cipher contexts. Used for crypt operations where
   the internal state changes during the encryption. */
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typedef void nettle_crypt_func(void *ctx,
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			       size_t length, uint8_t *dst,
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			       const uint8_t *src);
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/* Hash algorithms */
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typedef void nettle_hash_init_func(void *ctx);
typedef void nettle_hash_update_func(void *ctx,
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				     size_t length,
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				     const uint8_t *src);
typedef void nettle_hash_digest_func(void *ctx,
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				     size_t length, uint8_t *dst);
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/* ASCII armor codecs. NOTE: Experimental and subject to change. */

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typedef size_t nettle_armor_length_func(size_t length);
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typedef void nettle_armor_init_func(void *ctx);
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typedef size_t nettle_armor_encode_update_func(void *ctx,
					       uint8_t *dst,
					       size_t src_length,
					       const uint8_t *src);
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typedef size_t nettle_armor_encode_final_func(void *ctx, uint8_t *dst);
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typedef int nettle_armor_decode_update_func(void *ctx,
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					    size_t *dst_length,
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					    uint8_t *dst,
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					    size_t src_length,
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					    const uint8_t *src);
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typedef int nettle_armor_decode_final_func(void *ctx);
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#ifdef __cplusplus
}
#endif
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#endif /* NETTLE_TYPES_H */