/* crypto/ecdh/ech_locl.h */
/* ====================================================================
 * Copyright (c) 2000-2005 The OpenSSL Project.  All rights reserved.
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 * modification, are permitted provided that the following conditions
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 *    distribution.
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 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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 *    [email protected].
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 * 5. Products derived from this software may not be called "OpenSSL"
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 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
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 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * ([email protected]).  This product includes software written by Tim
 * Hudson ([email protected]).
 *
 */

#ifndef HEADER_ECH_LOCL_H
#define HEADER_ECH_LOCL_H

#include <openssl/ecdh.h>

#ifdef  __cplusplus
extern "C" {
#endif

struct ecdh_method 
	{
	const char *name;
	int (*compute_key)(void *key, size_t outlen, const EC_POINT *pub_key, EC_KEY *ecdh,
	                   void *(*KDF)(const void *in, size_t inlen, void *out, size_t *outlen));
#if 0
	int (*init)(EC_KEY *eckey);
	int (*finish)(EC_KEY *eckey);
#endif
	int flags;
	char *app_data;
	};

typedef struct ecdh_data_st {
	/* EC_KEY_METH_DATA part */
	int (*init)(EC_KEY *);
	/* method specific part */
	ENGINE	*engine;
	int	flags;
	const ECDH_METHOD *meth;
	CRYPTO_EX_DATA ex_data;
} ECDH_DATA;

ECDH_DATA *ecdh_check(EC_KEY *);

#ifdef  __cplusplus
}
#endif

#endif /* HEADER_ECH_LOCL_H */