/* crypto/ecdh/ech_locl.h */
/* ====================================================================
 * Copyright (c) 2000-2005 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *    notice, this list of conditions and the following disclaimer in
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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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 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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 *    licensing@OpenSSL.org.
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 * 5. Products derived from this software may not be called "OpenSSL"
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 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#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));
    int flags;
    char *app_data;
};

/*
 * If this flag is set the ECDH method is FIPS compliant and can be used in
 * FIPS mode. This is set in the validated module method. If an application
 * sets this flag in its own methods it is its responsibility to ensure the
 * result is compliant.
 */

# define ECDH_FLAG_FIPS_METHOD   0x1

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 */
