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/* crypto/ecdsa/ecs_locl.h */
/*
 * Written by Nils Larsch for the OpenSSL project
 */
/* ====================================================================
 * 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
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 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/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 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
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * 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_ECS_LOCL_H
# define HEADER_ECS_LOCL_H

# include <openssl/ecdsa.h>

#ifdef  __cplusplus
extern "C" {
#endif

struct ecdsa_method {
    const char *name;
    ECDSA_SIG *(*ecdsa_do_sign) (const unsigned char *dgst, int dgst_len,
                                 const BIGNUM *inv, const BIGNUM *rp,
                                 EC_KEY *eckey);
    int (*ecdsa_sign_setup) (EC_KEY *eckey, BN_CTX *ctx, BIGNUM **kinv,
                             BIGNUM **r);
    int (*ecdsa_do_verify) (const unsigned char *dgst, int dgst_len,
                            const ECDSA_SIG *sig, EC_KEY *eckey);
# if 0
    int (*init) (EC_KEY *eckey);
    int (*finish) (EC_KEY *eckey);
# endif
    int flags;
    void *app_data;
};

/* The ECDSA_METHOD was allocated and can be freed */

# define ECDSA_METHOD_FLAG_ALLOCATED 0x2

/*
 * If this flag is set the ECDSA 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 ECDSA_FLAG_FIPS_METHOD  0x1

typedef struct ecdsa_data_st {
    /* EC_KEY_METH_DATA part */
    int (*init) (EC_KEY *);
    /* method (ECDSA) specific part */
    ENGINE *engine;
    int flags;
    const ECDSA_METHOD *meth;
    CRYPTO_EX_DATA ex_data;
} ECDSA_DATA;

/** ecdsa_check
 * checks whether ECKEY->meth_data is a pointer to a ECDSA_DATA structure
 * and if not it removes the old meth_data and creates a ECDSA_DATA structure.
 * \param  eckey pointer to a EC_KEY object
 * \return pointer to a ECDSA_DATA structure
 */
ECDSA_DATA *ecdsa_check(EC_KEY *eckey);

#ifdef  __cplusplus
}
#endif

#endif                          /* HEADER_ECS_LOCL_H */