LCOM1920-T02G10

/* crypto/ecdsa/ecdsa.h */

/**

 * \file   crypto/ecdsa/ecdsa.h Include file for the OpenSSL ECDSA functions

 * \author 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_ECDSA_H

# define HEADER_ECDSA_H

# include <openssl/opensslconf.h>

# ifdef OPENSSL_NO_ECDSA

#  error ECDSA is disabled.

# endif

# include <openssl/ec.h>

# include <openssl/ossl_typ.h>

# ifndef OPENSSL_NO_DEPRECATED

#  include <openssl/bn.h>

# endif

#ifdef __cplusplus

extern "C" {

#endif

typedef struct ECDSA_SIG_st {

    BIGNUM *r;

    BIGNUM *s;

} ECDSA_SIG;

/** Allocates and initialize a ECDSA_SIG structure

 *  \return pointer to a ECDSA_SIG structure or NULL if an error occurred

 */

ECDSA_SIG *ECDSA_SIG_new(void);

/** frees a ECDSA_SIG structure

 *  \param  sig  pointer to the ECDSA_SIG structure

 */

void ECDSA_SIG_free(ECDSA_SIG *sig);

/** DER encode content of ECDSA_SIG object (note: this function modifies *pp

 *  (*pp += length of the DER encoded signature)).

 *  \param  sig  pointer to the ECDSA_SIG object

 *  \param  pp   pointer to a unsigned char pointer for the output or NULL

 *  \return the length of the DER encoded ECDSA_SIG object or 0

 */

int i2d_ECDSA_SIG(const ECDSA_SIG *sig, unsigned char **pp);

/** Decodes a DER encoded ECDSA signature (note: this function changes *pp

 *  (*pp += len)).

 *  \param  sig  pointer to ECDSA_SIG pointer (may be NULL)

 *  \param  pp   memory buffer with the DER encoded signature

 *  \param  len  length of the buffer

 *  \return pointer to the decoded ECDSA_SIG structure (or NULL)

 */

ECDSA_SIG *d2i_ECDSA_SIG(ECDSA_SIG **sig, const unsigned char **pp, long len);

/** Computes the ECDSA signature of the given hash value using

 *  the supplied private key and returns the created signature.

 *  \param  dgst      pointer to the hash value

 *  \param  dgst_len  length of the hash value

 *  \param  eckey     EC_KEY object containing a private EC key

 *  \return pointer to a ECDSA_SIG structure or NULL if an error occurred

 */

ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst, int dgst_len,

                         EC_KEY *eckey);

/** Computes ECDSA signature of a given hash value using the supplied

 *  private key (note: sig must point to ECDSA_size(eckey) bytes of memory).

 *  \param  dgst     pointer to the hash value to sign

 *  \param  dgstlen  length of the hash value

 *  \param  kinv     BIGNUM with a pre-computed inverse k (optional)

 *  \param  rp       BIGNUM with a pre-computed rp value (optioanl),

 *                   see ECDSA_sign_setup

 *  \param  eckey    EC_KEY object containing a private EC key

 *  \return pointer to a ECDSA_SIG structure or NULL if an error occurred

 */

ECDSA_SIG *ECDSA_do_sign_ex(const unsigned char *dgst, int dgstlen,

                            const BIGNUM *kinv, const BIGNUM *rp,

                            EC_KEY *eckey);

/** Verifies that the supplied signature is a valid ECDSA

 *  signature of the supplied hash value using the supplied public key.

 *  \param  dgst      pointer to the hash value

 *  \param  dgst_len  length of the hash value

 *  \param  sig       ECDSA_SIG structure

 *  \param  eckey     EC_KEY object containing a public EC key

 *  \return 1 if the signature is valid, 0 if the signature is invalid

 *          and -1 on error

 */

int ECDSA_do_verify(const unsigned char *dgst, int dgst_len,

                    const ECDSA_SIG *sig, EC_KEY *eckey);

const ECDSA_METHOD *ECDSA_OpenSSL(void);

/** Sets the default ECDSA method

 *  \param  meth  new default ECDSA_METHOD

 */

void ECDSA_set_default_method(const ECDSA_METHOD *meth);

/** Returns the default ECDSA method

 *  \return pointer to ECDSA_METHOD structure containing the default method

 */

const ECDSA_METHOD *ECDSA_get_default_method(void);

/** Sets method to be used for the ECDSA operations

 *  \param  eckey  EC_KEY object

 *  \param  meth   new method

 *  \return 1 on success and 0 otherwise

 */

int ECDSA_set_method(EC_KEY *eckey, const ECDSA_METHOD *meth);

/** Returns the maximum length of the DER encoded signature

 *  \param  eckey  EC_KEY object

 *  \return numbers of bytes required for the DER encoded signature

 */

int ECDSA_size(const EC_KEY *eckey);

/** Precompute parts of the signing operation

 *  \param  eckey  EC_KEY object containing a private EC key

 *  \param  ctx    BN_CTX object (optional)

 *  \param  kinv   BIGNUM pointer for the inverse of k

 *  \param  rp     BIGNUM pointer for x coordinate of k * generator

 *  \return 1 on success and 0 otherwise

 */

int ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx, BIGNUM **kinv, BIGNUM **rp);

/** Computes ECDSA signature of a given hash value using the supplied

 *  private key (note: sig must point to ECDSA_size(eckey) bytes of memory).

 *  \param  type     this parameter is ignored

 *  \param  dgst     pointer to the hash value to sign

 *  \param  dgstlen  length of the hash value

 *  \param  sig      memory for the DER encoded created signature

 *  \param  siglen   pointer to the length of the returned signature

 *  \param  eckey    EC_KEY object containing a private EC key

 *  \return 1 on success and 0 otherwise

 */

int ECDSA_sign(int type, const unsigned char *dgst, int dgstlen,

               unsigned char *sig, unsigned int *siglen, EC_KEY *eckey);

/** Computes ECDSA signature of a given hash value using the supplied

 *  private key (note: sig must point to ECDSA_size(eckey) bytes of memory).

 *  \param  type     this parameter is ignored

 *  \param  dgst     pointer to the hash value to sign

 *  \param  dgstlen  length of the hash value

 *  \param  sig      buffer to hold the DER encoded signature

 *  \param  siglen   pointer to the length of the returned signature

 *  \param  kinv     BIGNUM with a pre-computed inverse k (optional)

 *  \param  rp       BIGNUM with a pre-computed rp value (optioanl),

 *                   see ECDSA_sign_setup

 *  \param  eckey    EC_KEY object containing a private EC key

 *  \return 1 on success and 0 otherwise

 */

int ECDSA_sign_ex(int type, const unsigned char *dgst, int dgstlen,

                  unsigned char *sig, unsigned int *siglen,

                  const BIGNUM *kinv, const BIGNUM *rp, EC_KEY *eckey);

/** Verifies that the given signature is valid ECDSA signature

 *  of the supplied hash value using the specified public key.

 *  \param  type     this parameter is ignored

 *  \param  dgst     pointer to the hash value

 *  \param  dgstlen  length of the hash value

 *  \param  sig      pointer to the DER encoded signature

 *  \param  siglen   length of the DER encoded signature

 *  \param  eckey    EC_KEY object containing a public EC key

 *  \return 1 if the signature is valid, 0 if the signature is invalid

 *          and -1 on error

 */

int ECDSA_verify(int type, const unsigned char *dgst, int dgstlen,

                 const unsigned char *sig, int siglen, EC_KEY *eckey);

/* the standard ex_data functions */

int ECDSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new

                           *new_func, CRYPTO_EX_dup *dup_func,

                           CRYPTO_EX_free *free_func);

int ECDSA_set_ex_data(EC_KEY *d, int idx, void *arg);

void *ECDSA_get_ex_data(EC_KEY *d, int idx);

/* BEGIN ERROR CODES */

/*

 * The following lines are auto generated by the script mkerr.pl. Any changes

 * made after this point may be overwritten when the script is next run.

 */

void ERR_load_ECDSA_strings(void);

/* Error codes for the ECDSA functions. */

/* Function codes. */

# define ECDSA_F_ECDSA_CHECK                              104

# define ECDSA_F_ECDSA_DATA_NEW_METHOD                    100

# define ECDSA_F_ECDSA_DO_SIGN                            101

# define ECDSA_F_ECDSA_DO_VERIFY                          102

# define ECDSA_F_ECDSA_SIGN_SETUP                         103

/* Reason codes. */

# define ECDSA_R_BAD_SIGNATURE                            100

# define ECDSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE              101

# define ECDSA_R_ERR_EC_LIB                               102

# define ECDSA_R_MISSING_PARAMETERS                       103

# define ECDSA_R_NEED_NEW_SETUP_VALUES                    106

# define ECDSA_R_NON_FIPS_METHOD                          107

# define ECDSA_R_RANDOM_NUMBER_GENERATION_FAILED          104

# define ECDSA_R_SIGNATURE_MALLOC_FAILED                  105

#ifdef  __cplusplus

}

#endif

#endif