/* crypto/ec/ec.h *//* ==================================================================== * Copyright (c) 1998-2001 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 *    openssl-core@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_EC_H#define HEADER_EC_H#ifdef OPENSSL_NO_EC#error EC is disabled.#endif#include <openssl/bn.h>#include <openssl/symhacks.h>#ifdef  __cplusplusextern "C" {#endiftypedef enum {	/* values as defined in X9.62 (ECDSA) and elsewhere */	POINT_CONVERSION_COMPRESSED = 2,	POINT_CONVERSION_UNCOMPRESSED = 4,	POINT_CONVERSION_HYBRID = 6} point_conversion_form_t;typedef struct ec_method_st EC_METHOD;typedef struct ec_group_st	/*	 EC_METHOD *meth;	 -- field definition	 -- curve coefficients	 -- optional generator with associated information (order, cofactor)	 -- optional extra data (TODO: precomputed table for fast computation of multiples of generator)	*/	EC_GROUP;typedef struct ec_point_st EC_POINT;/* EC_METHODs for curves over GF(p). * EC_GFp_simple_method provides the basis for the optimized methods. */const EC_METHOD *EC_GFp_simple_method(void);const EC_METHOD *EC_GFp_mont_method(void);#if 0const EC_METHOD *EC_GFp_recp_method(void); /* TODO */const EC_METHOD *EC_GFp_nist_method(void); /* TODO */#endifEC_GROUP *EC_GROUP_new(const EC_METHOD *);void EC_GROUP_free(EC_GROUP *);void EC_GROUP_clear_free(EC_GROUP *);int EC_GROUP_copy(EC_GROUP *, const EC_GROUP *);const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *);	/* We don't have types for field specifications and field elements in general. * Otherwise we could declare *     int EC_GROUP_set_curve(EC_GROUP *, .....); */int EC_GROUP_set_curve_GFp(EC_GROUP *, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *);int EC_GROUP_get_curve_GFp(const EC_GROUP *, BIGNUM *p, BIGNUM *a, BIGNUM *b, BN_CTX *);/* EC_GROUP_new_GFp() calls EC_GROUP_new() and EC_GROUP_set_GFp() * after choosing an appropriate EC_METHOD */EC_GROUP *EC_GROUP_new_curve_GFp(const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *);int EC_GROUP_set_generator(EC_GROUP *, const EC_POINT *generator, const BIGNUM *order, const BIGNUM *cofactor);EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *);int EC_GROUP_get_order(const EC_GROUP *, BIGNUM *order, BN_CTX *);int EC_GROUP_get_cofactor(const EC_GROUP *, BIGNUM *cofactor, BN_CTX *);EC_POINT *EC_POINT_new(const EC_GROUP *);void EC_POINT_free(EC_POINT *);void EC_POINT_clear_free(EC_POINT *);int EC_POINT_copy(EC_POINT *, const EC_POINT *); const EC_METHOD *EC_POINT_method_of(const EC_POINT *);int EC_POINT_set_to_infinity(const EC_GROUP *, EC_POINT *);int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *, EC_POINT *,	const BIGNUM *x, const BIGNUM *y, const BIGNUM *z, BN_CTX *);int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *, const EC_POINT *,	BIGNUM *x, BIGNUM *y, BIGNUM *z, BN_CTX *);int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *, EC_POINT *,	const BIGNUM *x, const BIGNUM *y, BN_CTX *);int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *, const EC_POINT *,	BIGNUM *x, BIGNUM *y, BN_CTX *);int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *, EC_POINT *,	const BIGNUM *x, int y_bit, BN_CTX *);size_t EC_POINT_point2oct(const EC_GROUP *, const EC_POINT *, point_conversion_form_t form,        unsigned char *buf, size_t len, BN_CTX *);int EC_POINT_oct2point(const EC_GROUP *, EC_POINT *,        const unsigned char *buf, size_t len, BN_CTX *);int EC_POINT_add(const EC_GROUP *, EC_POINT *r, const EC_POINT *a, const EC_POINT *b, BN_CTX *);int EC_POINT_dbl(const EC_GROUP *, EC_POINT *r, const EC_POINT *a, BN_CTX *);int EC_POINT_invert(const EC_GROUP *, EC_POINT *, BN_CTX *);int EC_POINT_is_at_infinity(const EC_GROUP *, const EC_POINT *);int EC_POINT_is_on_curve(const EC_GROUP *, const EC_POINT *, BN_CTX *);int EC_POINT_cmp(const EC_GROUP *, const EC_POINT *a, const EC_POINT *b, BN_CTX *);int EC_POINT_make_affine(const EC_GROUP *, EC_POINT *, BN_CTX *);int EC_POINTs_make_affine(const EC_GROUP *, size_t num, EC_POINT *[], BN_CTX *);int EC_POINTs_mul(const EC_GROUP *, EC_POINT *r, const BIGNUM *, size_t num, const EC_POINT *[], const BIGNUM *[], BN_CTX *);int EC_POINT_mul(const EC_GROUP *, EC_POINT *r, const BIGNUM *, const EC_POINT *, const BIGNUM *, BN_CTX *);int EC_GROUP_precompute_mult(EC_GROUP *, BN_CTX *);/* 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_EC_strings(void);/* Error codes for the EC functions. *//* Function codes. */#define EC_F_COMPUTE_WNAF				 143#define EC_F_EC_GFP_MONT_FIELD_DECODE			 133#define EC_F_EC_GFP_MONT_FIELD_ENCODE			 134#define EC_F_EC_GFP_MONT_FIELD_MUL			 131#define EC_F_EC_GFP_MONT_FIELD_SQR			 132#define EC_F_EC_GFP_SIMPLE_GROUP_SET_CURVE_GFP		 100#define EC_F_EC_GFP_SIMPLE_GROUP_SET_GENERATOR		 101#define EC_F_EC_GFP_SIMPLE_MAKE_AFFINE			 102#define EC_F_EC_GFP_SIMPLE_OCT2POINT			 103#define EC_F_EC_GFP_SIMPLE_POINT2OCT			 104#define EC_F_EC_GFP_SIMPLE_POINTS_MAKE_AFFINE		 137#define EC_F_EC_GFP_SIMPLE_POINT_GET_AFFINE_COORDINATES_GFP 105#define EC_F_EC_GFP_SIMPLE_POINT_SET_AFFINE_COORDINATES_GFP 128#define EC_F_EC_GFP_SIMPLE_SET_COMPRESSED_COORDINATES_GFP 129#define EC_F_EC_GROUP_COPY				 106#define EC_F_EC_GROUP_GET0_GENERATOR			 139#define EC_F_EC_GROUP_GET_COFACTOR			 140#define EC_F_EC_GROUP_GET_CURVE_GFP			 130#define EC_F_EC_GROUP_GET_ORDER				 141#define EC_F_EC_GROUP_NEW				 108#define EC_F_EC_GROUP_PRECOMPUTE_MULT			 142#define EC_F_EC_GROUP_SET_CURVE_GFP			 109#define EC_F_EC_GROUP_SET_EXTRA_DATA			 110#define EC_F_EC_GROUP_SET_GENERATOR			 111#define EC_F_EC_POINTS_MAKE_AFFINE			 136#define EC_F_EC_POINTS_MUL				 138#define EC_F_EC_POINT_ADD				 112#define EC_F_EC_POINT_CMP				 113#define EC_F_EC_POINT_COPY				 114#define EC_F_EC_POINT_DBL				 115#define EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP	 116#define EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP	 117#define EC_F_EC_POINT_IS_AT_INFINITY			 118#define EC_F_EC_POINT_IS_ON_CURVE			 119#define EC_F_EC_POINT_MAKE_AFFINE			 120#define EC_F_EC_POINT_NEW				 121#define EC_F_EC_POINT_OCT2POINT				 122#define EC_F_EC_POINT_POINT2OCT				 123#define EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP	 124#define EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP	 125#define EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP	 126#define EC_F_EC_POINT_SET_TO_INFINITY			 127#define EC_F_GFP_MONT_GROUP_SET_CURVE_GFP		 135/* Reason codes. */#define EC_R_BUFFER_TOO_SMALL				 100#define EC_R_INCOMPATIBLE_OBJECTS			 101#define EC_R_INVALID_ARGUMENT				 112#define EC_R_INVALID_COMPRESSED_POINT			 110#define EC_R_INVALID_COMPRESSION_BIT			 109#define EC_R_INVALID_ENCODING				 102#define EC_R_INVALID_FIELD				 103#define EC_R_INVALID_FORM				 104#define EC_R_NOT_INITIALIZED				 111#define EC_R_POINT_AT_INFINITY				 106#define EC_R_POINT_IS_NOT_ON_CURVE			 107#define EC_R_SLOT_FULL					 108#define EC_R_UNDEFINED_GENERATOR			 113#define EC_R_UNKNOWN_ORDER				 114#ifdef  __cplusplus}#endif#endif