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196 lines
7.0 KiB
C
196 lines
7.0 KiB
C
/* crypto/ec/ec.h */
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/* ====================================================================
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* Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@openssl.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#ifndef HEADER_EC_H
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#define HEADER_EC_H
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#include <openssl/bn.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef enum {
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/* values as defined in X9.62 (ECDSA) and elsewhere */
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POINT_CONVERSION_COMPRESSED = 2,
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POINT_CONVERSION_UNCOMPRESSED = 4,
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POINT_CONVERSION_HYBRID = 6
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} point_conversion_form_t;
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typedef struct ec_method_st EC_METHOD;
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typedef struct ec_group_st
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/*
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EC_METHOD *meth;
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-- field definition
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-- curve coefficients
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-- optional generator with associated information (order, cofactor)
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-- optional Lim/Lee precomputation table
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*/
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EC_GROUP;
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typedef struct ec_point_st EC_POINT;
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/* EC_METHODs for curves over GF(p).
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* EC_GFp_simple_method provides the basis for the optimized methods.
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*/
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const EC_METHOD *EC_GFp_simple_method(void);
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const EC_METHOD *EC_GFp_mont_method(void);
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const EC_METHOD *EC_GFp_recp_method(void);
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const EC_METHOD *EC_GFp_nist_method(void);
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EC_GROUP *EC_GROUP_new(const EC_METHOD *);
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/* We don't have types for field specifications and field elements in general.
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* Otherwise we would declare
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* int EC_GROUP_set_curve(EC_GROUP *, .....);
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*/
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int EC_GROUP_set_curve_GFp(EC_GROUP *, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *);
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void EC_GROUP_free(EC_GROUP *);
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void EC_GROUP_clear_free(EC_GROUP *);
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int EC_GROUP_copy(EC_GROUP *, const EC_GROUP*);
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/* EC_GROUP_new_GFp() calls EC_GROUP_new() and EC_GROUP_set_GFp()
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* after choosing an appropriate EC_METHOD */
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EC_GROUP *EC_GROUP_new_curve_GFp(const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *);
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int EC_GROUP_set_generator(EC_GROUP *, const EC_POINT *generator, const BIGNUM *order, const BIGNUM *cofactor);
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/* TODO: 'set' and 'get' functions for EC_GROUPs */
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EC_POINT *EC_POINT_new(const EC_GROUP *);
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void EC_POINT_free(EC_POINT *);
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void EC_POINT_clear_free(EC_POINT *);
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int EC_POINT_copy(EC_POINT *, const EC_POINT *);
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int EC_POINT_set_to_infinity(const EC_GROUP *, EC_POINT *);
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int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *, EC_POINT *,
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const BIGNUM *x, const BIGNUM *y, BN_CTX *);
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int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *, const EC_POINT *,
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BIGNUM *x, BIGNUM *y, BN_CTX *);
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/* TODO: other 'set' and 'get' functions for EC_POINTs */
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size_t EC_POINT_point2oct(const EC_GROUP *, const EC_POINT *, point_conversion_form_t form,
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unsigned char *buf, size_t len, BN_CTX *);
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int EC_POINT_oct2point(const EC_GROUP *, EC_POINT *,
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const unsigned char *buf, size_t len, BN_CTX *);
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int EC_POINT_add(const EC_GROUP *, EC_POINT *r, const EC_POINT *a, const EC_POINT *b, BN_CTX *);
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int EC_POINT_dbl(const EC_GROUP *, EC_POINT *r, const EC_POINT *a, BN_CTX *);
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int EC_POINT_is_at_infinity(const EC_GROUP *, const EC_POINT *);
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int EC_POINT_is_on_curve(const EC_GROUP *, const EC_POINT *, BN_CTX *);
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int EC_POINT_make_affine(const EC_GROUP *, EC_POINT *, BN_CTX *);
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/* TODO: scalar multiplication */
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/* BEGIN ERROR CODES */
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/* The following lines are auto generated by the script mkerr.pl. Any changes
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* made after this point may be overwritten when the script is next run.
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*/
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/* Error codes for the EC functions. */
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/* Function codes. */
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#define EC_F_EC_GFP_SIMPLE_GROUP_SET_GENERATOR 100
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#define EC_F_EC_GFP_SIMPLE_MAKE_AFFINE 101
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#define EC_F_EC_GFP_SIMPLE_OCT2POINT 102
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#define EC_F_EC_GFP_SIMPLE_POINT2OCT 103
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#define EC_F_EC_GFP_SIMPLE_POINT_GET_AFFINE_COORDINATES_GFP 104
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#define EC_F_EC_GROUP_COPY 105
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#define EC_F_EC_GROUP_GET_EXTRA_DATA 106
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#define EC_F_EC_GROUP_NEW 107
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#define EC_F_EC_GROUP_SET_CURVE_GFP 108
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#define EC_F_EC_GROUP_SET_EXTRA_DATA 109
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#define EC_F_EC_GROUP_SET_GENERATOR 110
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#define EC_F_EC_POINT_ADD 111
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#define EC_F_EC_POINT_COPY 112
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#define EC_F_EC_POINT_DBL 113
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#define EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP 114
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#define EC_F_EC_POINT_IS_AT_INFINITY 115
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#define EC_F_EC_POINT_IS_ON_CURVE 116
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#define EC_F_EC_POINT_MAKE_AFFINE 117
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#define EC_F_EC_POINT_NEW 118
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#define EC_F_EC_POINT_OCT2POINT 119
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#define EC_F_EC_POINT_POINT2OCT 120
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#define EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP 121
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#define EC_F_EC_POINT_SET_TO_INFINITY 122
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/* Reason codes. */
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#define EC_R_BUFFER_TOO_SMALL 100
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#define EC_R_INCOMPATIBLE_OBJECTS 101
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#define EC_R_INVALID_ENCODING 102
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#define EC_R_INVALID_FORM 103
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#define EC_R_NO_SUCH_EXTRA_DATA 104
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#define EC_R_POINT_AT_INFINITY 105
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#define EC_R_POINT_IS_NOT_ON_CURVE 106
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#define EC_R_SLOT_FULL 107
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#ifdef __cplusplus
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}
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#endif
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#endif
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