/* 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 #include #ifdef __cplusplus extern "C" { #endif typedef 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 0 const EC_METHOD *EC_GFp_recp_method(void); /* TODO */ const EC_METHOD *EC_GFp_nist_method(void); /* TODO */ #endif EC_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_EXTRA_DATA 107 #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_NO_SUCH_EXTRA_DATA 105 #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