| /* 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 __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_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 |