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/*
* Copyright 2002-2020 The OpenSSL Project Authors. All Rights Reserved.
* Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#ifndef HEADER_EC_H
# define HEADER_EC_H
# include <openssl/opensslconf.h>
# ifndef OPENSSL_NO_EC
# include <openssl/asn1.h>
# include <openssl/symhacks.h>
# if OPENSSL_API_COMPAT < 0x10100000L
# include <openssl/bn.h>
# endif
# include <openssl/ecerr.h>
# ifdef __cplusplus
extern "C" {
# endif
# ifndef OPENSSL_ECC_MAX_FIELD_BITS
# define OPENSSL_ECC_MAX_FIELD_BITS 661
# endif
/** Enum for the point conversion form as defined in X9.62 (ECDSA)
* for the encoding of a elliptic curve point (x,y) */
typedef enum {
/** the point is encoded as z||x, where the octet z specifies
* which solution of the quadratic equation y is */
POINT_CONVERSION_COMPRESSED = 2,
/** the point is encoded as z||x||y, where z is the octet 0x04 */
POINT_CONVERSION_UNCOMPRESSED = 4,
/** the point is encoded as z||x||y, where the octet z specifies
* which solution of the quadratic equation y is */
POINT_CONVERSION_HYBRID = 6
} point_conversion_form_t;
typedef struct ec_method_st EC_METHOD;
typedef struct ec_group_st EC_GROUP;
typedef struct ec_point_st EC_POINT;
typedef struct ecpk_parameters_st ECPKPARAMETERS;
typedef struct ec_parameters_st ECPARAMETERS;
/********************************************************************/
/* EC_METHODs for curves over GF(p) */
/********************************************************************/
/** Returns the basic GFp ec methods which provides the basis for the
* optimized methods.
* \return EC_METHOD object
*/
const EC_METHOD *EC_GFp_simple_method(void);
/** Returns GFp methods using montgomery multiplication.
* \return EC_METHOD object
*/
const EC_METHOD *EC_GFp_mont_method(void);
/** Returns GFp methods using optimized methods for NIST recommended curves
* \return EC_METHOD object
*/
const EC_METHOD *EC_GFp_nist_method(void);
# ifndef OPENSSL_NO_EC_NISTP_64_GCC_128
/** Returns 64-bit optimized methods for nistp224
* \return EC_METHOD object
*/
const EC_METHOD *EC_GFp_nistp224_method(void);
/** Returns 64-bit optimized methods for nistp256
* \return EC_METHOD object
*/
const EC_METHOD *EC_GFp_nistp256_method(void);
/** Returns 64-bit optimized methods for nistp521
* \return EC_METHOD object
*/
const EC_METHOD *EC_GFp_nistp521_method(void);
# endif
# ifndef OPENSSL_NO_EC2M
/********************************************************************/
/* EC_METHOD for curves over GF(2^m) */
/********************************************************************/
/** Returns the basic GF2m ec method
* \return EC_METHOD object
*/
const EC_METHOD *EC_GF2m_simple_method(void);
# endif
/********************************************************************/
/* EC_GROUP functions */
/********************************************************************/
/** Creates a new EC_GROUP object
* \param meth EC_METHOD to use
* \return newly created EC_GROUP object or NULL in case of an error.
*/
EC_GROUP *EC_GROUP_new(const EC_METHOD *meth);
/** Frees a EC_GROUP object
* \param group EC_GROUP object to be freed.
*/
void EC_GROUP_free(EC_GROUP *group);
/** Clears and frees a EC_GROUP object
* \param group EC_GROUP object to be cleared and freed.
*/
void EC_GROUP_clear_free(EC_GROUP *group);
/** Copies EC_GROUP objects. Note: both EC_GROUPs must use the same EC_METHOD.
* \param dst destination EC_GROUP object
* \param src source EC_GROUP object
* \return 1 on success and 0 if an error occurred.
*/
int EC_GROUP_copy(EC_GROUP *dst, const EC_GROUP *src);
/** Creates a new EC_GROUP object and copies the copies the content
* form src to the newly created EC_KEY object
* \param src source EC_GROUP object
* \return newly created EC_GROUP object or NULL in case of an error.
*/
EC_GROUP *EC_GROUP_dup(const EC_GROUP *src);
/** Returns the EC_METHOD of the EC_GROUP object.
* \param group EC_GROUP object
* \return EC_METHOD used in this EC_GROUP object.
*/
const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group);
/** Returns the field type of the EC_METHOD.
* \param meth EC_METHOD object
* \return NID of the underlying field type OID.
*/
int EC_METHOD_get_field_type(const EC_METHOD *meth);
/** Sets the generator and its order/cofactor of a EC_GROUP object.
* \param group EC_GROUP object
* \param generator EC_POINT object with the generator.
* \param order the order of the group generated by the generator.
* \param cofactor the index of the sub-group generated by the generator
* in the group of all points on the elliptic curve.
* \return 1 on success and 0 if an error occurred
*/
int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator,
const BIGNUM *order, const BIGNUM *cofactor);
/** Returns the generator of a EC_GROUP object.
* \param group EC_GROUP object
* \return the currently used generator (possibly NULL).
*/
const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group);
/** Returns the montgomery data for order(Generator)
* \param group EC_GROUP object
* \return the currently used montgomery data (possibly NULL).
*/
BN_MONT_CTX *EC_GROUP_get_mont_data(const EC_GROUP *group);
/** Gets the order of a EC_GROUP
* \param group EC_GROUP object
* \param order BIGNUM to which the order is copied
* \param ctx unused
* \return 1 on success and 0 if an error occurred
*/
int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx);
/** Gets the order of an EC_GROUP
* \param group EC_GROUP object
* \return the group order
*/
const BIGNUM *EC_GROUP_get0_order(const EC_GROUP *group);
/** Gets the number of bits of the order of an EC_GROUP
* \param group EC_GROUP object
* \return number of bits of group order.
*/
int EC_GROUP_order_bits(const EC_GROUP *group);
/** Gets the cofactor of a EC_GROUP
* \param group EC_GROUP object
* \param cofactor BIGNUM to which the cofactor is copied
* \param ctx unused
* \return 1 on success and 0 if an error occurred
*/
int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor,
BN_CTX *ctx);
/** Gets the cofactor of an EC_GROUP
* \param group EC_GROUP object
* \return the group cofactor
*/
const BIGNUM *EC_GROUP_get0_cofactor(const EC_GROUP *group);
/** Sets the name of a EC_GROUP object
* \param group EC_GROUP object
* \param nid NID of the curve name OID
*/
void EC_GROUP_set_curve_name(EC_GROUP *group, int nid);
/** Returns the curve name of a EC_GROUP object
* \param group EC_GROUP object
* \return NID of the curve name OID or 0 if not set.
*/
int EC_GROUP_get_curve_name(const EC_GROUP *group);
void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag);
int EC_GROUP_get_asn1_flag(const EC_GROUP *group);
void EC_GROUP_set_point_conversion_form(EC_GROUP *group,
point_conversion_form_t form);
point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP *);
unsigned char *EC_GROUP_get0_seed(const EC_GROUP *x);
size_t EC_GROUP_get_seed_len(const EC_GROUP *);
size_t EC_GROUP_set_seed(EC_GROUP *, const unsigned char *, size_t len);
/** Sets the parameters of a ec curve defined by y^2 = x^3 + a*x + b (for GFp)
* or y^2 + x*y = x^3 + a*x^2 + b (for GF2m)
* \param group EC_GROUP object
* \param p BIGNUM with the prime number (GFp) or the polynomial
* defining the underlying field (GF2m)
* \param a BIGNUM with parameter a of the equation
* \param b BIGNUM with parameter b of the equation
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
int EC_GROUP_set_curve(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a,
const BIGNUM *b, BN_CTX *ctx);
/** Gets the parameters of the ec curve defined by y^2 = x^3 + a*x + b (for GFp)
* or y^2 + x*y = x^3 + a*x^2 + b (for GF2m)
* \param group EC_GROUP object
* \param p BIGNUM with the prime number (GFp) or the polynomial
* defining the underlying field (GF2m)
* \param a BIGNUM for parameter a of the equation
* \param b BIGNUM for parameter b of the equation
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
int EC_GROUP_get_curve(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b,
BN_CTX *ctx);
/** Sets the parameters of an ec curve. Synonym for EC_GROUP_set_curve
* \param group EC_GROUP object
* \param p BIGNUM with the prime number (GFp) or the polynomial
* defining the underlying field (GF2m)
* \param a BIGNUM with parameter a of the equation
* \param b BIGNUM with parameter b of the equation
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
DEPRECATEDIN_1_2_0(int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p,
const BIGNUM *a, const BIGNUM *b,
BN_CTX *ctx))
/** Gets the parameters of an ec curve. Synonym for EC_GROUP_get_curve
* \param group EC_GROUP object
* \param p BIGNUM with the prime number (GFp) or the polynomial
* defining the underlying field (GF2m)
* \param a BIGNUM for parameter a of the equation
* \param b BIGNUM for parameter b of the equation
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
DEPRECATEDIN_1_2_0(int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p,
BIGNUM *a, BIGNUM *b,
BN_CTX *ctx))
# ifndef OPENSSL_NO_EC2M
/** Sets the parameter of an ec curve. Synonym for EC_GROUP_set_curve
* \param group EC_GROUP object
* \param p BIGNUM with the prime number (GFp) or the polynomial
* defining the underlying field (GF2m)
* \param a BIGNUM with parameter a of the equation
* \param b BIGNUM with parameter b of the equation
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
DEPRECATEDIN_1_2_0(int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p,
const BIGNUM *a, const BIGNUM *b,
BN_CTX *ctx))
/** Gets the parameters of an ec curve. Synonym for EC_GROUP_get_curve
* \param group EC_GROUP object
* \param p BIGNUM with the prime number (GFp) or the polynomial
* defining the underlying field (GF2m)
* \param a BIGNUM for parameter a of the equation
* \param b BIGNUM for parameter b of the equation
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
DEPRECATEDIN_1_2_0(int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p,
BIGNUM *a, BIGNUM *b,
BN_CTX *ctx))
# endif
/** Returns the number of bits needed to represent a field element
* \param group EC_GROUP object
* \return number of bits needed to represent a field element
*/
int EC_GROUP_get_degree(const EC_GROUP *group);
/** Checks whether the parameter in the EC_GROUP define a valid ec group
* \param group EC_GROUP object
* \param ctx BN_CTX object (optional)
* \return 1 if group is a valid ec group and 0 otherwise
*/
int EC_GROUP_check(const EC_GROUP *group, BN_CTX *ctx);
/** Checks whether the discriminant of the elliptic curve is zero or not
* \param group EC_GROUP object
* \param ctx BN_CTX object (optional)
* \return 1 if the discriminant is not zero and 0 otherwise
*/
int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx);
/** Compares two EC_GROUP objects
* \param a first EC_GROUP object
* \param b second EC_GROUP object
* \param ctx BN_CTX object (optional)
* \return 0 if the groups are equal, 1 if not, or -1 on error
*/
int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx);
/*
* EC_GROUP_new_GF*() calls EC_GROUP_new() and EC_GROUP_set_GF*() after
* choosing an appropriate EC_METHOD
*/
/** Creates a new EC_GROUP object with the specified parameters defined
* over GFp (defined by the equation y^2 = x^3 + a*x + b)
* \param p BIGNUM with the prime number
* \param a BIGNUM with the parameter a of the equation
* \param b BIGNUM with the parameter b of the equation
* \param ctx BN_CTX object (optional)
* \return newly created EC_GROUP object with the specified parameters
*/
EC_GROUP *EC_GROUP_new_curve_GFp(const BIGNUM *p, const BIGNUM *a,
const BIGNUM *b, BN_CTX *ctx);
# ifndef OPENSSL_NO_EC2M
/** Creates a new EC_GROUP object with the specified parameters defined
* over GF2m (defined by the equation y^2 + x*y = x^3 + a*x^2 + b)
* \param p BIGNUM with the polynomial defining the underlying field
* \param a BIGNUM with the parameter a of the equation
* \param b BIGNUM with the parameter b of the equation
* \param ctx BN_CTX object (optional)
* \return newly created EC_GROUP object with the specified parameters
*/
EC_GROUP *EC_GROUP_new_curve_GF2m(const BIGNUM *p, const BIGNUM *a,
const BIGNUM *b, BN_CTX *ctx);
# endif
/** Creates a EC_GROUP object with a curve specified by a NID
* \param nid NID of the OID of the curve name
* \return newly created EC_GROUP object with specified curve or NULL
* if an error occurred
*/
EC_GROUP *EC_GROUP_new_by_curve_name(int nid);
/** Creates a new EC_GROUP object from an ECPARAMETERS object
* \param params pointer to the ECPARAMETERS object
* \return newly created EC_GROUP object with specified curve or NULL
* if an error occurred
*/
EC_GROUP *EC_GROUP_new_from_ecparameters(const ECPARAMETERS *params);
/** Creates an ECPARAMETERS object for the given EC_GROUP object.
* \param group pointer to the EC_GROUP object
* \param params pointer to an existing ECPARAMETERS object or NULL
* \return pointer to the new ECPARAMETERS object or NULL
* if an error occurred.
*/
ECPARAMETERS *EC_GROUP_get_ecparameters(const EC_GROUP *group,
ECPARAMETERS *params);
/** Creates a new EC_GROUP object from an ECPKPARAMETERS object
* \param params pointer to an existing ECPKPARAMETERS object, or NULL
* \return newly created EC_GROUP object with specified curve, or NULL
* if an error occurred
*/
EC_GROUP *EC_GROUP_new_from_ecpkparameters(const ECPKPARAMETERS *params);
/** Creates an ECPKPARAMETERS object for the given EC_GROUP object.
* \param group pointer to the EC_GROUP object
* \param params pointer to an existing ECPKPARAMETERS object or NULL
* \return pointer to the new ECPKPARAMETERS object or NULL
* if an error occurred.
*/
ECPKPARAMETERS *EC_GROUP_get_ecpkparameters(const EC_GROUP *group,
ECPKPARAMETERS *params);
/********************************************************************/
/* handling of internal curves */
/********************************************************************/
typedef struct {
int nid;
const char *comment;
} EC_builtin_curve;
/*
* EC_builtin_curves(EC_builtin_curve *r, size_t size) returns number of all
* available curves or zero if a error occurred. In case r is not zero,
* nitems EC_builtin_curve structures are filled with the data of the first
* nitems internal groups
*/
size_t EC_get_builtin_curves(EC_builtin_curve *r, size_t nitems);
const char *EC_curve_nid2nist(int nid);
int EC_curve_nist2nid(const char *name);
/********************************************************************/
/* EC_POINT functions */
/********************************************************************/
/** Creates a new EC_POINT object for the specified EC_GROUP
* \param group EC_GROUP the underlying EC_GROUP object
* \return newly created EC_POINT object or NULL if an error occurred
*/
EC_POINT *EC_POINT_new(const EC_GROUP *group);
/** Frees a EC_POINT object
* \param point EC_POINT object to be freed
*/
void EC_POINT_free(EC_POINT *point);
/** Clears and frees a EC_POINT object
* \param point EC_POINT object to be cleared and freed
*/
void EC_POINT_clear_free(EC_POINT *point);
/** Copies EC_POINT object
* \param dst destination EC_POINT object
* \param src source EC_POINT object
* \return 1 on success and 0 if an error occurred
*/
int EC_POINT_copy(EC_POINT *dst, const EC_POINT *src);
/** Creates a new EC_POINT object and copies the content of the supplied
* EC_POINT
* \param src source EC_POINT object
* \param group underlying the EC_GROUP object
* \return newly created EC_POINT object or NULL if an error occurred
*/
EC_POINT *EC_POINT_dup(const EC_POINT *src, const EC_GROUP *group);
/** Returns the EC_METHOD used in EC_POINT object
* \param point EC_POINT object
* \return the EC_METHOD used
*/
const EC_METHOD *EC_POINT_method_of(const EC_POINT *point);
/** Sets a point to infinity (neutral element)
* \param group underlying EC_GROUP object
* \param point EC_POINT to set to infinity
* \return 1 on success and 0 if an error occurred
*/
int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point);
/** Sets the jacobian projective coordinates of a EC_POINT over GFp
* \param group underlying EC_GROUP object
* \param p EC_POINT object
* \param x BIGNUM with the x-coordinate
* \param y BIGNUM with the y-coordinate
* \param z BIGNUM with the z-coordinate
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group,
EC_POINT *p, const BIGNUM *x,
const BIGNUM *y, const BIGNUM *z,
BN_CTX *ctx);
/** Gets the jacobian projective coordinates of a EC_POINT over GFp
* \param group underlying EC_GROUP object
* \param p EC_POINT object
* \param x BIGNUM for the x-coordinate
* \param y BIGNUM for the y-coordinate
* \param z BIGNUM for the z-coordinate
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group,
const EC_POINT *p, BIGNUM *x,
BIGNUM *y, BIGNUM *z,
BN_CTX *ctx);
/** Sets the affine coordinates of an EC_POINT
* \param group underlying EC_GROUP object
* \param p EC_POINT object
* \param x BIGNUM with the x-coordinate
* \param y BIGNUM with the y-coordinate
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
int EC_POINT_set_affine_coordinates(const EC_GROUP *group, EC_POINT *p,
const BIGNUM *x, const BIGNUM *y,
BN_CTX *ctx);
/** Gets the affine coordinates of an EC_POINT.
* \param group underlying EC_GROUP object
* \param p EC_POINT object
* \param x BIGNUM for the x-coordinate
* \param y BIGNUM for the y-coordinate
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
int EC_POINT_get_affine_coordinates(const EC_GROUP *group, const EC_POINT *p,
BIGNUM *x, BIGNUM *y, BN_CTX *ctx);
/** Sets the affine coordinates of an EC_POINT. A synonym of
* EC_POINT_set_affine_coordinates
* \param group underlying EC_GROUP object
* \param p EC_POINT object
* \param x BIGNUM with the x-coordinate
* \param y BIGNUM with the y-coordinate
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
DEPRECATEDIN_1_2_0(int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group,
EC_POINT *p,
const BIGNUM *x,
const BIGNUM *y,
BN_CTX *ctx))
/** Gets the affine coordinates of an EC_POINT. A synonym of
* EC_POINT_get_affine_coordinates
* \param group underlying EC_GROUP object
* \param p EC_POINT object
* \param x BIGNUM for the x-coordinate
* \param y BIGNUM for the y-coordinate
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
DEPRECATEDIN_1_2_0(int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group,
const EC_POINT *p,
BIGNUM *x,
BIGNUM *y,
BN_CTX *ctx))
/** Sets the x9.62 compressed coordinates of a EC_POINT
* \param group underlying EC_GROUP object
* \param p EC_POINT object
* \param x BIGNUM with x-coordinate
* \param y_bit integer with the y-Bit (either 0 or 1)
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
int EC_POINT_set_compressed_coordinates(const EC_GROUP *group, EC_POINT *p,
const BIGNUM *x, int y_bit,
BN_CTX *ctx);
/** Sets the x9.62 compressed coordinates of a EC_POINT. A synonym of
* EC_POINT_set_compressed_coordinates
* \param group underlying EC_GROUP object
* \param p EC_POINT object
* \param x BIGNUM with x-coordinate
* \param y_bit integer with the y-Bit (either 0 or 1)
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
DEPRECATEDIN_1_2_0(int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group,
EC_POINT *p,
const BIGNUM *x,
int y_bit,
BN_CTX *ctx))
# ifndef OPENSSL_NO_EC2M
/** Sets the affine coordinates of an EC_POINT. A synonym of
* EC_POINT_set_affine_coordinates
* \param group underlying EC_GROUP object
* \param p EC_POINT object
* \param x BIGNUM with the x-coordinate
* \param y BIGNUM with the y-coordinate
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
DEPRECATEDIN_1_2_0(int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group,
EC_POINT *p,
const BIGNUM *x,
const BIGNUM *y,
BN_CTX *ctx))
/** Gets the affine coordinates of an EC_POINT. A synonym of
* EC_POINT_get_affine_coordinates
* \param group underlying EC_GROUP object
* \param p EC_POINT object
* \param x BIGNUM for the x-coordinate
* \param y BIGNUM for the y-coordinate
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
DEPRECATEDIN_1_2_0(int EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *group,
const EC_POINT *p,
BIGNUM *x,
BIGNUM *y,
BN_CTX *ctx))
/** Sets the x9.62 compressed coordinates of a EC_POINT. A synonym of
* EC_POINT_set_compressed_coordinates
* \param group underlying EC_GROUP object
* \param p EC_POINT object
* \param x BIGNUM with x-coordinate
* \param y_bit integer with the y-Bit (either 0 or 1)
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
DEPRECATEDIN_1_2_0(int EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *group,
EC_POINT *p,
const BIGNUM *x,
int y_bit,
BN_CTX *ctx))
# endif
/** Encodes a EC_POINT object to a octet string
* \param group underlying EC_GROUP object
* \param p EC_POINT object
* \param form point conversion form
* \param buf memory buffer for the result. If NULL the function returns
* required buffer size.
* \param len length of the memory buffer
* \param ctx BN_CTX object (optional)
* \return the length of the encoded octet string or 0 if an error occurred
*/
size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *p,
point_conversion_form_t form,
unsigned char *buf, size_t len, BN_CTX *ctx);
/** Decodes a EC_POINT from a octet string
* \param group underlying EC_GROUP object
* \param p EC_POINT object
* \param buf memory buffer with the encoded ec point
* \param len length of the encoded ec point
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *p,
const unsigned char *buf, size_t len, BN_CTX *ctx);
/** Encodes an EC_POINT object to an allocated octet string
* \param group underlying EC_GROUP object
* \param point EC_POINT object
* \param form point conversion form
* \param pbuf returns pointer to allocated buffer
* \param ctx BN_CTX object (optional)
* \return the length of the encoded octet string or 0 if an error occurred
*/
size_t EC_POINT_point2buf(const EC_GROUP *group, const EC_POINT *point,
point_conversion_form_t form,
unsigned char **pbuf, BN_CTX *ctx);
/* other interfaces to point2oct/oct2point: */
BIGNUM *EC_POINT_point2bn(const EC_GROUP *, const EC_POINT *,
point_conversion_form_t form, BIGNUM *, BN_CTX *);
EC_POINT *EC_POINT_bn2point(const EC_GROUP *, const BIGNUM *,
EC_POINT *, BN_CTX *);
char *EC_POINT_point2hex(const EC_GROUP *, const EC_POINT *,
point_conversion_form_t form, BN_CTX *);
EC_POINT *EC_POINT_hex2point(const EC_GROUP *, const char *,
EC_POINT *, BN_CTX *);
/********************************************************************/
/* functions for doing EC_POINT arithmetic */
/********************************************************************/
/** Computes the sum of two EC_POINT
* \param group underlying EC_GROUP object
* \param r EC_POINT object for the result (r = a + b)
* \param a EC_POINT object with the first summand
* \param b EC_POINT object with the second summand
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a,
const EC_POINT *b, BN_CTX *ctx);
/** Computes the double of a EC_POINT
* \param group underlying EC_GROUP object
* \param r EC_POINT object for the result (r = 2 * a)
* \param a EC_POINT object
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a,
BN_CTX *ctx);
/** Computes the inverse of a EC_POINT
* \param group underlying EC_GROUP object
* \param a EC_POINT object to be inverted (it's used for the result as well)
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx);
/** Checks whether the point is the neutral element of the group
* \param group the underlying EC_GROUP object
* \param p EC_POINT object
* \return 1 if the point is the neutral element and 0 otherwise
*/
int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *p);
/** Checks whether the point is on the curve
* \param group underlying EC_GROUP object
* \param point EC_POINT object to check
* \param ctx BN_CTX object (optional)
* \return 1 if the point is on the curve, 0 if not, or -1 on error
*/
int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point,
BN_CTX *ctx);
/** Compares two EC_POINTs
* \param group underlying EC_GROUP object
* \param a first EC_POINT object
* \param b second EC_POINT object
* \param ctx BN_CTX object (optional)
* \return 1 if the points are not equal, 0 if they are, or -1 on error
*/
int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b,
BN_CTX *ctx);
int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx);
int EC_POINTs_make_affine(const EC_GROUP *group, size_t num,
EC_POINT *points[], BN_CTX *ctx);
/** Computes r = generator * n + sum_{i=0}^{num-1} p[i] * m[i]
* \param group underlying EC_GROUP object
* \param r EC_POINT object for the result
* \param n BIGNUM with the multiplier for the group generator (optional)
* \param num number further summands
* \param p array of size num of EC_POINT objects
* \param m array of size num of BIGNUM objects
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *n,
size_t num, const EC_POINT *p[], const BIGNUM *m[],
BN_CTX *ctx);
/** Computes r = generator * n + q * m
* \param group underlying EC_GROUP object
* \param r EC_POINT object for the result
* \param n BIGNUM with the multiplier for the group generator (optional)
* \param q EC_POINT object with the first factor of the second summand
* \param m BIGNUM with the second factor of the second summand
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *n,
const EC_POINT *q, const BIGNUM *m, BN_CTX *ctx);
/** Stores multiples of generator for faster point multiplication
* \param group EC_GROUP object
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx);
/** Reports whether a precomputation has been done
* \param group EC_GROUP object
* \return 1 if a pre-computation has been done and 0 otherwise
*/
int EC_GROUP_have_precompute_mult(const EC_GROUP *group);
/********************************************************************/
/* ASN1 stuff */
/********************************************************************/
DECLARE_ASN1_ITEM(ECPKPARAMETERS)
DECLARE_ASN1_ALLOC_FUNCTIONS(ECPKPARAMETERS)
DECLARE_ASN1_ITEM(ECPARAMETERS)
DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
/*
* EC_GROUP_get_basis_type() returns the NID of the basis type used to
* represent the field elements
*/
int EC_GROUP_get_basis_type(const EC_GROUP *);
# ifndef OPENSSL_NO_EC2M
int EC_GROUP_get_trinomial_basis(const EC_GROUP *, unsigned int *k);
int EC_GROUP_get_pentanomial_basis(const EC_GROUP *, unsigned int *k1,
unsigned int *k2, unsigned int *k3);
# endif
# define OPENSSL_EC_EXPLICIT_CURVE 0x000
# define OPENSSL_EC_NAMED_CURVE 0x001
EC_GROUP *d2i_ECPKParameters(EC_GROUP **, const unsigned char **in, long len);
int i2d_ECPKParameters(const EC_GROUP *, unsigned char **out);
# define d2i_ECPKParameters_bio(bp,x) ASN1_d2i_bio_of(EC_GROUP,NULL,d2i_ECPKParameters,bp,x)
# define i2d_ECPKParameters_bio(bp,x) ASN1_i2d_bio_of_const(EC_GROUP,i2d_ECPKParameters,bp,x)
# define d2i_ECPKParameters_fp(fp,x) (EC_GROUP *)ASN1_d2i_fp(NULL, \
(char *(*)())d2i_ECPKParameters,(fp),(unsigned char **)(x))
# define i2d_ECPKParameters_fp(fp,x) ASN1_i2d_fp(i2d_ECPKParameters,(fp), \
(unsigned char *)(x))
int ECPKParameters_print(BIO *bp, const EC_GROUP *x, int off);
# ifndef OPENSSL_NO_STDIO
int ECPKParameters_print_fp(FILE *fp, const EC_GROUP *x, int off);
# endif
/********************************************************************/
/* EC_KEY functions */
/********************************************************************/
/* some values for the encoding_flag */
# define EC_PKEY_NO_PARAMETERS 0x001
# define EC_PKEY_NO_PUBKEY 0x002
/* some values for the flags field */
# define EC_FLAG_NON_FIPS_ALLOW 0x1
# define EC_FLAG_FIPS_CHECKED 0x2
# define EC_FLAG_COFACTOR_ECDH 0x1000
/** Creates a new EC_KEY object.
* \return EC_KEY object or NULL if an error occurred.
*/
EC_KEY *EC_KEY_new(void);
int EC_KEY_get_flags(const EC_KEY *key);
void EC_KEY_set_flags(EC_KEY *key, int flags);
void EC_KEY_clear_flags(EC_KEY *key, int flags);
int EC_KEY_decoded_from_explicit_params(const EC_KEY *key);
/** Creates a new EC_KEY object using a named curve as underlying
* EC_GROUP object.
* \param nid NID of the named curve.
* \return EC_KEY object or NULL if an error occurred.
*/
EC_KEY *EC_KEY_new_by_curve_name(int nid);
/** Frees a EC_KEY object.
* \param key EC_KEY object to be freed.
*/
void EC_KEY_free(EC_KEY *key);
/** Copies a EC_KEY object.
* \param dst destination EC_KEY object
* \param src src EC_KEY object
* \return dst or NULL if an error occurred.
*/
EC_KEY *EC_KEY_copy(EC_KEY *dst, const EC_KEY *src);
/** Creates a new EC_KEY object and copies the content from src to it.
* \param src the source EC_KEY object
* \return newly created EC_KEY object or NULL if an error occurred.
*/
EC_KEY *EC_KEY_dup(const EC_KEY *src);
/** Increases the internal reference count of a EC_KEY object.
* \param key EC_KEY object
* \return 1 on success and 0 if an error occurred.
*/
int EC_KEY_up_ref(EC_KEY *key);
/** Returns the ENGINE object of a EC_KEY object
* \param eckey EC_KEY object
* \return the ENGINE object (possibly NULL).
*/
ENGINE *EC_KEY_get0_engine(const EC_KEY *eckey);
/** Returns the EC_GROUP object of a EC_KEY object
* \param key EC_KEY object
* \return the EC_GROUP object (possibly NULL).
*/
const EC_GROUP *EC_KEY_get0_group(const EC_KEY *key);
/** Sets the EC_GROUP of a EC_KEY object.
* \param key EC_KEY object
* \param group EC_GROUP to use in the EC_KEY object (note: the EC_KEY
* object will use an own copy of the EC_GROUP).
* \return 1 on success and 0 if an error occurred.
*/
int EC_KEY_set_group(EC_KEY *key, const EC_GROUP *group);
/** Returns the private key of a EC_KEY object.
* \param key EC_KEY object
* \return a BIGNUM with the private key (possibly NULL).
*/
const BIGNUM *EC_KEY_get0_private_key(const EC_KEY *key);
/** Sets the private key of a EC_KEY object.
* \param key EC_KEY object
* \param prv BIGNUM with the private key (note: the EC_KEY object
* will use an own copy of the BIGNUM).
* \return 1 on success and 0 if an error occurred.
*/
int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *prv);
/** Returns the public key of a EC_KEY object.
* \param key the EC_KEY object
* \return a EC_POINT object with the public key (possibly NULL)
*/
const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *key);
/** Sets the public key of a EC_KEY object.
* \param key EC_KEY object
* \param pub EC_POINT object with the public key (note: the EC_KEY object
* will use an own copy of the EC_POINT object).
* \return 1 on success and 0 if an error occurred.
*/
int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub);
unsigned EC_KEY_get_enc_flags(const EC_KEY *key);
void EC_KEY_set_enc_flags(EC_KEY *eckey, unsigned int flags);
point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key);
void EC_KEY_set_conv_form(EC_KEY *eckey, point_conversion_form_t cform);
#define EC_KEY_get_ex_new_index(l, p, newf, dupf, freef) \
CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_EC_KEY, l, p, newf, dupf, freef)
int EC_KEY_set_ex_data(EC_KEY *key, int idx, void *arg);
void *EC_KEY_get_ex_data(const EC_KEY *key, int idx);
/* wrapper functions for the underlying EC_GROUP object */
void EC_KEY_set_asn1_flag(EC_KEY *eckey, int asn1_flag);
/** Creates a table of pre-computed multiples of the generator to
* accelerate further EC_KEY operations.
* \param key EC_KEY object
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred.
*/
int EC_KEY_precompute_mult(EC_KEY *key, BN_CTX *ctx);
/** Creates a new ec private (and optional a new public) key.
* \param key EC_KEY object
* \return 1 on success and 0 if an error occurred.
*/
int EC_KEY_generate_key(EC_KEY *key);
/** Verifies that a private and/or public key is valid.
* \param key the EC_KEY object
* \return 1 on success and 0 otherwise.
*/
int EC_KEY_check_key(const EC_KEY *key);
/** Indicates if an EC_KEY can be used for signing.
* \param eckey the EC_KEY object
* \return 1 if can can sign and 0 otherwise.
*/
int EC_KEY_can_sign(const EC_KEY *eckey);
/** Sets a public key from affine coordinates performing
* necessary NIST PKV tests.
* \param key the EC_KEY object
* \param x public key x coordinate
* \param y public key y coordinate
* \return 1 on success and 0 otherwise.
*/
int EC_KEY_set_public_key_affine_coordinates(EC_KEY *key, BIGNUM *x,
BIGNUM *y);
/** Encodes an EC_KEY public key to an allocated octet string
* \param key key to encode
* \param form point conversion form
* \param pbuf returns pointer to allocated buffer
* \param ctx BN_CTX object (optional)
* \return the length of the encoded octet string or 0 if an error occurred
*/
size_t EC_KEY_key2buf(const EC_KEY *key, point_conversion_form_t form,
unsigned char **pbuf, BN_CTX *ctx);
/** Decodes a EC_KEY public key from a octet string
* \param key key to decode
* \param buf memory buffer with the encoded ec point
* \param len length of the encoded ec point
* \param ctx BN_CTX object (optional)
* \return 1 on success and 0 if an error occurred
*/
int EC_KEY_oct2key(EC_KEY *key, const unsigned char *buf, size_t len,
BN_CTX *ctx);
/** Decodes an EC_KEY private key from an octet string
* \param key key to decode
* \param buf memory buffer with the encoded private key
* \param len length of the encoded key
* \return 1 on success and 0 if an error occurred
*/
int EC_KEY_oct2priv(EC_KEY *key, const unsigned char *buf, size_t len);
/** Encodes a EC_KEY private key to an octet string
* \param key key to encode
* \param buf memory buffer for the result. If NULL the function returns
* required buffer size.
* \param len length of the memory buffer
* \return the length of the encoded octet string or 0 if an error occurred
*/
size_t EC_KEY_priv2oct(const EC_KEY *key, unsigned char *buf, size_t len);
/** Encodes an EC_KEY private key to an allocated octet string
* \param eckey key to encode
* \param pbuf returns pointer to allocated buffer
* \return the length of the encoded octet string or 0 if an error occurred
*/
size_t EC_KEY_priv2buf(const EC_KEY *eckey, unsigned char **pbuf);
/********************************************************************/
/* de- and encoding functions for SEC1 ECPrivateKey */
/********************************************************************/
/** Decodes a private key from a memory buffer.
* \param key a pointer to a EC_KEY object which should be used (or NULL)
* \param in pointer to memory with the DER encoded private key
* \param len length of the DER encoded private key
* \return the decoded private key or NULL if an error occurred.
*/
EC_KEY *d2i_ECPrivateKey(EC_KEY **key, const unsigned char **in, long len);
/** Encodes a private key object and stores the result in a buffer.
* \param key the EC_KEY object to encode
* \param out the buffer for the result (if NULL the function returns number
* of bytes needed).
* \return 1 on success and 0 if an error occurred.
*/
int i2d_ECPrivateKey(EC_KEY *key, unsigned char **out);
/********************************************************************/
/* de- and encoding functions for EC parameters */
/********************************************************************/
/** Decodes ec parameter from a memory buffer.
* \param key a pointer to a EC_KEY object which should be used (or NULL)
* \param in pointer to memory with the DER encoded ec parameters
* \param len length of the DER encoded ec parameters
* \return a EC_KEY object with the decoded parameters or NULL if an error
* occurred.
*/
EC_KEY *d2i_ECParameters(EC_KEY **key, const unsigned char **in, long len);
/** Encodes ec parameter and stores the result in a buffer.
* \param key the EC_KEY object with ec parameters to encode
* \param out the buffer for the result (if NULL the function returns number
* of bytes needed).
* \return 1 on success and 0 if an error occurred.
*/
int i2d_ECParameters(EC_KEY *key, unsigned char **out);
/********************************************************************/
/* de- and encoding functions for EC public key */
/* (octet string, not DER -- hence 'o2i' and 'i2o') */
/********************************************************************/
/** Decodes a ec public key from a octet string.
* \param key a pointer to a EC_KEY object which should be used
* \param in memory buffer with the encoded public key
* \param len length of the encoded public key
* \return EC_KEY object with decoded public key or NULL if an error
* occurred.
*/
EC_KEY *o2i_ECPublicKey(EC_KEY **key, const unsigned char **in, long len);
/** Encodes a ec public key in an octet string.
* \param key the EC_KEY object with the public key
* \param out the buffer for the result (if NULL the function returns number
* of bytes needed).
* \return 1 on success and 0 if an error occurred
*/
int i2o_ECPublicKey(const EC_KEY *key, unsigned char **out);
/** Prints out the ec parameters on human readable form.
* \param bp BIO object to which the information is printed
* \param key EC_KEY object
* \return 1 on success and 0 if an error occurred
*/
int ECParameters_print(BIO *bp, const EC_KEY *key);
/** Prints out the contents of a EC_KEY object
* \param bp BIO object to which the information is printed
* \param key EC_KEY object
* \param off line offset
* \return 1 on success and 0 if an error occurred
*/
int EC_KEY_print(BIO *bp, const EC_KEY *key, int off);
# ifndef OPENSSL_NO_STDIO
/** Prints out the ec parameters on human readable form.
* \param fp file descriptor to which the information is printed
* \param key EC_KEY object
* \return 1 on success and 0 if an error occurred
*/
int ECParameters_print_fp(FILE *fp, const EC_KEY *key);
/** Prints out the contents of a EC_KEY object
* \param fp file descriptor to which the information is printed
* \param key EC_KEY object
* \param off line offset
* \return 1 on success and 0 if an error occurred
*/
int EC_KEY_print_fp(FILE *fp, const EC_KEY *key, int off);
# endif
const EC_KEY_METHOD *EC_KEY_OpenSSL(void);
const EC_KEY_METHOD *EC_KEY_get_default_method(void);
void EC_KEY_set_default_method(const EC_KEY_METHOD *meth);
const EC_KEY_METHOD *EC_KEY_get_method(const EC_KEY *key);
int EC_KEY_set_method(EC_KEY *key, const EC_KEY_METHOD *meth);
EC_KEY *EC_KEY_new_method(ENGINE *engine);
/** The old name for ecdh_KDF_X9_63
* The ECDH KDF specification has been mistakingly attributed to ANSI X9.62,
* it is actually specified in ANSI X9.63.
* This identifier is retained for backwards compatibility
*/
int ECDH_KDF_X9_62(unsigned char *out, size_t outlen,
const unsigned char *Z, size_t Zlen,
const unsigned char *sinfo, size_t sinfolen,
const EVP_MD *md);
int ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
const EC_KEY *ecdh,
void *(*KDF) (const void *in, size_t inlen,
void *out, size_t *outlen));
typedef struct ECDSA_SIG_st 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 a negative value
* on error
*/
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);
/** Accessor for r and s fields of ECDSA_SIG
* \param sig pointer to ECDSA_SIG structure
* \param pr pointer to BIGNUM pointer for r (may be NULL)
* \param ps pointer to BIGNUM pointer for s (may be NULL)
*/
void ECDSA_SIG_get0(const ECDSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps);
/** Accessor for r field of ECDSA_SIG
* \param sig pointer to ECDSA_SIG structure
*/
const BIGNUM *ECDSA_SIG_get0_r(const ECDSA_SIG *sig);
/** Accessor for s field of ECDSA_SIG
* \param sig pointer to ECDSA_SIG structure
*/
const BIGNUM *ECDSA_SIG_get0_s(const ECDSA_SIG *sig);
/** Setter for r and s fields of ECDSA_SIG
* \param sig pointer to ECDSA_SIG structure
* \param r pointer to BIGNUM for r (may be NULL)
* \param s pointer to BIGNUM for s (may be NULL)
*/
int ECDSA_SIG_set0(ECDSA_SIG *sig, BIGNUM *r, BIGNUM *s);
/** 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 (optional),
* 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);
/** 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 (optional),
* 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);
/** 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);
/********************************************************************/
/* EC_KEY_METHOD constructors, destructors, writers and accessors */
/********************************************************************/
EC_KEY_METHOD *EC_KEY_METHOD_new(const EC_KEY_METHOD *meth);
void EC_KEY_METHOD_free(EC_KEY_METHOD *meth);
void EC_KEY_METHOD_set_init(EC_KEY_METHOD *meth,
int (*init)(EC_KEY *key),
void (*finish)(EC_KEY *key),
int (*copy)(EC_KEY *dest, const EC_KEY *src),
int (*set_group)(EC_KEY *key, const EC_GROUP *grp),
int (*set_private)(EC_KEY *key,
const BIGNUM *priv_key),
int (*set_public)(EC_KEY *key,
const EC_POINT *pub_key));
void EC_KEY_METHOD_set_keygen(EC_KEY_METHOD *meth,
int (*keygen)(EC_KEY *key));
void EC_KEY_METHOD_set_compute_key(EC_KEY_METHOD *meth,
int (*ckey)(unsigned char **psec,
size_t *pseclen,
const EC_POINT *pub_key,
const EC_KEY *ecdh));
void EC_KEY_METHOD_set_sign(EC_KEY_METHOD *meth,
int (*sign)(int type, const unsigned char *dgst,
int dlen, unsigned char *sig,
unsigned int *siglen,
const BIGNUM *kinv, const BIGNUM *r,
EC_KEY *eckey),
int (*sign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
BIGNUM **kinvp, BIGNUM **rp),
ECDSA_SIG *(*sign_sig)(const unsigned char *dgst,
int dgst_len,
const BIGNUM *in_kinv,
const BIGNUM *in_r,
EC_KEY *eckey));
void EC_KEY_METHOD_set_verify(EC_KEY_METHOD *meth,
int (*verify)(int type, const unsigned
char *dgst, int dgst_len,
const unsigned char *sigbuf,
int sig_len, EC_KEY *eckey),
int (*verify_sig)(const unsigned char *dgst,
int dgst_len,
const ECDSA_SIG *sig,
EC_KEY *eckey));
void EC_KEY_METHOD_get_init(const EC_KEY_METHOD *meth,
int (**pinit)(EC_KEY *key),
void (**pfinish)(EC_KEY *key),
int (**pcopy)(EC_KEY *dest, const EC_KEY *src),
int (**pset_group)(EC_KEY *key,
const EC_GROUP *grp),
int (**pset_private)(EC_KEY *key,
const BIGNUM *priv_key),
int (**pset_public)(EC_KEY *key,
const EC_POINT *pub_key));
void EC_KEY_METHOD_get_keygen(const EC_KEY_METHOD *meth,
int (**pkeygen)(EC_KEY *key));
void EC_KEY_METHOD_get_compute_key(const EC_KEY_METHOD *meth,
int (**pck)(unsigned char **psec,
size_t *pseclen,
const EC_POINT *pub_key,
const EC_KEY *ecdh));
void EC_KEY_METHOD_get_sign(const EC_KEY_METHOD *meth,
int (**psign)(int type, const unsigned char *dgst,
int dlen, unsigned char *sig,
unsigned int *siglen,
const BIGNUM *kinv, const BIGNUM *r,
EC_KEY *eckey),
int (**psign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
BIGNUM **kinvp, BIGNUM **rp),
ECDSA_SIG *(**psign_sig)(const unsigned char *dgst,
int dgst_len,
const BIGNUM *in_kinv,
const BIGNUM *in_r,
EC_KEY *eckey));
void EC_KEY_METHOD_get_verify(const EC_KEY_METHOD *meth,
int (**pverify)(int type, const unsigned
char *dgst, int dgst_len,
const unsigned char *sigbuf,
int sig_len, EC_KEY *eckey),
int (**pverify_sig)(const unsigned char *dgst,
int dgst_len,
const ECDSA_SIG *sig,
EC_KEY *eckey));
# define ECParameters_dup(x) ASN1_dup_of(EC_KEY,i2d_ECParameters,d2i_ECParameters,x)
# ifndef __cplusplus
# if defined(__SUNPRO_C)
# if __SUNPRO_C >= 0x520
# pragma error_messages (default,E_ARRAY_OF_INCOMPLETE_NONAME,E_ARRAY_OF_INCOMPLETE)
# endif
# endif
# endif
# define EVP_PKEY_CTX_set_ec_paramgen_curve_nid(ctx, nid) \
EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
EVP_PKEY_OP_PARAMGEN|EVP_PKEY_OP_KEYGEN, \
EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID, nid, NULL)
# define EVP_PKEY_CTX_set_ec_param_enc(ctx, flag) \
EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
EVP_PKEY_OP_PARAMGEN|EVP_PKEY_OP_KEYGEN, \
EVP_PKEY_CTRL_EC_PARAM_ENC, flag, NULL)
# define EVP_PKEY_CTX_set_ecdh_cofactor_mode(ctx, flag) \
EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
EVP_PKEY_OP_DERIVE, \
EVP_PKEY_CTRL_EC_ECDH_COFACTOR, flag, NULL)
# define EVP_PKEY_CTX_get_ecdh_cofactor_mode(ctx) \
EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
EVP_PKEY_OP_DERIVE, \
EVP_PKEY_CTRL_EC_ECDH_COFACTOR, -2, NULL)
# define EVP_PKEY_CTX_set_ecdh_kdf_type(ctx, kdf) \
EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
EVP_PKEY_OP_DERIVE, \
EVP_PKEY_CTRL_EC_KDF_TYPE, kdf, NULL)
# define EVP_PKEY_CTX_get_ecdh_kdf_type(ctx) \
EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
EVP_PKEY_OP_DERIVE, \
EVP_PKEY_CTRL_EC_KDF_TYPE, -2, NULL)
# define EVP_PKEY_CTX_set_ecdh_kdf_md(ctx, md) \
EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
EVP_PKEY_OP_DERIVE, \
EVP_PKEY_CTRL_EC_KDF_MD, 0, (void *)(md))
# define EVP_PKEY_CTX_get_ecdh_kdf_md(ctx, pmd) \
EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
EVP_PKEY_OP_DERIVE, \
EVP_PKEY_CTRL_GET_EC_KDF_MD, 0, (void *)(pmd))
# define EVP_PKEY_CTX_set_ecdh_kdf_outlen(ctx, len) \
EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
EVP_PKEY_OP_DERIVE, \
EVP_PKEY_CTRL_EC_KDF_OUTLEN, len, NULL)
# define EVP_PKEY_CTX_get_ecdh_kdf_outlen(ctx, plen) \
EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
EVP_PKEY_OP_DERIVE, \
EVP_PKEY_CTRL_GET_EC_KDF_OUTLEN, 0, \
(void *)(plen))
# define EVP_PKEY_CTX_set0_ecdh_kdf_ukm(ctx, p, plen) \
EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
EVP_PKEY_OP_DERIVE, \
EVP_PKEY_CTRL_EC_KDF_UKM, plen, (void *)(p))
# define EVP_PKEY_CTX_get0_ecdh_kdf_ukm(ctx, p) \
EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
EVP_PKEY_OP_DERIVE, \
EVP_PKEY_CTRL_GET_EC_KDF_UKM, 0, (void *)(p))
/* SM2 will skip the operation check so no need to pass operation here */
# define EVP_PKEY_CTX_set1_id(ctx, id, id_len) \
EVP_PKEY_CTX_ctrl(ctx, -1, -1, \
EVP_PKEY_CTRL_SET1_ID, (int)id_len, (void*)(id))
# define EVP_PKEY_CTX_get1_id(ctx, id) \
EVP_PKEY_CTX_ctrl(ctx, -1, -1, \
EVP_PKEY_CTRL_GET1_ID, 0, (void*)(id))
# define EVP_PKEY_CTX_get1_id_len(ctx, id_len) \
EVP_PKEY_CTX_ctrl(ctx, -1, -1, \
EVP_PKEY_CTRL_GET1_ID_LEN, 0, (void*)(id_len))
# define EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID (EVP_PKEY_ALG_CTRL + 1)
# define EVP_PKEY_CTRL_EC_PARAM_ENC (EVP_PKEY_ALG_CTRL + 2)
# define EVP_PKEY_CTRL_EC_ECDH_COFACTOR (EVP_PKEY_ALG_CTRL + 3)
# define EVP_PKEY_CTRL_EC_KDF_TYPE (EVP_PKEY_ALG_CTRL + 4)
# define EVP_PKEY_CTRL_EC_KDF_MD (EVP_PKEY_ALG_CTRL + 5)
# define EVP_PKEY_CTRL_GET_EC_KDF_MD (EVP_PKEY_ALG_CTRL + 6)
# define EVP_PKEY_CTRL_EC_KDF_OUTLEN (EVP_PKEY_ALG_CTRL + 7)
# define EVP_PKEY_CTRL_GET_EC_KDF_OUTLEN (EVP_PKEY_ALG_CTRL + 8)
# define EVP_PKEY_CTRL_EC_KDF_UKM (EVP_PKEY_ALG_CTRL + 9)
# define EVP_PKEY_CTRL_GET_EC_KDF_UKM (EVP_PKEY_ALG_CTRL + 10)
# define EVP_PKEY_CTRL_SET1_ID (EVP_PKEY_ALG_CTRL + 11)
# define EVP_PKEY_CTRL_GET1_ID (EVP_PKEY_ALG_CTRL + 12)
# define EVP_PKEY_CTRL_GET1_ID_LEN (EVP_PKEY_ALG_CTRL + 13)
/* KDF types */
# define EVP_PKEY_ECDH_KDF_NONE 1
# define EVP_PKEY_ECDH_KDF_X9_63 2
/** The old name for EVP_PKEY_ECDH_KDF_X9_63
* The ECDH KDF specification has been mistakingly attributed to ANSI X9.62,
* it is actually specified in ANSI X9.63.
* This identifier is retained for backwards compatibility
*/
# define EVP_PKEY_ECDH_KDF_X9_62 EVP_PKEY_ECDH_KDF_X9_63
# ifdef __cplusplus
}
# endif
# endif
#endif