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Diffstat (limited to 'include/openssl/ec.h')
| -rw-r--r-- | include/openssl/ec.h | 1566 |
1 files changed, 1566 insertions, 0 deletions
diff --git a/include/openssl/ec.h b/include/openssl/ec.h new file mode 100644 index 00000000..f59b4f92 --- /dev/null +++ b/include/openssl/ec.h @@ -0,0 +1,1566 @@ +/* + * Copyright 2002-2021 The OpenSSL Project Authors. All Rights Reserved. + * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved + * + * Licensed under the Apache License 2.0 (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 OPENSSL_EC_H +# define OPENSSL_EC_H +# pragma once + +# include <openssl/macros.h> +# ifndef OPENSSL_NO_DEPRECATED_3_0 +# define HEADER_EC_H +# endif + +# include <openssl/opensslconf.h> +# include <openssl/types.h> + +# ifdef __cplusplus +extern "C" { +# endif + +/* Values for EVP_PKEY_CTX_set_ec_param_enc() */ +# define OPENSSL_EC_EXPLICIT_CURVE 0x000 +# define OPENSSL_EC_NAMED_CURVE 0x001 + +int EVP_PKEY_CTX_set_ec_paramgen_curve_nid(EVP_PKEY_CTX *ctx, int nid); +int EVP_PKEY_CTX_set_ec_param_enc(EVP_PKEY_CTX *ctx, int param_enc); +int EVP_PKEY_CTX_set_ecdh_cofactor_mode(EVP_PKEY_CTX *ctx, int cofactor_mode); +int EVP_PKEY_CTX_get_ecdh_cofactor_mode(EVP_PKEY_CTX *ctx); + +int EVP_PKEY_CTX_set_ecdh_kdf_type(EVP_PKEY_CTX *ctx, int kdf); +int EVP_PKEY_CTX_get_ecdh_kdf_type(EVP_PKEY_CTX *ctx); + +int EVP_PKEY_CTX_set_ecdh_kdf_md(EVP_PKEY_CTX *ctx, const EVP_MD *md); +int EVP_PKEY_CTX_get_ecdh_kdf_md(EVP_PKEY_CTX *ctx, const EVP_MD **md); + +int EVP_PKEY_CTX_set_ecdh_kdf_outlen(EVP_PKEY_CTX *ctx, int len); +int EVP_PKEY_CTX_get_ecdh_kdf_outlen(EVP_PKEY_CTX *ctx, int *len); + +int EVP_PKEY_CTX_set0_ecdh_kdf_ukm(EVP_PKEY_CTX *ctx, unsigned char *ukm, + int len); +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 +int EVP_PKEY_CTX_get0_ecdh_kdf_ukm(EVP_PKEY_CTX *ctx, unsigned char **ukm); +# endif + +# 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) + +/* 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 mistakenly 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 + +/** 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; + +const char *OSSL_EC_curve_nid2name(int nid); + +# ifndef OPENSSL_NO_EC +# include <openssl/asn1.h> +# include <openssl/symhacks.h> +# ifndef OPENSSL_NO_DEPRECATED_1_1_0 +# include <openssl/bn.h> +# endif +# include <openssl/ecerr.h> + +# ifndef OPENSSL_ECC_MAX_FIELD_BITS +# define OPENSSL_ECC_MAX_FIELD_BITS 661 +# endif + +# include <openssl/params.h> +# ifndef OPENSSL_NO_DEPRECATED_3_0 +typedef struct ec_method_st EC_METHOD; +# endif +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) */ +/********************************************************************/ + +# ifndef OPENSSL_NO_DEPRECATED_3_0 +/** Returns the basic GFp ec methods which provides the basis for the + * optimized methods. + * \return EC_METHOD object + */ +OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_simple_method(void); + +/** Returns GFp methods using montgomery multiplication. + * \return EC_METHOD object + */ +OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_mont_method(void); + +/** Returns GFp methods using optimized methods for NIST recommended curves + * \return EC_METHOD object + */ +OSSL_DEPRECATEDIN_3_0 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 + */ +OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_nistp224_method(void); + +/** Returns 64-bit optimized methods for nistp256 + * \return EC_METHOD object + */ +OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_nistp256_method(void); + +/** Returns 64-bit optimized methods for nistp521 + * \return EC_METHOD object + */ +OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_nistp521_method(void); +# endif /* OPENSSL_NO_EC_NISTP_64_GCC_128 */ + +# ifndef OPENSSL_NO_EC2M +/********************************************************************/ +/* EC_METHOD for curves over GF(2^m) */ +/********************************************************************/ + +/** Returns the basic GF2m ec method + * \return EC_METHOD object + */ +OSSL_DEPRECATEDIN_3_0 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. + */ +OSSL_DEPRECATEDIN_3_0 EC_GROUP *EC_GROUP_new(const EC_METHOD *meth); + +/** Clears and frees a EC_GROUP object + * \param group EC_GROUP object to be cleared and freed. + */ +OSSL_DEPRECATEDIN_3_0 void EC_GROUP_clear_free(EC_GROUP *group); + +/** Returns the EC_METHOD of the EC_GROUP object. + * \param group EC_GROUP object + * \return EC_METHOD used in this EC_GROUP object. + */ +OSSL_DEPRECATEDIN_3_0 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. + */ +OSSL_DEPRECATEDIN_3_0 int EC_METHOD_get_field_type(const EC_METHOD *meth); +# endif /* OPENSSL_NO_DEPRECATED_3_0 */ + +/** Frees a EC_GROUP object + * \param group EC_GROUP object to be freed. + */ +void EC_GROUP_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 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); + +/** 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); + +/** Gets the field of an EC_GROUP + * \param group EC_GROUP object + * \return the group field + */ +const BIGNUM *EC_GROUP_get0_field(const EC_GROUP *group); + +/** Returns the field type of the EC_GROUP. + * \param group EC_GROUP object + * \return NID of the underlying field type OID. + */ +int EC_GROUP_get_field_type(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 an 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); + +# ifndef OPENSSL_NO_DEPRECATED_3_0 +/** 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 + */ +OSSL_DEPRECATEDIN_3_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 + */ +OSSL_DEPRECATEDIN_3_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 + */ +OSSL_DEPRECATEDIN_3_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 + */ +OSSL_DEPRECATEDIN_3_0 int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, + BIGNUM *p, + BIGNUM *a, BIGNUM *b, + BN_CTX *ctx); +# endif /* OPENSSL_NO_EC2M */ +# endif /* OPENSSL_NO_DEPRECATED_3_0 */ + +/** 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 parameters. + * The parameters may be explicit or a named curve, + * \param params A list of parameters describing the group. + * \param libctx The associated library context or NULL for the default + * context + * \param propq A property query string + * \return newly created EC_GROUP object with specified parameters or NULL + * if an error occurred + */ +EC_GROUP *EC_GROUP_new_from_params(const OSSL_PARAM params[], + OSSL_LIB_CTX *libctx, const char *propq); + +/** + * Creates a EC_GROUP object with a curve specified by a NID + * \param libctx The associated library context or NULL for the default + * context + * \param propq A property query string + * \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_ex(OSSL_LIB_CTX *libctx, const char *propq, + int nid); + +/** + * Creates a EC_GROUP object with a curve specified by a NID. Same as + * EC_GROUP_new_by_curve_name_ex but the libctx and propq are always + * NULL. + * \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); +int EC_GROUP_check_named_curve(const EC_GROUP *group, int nist_only, + BN_CTX *ctx); + +/********************************************************************/ +/* 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); + +/** 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); + +# ifndef OPENSSL_NO_DEPRECATED_3_0 +/** Returns the EC_METHOD used in EC_POINT object + * \param point EC_POINT object + * \return the EC_METHOD used + */ +OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_POINT_method_of(const 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 + */ +OSSL_DEPRECATEDIN_3_0 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 + */ +OSSL_DEPRECATEDIN_3_0 int EC_POINT_get_Jprojective_coordinates_GFp + (const EC_GROUP *group, const EC_POINT *p, + BIGNUM *x, BIGNUM *y, BIGNUM *z, BN_CTX *ctx); +# endif /* OPENSSL_NO_DEPRECATED_3_0 */ + +/** 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); + +# ifndef OPENSSL_NO_DEPRECATED_3_0 +/** 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 + */ +OSSL_DEPRECATEDIN_3_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 + */ +OSSL_DEPRECATEDIN_3_0 int EC_POINT_get_affine_coordinates_GFp + (const EC_GROUP *group, const EC_POINT *p, + BIGNUM *x, BIGNUM *y, BN_CTX *ctx); +# endif /* OPENSSL_NO_DEPRECATED_3_0 */ + +/** 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); + +# ifndef OPENSSL_NO_DEPRECATED_3_0 +/** 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 + */ +OSSL_DEPRECATEDIN_3_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 + */ +OSSL_DEPRECATEDIN_3_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 + */ +OSSL_DEPRECATEDIN_3_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 + */ +OSSL_DEPRECATEDIN_3_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 +# endif /* OPENSSL_NO_DEPRECATED_3_0 */ + +/** 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: */ +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 BIGNUM *EC_POINT_point2bn(const EC_GROUP *, + const EC_POINT *, + point_conversion_form_t form, + BIGNUM *, BN_CTX *); +OSSL_DEPRECATEDIN_3_0 EC_POINT *EC_POINT_bn2point(const EC_GROUP *, + const BIGNUM *, + EC_POINT *, BN_CTX *); +# endif /* OPENSSL_NO_DEPRECATED_3_0 */ + +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); + +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 int EC_POINT_make_affine(const EC_GROUP *group, + EC_POINT *point, BN_CTX *ctx); +OSSL_DEPRECATEDIN_3_0 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 + */ +OSSL_DEPRECATEDIN_3_0 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); +# endif /* OPENSSL_NO_DEPRECATED_3_0 */ + +/** 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); + +# ifndef OPENSSL_NO_DEPRECATED_3_0 +/** 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 + */ +OSSL_DEPRECATEDIN_3_0 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 + */ +OSSL_DEPRECATEDIN_3_0 int EC_GROUP_have_precompute_mult(const EC_GROUP *group); +# endif /* OPENSSL_NO_DEPRECATED_3_0 */ + +/********************************************************************/ +/* 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 + +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(EC_GROUP, i2d_ECPKParameters, bp, x) +# define d2i_ECPKParameters_fp(fp,x) \ + (EC_GROUP *)ASN1_d2i_fp(NULL, (d2i_of_void *)d2i_ECPKParameters, (fp), \ + (void **)(x)) +# define i2d_ECPKParameters_fp(fp,x) \ + ASN1_i2d_fp((i2d_of_void *)i2d_ECPKParameters, (fp), (void *)(x)) + +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 int ECPKParameters_print(BIO *bp, const EC_GROUP *x, + int off); +# ifndef OPENSSL_NO_STDIO +OSSL_DEPRECATEDIN_3_0 int ECPKParameters_print_fp(FILE *fp, const EC_GROUP *x, + int off); +# endif +# endif /* OPENSSL_NO_DEPRECATED_3_0 */ + +/********************************************************************/ +/* 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_SM2_RANGE 0x0004 +# define EC_FLAG_COFACTOR_ECDH 0x1000 +# define EC_FLAG_CHECK_NAMED_GROUP 0x2000 +# define EC_FLAG_CHECK_NAMED_GROUP_NIST 0x4000 +# define EC_FLAG_CHECK_NAMED_GROUP_MASK \ + (EC_FLAG_CHECK_NAMED_GROUP | EC_FLAG_CHECK_NAMED_GROUP_NIST) + +/* Deprecated flags - it was using 0x01..0x02 */ +# define EC_FLAG_NON_FIPS_ALLOW 0x0000 +# define EC_FLAG_FIPS_CHECKED 0x0000 + +# ifndef OPENSSL_NO_DEPRECATED_3_0 +/** + * Creates a new EC_KEY object. + * \param ctx The library context for to use for this EC_KEY. May be NULL in + * which case the default library context is used. + * \return EC_KEY object or NULL if an error occurred. + */ +OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_new_ex(OSSL_LIB_CTX *ctx, const char *propq); + +/** + * Creates a new EC_KEY object. Same as calling EC_KEY_new_ex with a + * NULL library context + * \return EC_KEY object or NULL if an error occurred. + */ +OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_new(void); + +OSSL_DEPRECATEDIN_3_0 int EC_KEY_get_flags(const EC_KEY *key); + +OSSL_DEPRECATEDIN_3_0 void EC_KEY_set_flags(EC_KEY *key, int flags); + +OSSL_DEPRECATEDIN_3_0 void EC_KEY_clear_flags(EC_KEY *key, int flags); + +OSSL_DEPRECATEDIN_3_0 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 ctx The library context for to use for this EC_KEY. May be NULL in + * which case the default library context is used. + * \param propq Any property query string + * \param nid NID of the named curve. + * \return EC_KEY object or NULL if an error occurred. + */ +OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_new_by_curve_name_ex(OSSL_LIB_CTX *ctx, + const char *propq, + int nid); + +/** + * Creates a new EC_KEY object using a named curve as underlying + * EC_GROUP object. Same as calling EC_KEY_new_by_curve_name_ex with a NULL + * library context and property query string. + * \param nid NID of the named curve. + * \return EC_KEY object or NULL if an error occurred. + */ +OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_new_by_curve_name(int nid); + +/** Frees a EC_KEY object. + * \param key EC_KEY object to be freed. + */ +OSSL_DEPRECATEDIN_3_0 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. + */ +OSSL_DEPRECATEDIN_3_0 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. + */ +OSSL_DEPRECATEDIN_3_0 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. + */ +OSSL_DEPRECATEDIN_3_0 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). + */ +OSSL_DEPRECATEDIN_3_0 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). + */ +OSSL_DEPRECATEDIN_3_0 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. + */ +OSSL_DEPRECATEDIN_3_0 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). + */ +OSSL_DEPRECATEDIN_3_0 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. + */ +OSSL_DEPRECATEDIN_3_0 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) + */ +OSSL_DEPRECATEDIN_3_0 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. + */ +OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub); + +OSSL_DEPRECATEDIN_3_0 unsigned EC_KEY_get_enc_flags(const EC_KEY *key); +OSSL_DEPRECATEDIN_3_0 void EC_KEY_set_enc_flags(EC_KEY *eckey, unsigned int flags); +OSSL_DEPRECATEDIN_3_0 point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key); +OSSL_DEPRECATEDIN_3_0 void EC_KEY_set_conv_form(EC_KEY *eckey, + point_conversion_form_t cform); +# endif /*OPENSSL_NO_DEPRECATED_3_0 */ + +# 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) + +# ifndef OPENSSL_NO_DEPRECATED_3_0 +OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_ex_data(EC_KEY *key, int idx, void *arg); +OSSL_DEPRECATEDIN_3_0 void *EC_KEY_get_ex_data(const EC_KEY *key, int idx); + +/* wrapper functions for the underlying EC_GROUP object */ +OSSL_DEPRECATEDIN_3_0 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. + */ +OSSL_DEPRECATEDIN_3_0 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. + */ +OSSL_DEPRECATEDIN_3_0 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. + */ +OSSL_DEPRECATEDIN_3_0 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. + */ +OSSL_DEPRECATEDIN_3_0 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. + */ +OSSL_DEPRECATEDIN_3_0 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 + */ +OSSL_DEPRECATEDIN_3_0 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 + */ + +OSSL_DEPRECATEDIN_3_0 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 + */ + +OSSL_DEPRECATEDIN_3_0 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 + */ + +OSSL_DEPRECATEDIN_3_0 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 + */ +OSSL_DEPRECATEDIN_3_0 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. + */ +OSSL_DEPRECATEDIN_3_0 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. + */ +OSSL_DEPRECATEDIN_3_0 int i2d_ECPrivateKey(const 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. + */ +OSSL_DEPRECATEDIN_3_0 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. + */ +OSSL_DEPRECATEDIN_3_0 int i2d_ECParameters(const EC_KEY *key, + unsigned char **out); + +/********************************************************************/ +/* de- and encoding functions for EC public key */ +/* (octet string, not DER -- hence 'o2i' and 'i2o') */ +/********************************************************************/ + +/** Decodes an 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. + */ +OSSL_DEPRECATEDIN_3_0 EC_KEY *o2i_ECPublicKey(EC_KEY **key, + const unsigned char **in, long len); + +/** Encodes an 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 + */ +OSSL_DEPRECATEDIN_3_0 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 + */ +OSSL_DEPRECATEDIN_3_0 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 + */ +OSSL_DEPRECATEDIN_3_0 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 + */ +OSSL_DEPRECATEDIN_3_0 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 + */ +OSSL_DEPRECATEDIN_3_0 int EC_KEY_print_fp(FILE *fp, const EC_KEY *key, int off); +# endif /* OPENSSL_NO_STDIO */ + +OSSL_DEPRECATEDIN_3_0 const EC_KEY_METHOD *EC_KEY_OpenSSL(void); +OSSL_DEPRECATEDIN_3_0 const EC_KEY_METHOD *EC_KEY_get_default_method(void); +OSSL_DEPRECATEDIN_3_0 void EC_KEY_set_default_method(const EC_KEY_METHOD *meth); +OSSL_DEPRECATEDIN_3_0 const EC_KEY_METHOD *EC_KEY_get_method(const EC_KEY *key); +OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_method(EC_KEY *key, const EC_KEY_METHOD *meth); +OSSL_DEPRECATEDIN_3_0 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 + */ +OSSL_DEPRECATEDIN_3_0 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); + +OSSL_DEPRECATEDIN_3_0 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)); +# endif /* OPENSSL_NO_DEPRECATED_3_0 */ + +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); + +/** i2d_ECDSA_SIG encodes content of ECDSA_SIG (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 + */ +DECLARE_ASN1_ENCODE_FUNCTIONS_only(ECDSA_SIG, ECDSA_SIG) + +/** d2i_ECDSA_SIG decodes an ECDSA signature (note: this function modifies *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) + */ + +/** 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 + * \param s pointer to BIGNUM for s + */ +int ECDSA_SIG_set0(ECDSA_SIG *sig, BIGNUM *r, BIGNUM *s); + +# ifndef OPENSSL_NO_DEPRECATED_3_0 +/** 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 + */ +OSSL_DEPRECATEDIN_3_0 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 + */ +OSSL_DEPRECATEDIN_3_0 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 + */ +OSSL_DEPRECATEDIN_3_0 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 + */ +OSSL_DEPRECATEDIN_3_0 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 + */ +OSSL_DEPRECATEDIN_3_0 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 + */ +OSSL_DEPRECATEDIN_3_0 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 + */ +OSSL_DEPRECATEDIN_3_0 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 + */ +OSSL_DEPRECATEDIN_3_0 int ECDSA_size(const EC_KEY *eckey); + +/********************************************************************/ +/* EC_KEY_METHOD constructors, destructors, writers and accessors */ +/********************************************************************/ + +OSSL_DEPRECATEDIN_3_0 EC_KEY_METHOD *EC_KEY_METHOD_new(const EC_KEY_METHOD *meth); +OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_free(EC_KEY_METHOD *meth); +OSSL_DEPRECATEDIN_3_0 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)); + +OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_set_keygen(EC_KEY_METHOD *meth, + int (*keygen)(EC_KEY *key)); + +OSSL_DEPRECATEDIN_3_0 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)); + +OSSL_DEPRECATEDIN_3_0 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)); + +OSSL_DEPRECATEDIN_3_0 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)); + +OSSL_DEPRECATEDIN_3_0 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)); + +OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_get_keygen + (const EC_KEY_METHOD *meth, int (**pkeygen)(EC_KEY *key)); + +OSSL_DEPRECATEDIN_3_0 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)); + +OSSL_DEPRECATEDIN_3_0 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)); + +OSSL_DEPRECATEDIN_3_0 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)); +# endif /* OPENSSL_NO_DEPRECATED_3_0 */ + +# define EVP_EC_gen(curve) \ + EVP_PKEY_Q_keygen(NULL, NULL, "EC", (char *)(strstr(curve, ""))) +# 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 + +# endif +# ifdef __cplusplus +} +# endif +#endif |