include/openssl/ec.h

   1 /*
   2  * Copyright 2002-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
   4  *
   5  * Licensed under the Apache License 2.0 (the "License").  You may not use
   6  * this file except in compliance with the License.  You can obtain a copy
   7  * in the file LICENSE in the source distribution or at
   8  * https://www.openssl.org/source/license.html
   9  */
  10
  11 #ifndef HEADER_EC_H
  12 # define HEADER_EC_H
  13
  14 # include <openssl/opensslconf.h>
  15
  16 # ifndef OPENSSL_NO_EC
  17 # include <openssl/asn1.h>
  18 # include <openssl/symhacks.h>
  19 # if !OPENSSL_API_1_1_0
  20 #  include <openssl/bn.h>
  21 # endif
  22 # include <openssl/ecerr.h>
  23 # ifdef  __cplusplus
  24 extern "C" {
  25 # endif
  26
  27 # ifndef OPENSSL_ECC_MAX_FIELD_BITS
  28 #  define OPENSSL_ECC_MAX_FIELD_BITS 661
  29 # endif
  30
  31 /** Enum for the point conversion form as defined in X9.62 (ECDSA)
  32  *  for the encoding of a elliptic curve point (x,y) */
  33 typedef enum {
  34         /** the point is encoded as z||x, where the octet z specifies
  35          *  which solution of the quadratic equation y is  */
  36     POINT_CONVERSION_COMPRESSED = 2,
  37         /** the point is encoded as z||x||y, where z is the octet 0x04  */
  38     POINT_CONVERSION_UNCOMPRESSED = 4,
  39         /** the point is encoded as z||x||y, where the octet z specifies
  40          *  which solution of the quadratic equation y is  */
  41     POINT_CONVERSION_HYBRID = 6
  42 } point_conversion_form_t;
  43
  44 typedef struct ec_method_st EC_METHOD;
  45 typedef struct ec_group_st EC_GROUP;
  46 typedef struct ec_point_st EC_POINT;
  47 typedef struct ecpk_parameters_st ECPKPARAMETERS;
  48 typedef struct ec_parameters_st ECPARAMETERS;
  49
  50 /********************************************************************/
  51 /*               EC_METHODs for curves over GF(p)                   */
  52 /********************************************************************/
  53
  54 /** Returns the basic GFp ec methods which provides the basis for the
  55  *  optimized methods.
  56  *  \return  EC_METHOD object
  57  */
  58 const EC_METHOD *EC_GFp_simple_method(void);
  59
  60 /** Returns GFp methods using montgomery multiplication.
  61  *  \return  EC_METHOD object
  62  */
  63 const EC_METHOD *EC_GFp_mont_method(void);
  64
  65 /** Returns GFp methods using optimized methods for NIST recommended curves
  66  *  \return  EC_METHOD object
  67  */
  68 const EC_METHOD *EC_GFp_nist_method(void);
  69
  70 # ifndef OPENSSL_NO_EC_NISTP_64_GCC_128
  71 /** Returns 64-bit optimized methods for nistp224
  72  *  \return  EC_METHOD object
  73  */
  74 const EC_METHOD *EC_GFp_nistp224_method(void);
  75
  76 /** Returns 64-bit optimized methods for nistp256
  77  *  \return  EC_METHOD object
  78  */
  79 const EC_METHOD *EC_GFp_nistp256_method(void);
  80
  81 /** Returns 64-bit optimized methods for nistp521
  82  *  \return  EC_METHOD object
  83  */
  84 const EC_METHOD *EC_GFp_nistp521_method(void);
  85 # endif
  86
  87 # ifndef OPENSSL_NO_EC2M
  88 /********************************************************************/
  89 /*           EC_METHOD for curves over GF(2^m)                      */
  90 /********************************************************************/
  91
  92 /** Returns the basic GF2m ec method
  93  *  \return  EC_METHOD object
  94  */
  95 const EC_METHOD *EC_GF2m_simple_method(void);
  96
  97 # endif
  98
  99 /********************************************************************/
 100 /*                   EC_GROUP functions                             */
 101 /********************************************************************/
 102
 103 /** Creates a new EC_GROUP object
 104  *  \param   meth  EC_METHOD to use
 105  *  \return  newly created EC_GROUP object or NULL in case of an error.
 106  */
 107 EC_GROUP *EC_GROUP_new(const EC_METHOD *meth);
 108
 109 /** Frees a EC_GROUP object
 110  *  \param  group  EC_GROUP object to be freed.
 111  */
 112 void EC_GROUP_free(EC_GROUP *group);
 113
 114 /** Clears and frees a EC_GROUP object
 115  *  \param  group  EC_GROUP object to be cleared and freed.
 116  */
 117 void EC_GROUP_clear_free(EC_GROUP *group);
 118
 119 /** Copies EC_GROUP objects. Note: both EC_GROUPs must use the same EC_METHOD.
 120  *  \param  dst  destination EC_GROUP object
 121  *  \param  src  source EC_GROUP object
 122  *  \return 1 on success and 0 if an error occurred.
 123  */
 124 int EC_GROUP_copy(EC_GROUP *dst, const EC_GROUP *src);
 125
 126 /** Creates a new EC_GROUP object and copies the copies the content
 127  *  form src to the newly created EC_KEY object
 128  *  \param  src  source EC_GROUP object
 129  *  \return newly created EC_GROUP object or NULL in case of an error.
 130  */
 131 EC_GROUP *EC_GROUP_dup(const EC_GROUP *src);
 132
 133 /** Returns the EC_METHOD of the EC_GROUP object.
 134  *  \param  group  EC_GROUP object
 135  *  \return EC_METHOD used in this EC_GROUP object.
 136  */
 137 const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group);
 138
 139 /** Returns the field type of the EC_METHOD.
 140  *  \param  meth  EC_METHOD object
 141  *  \return NID of the underlying field type OID.
 142  */
 143 int EC_METHOD_get_field_type(const EC_METHOD *meth);
 144
 145 /** Sets the generator and it's order/cofactor of a EC_GROUP object.
 146  *  \param  group      EC_GROUP object
 147  *  \param  generator  EC_POINT object with the generator.
 148  *  \param  order      the order of the group generated by the generator.
 149  *  \param  cofactor   the index of the sub-group generated by the generator
 150  *                     in the group of all points on the elliptic curve.
 151  *  \return 1 on success and 0 if an error occurred
 152  */
 153 int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator,
 154                            const BIGNUM *order, const BIGNUM *cofactor);
 155
 156 /** Returns the generator of a EC_GROUP object.
 157  *  \param  group  EC_GROUP object
 158  *  \return the currently used generator (possibly NULL).
 159  */
 160 const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group);
 161
 162 /** Returns the montgomery data for order(Generator)
 163  *  \param  group  EC_GROUP object
 164  *  \return the currently used montgomery data (possibly NULL).
 165 */
 166 BN_MONT_CTX *EC_GROUP_get_mont_data(const EC_GROUP *group);
 167
 168 /** Gets the order of a EC_GROUP
 169  *  \param  group  EC_GROUP object
 170  *  \param  order  BIGNUM to which the order is copied
 171  *  \param  ctx    unused
 172  *  \return 1 on success and 0 if an error occurred
 173  */
 174 int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx);
 175
 176 /** Gets the order of an EC_GROUP
 177  *  \param  group  EC_GROUP object
 178  *  \return the group order
 179  */
 180 const BIGNUM *EC_GROUP_get0_order(const EC_GROUP *group);
 181
 182 /** Gets the number of bits of the order of an EC_GROUP
 183  *  \param  group  EC_GROUP object
 184  *  \return number of bits of group order.
 185  */
 186 int EC_GROUP_order_bits(const EC_GROUP *group);
 187
 188 /** Gets the cofactor of a EC_GROUP
 189  *  \param  group     EC_GROUP object
 190  *  \param  cofactor  BIGNUM to which the cofactor is copied
 191  *  \param  ctx       unused
 192  *  \return 1 on success and 0 if an error occurred
 193  */
 194 int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor,
 195                           BN_CTX *ctx);
 196
 197 /** Gets the cofactor of an EC_GROUP
 198  *  \param  group  EC_GROUP object
 199  *  \return the group cofactor
 200  */
 201 const BIGNUM *EC_GROUP_get0_cofactor(const EC_GROUP *group);
 202
 203 /** Sets the name of a EC_GROUP object
 204  *  \param  group  EC_GROUP object
 205  *  \param  nid    NID of the curve name OID
 206  */
 207 void EC_GROUP_set_curve_name(EC_GROUP *group, int nid);
 208
 209 /** Returns the curve name of a EC_GROUP object
 210  *  \param  group  EC_GROUP object
 211  *  \return NID of the curve name OID or 0 if not set.
 212  */
 213 int EC_GROUP_get_curve_name(const EC_GROUP *group);
 214
 215 /** Gets the field of an EC_GROUP
 216  *  \param  group  EC_GROUP object
 217  *  \return the group field
 218  */
 219 const BIGNUM *EC_GROUP_get0_field(const EC_GROUP *group);
 220
 221 void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag);
 222 int EC_GROUP_get_asn1_flag(const EC_GROUP *group);
 223
 224 void EC_GROUP_set_point_conversion_form(EC_GROUP *group,
 225                                         point_conversion_form_t form);
 226 point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP *);
 227
 228 unsigned char *EC_GROUP_get0_seed(const EC_GROUP *x);
 229 size_t EC_GROUP_get_seed_len(const EC_GROUP *);
 230 size_t EC_GROUP_set_seed(EC_GROUP *, const unsigned char *, size_t len);
 231
 232 /** Sets the parameters of a ec curve defined by y^2 = x^3 + a*x + b (for GFp)
 233  *  or y^2 + x*y = x^3 + a*x^2 + b (for GF2m)
 234  *  \param  group  EC_GROUP object
 235  *  \param  p      BIGNUM with the prime number (GFp) or the polynomial
 236  *                 defining the underlying field (GF2m)
 237  *  \param  a      BIGNUM with parameter a of the equation
 238  *  \param  b      BIGNUM with parameter b of the equation
 239  *  \param  ctx    BN_CTX object (optional)
 240  *  \return 1 on success and 0 if an error occurred
 241  */
 242 int EC_GROUP_set_curve(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a,
 243                        const BIGNUM *b, BN_CTX *ctx);
 244
 245 /** Gets the parameters of the ec curve defined by y^2 = x^3 + a*x + b (for GFp)
 246  *  or y^2 + x*y = x^3 + a*x^2 + b (for GF2m)
 247  *  \param  group  EC_GROUP object
 248  *  \param  p      BIGNUM with the prime number (GFp) or the polynomial
 249  *                 defining the underlying field (GF2m)
 250  *  \param  a      BIGNUM for parameter a of the equation
 251  *  \param  b      BIGNUM for parameter b of the equation
 252  *  \param  ctx    BN_CTX object (optional)
 253  *  \return 1 on success and 0 if an error occurred
 254  */
 255 int EC_GROUP_get_curve(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b,
 256                        BN_CTX *ctx);
 257
 258 /** Sets the parameters of an ec curve. Synonym for EC_GROUP_set_curve
 259  *  \param  group  EC_GROUP object
 260  *  \param  p      BIGNUM with the prime number (GFp) or the polynomial
 261  *                 defining the underlying field (GF2m)
 262  *  \param  a      BIGNUM with parameter a of the equation
 263  *  \param  b      BIGNUM with parameter b of the equation
 264  *  \param  ctx    BN_CTX object (optional)
 265  *  \return 1 on success and 0 if an error occurred
 266  */
 267 DEPRECATEDIN_3(int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p,
 268                                           const BIGNUM *a, const BIGNUM *b,
 269                                           BN_CTX *ctx))
 270
 271 /** Gets the parameters of an ec curve. Synonym for EC_GROUP_get_curve
 272  *  \param  group  EC_GROUP object
 273  *  \param  p      BIGNUM with the prime number (GFp) or the polynomial
 274  *                 defining the underlying field (GF2m)
 275  *  \param  a      BIGNUM for parameter a of the equation
 276  *  \param  b      BIGNUM for parameter b of the equation
 277  *  \param  ctx    BN_CTX object (optional)
 278  *  \return 1 on success and 0 if an error occurred
 279  */
 280 DEPRECATEDIN_3(int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p,
 281                                           BIGNUM *a, BIGNUM *b,
 282                                           BN_CTX *ctx))
 283
 284 # ifndef OPENSSL_NO_EC2M
 285 /** Sets the parameter of an ec curve. Synonym for EC_GROUP_set_curve
 286  *  \param  group  EC_GROUP object
 287  *  \param  p      BIGNUM with the prime number (GFp) or the polynomial
 288  *                 defining the underlying field (GF2m)
 289  *  \param  a      BIGNUM with parameter a of the equation
 290  *  \param  b      BIGNUM with parameter b of the equation
 291  *  \param  ctx    BN_CTX object (optional)
 292  *  \return 1 on success and 0 if an error occurred
 293  */
 294 DEPRECATEDIN_3(int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p,
 295                                            const BIGNUM *a, const BIGNUM *b,
 296                                            BN_CTX *ctx))
 297
 298 /** Gets the parameters of an ec curve. Synonym for EC_GROUP_get_curve
 299  *  \param  group  EC_GROUP object
 300  *  \param  p      BIGNUM with the prime number (GFp) or the polynomial
 301  *                 defining the underlying field (GF2m)
 302  *  \param  a      BIGNUM for parameter a of the equation
 303  *  \param  b      BIGNUM for parameter b of the equation
 304  *  \param  ctx    BN_CTX object (optional)
 305  *  \return 1 on success and 0 if an error occurred
 306  */
 307 DEPRECATEDIN_3(int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p,
 308                                            BIGNUM *a, BIGNUM *b,
 309                                            BN_CTX *ctx))
 310 # endif
 311 /** Returns the number of bits needed to represent a field element
 312  *  \param  group  EC_GROUP object
 313  *  \return number of bits needed to represent a field element
 314  */
 315 int EC_GROUP_get_degree(const EC_GROUP *group);
 316
 317 /** Checks whether the parameter in the EC_GROUP define a valid ec group
 318  *  \param  group  EC_GROUP object
 319  *  \param  ctx    BN_CTX object (optional)
 320  *  \return 1 if group is a valid ec group and 0 otherwise
 321  */
 322 int EC_GROUP_check(const EC_GROUP *group, BN_CTX *ctx);
 323
 324 /** Checks whether the discriminant of the elliptic curve is zero or not
 325  *  \param  group  EC_GROUP object
 326  *  \param  ctx    BN_CTX object (optional)
 327  *  \return 1 if the discriminant is not zero and 0 otherwise
 328  */
 329 int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx);
 330
 331 /** Compares two EC_GROUP objects
 332  *  \param  a    first EC_GROUP object
 333  *  \param  b    second EC_GROUP object
 334  *  \param  ctx  BN_CTX object (optional)
 335  *  \return 0 if the groups are equal, 1 if not, or -1 on error
 336  */
 337 int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx);
 338
 339 /*
 340  * EC_GROUP_new_GF*() calls EC_GROUP_new() and EC_GROUP_set_GF*() after
 341  * choosing an appropriate EC_METHOD
 342  */
 343
 344 /** Creates a new EC_GROUP object with the specified parameters defined
 345  *  over GFp (defined by the equation y^2 = x^3 + a*x + b)
 346  *  \param  p    BIGNUM with the prime number
 347  *  \param  a    BIGNUM with the parameter a of the equation
 348  *  \param  b    BIGNUM with the parameter b of the equation
 349  *  \param  ctx  BN_CTX object (optional)
 350  *  \return newly created EC_GROUP object with the specified parameters
 351  */
 352 EC_GROUP *EC_GROUP_new_curve_GFp(const BIGNUM *p, const BIGNUM *a,
 353                                  const BIGNUM *b, BN_CTX *ctx);
 354 # ifndef OPENSSL_NO_EC2M
 355 /** Creates a new EC_GROUP object with the specified parameters defined
 356  *  over GF2m (defined by the equation y^2 + x*y = x^3 + a*x^2 + b)
 357  *  \param  p    BIGNUM with the polynomial defining the underlying field
 358  *  \param  a    BIGNUM with the parameter a of the equation
 359  *  \param  b    BIGNUM with the parameter b of the equation
 360  *  \param  ctx  BN_CTX object (optional)
 361  *  \return newly created EC_GROUP object with the specified parameters
 362  */
 363 EC_GROUP *EC_GROUP_new_curve_GF2m(const BIGNUM *p, const BIGNUM *a,
 364                                   const BIGNUM *b, BN_CTX *ctx);
 365 # endif
 366
 367 /** Creates a EC_GROUP object with a curve specified by a NID
 368  *  \param  nid  NID of the OID of the curve name
 369  *  \return newly created EC_GROUP object with specified curve or NULL
 370  *          if an error occurred
 371  */
 372 EC_GROUP *EC_GROUP_new_by_curve_name(int nid);
 373
 374 /** Creates a new EC_GROUP object from an ECPARAMETERS object
 375  *  \param  params  pointer to the ECPARAMETERS object
 376  *  \return newly created EC_GROUP object with specified curve or NULL
 377  *          if an error occurred
 378  */
 379 EC_GROUP *EC_GROUP_new_from_ecparameters(const ECPARAMETERS *params);
 380
 381 /** Creates an ECPARAMETERS object for the given EC_GROUP object.
 382  *  \param  group   pointer to the EC_GROUP object
 383  *  \param  params  pointer to an existing ECPARAMETERS object or NULL
 384  *  \return pointer to the new ECPARAMETERS object or NULL
 385  *          if an error occurred.
 386  */
 387 ECPARAMETERS *EC_GROUP_get_ecparameters(const EC_GROUP *group,
 388                                         ECPARAMETERS *params);
 389
 390 /** Creates a new EC_GROUP object from an ECPKPARAMETERS object
 391  *  \param  params  pointer to an existing ECPKPARAMETERS object, or NULL
 392  *  \return newly created EC_GROUP object with specified curve, or NULL
 393  *          if an error occurred
 394  */
 395 EC_GROUP *EC_GROUP_new_from_ecpkparameters(const ECPKPARAMETERS *params);
 396
 397 /** Creates an ECPKPARAMETERS object for the given EC_GROUP object.
 398  *  \param  group   pointer to the EC_GROUP object
 399  *  \param  params  pointer to an existing ECPKPARAMETERS object or NULL
 400  *  \return pointer to the new ECPKPARAMETERS object or NULL
 401  *          if an error occurred.
 402  */
 403 ECPKPARAMETERS *EC_GROUP_get_ecpkparameters(const EC_GROUP *group,
 404                                             ECPKPARAMETERS *params);
 405
 406 /********************************************************************/
 407 /*               handling of internal curves                        */
 408 /********************************************************************/
 409
 410 typedef struct {
 411     int nid;
 412     const char *comment;
 413 } EC_builtin_curve;
 414
 415 /*
 416  * EC_builtin_curves(EC_builtin_curve *r, size_t size) returns number of all
 417  * available curves or zero if a error occurred. In case r is not zero,
 418  * nitems EC_builtin_curve structures are filled with the data of the first
 419  * nitems internal groups
 420  */
 421 size_t EC_get_builtin_curves(EC_builtin_curve *r, size_t nitems);
 422
 423 const char *EC_curve_nid2nist(int nid);
 424 int EC_curve_nist2nid(const char *name);
 425
 426 /********************************************************************/
 427 /*                    EC_POINT functions                            */
 428 /********************************************************************/
 429
 430 /** Creates a new EC_POINT object for the specified EC_GROUP
 431  *  \param  group  EC_GROUP the underlying EC_GROUP object
 432  *  \return newly created EC_POINT object or NULL if an error occurred
 433  */
 434 EC_POINT *EC_POINT_new(const EC_GROUP *group);
 435
 436 /** Frees a EC_POINT object
 437  *  \param  point  EC_POINT object to be freed
 438  */
 439 void EC_POINT_free(EC_POINT *point);
 440
 441 /** Clears and frees a EC_POINT object
 442  *  \param  point  EC_POINT object to be cleared and freed
 443  */
 444 void EC_POINT_clear_free(EC_POINT *point);
 445
 446 /** Copies EC_POINT object
 447  *  \param  dst  destination EC_POINT object
 448  *  \param  src  source EC_POINT object
 449  *  \return 1 on success and 0 if an error occurred
 450  */
 451 int EC_POINT_copy(EC_POINT *dst, const EC_POINT *src);
 452
 453 /** Creates a new EC_POINT object and copies the content of the supplied
 454  *  EC_POINT
 455  *  \param  src    source EC_POINT object
 456  *  \param  group  underlying the EC_GROUP object
 457  *  \return newly created EC_POINT object or NULL if an error occurred
 458  */
 459 EC_POINT *EC_POINT_dup(const EC_POINT *src, const EC_GROUP *group);
 460
 461 /** Returns the EC_METHOD used in EC_POINT object
 462  *  \param  point  EC_POINT object
 463  *  \return the EC_METHOD used
 464  */
 465 const EC_METHOD *EC_POINT_method_of(const EC_POINT *point);
 466
 467 /** Sets a point to infinity (neutral element)
 468  *  \param  group  underlying EC_GROUP object
 469  *  \param  point  EC_POINT to set to infinity
 470  *  \return 1 on success and 0 if an error occurred
 471  */
 472 int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point);
 473
 474 /** Sets the jacobian projective coordinates of a EC_POINT over GFp
 475  *  \param  group  underlying EC_GROUP object
 476  *  \param  p      EC_POINT object
 477  *  \param  x      BIGNUM with the x-coordinate
 478  *  \param  y      BIGNUM with the y-coordinate
 479  *  \param  z      BIGNUM with the z-coordinate
 480  *  \param  ctx    BN_CTX object (optional)
 481  *  \return 1 on success and 0 if an error occurred
 482  */
 483 int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group,
 484                                              EC_POINT *p, const BIGNUM *x,
 485                                              const BIGNUM *y, const BIGNUM *z,
 486                                              BN_CTX *ctx);
 487
 488 /** Gets the jacobian projective coordinates of a EC_POINT over GFp
 489  *  \param  group  underlying EC_GROUP object
 490  *  \param  p      EC_POINT object
 491  *  \param  x      BIGNUM for the x-coordinate
 492  *  \param  y      BIGNUM for the y-coordinate
 493  *  \param  z      BIGNUM for the z-coordinate
 494  *  \param  ctx    BN_CTX object (optional)
 495  *  \return 1 on success and 0 if an error occurred
 496  */
 497 int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group,
 498                                              const EC_POINT *p, BIGNUM *x,
 499                                              BIGNUM *y, BIGNUM *z,
 500                                              BN_CTX *ctx);
 501
 502 /** Sets the affine coordinates of an EC_POINT
 503  *  \param  group  underlying EC_GROUP object
 504  *  \param  p      EC_POINT object
 505  *  \param  x      BIGNUM with the x-coordinate
 506  *  \param  y      BIGNUM with the y-coordinate
 507  *  \param  ctx    BN_CTX object (optional)
 508  *  \return 1 on success and 0 if an error occurred
 509  */
 510 int EC_POINT_set_affine_coordinates(const EC_GROUP *group, EC_POINT *p,
 511                                     const BIGNUM *x, const BIGNUM *y,
 512                                     BN_CTX *ctx);
 513
 514 /** Gets the affine coordinates of an EC_POINT.
 515  *  \param  group  underlying EC_GROUP object
 516  *  \param  p      EC_POINT object
 517  *  \param  x      BIGNUM for the x-coordinate
 518  *  \param  y      BIGNUM for the y-coordinate
 519  *  \param  ctx    BN_CTX object (optional)
 520  *  \return 1 on success and 0 if an error occurred
 521  */
 522 int EC_POINT_get_affine_coordinates(const EC_GROUP *group, const EC_POINT *p,
 523                                     BIGNUM *x, BIGNUM *y, BN_CTX *ctx);
 524
 525 /** Sets the affine coordinates of an EC_POINT. A synonym of
 526  *  EC_POINT_set_affine_coordinates
 527  *  \param  group  underlying EC_GROUP object
 528  *  \param  p      EC_POINT object
 529  *  \param  x      BIGNUM with the x-coordinate
 530  *  \param  y      BIGNUM with the y-coordinate
 531  *  \param  ctx    BN_CTX object (optional)
 532  *  \return 1 on success and 0 if an error occurred
 533  */
 534 DEPRECATEDIN_3(int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group,
 535                                                        EC_POINT *p,
 536                                                        const BIGNUM *x,
 537                                                        const BIGNUM *y,
 538                                                        BN_CTX *ctx))
 539
 540 /** Gets the affine coordinates of an EC_POINT. A synonym of
 541  *  EC_POINT_get_affine_coordinates
 542  *  \param  group  underlying EC_GROUP object
 543  *  \param  p      EC_POINT object
 544  *  \param  x      BIGNUM for the x-coordinate
 545  *  \param  y      BIGNUM for the y-coordinate
 546  *  \param  ctx    BN_CTX object (optional)
 547  *  \return 1 on success and 0 if an error occurred
 548  */
 549 DEPRECATEDIN_3(int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group,
 550                                                        const EC_POINT *p,
 551                                                        BIGNUM *x,
 552                                                        BIGNUM *y,
 553                                                        BN_CTX *ctx))
 554
 555 /** Sets the x9.62 compressed coordinates of a EC_POINT
 556  *  \param  group  underlying EC_GROUP object
 557  *  \param  p      EC_POINT object
 558  *  \param  x      BIGNUM with x-coordinate
 559  *  \param  y_bit  integer with the y-Bit (either 0 or 1)
 560  *  \param  ctx    BN_CTX object (optional)
 561  *  \return 1 on success and 0 if an error occurred
 562  */
 563 int EC_POINT_set_compressed_coordinates(const EC_GROUP *group, EC_POINT *p,
 564                                         const BIGNUM *x, int y_bit,
 565                                         BN_CTX *ctx);
 566
 567 /** Sets the x9.62 compressed coordinates of a EC_POINT. A synonym of
 568  *  EC_POINT_set_compressed_coordinates
 569  *  \param  group  underlying EC_GROUP object
 570  *  \param  p      EC_POINT object
 571  *  \param  x      BIGNUM with x-coordinate
 572  *  \param  y_bit  integer with the y-Bit (either 0 or 1)
 573  *  \param  ctx    BN_CTX object (optional)
 574  *  \return 1 on success and 0 if an error occurred
 575  */
 576 DEPRECATEDIN_3(int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group,
 577                                                            EC_POINT *p,
 578                                                            const BIGNUM *x,
 579                                                            int y_bit,
 580                                                            BN_CTX *ctx))
 581 # ifndef OPENSSL_NO_EC2M
 582 /** Sets the affine coordinates of an EC_POINT. A synonym of
 583  *  EC_POINT_set_affine_coordinates
 584  *  \param  group  underlying EC_GROUP object
 585  *  \param  p      EC_POINT object
 586  *  \param  x      BIGNUM with the x-coordinate
 587  *  \param  y      BIGNUM with the y-coordinate
 588  *  \param  ctx    BN_CTX object (optional)
 589  *  \return 1 on success and 0 if an error occurred
 590  */
 591 DEPRECATEDIN_3(int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group,
 592                                                         EC_POINT *p,
 593                                                         const BIGNUM *x,
 594                                                         const BIGNUM *y,
 595                                                         BN_CTX *ctx))
 596
 597 /** Gets the affine coordinates of an EC_POINT. A synonym of
 598  *  EC_POINT_get_affine_coordinates
 599  *  \param  group  underlying EC_GROUP object
 600  *  \param  p      EC_POINT object
 601  *  \param  x      BIGNUM for the x-coordinate
 602  *  \param  y      BIGNUM for the y-coordinate
 603  *  \param  ctx    BN_CTX object (optional)
 604  *  \return 1 on success and 0 if an error occurred
 605  */
 606 DEPRECATEDIN_3(int EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *group,
 607                                                         const EC_POINT *p,
 608                                                         BIGNUM *x,
 609                                                         BIGNUM *y,
 610                                                         BN_CTX *ctx))
 611
 612 /** Sets the x9.62 compressed coordinates of a EC_POINT. A synonym of
 613  *  EC_POINT_set_compressed_coordinates
 614  *  \param  group  underlying EC_GROUP object
 615  *  \param  p      EC_POINT object
 616  *  \param  x      BIGNUM with x-coordinate
 617  *  \param  y_bit  integer with the y-Bit (either 0 or 1)
 618  *  \param  ctx    BN_CTX object (optional)
 619  *  \return 1 on success and 0 if an error occurred
 620  */
 621 DEPRECATEDIN_3(int EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *group,
 622                                                             EC_POINT *p,
 623                                                             const BIGNUM *x,
 624                                                             int y_bit,
 625                                                             BN_CTX *ctx))
 626 # endif
 627 /** Encodes a EC_POINT object to a octet string
 628  *  \param  group  underlying EC_GROUP object
 629  *  \param  p      EC_POINT object
 630  *  \param  form   point conversion form
 631  *  \param  buf    memory buffer for the result. If NULL the function returns
 632  *                 required buffer size.
 633  *  \param  len    length of the memory buffer
 634  *  \param  ctx    BN_CTX object (optional)
 635  *  \return the length of the encoded octet string or 0 if an error occurred
 636  */
 637 size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *p,
 638                           point_conversion_form_t form,
 639                           unsigned char *buf, size_t len, BN_CTX *ctx);
 640
 641 /** Decodes a EC_POINT from a octet string
 642  *  \param  group  underlying EC_GROUP object
 643  *  \param  p      EC_POINT object
 644  *  \param  buf    memory buffer with the encoded ec point
 645  *  \param  len    length of the encoded ec point
 646  *  \param  ctx    BN_CTX object (optional)
 647  *  \return 1 on success and 0 if an error occurred
 648  */
 649 int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *p,
 650                        const unsigned char *buf, size_t len, BN_CTX *ctx);
 651
 652 /** Encodes an EC_POINT object to an allocated octet string
 653  *  \param  group  underlying EC_GROUP object
 654  *  \param  point  EC_POINT object
 655  *  \param  form   point conversion form
 656  *  \param  pbuf   returns pointer to allocated buffer
 657  *  \param  ctx    BN_CTX object (optional)
 658  *  \return the length of the encoded octet string or 0 if an error occurred
 659  */
 660 size_t EC_POINT_point2buf(const EC_GROUP *group, const EC_POINT *point,
 661                           point_conversion_form_t form,
 662                           unsigned char **pbuf, BN_CTX *ctx);
 663
 664 /* other interfaces to point2oct/oct2point: */
 665 BIGNUM *EC_POINT_point2bn(const EC_GROUP *, const EC_POINT *,
 666                           point_conversion_form_t form, BIGNUM *, BN_CTX *);
 667 EC_POINT *EC_POINT_bn2point(const EC_GROUP *, const BIGNUM *,
 668                             EC_POINT *, BN_CTX *);
 669 char *EC_POINT_point2hex(const EC_GROUP *, const EC_POINT *,
 670                          point_conversion_form_t form, BN_CTX *);
 671 EC_POINT *EC_POINT_hex2point(const EC_GROUP *, const char *,
 672                              EC_POINT *, BN_CTX *);
 673
 674 /********************************************************************/
 675 /*         functions for doing EC_POINT arithmetic                  */
 676 /********************************************************************/
 677
 678 /** Computes the sum of two EC_POINT
 679  *  \param  group  underlying EC_GROUP object
 680  *  \param  r      EC_POINT object for the result (r = a + b)
 681  *  \param  a      EC_POINT object with the first summand
 682  *  \param  b      EC_POINT object with the second summand
 683  *  \param  ctx    BN_CTX object (optional)
 684  *  \return 1 on success and 0 if an error occurred
 685  */
 686 int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a,
 687                  const EC_POINT *b, BN_CTX *ctx);
 688
 689 /** Computes the double of a EC_POINT
 690  *  \param  group  underlying EC_GROUP object
 691  *  \param  r      EC_POINT object for the result (r = 2 * a)
 692  *  \param  a      EC_POINT object
 693  *  \param  ctx    BN_CTX object (optional)
 694  *  \return 1 on success and 0 if an error occurred
 695  */
 696 int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a,
 697                  BN_CTX *ctx);
 698
 699 /** Computes the inverse of a EC_POINT
 700  *  \param  group  underlying EC_GROUP object
 701  *  \param  a      EC_POINT object to be inverted (it's used for the result as well)
 702  *  \param  ctx    BN_CTX object (optional)
 703  *  \return 1 on success and 0 if an error occurred
 704  */
 705 int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx);
 706
 707 /** Checks whether the point is the neutral element of the group
 708  *  \param  group  the underlying EC_GROUP object
 709  *  \param  p      EC_POINT object
 710  *  \return 1 if the point is the neutral element and 0 otherwise
 711  */
 712 int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *p);
 713
 714 /** Checks whether the point is on the curve
 715  *  \param  group  underlying EC_GROUP object
 716  *  \param  point  EC_POINT object to check
 717  *  \param  ctx    BN_CTX object (optional)
 718  *  \return 1 if the point is on the curve, 0 if not, or -1 on error
 719  */
 720 int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point,
 721                          BN_CTX *ctx);
 722
 723 /** Compares two EC_POINTs
 724  *  \param  group  underlying EC_GROUP object
 725  *  \param  a      first EC_POINT object
 726  *  \param  b      second EC_POINT object
 727  *  \param  ctx    BN_CTX object (optional)
 728  *  \return 1 if the points are not equal, 0 if they are, or -1 on error
 729  */
 730 int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b,
 731                  BN_CTX *ctx);
 732
 733 int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx);
 734 int EC_POINTs_make_affine(const EC_GROUP *group, size_t num,
 735                           EC_POINT *points[], BN_CTX *ctx);
 736
 737 /** Computes r = generator * n + sum_{i=0}^{num-1} p[i] * m[i]
 738  *  \param  group  underlying EC_GROUP object
 739  *  \param  r      EC_POINT object for the result
 740  *  \param  n      BIGNUM with the multiplier for the group generator (optional)
 741  *  \param  num    number further summands
 742  *  \param  p      array of size num of EC_POINT objects
 743  *  \param  m      array of size num of BIGNUM objects
 744  *  \param  ctx    BN_CTX object (optional)
 745  *  \return 1 on success and 0 if an error occurred
 746  */
 747 int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *n,
 748                   size_t num, const EC_POINT *p[], const BIGNUM *m[],
 749                   BN_CTX *ctx);
 750
 751 /** Computes r = generator * n + q * m
 752  *  \param  group  underlying EC_GROUP object
 753  *  \param  r      EC_POINT object for the result
 754  *  \param  n      BIGNUM with the multiplier for the group generator (optional)
 755  *  \param  q      EC_POINT object with the first factor of the second summand
 756  *  \param  m      BIGNUM with the second factor of the second summand
 757  *  \param  ctx    BN_CTX object (optional)
 758  *  \return 1 on success and 0 if an error occurred
 759  */
 760 int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *n,
 761                  const EC_POINT *q, const BIGNUM *m, BN_CTX *ctx);
 762
 763 /** Stores multiples of generator for faster point multiplication
 764  *  \param  group  EC_GROUP object
 765  *  \param  ctx    BN_CTX object (optional)
 766  *  \return 1 on success and 0 if an error occurred
 767  */
 768 int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx);
 769
 770 /** Reports whether a precomputation has been done
 771  *  \param  group  EC_GROUP object
 772  *  \return 1 if a pre-computation has been done and 0 otherwise
 773  */
 774 int EC_GROUP_have_precompute_mult(const EC_GROUP *group);
 775
 776 /********************************************************************/
 777 /*                       ASN1 stuff                                 */
 778 /********************************************************************/
 779
 780 DECLARE_ASN1_ITEM(ECPKPARAMETERS)
 781 DECLARE_ASN1_ALLOC_FUNCTIONS(ECPKPARAMETERS)
 782 DECLARE_ASN1_ITEM(ECPARAMETERS)
 783 DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
 784
 785 /*
 786  * EC_GROUP_get_basis_type() returns the NID of the basis type used to
 787  * represent the field elements
 788  */
 789 int EC_GROUP_get_basis_type(const EC_GROUP *);
 790 # ifndef OPENSSL_NO_EC2M
 791 int EC_GROUP_get_trinomial_basis(const EC_GROUP *, unsigned int *k);
 792 int EC_GROUP_get_pentanomial_basis(const EC_GROUP *, unsigned int *k1,
 793                                    unsigned int *k2, unsigned int *k3);
 794 # endif
 795
 796 # define OPENSSL_EC_EXPLICIT_CURVE  0x000
 797 # define OPENSSL_EC_NAMED_CURVE     0x001
 798
 799 EC_GROUP *d2i_ECPKParameters(EC_GROUP **, const unsigned char **in, long len);
 800 int i2d_ECPKParameters(const EC_GROUP *, unsigned char **out);
 801
 802 # define d2i_ECPKParameters_bio(bp,x) ASN1_d2i_bio_of(EC_GROUP,NULL,d2i_ECPKParameters,bp,x)
 803 # define i2d_ECPKParameters_bio(bp,x) ASN1_i2d_bio_of_const(EC_GROUP,i2d_ECPKParameters,bp,x)
 804 # define d2i_ECPKParameters_fp(fp,x) (EC_GROUP *)ASN1_d2i_fp(NULL, \
 805                 (char *(*)())d2i_ECPKParameters,(fp),(unsigned char **)(x))
 806 # define i2d_ECPKParameters_fp(fp,x) ASN1_i2d_fp(i2d_ECPKParameters,(fp), \
 807                 (unsigned char *)(x))
 808
 809 int ECPKParameters_print(BIO *bp, const EC_GROUP *x, int off);
 810 # ifndef OPENSSL_NO_STDIO
 811 int ECPKParameters_print_fp(FILE *fp, const EC_GROUP *x, int off);
 812 # endif
 813
 814 /********************************************************************/
 815 /*                      EC_KEY functions                            */
 816 /********************************************************************/
 817
 818 /* some values for the encoding_flag */
 819 # define EC_PKEY_NO_PARAMETERS   0x001
 820 # define EC_PKEY_NO_PUBKEY       0x002
 821
 822 /* some values for the flags field */
 823 # define EC_FLAG_NON_FIPS_ALLOW  0x1
 824 # define EC_FLAG_FIPS_CHECKED    0x2
 825 # define EC_FLAG_COFACTOR_ECDH   0x1000
 826
 827 /** Creates a new EC_KEY object.
 828  *  \return EC_KEY object or NULL if an error occurred.
 829  */
 830 EC_KEY *EC_KEY_new(void);
 831
 832 int EC_KEY_get_flags(const EC_KEY *key);
 833
 834 void EC_KEY_set_flags(EC_KEY *key, int flags);
 835
 836 void EC_KEY_clear_flags(EC_KEY *key, int flags);
 837
 838 /** Creates a new EC_KEY object using a named curve as underlying
 839  *  EC_GROUP object.
 840  *  \param  nid  NID of the named curve.
 841  *  \return EC_KEY object or NULL if an error occurred.
 842  */
 843 EC_KEY *EC_KEY_new_by_curve_name(int nid);
 844
 845 /** Frees a EC_KEY object.
 846  *  \param  key  EC_KEY object to be freed.
 847  */
 848 void EC_KEY_free(EC_KEY *key);
 849
 850 /** Copies a EC_KEY object.
 851  *  \param  dst  destination EC_KEY object
 852  *  \param  src  src EC_KEY object
 853  *  \return dst or NULL if an error occurred.
 854  */
 855 EC_KEY *EC_KEY_copy(EC_KEY *dst, const EC_KEY *src);
 856
 857 /** Creates a new EC_KEY object and copies the content from src to it.
 858  *  \param  src  the source EC_KEY object
 859  *  \return newly created EC_KEY object or NULL if an error occurred.
 860  */
 861 EC_KEY *EC_KEY_dup(const EC_KEY *src);
 862
 863 /** Increases the internal reference count of a EC_KEY object.
 864  *  \param  key  EC_KEY object
 865  *  \return 1 on success and 0 if an error occurred.
 866  */
 867 int EC_KEY_up_ref(EC_KEY *key);
 868
 869 /** Returns the ENGINE object of a EC_KEY object
 870  *  \param  eckey  EC_KEY object
 871  *  \return the ENGINE object (possibly NULL).
 872  */
 873 ENGINE *EC_KEY_get0_engine(const EC_KEY *eckey);
 874
 875 /** Returns the EC_GROUP object of a EC_KEY object
 876  *  \param  key  EC_KEY object
 877  *  \return the EC_GROUP object (possibly NULL).
 878  */
 879 const EC_GROUP *EC_KEY_get0_group(const EC_KEY *key);
 880
 881 /** Sets the EC_GROUP of a EC_KEY object.
 882  *  \param  key    EC_KEY object
 883  *  \param  group  EC_GROUP to use in the EC_KEY object (note: the EC_KEY
 884  *                 object will use an own copy of the EC_GROUP).
 885  *  \return 1 on success and 0 if an error occurred.
 886  */
 887 int EC_KEY_set_group(EC_KEY *key, const EC_GROUP *group);
 888
 889 /** Returns the private key of a EC_KEY object.
 890  *  \param  key  EC_KEY object
 891  *  \return a BIGNUM with the private key (possibly NULL).
 892  */
 893 const BIGNUM *EC_KEY_get0_private_key(const EC_KEY *key);
 894
 895 /** Sets the private key of a EC_KEY object.
 896  *  \param  key  EC_KEY object
 897  *  \param  prv  BIGNUM with the private key (note: the EC_KEY object
 898  *               will use an own copy of the BIGNUM).
 899  *  \return 1 on success and 0 if an error occurred.
 900  */
 901 int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *prv);
 902
 903 /** Returns the public key of a EC_KEY object.
 904  *  \param  key  the EC_KEY object
 905  *  \return a EC_POINT object with the public key (possibly NULL)
 906  */
 907 const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *key);
 908
 909 /** Sets the public key of a EC_KEY object.
 910  *  \param  key  EC_KEY object
 911  *  \param  pub  EC_POINT object with the public key (note: the EC_KEY object
 912  *               will use an own copy of the EC_POINT object).
 913  *  \return 1 on success and 0 if an error occurred.
 914  */
 915 int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub);
 916
 917 unsigned EC_KEY_get_enc_flags(const EC_KEY *key);
 918 void EC_KEY_set_enc_flags(EC_KEY *eckey, unsigned int flags);
 919 point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key);
 920 void EC_KEY_set_conv_form(EC_KEY *eckey, point_conversion_form_t cform);
 921
 922 #define EC_KEY_get_ex_new_index(l, p, newf, dupf, freef) \
 923     CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_EC_KEY, l, p, newf, dupf, freef)
 924 int EC_KEY_set_ex_data(EC_KEY *key, int idx, void *arg);
 925 void *EC_KEY_get_ex_data(const EC_KEY *key, int idx);
 926
 927 /* wrapper functions for the underlying EC_GROUP object */
 928 void EC_KEY_set_asn1_flag(EC_KEY *eckey, int asn1_flag);
 929
 930 /** Creates a table of pre-computed multiples of the generator to
 931  *  accelerate further EC_KEY operations.
 932  *  \param  key  EC_KEY object
 933  *  \param  ctx  BN_CTX object (optional)
 934  *  \return 1 on success and 0 if an error occurred.
 935  */
 936 int EC_KEY_precompute_mult(EC_KEY *key, BN_CTX *ctx);
 937
 938 /** Creates a new ec private (and optional a new public) key.
 939  *  \param  key  EC_KEY object
 940  *  \return 1 on success and 0 if an error occurred.
 941  */
 942 int EC_KEY_generate_key(EC_KEY *key);
 943
 944 /** Verifies that a private and/or public key is valid.
 945  *  \param  key  the EC_KEY object
 946  *  \return 1 on success and 0 otherwise.
 947  */
 948 int EC_KEY_check_key(const EC_KEY *key);
 949
 950 /** Indicates if an EC_KEY can be used for signing.
 951  *  \param  eckey  the EC_KEY object
 952  *  \return 1 if can can sign and 0 otherwise.
 953  */
 954 int EC_KEY_can_sign(const EC_KEY *eckey);
 955
 956 /** Sets a public key from affine coordinates performing
 957  *  necessary NIST PKV tests.
 958  *  \param  key  the EC_KEY object
 959  *  \param  x    public key x coordinate
 960  *  \param  y    public key y coordinate
 961  *  \return 1 on success and 0 otherwise.
 962  */
 963 int EC_KEY_set_public_key_affine_coordinates(EC_KEY *key, BIGNUM *x,
 964                                              BIGNUM *y);
 965
 966 /** Encodes an EC_KEY public key to an allocated octet string
 967  *  \param  key    key to encode
 968  *  \param  form   point conversion form
 969  *  \param  pbuf   returns pointer to allocated buffer
 970  *  \param  ctx    BN_CTX object (optional)
 971  *  \return the length of the encoded octet string or 0 if an error occurred
 972  */
 973 size_t EC_KEY_key2buf(const EC_KEY *key, point_conversion_form_t form,
 974                       unsigned char **pbuf, BN_CTX *ctx);
 975
 976 /** Decodes a EC_KEY public key from a octet string
 977  *  \param  key    key to decode
 978  *  \param  buf    memory buffer with the encoded ec point
 979  *  \param  len    length of the encoded ec point
 980  *  \param  ctx    BN_CTX object (optional)
 981  *  \return 1 on success and 0 if an error occurred
 982  */
 983
 984 int EC_KEY_oct2key(EC_KEY *key, const unsigned char *buf, size_t len,
 985                    BN_CTX *ctx);
 986
 987 /** Decodes an EC_KEY private key from an octet string
 988  *  \param  key    key to decode
 989  *  \param  buf    memory buffer with the encoded private key
 990  *  \param  len    length of the encoded key
 991  *  \return 1 on success and 0 if an error occurred
 992  */
 993
 994 int EC_KEY_oct2priv(EC_KEY *key, const unsigned char *buf, size_t len);
 995
 996 /** Encodes a EC_KEY private key to an octet string
 997  *  \param  key    key to encode
 998  *  \param  buf    memory buffer for the result. If NULL the function returns
 999  *                 required buffer size.
1000  *  \param  len    length of the memory buffer
1001  *  \return the length of the encoded octet string or 0 if an error occurred
1002  */
1003
1004 size_t EC_KEY_priv2oct(const EC_KEY *key, unsigned char *buf, size_t len);
1005
1006 /** Encodes an EC_KEY private key to an allocated octet string
1007  *  \param  eckey  key to encode
1008  *  \param  pbuf   returns pointer to allocated buffer
1009  *  \return the length of the encoded octet string or 0 if an error occurred
1010  */
1011 size_t EC_KEY_priv2buf(const EC_KEY *eckey, unsigned char **pbuf);
1012
1013 /********************************************************************/
1014 /*        de- and encoding functions for SEC1 ECPrivateKey          */
1015 /********************************************************************/
1016
1017 /** Decodes a private key from a memory buffer.
1018  *  \param  key  a pointer to a EC_KEY object which should be used (or NULL)
1019  *  \param  in   pointer to memory with the DER encoded private key
1020  *  \param  len  length of the DER encoded private key
1021  *  \return the decoded private key or NULL if an error occurred.
1022  */
1023 EC_KEY *d2i_ECPrivateKey(EC_KEY **key, const unsigned char **in, long len);
1024
1025 /** Encodes a private key object and stores the result in a buffer.
1026  *  \param  key  the EC_KEY object to encode
1027  *  \param  out  the buffer for the result (if NULL the function returns number
1028  *               of bytes needed).
1029  *  \return 1 on success and 0 if an error occurred.
1030  */
1031 int i2d_ECPrivateKey(EC_KEY *key, unsigned char **out);
1032
1033 /********************************************************************/
1034 /*        de- and encoding functions for EC parameters              */
1035 /********************************************************************/
1036
1037 /** Decodes ec parameter from a memory buffer.
1038  *  \param  key  a pointer to a EC_KEY object which should be used (or NULL)
1039  *  \param  in   pointer to memory with the DER encoded ec parameters
1040  *  \param  len  length of the DER encoded ec parameters
1041  *  \return a EC_KEY object with the decoded parameters or NULL if an error
1042  *          occurred.
1043  */
1044 EC_KEY *d2i_ECParameters(EC_KEY **key, const unsigned char **in, long len);
1045
1046 /** Encodes ec parameter and stores the result in a buffer.
1047  *  \param  key  the EC_KEY object with ec parameters to encode
1048  *  \param  out  the buffer for the result (if NULL the function returns number
1049  *               of bytes needed).
1050  *  \return 1 on success and 0 if an error occurred.
1051  */
1052 int i2d_ECParameters(EC_KEY *key, unsigned char **out);
1053
1054 /********************************************************************/
1055 /*         de- and encoding functions for EC public key             */
1056 /*         (octet string, not DER -- hence 'o2i' and 'i2o')         */
1057 /********************************************************************/
1058
1059 /** Decodes a ec public key from a octet string.
1060  *  \param  key  a pointer to a EC_KEY object which should be used
1061  *  \param  in   memory buffer with the encoded public key
1062  *  \param  len  length of the encoded public key
1063  *  \return EC_KEY object with decoded public key or NULL if an error
1064  *          occurred.
1065  */
1066 EC_KEY *o2i_ECPublicKey(EC_KEY **key, const unsigned char **in, long len);
1067
1068 /** Encodes a ec public key in an octet string.
1069  *  \param  key  the EC_KEY object with the public key
1070  *  \param  out  the buffer for the result (if NULL the function returns number
1071  *               of bytes needed).
1072  *  \return 1 on success and 0 if an error occurred
1073  */
1074 int i2o_ECPublicKey(const EC_KEY *key, unsigned char **out);
1075
1076 /** Prints out the ec parameters on human readable form.
1077  *  \param  bp   BIO object to which the information is printed
1078  *  \param  key  EC_KEY object
1079  *  \return 1 on success and 0 if an error occurred
1080  */
1081 int ECParameters_print(BIO *bp, const EC_KEY *key);
1082
1083 /** Prints out the contents of a EC_KEY object
1084  *  \param  bp   BIO object to which the information is printed
1085  *  \param  key  EC_KEY object
1086  *  \param  off  line offset
1087  *  \return 1 on success and 0 if an error occurred
1088  */
1089 int EC_KEY_print(BIO *bp, const EC_KEY *key, int off);
1090
1091 # ifndef OPENSSL_NO_STDIO
1092 /** Prints out the ec parameters on human readable form.
1093  *  \param  fp   file descriptor to which the information is printed
1094  *  \param  key  EC_KEY object
1095  *  \return 1 on success and 0 if an error occurred
1096  */
1097 int ECParameters_print_fp(FILE *fp, const EC_KEY *key);
1098
1099 /** Prints out the contents of a EC_KEY object
1100  *  \param  fp   file descriptor to which the information is printed
1101  *  \param  key  EC_KEY object
1102  *  \param  off  line offset
1103  *  \return 1 on success and 0 if an error occurred
1104  */
1105 int EC_KEY_print_fp(FILE *fp, const EC_KEY *key, int off);
1106
1107 # endif
1108
1109 const EC_KEY_METHOD *EC_KEY_OpenSSL(void);
1110 const EC_KEY_METHOD *EC_KEY_get_default_method(void);
1111 void EC_KEY_set_default_method(const EC_KEY_METHOD *meth);
1112 const EC_KEY_METHOD *EC_KEY_get_method(const EC_KEY *key);
1113 int EC_KEY_set_method(EC_KEY *key, const EC_KEY_METHOD *meth);
1114 EC_KEY *EC_KEY_new_method(ENGINE *engine);
1115
1116 /** The old name for ecdh_KDF_X9_63
1117  *  The ECDH KDF specification has been mistakingly attributed to ANSI X9.62,
1118  *  it is actually specified in ANSI X9.63.
1119  *  This identifier is retained for backwards compatibility
1120  */
1121 DEPRECATEDIN_3(int ECDH_KDF_X9_62(unsigned char *out, size_t outlen,
1122                                   const unsigned char *Z, size_t Zlen,
1123                                   const unsigned char *sinfo, size_t sinfolen,
1124                                   const EVP_MD *md))
1125
1126 int ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
1127                      const EC_KEY *ecdh,
1128                      void *(*KDF) (const void *in, size_t inlen,
1129                                    void *out, size_t *outlen));
1130
1131 typedef struct ECDSA_SIG_st ECDSA_SIG;
1132
1133 /** Allocates and initialize a ECDSA_SIG structure
1134  *  \return pointer to a ECDSA_SIG structure or NULL if an error occurred
1135  */
1136 ECDSA_SIG *ECDSA_SIG_new(void);
1137
1138 /** frees a ECDSA_SIG structure
1139  *  \param  sig  pointer to the ECDSA_SIG structure
1140  */
1141 void ECDSA_SIG_free(ECDSA_SIG *sig);
1142
1143 /** DER encode content of ECDSA_SIG object (note: this function modifies *pp
1144  *  (*pp += length of the DER encoded signature)).
1145  *  \param  sig  pointer to the ECDSA_SIG object
1146  *  \param  pp   pointer to a unsigned char pointer for the output or NULL
1147  *  \return the length of the DER encoded ECDSA_SIG object or 0
1148  */
1149 int i2d_ECDSA_SIG(const ECDSA_SIG *sig, unsigned char **pp);
1150
1151 /** Decodes a DER encoded ECDSA signature (note: this function changes *pp
1152  *  (*pp += len)).
1153  *  \param  sig  pointer to ECDSA_SIG pointer (may be NULL)
1154  *  \param  pp   memory buffer with the DER encoded signature
1155  *  \param  len  length of the buffer
1156  *  \return pointer to the decoded ECDSA_SIG structure (or NULL)
1157  */
1158 ECDSA_SIG *d2i_ECDSA_SIG(ECDSA_SIG **sig, const unsigned char **pp, long len);
1159
1160 /** Accessor for r and s fields of ECDSA_SIG
1161  *  \param  sig  pointer to ECDSA_SIG structure
1162  *  \param  pr   pointer to BIGNUM pointer for r (may be NULL)
1163  *  \param  ps   pointer to BIGNUM pointer for s (may be NULL)
1164  */
1165 void ECDSA_SIG_get0(const ECDSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps);
1166
1167 /** Accessor for r field of ECDSA_SIG
1168  *  \param  sig  pointer to ECDSA_SIG structure
1169  */
1170 const BIGNUM *ECDSA_SIG_get0_r(const ECDSA_SIG *sig);
1171
1172 /** Accessor for s field of ECDSA_SIG
1173  *  \param  sig  pointer to ECDSA_SIG structure
1174  */
1175 const BIGNUM *ECDSA_SIG_get0_s(const ECDSA_SIG *sig);
1176
1177 /** Setter for r and s fields of ECDSA_SIG
1178  *  \param  sig  pointer to ECDSA_SIG structure
1179  *  \param  r    pointer to BIGNUM for r (may be NULL)
1180  *  \param  s    pointer to BIGNUM for s (may be NULL)
1181  */
1182 int ECDSA_SIG_set0(ECDSA_SIG *sig, BIGNUM *r, BIGNUM *s);
1183
1184 /** Computes the ECDSA signature of the given hash value using
1185  *  the supplied private key and returns the created signature.
1186  *  \param  dgst      pointer to the hash value
1187  *  \param  dgst_len  length of the hash value
1188  *  \param  eckey     EC_KEY object containing a private EC key
1189  *  \return pointer to a ECDSA_SIG structure or NULL if an error occurred
1190  */
1191 ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst, int dgst_len,
1192                          EC_KEY *eckey);
1193
1194 /** Computes ECDSA signature of a given hash value using the supplied
1195  *  private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
1196  *  \param  dgst     pointer to the hash value to sign
1197  *  \param  dgstlen  length of the hash value
1198  *  \param  kinv     BIGNUM with a pre-computed inverse k (optional)
1199  *  \param  rp       BIGNUM with a pre-computed rp value (optional),
1200  *                   see ECDSA_sign_setup
1201  *  \param  eckey    EC_KEY object containing a private EC key
1202  *  \return pointer to a ECDSA_SIG structure or NULL if an error occurred
1203  */
1204 ECDSA_SIG *ECDSA_do_sign_ex(const unsigned char *dgst, int dgstlen,
1205                             const BIGNUM *kinv, const BIGNUM *rp,
1206                             EC_KEY *eckey);
1207
1208 /** Verifies that the supplied signature is a valid ECDSA
1209  *  signature of the supplied hash value using the supplied public key.
1210  *  \param  dgst      pointer to the hash value
1211  *  \param  dgst_len  length of the hash value
1212  *  \param  sig       ECDSA_SIG structure
1213  *  \param  eckey     EC_KEY object containing a public EC key
1214  *  \return 1 if the signature is valid, 0 if the signature is invalid
1215  *          and -1 on error
1216  */
1217 int ECDSA_do_verify(const unsigned char *dgst, int dgst_len,
1218                     const ECDSA_SIG *sig, EC_KEY *eckey);
1219
1220 /** Precompute parts of the signing operation
1221  *  \param  eckey  EC_KEY object containing a private EC key
1222  *  \param  ctx    BN_CTX object (optional)
1223  *  \param  kinv   BIGNUM pointer for the inverse of k
1224  *  \param  rp     BIGNUM pointer for x coordinate of k * generator
1225  *  \return 1 on success and 0 otherwise
1226  */
1227 int ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx, BIGNUM **kinv, BIGNUM **rp);
1228
1229 /** Computes ECDSA signature of a given hash value using the supplied
1230  *  private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
1231  *  \param  type     this parameter is ignored
1232  *  \param  dgst     pointer to the hash value to sign
1233  *  \param  dgstlen  length of the hash value
1234  *  \param  sig      memory for the DER encoded created signature
1235  *  \param  siglen   pointer to the length of the returned signature
1236  *  \param  eckey    EC_KEY object containing a private EC key
1237  *  \return 1 on success and 0 otherwise
1238  */
1239 int ECDSA_sign(int type, const unsigned char *dgst, int dgstlen,
1240                unsigned char *sig, unsigned int *siglen, EC_KEY *eckey);
1241
1242 /** Computes ECDSA signature of a given hash value using the supplied
1243  *  private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
1244  *  \param  type     this parameter is ignored
1245  *  \param  dgst     pointer to the hash value to sign
1246  *  \param  dgstlen  length of the hash value
1247  *  \param  sig      buffer to hold the DER encoded signature
1248  *  \param  siglen   pointer to the length of the returned signature
1249  *  \param  kinv     BIGNUM with a pre-computed inverse k (optional)
1250  *  \param  rp       BIGNUM with a pre-computed rp value (optional),
1251  *                   see ECDSA_sign_setup
1252  *  \param  eckey    EC_KEY object containing a private EC key
1253  *  \return 1 on success and 0 otherwise
1254  */
1255 int ECDSA_sign_ex(int type, const unsigned char *dgst, int dgstlen,
1256                   unsigned char *sig, unsigned int *siglen,
1257                   const BIGNUM *kinv, const BIGNUM *rp, EC_KEY *eckey);
1258
1259 /** Verifies that the given signature is valid ECDSA signature
1260  *  of the supplied hash value using the specified public key.
1261  *  \param  type     this parameter is ignored
1262  *  \param  dgst     pointer to the hash value
1263  *  \param  dgstlen  length of the hash value
1264  *  \param  sig      pointer to the DER encoded signature
1265  *  \param  siglen   length of the DER encoded signature
1266  *  \param  eckey    EC_KEY object containing a public EC key
1267  *  \return 1 if the signature is valid, 0 if the signature is invalid
1268  *          and -1 on error
1269  */
1270 int ECDSA_verify(int type, const unsigned char *dgst, int dgstlen,
1271                  const unsigned char *sig, int siglen, EC_KEY *eckey);
1272
1273 /** Returns the maximum length of the DER encoded signature
1274  *  \param  eckey  EC_KEY object
1275  *  \return numbers of bytes required for the DER encoded signature
1276  */
1277 int ECDSA_size(const EC_KEY *eckey);
1278
1279 /********************************************************************/
1280 /*  EC_KEY_METHOD constructors, destructors, writers and accessors  */
1281 /********************************************************************/
1282
1283 EC_KEY_METHOD *EC_KEY_METHOD_new(const EC_KEY_METHOD *meth);
1284 void EC_KEY_METHOD_free(EC_KEY_METHOD *meth);
1285 void EC_KEY_METHOD_set_init(EC_KEY_METHOD *meth,
1286                             int (*init)(EC_KEY *key),
1287                             void (*finish)(EC_KEY *key),
1288                             int (*copy)(EC_KEY *dest, const EC_KEY *src),
1289                             int (*set_group)(EC_KEY *key, const EC_GROUP *grp),
1290                             int (*set_private)(EC_KEY *key,
1291                                                const BIGNUM *priv_key),
1292                             int (*set_public)(EC_KEY *key,
1293                                               const EC_POINT *pub_key));
1294
1295 void EC_KEY_METHOD_set_keygen(EC_KEY_METHOD *meth,
1296                               int (*keygen)(EC_KEY *key));
1297
1298 void EC_KEY_METHOD_set_compute_key(EC_KEY_METHOD *meth,
1299                                    int (*ckey)(unsigned char **psec,
1300                                                size_t *pseclen,
1301                                                const EC_POINT *pub_key,
1302                                                const EC_KEY *ecdh));
1303
1304 void EC_KEY_METHOD_set_sign(EC_KEY_METHOD *meth,
1305                             int (*sign)(int type, const unsigned char *dgst,
1306                                         int dlen, unsigned char *sig,
1307                                         unsigned int *siglen,
1308                                         const BIGNUM *kinv, const BIGNUM *r,
1309                                         EC_KEY *eckey),
1310                             int (*sign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
1311                                               BIGNUM **kinvp, BIGNUM **rp),
1312                             ECDSA_SIG *(*sign_sig)(const unsigned char *dgst,
1313                                                    int dgst_len,
1314                                                    const BIGNUM *in_kinv,
1315                                                    const BIGNUM *in_r,
1316                                                    EC_KEY *eckey));
1317
1318 void EC_KEY_METHOD_set_verify(EC_KEY_METHOD *meth,
1319                               int (*verify)(int type, const unsigned
1320                                             char *dgst, int dgst_len,
1321                                             const unsigned char *sigbuf,
1322                                             int sig_len, EC_KEY *eckey),
1323                               int (*verify_sig)(const unsigned char *dgst,
1324                                                 int dgst_len,
1325                                                 const ECDSA_SIG *sig,
1326                                                 EC_KEY *eckey));
1327
1328 void EC_KEY_METHOD_get_init(const EC_KEY_METHOD *meth,
1329                             int (**pinit)(EC_KEY *key),
1330                             void (**pfinish)(EC_KEY *key),
1331                             int (**pcopy)(EC_KEY *dest, const EC_KEY *src),
1332                             int (**pset_group)(EC_KEY *key,
1333                                                const EC_GROUP *grp),
1334                             int (**pset_private)(EC_KEY *key,
1335                                                  const BIGNUM *priv_key),
1336                             int (**pset_public)(EC_KEY *key,
1337                                                 const EC_POINT *pub_key));
1338
1339 void EC_KEY_METHOD_get_keygen(const EC_KEY_METHOD *meth,
1340                               int (**pkeygen)(EC_KEY *key));
1341
1342 void EC_KEY_METHOD_get_compute_key(const EC_KEY_METHOD *meth,
1343                                    int (**pck)(unsigned char **psec,
1344                                                size_t *pseclen,
1345                                                const EC_POINT *pub_key,
1346                                                const EC_KEY *ecdh));
1347
1348 void EC_KEY_METHOD_get_sign(const EC_KEY_METHOD *meth,
1349                             int (**psign)(int type, const unsigned char *dgst,
1350                                           int dlen, unsigned char *sig,
1351                                           unsigned int *siglen,
1352                                           const BIGNUM *kinv, const BIGNUM *r,
1353                                           EC_KEY *eckey),
1354                             int (**psign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
1355                                                 BIGNUM **kinvp, BIGNUM **rp),
1356                             ECDSA_SIG *(**psign_sig)(const unsigned char *dgst,
1357                                                      int dgst_len,
1358                                                      const BIGNUM *in_kinv,
1359                                                      const BIGNUM *in_r,
1360                                                      EC_KEY *eckey));
1361
1362 void EC_KEY_METHOD_get_verify(const EC_KEY_METHOD *meth,
1363                               int (**pverify)(int type, const unsigned
1364                                               char *dgst, int dgst_len,
1365                                               const unsigned char *sigbuf,
1366                                               int sig_len, EC_KEY *eckey),
1367                               int (**pverify_sig)(const unsigned char *dgst,
1368                                                   int dgst_len,
1369                                                   const ECDSA_SIG *sig,
1370                                                   EC_KEY *eckey));
1371
1372 # define ECParameters_dup(x) ASN1_dup_of(EC_KEY,i2d_ECParameters,d2i_ECParameters,x)
1373
1374 # ifndef __cplusplus
1375 #  if defined(__SUNPRO_C)
1376 #   if __SUNPRO_C >= 0x520
1377 #    pragma error_messages (default,E_ARRAY_OF_INCOMPLETE_NONAME,E_ARRAY_OF_INCOMPLETE)
1378 #   endif
1379 #  endif
1380 # endif
1381
1382 # define EVP_PKEY_CTX_set_ec_paramgen_curve_nid(ctx, nid) \
1383         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1384                                 EVP_PKEY_OP_PARAMGEN|EVP_PKEY_OP_KEYGEN, \
1385                                 EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID, nid, NULL)
1386
1387 # define EVP_PKEY_CTX_set_ec_param_enc(ctx, flag) \
1388         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1389                                 EVP_PKEY_OP_PARAMGEN|EVP_PKEY_OP_KEYGEN, \
1390                                 EVP_PKEY_CTRL_EC_PARAM_ENC, flag, NULL)
1391
1392 # define EVP_PKEY_CTX_set_ecdh_cofactor_mode(ctx, flag) \
1393         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1394                                 EVP_PKEY_OP_DERIVE, \
1395                                 EVP_PKEY_CTRL_EC_ECDH_COFACTOR, flag, NULL)
1396
1397 # define EVP_PKEY_CTX_get_ecdh_cofactor_mode(ctx) \
1398         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1399                                 EVP_PKEY_OP_DERIVE, \
1400                                 EVP_PKEY_CTRL_EC_ECDH_COFACTOR, -2, NULL)
1401
1402 # define EVP_PKEY_CTX_set_ecdh_kdf_type(ctx, kdf) \
1403         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1404                                 EVP_PKEY_OP_DERIVE, \
1405                                 EVP_PKEY_CTRL_EC_KDF_TYPE, kdf, NULL)
1406
1407 # define EVP_PKEY_CTX_get_ecdh_kdf_type(ctx) \
1408         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1409                                 EVP_PKEY_OP_DERIVE, \
1410                                 EVP_PKEY_CTRL_EC_KDF_TYPE, -2, NULL)
1411
1412 # define EVP_PKEY_CTX_set_ecdh_kdf_md(ctx, md) \
1413         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1414                                 EVP_PKEY_OP_DERIVE, \
1415                                 EVP_PKEY_CTRL_EC_KDF_MD, 0, (void *)(md))
1416
1417 # define EVP_PKEY_CTX_get_ecdh_kdf_md(ctx, pmd) \
1418         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1419                                 EVP_PKEY_OP_DERIVE, \
1420                                 EVP_PKEY_CTRL_GET_EC_KDF_MD, 0, (void *)(pmd))
1421
1422 # define EVP_PKEY_CTX_set_ecdh_kdf_outlen(ctx, len) \
1423         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1424                                 EVP_PKEY_OP_DERIVE, \
1425                                 EVP_PKEY_CTRL_EC_KDF_OUTLEN, len, NULL)
1426
1427 # define EVP_PKEY_CTX_get_ecdh_kdf_outlen(ctx, plen) \
1428         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1429                                 EVP_PKEY_OP_DERIVE, \
1430                                 EVP_PKEY_CTRL_GET_EC_KDF_OUTLEN, 0, \
1431                                 (void *)(plen))
1432
1433 # define EVP_PKEY_CTX_set0_ecdh_kdf_ukm(ctx, p, plen) \
1434         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1435                                 EVP_PKEY_OP_DERIVE, \
1436                                 EVP_PKEY_CTRL_EC_KDF_UKM, plen, (void *)(p))
1437
1438 # define EVP_PKEY_CTX_get0_ecdh_kdf_ukm(ctx, p) \
1439         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1440                                 EVP_PKEY_OP_DERIVE, \
1441                                 EVP_PKEY_CTRL_GET_EC_KDF_UKM, 0, (void *)(p))
1442
1443 /* SM2 will skip the operation check so no need to pass operation here */
1444 # define EVP_PKEY_CTX_set1_id(ctx, id, id_len) \
1445         EVP_PKEY_CTX_ctrl(ctx, -1, -1, \
1446                                 EVP_PKEY_CTRL_SET1_ID, (int)id_len, (void*)(id))
1447
1448 # define EVP_PKEY_CTX_get1_id(ctx, id) \
1449         EVP_PKEY_CTX_ctrl(ctx, -1, -1, \
1450                                 EVP_PKEY_CTRL_GET1_ID, 0, (void*)(id))
1451
1452 # define EVP_PKEY_CTX_get1_id_len(ctx, id_len) \
1453         EVP_PKEY_CTX_ctrl(ctx, -1, -1, \
1454                                 EVP_PKEY_CTRL_GET1_ID_LEN, 0, (void*)(id_len))
1455
1456 # define EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID             (EVP_PKEY_ALG_CTRL + 1)
1457 # define EVP_PKEY_CTRL_EC_PARAM_ENC                      (EVP_PKEY_ALG_CTRL + 2)
1458 # define EVP_PKEY_CTRL_EC_ECDH_COFACTOR                  (EVP_PKEY_ALG_CTRL + 3)
1459 # define EVP_PKEY_CTRL_EC_KDF_TYPE                       (EVP_PKEY_ALG_CTRL + 4)
1460 # define EVP_PKEY_CTRL_EC_KDF_MD                         (EVP_PKEY_ALG_CTRL + 5)
1461 # define EVP_PKEY_CTRL_GET_EC_KDF_MD                     (EVP_PKEY_ALG_CTRL + 6)
1462 # define EVP_PKEY_CTRL_EC_KDF_OUTLEN                     (EVP_PKEY_ALG_CTRL + 7)
1463 # define EVP_PKEY_CTRL_GET_EC_KDF_OUTLEN                 (EVP_PKEY_ALG_CTRL + 8)
1464 # define EVP_PKEY_CTRL_EC_KDF_UKM                        (EVP_PKEY_ALG_CTRL + 9)
1465 # define EVP_PKEY_CTRL_GET_EC_KDF_UKM                    (EVP_PKEY_ALG_CTRL + 10)
1466 # define EVP_PKEY_CTRL_SET1_ID                           (EVP_PKEY_ALG_CTRL + 11)
1467 # define EVP_PKEY_CTRL_GET1_ID                           (EVP_PKEY_ALG_CTRL + 12)
1468 # define EVP_PKEY_CTRL_GET1_ID_LEN                       (EVP_PKEY_ALG_CTRL + 13)
1469 /* KDF types */
1470 # define EVP_PKEY_ECDH_KDF_NONE                          1
1471 # define EVP_PKEY_ECDH_KDF_X9_63                         2
1472 /** The old name for EVP_PKEY_ECDH_KDF_X9_63
1473  *  The ECDH KDF specification has been mistakingly attributed to ANSI X9.62,
1474  *  it is actually specified in ANSI X9.63.
1475  *  This identifier is retained for backwards compatibility
1476  */
1477 # define EVP_PKEY_ECDH_KDF_X9_62   EVP_PKEY_ECDH_KDF_X9_63
1478
1479
1480 #  ifdef  __cplusplus
1481 }
1482 #  endif
1483 # endif
1484 #endif