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 OpenSSL license (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_COMPAT < 0x10100000L
  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 void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag);
 216 int EC_GROUP_get_asn1_flag(const EC_GROUP *group);
 217
 218 void EC_GROUP_set_point_conversion_form(EC_GROUP *group,
 219                                         point_conversion_form_t form);
 220 point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP *);
 221
 222 unsigned char *EC_GROUP_get0_seed(const EC_GROUP *x);
 223 size_t EC_GROUP_get_seed_len(const EC_GROUP *);
 224 size_t EC_GROUP_set_seed(EC_GROUP *, const unsigned char *, size_t len);
 225
 226 /** Sets the parameters of a ec curve defined by y^2 = x^3 + a*x + b (for GFp)
 227  *  or y^2 + x*y = x^3 + a*x^2 + b (for GF2m)
 228  *  \param  group  EC_GROUP object
 229  *  \param  p      BIGNUM with the prime number (GFp) or the polynomial
 230  *                 defining the underlying field (GF2m)
 231  *  \param  a      BIGNUM with parameter a of the equation
 232  *  \param  b      BIGNUM with parameter b of the equation
 233  *  \param  ctx    BN_CTX object (optional)
 234  *  \return 1 on success and 0 if an error occurred
 235  */
 236 int EC_GROUP_set_curve(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a,
 237                        const BIGNUM *b, BN_CTX *ctx);
 238
 239 /** Gets the parameters of the ec curve defined by y^2 = x^3 + a*x + b (for GFp)
 240  *  or y^2 + x*y = x^3 + a*x^2 + b (for GF2m)
 241  *  \param  group  EC_GROUP object
 242  *  \param  p      BIGNUM with the prime number (GFp) or the polynomial
 243  *                 defining the underlying field (GF2m)
 244  *  \param  a      BIGNUM for parameter a of the equation
 245  *  \param  b      BIGNUM for parameter b of the equation
 246  *  \param  ctx    BN_CTX object (optional)
 247  *  \return 1 on success and 0 if an error occurred
 248  */
 249 int EC_GROUP_get_curve(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b,
 250                        BN_CTX *ctx);
 251
 252 /** Sets the parameters of an ec curve. Synonym for EC_GROUP_set_curve
 253  *  \param  group  EC_GROUP object
 254  *  \param  p      BIGNUM with the prime number (GFp) or the polynomial
 255  *                 defining the underlying field (GF2m)
 256  *  \param  a      BIGNUM with parameter a of the equation
 257  *  \param  b      BIGNUM with parameter b of the equation
 258  *  \param  ctx    BN_CTX object (optional)
 259  *  \return 1 on success and 0 if an error occurred
 260  */
 261 DEPRECATEDIN_3(int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p,
 262                                           const BIGNUM *a, const BIGNUM *b,
 263                                           BN_CTX *ctx))
 264
 265 /** Gets the parameters of an ec curve. Synonym for EC_GROUP_get_curve
 266  *  \param  group  EC_GROUP object
 267  *  \param  p      BIGNUM with the prime number (GFp) or the polynomial
 268  *                 defining the underlying field (GF2m)
 269  *  \param  a      BIGNUM for parameter a of the equation
 270  *  \param  b      BIGNUM for parameter b of the equation
 271  *  \param  ctx    BN_CTX object (optional)
 272  *  \return 1 on success and 0 if an error occurred
 273  */
 274 DEPRECATEDIN_3(int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p,
 275                                           BIGNUM *a, BIGNUM *b,
 276                                           BN_CTX *ctx))
 277
 278 # ifndef OPENSSL_NO_EC2M
 279 /** Sets the parameter of an ec curve. Synonym for EC_GROUP_set_curve
 280  *  \param  group  EC_GROUP object
 281  *  \param  p      BIGNUM with the prime number (GFp) or the polynomial
 282  *                 defining the underlying field (GF2m)
 283  *  \param  a      BIGNUM with parameter a of the equation
 284  *  \param  b      BIGNUM with parameter b of the equation
 285  *  \param  ctx    BN_CTX object (optional)
 286  *  \return 1 on success and 0 if an error occurred
 287  */
 288 DEPRECATEDIN_3(int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p,
 289                                            const BIGNUM *a, const BIGNUM *b,
 290                                            BN_CTX *ctx))
 291
 292 /** Gets the parameters of an ec curve. Synonym for EC_GROUP_get_curve
 293  *  \param  group  EC_GROUP object
 294  *  \param  p      BIGNUM with the prime number (GFp) or the polynomial
 295  *                 defining the underlying field (GF2m)
 296  *  \param  a      BIGNUM for parameter a of the equation
 297  *  \param  b      BIGNUM for parameter b of the equation
 298  *  \param  ctx    BN_CTX object (optional)
 299  *  \return 1 on success and 0 if an error occurred
 300  */
 301 DEPRECATEDIN_3(int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p,
 302                                            BIGNUM *a, BIGNUM *b,
 303                                            BN_CTX *ctx))
 304 # endif
 305 /** Returns the number of bits needed to represent a field element
 306  *  \param  group  EC_GROUP object
 307  *  \return number of bits needed to represent a field element
 308  */
 309 int EC_GROUP_get_degree(const EC_GROUP *group);
 310
 311 /** Checks whether the parameter in the EC_GROUP define a valid ec group
 312  *  \param  group  EC_GROUP object
 313  *  \param  ctx    BN_CTX object (optional)
 314  *  \return 1 if group is a valid ec group and 0 otherwise
 315  */
 316 int EC_GROUP_check(const EC_GROUP *group, BN_CTX *ctx);
 317
 318 /** Checks whether the discriminant of the elliptic curve is zero or not
 319  *  \param  group  EC_GROUP object
 320  *  \param  ctx    BN_CTX object (optional)
 321  *  \return 1 if the discriminant is not zero and 0 otherwise
 322  */
 323 int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx);
 324
 325 /** Compares two EC_GROUP objects
 326  *  \param  a    first EC_GROUP object
 327  *  \param  b    second EC_GROUP object
 328  *  \param  ctx  BN_CTX object (optional)
 329  *  \return 0 if the groups are equal, 1 if not, or -1 on error
 330  */
 331 int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx);
 332
 333 /*
 334  * EC_GROUP_new_GF*() calls EC_GROUP_new() and EC_GROUP_set_GF*() after
 335  * choosing an appropriate EC_METHOD
 336  */
 337
 338 /** Creates a new EC_GROUP object with the specified parameters defined
 339  *  over GFp (defined by the equation y^2 = x^3 + a*x + b)
 340  *  \param  p    BIGNUM with the prime number
 341  *  \param  a    BIGNUM with the parameter a of the equation
 342  *  \param  b    BIGNUM with the parameter b of the equation
 343  *  \param  ctx  BN_CTX object (optional)
 344  *  \return newly created EC_GROUP object with the specified parameters
 345  */
 346 EC_GROUP *EC_GROUP_new_curve_GFp(const BIGNUM *p, const BIGNUM *a,
 347                                  const BIGNUM *b, BN_CTX *ctx);
 348 # ifndef OPENSSL_NO_EC2M
 349 /** Creates a new EC_GROUP object with the specified parameters defined
 350  *  over GF2m (defined by the equation y^2 + x*y = x^3 + a*x^2 + b)
 351  *  \param  p    BIGNUM with the polynomial defining the underlying field
 352  *  \param  a    BIGNUM with the parameter a of the equation
 353  *  \param  b    BIGNUM with the parameter b of the equation
 354  *  \param  ctx  BN_CTX object (optional)
 355  *  \return newly created EC_GROUP object with the specified parameters
 356  */
 357 EC_GROUP *EC_GROUP_new_curve_GF2m(const BIGNUM *p, const BIGNUM *a,
 358                                   const BIGNUM *b, BN_CTX *ctx);
 359 # endif
 360
 361 /** Creates a EC_GROUP object with a curve specified by a NID
 362  *  \param  nid  NID of the OID of the curve name
 363  *  \return newly created EC_GROUP object with specified curve or NULL
 364  *          if an error occurred
 365  */
 366 EC_GROUP *EC_GROUP_new_by_curve_name(int nid);
 367
 368 /** Creates a new EC_GROUP object from an ECPARAMETERS object
 369  *  \param  params  pointer to the ECPARAMETERS object
 370  *  \return newly created EC_GROUP object with specified curve or NULL
 371  *          if an error occurred
 372  */
 373 EC_GROUP *EC_GROUP_new_from_ecparameters(const ECPARAMETERS *params);
 374
 375 /** Creates an ECPARAMETERS object for the given EC_GROUP object.
 376  *  \param  group   pointer to the EC_GROUP object
 377  *  \param  params  pointer to an existing ECPARAMETERS object or NULL
 378  *  \return pointer to the new ECPARAMETERS object or NULL
 379  *          if an error occurred.
 380  */
 381 ECPARAMETERS *EC_GROUP_get_ecparameters(const EC_GROUP *group,
 382                                         ECPARAMETERS *params);
 383
 384 /** Creates a new EC_GROUP object from an ECPKPARAMETERS object
 385  *  \param  params  pointer to an existing ECPKPARAMETERS object, or NULL
 386  *  \return newly created EC_GROUP object with specified curve, or NULL
 387  *          if an error occurred
 388  */
 389 EC_GROUP *EC_GROUP_new_from_ecpkparameters(const ECPKPARAMETERS *params);
 390
 391 /** Creates an ECPKPARAMETERS object for the given EC_GROUP object.
 392  *  \param  group   pointer to the EC_GROUP object
 393  *  \param  params  pointer to an existing ECPKPARAMETERS object or NULL
 394  *  \return pointer to the new ECPKPARAMETERS object or NULL
 395  *          if an error occurred.
 396  */
 397 ECPKPARAMETERS *EC_GROUP_get_ecpkparameters(const EC_GROUP *group,
 398                                             ECPKPARAMETERS *params);
 399
 400 /********************************************************************/
 401 /*               handling of internal curves                        */
 402 /********************************************************************/
 403
 404 typedef struct {
 405     int nid;
 406     const char *comment;
 407 } EC_builtin_curve;
 408
 409 /*
 410  * EC_builtin_curves(EC_builtin_curve *r, size_t size) returns number of all
 411  * available curves or zero if a error occurred. In case r is not zero,
 412  * nitems EC_builtin_curve structures are filled with the data of the first
 413  * nitems internal groups
 414  */
 415 size_t EC_get_builtin_curves(EC_builtin_curve *r, size_t nitems);
 416
 417 const char *EC_curve_nid2nist(int nid);
 418 int EC_curve_nist2nid(const char *name);
 419
 420 /********************************************************************/
 421 /*                    EC_POINT functions                            */
 422 /********************************************************************/
 423
 424 /** Creates a new EC_POINT object for the specified EC_GROUP
 425  *  \param  group  EC_GROUP the underlying EC_GROUP object
 426  *  \return newly created EC_POINT object or NULL if an error occurred
 427  */
 428 EC_POINT *EC_POINT_new(const EC_GROUP *group);
 429
 430 /** Frees a EC_POINT object
 431  *  \param  point  EC_POINT object to be freed
 432  */
 433 void EC_POINT_free(EC_POINT *point);
 434
 435 /** Clears and frees a EC_POINT object
 436  *  \param  point  EC_POINT object to be cleared and freed
 437  */
 438 void EC_POINT_clear_free(EC_POINT *point);
 439
 440 /** Copies EC_POINT object
 441  *  \param  dst  destination EC_POINT object
 442  *  \param  src  source EC_POINT object
 443  *  \return 1 on success and 0 if an error occurred
 444  */
 445 int EC_POINT_copy(EC_POINT *dst, const EC_POINT *src);
 446
 447 /** Creates a new EC_POINT object and copies the content of the supplied
 448  *  EC_POINT
 449  *  \param  src    source EC_POINT object
 450  *  \param  group  underlying the EC_GROUP object
 451  *  \return newly created EC_POINT object or NULL if an error occurred
 452  */
 453 EC_POINT *EC_POINT_dup(const EC_POINT *src, const EC_GROUP *group);
 454
 455 /** Returns the EC_METHOD used in EC_POINT object
 456  *  \param  point  EC_POINT object
 457  *  \return the EC_METHOD used
 458  */
 459 const EC_METHOD *EC_POINT_method_of(const EC_POINT *point);
 460
 461 /** Sets a point to infinity (neutral element)
 462  *  \param  group  underlying EC_GROUP object
 463  *  \param  point  EC_POINT to set to infinity
 464  *  \return 1 on success and 0 if an error occurred
 465  */
 466 int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point);
 467
 468 /** Sets the jacobian projective coordinates of a EC_POINT over GFp
 469  *  \param  group  underlying EC_GROUP object
 470  *  \param  p      EC_POINT object
 471  *  \param  x      BIGNUM with the x-coordinate
 472  *  \param  y      BIGNUM with the y-coordinate
 473  *  \param  z      BIGNUM with the z-coordinate
 474  *  \param  ctx    BN_CTX object (optional)
 475  *  \return 1 on success and 0 if an error occurred
 476  */
 477 int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group,
 478                                              EC_POINT *p, const BIGNUM *x,
 479                                              const BIGNUM *y, const BIGNUM *z,
 480                                              BN_CTX *ctx);
 481
 482 /** Gets the jacobian projective coordinates of a EC_POINT over GFp
 483  *  \param  group  underlying EC_GROUP object
 484  *  \param  p      EC_POINT object
 485  *  \param  x      BIGNUM for the x-coordinate
 486  *  \param  y      BIGNUM for the y-coordinate
 487  *  \param  z      BIGNUM for the z-coordinate
 488  *  \param  ctx    BN_CTX object (optional)
 489  *  \return 1 on success and 0 if an error occurred
 490  */
 491 int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group,
 492                                              const EC_POINT *p, BIGNUM *x,
 493                                              BIGNUM *y, BIGNUM *z,
 494                                              BN_CTX *ctx);
 495
 496 /** Sets the affine coordinates of an EC_POINT
 497  *  \param  group  underlying EC_GROUP object
 498  *  \param  p      EC_POINT object
 499  *  \param  x      BIGNUM with the x-coordinate
 500  *  \param  y      BIGNUM with the y-coordinate
 501  *  \param  ctx    BN_CTX object (optional)
 502  *  \return 1 on success and 0 if an error occurred
 503  */
 504 int EC_POINT_set_affine_coordinates(const EC_GROUP *group, EC_POINT *p,
 505                                     const BIGNUM *x, const BIGNUM *y,
 506                                     BN_CTX *ctx);
 507
 508 /** Gets the affine coordinates of an EC_POINT.
 509  *  \param  group  underlying EC_GROUP object
 510  *  \param  p      EC_POINT object
 511  *  \param  x      BIGNUM for the x-coordinate
 512  *  \param  y      BIGNUM for the y-coordinate
 513  *  \param  ctx    BN_CTX object (optional)
 514  *  \return 1 on success and 0 if an error occurred
 515  */
 516 int EC_POINT_get_affine_coordinates(const EC_GROUP *group, const EC_POINT *p,
 517                                     BIGNUM *x, BIGNUM *y, BN_CTX *ctx);
 518
 519 /** Sets the affine coordinates of an EC_POINT. A synonym of
 520  *  EC_POINT_set_affine_coordinates
 521  *  \param  group  underlying EC_GROUP object
 522  *  \param  p      EC_POINT object
 523  *  \param  x      BIGNUM with the x-coordinate
 524  *  \param  y      BIGNUM with the y-coordinate
 525  *  \param  ctx    BN_CTX object (optional)
 526  *  \return 1 on success and 0 if an error occurred
 527  */
 528 DEPRECATEDIN_3(int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group,
 529                                                        EC_POINT *p,
 530                                                        const BIGNUM *x,
 531                                                        const BIGNUM *y,
 532                                                        BN_CTX *ctx))
 533
 534 /** Gets the affine coordinates of an EC_POINT. A synonym of
 535  *  EC_POINT_get_affine_coordinates
 536  *  \param  group  underlying EC_GROUP object
 537  *  \param  p      EC_POINT object
 538  *  \param  x      BIGNUM for the x-coordinate
 539  *  \param  y      BIGNUM for the y-coordinate
 540  *  \param  ctx    BN_CTX object (optional)
 541  *  \return 1 on success and 0 if an error occurred
 542  */
 543 DEPRECATEDIN_3(int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group,
 544                                                        const EC_POINT *p,
 545                                                        BIGNUM *x,
 546                                                        BIGNUM *y,
 547                                                        BN_CTX *ctx))
 548
 549 /** Sets the x9.62 compressed coordinates of a EC_POINT
 550  *  \param  group  underlying EC_GROUP object
 551  *  \param  p      EC_POINT object
 552  *  \param  x      BIGNUM with x-coordinate
 553  *  \param  y_bit  integer with the y-Bit (either 0 or 1)
 554  *  \param  ctx    BN_CTX object (optional)
 555  *  \return 1 on success and 0 if an error occurred
 556  */
 557 int EC_POINT_set_compressed_coordinates(const EC_GROUP *group, EC_POINT *p,
 558                                         const BIGNUM *x, int y_bit,
 559                                         BN_CTX *ctx);
 560
 561 /** Sets the x9.62 compressed coordinates of a EC_POINT. A synonym of
 562  *  EC_POINT_set_compressed_coordinates
 563  *  \param  group  underlying EC_GROUP object
 564  *  \param  p      EC_POINT object
 565  *  \param  x      BIGNUM with x-coordinate
 566  *  \param  y_bit  integer with the y-Bit (either 0 or 1)
 567  *  \param  ctx    BN_CTX object (optional)
 568  *  \return 1 on success and 0 if an error occurred
 569  */
 570 DEPRECATEDIN_3(int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group,
 571                                                            EC_POINT *p,
 572                                                            const BIGNUM *x,
 573                                                            int y_bit,
 574                                                            BN_CTX *ctx))
 575 # ifndef OPENSSL_NO_EC2M
 576 /** Sets the affine coordinates of an EC_POINT. A synonym of
 577  *  EC_POINT_set_affine_coordinates
 578  *  \param  group  underlying EC_GROUP object
 579  *  \param  p      EC_POINT object
 580  *  \param  x      BIGNUM with the x-coordinate
 581  *  \param  y      BIGNUM with the y-coordinate
 582  *  \param  ctx    BN_CTX object (optional)
 583  *  \return 1 on success and 0 if an error occurred
 584  */
 585 DEPRECATEDIN_3(int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group,
 586                                                         EC_POINT *p,
 587                                                         const BIGNUM *x,
 588                                                         const BIGNUM *y,
 589                                                         BN_CTX *ctx))
 590
 591 /** Gets the affine coordinates of an EC_POINT. A synonym of
 592  *  EC_POINT_get_affine_coordinates
 593  *  \param  group  underlying EC_GROUP object
 594  *  \param  p      EC_POINT object
 595  *  \param  x      BIGNUM for the x-coordinate
 596  *  \param  y      BIGNUM for the y-coordinate
 597  *  \param  ctx    BN_CTX object (optional)
 598  *  \return 1 on success and 0 if an error occurred
 599  */
 600 DEPRECATEDIN_3(int EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *group,
 601                                                         const EC_POINT *p,
 602                                                         BIGNUM *x,
 603                                                         BIGNUM *y,
 604                                                         BN_CTX *ctx))
 605
 606 /** Sets the x9.62 compressed coordinates of a EC_POINT. A synonym of
 607  *  EC_POINT_set_compressed_coordinates
 608  *  \param  group  underlying EC_GROUP object
 609  *  \param  p      EC_POINT object
 610  *  \param  x      BIGNUM with x-coordinate
 611  *  \param  y_bit  integer with the y-Bit (either 0 or 1)
 612  *  \param  ctx    BN_CTX object (optional)
 613  *  \return 1 on success and 0 if an error occurred
 614  */
 615 DEPRECATEDIN_3(int EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *group,
 616                                                             EC_POINT *p,
 617                                                             const BIGNUM *x,
 618                                                             int y_bit,
 619                                                             BN_CTX *ctx))
 620 # endif
 621 /** Encodes a EC_POINT object to a octet string
 622  *  \param  group  underlying EC_GROUP object
 623  *  \param  p      EC_POINT object
 624  *  \param  form   point conversion form
 625  *  \param  buf    memory buffer for the result. If NULL the function returns
 626  *                 required buffer size.
 627  *  \param  len    length of the memory buffer
 628  *  \param  ctx    BN_CTX object (optional)
 629  *  \return the length of the encoded octet string or 0 if an error occurred
 630  */
 631 size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *p,
 632                           point_conversion_form_t form,
 633                           unsigned char *buf, size_t len, BN_CTX *ctx);
 634
 635 /** Decodes a EC_POINT from a octet string
 636  *  \param  group  underlying EC_GROUP object
 637  *  \param  p      EC_POINT object
 638  *  \param  buf    memory buffer with the encoded ec point
 639  *  \param  len    length of the encoded ec point
 640  *  \param  ctx    BN_CTX object (optional)
 641  *  \return 1 on success and 0 if an error occurred
 642  */
 643 int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *p,
 644                        const unsigned char *buf, size_t len, BN_CTX *ctx);
 645
 646 /** Encodes an EC_POINT object to an allocated octet string
 647  *  \param  group  underlying EC_GROUP object
 648  *  \param  point  EC_POINT object
 649  *  \param  form   point conversion form
 650  *  \param  pbuf   returns pointer to allocated buffer
 651  *  \param  ctx    BN_CTX object (optional)
 652  *  \return the length of the encoded octet string or 0 if an error occurred
 653  */
 654 size_t EC_POINT_point2buf(const EC_GROUP *group, const EC_POINT *point,
 655                           point_conversion_form_t form,
 656                           unsigned char **pbuf, BN_CTX *ctx);
 657
 658 /* other interfaces to point2oct/oct2point: */
 659 BIGNUM *EC_POINT_point2bn(const EC_GROUP *, const EC_POINT *,
 660                           point_conversion_form_t form, BIGNUM *, BN_CTX *);
 661 EC_POINT *EC_POINT_bn2point(const EC_GROUP *, const BIGNUM *,
 662                             EC_POINT *, BN_CTX *);
 663 char *EC_POINT_point2hex(const EC_GROUP *, const EC_POINT *,
 664                          point_conversion_form_t form, BN_CTX *);
 665 EC_POINT *EC_POINT_hex2point(const EC_GROUP *, const char *,
 666                              EC_POINT *, BN_CTX *);
 667
 668 /********************************************************************/
 669 /*         functions for doing EC_POINT arithmetic                  */
 670 /********************************************************************/
 671
 672 /** Computes the sum of two EC_POINT
 673  *  \param  group  underlying EC_GROUP object
 674  *  \param  r      EC_POINT object for the result (r = a + b)
 675  *  \param  a      EC_POINT object with the first summand
 676  *  \param  b      EC_POINT object with the second summand
 677  *  \param  ctx    BN_CTX object (optional)
 678  *  \return 1 on success and 0 if an error occurred
 679  */
 680 int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a,
 681                  const EC_POINT *b, BN_CTX *ctx);
 682
 683 /** Computes the double of a EC_POINT
 684  *  \param  group  underlying EC_GROUP object
 685  *  \param  r      EC_POINT object for the result (r = 2 * a)
 686  *  \param  a      EC_POINT object
 687  *  \param  ctx    BN_CTX object (optional)
 688  *  \return 1 on success and 0 if an error occurred
 689  */
 690 int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a,
 691                  BN_CTX *ctx);
 692
 693 /** Computes the inverse of a EC_POINT
 694  *  \param  group  underlying EC_GROUP object
 695  *  \param  a      EC_POINT object to be inverted (it's used for the result as well)
 696  *  \param  ctx    BN_CTX object (optional)
 697  *  \return 1 on success and 0 if an error occurred
 698  */
 699 int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx);
 700
 701 /** Checks whether the point is the neutral element of the group
 702  *  \param  group  the underlying EC_GROUP object
 703  *  \param  p      EC_POINT object
 704  *  \return 1 if the point is the neutral element and 0 otherwise
 705  */
 706 int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *p);
 707
 708 /** Checks whether the point is on the curve
 709  *  \param  group  underlying EC_GROUP object
 710  *  \param  point  EC_POINT object to check
 711  *  \param  ctx    BN_CTX object (optional)
 712  *  \return 1 if the point is on the curve, 0 if not, or -1 on error
 713  */
 714 int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point,
 715                          BN_CTX *ctx);
 716
 717 /** Compares two EC_POINTs
 718  *  \param  group  underlying EC_GROUP object
 719  *  \param  a      first EC_POINT object
 720  *  \param  b      second EC_POINT object
 721  *  \param  ctx    BN_CTX object (optional)
 722  *  \return 1 if the points are not equal, 0 if they are, or -1 on error
 723  */
 724 int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b,
 725                  BN_CTX *ctx);
 726
 727 int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx);
 728 int EC_POINTs_make_affine(const EC_GROUP *group, size_t num,
 729                           EC_POINT *points[], BN_CTX *ctx);
 730
 731 /** Computes r = generator * n + sum_{i=0}^{num-1} p[i] * m[i]
 732  *  \param  group  underlying EC_GROUP object
 733  *  \param  r      EC_POINT object for the result
 734  *  \param  n      BIGNUM with the multiplier for the group generator (optional)
 735  *  \param  num    number further summands
 736  *  \param  p      array of size num of EC_POINT objects
 737  *  \param  m      array of size num of BIGNUM objects
 738  *  \param  ctx    BN_CTX object (optional)
 739  *  \return 1 on success and 0 if an error occurred
 740  */
 741 int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *n,
 742                   size_t num, const EC_POINT *p[], const BIGNUM *m[],
 743                   BN_CTX *ctx);
 744
 745 /** Computes r = generator * n + q * m
 746  *  \param  group  underlying EC_GROUP object
 747  *  \param  r      EC_POINT object for the result
 748  *  \param  n      BIGNUM with the multiplier for the group generator (optional)
 749  *  \param  q      EC_POINT object with the first factor of the second summand
 750  *  \param  m      BIGNUM with the second factor of the second summand
 751  *  \param  ctx    BN_CTX object (optional)
 752  *  \return 1 on success and 0 if an error occurred
 753  */
 754 int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *n,
 755                  const EC_POINT *q, const BIGNUM *m, BN_CTX *ctx);
 756
 757 /** Stores multiples of generator for faster point multiplication
 758  *  \param  group  EC_GROUP object
 759  *  \param  ctx    BN_CTX object (optional)
 760  *  \return 1 on success and 0 if an error occurred
 761  */
 762 int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx);
 763
 764 /** Reports whether a precomputation has been done
 765  *  \param  group  EC_GROUP object
 766  *  \return 1 if a pre-computation has been done and 0 otherwise
 767  */
 768 int EC_GROUP_have_precompute_mult(const EC_GROUP *group);
 769
 770 /********************************************************************/
 771 /*                       ASN1 stuff                                 */
 772 /********************************************************************/
 773
 774 DECLARE_ASN1_ITEM(ECPKPARAMETERS)
 775 DECLARE_ASN1_ALLOC_FUNCTIONS(ECPKPARAMETERS)
 776 DECLARE_ASN1_ITEM(ECPARAMETERS)
 777 DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
 778
 779 /*
 780  * EC_GROUP_get_basis_type() returns the NID of the basis type used to
 781  * represent the field elements
 782  */
 783 int EC_GROUP_get_basis_type(const EC_GROUP *);
 784 # ifndef OPENSSL_NO_EC2M
 785 int EC_GROUP_get_trinomial_basis(const EC_GROUP *, unsigned int *k);
 786 int EC_GROUP_get_pentanomial_basis(const EC_GROUP *, unsigned int *k1,
 787                                    unsigned int *k2, unsigned int *k3);
 788 # endif
 789
 790 # define OPENSSL_EC_EXPLICIT_CURVE  0x000
 791 # define OPENSSL_EC_NAMED_CURVE     0x001
 792
 793 EC_GROUP *d2i_ECPKParameters(EC_GROUP **, const unsigned char **in, long len);
 794 int i2d_ECPKParameters(const EC_GROUP *, unsigned char **out);
 795
 796 # define d2i_ECPKParameters_bio(bp,x) ASN1_d2i_bio_of(EC_GROUP,NULL,d2i_ECPKParameters,bp,x)
 797 # define i2d_ECPKParameters_bio(bp,x) ASN1_i2d_bio_of_const(EC_GROUP,i2d_ECPKParameters,bp,x)
 798 # define d2i_ECPKParameters_fp(fp,x) (EC_GROUP *)ASN1_d2i_fp(NULL, \
 799                 (char *(*)())d2i_ECPKParameters,(fp),(unsigned char **)(x))
 800 # define i2d_ECPKParameters_fp(fp,x) ASN1_i2d_fp(i2d_ECPKParameters,(fp), \
 801                 (unsigned char *)(x))
 802
 803 int ECPKParameters_print(BIO *bp, const EC_GROUP *x, int off);
 804 # ifndef OPENSSL_NO_STDIO
 805 int ECPKParameters_print_fp(FILE *fp, const EC_GROUP *x, int off);
 806 # endif
 807
 808 /********************************************************************/
 809 /*                      EC_KEY functions                            */
 810 /********************************************************************/
 811
 812 /* some values for the encoding_flag */
 813 # define EC_PKEY_NO_PARAMETERS   0x001
 814 # define EC_PKEY_NO_PUBKEY       0x002
 815
 816 /* some values for the flags field */
 817 # define EC_FLAG_NON_FIPS_ALLOW  0x1
 818 # define EC_FLAG_FIPS_CHECKED    0x2
 819 # define EC_FLAG_COFACTOR_ECDH   0x1000
 820
 821 /** Creates a new EC_KEY object.
 822  *  \return EC_KEY object or NULL if an error occurred.
 823  */
 824 EC_KEY *EC_KEY_new(void);
 825
 826 int EC_KEY_get_flags(const EC_KEY *key);
 827
 828 void EC_KEY_set_flags(EC_KEY *key, int flags);
 829
 830 void EC_KEY_clear_flags(EC_KEY *key, int flags);
 831
 832 /** Creates a new EC_KEY object using a named curve as underlying
 833  *  EC_GROUP object.
 834  *  \param  nid  NID of the named curve.
 835  *  \return EC_KEY object or NULL if an error occurred.
 836  */
 837 EC_KEY *EC_KEY_new_by_curve_name(int nid);
 838
 839 /** Frees a EC_KEY object.
 840  *  \param  key  EC_KEY object to be freed.
 841  */
 842 void EC_KEY_free(EC_KEY *key);
 843
 844 /** Copies a EC_KEY object.
 845  *  \param  dst  destination EC_KEY object
 846  *  \param  src  src EC_KEY object
 847  *  \return dst or NULL if an error occurred.
 848  */
 849 EC_KEY *EC_KEY_copy(EC_KEY *dst, const EC_KEY *src);
 850
 851 /** Creates a new EC_KEY object and copies the content from src to it.
 852  *  \param  src  the source EC_KEY object
 853  *  \return newly created EC_KEY object or NULL if an error occurred.
 854  */
 855 EC_KEY *EC_KEY_dup(const EC_KEY *src);
 856
 857 /** Increases the internal reference count of a EC_KEY object.
 858  *  \param  key  EC_KEY object
 859  *  \return 1 on success and 0 if an error occurred.
 860  */
 861 int EC_KEY_up_ref(EC_KEY *key);
 862
 863 /** Returns the ENGINE object of a EC_KEY object
 864  *  \param  eckey  EC_KEY object
 865  *  \return the ENGINE object (possibly NULL).
 866  */
 867 ENGINE *EC_KEY_get0_engine(const EC_KEY *eckey);
 868
 869 /** Returns the EC_GROUP object of a EC_KEY object
 870  *  \param  key  EC_KEY object
 871  *  \return the EC_GROUP object (possibly NULL).
 872  */
 873 const EC_GROUP *EC_KEY_get0_group(const EC_KEY *key);
 874
 875 /** Sets the EC_GROUP of a EC_KEY object.
 876  *  \param  key    EC_KEY object
 877  *  \param  group  EC_GROUP to use in the EC_KEY object (note: the EC_KEY
 878  *                 object will use an own copy of the EC_GROUP).
 879  *  \return 1 on success and 0 if an error occurred.
 880  */
 881 int EC_KEY_set_group(EC_KEY *key, const EC_GROUP *group);
 882
 883 /** Returns the private key of a EC_KEY object.
 884  *  \param  key  EC_KEY object
 885  *  \return a BIGNUM with the private key (possibly NULL).
 886  */
 887 const BIGNUM *EC_KEY_get0_private_key(const EC_KEY *key);
 888
 889 /** Sets the private key of a EC_KEY object.
 890  *  \param  key  EC_KEY object
 891  *  \param  prv  BIGNUM with the private key (note: the EC_KEY object
 892  *               will use an own copy of the BIGNUM).
 893  *  \return 1 on success and 0 if an error occurred.
 894  */
 895 int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *prv);
 896
 897 /** Returns the public key of a EC_KEY object.
 898  *  \param  key  the EC_KEY object
 899  *  \return a EC_POINT object with the public key (possibly NULL)
 900  */
 901 const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *key);
 902
 903 /** Sets the public key of a EC_KEY object.
 904  *  \param  key  EC_KEY object
 905  *  \param  pub  EC_POINT object with the public key (note: the EC_KEY object
 906  *               will use an own copy of the EC_POINT object).
 907  *  \return 1 on success and 0 if an error occurred.
 908  */
 909 int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub);
 910
 911 unsigned EC_KEY_get_enc_flags(const EC_KEY *key);
 912 void EC_KEY_set_enc_flags(EC_KEY *eckey, unsigned int flags);
 913 point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key);
 914 void EC_KEY_set_conv_form(EC_KEY *eckey, point_conversion_form_t cform);
 915
 916 #define EC_KEY_get_ex_new_index(l, p, newf, dupf, freef) \
 917     CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_EC_KEY, l, p, newf, dupf, freef)
 918 int EC_KEY_set_ex_data(EC_KEY *key, int idx, void *arg);
 919 void *EC_KEY_get_ex_data(const EC_KEY *key, int idx);
 920
 921 /* wrapper functions for the underlying EC_GROUP object */
 922 void EC_KEY_set_asn1_flag(EC_KEY *eckey, int asn1_flag);
 923
 924 /** Creates a table of pre-computed multiples of the generator to
 925  *  accelerate further EC_KEY operations.
 926  *  \param  key  EC_KEY object
 927  *  \param  ctx  BN_CTX object (optional)
 928  *  \return 1 on success and 0 if an error occurred.
 929  */
 930 int EC_KEY_precompute_mult(EC_KEY *key, BN_CTX *ctx);
 931
 932 /** Creates a new ec private (and optional a new public) key.
 933  *  \param  key  EC_KEY object
 934  *  \return 1 on success and 0 if an error occurred.
 935  */
 936 int EC_KEY_generate_key(EC_KEY *key);
 937
 938 /** Verifies that a private and/or public key is valid.
 939  *  \param  key  the EC_KEY object
 940  *  \return 1 on success and 0 otherwise.
 941  */
 942 int EC_KEY_check_key(const EC_KEY *key);
 943
 944 /** Indicates if an EC_KEY can be used for signing.
 945  *  \param  eckey  the EC_KEY object
 946  *  \return 1 if can can sign and 0 otherwise.
 947  */
 948 int EC_KEY_can_sign(const EC_KEY *eckey);
 949
 950 /** Sets a public key from affine coordinates performing
 951  *  necessary NIST PKV tests.
 952  *  \param  key  the EC_KEY object
 953  *  \param  x    public key x coordinate
 954  *  \param  y    public key y coordinate
 955  *  \return 1 on success and 0 otherwise.
 956  */
 957 int EC_KEY_set_public_key_affine_coordinates(EC_KEY *key, BIGNUM *x,
 958                                              BIGNUM *y);
 959
 960 /** Encodes an EC_KEY public key to an allocated octet string
 961  *  \param  key    key to encode
 962  *  \param  form   point conversion form
 963  *  \param  pbuf   returns pointer to allocated buffer
 964  *  \param  ctx    BN_CTX object (optional)
 965  *  \return the length of the encoded octet string or 0 if an error occurred
 966  */
 967 size_t EC_KEY_key2buf(const EC_KEY *key, point_conversion_form_t form,
 968                       unsigned char **pbuf, BN_CTX *ctx);
 969
 970 /** Decodes a EC_KEY public key from a octet string
 971  *  \param  key    key to decode
 972  *  \param  buf    memory buffer with the encoded ec point
 973  *  \param  len    length of the encoded ec point
 974  *  \param  ctx    BN_CTX object (optional)
 975  *  \return 1 on success and 0 if an error occurred
 976  */
 977
 978 int EC_KEY_oct2key(EC_KEY *key, const unsigned char *buf, size_t len,
 979                    BN_CTX *ctx);
 980
 981 /** Decodes an EC_KEY private key from an octet string
 982  *  \param  key    key to decode
 983  *  \param  buf    memory buffer with the encoded private key
 984  *  \param  len    length of the encoded key
 985  *  \return 1 on success and 0 if an error occurred
 986  */
 987
 988 int EC_KEY_oct2priv(EC_KEY *key, const unsigned char *buf, size_t len);
 989
 990 /** Encodes a EC_KEY private key to an octet string
 991  *  \param  key    key to encode
 992  *  \param  buf    memory buffer for the result. If NULL the function returns
 993  *                 required buffer size.
 994  *  \param  len    length of the memory buffer
 995  *  \return the length of the encoded octet string or 0 if an error occurred
 996  */
 997
 998 size_t EC_KEY_priv2oct(const EC_KEY *key, unsigned char *buf, size_t len);
 999
1000 /** Encodes an EC_KEY private key to an allocated octet string
1001  *  \param  eckey  key to encode
1002  *  \param  pbuf   returns pointer to allocated buffer
1003  *  \return the length of the encoded octet string or 0 if an error occurred
1004  */
1005 size_t EC_KEY_priv2buf(const EC_KEY *eckey, unsigned char **pbuf);
1006
1007 /********************************************************************/
1008 /*        de- and encoding functions for SEC1 ECPrivateKey          */
1009 /********************************************************************/
1010
1011 /** Decodes a private key from a memory buffer.
1012  *  \param  key  a pointer to a EC_KEY object which should be used (or NULL)
1013  *  \param  in   pointer to memory with the DER encoded private key
1014  *  \param  len  length of the DER encoded private key
1015  *  \return the decoded private key or NULL if an error occurred.
1016  */
1017 EC_KEY *d2i_ECPrivateKey(EC_KEY **key, const unsigned char **in, long len);
1018
1019 /** Encodes a private key object and stores the result in a buffer.
1020  *  \param  key  the EC_KEY object to encode
1021  *  \param  out  the buffer for the result (if NULL the function returns number
1022  *               of bytes needed).
1023  *  \return 1 on success and 0 if an error occurred.
1024  */
1025 int i2d_ECPrivateKey(EC_KEY *key, unsigned char **out);
1026
1027 /********************************************************************/
1028 /*        de- and encoding functions for EC parameters              */
1029 /********************************************************************/
1030
1031 /** Decodes ec parameter from a memory buffer.
1032  *  \param  key  a pointer to a EC_KEY object which should be used (or NULL)
1033  *  \param  in   pointer to memory with the DER encoded ec parameters
1034  *  \param  len  length of the DER encoded ec parameters
1035  *  \return a EC_KEY object with the decoded parameters or NULL if an error
1036  *          occurred.
1037  */
1038 EC_KEY *d2i_ECParameters(EC_KEY **key, const unsigned char **in, long len);
1039
1040 /** Encodes ec parameter and stores the result in a buffer.
1041  *  \param  key  the EC_KEY object with ec parameters to encode
1042  *  \param  out  the buffer for the result (if NULL the function returns number
1043  *               of bytes needed).
1044  *  \return 1 on success and 0 if an error occurred.
1045  */
1046 int i2d_ECParameters(EC_KEY *key, unsigned char **out);
1047
1048 /********************************************************************/
1049 /*         de- and encoding functions for EC public key             */
1050 /*         (octet string, not DER -- hence 'o2i' and 'i2o')         */
1051 /********************************************************************/
1052
1053 /** Decodes a ec public key from a octet string.
1054  *  \param  key  a pointer to a EC_KEY object which should be used
1055  *  \param  in   memory buffer with the encoded public key
1056  *  \param  len  length of the encoded public key
1057  *  \return EC_KEY object with decoded public key or NULL if an error
1058  *          occurred.
1059  */
1060 EC_KEY *o2i_ECPublicKey(EC_KEY **key, const unsigned char **in, long len);
1061
1062 /** Encodes a ec public key in an octet string.
1063  *  \param  key  the EC_KEY object with the public key
1064  *  \param  out  the buffer for the result (if NULL the function returns number
1065  *               of bytes needed).
1066  *  \return 1 on success and 0 if an error occurred
1067  */
1068 int i2o_ECPublicKey(const EC_KEY *key, unsigned char **out);
1069
1070 /** Prints out the ec parameters on human readable form.
1071  *  \param  bp   BIO object to which the information is printed
1072  *  \param  key  EC_KEY object
1073  *  \return 1 on success and 0 if an error occurred
1074  */
1075 int ECParameters_print(BIO *bp, const EC_KEY *key);
1076
1077 /** Prints out the contents of a EC_KEY object
1078  *  \param  bp   BIO object to which the information is printed
1079  *  \param  key  EC_KEY object
1080  *  \param  off  line offset
1081  *  \return 1 on success and 0 if an error occurred
1082  */
1083 int EC_KEY_print(BIO *bp, const EC_KEY *key, int off);
1084
1085 # ifndef OPENSSL_NO_STDIO
1086 /** Prints out the ec parameters on human readable form.
1087  *  \param  fp   file descriptor to which the information is printed
1088  *  \param  key  EC_KEY object
1089  *  \return 1 on success and 0 if an error occurred
1090  */
1091 int ECParameters_print_fp(FILE *fp, const EC_KEY *key);
1092
1093 /** Prints out the contents of a EC_KEY object
1094  *  \param  fp   file descriptor to which the information is printed
1095  *  \param  key  EC_KEY object
1096  *  \param  off  line offset
1097  *  \return 1 on success and 0 if an error occurred
1098  */
1099 int EC_KEY_print_fp(FILE *fp, const EC_KEY *key, int off);
1100
1101 # endif
1102
1103 const EC_KEY_METHOD *EC_KEY_OpenSSL(void);
1104 const EC_KEY_METHOD *EC_KEY_get_default_method(void);
1105 void EC_KEY_set_default_method(const EC_KEY_METHOD *meth);
1106 const EC_KEY_METHOD *EC_KEY_get_method(const EC_KEY *key);
1107 int EC_KEY_set_method(EC_KEY *key, const EC_KEY_METHOD *meth);
1108 EC_KEY *EC_KEY_new_method(ENGINE *engine);
1109
1110 /** The old name for ecdh_KDF_X9_63
1111  *  The ECDH KDF specification has been mistakingly attributed to ANSI X9.62,
1112  *  it is actually specified in ANSI X9.63.
1113  *  This identifier is retained for backwards compatibility
1114  */
1115 DEPRECATEDIN_3(int ECDH_KDF_X9_62(unsigned char *out, size_t outlen,
1116                                   const unsigned char *Z, size_t Zlen,
1117                                   const unsigned char *sinfo, size_t sinfolen,
1118                                   const EVP_MD *md))
1119
1120 int ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
1121                      const EC_KEY *ecdh,
1122                      void *(*KDF) (const void *in, size_t inlen,
1123                                    void *out, size_t *outlen));
1124
1125 typedef struct ECDSA_SIG_st ECDSA_SIG;
1126
1127 /** Allocates and initialize a ECDSA_SIG structure
1128  *  \return pointer to a ECDSA_SIG structure or NULL if an error occurred
1129  */
1130 ECDSA_SIG *ECDSA_SIG_new(void);
1131
1132 /** frees a ECDSA_SIG structure
1133  *  \param  sig  pointer to the ECDSA_SIG structure
1134  */
1135 void ECDSA_SIG_free(ECDSA_SIG *sig);
1136
1137 /** DER encode content of ECDSA_SIG object (note: this function modifies *pp
1138  *  (*pp += length of the DER encoded signature)).
1139  *  \param  sig  pointer to the ECDSA_SIG object
1140  *  \param  pp   pointer to a unsigned char pointer for the output or NULL
1141  *  \return the length of the DER encoded ECDSA_SIG object or 0
1142  */
1143 int i2d_ECDSA_SIG(const ECDSA_SIG *sig, unsigned char **pp);
1144
1145 /** Decodes a DER encoded ECDSA signature (note: this function changes *pp
1146  *  (*pp += len)).
1147  *  \param  sig  pointer to ECDSA_SIG pointer (may be NULL)
1148  *  \param  pp   memory buffer with the DER encoded signature
1149  *  \param  len  length of the buffer
1150  *  \return pointer to the decoded ECDSA_SIG structure (or NULL)
1151  */
1152 ECDSA_SIG *d2i_ECDSA_SIG(ECDSA_SIG **sig, const unsigned char **pp, long len);
1153
1154 /** Accessor for r and s fields of ECDSA_SIG
1155  *  \param  sig  pointer to ECDSA_SIG structure
1156  *  \param  pr   pointer to BIGNUM pointer for r (may be NULL)
1157  *  \param  ps   pointer to BIGNUM pointer for s (may be NULL)
1158  */
1159 void ECDSA_SIG_get0(const ECDSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps);
1160
1161 /** Accessor for r field of ECDSA_SIG
1162  *  \param  sig  pointer to ECDSA_SIG structure
1163  */
1164 const BIGNUM *ECDSA_SIG_get0_r(const ECDSA_SIG *sig);
1165
1166 /** Accessor for s field of ECDSA_SIG
1167  *  \param  sig  pointer to ECDSA_SIG structure
1168  */
1169 const BIGNUM *ECDSA_SIG_get0_s(const ECDSA_SIG *sig);
1170
1171 /** Setter for r and s fields of ECDSA_SIG
1172  *  \param  sig  pointer to ECDSA_SIG structure
1173  *  \param  r    pointer to BIGNUM for r (may be NULL)
1174  *  \param  s    pointer to BIGNUM for s (may be NULL)
1175  */
1176 int ECDSA_SIG_set0(ECDSA_SIG *sig, BIGNUM *r, BIGNUM *s);
1177
1178 /** Computes the ECDSA signature of the given hash value using
1179  *  the supplied private key and returns the created signature.
1180  *  \param  dgst      pointer to the hash value
1181  *  \param  dgst_len  length of the hash value
1182  *  \param  eckey     EC_KEY object containing a private EC key
1183  *  \return pointer to a ECDSA_SIG structure or NULL if an error occurred
1184  */
1185 ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst, int dgst_len,
1186                          EC_KEY *eckey);
1187
1188 /** Computes ECDSA signature of a given hash value using the supplied
1189  *  private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
1190  *  \param  dgst     pointer to the hash value to sign
1191  *  \param  dgstlen  length of the hash value
1192  *  \param  kinv     BIGNUM with a pre-computed inverse k (optional)
1193  *  \param  rp       BIGNUM with a pre-computed rp value (optional),
1194  *                   see ECDSA_sign_setup
1195  *  \param  eckey    EC_KEY object containing a private EC key
1196  *  \return pointer to a ECDSA_SIG structure or NULL if an error occurred
1197  */
1198 ECDSA_SIG *ECDSA_do_sign_ex(const unsigned char *dgst, int dgstlen,
1199                             const BIGNUM *kinv, const BIGNUM *rp,
1200                             EC_KEY *eckey);
1201
1202 /** Verifies that the supplied signature is a valid ECDSA
1203  *  signature of the supplied hash value using the supplied public key.
1204  *  \param  dgst      pointer to the hash value
1205  *  \param  dgst_len  length of the hash value
1206  *  \param  sig       ECDSA_SIG structure
1207  *  \param  eckey     EC_KEY object containing a public EC key
1208  *  \return 1 if the signature is valid, 0 if the signature is invalid
1209  *          and -1 on error
1210  */
1211 int ECDSA_do_verify(const unsigned char *dgst, int dgst_len,
1212                     const ECDSA_SIG *sig, EC_KEY *eckey);
1213
1214 /** Precompute parts of the signing operation
1215  *  \param  eckey  EC_KEY object containing a private EC key
1216  *  \param  ctx    BN_CTX object (optional)
1217  *  \param  kinv   BIGNUM pointer for the inverse of k
1218  *  \param  rp     BIGNUM pointer for x coordinate of k * generator
1219  *  \return 1 on success and 0 otherwise
1220  */
1221 int ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx, BIGNUM **kinv, BIGNUM **rp);
1222
1223 /** Computes ECDSA signature of a given hash value using the supplied
1224  *  private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
1225  *  \param  type     this parameter is ignored
1226  *  \param  dgst     pointer to the hash value to sign
1227  *  \param  dgstlen  length of the hash value
1228  *  \param  sig      memory for the DER encoded created signature
1229  *  \param  siglen   pointer to the length of the returned signature
1230  *  \param  eckey    EC_KEY object containing a private EC key
1231  *  \return 1 on success and 0 otherwise
1232  */
1233 int ECDSA_sign(int type, const unsigned char *dgst, int dgstlen,
1234                unsigned char *sig, unsigned int *siglen, EC_KEY *eckey);
1235
1236 /** Computes ECDSA signature of a given hash value using the supplied
1237  *  private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
1238  *  \param  type     this parameter is ignored
1239  *  \param  dgst     pointer to the hash value to sign
1240  *  \param  dgstlen  length of the hash value
1241  *  \param  sig      buffer to hold the DER encoded signature
1242  *  \param  siglen   pointer to the length of the returned signature
1243  *  \param  kinv     BIGNUM with a pre-computed inverse k (optional)
1244  *  \param  rp       BIGNUM with a pre-computed rp value (optional),
1245  *                   see ECDSA_sign_setup
1246  *  \param  eckey    EC_KEY object containing a private EC key
1247  *  \return 1 on success and 0 otherwise
1248  */
1249 int ECDSA_sign_ex(int type, const unsigned char *dgst, int dgstlen,
1250                   unsigned char *sig, unsigned int *siglen,
1251                   const BIGNUM *kinv, const BIGNUM *rp, EC_KEY *eckey);
1252
1253 /** Verifies that the given signature is valid ECDSA signature
1254  *  of the supplied hash value using the specified public key.
1255  *  \param  type     this parameter is ignored
1256  *  \param  dgst     pointer to the hash value
1257  *  \param  dgstlen  length of the hash value
1258  *  \param  sig      pointer to the DER encoded signature
1259  *  \param  siglen   length of the DER encoded signature
1260  *  \param  eckey    EC_KEY object containing a public EC key
1261  *  \return 1 if the signature is valid, 0 if the signature is invalid
1262  *          and -1 on error
1263  */
1264 int ECDSA_verify(int type, const unsigned char *dgst, int dgstlen,
1265                  const unsigned char *sig, int siglen, EC_KEY *eckey);
1266
1267 /** Returns the maximum length of the DER encoded signature
1268  *  \param  eckey  EC_KEY object
1269  *  \return numbers of bytes required for the DER encoded signature
1270  */
1271 int ECDSA_size(const EC_KEY *eckey);
1272
1273 /********************************************************************/
1274 /*  EC_KEY_METHOD constructors, destructors, writers and accessors  */
1275 /********************************************************************/
1276
1277 EC_KEY_METHOD *EC_KEY_METHOD_new(const EC_KEY_METHOD *meth);
1278 void EC_KEY_METHOD_free(EC_KEY_METHOD *meth);
1279 void EC_KEY_METHOD_set_init(EC_KEY_METHOD *meth,
1280                             int (*init)(EC_KEY *key),
1281                             void (*finish)(EC_KEY *key),
1282                             int (*copy)(EC_KEY *dest, const EC_KEY *src),
1283                             int (*set_group)(EC_KEY *key, const EC_GROUP *grp),
1284                             int (*set_private)(EC_KEY *key,
1285                                                const BIGNUM *priv_key),
1286                             int (*set_public)(EC_KEY *key,
1287                                               const EC_POINT *pub_key));
1288
1289 void EC_KEY_METHOD_set_keygen(EC_KEY_METHOD *meth,
1290                               int (*keygen)(EC_KEY *key));
1291
1292 void EC_KEY_METHOD_set_compute_key(EC_KEY_METHOD *meth,
1293                                    int (*ckey)(unsigned char **psec,
1294                                                size_t *pseclen,
1295                                                const EC_POINT *pub_key,
1296                                                const EC_KEY *ecdh));
1297
1298 void EC_KEY_METHOD_set_sign(EC_KEY_METHOD *meth,
1299                             int (*sign)(int type, const unsigned char *dgst,
1300                                         int dlen, unsigned char *sig,
1301                                         unsigned int *siglen,
1302                                         const BIGNUM *kinv, const BIGNUM *r,
1303                                         EC_KEY *eckey),
1304                             int (*sign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
1305                                               BIGNUM **kinvp, BIGNUM **rp),
1306                             ECDSA_SIG *(*sign_sig)(const unsigned char *dgst,
1307                                                    int dgst_len,
1308                                                    const BIGNUM *in_kinv,
1309                                                    const BIGNUM *in_r,
1310                                                    EC_KEY *eckey));
1311
1312 void EC_KEY_METHOD_set_verify(EC_KEY_METHOD *meth,
1313                               int (*verify)(int type, const unsigned
1314                                             char *dgst, int dgst_len,
1315                                             const unsigned char *sigbuf,
1316                                             int sig_len, EC_KEY *eckey),
1317                               int (*verify_sig)(const unsigned char *dgst,
1318                                                 int dgst_len,
1319                                                 const ECDSA_SIG *sig,
1320                                                 EC_KEY *eckey));
1321
1322 void EC_KEY_METHOD_get_init(const EC_KEY_METHOD *meth,
1323                             int (**pinit)(EC_KEY *key),
1324                             void (**pfinish)(EC_KEY *key),
1325                             int (**pcopy)(EC_KEY *dest, const EC_KEY *src),
1326                             int (**pset_group)(EC_KEY *key,
1327                                                const EC_GROUP *grp),
1328                             int (**pset_private)(EC_KEY *key,
1329                                                  const BIGNUM *priv_key),
1330                             int (**pset_public)(EC_KEY *key,
1331                                                 const EC_POINT *pub_key));
1332
1333 void EC_KEY_METHOD_get_keygen(const EC_KEY_METHOD *meth,
1334                               int (**pkeygen)(EC_KEY *key));
1335
1336 void EC_KEY_METHOD_get_compute_key(const EC_KEY_METHOD *meth,
1337                                    int (**pck)(unsigned char **psec,
1338                                                size_t *pseclen,
1339                                                const EC_POINT *pub_key,
1340                                                const EC_KEY *ecdh));
1341
1342 void EC_KEY_METHOD_get_sign(const EC_KEY_METHOD *meth,
1343                             int (**psign)(int type, const unsigned char *dgst,
1344                                           int dlen, unsigned char *sig,
1345                                           unsigned int *siglen,
1346                                           const BIGNUM *kinv, const BIGNUM *r,
1347                                           EC_KEY *eckey),
1348                             int (**psign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
1349                                                 BIGNUM **kinvp, BIGNUM **rp),
1350                             ECDSA_SIG *(**psign_sig)(const unsigned char *dgst,
1351                                                      int dgst_len,
1352                                                      const BIGNUM *in_kinv,
1353                                                      const BIGNUM *in_r,
1354                                                      EC_KEY *eckey));
1355
1356 void EC_KEY_METHOD_get_verify(const EC_KEY_METHOD *meth,
1357                               int (**pverify)(int type, const unsigned
1358                                               char *dgst, int dgst_len,
1359                                               const unsigned char *sigbuf,
1360                                               int sig_len, EC_KEY *eckey),
1361                               int (**pverify_sig)(const unsigned char *dgst,
1362                                                   int dgst_len,
1363                                                   const ECDSA_SIG *sig,
1364                                                   EC_KEY *eckey));
1365
1366 # define ECParameters_dup(x) ASN1_dup_of(EC_KEY,i2d_ECParameters,d2i_ECParameters,x)
1367
1368 # ifndef __cplusplus
1369 #  if defined(__SUNPRO_C)
1370 #   if __SUNPRO_C >= 0x520
1371 #    pragma error_messages (default,E_ARRAY_OF_INCOMPLETE_NONAME,E_ARRAY_OF_INCOMPLETE)
1372 #   endif
1373 #  endif
1374 # endif
1375
1376 # define EVP_PKEY_CTX_set_ec_paramgen_curve_nid(ctx, nid) \
1377         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1378                                 EVP_PKEY_OP_PARAMGEN|EVP_PKEY_OP_KEYGEN, \
1379                                 EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID, nid, NULL)
1380
1381 # define EVP_PKEY_CTX_set_ec_param_enc(ctx, flag) \
1382         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1383                                 EVP_PKEY_OP_PARAMGEN|EVP_PKEY_OP_KEYGEN, \
1384                                 EVP_PKEY_CTRL_EC_PARAM_ENC, flag, NULL)
1385
1386 # define EVP_PKEY_CTX_set_ecdh_cofactor_mode(ctx, flag) \
1387         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1388                                 EVP_PKEY_OP_DERIVE, \
1389                                 EVP_PKEY_CTRL_EC_ECDH_COFACTOR, flag, NULL)
1390
1391 # define EVP_PKEY_CTX_get_ecdh_cofactor_mode(ctx) \
1392         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1393                                 EVP_PKEY_OP_DERIVE, \
1394                                 EVP_PKEY_CTRL_EC_ECDH_COFACTOR, -2, NULL)
1395
1396 # define EVP_PKEY_CTX_set_ecdh_kdf_type(ctx, kdf) \
1397         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1398                                 EVP_PKEY_OP_DERIVE, \
1399                                 EVP_PKEY_CTRL_EC_KDF_TYPE, kdf, NULL)
1400
1401 # define EVP_PKEY_CTX_get_ecdh_kdf_type(ctx) \
1402         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1403                                 EVP_PKEY_OP_DERIVE, \
1404                                 EVP_PKEY_CTRL_EC_KDF_TYPE, -2, NULL)
1405
1406 # define EVP_PKEY_CTX_set_ecdh_kdf_md(ctx, md) \
1407         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1408                                 EVP_PKEY_OP_DERIVE, \
1409                                 EVP_PKEY_CTRL_EC_KDF_MD, 0, (void *)(md))
1410
1411 # define EVP_PKEY_CTX_get_ecdh_kdf_md(ctx, pmd) \
1412         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1413                                 EVP_PKEY_OP_DERIVE, \
1414                                 EVP_PKEY_CTRL_GET_EC_KDF_MD, 0, (void *)(pmd))
1415
1416 # define EVP_PKEY_CTX_set_ecdh_kdf_outlen(ctx, len) \
1417         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1418                                 EVP_PKEY_OP_DERIVE, \
1419                                 EVP_PKEY_CTRL_EC_KDF_OUTLEN, len, NULL)
1420
1421 # define EVP_PKEY_CTX_get_ecdh_kdf_outlen(ctx, plen) \
1422         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1423                                 EVP_PKEY_OP_DERIVE, \
1424                                 EVP_PKEY_CTRL_GET_EC_KDF_OUTLEN, 0, \
1425                                 (void *)(plen))
1426
1427 # define EVP_PKEY_CTX_set0_ecdh_kdf_ukm(ctx, p, plen) \
1428         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1429                                 EVP_PKEY_OP_DERIVE, \
1430                                 EVP_PKEY_CTRL_EC_KDF_UKM, plen, (void *)(p))
1431
1432 # define EVP_PKEY_CTX_get0_ecdh_kdf_ukm(ctx, p) \
1433         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1434                                 EVP_PKEY_OP_DERIVE, \
1435                                 EVP_PKEY_CTRL_GET_EC_KDF_UKM, 0, (void *)(p))
1436
1437 /* SM2 will skip the operation check so no need to pass operation here */
1438 # define EVP_PKEY_CTX_set1_id(ctx, id, id_len) \
1439         EVP_PKEY_CTX_ctrl(ctx, -1, -1, \
1440                                 EVP_PKEY_CTRL_SET1_ID, (int)id_len, (void*)(id))
1441
1442 # define EVP_PKEY_CTX_get1_id(ctx, id) \
1443         EVP_PKEY_CTX_ctrl(ctx, -1, -1, \
1444                                 EVP_PKEY_CTRL_GET1_ID, 0, (void*)(id))
1445
1446 # define EVP_PKEY_CTX_get1_id_len(ctx, id_len) \
1447         EVP_PKEY_CTX_ctrl(ctx, -1, -1, \
1448                                 EVP_PKEY_CTRL_GET1_ID_LEN, 0, (void*)(id_len))
1449
1450 # define EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID             (EVP_PKEY_ALG_CTRL + 1)
1451 # define EVP_PKEY_CTRL_EC_PARAM_ENC                      (EVP_PKEY_ALG_CTRL + 2)
1452 # define EVP_PKEY_CTRL_EC_ECDH_COFACTOR                  (EVP_PKEY_ALG_CTRL + 3)
1453 # define EVP_PKEY_CTRL_EC_KDF_TYPE                       (EVP_PKEY_ALG_CTRL + 4)
1454 # define EVP_PKEY_CTRL_EC_KDF_MD                         (EVP_PKEY_ALG_CTRL + 5)
1455 # define EVP_PKEY_CTRL_GET_EC_KDF_MD                     (EVP_PKEY_ALG_CTRL + 6)
1456 # define EVP_PKEY_CTRL_EC_KDF_OUTLEN                     (EVP_PKEY_ALG_CTRL + 7)
1457 # define EVP_PKEY_CTRL_GET_EC_KDF_OUTLEN                 (EVP_PKEY_ALG_CTRL + 8)
1458 # define EVP_PKEY_CTRL_EC_KDF_UKM                        (EVP_PKEY_ALG_CTRL + 9)
1459 # define EVP_PKEY_CTRL_GET_EC_KDF_UKM                    (EVP_PKEY_ALG_CTRL + 10)
1460 # define EVP_PKEY_CTRL_SET1_ID                           (EVP_PKEY_ALG_CTRL + 11)
1461 # define EVP_PKEY_CTRL_GET1_ID                           (EVP_PKEY_ALG_CTRL + 12)
1462 # define EVP_PKEY_CTRL_GET1_ID_LEN                       (EVP_PKEY_ALG_CTRL + 13)
1463 /* KDF types */
1464 # define EVP_PKEY_ECDH_KDF_NONE                          1
1465 # define EVP_PKEY_ECDH_KDF_X9_63                         2
1466 /** The old name for EVP_PKEY_ECDH_KDF_X9_63
1467  *  The ECDH KDF specification has been mistakingly attributed to ANSI X9.62,
1468  *  it is actually specified in ANSI X9.63.
1469  *  This identifier is retained for backwards compatibility
1470  */
1471 # define EVP_PKEY_ECDH_KDF_X9_62   EVP_PKEY_ECDH_KDF_X9_63
1472
1473
1474 #  ifdef  __cplusplus
1475 }
1476 #  endif
1477 # endif
1478 #endif