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 /**
 104  *  Creates a new EC_GROUP object
 105  *  \param   libctx The associated library context or NULL for the default
 106  *                  library context
 107  *  \param   meth   EC_METHOD to use
 108  *  \return  newly created EC_GROUP object or NULL in case of an error.
 109  */
 110 EC_GROUP *EC_GROUP_new_ex(OPENSSL_CTX *libctx, const EC_METHOD *meth);
 111
 112 /**
 113  *  Creates a new EC_GROUP object. Same as EC_GROUP_new_ex with NULL for the
 114  *  library context.
 115  *  \param   meth   EC_METHOD to use
 116  *  \return  newly created EC_GROUP object or NULL in case of an error.
 117  */
 118 EC_GROUP *EC_GROUP_new(const EC_METHOD *meth);
 119
 120 /** Frees a EC_GROUP object
 121  *  \param  group  EC_GROUP object to be freed.
 122  */
 123 void EC_GROUP_free(EC_GROUP *group);
 124
 125 /** Clears and frees a EC_GROUP object
 126  *  \param  group  EC_GROUP object to be cleared and freed.
 127  */
 128 void EC_GROUP_clear_free(EC_GROUP *group);
 129
 130 /** Copies EC_GROUP objects. Note: both EC_GROUPs must use the same EC_METHOD.
 131  *  \param  dst  destination EC_GROUP object
 132  *  \param  src  source EC_GROUP object
 133  *  \return 1 on success and 0 if an error occurred.
 134  */
 135 int EC_GROUP_copy(EC_GROUP *dst, const EC_GROUP *src);
 136
 137 /** Creates a new EC_GROUP object and copies the content
 138  *  form src to the newly created EC_KEY object
 139  *  \param  src  source EC_GROUP object
 140  *  \return newly created EC_GROUP object or NULL in case of an error.
 141  */
 142 EC_GROUP *EC_GROUP_dup(const EC_GROUP *src);
 143
 144 /** Returns the EC_METHOD of the EC_GROUP object.
 145  *  \param  group  EC_GROUP object
 146  *  \return EC_METHOD used in this EC_GROUP object.
 147  */
 148 const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group);
 149
 150 /** Returns the field type of the EC_METHOD.
 151  *  \param  meth  EC_METHOD object
 152  *  \return NID of the underlying field type OID.
 153  */
 154 int EC_METHOD_get_field_type(const EC_METHOD *meth);
 155
 156 /** Sets the generator and its order/cofactor of a EC_GROUP object.
 157  *  \param  group      EC_GROUP object
 158  *  \param  generator  EC_POINT object with the generator.
 159  *  \param  order      the order of the group generated by the generator.
 160  *  \param  cofactor   the index of the sub-group generated by the generator
 161  *                     in the group of all points on the elliptic curve.
 162  *  \return 1 on success and 0 if an error occurred
 163  */
 164 int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator,
 165                            const BIGNUM *order, const BIGNUM *cofactor);
 166
 167 /** Returns the generator of a EC_GROUP object.
 168  *  \param  group  EC_GROUP object
 169  *  \return the currently used generator (possibly NULL).
 170  */
 171 const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group);
 172
 173 /** Returns the montgomery data for order(Generator)
 174  *  \param  group  EC_GROUP object
 175  *  \return the currently used montgomery data (possibly NULL).
 176 */
 177 BN_MONT_CTX *EC_GROUP_get_mont_data(const EC_GROUP *group);
 178
 179 /** Gets the order of a EC_GROUP
 180  *  \param  group  EC_GROUP object
 181  *  \param  order  BIGNUM to which the order is copied
 182  *  \param  ctx    unused
 183  *  \return 1 on success and 0 if an error occurred
 184  */
 185 int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx);
 186
 187 /** Gets the order of an EC_GROUP
 188  *  \param  group  EC_GROUP object
 189  *  \return the group order
 190  */
 191 const BIGNUM *EC_GROUP_get0_order(const EC_GROUP *group);
 192
 193 /** Gets the number of bits of the order of an EC_GROUP
 194  *  \param  group  EC_GROUP object
 195  *  \return number of bits of group order.
 196  */
 197 int EC_GROUP_order_bits(const EC_GROUP *group);
 198
 199 /** Gets the cofactor of a EC_GROUP
 200  *  \param  group     EC_GROUP object
 201  *  \param  cofactor  BIGNUM to which the cofactor is copied
 202  *  \param  ctx       unused
 203  *  \return 1 on success and 0 if an error occurred
 204  */
 205 int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor,
 206                           BN_CTX *ctx);
 207
 208 /** Gets the cofactor of an EC_GROUP
 209  *  \param  group  EC_GROUP object
 210  *  \return the group cofactor
 211  */
 212 const BIGNUM *EC_GROUP_get0_cofactor(const EC_GROUP *group);
 213
 214 /** Sets the name of a EC_GROUP object
 215  *  \param  group  EC_GROUP object
 216  *  \param  nid    NID of the curve name OID
 217  */
 218 void EC_GROUP_set_curve_name(EC_GROUP *group, int nid);
 219
 220 /** Returns the curve name of a EC_GROUP object
 221  *  \param  group  EC_GROUP object
 222  *  \return NID of the curve name OID or 0 if not set.
 223  */
 224 int EC_GROUP_get_curve_name(const EC_GROUP *group);
 225
 226 /** Gets the field of an EC_GROUP
 227  *  \param  group  EC_GROUP object
 228  *  \return the group field
 229  */
 230 const BIGNUM *EC_GROUP_get0_field(const EC_GROUP *group);
 231
 232 void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag);
 233 int EC_GROUP_get_asn1_flag(const EC_GROUP *group);
 234
 235 void EC_GROUP_set_point_conversion_form(EC_GROUP *group,
 236                                         point_conversion_form_t form);
 237 point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP *);
 238
 239 unsigned char *EC_GROUP_get0_seed(const EC_GROUP *x);
 240 size_t EC_GROUP_get_seed_len(const EC_GROUP *);
 241 size_t EC_GROUP_set_seed(EC_GROUP *, const unsigned char *, size_t len);
 242
 243 /** Sets the parameters of a ec curve defined by y^2 = x^3 + a*x + b (for GFp)
 244  *  or y^2 + x*y = x^3 + a*x^2 + b (for GF2m)
 245  *  \param  group  EC_GROUP object
 246  *  \param  p      BIGNUM with the prime number (GFp) or the polynomial
 247  *                 defining the underlying field (GF2m)
 248  *  \param  a      BIGNUM with parameter a of the equation
 249  *  \param  b      BIGNUM with parameter b of the equation
 250  *  \param  ctx    BN_CTX object (optional)
 251  *  \return 1 on success and 0 if an error occurred
 252  */
 253 int EC_GROUP_set_curve(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a,
 254                        const BIGNUM *b, BN_CTX *ctx);
 255
 256 /** Gets the parameters of the ec curve defined by y^2 = x^3 + a*x + b (for GFp)
 257  *  or y^2 + x*y = x^3 + a*x^2 + b (for GF2m)
 258  *  \param  group  EC_GROUP object
 259  *  \param  p      BIGNUM with the prime number (GFp) or the polynomial
 260  *                 defining the underlying field (GF2m)
 261  *  \param  a      BIGNUM for parameter a of the equation
 262  *  \param  b      BIGNUM for parameter b of the equation
 263  *  \param  ctx    BN_CTX object (optional)
 264  *  \return 1 on success and 0 if an error occurred
 265  */
 266 int EC_GROUP_get_curve(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b,
 267                        BN_CTX *ctx);
 268
 269 /** Sets the parameters of an ec curve. Synonym for EC_GROUP_set_curve
 270  *  \param  group  EC_GROUP object
 271  *  \param  p      BIGNUM with the prime number (GFp) or the polynomial
 272  *                 defining the underlying field (GF2m)
 273  *  \param  a      BIGNUM with parameter a of the equation
 274  *  \param  b      BIGNUM with parameter b of the equation
 275  *  \param  ctx    BN_CTX object (optional)
 276  *  \return 1 on success and 0 if an error occurred
 277  */
 278 DEPRECATEDIN_3(int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p,
 279                                           const BIGNUM *a, const BIGNUM *b,
 280                                           BN_CTX *ctx))
 281
 282 /** Gets the parameters of an ec curve. Synonym for EC_GROUP_get_curve
 283  *  \param  group  EC_GROUP object
 284  *  \param  p      BIGNUM with the prime number (GFp) or the polynomial
 285  *                 defining the underlying field (GF2m)
 286  *  \param  a      BIGNUM for parameter a of the equation
 287  *  \param  b      BIGNUM for parameter b of the equation
 288  *  \param  ctx    BN_CTX object (optional)
 289  *  \return 1 on success and 0 if an error occurred
 290  */
 291 DEPRECATEDIN_3(int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p,
 292                                           BIGNUM *a, BIGNUM *b,
 293                                           BN_CTX *ctx))
 294
 295 # ifndef OPENSSL_NO_EC2M
 296 /** Sets the parameter of an ec curve. Synonym for EC_GROUP_set_curve
 297  *  \param  group  EC_GROUP object
 298  *  \param  p      BIGNUM with the prime number (GFp) or the polynomial
 299  *                 defining the underlying field (GF2m)
 300  *  \param  a      BIGNUM with parameter a of the equation
 301  *  \param  b      BIGNUM with parameter b of the equation
 302  *  \param  ctx    BN_CTX object (optional)
 303  *  \return 1 on success and 0 if an error occurred
 304  */
 305 DEPRECATEDIN_3(int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p,
 306                                            const BIGNUM *a, const BIGNUM *b,
 307                                            BN_CTX *ctx))
 308
 309 /** Gets the parameters of an ec curve. Synonym for EC_GROUP_get_curve
 310  *  \param  group  EC_GROUP object
 311  *  \param  p      BIGNUM with the prime number (GFp) or the polynomial
 312  *                 defining the underlying field (GF2m)
 313  *  \param  a      BIGNUM for parameter a of the equation
 314  *  \param  b      BIGNUM for parameter b of the equation
 315  *  \param  ctx    BN_CTX object (optional)
 316  *  \return 1 on success and 0 if an error occurred
 317  */
 318 DEPRECATEDIN_3(int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p,
 319                                            BIGNUM *a, BIGNUM *b,
 320                                            BN_CTX *ctx))
 321 # endif
 322 /** Returns the number of bits needed to represent a field element
 323  *  \param  group  EC_GROUP object
 324  *  \return number of bits needed to represent a field element
 325  */
 326 int EC_GROUP_get_degree(const EC_GROUP *group);
 327
 328 /** Checks whether the parameter in the EC_GROUP define a valid ec group
 329  *  \param  group  EC_GROUP object
 330  *  \param  ctx    BN_CTX object (optional)
 331  *  \return 1 if group is a valid ec group and 0 otherwise
 332  */
 333 int EC_GROUP_check(const EC_GROUP *group, BN_CTX *ctx);
 334
 335 /** Checks whether the discriminant of the elliptic curve is zero or not
 336  *  \param  group  EC_GROUP object
 337  *  \param  ctx    BN_CTX object (optional)
 338  *  \return 1 if the discriminant is not zero and 0 otherwise
 339  */
 340 int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx);
 341
 342 /** Compares two EC_GROUP objects
 343  *  \param  a    first EC_GROUP object
 344  *  \param  b    second EC_GROUP object
 345  *  \param  ctx  BN_CTX object (optional)
 346  *  \return 0 if the groups are equal, 1 if not, or -1 on error
 347  */
 348 int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx);
 349
 350 /*
 351  * EC_GROUP_new_GF*() calls EC_GROUP_new() and EC_GROUP_set_GF*() after
 352  * choosing an appropriate EC_METHOD
 353  */
 354
 355 /** Creates a new EC_GROUP object with the specified parameters defined
 356  *  over GFp (defined by the equation y^2 = x^3 + a*x + b)
 357  *  \param  p    BIGNUM with the prime number
 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_GFp(const BIGNUM *p, const BIGNUM *a,
 364                                  const BIGNUM *b, BN_CTX *ctx);
 365 # ifndef OPENSSL_NO_EC2M
 366 /** Creates a new EC_GROUP object with the specified parameters defined
 367  *  over GF2m (defined by the equation y^2 + x*y = x^3 + a*x^2 + b)
 368  *  \param  p    BIGNUM with the polynomial defining the underlying field
 369  *  \param  a    BIGNUM with the parameter a of the equation
 370  *  \param  b    BIGNUM with the parameter b of the equation
 371  *  \param  ctx  BN_CTX object (optional)
 372  *  \return newly created EC_GROUP object with the specified parameters
 373  */
 374 EC_GROUP *EC_GROUP_new_curve_GF2m(const BIGNUM *p, const BIGNUM *a,
 375                                   const BIGNUM *b, BN_CTX *ctx);
 376 # endif
 377
 378 /**
 379  * Creates a EC_GROUP object with a curve specified by a NID
 380  *  \param  libctx The associated library context or NULL for the default
 381  *                 context
 382  *  \param  nid    NID of the OID of the curve name
 383  *  \return newly created EC_GROUP object with specified curve or NULL
 384  *          if an error occurred
 385  */
 386 EC_GROUP *EC_GROUP_new_by_curve_name_ex(OPENSSL_CTX *libctx, int nid);
 387
 388 /**
 389  * Creates a EC_GROUP object with a curve specified by a NID. Same as
 390  * EC_GROUP_new_by_curve_name_ex but the libctx is always NULL.
 391  *  \param  nid    NID of the OID of the curve name
 392  *  \return newly created EC_GROUP object with specified curve or NULL
 393  *          if an error occurred
 394  */
 395 EC_GROUP *EC_GROUP_new_by_curve_name(int nid);
 396
 397 /** Creates a new EC_GROUP object from an ECPARAMETERS object
 398  *  \param  params  pointer to the ECPARAMETERS object
 399  *  \return newly created EC_GROUP object with specified curve or NULL
 400  *          if an error occurred
 401  */
 402 EC_GROUP *EC_GROUP_new_from_ecparameters(const ECPARAMETERS *params);
 403
 404 /** Creates an ECPARAMETERS object for the given EC_GROUP object.
 405  *  \param  group   pointer to the EC_GROUP object
 406  *  \param  params  pointer to an existing ECPARAMETERS object or NULL
 407  *  \return pointer to the new ECPARAMETERS object or NULL
 408  *          if an error occurred.
 409  */
 410 ECPARAMETERS *EC_GROUP_get_ecparameters(const EC_GROUP *group,
 411                                         ECPARAMETERS *params);
 412
 413 /** Creates a new EC_GROUP object from an ECPKPARAMETERS object
 414  *  \param  params  pointer to an existing ECPKPARAMETERS object, or NULL
 415  *  \return newly created EC_GROUP object with specified curve, or NULL
 416  *          if an error occurred
 417  */
 418 EC_GROUP *EC_GROUP_new_from_ecpkparameters(const ECPKPARAMETERS *params);
 419
 420 /** Creates an ECPKPARAMETERS object for the given EC_GROUP object.
 421  *  \param  group   pointer to the EC_GROUP object
 422  *  \param  params  pointer to an existing ECPKPARAMETERS object or NULL
 423  *  \return pointer to the new ECPKPARAMETERS object or NULL
 424  *          if an error occurred.
 425  */
 426 ECPKPARAMETERS *EC_GROUP_get_ecpkparameters(const EC_GROUP *group,
 427                                             ECPKPARAMETERS *params);
 428
 429 /********************************************************************/
 430 /*               handling of internal curves                        */
 431 /********************************************************************/
 432
 433 typedef struct {
 434     int nid;
 435     const char *comment;
 436 } EC_builtin_curve;
 437
 438 /*
 439  * EC_builtin_curves(EC_builtin_curve *r, size_t size) returns number of all
 440  * available curves or zero if a error occurred. In case r is not zero,
 441  * nitems EC_builtin_curve structures are filled with the data of the first
 442  * nitems internal groups
 443  */
 444 size_t EC_get_builtin_curves(EC_builtin_curve *r, size_t nitems);
 445
 446 const char *EC_curve_nid2nist(int nid);
 447 int EC_curve_nist2nid(const char *name);
 448 int EC_GROUP_check_named_curve(const EC_GROUP *group, int nist_only,
 449                                BN_CTX *ctx);
 450
 451 /********************************************************************/
 452 /*                    EC_POINT functions                            */
 453 /********************************************************************/
 454
 455 /** Creates a new EC_POINT object for the specified EC_GROUP
 456  *  \param  group  EC_GROUP the underlying EC_GROUP object
 457  *  \return newly created EC_POINT object or NULL if an error occurred
 458  */
 459 EC_POINT *EC_POINT_new(const EC_GROUP *group);
 460
 461 /** Frees a EC_POINT object
 462  *  \param  point  EC_POINT object to be freed
 463  */
 464 void EC_POINT_free(EC_POINT *point);
 465
 466 /** Clears and frees a EC_POINT object
 467  *  \param  point  EC_POINT object to be cleared and freed
 468  */
 469 void EC_POINT_clear_free(EC_POINT *point);
 470
 471 /** Copies EC_POINT object
 472  *  \param  dst  destination EC_POINT object
 473  *  \param  src  source EC_POINT object
 474  *  \return 1 on success and 0 if an error occurred
 475  */
 476 int EC_POINT_copy(EC_POINT *dst, const EC_POINT *src);
 477
 478 /** Creates a new EC_POINT object and copies the content of the supplied
 479  *  EC_POINT
 480  *  \param  src    source EC_POINT object
 481  *  \param  group  underlying the EC_GROUP object
 482  *  \return newly created EC_POINT object or NULL if an error occurred
 483  */
 484 EC_POINT *EC_POINT_dup(const EC_POINT *src, const EC_GROUP *group);
 485
 486 /** Returns the EC_METHOD used in EC_POINT object
 487  *  \param  point  EC_POINT object
 488  *  \return the EC_METHOD used
 489  */
 490 const EC_METHOD *EC_POINT_method_of(const EC_POINT *point);
 491
 492 /** Sets a point to infinity (neutral element)
 493  *  \param  group  underlying EC_GROUP object
 494  *  \param  point  EC_POINT to set to infinity
 495  *  \return 1 on success and 0 if an error occurred
 496  */
 497 int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point);
 498
 499 /** Sets the jacobian projective coordinates of a EC_POINT over GFp
 500  *  \param  group  underlying EC_GROUP object
 501  *  \param  p      EC_POINT object
 502  *  \param  x      BIGNUM with the x-coordinate
 503  *  \param  y      BIGNUM with the y-coordinate
 504  *  \param  z      BIGNUM with the z-coordinate
 505  *  \param  ctx    BN_CTX object (optional)
 506  *  \return 1 on success and 0 if an error occurred
 507  */
 508 int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group,
 509                                              EC_POINT *p, const BIGNUM *x,
 510                                              const BIGNUM *y, const BIGNUM *z,
 511                                              BN_CTX *ctx);
 512
 513 /** Gets the jacobian projective coordinates of a EC_POINT over GFp
 514  *  \param  group  underlying EC_GROUP object
 515  *  \param  p      EC_POINT object
 516  *  \param  x      BIGNUM for the x-coordinate
 517  *  \param  y      BIGNUM for the y-coordinate
 518  *  \param  z      BIGNUM for the z-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_Jprojective_coordinates_GFp(const EC_GROUP *group,
 523                                              const EC_POINT *p, BIGNUM *x,
 524                                              BIGNUM *y, BIGNUM *z,
 525                                              BN_CTX *ctx);
 526
 527 /** Sets the affine coordinates of an EC_POINT
 528  *  \param  group  underlying EC_GROUP object
 529  *  \param  p      EC_POINT object
 530  *  \param  x      BIGNUM with the x-coordinate
 531  *  \param  y      BIGNUM with the y-coordinate
 532  *  \param  ctx    BN_CTX object (optional)
 533  *  \return 1 on success and 0 if an error occurred
 534  */
 535 int EC_POINT_set_affine_coordinates(const EC_GROUP *group, EC_POINT *p,
 536                                     const BIGNUM *x, const BIGNUM *y,
 537                                     BN_CTX *ctx);
 538
 539 /** Gets the affine coordinates of an EC_POINT.
 540  *  \param  group  underlying EC_GROUP object
 541  *  \param  p      EC_POINT object
 542  *  \param  x      BIGNUM for the x-coordinate
 543  *  \param  y      BIGNUM for the y-coordinate
 544  *  \param  ctx    BN_CTX object (optional)
 545  *  \return 1 on success and 0 if an error occurred
 546  */
 547 int EC_POINT_get_affine_coordinates(const EC_GROUP *group, const EC_POINT *p,
 548                                     BIGNUM *x, BIGNUM *y, BN_CTX *ctx);
 549
 550 /** Sets the affine coordinates of an EC_POINT. A synonym of
 551  *  EC_POINT_set_affine_coordinates
 552  *  \param  group  underlying EC_GROUP object
 553  *  \param  p      EC_POINT object
 554  *  \param  x      BIGNUM with the x-coordinate
 555  *  \param  y      BIGNUM with the y-coordinate
 556  *  \param  ctx    BN_CTX object (optional)
 557  *  \return 1 on success and 0 if an error occurred
 558  */
 559 DEPRECATEDIN_3(int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group,
 560                                                        EC_POINT *p,
 561                                                        const BIGNUM *x,
 562                                                        const BIGNUM *y,
 563                                                        BN_CTX *ctx))
 564
 565 /** Gets the affine coordinates of an EC_POINT. A synonym of
 566  *  EC_POINT_get_affine_coordinates
 567  *  \param  group  underlying EC_GROUP object
 568  *  \param  p      EC_POINT object
 569  *  \param  x      BIGNUM for the x-coordinate
 570  *  \param  y      BIGNUM for the y-coordinate
 571  *  \param  ctx    BN_CTX object (optional)
 572  *  \return 1 on success and 0 if an error occurred
 573  */
 574 DEPRECATEDIN_3(int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group,
 575                                                        const EC_POINT *p,
 576                                                        BIGNUM *x,
 577                                                        BIGNUM *y,
 578                                                        BN_CTX *ctx))
 579
 580 /** Sets the x9.62 compressed coordinates of a EC_POINT
 581  *  \param  group  underlying EC_GROUP object
 582  *  \param  p      EC_POINT object
 583  *  \param  x      BIGNUM with x-coordinate
 584  *  \param  y_bit  integer with the y-Bit (either 0 or 1)
 585  *  \param  ctx    BN_CTX object (optional)
 586  *  \return 1 on success and 0 if an error occurred
 587  */
 588 int EC_POINT_set_compressed_coordinates(const EC_GROUP *group, EC_POINT *p,
 589                                         const BIGNUM *x, int y_bit,
 590                                         BN_CTX *ctx);
 591
 592 /** Sets the x9.62 compressed coordinates of a EC_POINT. A synonym of
 593  *  EC_POINT_set_compressed_coordinates
 594  *  \param  group  underlying EC_GROUP object
 595  *  \param  p      EC_POINT object
 596  *  \param  x      BIGNUM with x-coordinate
 597  *  \param  y_bit  integer with the y-Bit (either 0 or 1)
 598  *  \param  ctx    BN_CTX object (optional)
 599  *  \return 1 on success and 0 if an error occurred
 600  */
 601 DEPRECATEDIN_3(int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group,
 602                                                            EC_POINT *p,
 603                                                            const BIGNUM *x,
 604                                                            int y_bit,
 605                                                            BN_CTX *ctx))
 606 # ifndef OPENSSL_NO_EC2M
 607 /** Sets the affine coordinates of an EC_POINT. A synonym of
 608  *  EC_POINT_set_affine_coordinates
 609  *  \param  group  underlying EC_GROUP object
 610  *  \param  p      EC_POINT object
 611  *  \param  x      BIGNUM with the x-coordinate
 612  *  \param  y      BIGNUM with the y-coordinate
 613  *  \param  ctx    BN_CTX object (optional)
 614  *  \return 1 on success and 0 if an error occurred
 615  */
 616 DEPRECATEDIN_3(int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group,
 617                                                         EC_POINT *p,
 618                                                         const BIGNUM *x,
 619                                                         const BIGNUM *y,
 620                                                         BN_CTX *ctx))
 621
 622 /** Gets the affine coordinates of an EC_POINT. A synonym of
 623  *  EC_POINT_get_affine_coordinates
 624  *  \param  group  underlying EC_GROUP object
 625  *  \param  p      EC_POINT object
 626  *  \param  x      BIGNUM for the x-coordinate
 627  *  \param  y      BIGNUM for the y-coordinate
 628  *  \param  ctx    BN_CTX object (optional)
 629  *  \return 1 on success and 0 if an error occurred
 630  */
 631 DEPRECATEDIN_3(int EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *group,
 632                                                         const EC_POINT *p,
 633                                                         BIGNUM *x,
 634                                                         BIGNUM *y,
 635                                                         BN_CTX *ctx))
 636
 637 /** Sets the x9.62 compressed coordinates of a EC_POINT. A synonym of
 638  *  EC_POINT_set_compressed_coordinates
 639  *  \param  group  underlying EC_GROUP object
 640  *  \param  p      EC_POINT object
 641  *  \param  x      BIGNUM with x-coordinate
 642  *  \param  y_bit  integer with the y-Bit (either 0 or 1)
 643  *  \param  ctx    BN_CTX object (optional)
 644  *  \return 1 on success and 0 if an error occurred
 645  */
 646 DEPRECATEDIN_3(int EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *group,
 647                                                             EC_POINT *p,
 648                                                             const BIGNUM *x,
 649                                                             int y_bit,
 650                                                             BN_CTX *ctx))
 651 # endif
 652 /** Encodes a EC_POINT object to a octet string
 653  *  \param  group  underlying EC_GROUP object
 654  *  \param  p      EC_POINT object
 655  *  \param  form   point conversion form
 656  *  \param  buf    memory buffer for the result. If NULL the function returns
 657  *                 required buffer size.
 658  *  \param  len    length of the memory buffer
 659  *  \param  ctx    BN_CTX object (optional)
 660  *  \return the length of the encoded octet string or 0 if an error occurred
 661  */
 662 size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *p,
 663                           point_conversion_form_t form,
 664                           unsigned char *buf, size_t len, BN_CTX *ctx);
 665
 666 /** Decodes a EC_POINT from a octet string
 667  *  \param  group  underlying EC_GROUP object
 668  *  \param  p      EC_POINT object
 669  *  \param  buf    memory buffer with the encoded ec point
 670  *  \param  len    length of the encoded ec point
 671  *  \param  ctx    BN_CTX object (optional)
 672  *  \return 1 on success and 0 if an error occurred
 673  */
 674 int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *p,
 675                        const unsigned char *buf, size_t len, BN_CTX *ctx);
 676
 677 /** Encodes an EC_POINT object to an allocated octet string
 678  *  \param  group  underlying EC_GROUP object
 679  *  \param  point  EC_POINT object
 680  *  \param  form   point conversion form
 681  *  \param  pbuf   returns pointer to allocated buffer
 682  *  \param  ctx    BN_CTX object (optional)
 683  *  \return the length of the encoded octet string or 0 if an error occurred
 684  */
 685 size_t EC_POINT_point2buf(const EC_GROUP *group, const EC_POINT *point,
 686                           point_conversion_form_t form,
 687                           unsigned char **pbuf, BN_CTX *ctx);
 688
 689 /* other interfaces to point2oct/oct2point: */
 690 BIGNUM *EC_POINT_point2bn(const EC_GROUP *, const EC_POINT *,
 691                           point_conversion_form_t form, BIGNUM *, BN_CTX *);
 692 EC_POINT *EC_POINT_bn2point(const EC_GROUP *, const BIGNUM *,
 693                             EC_POINT *, BN_CTX *);
 694 char *EC_POINT_point2hex(const EC_GROUP *, const EC_POINT *,
 695                          point_conversion_form_t form, BN_CTX *);
 696 EC_POINT *EC_POINT_hex2point(const EC_GROUP *, const char *,
 697                              EC_POINT *, BN_CTX *);
 698
 699 /********************************************************************/
 700 /*         functions for doing EC_POINT arithmetic                  */
 701 /********************************************************************/
 702
 703 /** Computes the sum of two EC_POINT
 704  *  \param  group  underlying EC_GROUP object
 705  *  \param  r      EC_POINT object for the result (r = a + b)
 706  *  \param  a      EC_POINT object with the first summand
 707  *  \param  b      EC_POINT object with the second summand
 708  *  \param  ctx    BN_CTX object (optional)
 709  *  \return 1 on success and 0 if an error occurred
 710  */
 711 int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a,
 712                  const EC_POINT *b, BN_CTX *ctx);
 713
 714 /** Computes the double of a EC_POINT
 715  *  \param  group  underlying EC_GROUP object
 716  *  \param  r      EC_POINT object for the result (r = 2 * a)
 717  *  \param  a      EC_POINT object
 718  *  \param  ctx    BN_CTX object (optional)
 719  *  \return 1 on success and 0 if an error occurred
 720  */
 721 int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a,
 722                  BN_CTX *ctx);
 723
 724 /** Computes the inverse of a EC_POINT
 725  *  \param  group  underlying EC_GROUP object
 726  *  \param  a      EC_POINT object to be inverted (it's used for the result as well)
 727  *  \param  ctx    BN_CTX object (optional)
 728  *  \return 1 on success and 0 if an error occurred
 729  */
 730 int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx);
 731
 732 /** Checks whether the point is the neutral element of the group
 733  *  \param  group  the underlying EC_GROUP object
 734  *  \param  p      EC_POINT object
 735  *  \return 1 if the point is the neutral element and 0 otherwise
 736  */
 737 int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *p);
 738
 739 /** Checks whether the point is on the curve
 740  *  \param  group  underlying EC_GROUP object
 741  *  \param  point  EC_POINT object to check
 742  *  \param  ctx    BN_CTX object (optional)
 743  *  \return 1 if the point is on the curve, 0 if not, or -1 on error
 744  */
 745 int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point,
 746                          BN_CTX *ctx);
 747
 748 /** Compares two EC_POINTs
 749  *  \param  group  underlying EC_GROUP object
 750  *  \param  a      first EC_POINT object
 751  *  \param  b      second EC_POINT object
 752  *  \param  ctx    BN_CTX object (optional)
 753  *  \return 1 if the points are not equal, 0 if they are, or -1 on error
 754  */
 755 int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b,
 756                  BN_CTX *ctx);
 757
 758 int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx);
 759 int EC_POINTs_make_affine(const EC_GROUP *group, size_t num,
 760                           EC_POINT *points[], BN_CTX *ctx);
 761
 762 /** Computes r = generator * n + sum_{i=0}^{num-1} p[i] * m[i]
 763  *  \param  group  underlying EC_GROUP object
 764  *  \param  r      EC_POINT object for the result
 765  *  \param  n      BIGNUM with the multiplier for the group generator (optional)
 766  *  \param  num    number further summands
 767  *  \param  p      array of size num of EC_POINT objects
 768  *  \param  m      array of size num of BIGNUM objects
 769  *  \param  ctx    BN_CTX object (optional)
 770  *  \return 1 on success and 0 if an error occurred
 771  */
 772 int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *n,
 773                   size_t num, const EC_POINT *p[], const BIGNUM *m[],
 774                   BN_CTX *ctx);
 775
 776 /** Computes r = generator * n + q * m
 777  *  \param  group  underlying EC_GROUP object
 778  *  \param  r      EC_POINT object for the result
 779  *  \param  n      BIGNUM with the multiplier for the group generator (optional)
 780  *  \param  q      EC_POINT object with the first factor of the second summand
 781  *  \param  m      BIGNUM with the second factor of the second summand
 782  *  \param  ctx    BN_CTX object (optional)
 783  *  \return 1 on success and 0 if an error occurred
 784  */
 785 int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *n,
 786                  const EC_POINT *q, const BIGNUM *m, BN_CTX *ctx);
 787
 788 /** Stores multiples of generator for faster point multiplication
 789  *  \param  group  EC_GROUP object
 790  *  \param  ctx    BN_CTX object (optional)
 791  *  \return 1 on success and 0 if an error occurred
 792  */
 793 int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx);
 794
 795 /** Reports whether a precomputation has been done
 796  *  \param  group  EC_GROUP object
 797  *  \return 1 if a pre-computation has been done and 0 otherwise
 798  */
 799 int EC_GROUP_have_precompute_mult(const EC_GROUP *group);
 800
 801 /********************************************************************/
 802 /*                       ASN1 stuff                                 */
 803 /********************************************************************/
 804
 805 DECLARE_ASN1_ITEM(ECPKPARAMETERS)
 806 DECLARE_ASN1_ALLOC_FUNCTIONS(ECPKPARAMETERS)
 807 DECLARE_ASN1_ITEM(ECPARAMETERS)
 808 DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
 809
 810 /*
 811  * EC_GROUP_get_basis_type() returns the NID of the basis type used to
 812  * represent the field elements
 813  */
 814 int EC_GROUP_get_basis_type(const EC_GROUP *);
 815 # ifndef OPENSSL_NO_EC2M
 816 int EC_GROUP_get_trinomial_basis(const EC_GROUP *, unsigned int *k);
 817 int EC_GROUP_get_pentanomial_basis(const EC_GROUP *, unsigned int *k1,
 818                                    unsigned int *k2, unsigned int *k3);
 819 # endif
 820
 821 # define OPENSSL_EC_EXPLICIT_CURVE  0x000
 822 # define OPENSSL_EC_NAMED_CURVE     0x001
 823
 824 EC_GROUP *d2i_ECPKParameters(EC_GROUP **, const unsigned char **in, long len);
 825 int i2d_ECPKParameters(const EC_GROUP *, unsigned char **out);
 826
 827 # define d2i_ECPKParameters_bio(bp,x) ASN1_d2i_bio_of(EC_GROUP,NULL,d2i_ECPKParameters,bp,x)
 828 # define i2d_ECPKParameters_bio(bp,x) ASN1_i2d_bio_of(EC_GROUP,i2d_ECPKParameters,bp,x)
 829 # define d2i_ECPKParameters_fp(fp,x) (EC_GROUP *)ASN1_d2i_fp(NULL, \
 830                 (char *(*)())d2i_ECPKParameters,(fp),(unsigned char **)(x))
 831 # define i2d_ECPKParameters_fp(fp,x) ASN1_i2d_fp(i2d_ECPKParameters,(fp), \
 832                 (unsigned char *)(x))
 833
 834 int ECPKParameters_print(BIO *bp, const EC_GROUP *x, int off);
 835 # ifndef OPENSSL_NO_STDIO
 836 int ECPKParameters_print_fp(FILE *fp, const EC_GROUP *x, int off);
 837 # endif
 838
 839 /********************************************************************/
 840 /*                      EC_KEY functions                            */
 841 /********************************************************************/
 842
 843 /* some values for the encoding_flag */
 844 # define EC_PKEY_NO_PARAMETERS   0x001
 845 # define EC_PKEY_NO_PUBKEY       0x002
 846
 847 /* some values for the flags field */
 848 # define EC_FLAG_NON_FIPS_ALLOW  0x1
 849 # define EC_FLAG_FIPS_CHECKED    0x2
 850 # define EC_FLAG_COFACTOR_ECDH   0x1000
 851
 852 /**
 853  *  Creates a new EC_KEY object.
 854  *  \param  ctx  The library context for to use for this EC_KEY. May be NULL in
 855  *               which case the default library context is used.
 856  *  \return EC_KEY object or NULL if an error occurred.
 857  */
 858 EC_KEY *EC_KEY_new_ex(OPENSSL_CTX *ctx);
 859
 860 /**
 861  *  Creates a new EC_KEY object. Same as calling EC_KEY_new_ex with a NULL
 862  *  library context
 863  *  \return EC_KEY object or NULL if an error occurred.
 864  */
 865 EC_KEY *EC_KEY_new(void);
 866
 867 int EC_KEY_get_flags(const EC_KEY *key);
 868
 869 void EC_KEY_set_flags(EC_KEY *key, int flags);
 870
 871 void EC_KEY_clear_flags(EC_KEY *key, int flags);
 872
 873 /**
 874  *  Creates a new EC_KEY object using a named curve as underlying
 875  *  EC_GROUP object.
 876  *  \param  ctx  The library context for to use for this EC_KEY. May be NULL in
 877  *               which case the default library context is used.
 878  *  \param  nid  NID of the named curve.
 879  *  \return EC_KEY object or NULL if an error occurred.
 880  */
 881 EC_KEY *EC_KEY_new_by_curve_name_ex(OPENSSL_CTX *ctx, int nid);
 882
 883 /**
 884  *  Creates a new EC_KEY object using a named curve as underlying
 885  *  EC_GROUP object. Same as calling EC_KEY_new_by_curve_name_ex with a NULL
 886  *  library context.
 887  *  \param  nid  NID of the named curve.
 888  *  \return EC_KEY object or NULL if an error occurred.
 889  */
 890 EC_KEY *EC_KEY_new_by_curve_name(int nid);
 891
 892
 893 /** Frees a EC_KEY object.
 894  *  \param  key  EC_KEY object to be freed.
 895  */
 896 void EC_KEY_free(EC_KEY *key);
 897
 898 /** Copies a EC_KEY object.
 899  *  \param  dst  destination EC_KEY object
 900  *  \param  src  src EC_KEY object
 901  *  \return dst or NULL if an error occurred.
 902  */
 903 EC_KEY *EC_KEY_copy(EC_KEY *dst, const EC_KEY *src);
 904
 905 /** Creates a new EC_KEY object and copies the content from src to it.
 906  *  \param  src  the source EC_KEY object
 907  *  \return newly created EC_KEY object or NULL if an error occurred.
 908  */
 909 EC_KEY *EC_KEY_dup(const EC_KEY *src);
 910
 911 /** Increases the internal reference count of a EC_KEY object.
 912  *  \param  key  EC_KEY object
 913  *  \return 1 on success and 0 if an error occurred.
 914  */
 915 int EC_KEY_up_ref(EC_KEY *key);
 916
 917 /** Returns the ENGINE object of a EC_KEY object
 918  *  \param  eckey  EC_KEY object
 919  *  \return the ENGINE object (possibly NULL).
 920  */
 921 ENGINE *EC_KEY_get0_engine(const EC_KEY *eckey);
 922
 923 /** Returns the EC_GROUP object of a EC_KEY object
 924  *  \param  key  EC_KEY object
 925  *  \return the EC_GROUP object (possibly NULL).
 926  */
 927 const EC_GROUP *EC_KEY_get0_group(const EC_KEY *key);
 928
 929 /** Sets the EC_GROUP of a EC_KEY object.
 930  *  \param  key    EC_KEY object
 931  *  \param  group  EC_GROUP to use in the EC_KEY object (note: the EC_KEY
 932  *                 object will use an own copy of the EC_GROUP).
 933  *  \return 1 on success and 0 if an error occurred.
 934  */
 935 int EC_KEY_set_group(EC_KEY *key, const EC_GROUP *group);
 936
 937 /** Returns the private key of a EC_KEY object.
 938  *  \param  key  EC_KEY object
 939  *  \return a BIGNUM with the private key (possibly NULL).
 940  */
 941 const BIGNUM *EC_KEY_get0_private_key(const EC_KEY *key);
 942
 943 /** Sets the private key of a EC_KEY object.
 944  *  \param  key  EC_KEY object
 945  *  \param  prv  BIGNUM with the private key (note: the EC_KEY object
 946  *               will use an own copy of the BIGNUM).
 947  *  \return 1 on success and 0 if an error occurred.
 948  */
 949 int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *prv);
 950
 951 /** Returns the public key of a EC_KEY object.
 952  *  \param  key  the EC_KEY object
 953  *  \return a EC_POINT object with the public key (possibly NULL)
 954  */
 955 const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *key);
 956
 957 /** Sets the public key of a EC_KEY object.
 958  *  \param  key  EC_KEY object
 959  *  \param  pub  EC_POINT object with the public key (note: the EC_KEY object
 960  *               will use an own copy of the EC_POINT object).
 961  *  \return 1 on success and 0 if an error occurred.
 962  */
 963 int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub);
 964
 965 unsigned EC_KEY_get_enc_flags(const EC_KEY *key);
 966 void EC_KEY_set_enc_flags(EC_KEY *eckey, unsigned int flags);
 967 point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key);
 968 void EC_KEY_set_conv_form(EC_KEY *eckey, point_conversion_form_t cform);
 969
 970 #define EC_KEY_get_ex_new_index(l, p, newf, dupf, freef) \
 971     CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_EC_KEY, l, p, newf, dupf, freef)
 972 int EC_KEY_set_ex_data(EC_KEY *key, int idx, void *arg);
 973 void *EC_KEY_get_ex_data(const EC_KEY *key, int idx);
 974
 975 /* wrapper functions for the underlying EC_GROUP object */
 976 void EC_KEY_set_asn1_flag(EC_KEY *eckey, int asn1_flag);
 977
 978 /** Creates a table of pre-computed multiples of the generator to
 979  *  accelerate further EC_KEY operations.
 980  *  \param  key  EC_KEY object
 981  *  \param  ctx  BN_CTX object (optional)
 982  *  \return 1 on success and 0 if an error occurred.
 983  */
 984 int EC_KEY_precompute_mult(EC_KEY *key, BN_CTX *ctx);
 985
 986 /** Creates a new ec private (and optional a new public) key.
 987  *  \param  key  EC_KEY object
 988  *  \return 1 on success and 0 if an error occurred.
 989  */
 990 int EC_KEY_generate_key(EC_KEY *key);
 991
 992 /** Verifies that a private and/or public key is valid.
 993  *  \param  key  the EC_KEY object
 994  *  \return 1 on success and 0 otherwise.
 995  */
 996 int EC_KEY_check_key(const EC_KEY *key);
 997
 998 /** Indicates if an EC_KEY can be used for signing.
 999  *  \param  eckey  the EC_KEY object
1000  *  \return 1 if can can sign and 0 otherwise.
1001  */
1002 int EC_KEY_can_sign(const EC_KEY *eckey);
1003
1004 /** Sets a public key from affine coordinates performing
1005  *  necessary NIST PKV tests.
1006  *  \param  key  the EC_KEY object
1007  *  \param  x    public key x coordinate
1008  *  \param  y    public key y coordinate
1009  *  \return 1 on success and 0 otherwise.
1010  */
1011 int EC_KEY_set_public_key_affine_coordinates(EC_KEY *key, BIGNUM *x,
1012                                              BIGNUM *y);
1013
1014 /** Encodes an EC_KEY public key to an allocated octet string
1015  *  \param  key    key to encode
1016  *  \param  form   point conversion form
1017  *  \param  pbuf   returns pointer to allocated buffer
1018  *  \param  ctx    BN_CTX object (optional)
1019  *  \return the length of the encoded octet string or 0 if an error occurred
1020  */
1021 size_t EC_KEY_key2buf(const EC_KEY *key, point_conversion_form_t form,
1022                       unsigned char **pbuf, BN_CTX *ctx);
1023
1024 /** Decodes a EC_KEY public key from a octet string
1025  *  \param  key    key to decode
1026  *  \param  buf    memory buffer with the encoded ec point
1027  *  \param  len    length of the encoded ec point
1028  *  \param  ctx    BN_CTX object (optional)
1029  *  \return 1 on success and 0 if an error occurred
1030  */
1031
1032 int EC_KEY_oct2key(EC_KEY *key, const unsigned char *buf, size_t len,
1033                    BN_CTX *ctx);
1034
1035 /** Decodes an EC_KEY private key from an octet string
1036  *  \param  key    key to decode
1037  *  \param  buf    memory buffer with the encoded private key
1038  *  \param  len    length of the encoded key
1039  *  \return 1 on success and 0 if an error occurred
1040  */
1041
1042 int EC_KEY_oct2priv(EC_KEY *key, const unsigned char *buf, size_t len);
1043
1044 /** Encodes a EC_KEY private key to an octet string
1045  *  \param  key    key to encode
1046  *  \param  buf    memory buffer for the result. If NULL the function returns
1047  *                 required buffer size.
1048  *  \param  len    length of the memory buffer
1049  *  \return the length of the encoded octet string or 0 if an error occurred
1050  */
1051
1052 size_t EC_KEY_priv2oct(const EC_KEY *key, unsigned char *buf, size_t len);
1053
1054 /** Encodes an EC_KEY private key to an allocated octet string
1055  *  \param  eckey  key to encode
1056  *  \param  pbuf   returns pointer to allocated buffer
1057  *  \return the length of the encoded octet string or 0 if an error occurred
1058  */
1059 size_t EC_KEY_priv2buf(const EC_KEY *eckey, unsigned char **pbuf);
1060
1061 /********************************************************************/
1062 /*        de- and encoding functions for SEC1 ECPrivateKey          */
1063 /********************************************************************/
1064
1065 /** Decodes a private key from a memory buffer.
1066  *  \param  key  a pointer to a EC_KEY object which should be used (or NULL)
1067  *  \param  in   pointer to memory with the DER encoded private key
1068  *  \param  len  length of the DER encoded private key
1069  *  \return the decoded private key or NULL if an error occurred.
1070  */
1071 EC_KEY *d2i_ECPrivateKey(EC_KEY **key, const unsigned char **in, long len);
1072
1073 /** Encodes a private key object and stores the result in a buffer.
1074  *  \param  key  the EC_KEY object to encode
1075  *  \param  out  the buffer for the result (if NULL the function returns number
1076  *               of bytes needed).
1077  *  \return 1 on success and 0 if an error occurred.
1078  */
1079 int i2d_ECPrivateKey(const EC_KEY *key, unsigned char **out);
1080
1081 /********************************************************************/
1082 /*        de- and encoding functions for EC parameters              */
1083 /********************************************************************/
1084
1085 /** Decodes ec parameter from a memory buffer.
1086  *  \param  key  a pointer to a EC_KEY object which should be used (or NULL)
1087  *  \param  in   pointer to memory with the DER encoded ec parameters
1088  *  \param  len  length of the DER encoded ec parameters
1089  *  \return a EC_KEY object with the decoded parameters or NULL if an error
1090  *          occurred.
1091  */
1092 EC_KEY *d2i_ECParameters(EC_KEY **key, const unsigned char **in, long len);
1093
1094 /** Encodes ec parameter and stores the result in a buffer.
1095  *  \param  key  the EC_KEY object with ec parameters to encode
1096  *  \param  out  the buffer for the result (if NULL the function returns number
1097  *               of bytes needed).
1098  *  \return 1 on success and 0 if an error occurred.
1099  */
1100 int i2d_ECParameters(const EC_KEY *key, unsigned char **out);
1101
1102 /********************************************************************/
1103 /*         de- and encoding functions for EC public key             */
1104 /*         (octet string, not DER -- hence 'o2i' and 'i2o')         */
1105 /********************************************************************/
1106
1107 /** Decodes a ec public key from a octet string.
1108  *  \param  key  a pointer to a EC_KEY object which should be used
1109  *  \param  in   memory buffer with the encoded public key
1110  *  \param  len  length of the encoded public key
1111  *  \return EC_KEY object with decoded public key or NULL if an error
1112  *          occurred.
1113  */
1114 EC_KEY *o2i_ECPublicKey(EC_KEY **key, const unsigned char **in, long len);
1115
1116 /** Encodes a ec public key in an octet string.
1117  *  \param  key  the EC_KEY object with the public key
1118  *  \param  out  the buffer for the result (if NULL the function returns number
1119  *               of bytes needed).
1120  *  \return 1 on success and 0 if an error occurred
1121  */
1122 int i2o_ECPublicKey(const EC_KEY *key, unsigned char **out);
1123
1124 /** Prints out the ec parameters on human readable form.
1125  *  \param  bp   BIO object to which the information is printed
1126  *  \param  key  EC_KEY object
1127  *  \return 1 on success and 0 if an error occurred
1128  */
1129 int ECParameters_print(BIO *bp, const EC_KEY *key);
1130
1131 /** Prints out the contents of a EC_KEY object
1132  *  \param  bp   BIO object to which the information is printed
1133  *  \param  key  EC_KEY object
1134  *  \param  off  line offset
1135  *  \return 1 on success and 0 if an error occurred
1136  */
1137 int EC_KEY_print(BIO *bp, const EC_KEY *key, int off);
1138
1139 # ifndef OPENSSL_NO_STDIO
1140 /** Prints out the ec parameters on human readable form.
1141  *  \param  fp   file descriptor to which the information is printed
1142  *  \param  key  EC_KEY object
1143  *  \return 1 on success and 0 if an error occurred
1144  */
1145 int ECParameters_print_fp(FILE *fp, const EC_KEY *key);
1146
1147 /** Prints out the contents of a EC_KEY object
1148  *  \param  fp   file descriptor to which the information is printed
1149  *  \param  key  EC_KEY object
1150  *  \param  off  line offset
1151  *  \return 1 on success and 0 if an error occurred
1152  */
1153 int EC_KEY_print_fp(FILE *fp, const EC_KEY *key, int off);
1154
1155 # endif
1156
1157 const EC_KEY_METHOD *EC_KEY_OpenSSL(void);
1158 const EC_KEY_METHOD *EC_KEY_get_default_method(void);
1159 void EC_KEY_set_default_method(const EC_KEY_METHOD *meth);
1160 const EC_KEY_METHOD *EC_KEY_get_method(const EC_KEY *key);
1161 int EC_KEY_set_method(EC_KEY *key, const EC_KEY_METHOD *meth);
1162 EC_KEY *EC_KEY_new_method(ENGINE *engine);
1163
1164 /** The old name for ecdh_KDF_X9_63
1165  *  The ECDH KDF specification has been mistakingly attributed to ANSI X9.62,
1166  *  it is actually specified in ANSI X9.63.
1167  *  This identifier is retained for backwards compatibility
1168  */
1169 DEPRECATEDIN_3(int ECDH_KDF_X9_62(unsigned char *out, size_t outlen,
1170                                   const unsigned char *Z, size_t Zlen,
1171                                   const unsigned char *sinfo, size_t sinfolen,
1172                                   const EVP_MD *md))
1173
1174 int ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
1175                      const EC_KEY *ecdh,
1176                      void *(*KDF) (const void *in, size_t inlen,
1177                                    void *out, size_t *outlen));
1178
1179 typedef struct ECDSA_SIG_st ECDSA_SIG;
1180
1181 /** Allocates and initialize a ECDSA_SIG structure
1182  *  \return pointer to a ECDSA_SIG structure or NULL if an error occurred
1183  */
1184 ECDSA_SIG *ECDSA_SIG_new(void);
1185
1186 /** frees a ECDSA_SIG structure
1187  *  \param  sig  pointer to the ECDSA_SIG structure
1188  */
1189 void ECDSA_SIG_free(ECDSA_SIG *sig);
1190
1191 /** i2d_ECDSA_SIG encodes content of ECDSA_SIG (note: this function modifies *pp
1192  *  (*pp += length of the DER encoded signature)).
1193  *  \param  sig  pointer to the ECDSA_SIG object
1194  *  \param  pp   pointer to a unsigned char pointer for the output or NULL
1195  *  \return the length of the DER encoded ECDSA_SIG object or a negative value
1196  *          on error
1197  */
1198 DECLARE_ASN1_ENCODE_FUNCTIONS_only(ECDSA_SIG, ECDSA_SIG)
1199
1200 /** d2i_ECDSA_SIG decodes an ECDSA signature (note: this function modifies *pp
1201  *  (*pp += len)).
1202  *  \param  sig  pointer to ECDSA_SIG pointer (may be NULL)
1203  *  \param  pp   memory buffer with the DER encoded signature
1204  *  \param  len  length of the buffer
1205  *  \return pointer to the decoded ECDSA_SIG structure (or NULL)
1206  */
1207
1208 /** Accessor for r and s fields of ECDSA_SIG
1209  *  \param  sig  pointer to ECDSA_SIG structure
1210  *  \param  pr   pointer to BIGNUM pointer for r (may be NULL)
1211  *  \param  ps   pointer to BIGNUM pointer for s (may be NULL)
1212  */
1213 void ECDSA_SIG_get0(const ECDSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps);
1214
1215 /** Accessor for r field of ECDSA_SIG
1216  *  \param  sig  pointer to ECDSA_SIG structure
1217  */
1218 const BIGNUM *ECDSA_SIG_get0_r(const ECDSA_SIG *sig);
1219
1220 /** Accessor for s field of ECDSA_SIG
1221  *  \param  sig  pointer to ECDSA_SIG structure
1222  */
1223 const BIGNUM *ECDSA_SIG_get0_s(const ECDSA_SIG *sig);
1224
1225 /** Setter for r and s fields of ECDSA_SIG
1226  *  \param  sig  pointer to ECDSA_SIG structure
1227  *  \param  r    pointer to BIGNUM for r (may be NULL)
1228  *  \param  s    pointer to BIGNUM for s (may be NULL)
1229  */
1230 int ECDSA_SIG_set0(ECDSA_SIG *sig, BIGNUM *r, BIGNUM *s);
1231
1232 /** Computes the ECDSA signature of the given hash value using
1233  *  the supplied private key and returns the created signature.
1234  *  \param  dgst      pointer to the hash value
1235  *  \param  dgst_len  length of the hash value
1236  *  \param  eckey     EC_KEY object containing a private EC key
1237  *  \return pointer to a ECDSA_SIG structure or NULL if an error occurred
1238  */
1239 ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst, int dgst_len,
1240                          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  dgst     pointer to the hash value to sign
1245  *  \param  dgstlen  length of the hash value
1246  *  \param  kinv     BIGNUM with a pre-computed inverse k (optional)
1247  *  \param  rp       BIGNUM with a pre-computed rp value (optional),
1248  *                   see ECDSA_sign_setup
1249  *  \param  eckey    EC_KEY object containing a private EC key
1250  *  \return pointer to a ECDSA_SIG structure or NULL if an error occurred
1251  */
1252 ECDSA_SIG *ECDSA_do_sign_ex(const unsigned char *dgst, int dgstlen,
1253                             const BIGNUM *kinv, const BIGNUM *rp,
1254                             EC_KEY *eckey);
1255
1256 /** Verifies that the supplied signature is a valid ECDSA
1257  *  signature of the supplied hash value using the supplied public key.
1258  *  \param  dgst      pointer to the hash value
1259  *  \param  dgst_len  length of the hash value
1260  *  \param  sig       ECDSA_SIG structure
1261  *  \param  eckey     EC_KEY object containing a public EC key
1262  *  \return 1 if the signature is valid, 0 if the signature is invalid
1263  *          and -1 on error
1264  */
1265 int ECDSA_do_verify(const unsigned char *dgst, int dgst_len,
1266                     const ECDSA_SIG *sig, EC_KEY *eckey);
1267
1268 /** Precompute parts of the signing operation
1269  *  \param  eckey  EC_KEY object containing a private EC key
1270  *  \param  ctx    BN_CTX object (optional)
1271  *  \param  kinv   BIGNUM pointer for the inverse of k
1272  *  \param  rp     BIGNUM pointer for x coordinate of k * generator
1273  *  \return 1 on success and 0 otherwise
1274  */
1275 int ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx, BIGNUM **kinv, BIGNUM **rp);
1276
1277 /** Computes ECDSA signature of a given hash value using the supplied
1278  *  private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
1279  *  \param  type     this parameter is ignored
1280  *  \param  dgst     pointer to the hash value to sign
1281  *  \param  dgstlen  length of the hash value
1282  *  \param  sig      memory for the DER encoded created signature
1283  *  \param  siglen   pointer to the length of the returned signature
1284  *  \param  eckey    EC_KEY object containing a private EC key
1285  *  \return 1 on success and 0 otherwise
1286  */
1287 int ECDSA_sign(int type, const unsigned char *dgst, int dgstlen,
1288                unsigned char *sig, unsigned int *siglen, EC_KEY *eckey);
1289
1290 /** Computes ECDSA signature of a given hash value using the supplied
1291  *  private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
1292  *  \param  type     this parameter is ignored
1293  *  \param  dgst     pointer to the hash value to sign
1294  *  \param  dgstlen  length of the hash value
1295  *  \param  sig      buffer to hold the DER encoded signature
1296  *  \param  siglen   pointer to the length of the returned signature
1297  *  \param  kinv     BIGNUM with a pre-computed inverse k (optional)
1298  *  \param  rp       BIGNUM with a pre-computed rp value (optional),
1299  *                   see ECDSA_sign_setup
1300  *  \param  eckey    EC_KEY object containing a private EC key
1301  *  \return 1 on success and 0 otherwise
1302  */
1303 int ECDSA_sign_ex(int type, const unsigned char *dgst, int dgstlen,
1304                   unsigned char *sig, unsigned int *siglen,
1305                   const BIGNUM *kinv, const BIGNUM *rp, EC_KEY *eckey);
1306
1307 /** Verifies that the given signature is valid ECDSA signature
1308  *  of the supplied hash value using the specified public key.
1309  *  \param  type     this parameter is ignored
1310  *  \param  dgst     pointer to the hash value
1311  *  \param  dgstlen  length of the hash value
1312  *  \param  sig      pointer to the DER encoded signature
1313  *  \param  siglen   length of the DER encoded signature
1314  *  \param  eckey    EC_KEY object containing a public EC key
1315  *  \return 1 if the signature is valid, 0 if the signature is invalid
1316  *          and -1 on error
1317  */
1318 int ECDSA_verify(int type, const unsigned char *dgst, int dgstlen,
1319                  const unsigned char *sig, int siglen, EC_KEY *eckey);
1320
1321 /** Returns the maximum length of the DER encoded signature
1322  *  \param  eckey  EC_KEY object
1323  *  \return numbers of bytes required for the DER encoded signature
1324  */
1325 int ECDSA_size(const EC_KEY *eckey);
1326
1327 /********************************************************************/
1328 /*  EC_KEY_METHOD constructors, destructors, writers and accessors  */
1329 /********************************************************************/
1330
1331 EC_KEY_METHOD *EC_KEY_METHOD_new(const EC_KEY_METHOD *meth);
1332 void EC_KEY_METHOD_free(EC_KEY_METHOD *meth);
1333 void EC_KEY_METHOD_set_init(EC_KEY_METHOD *meth,
1334                             int (*init)(EC_KEY *key),
1335                             void (*finish)(EC_KEY *key),
1336                             int (*copy)(EC_KEY *dest, const EC_KEY *src),
1337                             int (*set_group)(EC_KEY *key, const EC_GROUP *grp),
1338                             int (*set_private)(EC_KEY *key,
1339                                                const BIGNUM *priv_key),
1340                             int (*set_public)(EC_KEY *key,
1341                                               const EC_POINT *pub_key));
1342
1343 void EC_KEY_METHOD_set_keygen(EC_KEY_METHOD *meth,
1344                               int (*keygen)(EC_KEY *key));
1345
1346 void EC_KEY_METHOD_set_compute_key(EC_KEY_METHOD *meth,
1347                                    int (*ckey)(unsigned char **psec,
1348                                                size_t *pseclen,
1349                                                const EC_POINT *pub_key,
1350                                                const EC_KEY *ecdh));
1351
1352 void EC_KEY_METHOD_set_sign(EC_KEY_METHOD *meth,
1353                             int (*sign)(int type, const unsigned char *dgst,
1354                                         int dlen, unsigned char *sig,
1355                                         unsigned int *siglen,
1356                                         const BIGNUM *kinv, const BIGNUM *r,
1357                                         EC_KEY *eckey),
1358                             int (*sign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
1359                                               BIGNUM **kinvp, BIGNUM **rp),
1360                             ECDSA_SIG *(*sign_sig)(const unsigned char *dgst,
1361                                                    int dgst_len,
1362                                                    const BIGNUM *in_kinv,
1363                                                    const BIGNUM *in_r,
1364                                                    EC_KEY *eckey));
1365
1366 void EC_KEY_METHOD_set_verify(EC_KEY_METHOD *meth,
1367                               int (*verify)(int type, const unsigned
1368                                             char *dgst, int dgst_len,
1369                                             const unsigned char *sigbuf,
1370                                             int sig_len, EC_KEY *eckey),
1371                               int (*verify_sig)(const unsigned char *dgst,
1372                                                 int dgst_len,
1373                                                 const ECDSA_SIG *sig,
1374                                                 EC_KEY *eckey));
1375
1376 void EC_KEY_METHOD_get_init(const EC_KEY_METHOD *meth,
1377                             int (**pinit)(EC_KEY *key),
1378                             void (**pfinish)(EC_KEY *key),
1379                             int (**pcopy)(EC_KEY *dest, const EC_KEY *src),
1380                             int (**pset_group)(EC_KEY *key,
1381                                                const EC_GROUP *grp),
1382                             int (**pset_private)(EC_KEY *key,
1383                                                  const BIGNUM *priv_key),
1384                             int (**pset_public)(EC_KEY *key,
1385                                                 const EC_POINT *pub_key));
1386
1387 void EC_KEY_METHOD_get_keygen(const EC_KEY_METHOD *meth,
1388                               int (**pkeygen)(EC_KEY *key));
1389
1390 void EC_KEY_METHOD_get_compute_key(const EC_KEY_METHOD *meth,
1391                                    int (**pck)(unsigned char **psec,
1392                                                size_t *pseclen,
1393                                                const EC_POINT *pub_key,
1394                                                const EC_KEY *ecdh));
1395
1396 void EC_KEY_METHOD_get_sign(const EC_KEY_METHOD *meth,
1397                             int (**psign)(int type, const unsigned char *dgst,
1398                                           int dlen, unsigned char *sig,
1399                                           unsigned int *siglen,
1400                                           const BIGNUM *kinv, const BIGNUM *r,
1401                                           EC_KEY *eckey),
1402                             int (**psign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
1403                                                 BIGNUM **kinvp, BIGNUM **rp),
1404                             ECDSA_SIG *(**psign_sig)(const unsigned char *dgst,
1405                                                      int dgst_len,
1406                                                      const BIGNUM *in_kinv,
1407                                                      const BIGNUM *in_r,
1408                                                      EC_KEY *eckey));
1409
1410 void EC_KEY_METHOD_get_verify(const EC_KEY_METHOD *meth,
1411                               int (**pverify)(int type, const unsigned
1412                                               char *dgst, int dgst_len,
1413                                               const unsigned char *sigbuf,
1414                                               int sig_len, EC_KEY *eckey),
1415                               int (**pverify_sig)(const unsigned char *dgst,
1416                                                   int dgst_len,
1417                                                   const ECDSA_SIG *sig,
1418                                                   EC_KEY *eckey));
1419
1420 # define ECParameters_dup(x) ASN1_dup_of(EC_KEY,i2d_ECParameters,d2i_ECParameters,x)
1421
1422 # ifndef __cplusplus
1423 #  if defined(__SUNPRO_C)
1424 #   if __SUNPRO_C >= 0x520
1425 #    pragma error_messages (default,E_ARRAY_OF_INCOMPLETE_NONAME,E_ARRAY_OF_INCOMPLETE)
1426 #   endif
1427 #  endif
1428 # endif
1429
1430 # define EVP_PKEY_CTX_set_ec_paramgen_curve_nid(ctx, nid) \
1431         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1432                                 EVP_PKEY_OP_PARAMGEN|EVP_PKEY_OP_KEYGEN, \
1433                                 EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID, nid, NULL)
1434
1435 # define EVP_PKEY_CTX_set_ec_param_enc(ctx, flag) \
1436         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1437                                 EVP_PKEY_OP_PARAMGEN|EVP_PKEY_OP_KEYGEN, \
1438                                 EVP_PKEY_CTRL_EC_PARAM_ENC, flag, NULL)
1439
1440 # define EVP_PKEY_CTX_set_ecdh_cofactor_mode(ctx, flag) \
1441         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1442                                 EVP_PKEY_OP_DERIVE, \
1443                                 EVP_PKEY_CTRL_EC_ECDH_COFACTOR, flag, NULL)
1444
1445 # define EVP_PKEY_CTX_get_ecdh_cofactor_mode(ctx) \
1446         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1447                                 EVP_PKEY_OP_DERIVE, \
1448                                 EVP_PKEY_CTRL_EC_ECDH_COFACTOR, -2, NULL)
1449
1450 # define EVP_PKEY_CTX_set_ecdh_kdf_type(ctx, kdf) \
1451         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1452                                 EVP_PKEY_OP_DERIVE, \
1453                                 EVP_PKEY_CTRL_EC_KDF_TYPE, kdf, NULL)
1454
1455 # define EVP_PKEY_CTX_get_ecdh_kdf_type(ctx) \
1456         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1457                                 EVP_PKEY_OP_DERIVE, \
1458                                 EVP_PKEY_CTRL_EC_KDF_TYPE, -2, NULL)
1459
1460 # define EVP_PKEY_CTX_set_ecdh_kdf_md(ctx, md) \
1461         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1462                                 EVP_PKEY_OP_DERIVE, \
1463                                 EVP_PKEY_CTRL_EC_KDF_MD, 0, (void *)(md))
1464
1465 # define EVP_PKEY_CTX_get_ecdh_kdf_md(ctx, pmd) \
1466         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1467                                 EVP_PKEY_OP_DERIVE, \
1468                                 EVP_PKEY_CTRL_GET_EC_KDF_MD, 0, (void *)(pmd))
1469
1470 # define EVP_PKEY_CTX_set_ecdh_kdf_outlen(ctx, len) \
1471         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1472                                 EVP_PKEY_OP_DERIVE, \
1473                                 EVP_PKEY_CTRL_EC_KDF_OUTLEN, len, NULL)
1474
1475 # define EVP_PKEY_CTX_get_ecdh_kdf_outlen(ctx, plen) \
1476         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1477                                 EVP_PKEY_OP_DERIVE, \
1478                                 EVP_PKEY_CTRL_GET_EC_KDF_OUTLEN, 0, \
1479                                 (void *)(plen))
1480
1481 # define EVP_PKEY_CTX_set0_ecdh_kdf_ukm(ctx, p, plen) \
1482         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1483                                 EVP_PKEY_OP_DERIVE, \
1484                                 EVP_PKEY_CTRL_EC_KDF_UKM, plen, (void *)(p))
1485
1486 # define EVP_PKEY_CTX_get0_ecdh_kdf_ukm(ctx, p) \
1487         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1488                                 EVP_PKEY_OP_DERIVE, \
1489                                 EVP_PKEY_CTRL_GET_EC_KDF_UKM, 0, (void *)(p))
1490
1491 /* SM2 will skip the operation check so no need to pass operation here */
1492 # define EVP_PKEY_CTX_set1_id(ctx, id, id_len) \
1493         EVP_PKEY_CTX_ctrl(ctx, -1, -1, \
1494                                 EVP_PKEY_CTRL_SET1_ID, (int)id_len, (void*)(id))
1495 # define EVP_PKEY_CTX_get1_id(ctx, id) \
1496         EVP_PKEY_CTX_ctrl(ctx, -1, -1, \
1497                                 EVP_PKEY_CTRL_GET1_ID, 0, (void*)(id))
1498
1499 # define EVP_PKEY_CTX_get1_id_len(ctx, id_len) \
1500         EVP_PKEY_CTX_ctrl(ctx, -1, -1, \
1501                                 EVP_PKEY_CTRL_GET1_ID_LEN, 0, (void*)(id_len))
1502
1503 # define EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID             (EVP_PKEY_ALG_CTRL + 1)
1504 # define EVP_PKEY_CTRL_EC_PARAM_ENC                      (EVP_PKEY_ALG_CTRL + 2)
1505 # define EVP_PKEY_CTRL_EC_ECDH_COFACTOR                  (EVP_PKEY_ALG_CTRL + 3)
1506 # define EVP_PKEY_CTRL_EC_KDF_TYPE                       (EVP_PKEY_ALG_CTRL + 4)
1507 # define EVP_PKEY_CTRL_EC_KDF_MD                         (EVP_PKEY_ALG_CTRL + 5)
1508 # define EVP_PKEY_CTRL_GET_EC_KDF_MD                     (EVP_PKEY_ALG_CTRL + 6)
1509 # define EVP_PKEY_CTRL_EC_KDF_OUTLEN                     (EVP_PKEY_ALG_CTRL + 7)
1510 # define EVP_PKEY_CTRL_GET_EC_KDF_OUTLEN                 (EVP_PKEY_ALG_CTRL + 8)
1511 # define EVP_PKEY_CTRL_EC_KDF_UKM                        (EVP_PKEY_ALG_CTRL + 9)
1512 # define EVP_PKEY_CTRL_GET_EC_KDF_UKM                    (EVP_PKEY_ALG_CTRL + 10)
1513 # define EVP_PKEY_CTRL_SET1_ID                           (EVP_PKEY_ALG_CTRL + 11)
1514 # define EVP_PKEY_CTRL_GET1_ID                           (EVP_PKEY_ALG_CTRL + 12)
1515 # define EVP_PKEY_CTRL_GET1_ID_LEN                       (EVP_PKEY_ALG_CTRL + 13)
1516 /* KDF types */
1517 # define EVP_PKEY_ECDH_KDF_NONE                          1
1518 # define EVP_PKEY_ECDH_KDF_X9_63                         2
1519 /** The old name for EVP_PKEY_ECDH_KDF_X9_63
1520  *  The ECDH KDF specification has been mistakingly attributed to ANSI X9.62,
1521  *  it is actually specified in ANSI X9.63.
1522  *  This identifier is retained for backwards compatibility
1523  */
1524 # define EVP_PKEY_ECDH_KDF_X9_62   EVP_PKEY_ECDH_KDF_X9_63
1525
1526
1527 #  ifdef  __cplusplus
1528 }
1529 #  endif
1530 # endif
1531 #endif