include/openssl/ec.h

   1 /* crypto/ec/ec.h */
   2 /*
   3  * Originally written by Bodo Moeller for the OpenSSL project.
   4  */
   5 /**
   6  * \file crypto/ec/ec.h Include file for the OpenSSL EC functions
   7  * \author Originally written by Bodo Moeller for the OpenSSL project
   8  */
   9 /* ====================================================================
  10  * Copyright (c) 1998-2005 The OpenSSL Project.  All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  *
  16  * 1. Redistributions of source code must retain the above copyright
  17  *    notice, this list of conditions and the following disclaimer.
  18  *
  19  * 2. Redistributions in binary form must reproduce the above copyright
  20  *    notice, this list of conditions and the following disclaimer in
  21  *    the documentation and/or other materials provided with the
  22  *    distribution.
  23  *
  24  * 3. All advertising materials mentioning features or use of this
  25  *    software must display the following acknowledgment:
  26  *    "This product includes software developed by the OpenSSL Project
  27  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  28  *
  29  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  30  *    endorse or promote products derived from this software without
  31  *    prior written permission. For written permission, please contact
  32  *    openssl-core@openssl.org.
  33  *
  34  * 5. Products derived from this software may not be called "OpenSSL"
  35  *    nor may "OpenSSL" appear in their names without prior written
  36  *    permission of the OpenSSL Project.
  37  *
  38  * 6. Redistributions of any form whatsoever must retain the following
  39  *    acknowledgment:
  40  *    "This product includes software developed by the OpenSSL Project
  41  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  44  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  46  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  47  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  48  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  49  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  50  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  52  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  53  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  54  * OF THE POSSIBILITY OF SUCH DAMAGE.
  55  * ====================================================================
  56  *
  57  * This product includes cryptographic software written by Eric Young
  58  * (eay@cryptsoft.com).  This product includes software written by Tim
  59  * Hudson (tjh@cryptsoft.com).
  60  *
  61  */
  62 /* ====================================================================
  63  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
  64  *
  65  * Portions of the attached software ("Contribution") are developed by
  66  * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
  67  *
  68  * The Contribution is licensed pursuant to the OpenSSL open source
  69  * license provided above.
  70  *
  71  * The elliptic curve binary polynomial software is originally written by
  72  * Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems Laboratories.
  73  *
  74  */
  75
  76 #ifndef HEADER_EC_H
  77 # define HEADER_EC_H
  78
  79 # include <openssl/opensslconf.h>
  80
  81 # ifdef OPENSSL_NO_EC
  82 #  error EC is disabled.
  83 # endif
  84
  85 # include <openssl/asn1.h>
  86 # include <openssl/symhacks.h>
  87 # ifdef OPENSSL_USE_DEPRECATED
  88 #  include <openssl/bn.h>
  89 # endif
  90
  91 # ifdef  __cplusplus
  92 extern "C" {
  93 # elif defined(__SUNPRO_C)
  94 #  if __SUNPRO_C >= 0x520
  95 #   pragma error_messages (off,E_ARRAY_OF_INCOMPLETE_NONAME,E_ARRAY_OF_INCOMPLETE)
  96 #  endif
  97 # endif
  98
  99 # ifndef OPENSSL_ECC_MAX_FIELD_BITS
 100 #  define OPENSSL_ECC_MAX_FIELD_BITS 661
 101 # endif
 102
 103 /** Enum for the point conversion form as defined in X9.62 (ECDSA)
 104  *  for the encoding of a elliptic curve point (x,y) */
 105 typedef enum {
 106         /** the point is encoded as z||x, where the octet z specifies
 107          *  which solution of the quadratic equation y is  */
 108     POINT_CONVERSION_COMPRESSED = 2,
 109         /** the point is encoded as z||x||y, where z is the octet 0x04  */
 110     POINT_CONVERSION_UNCOMPRESSED = 4,
 111         /** the point is encoded as z||x||y, where the octet z specifies
 112          *  which solution of the quadratic equation y is  */
 113     POINT_CONVERSION_HYBRID = 6
 114 } point_conversion_form_t;
 115
 116 typedef struct ec_method_st EC_METHOD;
 117
 118 typedef struct ec_group_st
 119     /*-
 120      EC_METHOD *meth;
 121      -- field definition
 122      -- curve coefficients
 123      -- optional generator with associated information (order, cofactor)
 124      -- optional extra data (precomputed table for fast computation of multiples of generator)
 125      -- ASN1 stuff
 126     */
 127     EC_GROUP;
 128
 129 typedef struct ec_point_st EC_POINT;
 130
 131 /********************************************************************/
 132 /*               EC_METHODs for curves over GF(p)                   */
 133 /********************************************************************/
 134
 135 /** Returns the basic GFp ec methods which provides the basis for the
 136  *  optimized methods.
 137  *  \return  EC_METHOD object
 138  */
 139 const EC_METHOD *EC_GFp_simple_method(void);
 140
 141 /** Returns GFp methods using montgomery multiplication.
 142  *  \return  EC_METHOD object
 143  */
 144 const EC_METHOD *EC_GFp_mont_method(void);
 145
 146 /** Returns GFp methods using optimized methods for NIST recommended curves
 147  *  \return  EC_METHOD object
 148  */
 149 const EC_METHOD *EC_GFp_nist_method(void);
 150
 151 # ifndef OPENSSL_NO_EC_NISTP_64_GCC_128
 152 #  ifndef OPENSSL_SYS_WIN32
 153 /** Returns 64-bit optimized methods for nistp224
 154  *  \return  EC_METHOD object
 155  */
 156 const EC_METHOD *EC_GFp_nistp224_method(void);
 157
 158 /** Returns 64-bit optimized methods for nistp256
 159  *  \return  EC_METHOD object
 160  */
 161 const EC_METHOD *EC_GFp_nistp256_method(void);
 162
 163 /** Returns 64-bit optimized methods for nistp521
 164  *  \return  EC_METHOD object
 165  */
 166 const EC_METHOD *EC_GFp_nistp521_method(void);
 167 #  endif
 168 # endif
 169
 170 # ifndef OPENSSL_NO_EC2M
 171 /********************************************************************/
 172 /*           EC_METHOD for curves over GF(2^m)                      */
 173 /********************************************************************/
 174
 175 /** Returns the basic GF2m ec method
 176  *  \return  EC_METHOD object
 177  */
 178 const EC_METHOD *EC_GF2m_simple_method(void);
 179
 180 # endif
 181
 182 /********************************************************************/
 183 /*                   EC_GROUP functions                             */
 184 /********************************************************************/
 185
 186 /** Creates a new EC_GROUP object
 187  *  \param   meth  EC_METHOD to use
 188  *  \return  newly created EC_GROUP object or NULL in case of an error.
 189  */
 190 EC_GROUP *EC_GROUP_new(const EC_METHOD *meth);
 191
 192 /** Frees a EC_GROUP object
 193  *  \param  group  EC_GROUP object to be freed.
 194  */
 195 void EC_GROUP_free(EC_GROUP *group);
 196
 197 /** Clears and frees a EC_GROUP object
 198  *  \param  group  EC_GROUP object to be cleared and freed.
 199  */
 200 void EC_GROUP_clear_free(EC_GROUP *group);
 201
 202 /** Copies EC_GROUP objects. Note: both EC_GROUPs must use the same EC_METHOD.
 203  *  \param  dst  destination EC_GROUP object
 204  *  \param  src  source EC_GROUP object
 205  *  \return 1 on success and 0 if an error occurred.
 206  */
 207 int EC_GROUP_copy(EC_GROUP *dst, const EC_GROUP *src);
 208
 209 /** Creates a new EC_GROUP object and copies the copies the content
 210  *  form src to the newly created EC_KEY object
 211  *  \param  src  source EC_GROUP object
 212  *  \return newly created EC_GROUP object or NULL in case of an error.
 213  */
 214 EC_GROUP *EC_GROUP_dup(const EC_GROUP *src);
 215
 216 /** Returns the EC_METHOD of the EC_GROUP object.
 217  *  \param  group  EC_GROUP object
 218  *  \return EC_METHOD used in this EC_GROUP object.
 219  */
 220 const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group);
 221
 222 /** Returns the field type of the EC_METHOD.
 223  *  \param  meth  EC_METHOD object
 224  *  \return NID of the underlying field type OID.
 225  */
 226 int EC_METHOD_get_field_type(const EC_METHOD *meth);
 227
 228 /** Sets the generator and it's order/cofactor of a EC_GROUP object.
 229  *  \param  group      EC_GROUP object
 230  *  \param  generator  EC_POINT object with the generator.
 231  *  \param  order      the order of the group generated by the generator.
 232  *  \param  cofactor   the index of the sub-group generated by the generator
 233  *                     in the group of all points on the elliptic curve.
 234  *  \return 1 on success and 0 if an error occurred
 235  */
 236 int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator,
 237                            const BIGNUM *order, const BIGNUM *cofactor);
 238
 239 /** Returns the generator of a EC_GROUP object.
 240  *  \param  group  EC_GROUP object
 241  *  \return the currently used generator (possibly NULL).
 242  */
 243 const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group);
 244
 245 /** Returns the montgomery data for order(Generator)
 246  *  \param  group  EC_GROUP object
 247  *  \return the currently used generator (possibly NULL).
 248 */
 249 BN_MONT_CTX *EC_GROUP_get_mont_data(const EC_GROUP *group);
 250
 251 /** Gets the order of a EC_GROUP
 252  *  \param  group  EC_GROUP object
 253  *  \param  order  BIGNUM to which the order is copied
 254  *  \param  ctx    BN_CTX object (optional)
 255  *  \return 1 on success and 0 if an error occurred
 256  */
 257 int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx);
 258
 259 /** Gets the cofactor of a EC_GROUP
 260  *  \param  group     EC_GROUP object
 261  *  \param  cofactor  BIGNUM to which the cofactor is copied
 262  *  \param  ctx       BN_CTX object (optional)
 263  *  \return 1 on success and 0 if an error occurred
 264  */
 265 int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor,
 266                           BN_CTX *ctx);
 267
 268 /** Sets the name of a EC_GROUP object
 269  *  \param  group  EC_GROUP object
 270  *  \param  nid    NID of the curve name OID
 271  */
 272 void EC_GROUP_set_curve_name(EC_GROUP *group, int nid);
 273
 274 /** Returns the curve name of a EC_GROUP object
 275  *  \param  group  EC_GROUP object
 276  *  \return NID of the curve name OID or 0 if not set.
 277  */
 278 int EC_GROUP_get_curve_name(const EC_GROUP *group);
 279
 280 void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag);
 281 int EC_GROUP_get_asn1_flag(const EC_GROUP *group);
 282
 283 void EC_GROUP_set_point_conversion_form(EC_GROUP *group,
 284                                         point_conversion_form_t form);
 285 point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP *);
 286
 287 unsigned char *EC_GROUP_get0_seed(const EC_GROUP *x);
 288 size_t EC_GROUP_get_seed_len(const EC_GROUP *);
 289 size_t EC_GROUP_set_seed(EC_GROUP *, const unsigned char *, size_t len);
 290
 291 /** Sets the parameter of a ec over GFp defined by y^2 = x^3 + a*x + b
 292  *  \param  group  EC_GROUP object
 293  *  \param  p      BIGNUM with the prime number
 294  *  \param  a      BIGNUM with parameter a of the equation
 295  *  \param  b      BIGNUM with parameter b of the equation
 296  *  \param  ctx    BN_CTX object (optional)
 297  *  \return 1 on success and 0 if an error occurred
 298  */
 299 int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a,
 300                            const BIGNUM *b, BN_CTX *ctx);
 301
 302 /** Gets the parameter of the ec over GFp defined by y^2 = x^3 + a*x + b
 303  *  \param  group  EC_GROUP object
 304  *  \param  p      BIGNUM for the prime number
 305  *  \param  a      BIGNUM for parameter a of the equation
 306  *  \param  b      BIGNUM for parameter b of the equation
 307  *  \param  ctx    BN_CTX object (optional)
 308  *  \return 1 on success and 0 if an error occurred
 309  */
 310 int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p, BIGNUM *a,
 311                            BIGNUM *b, BN_CTX *ctx);
 312
 313 # ifndef OPENSSL_NO_EC2M
 314 /** Sets the parameter of a ec over GF2m defined by y^2 + x*y = x^3 + a*x^2 + b
 315  *  \param  group  EC_GROUP object
 316  *  \param  p      BIGNUM with the polynomial defining the underlying field
 317  *  \param  a      BIGNUM with parameter a of the equation
 318  *  \param  b      BIGNUM with parameter b of the equation
 319  *  \param  ctx    BN_CTX object (optional)
 320  *  \return 1 on success and 0 if an error occurred
 321  */
 322 int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a,
 323                             const BIGNUM *b, BN_CTX *ctx);
 324
 325 /** Gets the parameter of the ec over GF2m defined by y^2 + x*y = x^3 + a*x^2 + b
 326  *  \param  group  EC_GROUP object
 327  *  \param  p      BIGNUM for the polynomial defining the underlying field
 328  *  \param  a      BIGNUM for parameter a of the equation
 329  *  \param  b      BIGNUM for parameter b of the equation
 330  *  \param  ctx    BN_CTX object (optional)
 331  *  \return 1 on success and 0 if an error occurred
 332  */
 333 int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p, BIGNUM *a,
 334                             BIGNUM *b, BN_CTX *ctx);
 335 # endif
 336 /** Returns the number of bits needed to represent a field element
 337  *  \param  group  EC_GROUP object
 338  *  \return number of bits needed to represent a field element
 339  */
 340 int EC_GROUP_get_degree(const EC_GROUP *group);
 341
 342 /** Checks whether the parameter in the EC_GROUP define a valid ec group
 343  *  \param  group  EC_GROUP object
 344  *  \param  ctx    BN_CTX object (optional)
 345  *  \return 1 if group is a valid ec group and 0 otherwise
 346  */
 347 int EC_GROUP_check(const EC_GROUP *group, BN_CTX *ctx);
 348
 349 /** Checks whether the discriminant of the elliptic curve is zero or not
 350  *  \param  group  EC_GROUP object
 351  *  \param  ctx    BN_CTX object (optional)
 352  *  \return 1 if the discriminant is not zero and 0 otherwise
 353  */
 354 int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx);
 355
 356 /** Compares two EC_GROUP objects
 357  *  \param  a    first EC_GROUP object
 358  *  \param  b    second EC_GROUP object
 359  *  \param  ctx  BN_CTX object (optional)
 360  *  \return 0 if both groups are equal and 1 otherwise
 361  */
 362 int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx);
 363
 364 /*
 365  * EC_GROUP_new_GF*() calls EC_GROUP_new() and EC_GROUP_set_GF*() after
 366  * choosing an appropriate EC_METHOD
 367  */
 368
 369 /** Creates a new EC_GROUP object with the specified parameters defined
 370  *  over GFp (defined by the equation y^2 = x^3 + a*x + b)
 371  *  \param  p    BIGNUM with the prime number
 372  *  \param  a    BIGNUM with the parameter a of the equation
 373  *  \param  b    BIGNUM with the parameter b of the equation
 374  *  \param  ctx  BN_CTX object (optional)
 375  *  \return newly created EC_GROUP object with the specified parameters
 376  */
 377 EC_GROUP *EC_GROUP_new_curve_GFp(const BIGNUM *p, const BIGNUM *a,
 378                                  const BIGNUM *b, BN_CTX *ctx);
 379 # ifndef OPENSSL_NO_EC2M
 380 /** Creates a new EC_GROUP object with the specified parameters defined
 381  *  over GF2m (defined by the equation y^2 + x*y = x^3 + a*x^2 + b)
 382  *  \param  p    BIGNUM with the polynomial defining the underlying field
 383  *  \param  a    BIGNUM with the parameter a of the equation
 384  *  \param  b    BIGNUM with the parameter b of the equation
 385  *  \param  ctx  BN_CTX object (optional)
 386  *  \return newly created EC_GROUP object with the specified parameters
 387  */
 388 EC_GROUP *EC_GROUP_new_curve_GF2m(const BIGNUM *p, const BIGNUM *a,
 389                                   const BIGNUM *b, BN_CTX *ctx);
 390 # endif
 391 /** Creates a EC_GROUP object with a curve specified by a NID
 392  *  \param  nid  NID of the OID of the curve name
 393  *  \return newly created EC_GROUP object with specified curve or NULL
 394  *          if an error occurred
 395  */
 396 EC_GROUP *EC_GROUP_new_by_curve_name(int nid);
 397
 398 /********************************************************************/
 399 /*               handling of internal curves                        */
 400 /********************************************************************/
 401
 402 typedef struct {
 403     int nid;
 404     const char *comment;
 405 } EC_builtin_curve;
 406
 407 /*
 408  * EC_builtin_curves(EC_builtin_curve *r, size_t size) returns number of all
 409  * available curves or zero if a error occurred. In case r ist not zero
 410  * nitems EC_builtin_curve structures are filled with the data of the first
 411  * nitems internal groups
 412  */
 413 size_t EC_get_builtin_curves(EC_builtin_curve *r, size_t nitems);
 414
 415 const char *EC_curve_nid2nist(int nid);
 416 int EC_curve_nist2nid(const char *name);
 417
 418 /********************************************************************/
 419 /*                    EC_POINT functions                            */
 420 /********************************************************************/
 421
 422 /** Creates a new EC_POINT object for the specified EC_GROUP
 423  *  \param  group  EC_GROUP the underlying EC_GROUP object
 424  *  \return newly created EC_POINT object or NULL if an error occurred
 425  */
 426 EC_POINT *EC_POINT_new(const EC_GROUP *group);
 427
 428 /** Frees a EC_POINT object
 429  *  \param  point  EC_POINT object to be freed
 430  */
 431 void EC_POINT_free(EC_POINT *point);
 432
 433 /** Clears and frees a EC_POINT object
 434  *  \param  point  EC_POINT object to be cleared and freed
 435  */
 436 void EC_POINT_clear_free(EC_POINT *point);
 437
 438 /** Copies EC_POINT object
 439  *  \param  dst  destination EC_POINT object
 440  *  \param  src  source EC_POINT object
 441  *  \return 1 on success and 0 if an error occurred
 442  */
 443 int EC_POINT_copy(EC_POINT *dst, const EC_POINT *src);
 444
 445 /** Creates a new EC_POINT object and copies the content of the supplied
 446  *  EC_POINT
 447  *  \param  src    source EC_POINT object
 448  *  \param  group  underlying the EC_GROUP object
 449  *  \return newly created EC_POINT object or NULL if an error occurred
 450  */
 451 EC_POINT *EC_POINT_dup(const EC_POINT *src, const EC_GROUP *group);
 452
 453 /** Returns the EC_METHOD used in EC_POINT object
 454  *  \param  point  EC_POINT object
 455  *  \return the EC_METHOD used
 456  */
 457 const EC_METHOD *EC_POINT_method_of(const EC_POINT *point);
 458
 459 /** Sets a point to infinity (neutral element)
 460  *  \param  group  underlying EC_GROUP object
 461  *  \param  point  EC_POINT to set to infinity
 462  *  \return 1 on success and 0 if an error occurred
 463  */
 464 int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point);
 465
 466 /** Sets the jacobian projective coordinates of a EC_POINT over GFp
 467  *  \param  group  underlying EC_GROUP object
 468  *  \param  p      EC_POINT object
 469  *  \param  x      BIGNUM with the x-coordinate
 470  *  \param  y      BIGNUM with the y-coordinate
 471  *  \param  z      BIGNUM with the z-coordinate
 472  *  \param  ctx    BN_CTX object (optional)
 473  *  \return 1 on success and 0 if an error occurred
 474  */
 475 int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group,
 476                                              EC_POINT *p, const BIGNUM *x,
 477                                              const BIGNUM *y, const BIGNUM *z,
 478                                              BN_CTX *ctx);
 479
 480 /** Gets the jacobian projective coordinates of a EC_POINT over GFp
 481  *  \param  group  underlying EC_GROUP object
 482  *  \param  p      EC_POINT object
 483  *  \param  x      BIGNUM for the x-coordinate
 484  *  \param  y      BIGNUM for the y-coordinate
 485  *  \param  z      BIGNUM for the z-coordinate
 486  *  \param  ctx    BN_CTX object (optional)
 487  *  \return 1 on success and 0 if an error occurred
 488  */
 489 int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group,
 490                                              const EC_POINT *p, BIGNUM *x,
 491                                              BIGNUM *y, BIGNUM *z,
 492                                              BN_CTX *ctx);
 493
 494 /** Sets the affine coordinates of a EC_POINT over GFp
 495  *  \param  group  underlying EC_GROUP object
 496  *  \param  p      EC_POINT object
 497  *  \param  x      BIGNUM with the x-coordinate
 498  *  \param  y      BIGNUM with the y-coordinate
 499  *  \param  ctx    BN_CTX object (optional)
 500  *  \return 1 on success and 0 if an error occurred
 501  */
 502 int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, EC_POINT *p,
 503                                         const BIGNUM *x, const BIGNUM *y,
 504                                         BN_CTX *ctx);
 505
 506 /** Gets the affine coordinates of a EC_POINT over GFp
 507  *  \param  group  underlying EC_GROUP object
 508  *  \param  p      EC_POINT object
 509  *  \param  x      BIGNUM for the x-coordinate
 510  *  \param  y      BIGNUM for the y-coordinate
 511  *  \param  ctx    BN_CTX object (optional)
 512  *  \return 1 on success and 0 if an error occurred
 513  */
 514 int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group,
 515                                         const EC_POINT *p, BIGNUM *x,
 516                                         BIGNUM *y, BN_CTX *ctx);
 517
 518 /** Sets the x9.62 compressed coordinates of a EC_POINT over GFp
 519  *  \param  group  underlying EC_GROUP object
 520  *  \param  p      EC_POINT object
 521  *  \param  x      BIGNUM with x-coordinate
 522  *  \param  y_bit  integer with the y-Bit (either 0 or 1)
 523  *  \param  ctx    BN_CTX object (optional)
 524  *  \return 1 on success and 0 if an error occurred
 525  */
 526 int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group,
 527                                             EC_POINT *p, const BIGNUM *x,
 528                                             int y_bit, BN_CTX *ctx);
 529 # ifndef OPENSSL_NO_EC2M
 530 /** Sets the affine coordinates of a EC_POINT over GF2m
 531  *  \param  group  underlying EC_GROUP object
 532  *  \param  p      EC_POINT object
 533  *  \param  x      BIGNUM with the x-coordinate
 534  *  \param  y      BIGNUM with the y-coordinate
 535  *  \param  ctx    BN_CTX object (optional)
 536  *  \return 1 on success and 0 if an error occurred
 537  */
 538 int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group, EC_POINT *p,
 539                                          const BIGNUM *x, const BIGNUM *y,
 540                                          BN_CTX *ctx);
 541
 542 /** Gets the affine coordinates of a EC_POINT over GF2m
 543  *  \param  group  underlying EC_GROUP object
 544  *  \param  p      EC_POINT object
 545  *  \param  x      BIGNUM for the x-coordinate
 546  *  \param  y      BIGNUM for the y-coordinate
 547  *  \param  ctx    BN_CTX object (optional)
 548  *  \return 1 on success and 0 if an error occurred
 549  */
 550 int EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *group,
 551                                          const EC_POINT *p, BIGNUM *x,
 552                                          BIGNUM *y, BN_CTX *ctx);
 553
 554 /** Sets the x9.62 compressed coordinates of a EC_POINT over GF2m
 555  *  \param  group  underlying EC_GROUP object
 556  *  \param  p      EC_POINT object
 557  *  \param  x      BIGNUM with x-coordinate
 558  *  \param  y_bit  integer with the y-Bit (either 0 or 1)
 559  *  \param  ctx    BN_CTX object (optional)
 560  *  \return 1 on success and 0 if an error occurred
 561  */
 562 int EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *group,
 563                                              EC_POINT *p, const BIGNUM *x,
 564                                              int y_bit, BN_CTX *ctx);
 565 # endif
 566 /** Encodes a EC_POINT object to a octet string
 567  *  \param  group  underlying EC_GROUP object
 568  *  \param  p      EC_POINT object
 569  *  \param  form   point conversion form
 570  *  \param  buf    memory buffer for the result. If NULL the function returns
 571  *                 required buffer size.
 572  *  \param  len    length of the memory buffer
 573  *  \param  ctx    BN_CTX object (optional)
 574  *  \return the length of the encoded octet string or 0 if an error occurred
 575  */
 576 size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *p,
 577                           point_conversion_form_t form,
 578                           unsigned char *buf, size_t len, BN_CTX *ctx);
 579
 580 /** Decodes a EC_POINT from a octet string
 581  *  \param  group  underlying EC_GROUP object
 582  *  \param  p      EC_POINT object
 583  *  \param  buf    memory buffer with the encoded ec point
 584  *  \param  len    length of the encoded ec point
 585  *  \param  ctx    BN_CTX object (optional)
 586  *  \return 1 on success and 0 if an error occurred
 587  */
 588 int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *p,
 589                        const unsigned char *buf, size_t len, BN_CTX *ctx);
 590
 591 /* other interfaces to point2oct/oct2point: */
 592 BIGNUM *EC_POINT_point2bn(const EC_GROUP *, const EC_POINT *,
 593                           point_conversion_form_t form, BIGNUM *, BN_CTX *);
 594 EC_POINT *EC_POINT_bn2point(const EC_GROUP *, const BIGNUM *,
 595                             EC_POINT *, BN_CTX *);
 596 char *EC_POINT_point2hex(const EC_GROUP *, const EC_POINT *,
 597                          point_conversion_form_t form, BN_CTX *);
 598 EC_POINT *EC_POINT_hex2point(const EC_GROUP *, const char *,
 599                              EC_POINT *, BN_CTX *);
 600
 601 /********************************************************************/
 602 /*         functions for doing EC_POINT arithmetic                  */
 603 /********************************************************************/
 604
 605 /** Computes the sum of two EC_POINT
 606  *  \param  group  underlying EC_GROUP object
 607  *  \param  r      EC_POINT object for the result (r = a + b)
 608  *  \param  a      EC_POINT object with the first summand
 609  *  \param  b      EC_POINT object with the second summand
 610  *  \param  ctx    BN_CTX object (optional)
 611  *  \return 1 on success and 0 if an error occurred
 612  */
 613 int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a,
 614                  const EC_POINT *b, BN_CTX *ctx);
 615
 616 /** Computes the double of a EC_POINT
 617  *  \param  group  underlying EC_GROUP object
 618  *  \param  r      EC_POINT object for the result (r = 2 * a)
 619  *  \param  a      EC_POINT object
 620  *  \param  ctx    BN_CTX object (optional)
 621  *  \return 1 on success and 0 if an error occurred
 622  */
 623 int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a,
 624                  BN_CTX *ctx);
 625
 626 /** Computes the inverse of a EC_POINT
 627  *  \param  group  underlying EC_GROUP object
 628  *  \param  a      EC_POINT object to be inverted (it's used for the result as well)
 629  *  \param  ctx    BN_CTX object (optional)
 630  *  \return 1 on success and 0 if an error occurred
 631  */
 632 int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx);
 633
 634 /** Checks whether the point is the neutral element of the group
 635  *  \param  group  the underlying EC_GROUP object
 636  *  \param  p      EC_POINT object
 637  *  \return 1 if the point is the neutral element and 0 otherwise
 638  */
 639 int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *p);
 640
 641 /** Checks whether the point is on the curve
 642  *  \param  group  underlying EC_GROUP object
 643  *  \param  point  EC_POINT object to check
 644  *  \param  ctx    BN_CTX object (optional)
 645  *  \return 1 if point if on the curve and 0 otherwise
 646  */
 647 int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point,
 648                          BN_CTX *ctx);
 649
 650 /** Compares two EC_POINTs
 651  *  \param  group  underlying EC_GROUP object
 652  *  \param  a      first EC_POINT object
 653  *  \param  b      second EC_POINT object
 654  *  \param  ctx    BN_CTX object (optional)
 655  *  \return 0 if both points are equal and a value != 0 otherwise
 656  */
 657 int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b,
 658                  BN_CTX *ctx);
 659
 660 int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx);
 661 int EC_POINTs_make_affine(const EC_GROUP *group, size_t num,
 662                           EC_POINT *points[], BN_CTX *ctx);
 663
 664 /** Computes r = generator * n sum_{i=0}^{num-1} p[i] * m[i]
 665  *  \param  group  underlying EC_GROUP object
 666  *  \param  r      EC_POINT object for the result
 667  *  \param  n      BIGNUM with the multiplier for the group generator (optional)
 668  *  \param  num    number futher summands
 669  *  \param  p      array of size num of EC_POINT objects
 670  *  \param  m      array of size num of BIGNUM objects
 671  *  \param  ctx    BN_CTX object (optional)
 672  *  \return 1 on success and 0 if an error occurred
 673  */
 674 int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *n,
 675                   size_t num, const EC_POINT *p[], const BIGNUM *m[],
 676                   BN_CTX *ctx);
 677
 678 /** Computes r = generator * n + q * m
 679  *  \param  group  underlying EC_GROUP object
 680  *  \param  r      EC_POINT object for the result
 681  *  \param  n      BIGNUM with the multiplier for the group generator (optional)
 682  *  \param  q      EC_POINT object with the first factor of the second summand
 683  *  \param  m      BIGNUM with the second factor of the second summand
 684  *  \param  ctx    BN_CTX object (optional)
 685  *  \return 1 on success and 0 if an error occurred
 686  */
 687 int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *n,
 688                  const EC_POINT *q, const BIGNUM *m, BN_CTX *ctx);
 689
 690 /** Stores multiples of generator for faster point multiplication
 691  *  \param  group  EC_GROUP object
 692  *  \param  ctx    BN_CTX object (optional)
 693  *  \return 1 on success and 0 if an error occurred
 694  */
 695 int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx);
 696
 697 /** Reports whether a precomputation has been done
 698  *  \param  group  EC_GROUP object
 699  *  \return 1 if a pre-computation has been done and 0 otherwise
 700  */
 701 int EC_GROUP_have_precompute_mult(const EC_GROUP *group);
 702
 703 /********************************************************************/
 704 /*                       ASN1 stuff                                 */
 705 /********************************************************************/
 706
 707 /*
 708  * EC_GROUP_get_basis_type() returns the NID of the basis type used to
 709  * represent the field elements
 710  */
 711 int EC_GROUP_get_basis_type(const EC_GROUP *);
 712 # ifndef OPENSSL_NO_EC2M
 713 int EC_GROUP_get_trinomial_basis(const EC_GROUP *, unsigned int *k);
 714 int EC_GROUP_get_pentanomial_basis(const EC_GROUP *, unsigned int *k1,
 715                                    unsigned int *k2, unsigned int *k3);
 716 # endif
 717
 718 # define OPENSSL_EC_EXPLICIT_CURVE  0x000
 719 # define OPENSSL_EC_NAMED_CURVE     0x001
 720
 721 typedef struct ecpk_parameters_st ECPKPARAMETERS;
 722
 723 EC_GROUP *d2i_ECPKParameters(EC_GROUP **, const unsigned char **in, long len);
 724 int i2d_ECPKParameters(const EC_GROUP *, unsigned char **out);
 725
 726 # define d2i_ECPKParameters_bio(bp,x) ASN1_d2i_bio_of(EC_GROUP,NULL,d2i_ECPKParameters,bp,x)
 727 # define i2d_ECPKParameters_bio(bp,x) ASN1_i2d_bio_of_const(EC_GROUP,i2d_ECPKParameters,bp,x)
 728 # define d2i_ECPKParameters_fp(fp,x) (EC_GROUP *)ASN1_d2i_fp(NULL, \
 729                 (char *(*)())d2i_ECPKParameters,(fp),(unsigned char **)(x))
 730 # define i2d_ECPKParameters_fp(fp,x) ASN1_i2d_fp(i2d_ECPKParameters,(fp), \
 731                 (unsigned char *)(x))
 732
 733 int ECPKParameters_print(BIO *bp, const EC_GROUP *x, int off);
 734 # ifndef OPENSSL_NO_STDIO
 735 int ECPKParameters_print_fp(FILE *fp, const EC_GROUP *x, int off);
 736 # endif
 737
 738 /********************************************************************/
 739 /*                      EC_KEY functions                            */
 740 /********************************************************************/
 741
 742 typedef struct ec_key_st EC_KEY;
 743 typedef struct ec_key_method_st EC_KEY_METHOD;
 744
 745 /* some values for the encoding_flag */
 746 # define EC_PKEY_NO_PARAMETERS   0x001
 747 # define EC_PKEY_NO_PUBKEY       0x002
 748
 749 /* some values for the flags field */
 750 # define EC_FLAG_NON_FIPS_ALLOW  0x1
 751 # define EC_FLAG_FIPS_CHECKED    0x2
 752
 753 /** Creates a new EC_KEY object.
 754  *  \return EC_KEY object or NULL if an error occurred.
 755  */
 756 EC_KEY *EC_KEY_new(void);
 757
 758 int EC_KEY_get_flags(const EC_KEY *key);
 759
 760 void EC_KEY_set_flags(EC_KEY *key, int flags);
 761
 762 void EC_KEY_clear_flags(EC_KEY *key, int flags);
 763
 764 /** Creates a new EC_KEY object using a named curve as underlying
 765  *  EC_GROUP object.
 766  *  \param  nid  NID of the named curve.
 767  *  \return EC_KEY object or NULL if an error occurred.
 768  */
 769 EC_KEY *EC_KEY_new_by_curve_name(int nid);
 770
 771 /** Frees a EC_KEY object.
 772  *  \param  key  EC_KEY object to be freed.
 773  */
 774 void EC_KEY_free(EC_KEY *key);
 775
 776 /** Copies a EC_KEY object.
 777  *  \param  dst  destination EC_KEY object
 778  *  \param  src  src EC_KEY object
 779  *  \return dst or NULL if an error occurred.
 780  */
 781 EC_KEY *EC_KEY_copy(EC_KEY *dst, const EC_KEY *src);
 782
 783 /** Creates a new EC_KEY object and copies the content from src to it.
 784  *  \param  src  the source EC_KEY object
 785  *  \return newly created EC_KEY object or NULL if an error occurred.
 786  */
 787 EC_KEY *EC_KEY_dup(const EC_KEY *src);
 788
 789 /** Increases the internal reference count of a EC_KEY object.
 790  *  \param  key  EC_KEY object
 791  *  \return 1 on success and 0 if an error occurred.
 792  */
 793 int EC_KEY_up_ref(EC_KEY *key);
 794
 795 /** Returns the EC_GROUP object of a EC_KEY object
 796  *  \param  key  EC_KEY object
 797  *  \return the EC_GROUP object (possibly NULL).
 798  */
 799 const EC_GROUP *EC_KEY_get0_group(const EC_KEY *key);
 800
 801 /** Sets the EC_GROUP of a EC_KEY object.
 802  *  \param  key    EC_KEY object
 803  *  \param  group  EC_GROUP to use in the EC_KEY object (note: the EC_KEY
 804  *                 object will use an own copy of the EC_GROUP).
 805  *  \return 1 on success and 0 if an error occurred.
 806  */
 807 int EC_KEY_set_group(EC_KEY *key, const EC_GROUP *group);
 808
 809 /** Returns the private key of a EC_KEY object.
 810  *  \param  key  EC_KEY object
 811  *  \return a BIGNUM with the private key (possibly NULL).
 812  */
 813 const BIGNUM *EC_KEY_get0_private_key(const EC_KEY *key);
 814
 815 /** Sets the private key of a EC_KEY object.
 816  *  \param  key  EC_KEY object
 817  *  \param  prv  BIGNUM with the private key (note: the EC_KEY object
 818  *               will use an own copy of the BIGNUM).
 819  *  \return 1 on success and 0 if an error occurred.
 820  */
 821 int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *prv);
 822
 823 /** Returns the public key of a EC_KEY object.
 824  *  \param  key  the EC_KEY object
 825  *  \return a EC_POINT object with the public key (possibly NULL)
 826  */
 827 const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *key);
 828
 829 /** Sets the public key of a EC_KEY object.
 830  *  \param  key  EC_KEY object
 831  *  \param  pub  EC_POINT object with the public key (note: the EC_KEY object
 832  *               will use an own copy of the EC_POINT object).
 833  *  \return 1 on success and 0 if an error occurred.
 834  */
 835 int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub);
 836
 837 unsigned EC_KEY_get_enc_flags(const EC_KEY *key);
 838 void EC_KEY_set_enc_flags(EC_KEY *eckey, unsigned int flags);
 839 point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key);
 840 void EC_KEY_set_conv_form(EC_KEY *eckey, point_conversion_form_t cform);
 841 /* functions to set/get method specific data  */
 842 void *EC_KEY_get_key_method_data(EC_KEY *key,
 843                                  void *(*dup_func) (void *),
 844                                  void (*free_func) (void *),
 845                                  void (*clear_free_func) (void *));
 846 /** Sets the key method data of an EC_KEY object, if none has yet been set.
 847  *  \param  key              EC_KEY object
 848  *  \param  data             opaque data to install.
 849  *  \param  dup_func         a function that duplicates |data|.
 850  *  \param  free_func        a function that frees |data|.
 851  *  \param  clear_free_func  a function that wipes and frees |data|.
 852  *  \return the previously set data pointer, or NULL if |data| was inserted.
 853  */
 854 void *EC_KEY_insert_key_method_data(EC_KEY *key, void *data,
 855                                     void *(*dup_func) (void *),
 856                                     void (*free_func) (void *),
 857                                     void (*clear_free_func) (void *));
 858 /* wrapper functions for the underlying EC_GROUP object */
 859 void EC_KEY_set_asn1_flag(EC_KEY *eckey, int asn1_flag);
 860
 861 /** Creates a table of pre-computed multiples of the generator to
 862  *  accelerate further EC_KEY operations.
 863  *  \param  key  EC_KEY object
 864  *  \param  ctx  BN_CTX object (optional)
 865  *  \return 1 on success and 0 if an error occurred.
 866  */
 867 int EC_KEY_precompute_mult(EC_KEY *key, BN_CTX *ctx);
 868
 869 /** Creates a new ec private (and optional a new public) key.
 870  *  \param  key  EC_KEY object
 871  *  \return 1 on success and 0 if an error occurred.
 872  */
 873 int EC_KEY_generate_key(EC_KEY *key);
 874
 875 /** Verifies that a private and/or public key is valid.
 876  *  \param  key  the EC_KEY object
 877  *  \return 1 on success and 0 otherwise.
 878  */
 879 int EC_KEY_check_key(const EC_KEY *key);
 880
 881 /** Sets a public key from affine coordindates performing
 882  *  necessary NIST PKV tests.
 883  *  \param  key  the EC_KEY object
 884  *  \param  x    public key x coordinate
 885  *  \param  y    public key y coordinate
 886  *  \return 1 on success and 0 otherwise.
 887  */
 888 int EC_KEY_set_public_key_affine_coordinates(EC_KEY *key, BIGNUM *x,
 889                                              BIGNUM *y);
 890
 891 /********************************************************************/
 892 /*        de- and encoding functions for SEC1 ECPrivateKey          */
 893 /********************************************************************/
 894
 895 /** Decodes a private key from a memory buffer.
 896  *  \param  key  a pointer to a EC_KEY object which should be used (or NULL)
 897  *  \param  in   pointer to memory with the DER encoded private key
 898  *  \param  len  length of the DER encoded private key
 899  *  \return the decoded private key or NULL if an error occurred.
 900  */
 901 EC_KEY *d2i_ECPrivateKey(EC_KEY **key, const unsigned char **in, long len);
 902
 903 /** Encodes a private key object and stores the result in a buffer.
 904  *  \param  key  the EC_KEY object to encode
 905  *  \param  out  the buffer for the result (if NULL the function returns number
 906  *               of bytes needed).
 907  *  \return 1 on success and 0 if an error occurred.
 908  */
 909 int i2d_ECPrivateKey(EC_KEY *key, unsigned char **out);
 910
 911 /********************************************************************/
 912 /*        de- and encoding functions for EC parameters              */
 913 /********************************************************************/
 914
 915 /** Decodes ec parameter from a memory buffer.
 916  *  \param  key  a pointer to a EC_KEY object which should be used (or NULL)
 917  *  \param  in   pointer to memory with the DER encoded ec parameters
 918  *  \param  len  length of the DER encoded ec parameters
 919  *  \return a EC_KEY object with the decoded parameters or NULL if an error
 920  *          occurred.
 921  */
 922 EC_KEY *d2i_ECParameters(EC_KEY **key, const unsigned char **in, long len);
 923
 924 /** Encodes ec parameter and stores the result in a buffer.
 925  *  \param  key  the EC_KEY object with ec parameters to encode
 926  *  \param  out  the buffer for the result (if NULL the function returns number
 927  *               of bytes needed).
 928  *  \return 1 on success and 0 if an error occurred.
 929  */
 930 int i2d_ECParameters(EC_KEY *key, unsigned char **out);
 931
 932 /********************************************************************/
 933 /*         de- and encoding functions for EC public key             */
 934 /*         (octet string, not DER -- hence 'o2i' and 'i2o')         */
 935 /********************************************************************/
 936
 937 /** Decodes a ec public key from a octet string.
 938  *  \param  key  a pointer to a EC_KEY object which should be used
 939  *  \param  in   memory buffer with the encoded public key
 940  *  \param  len  length of the encoded public key
 941  *  \return EC_KEY object with decoded public key or NULL if an error
 942  *          occurred.
 943  */
 944 EC_KEY *o2i_ECPublicKey(EC_KEY **key, const unsigned char **in, long len);
 945
 946 /** Encodes a ec public key in an octet string.
 947  *  \param  key  the EC_KEY object with the public key
 948  *  \param  out  the buffer for the result (if NULL the function returns number
 949  *               of bytes needed).
 950  *  \return 1 on success and 0 if an error occurred
 951  */
 952 int i2o_ECPublicKey(EC_KEY *key, unsigned char **out);
 953
 954 /** Prints out the ec parameters on human readable form.
 955  *  \param  bp   BIO object to which the information is printed
 956  *  \param  key  EC_KEY object
 957  *  \return 1 on success and 0 if an error occurred
 958  */
 959 int ECParameters_print(BIO *bp, const EC_KEY *key);
 960
 961 /** Prints out the contents of a EC_KEY object
 962  *  \param  bp   BIO object to which the information is printed
 963  *  \param  key  EC_KEY object
 964  *  \param  off  line offset
 965  *  \return 1 on success and 0 if an error occurred
 966  */
 967 int EC_KEY_print(BIO *bp, const EC_KEY *key, int off);
 968
 969 # ifndef OPENSSL_NO_STDIO
 970 /** Prints out the ec parameters on human readable form.
 971  *  \param  fp   file descriptor to which the information is printed
 972  *  \param  key  EC_KEY object
 973  *  \return 1 on success and 0 if an error occurred
 974  */
 975 int ECParameters_print_fp(FILE *fp, const EC_KEY *key);
 976
 977 /** Prints out the contents of a EC_KEY object
 978  *  \param  fp   file descriptor to which the information is printed
 979  *  \param  key  EC_KEY object
 980  *  \param  off  line offset
 981  *  \return 1 on success and 0 if an error occurred
 982  */
 983 int EC_KEY_print_fp(FILE *fp, const EC_KEY *key, int off);
 984
 985 # endif
 986
 987 const EC_KEY_METHOD *EC_KEY_OpenSSL(void);
 988 const EC_KEY_METHOD *EC_KEY_get_default_method(void);
 989 void EC_KEY_set_default_method(const EC_KEY_METHOD *meth);
 990 EC_KEY *EC_KEY_new_method(ENGINE *engine);
 991
 992 # define ECParameters_dup(x) ASN1_dup_of(EC_KEY,i2d_ECParameters,d2i_ECParameters,x)
 993
 994 # ifndef __cplusplus
 995 #  if defined(__SUNPRO_C)
 996 #   if __SUNPRO_C >= 0x520
 997 #    pragma error_messages (default,E_ARRAY_OF_INCOMPLETE_NONAME,E_ARRAY_OF_INCOMPLETE)
 998 #   endif
 999 #  endif
1000 # endif
1001
1002 # define EVP_PKEY_CTX_set_ec_paramgen_curve_nid(ctx, nid) \
1003         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1004                                 EVP_PKEY_OP_PARAMGEN|EVP_PKEY_OP_KEYGEN, \
1005                                 EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID, nid, NULL)
1006
1007 # define EVP_PKEY_CTX_set_ec_param_enc(ctx, flag) \
1008         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1009                                 EVP_PKEY_OP_PARAMGEN|EVP_PKEY_OP_KEYGEN, \
1010                                 EVP_PKEY_CTRL_EC_PARAM_ENC, flag, NULL)
1011
1012 # define EVP_PKEY_CTX_set_ecdh_cofactor_mode(ctx, flag) \
1013         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1014                                 EVP_PKEY_OP_DERIVE, \
1015                                 EVP_PKEY_CTRL_EC_ECDH_COFACTOR, flag, NULL)
1016
1017 # define EVP_PKEY_CTX_get_ecdh_cofactor_mode(ctx) \
1018         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1019                                 EVP_PKEY_OP_DERIVE, \
1020                                 EVP_PKEY_CTRL_EC_ECDH_COFACTOR, -2, NULL)
1021
1022 # define EVP_PKEY_CTX_set_ecdh_kdf_type(ctx, kdf) \
1023         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1024                                 EVP_PKEY_OP_DERIVE, \
1025                                 EVP_PKEY_CTRL_EC_KDF_TYPE, kdf, NULL)
1026
1027 # define EVP_PKEY_CTX_get_ecdh_kdf_type(ctx) \
1028         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1029                                 EVP_PKEY_OP_DERIVE, \
1030                                 EVP_PKEY_CTRL_EC_KDF_TYPE, -2, NULL)
1031
1032 # define EVP_PKEY_CTX_set_ecdh_kdf_md(ctx, md) \
1033         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1034                                 EVP_PKEY_OP_DERIVE, \
1035                                 EVP_PKEY_CTRL_EC_KDF_MD, 0, (void *)md)
1036
1037 # define EVP_PKEY_CTX_get_ecdh_kdf_md(ctx, pmd) \
1038         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1039                                 EVP_PKEY_OP_DERIVE, \
1040                                 EVP_PKEY_CTRL_GET_EC_KDF_MD, 0, (void *)pmd)
1041
1042 # define EVP_PKEY_CTX_set_ecdh_kdf_outlen(ctx, len) \
1043         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1044                                 EVP_PKEY_OP_DERIVE, \
1045                                 EVP_PKEY_CTRL_EC_KDF_OUTLEN, len, NULL)
1046
1047 # define EVP_PKEY_CTX_get_ecdh_kdf_outlen(ctx, plen) \
1048         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1049                                 EVP_PKEY_OP_DERIVE, \
1050                         EVP_PKEY_CTRL_GET_EC_KDF_OUTLEN, 0, (void *)plen)
1051
1052 # define EVP_PKEY_CTX_set0_ecdh_kdf_ukm(ctx, p, plen) \
1053         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1054                                 EVP_PKEY_OP_DERIVE, \
1055                                 EVP_PKEY_CTRL_EC_KDF_UKM, plen, (void *)p)
1056
1057 # define EVP_PKEY_CTX_get0_ecdh_kdf_ukm(ctx, p) \
1058         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, \
1059                                 EVP_PKEY_OP_DERIVE, \
1060                                 EVP_PKEY_CTRL_GET_EC_KDF_UKM, 0, (void *)p)
1061
1062 # define EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID             (EVP_PKEY_ALG_CTRL + 1)
1063 # define EVP_PKEY_CTRL_EC_PARAM_ENC                      (EVP_PKEY_ALG_CTRL + 2)
1064 # define EVP_PKEY_CTRL_EC_ECDH_COFACTOR                  (EVP_PKEY_ALG_CTRL + 3)
1065 # define EVP_PKEY_CTRL_EC_KDF_TYPE                       (EVP_PKEY_ALG_CTRL + 4)
1066 # define EVP_PKEY_CTRL_EC_KDF_MD                         (EVP_PKEY_ALG_CTRL + 5)
1067 # define EVP_PKEY_CTRL_GET_EC_KDF_MD                     (EVP_PKEY_ALG_CTRL + 6)
1068 # define EVP_PKEY_CTRL_EC_KDF_OUTLEN                     (EVP_PKEY_ALG_CTRL + 7)
1069 # define EVP_PKEY_CTRL_GET_EC_KDF_OUTLEN                 (EVP_PKEY_ALG_CTRL + 8)
1070 # define EVP_PKEY_CTRL_EC_KDF_UKM                        (EVP_PKEY_ALG_CTRL + 9)
1071 # define EVP_PKEY_CTRL_GET_EC_KDF_UKM                    (EVP_PKEY_ALG_CTRL + 10)
1072 /* KDF types */
1073 # define EVP_PKEY_ECDH_KDF_NONE                          1
1074 # define EVP_PKEY_ECDH_KDF_X9_62                         2
1075
1076 /* BEGIN ERROR CODES */
1077 /*
1078  * The following lines are auto generated by the script mkerr.pl. Any changes
1079  * made after this point may be overwritten when the script is next run.
1080  */
1081 void ERR_load_EC_strings(void);
1082
1083 /* Error codes for the EC functions. */
1084
1085 /* Function codes. */
1086 # define EC_F_BN_TO_FELEM                                 224
1087 # define EC_F_COMPUTE_WNAF                                143
1088 # define EC_F_D2I_ECPARAMETERS                            144
1089 # define EC_F_D2I_ECPKPARAMETERS                          145
1090 # define EC_F_D2I_ECPRIVATEKEY                            146
1091 # define EC_F_DO_EC_KEY_PRINT                             221
1092 # define EC_F_ECDH_CMS_DECRYPT                            238
1093 # define EC_F_ECDH_CMS_SET_SHARED_INFO                    239
1094 # define EC_F_ECKEY_PARAM2TYPE                            223
1095 # define EC_F_ECKEY_PARAM_DECODE                          212
1096 # define EC_F_ECKEY_PRIV_DECODE                           213
1097 # define EC_F_ECKEY_PRIV_ENCODE                           214
1098 # define EC_F_ECKEY_PUB_DECODE                            215
1099 # define EC_F_ECKEY_PUB_ENCODE                            216
1100 # define EC_F_ECKEY_TYPE2PARAM                            220
1101 # define EC_F_ECPARAMETERS_PRINT                          147
1102 # define EC_F_ECPARAMETERS_PRINT_FP                       148
1103 # define EC_F_ECPKPARAMETERS_PRINT                        149
1104 # define EC_F_ECPKPARAMETERS_PRINT_FP                     150
1105 # define EC_F_ECP_NIST_MOD_192                            203
1106 # define EC_F_ECP_NIST_MOD_224                            204
1107 # define EC_F_ECP_NIST_MOD_256                            205
1108 # define EC_F_ECP_NIST_MOD_521                            206
1109 # define EC_F_EC_ASN1_GROUP2CURVE                         153
1110 # define EC_F_EC_ASN1_GROUP2FIELDID                       154
1111 # define EC_F_EC_ASN1_GROUP2PARAMETERS                    155
1112 # define EC_F_EC_ASN1_GROUP2PKPARAMETERS                  156
1113 # define EC_F_EC_ASN1_PARAMETERS2GROUP                    157
1114 # define EC_F_EC_ASN1_PKPARAMETERS2GROUP                  158
1115 # define EC_F_EC_EX_DATA_SET_DATA                         211
1116 # define EC_F_EC_GF2M_MONTGOMERY_POINT_MULTIPLY           208
1117 # define EC_F_EC_GF2M_SIMPLE_GROUP_CHECK_DISCRIMINANT     159
1118 # define EC_F_EC_GF2M_SIMPLE_GROUP_SET_CURVE              195
1119 # define EC_F_EC_GF2M_SIMPLE_OCT2POINT                    160
1120 # define EC_F_EC_GF2M_SIMPLE_POINT2OCT                    161
1121 # define EC_F_EC_GF2M_SIMPLE_POINT_GET_AFFINE_COORDINATES 162
1122 # define EC_F_EC_GF2M_SIMPLE_POINT_SET_AFFINE_COORDINATES 163
1123 # define EC_F_EC_GF2M_SIMPLE_SET_COMPRESSED_COORDINATES   164
1124 # define EC_F_EC_GFP_MONT_FIELD_DECODE                    133
1125 # define EC_F_EC_GFP_MONT_FIELD_ENCODE                    134
1126 # define EC_F_EC_GFP_MONT_FIELD_MUL                       131
1127 # define EC_F_EC_GFP_MONT_FIELD_SET_TO_ONE                209
1128 # define EC_F_EC_GFP_MONT_FIELD_SQR                       132
1129 # define EC_F_EC_GFP_MONT_GROUP_SET_CURVE                 189
1130 # define EC_F_EC_GFP_MONT_GROUP_SET_CURVE_GFP             135
1131 # define EC_F_EC_GFP_NISTP224_GROUP_SET_CURVE             225
1132 # define EC_F_EC_GFP_NISTP224_POINTS_MUL                  228
1133 # define EC_F_EC_GFP_NISTP224_POINT_GET_AFFINE_COORDINATES 226
1134 # define EC_F_EC_GFP_NISTP256_GROUP_SET_CURVE             230
1135 # define EC_F_EC_GFP_NISTP256_POINTS_MUL                  231
1136 # define EC_F_EC_GFP_NISTP256_POINT_GET_AFFINE_COORDINATES 232
1137 # define EC_F_EC_GFP_NISTP521_GROUP_SET_CURVE             233
1138 # define EC_F_EC_GFP_NISTP521_POINTS_MUL                  234
1139 # define EC_F_EC_GFP_NISTP521_POINT_GET_AFFINE_COORDINATES 235
1140 # define EC_F_EC_GFP_NIST_FIELD_MUL                       200
1141 # define EC_F_EC_GFP_NIST_FIELD_SQR                       201
1142 # define EC_F_EC_GFP_NIST_GROUP_SET_CURVE                 202
1143 # define EC_F_EC_GFP_SIMPLE_GROUP_CHECK_DISCRIMINANT      165
1144 # define EC_F_EC_GFP_SIMPLE_GROUP_SET_CURVE               166
1145 # define EC_F_EC_GFP_SIMPLE_GROUP_SET_CURVE_GFP           100
1146 # define EC_F_EC_GFP_SIMPLE_GROUP_SET_GENERATOR           101
1147 # define EC_F_EC_GFP_SIMPLE_MAKE_AFFINE                   102
1148 # define EC_F_EC_GFP_SIMPLE_OCT2POINT                     103
1149 # define EC_F_EC_GFP_SIMPLE_POINT2OCT                     104
1150 # define EC_F_EC_GFP_SIMPLE_POINTS_MAKE_AFFINE            137
1151 # define EC_F_EC_GFP_SIMPLE_POINT_GET_AFFINE_COORDINATES  167
1152 # define EC_F_EC_GFP_SIMPLE_POINT_GET_AFFINE_COORDINATES_GFP 105
1153 # define EC_F_EC_GFP_SIMPLE_POINT_SET_AFFINE_COORDINATES  168
1154 # define EC_F_EC_GFP_SIMPLE_POINT_SET_AFFINE_COORDINATES_GFP 128
1155 # define EC_F_EC_GFP_SIMPLE_SET_COMPRESSED_COORDINATES    169
1156 # define EC_F_EC_GFP_SIMPLE_SET_COMPRESSED_COORDINATES_GFP 129
1157 # define EC_F_EC_GROUP_CHECK                              170
1158 # define EC_F_EC_GROUP_CHECK_DISCRIMINANT                 171
1159 # define EC_F_EC_GROUP_COPY                               106
1160 # define EC_F_EC_GROUP_GET0_GENERATOR                     139
1161 # define EC_F_EC_GROUP_GET_COFACTOR                       140
1162 # define EC_F_EC_GROUP_GET_CURVE_GF2M                     172
1163 # define EC_F_EC_GROUP_GET_CURVE_GFP                      130
1164 # define EC_F_EC_GROUP_GET_DEGREE                         173
1165 # define EC_F_EC_GROUP_GET_ORDER                          141
1166 # define EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS              193
1167 # define EC_F_EC_GROUP_GET_TRINOMIAL_BASIS                194
1168 # define EC_F_EC_GROUP_NEW                                108
1169 # define EC_F_EC_GROUP_NEW_BY_CURVE_NAME                  174
1170 # define EC_F_EC_GROUP_NEW_FROM_DATA                      175
1171 # define EC_F_EC_GROUP_PRECOMPUTE_MULT                    142
1172 # define EC_F_EC_GROUP_SET_CURVE_GF2M                     176
1173 # define EC_F_EC_GROUP_SET_CURVE_GFP                      109
1174 # define EC_F_EC_GROUP_SET_EXTRA_DATA                     110
1175 # define EC_F_EC_GROUP_SET_GENERATOR                      111
1176 # define EC_F_EC_KEY_CHECK_KEY                            177
1177 # define EC_F_EC_KEY_COPY                                 178
1178 # define EC_F_EC_KEY_GENERATE_KEY                         179
1179 # define EC_F_EC_KEY_NEW                                  182
1180 # define EC_F_EC_KEY_PRINT                                180
1181 # define EC_F_EC_KEY_PRINT_FP                             181
1182 # define EC_F_EC_KEY_SET_PUBLIC_KEY_AFFINE_COORDINATES    229
1183 # define EC_F_EC_POINTS_MAKE_AFFINE                       136
1184 # define EC_F_EC_POINT_ADD                                112
1185 # define EC_F_EC_POINT_CMP                                113
1186 # define EC_F_EC_POINT_COPY                               114
1187 # define EC_F_EC_POINT_DBL                                115
1188 # define EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M        183
1189 # define EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP         116
1190 # define EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP    117
1191 # define EC_F_EC_POINT_INVERT                             210
1192 # define EC_F_EC_POINT_IS_AT_INFINITY                     118
1193 # define EC_F_EC_POINT_IS_ON_CURVE                        119
1194 # define EC_F_EC_POINT_MAKE_AFFINE                        120
1195 # define EC_F_EC_POINT_MUL                                184
1196 # define EC_F_EC_POINT_NEW                                121
1197 # define EC_F_EC_POINT_OCT2POINT                          122
1198 # define EC_F_EC_POINT_POINT2OCT                          123
1199 # define EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M        185
1200 # define EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP         124
1201 # define EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M    186
1202 # define EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP     125
1203 # define EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP    126
1204 # define EC_F_EC_POINT_SET_TO_INFINITY                    127
1205 # define EC_F_EC_PRE_COMP_DUP                             207
1206 # define EC_F_EC_PRE_COMP_NEW                             196
1207 # define EC_F_EC_WNAF_MUL                                 187
1208 # define EC_F_EC_WNAF_PRECOMPUTE_MULT                     188
1209 # define EC_F_I2D_ECPARAMETERS                            190
1210 # define EC_F_I2D_ECPKPARAMETERS                          191
1211 # define EC_F_I2D_ECPRIVATEKEY                            192
1212 # define EC_F_I2O_ECPUBLICKEY                             151
1213 # define EC_F_NISTP224_PRE_COMP_NEW                       227
1214 # define EC_F_NISTP256_PRE_COMP_NEW                       236
1215 # define EC_F_NISTP521_PRE_COMP_NEW                       237
1216 # define EC_F_ECP_NISTZ256_GET_AFFINE                     240
1217 # define EC_F_ECP_NISTZ256_POINTS_MUL                     241
1218 # define EC_F_ECP_NISTZ256_WINDOWED_MUL                   242
1219 # define EC_F_ECP_NISTZ256_MULT_PRECOMPUTE                243
1220 # define EC_F_ECP_NISTZ256_PRE_COMP_NEW                   244
1221 # define EC_F_O2I_ECPUBLICKEY                             152
1222 # define EC_F_OLD_EC_PRIV_DECODE                          222
1223 # define EC_F_PKEY_EC_CTRL                                197
1224 # define EC_F_PKEY_EC_CTRL_STR                            198
1225 # define EC_F_PKEY_EC_DERIVE                              217
1226 # define EC_F_PKEY_EC_KEYGEN                              199
1227 # define EC_F_PKEY_EC_PARAMGEN                            219
1228 # define EC_F_PKEY_EC_SIGN                                218
1229
1230 /* Reason codes. */
1231 # define EC_R_ASN1_ERROR                                  115
1232 # define EC_R_ASN1_UNKNOWN_FIELD                          116
1233 # define EC_R_BIGNUM_OUT_OF_RANGE                         144
1234 # define EC_R_BUFFER_TOO_SMALL                            100
1235 # define EC_R_COORDINATES_OUT_OF_RANGE                    146
1236 # define EC_R_D2I_ECPKPARAMETERS_FAILURE                  117
1237 # define EC_R_DECODE_ERROR                                142
1238 # define EC_R_DISCRIMINANT_IS_ZERO                        118
1239 # define EC_R_EC_GROUP_NEW_BY_NAME_FAILURE                119
1240 # define EC_R_FIELD_TOO_LARGE                             143
1241 # define EC_R_GF2M_NOT_SUPPORTED                          147
1242 # define EC_R_GROUP2PKPARAMETERS_FAILURE                  120
1243 # define EC_R_I2D_ECPKPARAMETERS_FAILURE                  121
1244 # define EC_R_INCOMPATIBLE_OBJECTS                        101
1245 # define EC_R_INVALID_ARGUMENT                            112
1246 # define EC_R_INVALID_COMPRESSED_POINT                    110
1247 # define EC_R_INVALID_COMPRESSION_BIT                     109
1248 # define EC_R_INVALID_CURVE                               141
1249 # define EC_R_INVALID_DIGEST                              151
1250 # define EC_R_INVALID_DIGEST_TYPE                         138
1251 # define EC_R_INVALID_ENCODING                            102
1252 # define EC_R_INVALID_FIELD                               103
1253 # define EC_R_INVALID_FORM                                104
1254 # define EC_R_INVALID_GROUP_ORDER                         122
1255 # define EC_R_INVALID_PENTANOMIAL_BASIS                   132
1256 # define EC_R_INVALID_PRIVATE_KEY                         123
1257 # define EC_R_INVALID_TRINOMIAL_BASIS                     137
1258 # define EC_R_KDF_PARAMETER_ERROR                         148
1259 # define EC_R_KEYS_NOT_SET                                140
1260 # define EC_R_MISSING_PARAMETERS                          124
1261 # define EC_R_MISSING_PRIVATE_KEY                         125
1262 # define EC_R_NOT_A_NIST_PRIME                            135
1263 # define EC_R_NOT_A_SUPPORTED_NIST_PRIME                  136
1264 # define EC_R_NOT_IMPLEMENTED                             126
1265 # define EC_R_NOT_INITIALIZED                             111
1266 # define EC_R_NO_FIELD_MOD                                133
1267 # define EC_R_NO_PARAMETERS_SET                           139
1268 # define EC_R_PASSED_NULL_PARAMETER                       134
1269 # define EC_R_PEER_KEY_ERROR                              149
1270 # define EC_R_PKPARAMETERS2GROUP_FAILURE                  127
1271 # define EC_R_POINT_AT_INFINITY                           106
1272 # define EC_R_POINT_IS_NOT_ON_CURVE                       107
1273 # define EC_R_SHARED_INFO_ERROR                           150
1274 # define EC_R_SLOT_FULL                                   108
1275 # define EC_R_UNDEFINED_GENERATOR                         113
1276 # define EC_R_UNDEFINED_ORDER                             128
1277 # define EC_R_UNKNOWN_GROUP                               129
1278 # define EC_R_UNKNOWN_ORDER                               114
1279 # define EC_R_UNSUPPORTED_FIELD                           131
1280 # define EC_R_WRONG_CURVE_PARAMETERS                      145
1281 # define EC_R_WRONG_ORDER                                 130
1282
1283 #ifdef  __cplusplus
1284 }
1285 #endif
1286 #endif