1/*
2 * Copyright 2002-2023 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 OPENSSL_EC_H
12# define OPENSSL_EC_H
13# pragma once
14
15# include <openssl/macros.h>
16# ifndef OPENSSL_NO_DEPRECATED_3_0
17# define HEADER_EC_H
18# endif
19
20# include <openssl/opensslconf.h>
21# include <openssl/types.h>
22
23# include <string.h>
24
25# ifdef __cplusplus
26extern "C" {
27# endif
28
29/* Values for EVP_PKEY_CTX_set_ec_param_enc() */
30# define OPENSSL_EC_EXPLICIT_CURVE 0x000
31# define OPENSSL_EC_NAMED_CURVE 0x001
32
33int EVP_PKEY_CTX_set_ec_paramgen_curve_nid(EVP_PKEY_CTX *ctx, int nid);
34int EVP_PKEY_CTX_set_ec_param_enc(EVP_PKEY_CTX *ctx, int param_enc);
35int EVP_PKEY_CTX_set_ecdh_cofactor_mode(EVP_PKEY_CTX *ctx, int cofactor_mode);
36int EVP_PKEY_CTX_get_ecdh_cofactor_mode(EVP_PKEY_CTX *ctx);
37
38int EVP_PKEY_CTX_set_ecdh_kdf_type(EVP_PKEY_CTX *ctx, int kdf);
39int EVP_PKEY_CTX_get_ecdh_kdf_type(EVP_PKEY_CTX *ctx);
40
41int EVP_PKEY_CTX_set_ecdh_kdf_md(EVP_PKEY_CTX *ctx, const EVP_MD *md);
42int EVP_PKEY_CTX_get_ecdh_kdf_md(EVP_PKEY_CTX *ctx, const EVP_MD **md);
43
44int EVP_PKEY_CTX_set_ecdh_kdf_outlen(EVP_PKEY_CTX *ctx, int len);
45int EVP_PKEY_CTX_get_ecdh_kdf_outlen(EVP_PKEY_CTX *ctx, int *len);
46
47int EVP_PKEY_CTX_set0_ecdh_kdf_ukm(EVP_PKEY_CTX *ctx, unsigned char *ukm,
48 int len);
49# ifndef OPENSSL_NO_DEPRECATED_3_0
50OSSL_DEPRECATEDIN_3_0
51int EVP_PKEY_CTX_get0_ecdh_kdf_ukm(EVP_PKEY_CTX *ctx, unsigned char **ukm);
52# endif
53
54# define EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID (EVP_PKEY_ALG_CTRL + 1)
55# define EVP_PKEY_CTRL_EC_PARAM_ENC (EVP_PKEY_ALG_CTRL + 2)
56# define EVP_PKEY_CTRL_EC_ECDH_COFACTOR (EVP_PKEY_ALG_CTRL + 3)
57# define EVP_PKEY_CTRL_EC_KDF_TYPE (EVP_PKEY_ALG_CTRL + 4)
58# define EVP_PKEY_CTRL_EC_KDF_MD (EVP_PKEY_ALG_CTRL + 5)
59# define EVP_PKEY_CTRL_GET_EC_KDF_MD (EVP_PKEY_ALG_CTRL + 6)
60# define EVP_PKEY_CTRL_EC_KDF_OUTLEN (EVP_PKEY_ALG_CTRL + 7)
61# define EVP_PKEY_CTRL_GET_EC_KDF_OUTLEN (EVP_PKEY_ALG_CTRL + 8)
62# define EVP_PKEY_CTRL_EC_KDF_UKM (EVP_PKEY_ALG_CTRL + 9)
63# define EVP_PKEY_CTRL_GET_EC_KDF_UKM (EVP_PKEY_ALG_CTRL + 10)
64
65/* KDF types */
66# define EVP_PKEY_ECDH_KDF_NONE 1
67# define EVP_PKEY_ECDH_KDF_X9_63 2
68/*
69 * The old name for EVP_PKEY_ECDH_KDF_X9_63
70 * The ECDH KDF specification has been mistakenly attributed to ANSI X9.62,
71 * it is actually specified in ANSI X9.63.
72 * This identifier is retained for backwards compatibility
73 */
74# define EVP_PKEY_ECDH_KDF_X9_62 EVP_PKEY_ECDH_KDF_X9_63
75
76/** Enum for the point conversion form as defined in X9.62 (ECDSA)
77 * for the encoding of a elliptic curve point (x,y) */
78typedef enum {
79 /** the point is encoded as z||x, where the octet z specifies
80 * which solution of the quadratic equation y is */
81 POINT_CONVERSION_COMPRESSED = 2,
82 /** the point is encoded as z||x||y, where z is the octet 0x04 */
83 POINT_CONVERSION_UNCOMPRESSED = 4,
84 /** the point is encoded as z||x||y, where the octet z specifies
85 * which solution of the quadratic equation y is */
86 POINT_CONVERSION_HYBRID = 6
87} point_conversion_form_t;
88
89const char *OSSL_EC_curve_nid2name(int nid);
90
91# ifndef OPENSSL_NO_STDIO
92# include <stdio.h>
93# endif
94# ifndef OPENSSL_NO_EC
95# include <openssl/asn1.h>
96# include <openssl/symhacks.h>
97# ifndef OPENSSL_NO_DEPRECATED_1_1_0
98# include <openssl/bn.h>
99# endif
100# include <openssl/ecerr.h>
101
102# ifndef OPENSSL_ECC_MAX_FIELD_BITS
103# define OPENSSL_ECC_MAX_FIELD_BITS 661
104# endif
105
106# include <openssl/params.h>
107# ifndef OPENSSL_NO_DEPRECATED_3_0
108typedef struct ec_method_st EC_METHOD;
109# endif
110typedef struct ec_group_st EC_GROUP;
111typedef struct ec_point_st EC_POINT;
112typedef struct ecpk_parameters_st ECPKPARAMETERS;
113typedef struct ec_parameters_st ECPARAMETERS;
114
115/********************************************************************/
116/* EC_METHODs for curves over GF(p) */
117/********************************************************************/
118
119# ifndef OPENSSL_NO_DEPRECATED_3_0
120/** Returns the basic GFp ec methods which provides the basis for the
121 * optimized methods.
122 * \return EC_METHOD object
123 */
124OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_simple_method(void);
125
126/** Returns GFp methods using montgomery multiplication.
127 * \return EC_METHOD object
128 */
129OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_mont_method(void);
130
131/** Returns GFp methods using optimized methods for NIST recommended curves
132 * \return EC_METHOD object
133 */
134OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_nist_method(void);
135
136# ifndef OPENSSL_NO_EC_NISTP_64_GCC_128
137/** Returns 64-bit optimized methods for nistp224
138 * \return EC_METHOD object
139 */
140OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_nistp224_method(void);
141
142/** Returns 64-bit optimized methods for nistp256
143 * \return EC_METHOD object
144 */
145OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_nistp256_method(void);
146
147/** Returns 64-bit optimized methods for nistp521
148 * \return EC_METHOD object
149 */
150OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_nistp521_method(void);
151# endif /* OPENSSL_NO_EC_NISTP_64_GCC_128 */
152
153# ifndef OPENSSL_NO_EC2M
154/********************************************************************/
155/* EC_METHOD for curves over GF(2^m) */
156/********************************************************************/
157
158/** Returns the basic GF2m ec method
159 * \return EC_METHOD object
160 */
161OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GF2m_simple_method(void);
162
163# endif
164
165/********************************************************************/
166/* EC_GROUP functions */
167/********************************************************************/
168
169/**
170 * Creates a new EC_GROUP object
171 * \param meth EC_METHOD to use
172 * \return newly created EC_GROUP object or NULL in case of an error.
173 */
174OSSL_DEPRECATEDIN_3_0 EC_GROUP *EC_GROUP_new(const EC_METHOD *meth);
175
176/** Clears and frees a EC_GROUP object
177 * \param group EC_GROUP object to be cleared and freed.
178 */
179OSSL_DEPRECATEDIN_3_0 void EC_GROUP_clear_free(EC_GROUP *group);
180
181/** Returns the EC_METHOD of the EC_GROUP object.
182 * \param group EC_GROUP object
183 * \return EC_METHOD used in this EC_GROUP object.
184 */
185OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group);
186
187/** Returns the field type of the EC_METHOD.
188 * \param meth EC_METHOD object
189 * \return NID of the underlying field type OID.
190 */
191OSSL_DEPRECATEDIN_3_0 int EC_METHOD_get_field_type(const EC_METHOD *meth);
192# endif /* OPENSSL_NO_DEPRECATED_3_0 */
193
194/** Frees a EC_GROUP object
195 * \param group EC_GROUP object to be freed.
196 */
197void EC_GROUP_free(EC_GROUP *group);
198
199/** Copies EC_GROUP objects. Note: both EC_GROUPs must use the same EC_METHOD.
200 * \param dst destination EC_GROUP object
201 * \param src source EC_GROUP object
202 * \return 1 on success and 0 if an error occurred.
203 */
204int EC_GROUP_copy(EC_GROUP *dst, const EC_GROUP *src);
205
206/** Creates a new EC_GROUP object and copies the content
207 * form src to the newly created EC_KEY object
208 * \param src source EC_GROUP object
209 * \return newly created EC_GROUP object or NULL in case of an error.
210 */
211EC_GROUP *EC_GROUP_dup(const EC_GROUP *src);
212
213/** Sets the generator and its order/cofactor of a EC_GROUP object.
214 * \param group EC_GROUP object
215 * \param generator EC_POINT object with the generator.
216 * \param order the order of the group generated by the generator.
217 * \param cofactor the index of the sub-group generated by the generator
218 * in the group of all points on the elliptic curve.
219 * \return 1 on success and 0 if an error occurred
220 */
221int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator,
222 const BIGNUM *order, const BIGNUM *cofactor);
223
224/** Returns the generator of a EC_GROUP object.
225 * \param group EC_GROUP object
226 * \return the currently used generator (possibly NULL).
227 */
228const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group);
229
230/** Returns the montgomery data for order(Generator)
231 * \param group EC_GROUP object
232 * \return the currently used montgomery data (possibly NULL).
233*/
234BN_MONT_CTX *EC_GROUP_get_mont_data(const EC_GROUP *group);
235
236/** Gets the order of a EC_GROUP
237 * \param group EC_GROUP object
238 * \param order BIGNUM to which the order is copied
239 * \param ctx unused
240 * \return 1 on success and 0 if an error occurred
241 */
242int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx);
243
244/** Gets the order of an EC_GROUP
245 * \param group EC_GROUP object
246 * \return the group order
247 */
248const BIGNUM *EC_GROUP_get0_order(const EC_GROUP *group);
249
250/** Gets the number of bits of the order of an EC_GROUP
251 * \param group EC_GROUP object
252 * \return number of bits of group order.
253 */
254int EC_GROUP_order_bits(const EC_GROUP *group);
255
256/** Gets the cofactor of a EC_GROUP
257 * \param group EC_GROUP object
258 * \param cofactor BIGNUM to which the cofactor is copied
259 * \param ctx unused
260 * \return 1 on success and 0 if an error occurred
261 */
262int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor,
263 BN_CTX *ctx);
264
265/** Gets the cofactor of an EC_GROUP
266 * \param group EC_GROUP object
267 * \return the group cofactor
268 */
269const BIGNUM *EC_GROUP_get0_cofactor(const EC_GROUP *group);
270
271/** Sets the name of a EC_GROUP object
272 * \param group EC_GROUP object
273 * \param nid NID of the curve name OID
274 */
275void EC_GROUP_set_curve_name(EC_GROUP *group, int nid);
276
277/** Returns the curve name of a EC_GROUP object
278 * \param group EC_GROUP object
279 * \return NID of the curve name OID or 0 if not set.
280 */
281int EC_GROUP_get_curve_name(const EC_GROUP *group);
282
283/** Gets the field of an EC_GROUP
284 * \param group EC_GROUP object
285 * \return the group field
286 */
287const BIGNUM *EC_GROUP_get0_field(const EC_GROUP *group);
288
289/** Returns the field type of the EC_GROUP.
290 * \param group EC_GROUP object
291 * \return NID of the underlying field type OID.
292 */
293int EC_GROUP_get_field_type(const EC_GROUP *group);
294
295void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag);
296int EC_GROUP_get_asn1_flag(const EC_GROUP *group);
297
298void EC_GROUP_set_point_conversion_form(EC_GROUP *group,
299 point_conversion_form_t form);
300point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP *);
301
302unsigned char *EC_GROUP_get0_seed(const EC_GROUP *x);
303size_t EC_GROUP_get_seed_len(const EC_GROUP *);
304size_t EC_GROUP_set_seed(EC_GROUP *, const unsigned char *, size_t len);
305
306/** Sets the parameters of an ec curve defined by y^2 = x^3 + a*x + b (for GFp)
307 * or y^2 + x*y = x^3 + a*x^2 + b (for GF2m)
308 * \param group EC_GROUP object
309 * \param p BIGNUM with the prime number (GFp) or the polynomial
310 * defining the underlying field (GF2m)
311 * \param a BIGNUM with parameter a of the equation
312 * \param b BIGNUM with parameter b of the equation
313 * \param ctx BN_CTX object (optional)
314 * \return 1 on success and 0 if an error occurred
315 */
316int EC_GROUP_set_curve(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a,
317 const BIGNUM *b, BN_CTX *ctx);
318
319/** Gets the parameters of the ec curve defined by y^2 = x^3 + a*x + b (for GFp)
320 * or y^2 + x*y = x^3 + a*x^2 + b (for GF2m)
321 * \param group EC_GROUP object
322 * \param p BIGNUM with the prime number (GFp) or the polynomial
323 * defining the underlying field (GF2m)
324 * \param a BIGNUM for parameter a of the equation
325 * \param b BIGNUM for parameter b of the equation
326 * \param ctx BN_CTX object (optional)
327 * \return 1 on success and 0 if an error occurred
328 */
329int EC_GROUP_get_curve(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b,
330 BN_CTX *ctx);
331
332# ifndef OPENSSL_NO_DEPRECATED_3_0
333/** Sets the parameters of an ec curve. Synonym for EC_GROUP_set_curve
334 * \param group EC_GROUP object
335 * \param p BIGNUM with the prime number (GFp) or the polynomial
336 * defining the underlying field (GF2m)
337 * \param a BIGNUM with parameter a of the equation
338 * \param b BIGNUM with parameter b of the equation
339 * \param ctx BN_CTX object (optional)
340 * \return 1 on success and 0 if an error occurred
341 */
342OSSL_DEPRECATEDIN_3_0 int EC_GROUP_set_curve_GFp(EC_GROUP *group,
343 const BIGNUM *p,
344 const BIGNUM *a,
345 const BIGNUM *b,
346 BN_CTX *ctx);
347
348/** Gets the parameters of an ec curve. Synonym for EC_GROUP_get_curve
349 * \param group EC_GROUP object
350 * \param p BIGNUM with the prime number (GFp) or the polynomial
351 * defining the underlying field (GF2m)
352 * \param a BIGNUM for parameter a of the equation
353 * \param b BIGNUM for parameter b of the equation
354 * \param ctx BN_CTX object (optional)
355 * \return 1 on success and 0 if an error occurred
356 */
357OSSL_DEPRECATEDIN_3_0 int EC_GROUP_get_curve_GFp(const EC_GROUP *group,
358 BIGNUM *p,
359 BIGNUM *a, BIGNUM *b,
360 BN_CTX *ctx);
361
362# ifndef OPENSSL_NO_EC2M
363/** Sets the parameter of an ec curve. Synonym for EC_GROUP_set_curve
364 * \param group EC_GROUP object
365 * \param p BIGNUM with the prime number (GFp) or the polynomial
366 * defining the underlying field (GF2m)
367 * \param a BIGNUM with parameter a of the equation
368 * \param b BIGNUM with parameter b of the equation
369 * \param ctx BN_CTX object (optional)
370 * \return 1 on success and 0 if an error occurred
371 */
372OSSL_DEPRECATEDIN_3_0 int EC_GROUP_set_curve_GF2m(EC_GROUP *group,
373 const BIGNUM *p,
374 const BIGNUM *a,
375 const BIGNUM *b,
376 BN_CTX *ctx);
377
378/** Gets the parameters of an ec curve. Synonym for EC_GROUP_get_curve
379 * \param group EC_GROUP object
380 * \param p BIGNUM with the prime number (GFp) or the polynomial
381 * defining the underlying field (GF2m)
382 * \param a BIGNUM for parameter a of the equation
383 * \param b BIGNUM for parameter b of the equation
384 * \param ctx BN_CTX object (optional)
385 * \return 1 on success and 0 if an error occurred
386 */
387OSSL_DEPRECATEDIN_3_0 int EC_GROUP_get_curve_GF2m(const EC_GROUP *group,
388 BIGNUM *p,
389 BIGNUM *a, BIGNUM *b,
390 BN_CTX *ctx);
391# endif /* OPENSSL_NO_EC2M */
392# endif /* OPENSSL_NO_DEPRECATED_3_0 */
393
394/** Returns the number of bits needed to represent a field element
395 * \param group EC_GROUP object
396 * \return number of bits needed to represent a field element
397 */
398int EC_GROUP_get_degree(const EC_GROUP *group);
399
400/** Checks whether the parameter in the EC_GROUP define a valid ec group
401 * \param group EC_GROUP object
402 * \param ctx BN_CTX object (optional)
403 * \return 1 if group is a valid ec group and 0 otherwise
404 */
405int EC_GROUP_check(const EC_GROUP *group, BN_CTX *ctx);
406
407/** Checks whether the discriminant of the elliptic curve is zero or not
408 * \param group EC_GROUP object
409 * \param ctx BN_CTX object (optional)
410 * \return 1 if the discriminant is not zero and 0 otherwise
411 */
412int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx);
413
414/** Compares two EC_GROUP objects
415 * \param a first EC_GROUP object
416 * \param b second EC_GROUP object
417 * \param ctx BN_CTX object (optional)
418 * \return 0 if the groups are equal, 1 if not, or -1 on error
419 */
420int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx);
421
422/*
423 * EC_GROUP_new_GF*() calls EC_GROUP_new() and EC_GROUP_set_GF*() after
424 * choosing an appropriate EC_METHOD
425 */
426
427/** Creates a new EC_GROUP object with the specified parameters defined
428 * over GFp (defined by the equation y^2 = x^3 + a*x + b)
429 * \param p BIGNUM with the prime number
430 * \param a BIGNUM with the parameter a of the equation
431 * \param b BIGNUM with the parameter b of the equation
432 * \param ctx BN_CTX object (optional)
433 * \return newly created EC_GROUP object with the specified parameters
434 */
435EC_GROUP *EC_GROUP_new_curve_GFp(const BIGNUM *p, const BIGNUM *a,
436 const BIGNUM *b, BN_CTX *ctx);
437# ifndef OPENSSL_NO_EC2M
438/** Creates a new EC_GROUP object with the specified parameters defined
439 * over GF2m (defined by the equation y^2 + x*y = x^3 + a*x^2 + b)
440 * \param p BIGNUM with the polynomial defining the underlying field
441 * \param a BIGNUM with the parameter a of the equation
442 * \param b BIGNUM with the parameter b of the equation
443 * \param ctx BN_CTX object (optional)
444 * \return newly created EC_GROUP object with the specified parameters
445 */
446EC_GROUP *EC_GROUP_new_curve_GF2m(const BIGNUM *p, const BIGNUM *a,
447 const BIGNUM *b, BN_CTX *ctx);
448# endif
449
450/**
451 * Creates a EC_GROUP object with a curve specified by parameters.
452 * The parameters may be explicit or a named curve,
453 * \param params A list of parameters describing the group.
454 * \param libctx The associated library context or NULL for the default
455 * context
456 * \param propq A property query string
457 * \return newly created EC_GROUP object with specified parameters or NULL
458 * if an error occurred
459 */
460EC_GROUP *EC_GROUP_new_from_params(const OSSL_PARAM params[],
461 OSSL_LIB_CTX *libctx, const char *propq);
462
463/**
464 * Creates an OSSL_PARAM array with the parameters describing the given
465 * EC_GROUP.
466 * The resulting parameters may contain an explicit or a named curve depending
467 * on the EC_GROUP.
468 * \param group pointer to the EC_GROUP object
469 * \param libctx The associated library context or NULL for the default
470 * context
471 * \param propq A property query string
472 * \param bnctx BN_CTX object (optional)
473 * \return newly created OSSL_PARAM array with the parameters
474 * describing the given EC_GROUP or NULL if an error occurred
475 */
476OSSL_PARAM *EC_GROUP_to_params(const EC_GROUP *group, OSSL_LIB_CTX *libctx,
477 const char *propq, BN_CTX *bnctx);
478
479/**
480 * Creates a EC_GROUP object with a curve specified by a NID
481 * \param libctx The associated library context or NULL for the default
482 * context
483 * \param propq A property query string
484 * \param nid NID of the OID of the curve name
485 * \return newly created EC_GROUP object with specified curve or NULL
486 * if an error occurred
487 */
488EC_GROUP *EC_GROUP_new_by_curve_name_ex(OSSL_LIB_CTX *libctx, const char *propq,
489 int nid);
490
491/**
492 * Creates a EC_GROUP object with a curve specified by a NID. Same as
493 * EC_GROUP_new_by_curve_name_ex but the libctx and propq are always
494 * NULL.
495 * \param nid NID of the OID of the curve name
496 * \return newly created EC_GROUP object with specified curve or NULL
497 * if an error occurred
498 */
499EC_GROUP *EC_GROUP_new_by_curve_name(int nid);
500
501/** Creates a new EC_GROUP object from an ECPARAMETERS object
502 * \param params pointer to the ECPARAMETERS object
503 * \return newly created EC_GROUP object with specified curve or NULL
504 * if an error occurred
505 */
506EC_GROUP *EC_GROUP_new_from_ecparameters(const ECPARAMETERS *params);
507
508/** Creates an ECPARAMETERS object for the given EC_GROUP object.
509 * \param group pointer to the EC_GROUP object
510 * \param params pointer to an existing ECPARAMETERS object or NULL
511 * \return pointer to the new ECPARAMETERS object or NULL
512 * if an error occurred.
513 */
514ECPARAMETERS *EC_GROUP_get_ecparameters(const EC_GROUP *group,
515 ECPARAMETERS *params);
516
517/** Creates a new EC_GROUP object from an ECPKPARAMETERS object
518 * \param params pointer to an existing ECPKPARAMETERS object, or NULL
519 * \return newly created EC_GROUP object with specified curve, or NULL
520 * if an error occurred
521 */
522EC_GROUP *EC_GROUP_new_from_ecpkparameters(const ECPKPARAMETERS *params);
523
524/** Creates an ECPKPARAMETERS object for the given EC_GROUP object.
525 * \param group pointer to the EC_GROUP object
526 * \param params pointer to an existing ECPKPARAMETERS object or NULL
527 * \return pointer to the new ECPKPARAMETERS object or NULL
528 * if an error occurred.
529 */
530ECPKPARAMETERS *EC_GROUP_get_ecpkparameters(const EC_GROUP *group,
531 ECPKPARAMETERS *params);
532
533/********************************************************************/
534/* handling of internal curves */
535/********************************************************************/
536
537typedef struct {
538 int nid;
539 const char *comment;
540} EC_builtin_curve;
541
542/*
543 * EC_builtin_curves(EC_builtin_curve *r, size_t size) returns number of all
544 * available curves or zero if a error occurred. In case r is not zero,
545 * nitems EC_builtin_curve structures are filled with the data of the first
546 * nitems internal groups
547 */
548size_t EC_get_builtin_curves(EC_builtin_curve *r, size_t nitems);
549
550const char *EC_curve_nid2nist(int nid);
551int EC_curve_nist2nid(const char *name);
552int EC_GROUP_check_named_curve(const EC_GROUP *group, int nist_only,
553 BN_CTX *ctx);
554
555/********************************************************************/
556/* EC_POINT functions */
557/********************************************************************/
558
559/** Creates a new EC_POINT object for the specified EC_GROUP
560 * \param group EC_GROUP the underlying EC_GROUP object
561 * \return newly created EC_POINT object or NULL if an error occurred
562 */
563EC_POINT *EC_POINT_new(const EC_GROUP *group);
564
565/** Frees a EC_POINT object
566 * \param point EC_POINT object to be freed
567 */
568void EC_POINT_free(EC_POINT *point);
569
570/** Clears and frees a EC_POINT object
571 * \param point EC_POINT object to be cleared and freed
572 */
573void EC_POINT_clear_free(EC_POINT *point);
574
575/** Copies EC_POINT object
576 * \param dst destination EC_POINT object
577 * \param src source EC_POINT object
578 * \return 1 on success and 0 if an error occurred
579 */
580int EC_POINT_copy(EC_POINT *dst, const EC_POINT *src);
581
582/** Creates a new EC_POINT object and copies the content of the supplied
583 * EC_POINT
584 * \param src source EC_POINT object
585 * \param group underlying the EC_GROUP object
586 * \return newly created EC_POINT object or NULL if an error occurred
587 */
588EC_POINT *EC_POINT_dup(const EC_POINT *src, const EC_GROUP *group);
589
590/** Sets a point to infinity (neutral element)
591 * \param group underlying EC_GROUP object
592 * \param point EC_POINT to set to infinity
593 * \return 1 on success and 0 if an error occurred
594 */
595int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point);
596
597# ifndef OPENSSL_NO_DEPRECATED_3_0
598/** Returns the EC_METHOD used in EC_POINT object
599 * \param point EC_POINT object
600 * \return the EC_METHOD used
601 */
602OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_POINT_method_of(const EC_POINT *point);
603
604/** Sets the jacobian projective coordinates of a EC_POINT over GFp
605 * \param group underlying EC_GROUP object
606 * \param p EC_POINT object
607 * \param x BIGNUM with the x-coordinate
608 * \param y BIGNUM with the y-coordinate
609 * \param z BIGNUM with the z-coordinate
610 * \param ctx BN_CTX object (optional)
611 * \return 1 on success and 0 if an error occurred
612 */
613OSSL_DEPRECATEDIN_3_0 int EC_POINT_set_Jprojective_coordinates_GFp
614 (const EC_GROUP *group, EC_POINT *p,
615 const BIGNUM *x, const BIGNUM *y, const BIGNUM *z,
616 BN_CTX *ctx);
617
618/** Gets the jacobian projective coordinates of a EC_POINT over GFp
619 * \param group underlying EC_GROUP object
620 * \param p EC_POINT object
621 * \param x BIGNUM for the x-coordinate
622 * \param y BIGNUM for the y-coordinate
623 * \param z BIGNUM for the z-coordinate
624 * \param ctx BN_CTX object (optional)
625 * \return 1 on success and 0 if an error occurred
626 */
627OSSL_DEPRECATEDIN_3_0 int EC_POINT_get_Jprojective_coordinates_GFp
628 (const EC_GROUP *group, const EC_POINT *p,
629 BIGNUM *x, BIGNUM *y, BIGNUM *z, BN_CTX *ctx);
630# endif /* OPENSSL_NO_DEPRECATED_3_0 */
631
632/** Sets the affine coordinates of an EC_POINT
633 * \param group underlying EC_GROUP object
634 * \param p EC_POINT object
635 * \param x BIGNUM with the x-coordinate
636 * \param y BIGNUM with the y-coordinate
637 * \param ctx BN_CTX object (optional)
638 * \return 1 on success and 0 if an error occurred
639 */
640int EC_POINT_set_affine_coordinates(const EC_GROUP *group, EC_POINT *p,
641 const BIGNUM *x, const BIGNUM *y,
642 BN_CTX *ctx);
643
644/** Gets the affine coordinates of an EC_POINT.
645 * \param group underlying EC_GROUP object
646 * \param p EC_POINT object
647 * \param x BIGNUM for the x-coordinate
648 * \param y BIGNUM for the y-coordinate
649 * \param ctx BN_CTX object (optional)
650 * \return 1 on success and 0 if an error occurred
651 */
652int EC_POINT_get_affine_coordinates(const EC_GROUP *group, const EC_POINT *p,
653 BIGNUM *x, BIGNUM *y, BN_CTX *ctx);
654
655# ifndef OPENSSL_NO_DEPRECATED_3_0
656/** Sets the affine coordinates of an EC_POINT. A synonym of
657 * EC_POINT_set_affine_coordinates
658 * \param group underlying EC_GROUP object
659 * \param p EC_POINT object
660 * \param x BIGNUM with the x-coordinate
661 * \param y BIGNUM with the y-coordinate
662 * \param ctx BN_CTX object (optional)
663 * \return 1 on success and 0 if an error occurred
664 */
665OSSL_DEPRECATEDIN_3_0 int EC_POINT_set_affine_coordinates_GFp
666 (const EC_GROUP *group, EC_POINT *p,
667 const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx);
668
669/** Gets the affine coordinates of an EC_POINT. A synonym of
670 * EC_POINT_get_affine_coordinates
671 * \param group underlying EC_GROUP object
672 * \param p EC_POINT object
673 * \param x BIGNUM for the x-coordinate
674 * \param y BIGNUM for the y-coordinate
675 * \param ctx BN_CTX object (optional)
676 * \return 1 on success and 0 if an error occurred
677 */
678OSSL_DEPRECATEDIN_3_0 int EC_POINT_get_affine_coordinates_GFp
679 (const EC_GROUP *group, const EC_POINT *p,
680 BIGNUM *x, BIGNUM *y, BN_CTX *ctx);
681# endif /* OPENSSL_NO_DEPRECATED_3_0 */
682
683/** Sets the x9.62 compressed coordinates of a EC_POINT
684 * \param group underlying EC_GROUP object
685 * \param p EC_POINT object
686 * \param x BIGNUM with x-coordinate
687 * \param y_bit integer with the y-Bit (either 0 or 1)
688 * \param ctx BN_CTX object (optional)
689 * \return 1 on success and 0 if an error occurred
690 */
691int EC_POINT_set_compressed_coordinates(const EC_GROUP *group, EC_POINT *p,
692 const BIGNUM *x, int y_bit,
693 BN_CTX *ctx);
694
695# ifndef OPENSSL_NO_DEPRECATED_3_0
696/** Sets the x9.62 compressed coordinates of a EC_POINT. A synonym of
697 * EC_POINT_set_compressed_coordinates
698 * \param group underlying EC_GROUP object
699 * \param p EC_POINT object
700 * \param x BIGNUM with x-coordinate
701 * \param y_bit integer with the y-Bit (either 0 or 1)
702 * \param ctx BN_CTX object (optional)
703 * \return 1 on success and 0 if an error occurred
704 */
705OSSL_DEPRECATEDIN_3_0 int EC_POINT_set_compressed_coordinates_GFp
706 (const EC_GROUP *group, EC_POINT *p,
707 const BIGNUM *x, int y_bit, BN_CTX *ctx);
708# ifndef OPENSSL_NO_EC2M
709/** Sets the affine coordinates of an EC_POINT. A synonym of
710 * EC_POINT_set_affine_coordinates
711 * \param group underlying EC_GROUP object
712 * \param p EC_POINT object
713 * \param x BIGNUM with the x-coordinate
714 * \param y BIGNUM with the y-coordinate
715 * \param ctx BN_CTX object (optional)
716 * \return 1 on success and 0 if an error occurred
717 */
718OSSL_DEPRECATEDIN_3_0 int EC_POINT_set_affine_coordinates_GF2m
719 (const EC_GROUP *group, EC_POINT *p,
720 const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx);
721
722/** Gets the affine coordinates of an EC_POINT. A synonym of
723 * EC_POINT_get_affine_coordinates
724 * \param group underlying EC_GROUP object
725 * \param p EC_POINT object
726 * \param x BIGNUM for the x-coordinate
727 * \param y BIGNUM for the y-coordinate
728 * \param ctx BN_CTX object (optional)
729 * \return 1 on success and 0 if an error occurred
730 */
731OSSL_DEPRECATEDIN_3_0 int EC_POINT_get_affine_coordinates_GF2m
732 (const EC_GROUP *group, const EC_POINT *p,
733 BIGNUM *x, BIGNUM *y, BN_CTX *ctx);
734
735/** Sets the x9.62 compressed coordinates of a EC_POINT. A synonym of
736 * EC_POINT_set_compressed_coordinates
737 * \param group underlying EC_GROUP object
738 * \param p EC_POINT object
739 * \param x BIGNUM with x-coordinate
740 * \param y_bit integer with the y-Bit (either 0 or 1)
741 * \param ctx BN_CTX object (optional)
742 * \return 1 on success and 0 if an error occurred
743 */
744OSSL_DEPRECATEDIN_3_0 int EC_POINT_set_compressed_coordinates_GF2m
745 (const EC_GROUP *group, EC_POINT *p,
746 const BIGNUM *x, int y_bit, BN_CTX *ctx);
747# endif
748# endif /* OPENSSL_NO_DEPRECATED_3_0 */
749
750/** Encodes a EC_POINT object to a octet string
751 * \param group underlying EC_GROUP object
752 * \param p EC_POINT object
753 * \param form point conversion form
754 * \param buf memory buffer for the result. If NULL the function returns
755 * required buffer size.
756 * \param len length of the memory buffer
757 * \param ctx BN_CTX object (optional)
758 * \return the length of the encoded octet string or 0 if an error occurred
759 */
760size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *p,
761 point_conversion_form_t form,
762 unsigned char *buf, size_t len, BN_CTX *ctx);
763
764/** Decodes a EC_POINT from a octet string
765 * \param group underlying EC_GROUP object
766 * \param p EC_POINT object
767 * \param buf memory buffer with the encoded ec point
768 * \param len length of the encoded ec point
769 * \param ctx BN_CTX object (optional)
770 * \return 1 on success and 0 if an error occurred
771 */
772int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *p,
773 const unsigned char *buf, size_t len, BN_CTX *ctx);
774
775/** Encodes an EC_POINT object to an allocated octet string
776 * \param group underlying EC_GROUP object
777 * \param point EC_POINT object
778 * \param form point conversion form
779 * \param pbuf returns pointer to allocated buffer
780 * \param ctx BN_CTX object (optional)
781 * \return the length of the encoded octet string or 0 if an error occurred
782 */
783size_t EC_POINT_point2buf(const EC_GROUP *group, const EC_POINT *point,
784 point_conversion_form_t form,
785 unsigned char **pbuf, BN_CTX *ctx);
786
787/* other interfaces to point2oct/oct2point: */
788# ifndef OPENSSL_NO_DEPRECATED_3_0
789OSSL_DEPRECATEDIN_3_0 BIGNUM *EC_POINT_point2bn(const EC_GROUP *,
790 const EC_POINT *,
791 point_conversion_form_t form,
792 BIGNUM *, BN_CTX *);
793OSSL_DEPRECATEDIN_3_0 EC_POINT *EC_POINT_bn2point(const EC_GROUP *,
794 const BIGNUM *,
795 EC_POINT *, BN_CTX *);
796# endif /* OPENSSL_NO_DEPRECATED_3_0 */
797
798char *EC_POINT_point2hex(const EC_GROUP *, const EC_POINT *,
799 point_conversion_form_t form, BN_CTX *);
800EC_POINT *EC_POINT_hex2point(const EC_GROUP *, const char *,
801 EC_POINT *, BN_CTX *);
802
803/********************************************************************/
804/* functions for doing EC_POINT arithmetic */
805/********************************************************************/
806
807/** Computes the sum of two EC_POINT
808 * \param group underlying EC_GROUP object
809 * \param r EC_POINT object for the result (r = a + b)
810 * \param a EC_POINT object with the first summand
811 * \param b EC_POINT object with the second summand
812 * \param ctx BN_CTX object (optional)
813 * \return 1 on success and 0 if an error occurred
814 */
815int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a,
816 const EC_POINT *b, BN_CTX *ctx);
817
818/** Computes the double of a EC_POINT
819 * \param group underlying EC_GROUP object
820 * \param r EC_POINT object for the result (r = 2 * a)
821 * \param a EC_POINT object
822 * \param ctx BN_CTX object (optional)
823 * \return 1 on success and 0 if an error occurred
824 */
825int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a,
826 BN_CTX *ctx);
827
828/** Computes the inverse of a EC_POINT
829 * \param group underlying EC_GROUP object
830 * \param a EC_POINT object to be inverted (it's used for the result as well)
831 * \param ctx BN_CTX object (optional)
832 * \return 1 on success and 0 if an error occurred
833 */
834int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx);
835
836/** Checks whether the point is the neutral element of the group
837 * \param group the underlying EC_GROUP object
838 * \param p EC_POINT object
839 * \return 1 if the point is the neutral element and 0 otherwise
840 */
841int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *p);
842
843/** Checks whether the point is on the curve
844 * \param group underlying EC_GROUP object
845 * \param point EC_POINT object to check
846 * \param ctx BN_CTX object (optional)
847 * \return 1 if the point is on the curve, 0 if not, or -1 on error
848 */
849int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point,
850 BN_CTX *ctx);
851
852/** Compares two EC_POINTs
853 * \param group underlying EC_GROUP object
854 * \param a first EC_POINT object
855 * \param b second EC_POINT object
856 * \param ctx BN_CTX object (optional)
857 * \return 1 if the points are not equal, 0 if they are, or -1 on error
858 */
859int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b,
860 BN_CTX *ctx);
861
862# ifndef OPENSSL_NO_DEPRECATED_3_0
863OSSL_DEPRECATEDIN_3_0 int EC_POINT_make_affine(const EC_GROUP *group,
864 EC_POINT *point, BN_CTX *ctx);
865OSSL_DEPRECATEDIN_3_0 int EC_POINTs_make_affine(const EC_GROUP *group, size_t num,
866 EC_POINT *points[], BN_CTX *ctx);
867
868/** Computes r = generator * n + sum_{i=0}^{num-1} p[i] * m[i]
869 * \param group underlying EC_GROUP object
870 * \param r EC_POINT object for the result
871 * \param n BIGNUM with the multiplier for the group generator (optional)
872 * \param num number further summands
873 * \param p array of size num of EC_POINT objects
874 * \param m array of size num of BIGNUM objects
875 * \param ctx BN_CTX object (optional)
876 * \return 1 on success and 0 if an error occurred
877 */
878OSSL_DEPRECATEDIN_3_0 int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r,
879 const BIGNUM *n, size_t num,
880 const EC_POINT *p[], const BIGNUM *m[],
881 BN_CTX *ctx);
882# endif /* OPENSSL_NO_DEPRECATED_3_0 */
883
884/** Computes r = generator * n + q * m
885 * \param group underlying EC_GROUP object
886 * \param r EC_POINT object for the result
887 * \param n BIGNUM with the multiplier for the group generator (optional)
888 * \param q EC_POINT object with the first factor of the second summand
889 * \param m BIGNUM with the second factor of the second summand
890 * \param ctx BN_CTX object (optional)
891 * \return 1 on success and 0 if an error occurred
892 */
893int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *n,
894 const EC_POINT *q, const BIGNUM *m, BN_CTX *ctx);
895
896# ifndef OPENSSL_NO_DEPRECATED_3_0
897/** Stores multiples of generator for faster point multiplication
898 * \param group EC_GROUP object
899 * \param ctx BN_CTX object (optional)
900 * \return 1 on success and 0 if an error occurred
901 */
902OSSL_DEPRECATEDIN_3_0 int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx);
903
904/** Reports whether a precomputation has been done
905 * \param group EC_GROUP object
906 * \return 1 if a pre-computation has been done and 0 otherwise
907 */
908OSSL_DEPRECATEDIN_3_0 int EC_GROUP_have_precompute_mult(const EC_GROUP *group);
909# endif /* OPENSSL_NO_DEPRECATED_3_0 */
910
911/********************************************************************/
912/* ASN1 stuff */
913/********************************************************************/
914
915DECLARE_ASN1_ITEM(ECPKPARAMETERS)
916DECLARE_ASN1_ALLOC_FUNCTIONS(ECPKPARAMETERS)
917DECLARE_ASN1_ITEM(ECPARAMETERS)
918DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
919
920/*
921 * EC_GROUP_get_basis_type() returns the NID of the basis type used to
922 * represent the field elements
923 */
924int EC_GROUP_get_basis_type(const EC_GROUP *);
925# ifndef OPENSSL_NO_EC2M
926int EC_GROUP_get_trinomial_basis(const EC_GROUP *, unsigned int *k);
927int EC_GROUP_get_pentanomial_basis(const EC_GROUP *, unsigned int *k1,
928 unsigned int *k2, unsigned int *k3);
929# endif
930
931EC_GROUP *d2i_ECPKParameters(EC_GROUP **, const unsigned char **in, long len);
932int i2d_ECPKParameters(const EC_GROUP *, unsigned char **out);
933
934# define d2i_ECPKParameters_bio(bp,x) \
935 ASN1_d2i_bio_of(EC_GROUP, NULL, d2i_ECPKParameters, bp, x)
936# define i2d_ECPKParameters_bio(bp,x) \
937 ASN1_i2d_bio_of(EC_GROUP, i2d_ECPKParameters, bp, x)
938# define d2i_ECPKParameters_fp(fp,x) \
939 (EC_GROUP *)ASN1_d2i_fp(NULL, (d2i_of_void *)d2i_ECPKParameters, (fp), \
940 (void **)(x))
941# define i2d_ECPKParameters_fp(fp,x) \
942 ASN1_i2d_fp((i2d_of_void *)i2d_ECPKParameters, (fp), (void *)(x))
943
944# ifndef OPENSSL_NO_DEPRECATED_3_0
945OSSL_DEPRECATEDIN_3_0 int ECPKParameters_print(BIO *bp, const EC_GROUP *x,
946 int off);
947# ifndef OPENSSL_NO_STDIO
948OSSL_DEPRECATEDIN_3_0 int ECPKParameters_print_fp(FILE *fp, const EC_GROUP *x,
949 int off);
950# endif
951# endif /* OPENSSL_NO_DEPRECATED_3_0 */
952
953/********************************************************************/
954/* EC_KEY functions */
955/********************************************************************/
956
957/* some values for the encoding_flag */
958# define EC_PKEY_NO_PARAMETERS 0x001
959# define EC_PKEY_NO_PUBKEY 0x002
960
961/* some values for the flags field */
962# define EC_FLAG_SM2_RANGE 0x0004
963# define EC_FLAG_COFACTOR_ECDH 0x1000
964# define EC_FLAG_CHECK_NAMED_GROUP 0x2000
965# define EC_FLAG_CHECK_NAMED_GROUP_NIST 0x4000
966# define EC_FLAG_CHECK_NAMED_GROUP_MASK \
967 (EC_FLAG_CHECK_NAMED_GROUP | EC_FLAG_CHECK_NAMED_GROUP_NIST)
968
969/* Deprecated flags - it was using 0x01..0x02 */
970# define EC_FLAG_NON_FIPS_ALLOW 0x0000
971# define EC_FLAG_FIPS_CHECKED 0x0000
972
973# ifndef OPENSSL_NO_DEPRECATED_3_0
974/**
975 * Creates a new EC_KEY object.
976 * \param ctx The library context for to use for this EC_KEY. May be NULL in
977 * which case the default library context is used.
978 * \return EC_KEY object or NULL if an error occurred.
979 */
980OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_new_ex(OSSL_LIB_CTX *ctx, const char *propq);
981
982/**
983 * Creates a new EC_KEY object. Same as calling EC_KEY_new_ex with a
984 * NULL library context
985 * \return EC_KEY object or NULL if an error occurred.
986 */
987OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_new(void);
988
989OSSL_DEPRECATEDIN_3_0 int EC_KEY_get_flags(const EC_KEY *key);
990
991OSSL_DEPRECATEDIN_3_0 void EC_KEY_set_flags(EC_KEY *key, int flags);
992
993OSSL_DEPRECATEDIN_3_0 void EC_KEY_clear_flags(EC_KEY *key, int flags);
994
995OSSL_DEPRECATEDIN_3_0 int EC_KEY_decoded_from_explicit_params(const EC_KEY *key);
996
997/**
998 * Creates a new EC_KEY object using a named curve as underlying
999 * EC_GROUP object.
1000 * \param ctx The library context for to use for this EC_KEY. May be NULL in
1001 * which case the default library context is used.
1002 * \param propq Any property query string
1003 * \param nid NID of the named curve.
1004 * \return EC_KEY object or NULL if an error occurred.
1005 */
1006OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_new_by_curve_name_ex(OSSL_LIB_CTX *ctx,
1007 const char *propq,
1008 int nid);
1009
1010/**
1011 * Creates a new EC_KEY object using a named curve as underlying
1012 * EC_GROUP object. Same as calling EC_KEY_new_by_curve_name_ex with a NULL
1013 * library context and property query string.
1014 * \param nid NID of the named curve.
1015 * \return EC_KEY object or NULL if an error occurred.
1016 */
1017OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_new_by_curve_name(int nid);
1018
1019/** Frees a EC_KEY object.
1020 * \param key EC_KEY object to be freed.
1021 */
1022OSSL_DEPRECATEDIN_3_0 void EC_KEY_free(EC_KEY *key);
1023
1024/** Copies a EC_KEY object.
1025 * \param dst destination EC_KEY object
1026 * \param src src EC_KEY object
1027 * \return dst or NULL if an error occurred.
1028 */
1029OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_copy(EC_KEY *dst, const EC_KEY *src);
1030
1031/** Creates a new EC_KEY object and copies the content from src to it.
1032 * \param src the source EC_KEY object
1033 * \return newly created EC_KEY object or NULL if an error occurred.
1034 */
1035OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_dup(const EC_KEY *src);
1036
1037/** Increases the internal reference count of a EC_KEY object.
1038 * \param key EC_KEY object
1039 * \return 1 on success and 0 if an error occurred.
1040 */
1041OSSL_DEPRECATEDIN_3_0 int EC_KEY_up_ref(EC_KEY *key);
1042
1043/** Returns the ENGINE object of a EC_KEY object
1044 * \param eckey EC_KEY object
1045 * \return the ENGINE object (possibly NULL).
1046 */
1047OSSL_DEPRECATEDIN_3_0 ENGINE *EC_KEY_get0_engine(const EC_KEY *eckey);
1048
1049/** Returns the EC_GROUP object of a EC_KEY object
1050 * \param key EC_KEY object
1051 * \return the EC_GROUP object (possibly NULL).
1052 */
1053OSSL_DEPRECATEDIN_3_0 const EC_GROUP *EC_KEY_get0_group(const EC_KEY *key);
1054
1055/** Sets the EC_GROUP of a EC_KEY object.
1056 * \param key EC_KEY object
1057 * \param group EC_GROUP to use in the EC_KEY object (note: the EC_KEY
1058 * object will use an own copy of the EC_GROUP).
1059 * \return 1 on success and 0 if an error occurred.
1060 */
1061OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_group(EC_KEY *key, const EC_GROUP *group);
1062
1063/** Returns the private key of a EC_KEY object.
1064 * \param key EC_KEY object
1065 * \return a BIGNUM with the private key (possibly NULL).
1066 */
1067OSSL_DEPRECATEDIN_3_0 const BIGNUM *EC_KEY_get0_private_key(const EC_KEY *key);
1068
1069/** Sets the private key of a EC_KEY object.
1070 * \param key EC_KEY object
1071 * \param prv BIGNUM with the private key (note: the EC_KEY object
1072 * will use an own copy of the BIGNUM).
1073 * \return 1 on success and 0 if an error occurred.
1074 */
1075OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *prv);
1076
1077/** Returns the public key of a EC_KEY object.
1078 * \param key the EC_KEY object
1079 * \return a EC_POINT object with the public key (possibly NULL)
1080 */
1081OSSL_DEPRECATEDIN_3_0 const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *key);
1082
1083/** Sets the public key of a EC_KEY object.
1084 * \param key EC_KEY object
1085 * \param pub EC_POINT object with the public key (note: the EC_KEY object
1086 * will use an own copy of the EC_POINT object).
1087 * \return 1 on success and 0 if an error occurred.
1088 */
1089OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub);
1090
1091OSSL_DEPRECATEDIN_3_0 unsigned EC_KEY_get_enc_flags(const EC_KEY *key);
1092OSSL_DEPRECATEDIN_3_0 void EC_KEY_set_enc_flags(EC_KEY *eckey, unsigned int flags);
1093OSSL_DEPRECATEDIN_3_0 point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key);
1094OSSL_DEPRECATEDIN_3_0 void EC_KEY_set_conv_form(EC_KEY *eckey,
1095 point_conversion_form_t cform);
1096# endif /*OPENSSL_NO_DEPRECATED_3_0 */
1097
1098# define EC_KEY_get_ex_new_index(l, p, newf, dupf, freef) \
1099 CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_EC_KEY, l, p, newf, dupf, freef)
1100
1101# ifndef OPENSSL_NO_DEPRECATED_3_0
1102OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_ex_data(EC_KEY *key, int idx, void *arg);
1103OSSL_DEPRECATEDIN_3_0 void *EC_KEY_get_ex_data(const EC_KEY *key, int idx);
1104
1105/* wrapper functions for the underlying EC_GROUP object */
1106OSSL_DEPRECATEDIN_3_0 void EC_KEY_set_asn1_flag(EC_KEY *eckey, int asn1_flag);
1107
1108/** Creates a table of pre-computed multiples of the generator to
1109 * accelerate further EC_KEY operations.
1110 * \param key EC_KEY object
1111 * \param ctx BN_CTX object (optional)
1112 * \return 1 on success and 0 if an error occurred.
1113 */
1114OSSL_DEPRECATEDIN_3_0 int EC_KEY_precompute_mult(EC_KEY *key, BN_CTX *ctx);
1115
1116/** Creates a new ec private (and optional a new public) key.
1117 * \param key EC_KEY object
1118 * \return 1 on success and 0 if an error occurred.
1119 */
1120OSSL_DEPRECATEDIN_3_0 int EC_KEY_generate_key(EC_KEY *key);
1121
1122/** Verifies that a private and/or public key is valid.
1123 * \param key the EC_KEY object
1124 * \return 1 on success and 0 otherwise.
1125 */
1126OSSL_DEPRECATEDIN_3_0 int EC_KEY_check_key(const EC_KEY *key);
1127
1128/** Indicates if an EC_KEY can be used for signing.
1129 * \param eckey the EC_KEY object
1130 * \return 1 if can sign and 0 otherwise.
1131 */
1132OSSL_DEPRECATEDIN_3_0 int EC_KEY_can_sign(const EC_KEY *eckey);
1133
1134/** Sets a public key from affine coordinates performing
1135 * necessary NIST PKV tests.
1136 * \param key the EC_KEY object
1137 * \param x public key x coordinate
1138 * \param y public key y coordinate
1139 * \return 1 on success and 0 otherwise.
1140 */
1141OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_public_key_affine_coordinates(EC_KEY *key,
1142 BIGNUM *x,
1143 BIGNUM *y);
1144
1145/** Encodes an EC_KEY public key to an allocated octet string
1146 * \param key key to encode
1147 * \param form point conversion form
1148 * \param pbuf returns pointer to allocated buffer
1149 * \param ctx BN_CTX object (optional)
1150 * \return the length of the encoded octet string or 0 if an error occurred
1151 */
1152OSSL_DEPRECATEDIN_3_0 size_t EC_KEY_key2buf(const EC_KEY *key,
1153 point_conversion_form_t form,
1154 unsigned char **pbuf, BN_CTX *ctx);
1155
1156/** Decodes a EC_KEY public key from a octet string
1157 * \param key key to decode
1158 * \param buf memory buffer with the encoded ec point
1159 * \param len length of the encoded ec point
1160 * \param ctx BN_CTX object (optional)
1161 * \return 1 on success and 0 if an error occurred
1162 */
1163
1164OSSL_DEPRECATEDIN_3_0 int EC_KEY_oct2key(EC_KEY *key, const unsigned char *buf,
1165 size_t len, BN_CTX *ctx);
1166
1167/** Decodes an EC_KEY private key from an octet string
1168 * \param key key to decode
1169 * \param buf memory buffer with the encoded private key
1170 * \param len length of the encoded key
1171 * \return 1 on success and 0 if an error occurred
1172 */
1173
1174OSSL_DEPRECATEDIN_3_0 int EC_KEY_oct2priv(EC_KEY *key, const unsigned char *buf,
1175 size_t len);
1176
1177/** Encodes a EC_KEY private key to an octet string
1178 * \param key key to encode
1179 * \param buf memory buffer for the result. If NULL the function returns
1180 * required buffer size.
1181 * \param len length of the memory buffer
1182 * \return the length of the encoded octet string or 0 if an error occurred
1183 */
1184
1185OSSL_DEPRECATEDIN_3_0 size_t EC_KEY_priv2oct(const EC_KEY *key,
1186 unsigned char *buf, size_t len);
1187
1188/** Encodes an EC_KEY private key to an allocated octet string
1189 * \param eckey key to encode
1190 * \param pbuf returns pointer to allocated buffer
1191 * \return the length of the encoded octet string or 0 if an error occurred
1192 */
1193OSSL_DEPRECATEDIN_3_0 size_t EC_KEY_priv2buf(const EC_KEY *eckey,
1194 unsigned char **pbuf);
1195
1196/********************************************************************/
1197/* de- and encoding functions for SEC1 ECPrivateKey */
1198/********************************************************************/
1199
1200/** Decodes a private key from a memory buffer.
1201 * \param key a pointer to a EC_KEY object which should be used (or NULL)
1202 * \param in pointer to memory with the DER encoded private key
1203 * \param len length of the DER encoded private key
1204 * \return the decoded private key or NULL if an error occurred.
1205 */
1206OSSL_DEPRECATEDIN_3_0 EC_KEY *d2i_ECPrivateKey(EC_KEY **key,
1207 const unsigned char **in,
1208 long len);
1209
1210/** Encodes a private key object and stores the result in a buffer.
1211 * \param key the EC_KEY object to encode
1212 * \param out the buffer for the result (if NULL the function returns number
1213 * of bytes needed).
1214 * \return 1 on success and 0 if an error occurred.
1215 */
1216OSSL_DEPRECATEDIN_3_0 int i2d_ECPrivateKey(const EC_KEY *key,
1217 unsigned char **out);
1218
1219/********************************************************************/
1220/* de- and encoding functions for EC parameters */
1221/********************************************************************/
1222
1223/** Decodes ec parameter from a memory buffer.
1224 * \param key a pointer to a EC_KEY object which should be used (or NULL)
1225 * \param in pointer to memory with the DER encoded ec parameters
1226 * \param len length of the DER encoded ec parameters
1227 * \return a EC_KEY object with the decoded parameters or NULL if an error
1228 * occurred.
1229 */
1230OSSL_DEPRECATEDIN_3_0 EC_KEY *d2i_ECParameters(EC_KEY **key,
1231 const unsigned char **in,
1232 long len);
1233
1234/** Encodes ec parameter and stores the result in a buffer.
1235 * \param key the EC_KEY object with ec parameters to encode
1236 * \param out the buffer for the result (if NULL the function returns number
1237 * of bytes needed).
1238 * \return 1 on success and 0 if an error occurred.
1239 */
1240OSSL_DEPRECATEDIN_3_0 int i2d_ECParameters(const EC_KEY *key,
1241 unsigned char **out);
1242
1243/********************************************************************/
1244/* de- and encoding functions for EC public key */
1245/* (octet string, not DER -- hence 'o2i' and 'i2o') */
1246/********************************************************************/
1247
1248/** Decodes an ec public key from a octet string.
1249 * \param key a pointer to a EC_KEY object which should be used
1250 * \param in memory buffer with the encoded public key
1251 * \param len length of the encoded public key
1252 * \return EC_KEY object with decoded public key or NULL if an error
1253 * occurred.
1254 */
1255OSSL_DEPRECATEDIN_3_0 EC_KEY *o2i_ECPublicKey(EC_KEY **key,
1256 const unsigned char **in, long len);
1257
1258/** Encodes an ec public key in an octet string.
1259 * \param key the EC_KEY object with the public key
1260 * \param out the buffer for the result (if NULL the function returns number
1261 * of bytes needed).
1262 * \return 1 on success and 0 if an error occurred
1263 */
1264OSSL_DEPRECATEDIN_3_0 int i2o_ECPublicKey(const EC_KEY *key, unsigned char **out);
1265
1266/** Prints out the ec parameters on human readable form.
1267 * \param bp BIO object to which the information is printed
1268 * \param key EC_KEY object
1269 * \return 1 on success and 0 if an error occurred
1270 */
1271OSSL_DEPRECATEDIN_3_0 int ECParameters_print(BIO *bp, const EC_KEY *key);
1272
1273/** Prints out the contents of a EC_KEY object
1274 * \param bp BIO object to which the information is printed
1275 * \param key EC_KEY object
1276 * \param off line offset
1277 * \return 1 on success and 0 if an error occurred
1278 */
1279OSSL_DEPRECATEDIN_3_0 int EC_KEY_print(BIO *bp, const EC_KEY *key, int off);
1280
1281# ifndef OPENSSL_NO_STDIO
1282/** Prints out the ec parameters on human readable form.
1283 * \param fp file descriptor to which the information is printed
1284 * \param key EC_KEY object
1285 * \return 1 on success and 0 if an error occurred
1286 */
1287OSSL_DEPRECATEDIN_3_0 int ECParameters_print_fp(FILE *fp, const EC_KEY *key);
1288
1289/** Prints out the contents of a EC_KEY object
1290 * \param fp file descriptor to which the information is printed
1291 * \param key EC_KEY object
1292 * \param off line offset
1293 * \return 1 on success and 0 if an error occurred
1294 */
1295OSSL_DEPRECATEDIN_3_0 int EC_KEY_print_fp(FILE *fp, const EC_KEY *key, int off);
1296# endif /* OPENSSL_NO_STDIO */
1297
1298OSSL_DEPRECATEDIN_3_0 const EC_KEY_METHOD *EC_KEY_OpenSSL(void);
1299OSSL_DEPRECATEDIN_3_0 const EC_KEY_METHOD *EC_KEY_get_default_method(void);
1300OSSL_DEPRECATEDIN_3_0 void EC_KEY_set_default_method(const EC_KEY_METHOD *meth);
1301OSSL_DEPRECATEDIN_3_0 const EC_KEY_METHOD *EC_KEY_get_method(const EC_KEY *key);
1302OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_method(EC_KEY *key, const EC_KEY_METHOD *meth);
1303OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_new_method(ENGINE *engine);
1304
1305/** The old name for ecdh_KDF_X9_63
1306 * The ECDH KDF specification has been mistakenly attributed to ANSI X9.62,
1307 * it is actually specified in ANSI X9.63.
1308 * This identifier is retained for backwards compatibility
1309 */
1310OSSL_DEPRECATEDIN_3_0 int ECDH_KDF_X9_62(unsigned char *out, size_t outlen,
1311 const unsigned char *Z, size_t Zlen,
1312 const unsigned char *sinfo,
1313 size_t sinfolen, const EVP_MD *md);
1314
1315OSSL_DEPRECATEDIN_3_0 int ECDH_compute_key(void *out, size_t outlen,
1316 const EC_POINT *pub_key,
1317 const EC_KEY *ecdh,
1318 void *(*KDF)(const void *in,
1319 size_t inlen, void *out,
1320 size_t *outlen));
1321# endif /* OPENSSL_NO_DEPRECATED_3_0 */
1322
1323typedef struct ECDSA_SIG_st ECDSA_SIG;
1324
1325/** Allocates and initialize a ECDSA_SIG structure
1326 * \return pointer to a ECDSA_SIG structure or NULL if an error occurred
1327 */
1328ECDSA_SIG *ECDSA_SIG_new(void);
1329
1330/** frees a ECDSA_SIG structure
1331 * \param sig pointer to the ECDSA_SIG structure
1332 */
1333void ECDSA_SIG_free(ECDSA_SIG *sig);
1334
1335/** i2d_ECDSA_SIG encodes content of ECDSA_SIG (note: this function modifies *pp
1336 * (*pp += length of the DER encoded signature)).
1337 * \param sig pointer to the ECDSA_SIG object
1338 * \param pp pointer to a unsigned char pointer for the output or NULL
1339 * \return the length of the DER encoded ECDSA_SIG object or a negative value
1340 * on error
1341 */
1342DECLARE_ASN1_ENCODE_FUNCTIONS_only(ECDSA_SIG, ECDSA_SIG)
1343
1344/** d2i_ECDSA_SIG decodes an ECDSA signature (note: this function modifies *pp
1345 * (*pp += len)).
1346 * \param sig pointer to ECDSA_SIG pointer (may be NULL)
1347 * \param pp memory buffer with the DER encoded signature
1348 * \param len length of the buffer
1349 * \return pointer to the decoded ECDSA_SIG structure (or NULL)
1350 */
1351
1352/** Accessor for r and s fields of ECDSA_SIG
1353 * \param sig pointer to ECDSA_SIG structure
1354 * \param pr pointer to BIGNUM pointer for r (may be NULL)
1355 * \param ps pointer to BIGNUM pointer for s (may be NULL)
1356 */
1357void ECDSA_SIG_get0(const ECDSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps);
1358
1359/** Accessor for r field of ECDSA_SIG
1360 * \param sig pointer to ECDSA_SIG structure
1361 */
1362const BIGNUM *ECDSA_SIG_get0_r(const ECDSA_SIG *sig);
1363
1364/** Accessor for s field of ECDSA_SIG
1365 * \param sig pointer to ECDSA_SIG structure
1366 */
1367const BIGNUM *ECDSA_SIG_get0_s(const ECDSA_SIG *sig);
1368
1369/** Setter for r and s fields of ECDSA_SIG
1370 * \param sig pointer to ECDSA_SIG structure
1371 * \param r pointer to BIGNUM for r
1372 * \param s pointer to BIGNUM for s
1373 */
1374int ECDSA_SIG_set0(ECDSA_SIG *sig, BIGNUM *r, BIGNUM *s);
1375
1376# ifndef OPENSSL_NO_DEPRECATED_3_0
1377/** Computes the ECDSA signature of the given hash value using
1378 * the supplied private key and returns the created signature.
1379 * \param dgst pointer to the hash value
1380 * \param dgst_len length of the hash value
1381 * \param eckey EC_KEY object containing a private EC key
1382 * \return pointer to a ECDSA_SIG structure or NULL if an error occurred
1383 */
1384OSSL_DEPRECATEDIN_3_0 ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst,
1385 int dgst_len, EC_KEY *eckey);
1386
1387/** Computes ECDSA signature of a given hash value using the supplied
1388 * private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
1389 * \param dgst pointer to the hash value to sign
1390 * \param dgstlen length of the hash value
1391 * \param kinv BIGNUM with a pre-computed inverse k (optional)
1392 * \param rp BIGNUM with a pre-computed rp value (optional),
1393 * see ECDSA_sign_setup
1394 * \param eckey EC_KEY object containing a private EC key
1395 * \return pointer to a ECDSA_SIG structure or NULL if an error occurred
1396 */
1397OSSL_DEPRECATEDIN_3_0 ECDSA_SIG *ECDSA_do_sign_ex(const unsigned char *dgst,
1398 int dgstlen, const BIGNUM *kinv,
1399 const BIGNUM *rp, EC_KEY *eckey);
1400
1401/** Verifies that the supplied signature is a valid ECDSA
1402 * signature of the supplied hash value using the supplied public key.
1403 * \param dgst pointer to the hash value
1404 * \param dgst_len length of the hash value
1405 * \param sig ECDSA_SIG structure
1406 * \param eckey EC_KEY object containing a public EC key
1407 * \return 1 if the signature is valid, 0 if the signature is invalid
1408 * and -1 on error
1409 */
1410OSSL_DEPRECATEDIN_3_0 int ECDSA_do_verify(const unsigned char *dgst, int dgst_len,
1411 const ECDSA_SIG *sig, EC_KEY *eckey);
1412
1413/** Precompute parts of the signing operation
1414 * \param eckey EC_KEY object containing a private EC key
1415 * \param ctx BN_CTX object (optional)
1416 * \param kinv BIGNUM pointer for the inverse of k
1417 * \param rp BIGNUM pointer for x coordinate of k * generator
1418 * \return 1 on success and 0 otherwise
1419 */
1420OSSL_DEPRECATEDIN_3_0 int ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx,
1421 BIGNUM **kinv, BIGNUM **rp);
1422
1423/** Computes ECDSA signature of a given hash value using the supplied
1424 * private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
1425 * \param type this parameter is ignored
1426 * \param dgst pointer to the hash value to sign
1427 * \param dgstlen length of the hash value
1428 * \param sig memory for the DER encoded created signature
1429 * \param siglen pointer to the length of the returned signature
1430 * \param eckey EC_KEY object containing a private EC key
1431 * \return 1 on success and 0 otherwise
1432 */
1433OSSL_DEPRECATEDIN_3_0 int ECDSA_sign(int type, const unsigned char *dgst,
1434 int dgstlen, unsigned char *sig,
1435 unsigned int *siglen, EC_KEY *eckey);
1436
1437/** Computes ECDSA signature of a given hash value using the supplied
1438 * private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
1439 * \param type this parameter is ignored
1440 * \param dgst pointer to the hash value to sign
1441 * \param dgstlen length of the hash value
1442 * \param sig buffer to hold the DER encoded signature
1443 * \param siglen pointer to the length of the returned signature
1444 * \param kinv BIGNUM with a pre-computed inverse k (optional)
1445 * \param rp BIGNUM with a pre-computed rp value (optional),
1446 * see ECDSA_sign_setup
1447 * \param eckey EC_KEY object containing a private EC key
1448 * \return 1 on success and 0 otherwise
1449 */
1450OSSL_DEPRECATEDIN_3_0 int ECDSA_sign_ex(int type, const unsigned char *dgst,
1451 int dgstlen, unsigned char *sig,
1452 unsigned int *siglen, const BIGNUM *kinv,
1453 const BIGNUM *rp, EC_KEY *eckey);
1454
1455/** Verifies that the given signature is valid ECDSA signature
1456 * of the supplied hash value using the specified public key.
1457 * \param type this parameter is ignored
1458 * \param dgst pointer to the hash value
1459 * \param dgstlen length of the hash value
1460 * \param sig pointer to the DER encoded signature
1461 * \param siglen length of the DER encoded signature
1462 * \param eckey EC_KEY object containing a public EC key
1463 * \return 1 if the signature is valid, 0 if the signature is invalid
1464 * and -1 on error
1465 */
1466OSSL_DEPRECATEDIN_3_0 int ECDSA_verify(int type, const unsigned char *dgst,
1467 int dgstlen, const unsigned char *sig,
1468 int siglen, EC_KEY *eckey);
1469
1470/** Returns the maximum length of the DER encoded signature
1471 * \param eckey EC_KEY object
1472 * \return numbers of bytes required for the DER encoded signature
1473 */
1474OSSL_DEPRECATEDIN_3_0 int ECDSA_size(const EC_KEY *eckey);
1475
1476/********************************************************************/
1477/* EC_KEY_METHOD constructors, destructors, writers and accessors */
1478/********************************************************************/
1479
1480OSSL_DEPRECATEDIN_3_0 EC_KEY_METHOD *EC_KEY_METHOD_new(const EC_KEY_METHOD *meth);
1481OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_free(EC_KEY_METHOD *meth);
1482OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_set_init
1483 (EC_KEY_METHOD *meth,
1484 int (*init)(EC_KEY *key),
1485 void (*finish)(EC_KEY *key),
1486 int (*copy)(EC_KEY *dest, const EC_KEY *src),
1487 int (*set_group)(EC_KEY *key, const EC_GROUP *grp),
1488 int (*set_private)(EC_KEY *key, const BIGNUM *priv_key),
1489 int (*set_public)(EC_KEY *key, const EC_POINT *pub_key));
1490
1491OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_set_keygen(EC_KEY_METHOD *meth,
1492 int (*keygen)(EC_KEY *key));
1493
1494OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_set_compute_key
1495 (EC_KEY_METHOD *meth,
1496 int (*ckey)(unsigned char **psec, size_t *pseclen,
1497 const EC_POINT *pub_key, const EC_KEY *ecdh));
1498
1499OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_set_sign
1500 (EC_KEY_METHOD *meth,
1501 int (*sign)(int type, const unsigned char *dgst,
1502 int dlen, unsigned char *sig,
1503 unsigned int *siglen,
1504 const BIGNUM *kinv, const BIGNUM *r,
1505 EC_KEY *eckey),
1506 int (*sign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
1507 BIGNUM **kinvp, BIGNUM **rp),
1508 ECDSA_SIG *(*sign_sig)(const unsigned char *dgst,
1509 int dgst_len,
1510 const BIGNUM *in_kinv,
1511 const BIGNUM *in_r,
1512 EC_KEY *eckey));
1513
1514OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_set_verify
1515 (EC_KEY_METHOD *meth,
1516 int (*verify)(int type, const unsigned
1517 char *dgst, int dgst_len,
1518 const unsigned char *sigbuf,
1519 int sig_len, EC_KEY *eckey),
1520 int (*verify_sig)(const unsigned char *dgst,
1521 int dgst_len, const ECDSA_SIG *sig,
1522 EC_KEY *eckey));
1523
1524OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_get_init
1525 (const EC_KEY_METHOD *meth,
1526 int (**pinit)(EC_KEY *key),
1527 void (**pfinish)(EC_KEY *key),
1528 int (**pcopy)(EC_KEY *dest, const EC_KEY *src),
1529 int (**pset_group)(EC_KEY *key, const EC_GROUP *grp),
1530 int (**pset_private)(EC_KEY *key, const BIGNUM *priv_key),
1531 int (**pset_public)(EC_KEY *key, const EC_POINT *pub_key));
1532
1533OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_get_keygen
1534 (const EC_KEY_METHOD *meth, int (**pkeygen)(EC_KEY *key));
1535
1536OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_get_compute_key
1537 (const EC_KEY_METHOD *meth,
1538 int (**pck)(unsigned char **psec,
1539 size_t *pseclen,
1540 const EC_POINT *pub_key,
1541 const EC_KEY *ecdh));
1542
1543OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_get_sign
1544 (const EC_KEY_METHOD *meth,
1545 int (**psign)(int type, const unsigned char *dgst,
1546 int dlen, unsigned char *sig,
1547 unsigned int *siglen,
1548 const BIGNUM *kinv, const BIGNUM *r,
1549 EC_KEY *eckey),
1550 int (**psign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
1551 BIGNUM **kinvp, BIGNUM **rp),
1552 ECDSA_SIG *(**psign_sig)(const unsigned char *dgst,
1553 int dgst_len,
1554 const BIGNUM *in_kinv,
1555 const BIGNUM *in_r,
1556 EC_KEY *eckey));
1557
1558OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_get_verify
1559 (const EC_KEY_METHOD *meth,
1560 int (**pverify)(int type, const unsigned
1561 char *dgst, int dgst_len,
1562 const unsigned char *sigbuf,
1563 int sig_len, EC_KEY *eckey),
1564 int (**pverify_sig)(const unsigned char *dgst,
1565 int dgst_len,
1566 const ECDSA_SIG *sig,
1567 EC_KEY *eckey));
1568# endif /* OPENSSL_NO_DEPRECATED_3_0 */
1569
1570# define EVP_EC_gen(curve) \
1571 EVP_PKEY_Q_keygen(NULL, NULL, "EC", (char *)(strstr(curve, "")))
1572 /* strstr is used to enable type checking for the variadic string arg */
1573# define ECParameters_dup(x) ASN1_dup_of(EC_KEY, i2d_ECParameters, \
1574 d2i_ECParameters, x)
1575
1576# ifndef __cplusplus
1577# if defined(__SUNPRO_C)
1578# if __SUNPRO_C >= 0x520
1579# pragma error_messages (default,E_ARRAY_OF_INCOMPLETE_NONAME,E_ARRAY_OF_INCOMPLETE)
1580# endif
1581# endif
1582# endif
1583
1584# endif
1585# ifdef __cplusplus
1586}
1587# endif
1588#endif
1589