2 * Copyright 2002-2022 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
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
15 # include <openssl/macros.h>
16 # ifndef OPENSSL_NO_DEPRECATED_3_0
20 # include <openssl/opensslconf.h>
21 # include <openssl/types.h>
29 /* Values for EVP_PKEY_CTX_set_ec_param_enc() */
30 # define OPENSSL_EC_EXPLICIT_CURVE 0x000
31 # define OPENSSL_EC_NAMED_CURVE 0x001
33 int EVP_PKEY_CTX_set_ec_paramgen_curve_nid(EVP_PKEY_CTX *ctx, int nid);
34 int EVP_PKEY_CTX_set_ec_param_enc(EVP_PKEY_CTX *ctx, int param_enc);
35 int EVP_PKEY_CTX_set_ecdh_cofactor_mode(EVP_PKEY_CTX *ctx, int cofactor_mode);
36 int EVP_PKEY_CTX_get_ecdh_cofactor_mode(EVP_PKEY_CTX *ctx);
38 int EVP_PKEY_CTX_set_ecdh_kdf_type(EVP_PKEY_CTX *ctx, int kdf);
39 int EVP_PKEY_CTX_get_ecdh_kdf_type(EVP_PKEY_CTX *ctx);
41 int EVP_PKEY_CTX_set_ecdh_kdf_md(EVP_PKEY_CTX *ctx, const EVP_MD *md);
42 int EVP_PKEY_CTX_get_ecdh_kdf_md(EVP_PKEY_CTX *ctx, const EVP_MD **md);
44 int EVP_PKEY_CTX_set_ecdh_kdf_outlen(EVP_PKEY_CTX *ctx, int len);
45 int EVP_PKEY_CTX_get_ecdh_kdf_outlen(EVP_PKEY_CTX *ctx, int *len);
47 int EVP_PKEY_CTX_set0_ecdh_kdf_ukm(EVP_PKEY_CTX *ctx, unsigned char *ukm,
49 # ifndef OPENSSL_NO_DEPRECATED_3_0
51 int EVP_PKEY_CTX_get0_ecdh_kdf_ukm(EVP_PKEY_CTX *ctx, unsigned char **ukm);
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)
66 # define EVP_PKEY_ECDH_KDF_NONE 1
67 # define EVP_PKEY_ECDH_KDF_X9_63 2
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
74 # define EVP_PKEY_ECDH_KDF_X9_62 EVP_PKEY_ECDH_KDF_X9_63
76 /** Enum for the point conversion form as defined in X9.62 (ECDSA)
77 * for the encoding of a elliptic curve point (x,y) */
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;
89 const char *OSSL_EC_curve_nid2name(int nid);
91 # ifndef OPENSSL_NO_STDIO
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>
100 # include <openssl/ecerr.h>
102 # ifndef OPENSSL_ECC_MAX_FIELD_BITS
103 # define OPENSSL_ECC_MAX_FIELD_BITS 661
106 # include <openssl/params.h>
107 # ifndef OPENSSL_NO_DEPRECATED_3_0
108 typedef struct ec_method_st EC_METHOD;
110 typedef struct ec_group_st EC_GROUP;
111 typedef struct ec_point_st EC_POINT;
112 typedef struct ecpk_parameters_st ECPKPARAMETERS;
113 typedef struct ec_parameters_st ECPARAMETERS;
115 /********************************************************************/
116 /* EC_METHODs for curves over GF(p) */
117 /********************************************************************/
119 # ifndef OPENSSL_NO_DEPRECATED_3_0
120 /** Returns the basic GFp ec methods which provides the basis for the
122 * \return EC_METHOD object
124 OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_simple_method(void);
126 /** Returns GFp methods using montgomery multiplication.
127 * \return EC_METHOD object
129 OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_mont_method(void);
131 /** Returns GFp methods using optimized methods for NIST recommended curves
132 * \return EC_METHOD object
134 OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_nist_method(void);
136 # ifndef OPENSSL_NO_EC_NISTP_64_GCC_128
137 /** Returns 64-bit optimized methods for nistp224
138 * \return EC_METHOD object
140 OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_nistp224_method(void);
142 /** Returns 64-bit optimized methods for nistp256
143 * \return EC_METHOD object
145 OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_nistp256_method(void);
147 /** Returns 64-bit optimized methods for nistp521
148 * \return EC_METHOD object
150 OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_nistp521_method(void);
151 # endif /* OPENSSL_NO_EC_NISTP_64_GCC_128 */
153 # ifndef OPENSSL_NO_EC2M
154 /********************************************************************/
155 /* EC_METHOD for curves over GF(2^m) */
156 /********************************************************************/
158 /** Returns the basic GF2m ec method
159 * \return EC_METHOD object
161 OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GF2m_simple_method(void);
165 /********************************************************************/
166 /* EC_GROUP functions */
167 /********************************************************************/
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.
174 OSSL_DEPRECATEDIN_3_0 EC_GROUP *EC_GROUP_new(const EC_METHOD *meth);
176 /** Clears and frees a EC_GROUP object
177 * \param group EC_GROUP object to be cleared and freed.
179 OSSL_DEPRECATEDIN_3_0 void EC_GROUP_clear_free(EC_GROUP *group);
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.
185 OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group);
187 /** Returns the field type of the EC_METHOD.
188 * \param meth EC_METHOD object
189 * \return NID of the underlying field type OID.
191 OSSL_DEPRECATEDIN_3_0 int EC_METHOD_get_field_type(const EC_METHOD *meth);
192 # endif /* OPENSSL_NO_DEPRECATED_3_0 */
194 /** Frees a EC_GROUP object
195 * \param group EC_GROUP object to be freed.
197 void EC_GROUP_free(EC_GROUP *group);
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.
204 int EC_GROUP_copy(EC_GROUP *dst, const EC_GROUP *src);
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.
211 EC_GROUP *EC_GROUP_dup(const EC_GROUP *src);
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
221 int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator,
222 const BIGNUM *order, const BIGNUM *cofactor);
224 /** Returns the generator of a EC_GROUP object.
225 * \param group EC_GROUP object
226 * \return the currently used generator (possibly NULL).
228 const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group);
230 /** Returns the montgomery data for order(Generator)
231 * \param group EC_GROUP object
232 * \return the currently used montgomery data (possibly NULL).
234 BN_MONT_CTX *EC_GROUP_get_mont_data(const EC_GROUP *group);
236 /** Gets the order of a EC_GROUP
237 * \param group EC_GROUP object
238 * \param order BIGNUM to which the order is copied
240 * \return 1 on success and 0 if an error occurred
242 int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx);
244 /** Gets the order of an EC_GROUP
245 * \param group EC_GROUP object
246 * \return the group order
248 const BIGNUM *EC_GROUP_get0_order(const EC_GROUP *group);
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.
254 int EC_GROUP_order_bits(const EC_GROUP *group);
256 /** Gets the cofactor of a EC_GROUP
257 * \param group EC_GROUP object
258 * \param cofactor BIGNUM to which the cofactor is copied
260 * \return 1 on success and 0 if an error occurred
262 int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor,
265 /** Gets the cofactor of an EC_GROUP
266 * \param group EC_GROUP object
267 * \return the group cofactor
269 const BIGNUM *EC_GROUP_get0_cofactor(const EC_GROUP *group);
271 /** Sets the name of a EC_GROUP object
272 * \param group EC_GROUP object
273 * \param nid NID of the curve name OID
275 void EC_GROUP_set_curve_name(EC_GROUP *group, int nid);
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.
281 int EC_GROUP_get_curve_name(const EC_GROUP *group);
283 /** Gets the field of an EC_GROUP
284 * \param group EC_GROUP object
285 * \return the group field
287 const BIGNUM *EC_GROUP_get0_field(const EC_GROUP *group);
289 /** Returns the field type of the EC_GROUP.
290 * \param group EC_GROUP object
291 * \return NID of the underlying field type OID.
293 int EC_GROUP_get_field_type(const EC_GROUP *group);
295 void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag);
296 int EC_GROUP_get_asn1_flag(const EC_GROUP *group);
298 void EC_GROUP_set_point_conversion_form(EC_GROUP *group,
299 point_conversion_form_t form);
300 point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP *);
302 unsigned char *EC_GROUP_get0_seed(const EC_GROUP *x);
303 size_t EC_GROUP_get_seed_len(const EC_GROUP *);
304 size_t EC_GROUP_set_seed(EC_GROUP *, const unsigned char *, size_t len);
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
316 int EC_GROUP_set_curve(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a,
317 const BIGNUM *b, BN_CTX *ctx);
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
329 int EC_GROUP_get_curve(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b,
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
342 OSSL_DEPRECATEDIN_3_0 int EC_GROUP_set_curve_GFp(EC_GROUP *group,
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
357 OSSL_DEPRECATEDIN_3_0 int EC_GROUP_get_curve_GFp(const EC_GROUP *group,
359 BIGNUM *a, BIGNUM *b,
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
372 OSSL_DEPRECATEDIN_3_0 int EC_GROUP_set_curve_GF2m(EC_GROUP *group,
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
387 OSSL_DEPRECATEDIN_3_0 int EC_GROUP_get_curve_GF2m(const EC_GROUP *group,
389 BIGNUM *a, BIGNUM *b,
391 # endif /* OPENSSL_NO_EC2M */
392 # endif /* OPENSSL_NO_DEPRECATED_3_0 */
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
398 int EC_GROUP_get_degree(const EC_GROUP *group);
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
405 int EC_GROUP_check(const EC_GROUP *group, BN_CTX *ctx);
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
412 int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx);
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
420 int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx);
423 * EC_GROUP_new_GF*() calls EC_GROUP_new() and EC_GROUP_set_GF*() after
424 * choosing an appropriate EC_METHOD
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
435 EC_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
446 EC_GROUP *EC_GROUP_new_curve_GF2m(const BIGNUM *p, const BIGNUM *a,
447 const BIGNUM *b, BN_CTX *ctx);
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
456 * \param propq A property query string
457 * \return newly created EC_GROUP object with specified parameters or NULL
458 * if an error occurred
460 EC_GROUP *EC_GROUP_new_from_params(const OSSL_PARAM params[],
461 OSSL_LIB_CTX *libctx, const char *propq);
464 * Creates an OSSL_PARAM array with the parameters describing the given
466 * The resulting parameters may contain an explicit or a named curve depending
468 * \param group pointer to the EC_GROUP object
469 * \param libctx The associated library context or NULL for the default
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
476 OSSL_PARAM *EC_GROUP_to_params(const EC_GROUP *group, OSSL_LIB_CTX *libctx,
477 const char *propq, BN_CTX *bnctx);
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
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
488 EC_GROUP *EC_GROUP_new_by_curve_name_ex(OSSL_LIB_CTX *libctx, const char *propq,
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
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
499 EC_GROUP *EC_GROUP_new_by_curve_name(int nid);
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
506 EC_GROUP *EC_GROUP_new_from_ecparameters(const ECPARAMETERS *params);
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.
514 ECPARAMETERS *EC_GROUP_get_ecparameters(const EC_GROUP *group,
515 ECPARAMETERS *params);
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
522 EC_GROUP *EC_GROUP_new_from_ecpkparameters(const ECPKPARAMETERS *params);
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.
530 ECPKPARAMETERS *EC_GROUP_get_ecpkparameters(const EC_GROUP *group,
531 ECPKPARAMETERS *params);
533 /********************************************************************/
534 /* handling of internal curves */
535 /********************************************************************/
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
548 size_t EC_get_builtin_curves(EC_builtin_curve *r, size_t nitems);
550 const char *EC_curve_nid2nist(int nid);
551 int EC_curve_nist2nid(const char *name);
552 int EC_GROUP_check_named_curve(const EC_GROUP *group, int nist_only,
555 /********************************************************************/
556 /* EC_POINT functions */
557 /********************************************************************/
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
563 EC_POINT *EC_POINT_new(const EC_GROUP *group);
565 /** Frees a EC_POINT object
566 * \param point EC_POINT object to be freed
568 void EC_POINT_free(EC_POINT *point);
570 /** Clears and frees a EC_POINT object
571 * \param point EC_POINT object to be cleared and freed
573 void EC_POINT_clear_free(EC_POINT *point);
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
580 int EC_POINT_copy(EC_POINT *dst, const EC_POINT *src);
582 /** Creates a new EC_POINT object and copies the content of the supplied
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
588 EC_POINT *EC_POINT_dup(const EC_POINT *src, const EC_GROUP *group);
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
595 int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point);
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
602 OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_POINT_method_of(const EC_POINT *point);
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
613 OSSL_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,
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
627 OSSL_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 */
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
640 int EC_POINT_set_affine_coordinates(const EC_GROUP *group, EC_POINT *p,
641 const BIGNUM *x, const BIGNUM *y,
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
652 int EC_POINT_get_affine_coordinates(const EC_GROUP *group, const EC_POINT *p,
653 BIGNUM *x, BIGNUM *y, BN_CTX *ctx);
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
665 OSSL_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);
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
678 OSSL_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 */
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
691 int EC_POINT_set_compressed_coordinates(const EC_GROUP *group, EC_POINT *p,
692 const BIGNUM *x, int y_bit,
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
705 OSSL_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
718 OSSL_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);
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
731 OSSL_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);
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
744 OSSL_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);
748 # endif /* OPENSSL_NO_DEPRECATED_3_0 */
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
760 size_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);
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
772 int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *p,
773 const unsigned char *buf, size_t len, BN_CTX *ctx);
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
783 size_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);
787 /* other interfaces to point2oct/oct2point: */
788 # ifndef OPENSSL_NO_DEPRECATED_3_0
789 OSSL_DEPRECATEDIN_3_0 BIGNUM *EC_POINT_point2bn(const EC_GROUP *,
791 point_conversion_form_t form,
793 OSSL_DEPRECATEDIN_3_0 EC_POINT *EC_POINT_bn2point(const EC_GROUP *,
795 EC_POINT *, BN_CTX *);
796 # endif /* OPENSSL_NO_DEPRECATED_3_0 */
798 char *EC_POINT_point2hex(const EC_GROUP *, const EC_POINT *,
799 point_conversion_form_t form, BN_CTX *);
800 EC_POINT *EC_POINT_hex2point(const EC_GROUP *, const char *,
801 EC_POINT *, BN_CTX *);
803 /********************************************************************/
804 /* functions for doing EC_POINT arithmetic */
805 /********************************************************************/
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
815 int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a,
816 const EC_POINT *b, BN_CTX *ctx);
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
825 int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a,
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
834 int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx);
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
841 int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *p);
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
849 int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point,
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
859 int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b,
862 # ifndef OPENSSL_NO_DEPRECATED_3_0
863 OSSL_DEPRECATEDIN_3_0 int EC_POINT_make_affine(const EC_GROUP *group,
864 EC_POINT *point, BN_CTX *ctx);
865 OSSL_DEPRECATEDIN_3_0 int EC_POINTs_make_affine(const EC_GROUP *group, size_t num,
866 EC_POINT *points[], BN_CTX *ctx);
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
878 OSSL_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[],
882 # endif /* OPENSSL_NO_DEPRECATED_3_0 */
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
893 int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *n,
894 const EC_POINT *q, const BIGNUM *m, BN_CTX *ctx);
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
902 OSSL_DEPRECATEDIN_3_0 int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx);
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
908 OSSL_DEPRECATEDIN_3_0 int EC_GROUP_have_precompute_mult(const EC_GROUP *group);
909 # endif /* OPENSSL_NO_DEPRECATED_3_0 */
911 /********************************************************************/
913 /********************************************************************/
915 DECLARE_ASN1_ITEM(ECPKPARAMETERS)
916 DECLARE_ASN1_ALLOC_FUNCTIONS(ECPKPARAMETERS)
917 DECLARE_ASN1_ITEM(ECPARAMETERS)
918 DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
921 * EC_GROUP_get_basis_type() returns the NID of the basis type used to
922 * represent the field elements
924 int EC_GROUP_get_basis_type(const EC_GROUP *);
925 # ifndef OPENSSL_NO_EC2M
926 int EC_GROUP_get_trinomial_basis(const EC_GROUP *, unsigned int *k);
927 int EC_GROUP_get_pentanomial_basis(const EC_GROUP *, unsigned int *k1,
928 unsigned int *k2, unsigned int *k3);
931 EC_GROUP *d2i_ECPKParameters(EC_GROUP **, const unsigned char **in, long len);
932 int i2d_ECPKParameters(const EC_GROUP *, unsigned char **out);
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), \
941 # define i2d_ECPKParameters_fp(fp,x) \
942 ASN1_i2d_fp((i2d_of_void *)i2d_ECPKParameters, (fp), (void *)(x))
944 # ifndef OPENSSL_NO_DEPRECATED_3_0
945 OSSL_DEPRECATEDIN_3_0 int ECPKParameters_print(BIO *bp, const EC_GROUP *x,
947 # ifndef OPENSSL_NO_STDIO
948 OSSL_DEPRECATEDIN_3_0 int ECPKParameters_print_fp(FILE *fp, const EC_GROUP *x,
951 # endif /* OPENSSL_NO_DEPRECATED_3_0 */
953 /********************************************************************/
954 /* EC_KEY functions */
955 /********************************************************************/
957 /* some values for the encoding_flag */
958 # define EC_PKEY_NO_PARAMETERS 0x001
959 # define EC_PKEY_NO_PUBKEY 0x002
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)
969 /* Deprecated flags - it was using 0x01..0x02 */
970 # define EC_FLAG_NON_FIPS_ALLOW 0x0000
971 # define EC_FLAG_FIPS_CHECKED 0x0000
973 # ifndef OPENSSL_NO_DEPRECATED_3_0
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.
980 OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_new_ex(OSSL_LIB_CTX *ctx, const char *propq);
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.
987 OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_new(void);
989 OSSL_DEPRECATEDIN_3_0 int EC_KEY_get_flags(const EC_KEY *key);
991 OSSL_DEPRECATEDIN_3_0 void EC_KEY_set_flags(EC_KEY *key, int flags);
993 OSSL_DEPRECATEDIN_3_0 void EC_KEY_clear_flags(EC_KEY *key, int flags);
995 OSSL_DEPRECATEDIN_3_0 int EC_KEY_decoded_from_explicit_params(const EC_KEY *key);
998 * Creates a new EC_KEY object using a named curve as underlying
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.
1006 OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_new_by_curve_name_ex(OSSL_LIB_CTX *ctx,
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.
1017 OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_new_by_curve_name(int nid);
1019 /** Frees a EC_KEY object.
1020 * \param key EC_KEY object to be freed.
1022 OSSL_DEPRECATEDIN_3_0 void EC_KEY_free(EC_KEY *key);
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.
1029 OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_copy(EC_KEY *dst, const EC_KEY *src);
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.
1035 OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_dup(const EC_KEY *src);
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.
1041 OSSL_DEPRECATEDIN_3_0 int EC_KEY_up_ref(EC_KEY *key);
1043 /** Returns the ENGINE object of a EC_KEY object
1044 * \param eckey EC_KEY object
1045 * \return the ENGINE object (possibly NULL).
1047 OSSL_DEPRECATEDIN_3_0 ENGINE *EC_KEY_get0_engine(const EC_KEY *eckey);
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).
1053 OSSL_DEPRECATEDIN_3_0 const EC_GROUP *EC_KEY_get0_group(const EC_KEY *key);
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.
1061 OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_group(EC_KEY *key, const EC_GROUP *group);
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).
1067 OSSL_DEPRECATEDIN_3_0 const BIGNUM *EC_KEY_get0_private_key(const EC_KEY *key);
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.
1075 OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *prv);
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)
1081 OSSL_DEPRECATEDIN_3_0 const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *key);
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.
1089 OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub);
1091 OSSL_DEPRECATEDIN_3_0 unsigned EC_KEY_get_enc_flags(const EC_KEY *key);
1092 OSSL_DEPRECATEDIN_3_0 void EC_KEY_set_enc_flags(EC_KEY *eckey, unsigned int flags);
1093 OSSL_DEPRECATEDIN_3_0 point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key);
1094 OSSL_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 */
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)
1101 # ifndef OPENSSL_NO_DEPRECATED_3_0
1102 OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_ex_data(EC_KEY *key, int idx, void *arg);
1103 OSSL_DEPRECATEDIN_3_0 void *EC_KEY_get_ex_data(const EC_KEY *key, int idx);
1105 /* wrapper functions for the underlying EC_GROUP object */
1106 OSSL_DEPRECATEDIN_3_0 void EC_KEY_set_asn1_flag(EC_KEY *eckey, int asn1_flag);
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.
1114 OSSL_DEPRECATEDIN_3_0 int EC_KEY_precompute_mult(EC_KEY *key, BN_CTX *ctx);
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.
1120 OSSL_DEPRECATEDIN_3_0 int EC_KEY_generate_key(EC_KEY *key);
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.
1126 OSSL_DEPRECATEDIN_3_0 int EC_KEY_check_key(const EC_KEY *key);
1128 /** Indicates if an EC_KEY can be used for signing.
1129 * \param eckey the EC_KEY object
1130 * \return 1 if can can sign and 0 otherwise.
1132 OSSL_DEPRECATEDIN_3_0 int EC_KEY_can_sign(const EC_KEY *eckey);
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.
1141 OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_public_key_affine_coordinates(EC_KEY *key,
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
1152 OSSL_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);
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
1164 OSSL_DEPRECATEDIN_3_0 int EC_KEY_oct2key(EC_KEY *key, const unsigned char *buf,
1165 size_t len, BN_CTX *ctx);
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
1174 OSSL_DEPRECATEDIN_3_0 int EC_KEY_oct2priv(EC_KEY *key, const unsigned char *buf,
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
1185 OSSL_DEPRECATEDIN_3_0 size_t EC_KEY_priv2oct(const EC_KEY *key,
1186 unsigned char *buf, size_t len);
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
1193 OSSL_DEPRECATEDIN_3_0 size_t EC_KEY_priv2buf(const EC_KEY *eckey,
1194 unsigned char **pbuf);
1196 /********************************************************************/
1197 /* de- and encoding functions for SEC1 ECPrivateKey */
1198 /********************************************************************/
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.
1206 OSSL_DEPRECATEDIN_3_0 EC_KEY *d2i_ECPrivateKey(EC_KEY **key,
1207 const unsigned char **in,
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
1214 * \return 1 on success and 0 if an error occurred.
1216 OSSL_DEPRECATEDIN_3_0 int i2d_ECPrivateKey(const EC_KEY *key,
1217 unsigned char **out);
1219 /********************************************************************/
1220 /* de- and encoding functions for EC parameters */
1221 /********************************************************************/
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
1230 OSSL_DEPRECATEDIN_3_0 EC_KEY *d2i_ECParameters(EC_KEY **key,
1231 const unsigned char **in,
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
1238 * \return 1 on success and 0 if an error occurred.
1240 OSSL_DEPRECATEDIN_3_0 int i2d_ECParameters(const EC_KEY *key,
1241 unsigned char **out);
1243 /********************************************************************/
1244 /* de- and encoding functions for EC public key */
1245 /* (octet string, not DER -- hence 'o2i' and 'i2o') */
1246 /********************************************************************/
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
1255 OSSL_DEPRECATEDIN_3_0 EC_KEY *o2i_ECPublicKey(EC_KEY **key,
1256 const unsigned char **in, long len);
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
1262 * \return 1 on success and 0 if an error occurred
1264 OSSL_DEPRECATEDIN_3_0 int i2o_ECPublicKey(const EC_KEY *key, unsigned char **out);
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
1271 OSSL_DEPRECATEDIN_3_0 int ECParameters_print(BIO *bp, const EC_KEY *key);
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
1279 OSSL_DEPRECATEDIN_3_0 int EC_KEY_print(BIO *bp, const EC_KEY *key, int off);
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
1287 OSSL_DEPRECATEDIN_3_0 int ECParameters_print_fp(FILE *fp, const EC_KEY *key);
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
1295 OSSL_DEPRECATEDIN_3_0 int EC_KEY_print_fp(FILE *fp, const EC_KEY *key, int off);
1296 # endif /* OPENSSL_NO_STDIO */
1298 OSSL_DEPRECATEDIN_3_0 const EC_KEY_METHOD *EC_KEY_OpenSSL(void);
1299 OSSL_DEPRECATEDIN_3_0 const EC_KEY_METHOD *EC_KEY_get_default_method(void);
1300 OSSL_DEPRECATEDIN_3_0 void EC_KEY_set_default_method(const EC_KEY_METHOD *meth);
1301 OSSL_DEPRECATEDIN_3_0 const EC_KEY_METHOD *EC_KEY_get_method(const EC_KEY *key);
1302 OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_method(EC_KEY *key, const EC_KEY_METHOD *meth);
1303 OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_new_method(ENGINE *engine);
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
1310 OSSL_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);
1315 OSSL_DEPRECATEDIN_3_0 int ECDH_compute_key(void *out, size_t outlen,
1316 const EC_POINT *pub_key,
1318 void *(*KDF)(const void *in,
1319 size_t inlen, void *out,
1321 # endif /* OPENSSL_NO_DEPRECATED_3_0 */
1323 typedef struct ECDSA_SIG_st ECDSA_SIG;
1325 /** Allocates and initialize a ECDSA_SIG structure
1326 * \return pointer to a ECDSA_SIG structure or NULL if an error occurred
1328 ECDSA_SIG *ECDSA_SIG_new(void);
1330 /** frees a ECDSA_SIG structure
1331 * \param sig pointer to the ECDSA_SIG structure
1333 void ECDSA_SIG_free(ECDSA_SIG *sig);
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
1342 DECLARE_ASN1_ENCODE_FUNCTIONS_only(ECDSA_SIG, ECDSA_SIG)
1344 /** d2i_ECDSA_SIG decodes an ECDSA signature (note: this function modifies *pp
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)
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)
1357 void ECDSA_SIG_get0(const ECDSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps);
1359 /** Accessor for r field of ECDSA_SIG
1360 * \param sig pointer to ECDSA_SIG structure
1362 const BIGNUM *ECDSA_SIG_get0_r(const ECDSA_SIG *sig);
1364 /** Accessor for s field of ECDSA_SIG
1365 * \param sig pointer to ECDSA_SIG structure
1367 const BIGNUM *ECDSA_SIG_get0_s(const ECDSA_SIG *sig);
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
1374 int ECDSA_SIG_set0(ECDSA_SIG *sig, BIGNUM *r, BIGNUM *s);
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
1384 OSSL_DEPRECATEDIN_3_0 ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst,
1385 int dgst_len, EC_KEY *eckey);
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
1397 OSSL_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);
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
1410 OSSL_DEPRECATEDIN_3_0 int ECDSA_do_verify(const unsigned char *dgst, int dgst_len,
1411 const ECDSA_SIG *sig, EC_KEY *eckey);
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
1420 OSSL_DEPRECATEDIN_3_0 int ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx,
1421 BIGNUM **kinv, BIGNUM **rp);
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
1433 OSSL_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);
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
1450 OSSL_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);
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
1466 OSSL_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);
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
1474 OSSL_DEPRECATEDIN_3_0 int ECDSA_size(const EC_KEY *eckey);
1476 /********************************************************************/
1477 /* EC_KEY_METHOD constructors, destructors, writers and accessors */
1478 /********************************************************************/
1480 OSSL_DEPRECATEDIN_3_0 EC_KEY_METHOD *EC_KEY_METHOD_new(const EC_KEY_METHOD *meth);
1481 OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_free(EC_KEY_METHOD *meth);
1482 OSSL_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));
1491 OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_set_keygen(EC_KEY_METHOD *meth,
1492 int (*keygen)(EC_KEY *key));
1494 OSSL_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));
1499 OSSL_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,
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,
1510 const BIGNUM *in_kinv,
1514 OSSL_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,
1524 OSSL_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));
1533 OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_get_keygen
1534 (const EC_KEY_METHOD *meth, int (**pkeygen)(EC_KEY *key));
1536 OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_get_compute_key
1537 (const EC_KEY_METHOD *meth,
1538 int (**pck)(unsigned char **psec,
1540 const EC_POINT *pub_key,
1541 const EC_KEY *ecdh));
1543 OSSL_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,
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,
1554 const BIGNUM *in_kinv,
1558 OSSL_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,
1566 const ECDSA_SIG *sig,
1568 # endif /* OPENSSL_NO_DEPRECATED_3_0 */
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)
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)