2 * Copyright 2002-2021 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>
27 /* Values for EVP_PKEY_CTX_set_ec_param_enc() */
28 # define OPENSSL_EC_EXPLICIT_CURVE 0x000
29 # define OPENSSL_EC_NAMED_CURVE 0x001
31 int EVP_PKEY_CTX_set_ec_paramgen_curve_nid(EVP_PKEY_CTX *ctx, int nid);
32 int EVP_PKEY_CTX_set_ec_param_enc(EVP_PKEY_CTX *ctx, int param_enc);
33 int EVP_PKEY_CTX_set_ecdh_cofactor_mode(EVP_PKEY_CTX *ctx, int cofactor_mode);
34 int EVP_PKEY_CTX_get_ecdh_cofactor_mode(EVP_PKEY_CTX *ctx);
36 int EVP_PKEY_CTX_set_ecdh_kdf_type(EVP_PKEY_CTX *ctx, int kdf);
37 int EVP_PKEY_CTX_get_ecdh_kdf_type(EVP_PKEY_CTX *ctx);
39 int EVP_PKEY_CTX_set_ecdh_kdf_md(EVP_PKEY_CTX *ctx, const EVP_MD *md);
40 int EVP_PKEY_CTX_get_ecdh_kdf_md(EVP_PKEY_CTX *ctx, const EVP_MD **md);
42 int EVP_PKEY_CTX_set_ecdh_kdf_outlen(EVP_PKEY_CTX *ctx, int len);
43 int EVP_PKEY_CTX_get_ecdh_kdf_outlen(EVP_PKEY_CTX *ctx, int *len);
45 int EVP_PKEY_CTX_set0_ecdh_kdf_ukm(EVP_PKEY_CTX *ctx, unsigned char *ukm,
47 # ifndef OPENSSL_NO_DEPRECATED_3_0
49 int EVP_PKEY_CTX_get0_ecdh_kdf_ukm(EVP_PKEY_CTX *ctx, unsigned char **ukm);
52 # define EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID (EVP_PKEY_ALG_CTRL + 1)
53 # define EVP_PKEY_CTRL_EC_PARAM_ENC (EVP_PKEY_ALG_CTRL + 2)
54 # define EVP_PKEY_CTRL_EC_ECDH_COFACTOR (EVP_PKEY_ALG_CTRL + 3)
55 # define EVP_PKEY_CTRL_EC_KDF_TYPE (EVP_PKEY_ALG_CTRL + 4)
56 # define EVP_PKEY_CTRL_EC_KDF_MD (EVP_PKEY_ALG_CTRL + 5)
57 # define EVP_PKEY_CTRL_GET_EC_KDF_MD (EVP_PKEY_ALG_CTRL + 6)
58 # define EVP_PKEY_CTRL_EC_KDF_OUTLEN (EVP_PKEY_ALG_CTRL + 7)
59 # define EVP_PKEY_CTRL_GET_EC_KDF_OUTLEN (EVP_PKEY_ALG_CTRL + 8)
60 # define EVP_PKEY_CTRL_EC_KDF_UKM (EVP_PKEY_ALG_CTRL + 9)
61 # define EVP_PKEY_CTRL_GET_EC_KDF_UKM (EVP_PKEY_ALG_CTRL + 10)
64 # define EVP_PKEY_ECDH_KDF_NONE 1
65 # define EVP_PKEY_ECDH_KDF_X9_63 2
67 * The old name for EVP_PKEY_ECDH_KDF_X9_63
68 * The ECDH KDF specification has been mistakenly attributed to ANSI X9.62,
69 * it is actually specified in ANSI X9.63.
70 * This identifier is retained for backwards compatibility
72 # define EVP_PKEY_ECDH_KDF_X9_62 EVP_PKEY_ECDH_KDF_X9_63
74 /** Enum for the point conversion form as defined in X9.62 (ECDSA)
75 * for the encoding of a elliptic curve point (x,y) */
77 /** the point is encoded as z||x, where the octet z specifies
78 * which solution of the quadratic equation y is */
79 POINT_CONVERSION_COMPRESSED = 2,
80 /** the point is encoded as z||x||y, where z is the octet 0x04 */
81 POINT_CONVERSION_UNCOMPRESSED = 4,
82 /** the point is encoded as z||x||y, where the octet z specifies
83 * which solution of the quadratic equation y is */
84 POINT_CONVERSION_HYBRID = 6
85 } point_conversion_form_t;
87 const char *OSSL_EC_curve_nid2name(int nid);
89 # ifndef OPENSSL_NO_EC
90 # include <openssl/asn1.h>
91 # include <openssl/symhacks.h>
92 # ifndef OPENSSL_NO_DEPRECATED_1_1_0
93 # include <openssl/bn.h>
95 # include <openssl/ecerr.h>
97 # ifndef OPENSSL_ECC_MAX_FIELD_BITS
98 # define OPENSSL_ECC_MAX_FIELD_BITS 661
101 # include <openssl/params.h>
102 # ifndef OPENSSL_NO_DEPRECATED_3_0
103 typedef struct ec_method_st EC_METHOD;
105 typedef struct ec_group_st EC_GROUP;
106 typedef struct ec_point_st EC_POINT;
107 typedef struct ecpk_parameters_st ECPKPARAMETERS;
108 typedef struct ec_parameters_st ECPARAMETERS;
110 /********************************************************************/
111 /* EC_METHODs for curves over GF(p) */
112 /********************************************************************/
114 # ifndef OPENSSL_NO_DEPRECATED_3_0
115 /** Returns the basic GFp ec methods which provides the basis for the
117 * \return EC_METHOD object
119 OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_simple_method(void);
121 /** Returns GFp methods using montgomery multiplication.
122 * \return EC_METHOD object
124 OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_mont_method(void);
126 /** Returns GFp methods using optimized methods for NIST recommended curves
127 * \return EC_METHOD object
129 OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_nist_method(void);
131 # ifndef OPENSSL_NO_EC_NISTP_64_GCC_128
132 /** Returns 64-bit optimized methods for nistp224
133 * \return EC_METHOD object
135 OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_nistp224_method(void);
137 /** Returns 64-bit optimized methods for nistp256
138 * \return EC_METHOD object
140 OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_nistp256_method(void);
142 /** Returns 64-bit optimized methods for nistp521
143 * \return EC_METHOD object
145 OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GFp_nistp521_method(void);
146 # endif /* OPENSSL_NO_EC_NISTP_64_GCC_128 */
148 # ifndef OPENSSL_NO_EC2M
149 /********************************************************************/
150 /* EC_METHOD for curves over GF(2^m) */
151 /********************************************************************/
153 /** Returns the basic GF2m ec method
154 * \return EC_METHOD object
156 OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GF2m_simple_method(void);
160 /********************************************************************/
161 /* EC_GROUP functions */
162 /********************************************************************/
165 * Creates a new EC_GROUP object
166 * \param meth EC_METHOD to use
167 * \return newly created EC_GROUP object or NULL in case of an error.
169 OSSL_DEPRECATEDIN_3_0 EC_GROUP *EC_GROUP_new(const EC_METHOD *meth);
171 /** Clears and frees a EC_GROUP object
172 * \param group EC_GROUP object to be cleared and freed.
174 OSSL_DEPRECATEDIN_3_0 void EC_GROUP_clear_free(EC_GROUP *group);
176 /** Returns the EC_METHOD of the EC_GROUP object.
177 * \param group EC_GROUP object
178 * \return EC_METHOD used in this EC_GROUP object.
180 OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group);
182 /** Returns the field type of the EC_METHOD.
183 * \param meth EC_METHOD object
184 * \return NID of the underlying field type OID.
186 OSSL_DEPRECATEDIN_3_0 int EC_METHOD_get_field_type(const EC_METHOD *meth);
187 # endif /* OPENSSL_NO_DEPRECATED_3_0 */
189 /** Frees a EC_GROUP object
190 * \param group EC_GROUP object to be freed.
192 void EC_GROUP_free(EC_GROUP *group);
194 /** Copies EC_GROUP objects. Note: both EC_GROUPs must use the same EC_METHOD.
195 * \param dst destination EC_GROUP object
196 * \param src source EC_GROUP object
197 * \return 1 on success and 0 if an error occurred.
199 int EC_GROUP_copy(EC_GROUP *dst, const EC_GROUP *src);
201 /** Creates a new EC_GROUP object and copies the content
202 * form src to the newly created EC_KEY object
203 * \param src source EC_GROUP object
204 * \return newly created EC_GROUP object or NULL in case of an error.
206 EC_GROUP *EC_GROUP_dup(const EC_GROUP *src);
208 /** Sets the generator and its order/cofactor of a EC_GROUP object.
209 * \param group EC_GROUP object
210 * \param generator EC_POINT object with the generator.
211 * \param order the order of the group generated by the generator.
212 * \param cofactor the index of the sub-group generated by the generator
213 * in the group of all points on the elliptic curve.
214 * \return 1 on success and 0 if an error occurred
216 int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator,
217 const BIGNUM *order, const BIGNUM *cofactor);
219 /** Returns the generator of a EC_GROUP object.
220 * \param group EC_GROUP object
221 * \return the currently used generator (possibly NULL).
223 const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group);
225 /** Returns the montgomery data for order(Generator)
226 * \param group EC_GROUP object
227 * \return the currently used montgomery data (possibly NULL).
229 BN_MONT_CTX *EC_GROUP_get_mont_data(const EC_GROUP *group);
231 /** Gets the order of a EC_GROUP
232 * \param group EC_GROUP object
233 * \param order BIGNUM to which the order is copied
235 * \return 1 on success and 0 if an error occurred
237 int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx);
239 /** Gets the order of an EC_GROUP
240 * \param group EC_GROUP object
241 * \return the group order
243 const BIGNUM *EC_GROUP_get0_order(const EC_GROUP *group);
245 /** Gets the number of bits of the order of an EC_GROUP
246 * \param group EC_GROUP object
247 * \return number of bits of group order.
249 int EC_GROUP_order_bits(const EC_GROUP *group);
251 /** Gets the cofactor of a EC_GROUP
252 * \param group EC_GROUP object
253 * \param cofactor BIGNUM to which the cofactor is copied
255 * \return 1 on success and 0 if an error occurred
257 int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor,
260 /** Gets the cofactor of an EC_GROUP
261 * \param group EC_GROUP object
262 * \return the group cofactor
264 const BIGNUM *EC_GROUP_get0_cofactor(const EC_GROUP *group);
266 /** Sets the name of a EC_GROUP object
267 * \param group EC_GROUP object
268 * \param nid NID of the curve name OID
270 void EC_GROUP_set_curve_name(EC_GROUP *group, int nid);
272 /** Returns the curve name of a EC_GROUP object
273 * \param group EC_GROUP object
274 * \return NID of the curve name OID or 0 if not set.
276 int EC_GROUP_get_curve_name(const EC_GROUP *group);
278 /** Gets the field of an EC_GROUP
279 * \param group EC_GROUP object
280 * \return the group field
282 const BIGNUM *EC_GROUP_get0_field(const EC_GROUP *group);
284 /** Returns the field type of the EC_GROUP.
285 * \param group EC_GROUP object
286 * \return NID of the underlying field type OID.
288 int EC_GROUP_get_field_type(const EC_GROUP *group);
290 void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag);
291 int EC_GROUP_get_asn1_flag(const EC_GROUP *group);
293 void EC_GROUP_set_point_conversion_form(EC_GROUP *group,
294 point_conversion_form_t form);
295 point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP *);
297 unsigned char *EC_GROUP_get0_seed(const EC_GROUP *x);
298 size_t EC_GROUP_get_seed_len(const EC_GROUP *);
299 size_t EC_GROUP_set_seed(EC_GROUP *, const unsigned char *, size_t len);
301 /** Sets the parameters of an ec curve defined by y^2 = x^3 + a*x + b (for GFp)
302 * or y^2 + x*y = x^3 + a*x^2 + b (for GF2m)
303 * \param group EC_GROUP object
304 * \param p BIGNUM with the prime number (GFp) or the polynomial
305 * defining the underlying field (GF2m)
306 * \param a BIGNUM with parameter a of the equation
307 * \param b BIGNUM with parameter b of the equation
308 * \param ctx BN_CTX object (optional)
309 * \return 1 on success and 0 if an error occurred
311 int EC_GROUP_set_curve(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a,
312 const BIGNUM *b, BN_CTX *ctx);
314 /** Gets the parameters of the ec curve defined by y^2 = x^3 + a*x + b (for GFp)
315 * or y^2 + x*y = x^3 + a*x^2 + b (for GF2m)
316 * \param group EC_GROUP object
317 * \param p BIGNUM with the prime number (GFp) or the polynomial
318 * defining the underlying field (GF2m)
319 * \param a BIGNUM for parameter a of the equation
320 * \param b BIGNUM for parameter b of the equation
321 * \param ctx BN_CTX object (optional)
322 * \return 1 on success and 0 if an error occurred
324 int EC_GROUP_get_curve(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b,
327 # ifndef OPENSSL_NO_DEPRECATED_3_0
328 /** Sets the parameters of an ec curve. Synonym for EC_GROUP_set_curve
329 * \param group EC_GROUP object
330 * \param p BIGNUM with the prime number (GFp) or the polynomial
331 * defining the underlying field (GF2m)
332 * \param a BIGNUM with parameter a of the equation
333 * \param b BIGNUM with parameter b of the equation
334 * \param ctx BN_CTX object (optional)
335 * \return 1 on success and 0 if an error occurred
337 OSSL_DEPRECATEDIN_3_0 int EC_GROUP_set_curve_GFp(EC_GROUP *group,
343 /** Gets the parameters of an ec curve. Synonym for EC_GROUP_get_curve
344 * \param group EC_GROUP object
345 * \param p BIGNUM with the prime number (GFp) or the polynomial
346 * defining the underlying field (GF2m)
347 * \param a BIGNUM for parameter a of the equation
348 * \param b BIGNUM for parameter b of the equation
349 * \param ctx BN_CTX object (optional)
350 * \return 1 on success and 0 if an error occurred
352 OSSL_DEPRECATEDIN_3_0 int EC_GROUP_get_curve_GFp(const EC_GROUP *group,
354 BIGNUM *a, BIGNUM *b,
357 # ifndef OPENSSL_NO_EC2M
358 /** Sets the parameter of an ec curve. Synonym for EC_GROUP_set_curve
359 * \param group EC_GROUP object
360 * \param p BIGNUM with the prime number (GFp) or the polynomial
361 * defining the underlying field (GF2m)
362 * \param a BIGNUM with parameter a of the equation
363 * \param b BIGNUM with parameter b of the equation
364 * \param ctx BN_CTX object (optional)
365 * \return 1 on success and 0 if an error occurred
367 OSSL_DEPRECATEDIN_3_0 int EC_GROUP_set_curve_GF2m(EC_GROUP *group,
373 /** Gets the parameters of an ec curve. Synonym for EC_GROUP_get_curve
374 * \param group EC_GROUP object
375 * \param p BIGNUM with the prime number (GFp) or the polynomial
376 * defining the underlying field (GF2m)
377 * \param a BIGNUM for parameter a of the equation
378 * \param b BIGNUM for parameter b of the equation
379 * \param ctx BN_CTX object (optional)
380 * \return 1 on success and 0 if an error occurred
382 OSSL_DEPRECATEDIN_3_0 int EC_GROUP_get_curve_GF2m(const EC_GROUP *group,
384 BIGNUM *a, BIGNUM *b,
386 # endif /* OPENSSL_NO_EC2M */
387 # endif /* OPENSSL_NO_DEPRECATED_3_0 */
389 /** Returns the number of bits needed to represent a field element
390 * \param group EC_GROUP object
391 * \return number of bits needed to represent a field element
393 int EC_GROUP_get_degree(const EC_GROUP *group);
395 /** Checks whether the parameter in the EC_GROUP define a valid ec group
396 * \param group EC_GROUP object
397 * \param ctx BN_CTX object (optional)
398 * \return 1 if group is a valid ec group and 0 otherwise
400 int EC_GROUP_check(const EC_GROUP *group, BN_CTX *ctx);
402 /** Checks whether the discriminant of the elliptic curve is zero or not
403 * \param group EC_GROUP object
404 * \param ctx BN_CTX object (optional)
405 * \return 1 if the discriminant is not zero and 0 otherwise
407 int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx);
409 /** Compares two EC_GROUP objects
410 * \param a first EC_GROUP object
411 * \param b second EC_GROUP object
412 * \param ctx BN_CTX object (optional)
413 * \return 0 if the groups are equal, 1 if not, or -1 on error
415 int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx);
418 * EC_GROUP_new_GF*() calls EC_GROUP_new() and EC_GROUP_set_GF*() after
419 * choosing an appropriate EC_METHOD
422 /** Creates a new EC_GROUP object with the specified parameters defined
423 * over GFp (defined by the equation y^2 = x^3 + a*x + b)
424 * \param p BIGNUM with the prime number
425 * \param a BIGNUM with the parameter a of the equation
426 * \param b BIGNUM with the parameter b of the equation
427 * \param ctx BN_CTX object (optional)
428 * \return newly created EC_GROUP object with the specified parameters
430 EC_GROUP *EC_GROUP_new_curve_GFp(const BIGNUM *p, const BIGNUM *a,
431 const BIGNUM *b, BN_CTX *ctx);
432 # ifndef OPENSSL_NO_EC2M
433 /** Creates a new EC_GROUP object with the specified parameters defined
434 * over GF2m (defined by the equation y^2 + x*y = x^3 + a*x^2 + b)
435 * \param p BIGNUM with the polynomial defining the underlying field
436 * \param a BIGNUM with the parameter a of the equation
437 * \param b BIGNUM with the parameter b of the equation
438 * \param ctx BN_CTX object (optional)
439 * \return newly created EC_GROUP object with the specified parameters
441 EC_GROUP *EC_GROUP_new_curve_GF2m(const BIGNUM *p, const BIGNUM *a,
442 const BIGNUM *b, BN_CTX *ctx);
446 * Creates a EC_GROUP object with a curve specified by parameters.
447 * The parameters may be explicit or a named curve,
448 * \param params A list of parameters describing the group.
449 * \param libctx The associated library context or NULL for the default
451 * \param propq A property query string
452 * \return newly created EC_GROUP object with specified parameters or NULL
453 * if an error occurred
455 EC_GROUP *EC_GROUP_new_from_params(const OSSL_PARAM params[],
456 OSSL_LIB_CTX *libctx, const char *propq);
459 * Creates a EC_GROUP object with a curve specified by a NID
460 * \param libctx The associated library context or NULL for the default
462 * \param propq A property query string
463 * \param nid NID of the OID of the curve name
464 * \return newly created EC_GROUP object with specified curve or NULL
465 * if an error occurred
467 EC_GROUP *EC_GROUP_new_by_curve_name_ex(OSSL_LIB_CTX *libctx, const char *propq,
471 * Creates a EC_GROUP object with a curve specified by a NID. Same as
472 * EC_GROUP_new_by_curve_name_ex but the libctx and propq are always
474 * \param nid NID of the OID of the curve name
475 * \return newly created EC_GROUP object with specified curve or NULL
476 * if an error occurred
478 EC_GROUP *EC_GROUP_new_by_curve_name(int nid);
480 /** Creates a new EC_GROUP object from an ECPARAMETERS object
481 * \param params pointer to the ECPARAMETERS object
482 * \return newly created EC_GROUP object with specified curve or NULL
483 * if an error occurred
485 EC_GROUP *EC_GROUP_new_from_ecparameters(const ECPARAMETERS *params);
487 /** Creates an ECPARAMETERS object for the given EC_GROUP object.
488 * \param group pointer to the EC_GROUP object
489 * \param params pointer to an existing ECPARAMETERS object or NULL
490 * \return pointer to the new ECPARAMETERS object or NULL
491 * if an error occurred.
493 ECPARAMETERS *EC_GROUP_get_ecparameters(const EC_GROUP *group,
494 ECPARAMETERS *params);
496 /** Creates a new EC_GROUP object from an ECPKPARAMETERS object
497 * \param params pointer to an existing ECPKPARAMETERS object, or NULL
498 * \return newly created EC_GROUP object with specified curve, or NULL
499 * if an error occurred
501 EC_GROUP *EC_GROUP_new_from_ecpkparameters(const ECPKPARAMETERS *params);
503 /** Creates an ECPKPARAMETERS object for the given EC_GROUP object.
504 * \param group pointer to the EC_GROUP object
505 * \param params pointer to an existing ECPKPARAMETERS object or NULL
506 * \return pointer to the new ECPKPARAMETERS object or NULL
507 * if an error occurred.
509 ECPKPARAMETERS *EC_GROUP_get_ecpkparameters(const EC_GROUP *group,
510 ECPKPARAMETERS *params);
512 /********************************************************************/
513 /* handling of internal curves */
514 /********************************************************************/
522 * EC_builtin_curves(EC_builtin_curve *r, size_t size) returns number of all
523 * available curves or zero if a error occurred. In case r is not zero,
524 * nitems EC_builtin_curve structures are filled with the data of the first
525 * nitems internal groups
527 size_t EC_get_builtin_curves(EC_builtin_curve *r, size_t nitems);
529 const char *EC_curve_nid2nist(int nid);
530 int EC_curve_nist2nid(const char *name);
531 int EC_GROUP_check_named_curve(const EC_GROUP *group, int nist_only,
534 /********************************************************************/
535 /* EC_POINT functions */
536 /********************************************************************/
538 /** Creates a new EC_POINT object for the specified EC_GROUP
539 * \param group EC_GROUP the underlying EC_GROUP object
540 * \return newly created EC_POINT object or NULL if an error occurred
542 EC_POINT *EC_POINT_new(const EC_GROUP *group);
544 /** Frees a EC_POINT object
545 * \param point EC_POINT object to be freed
547 void EC_POINT_free(EC_POINT *point);
549 /** Clears and frees a EC_POINT object
550 * \param point EC_POINT object to be cleared and freed
552 void EC_POINT_clear_free(EC_POINT *point);
554 /** Copies EC_POINT object
555 * \param dst destination EC_POINT object
556 * \param src source EC_POINT object
557 * \return 1 on success and 0 if an error occurred
559 int EC_POINT_copy(EC_POINT *dst, const EC_POINT *src);
561 /** Creates a new EC_POINT object and copies the content of the supplied
563 * \param src source EC_POINT object
564 * \param group underlying the EC_GROUP object
565 * \return newly created EC_POINT object or NULL if an error occurred
567 EC_POINT *EC_POINT_dup(const EC_POINT *src, const EC_GROUP *group);
569 /** Sets a point to infinity (neutral element)
570 * \param group underlying EC_GROUP object
571 * \param point EC_POINT to set to infinity
572 * \return 1 on success and 0 if an error occurred
574 int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point);
576 # ifndef OPENSSL_NO_DEPRECATED_3_0
577 /** Returns the EC_METHOD used in EC_POINT object
578 * \param point EC_POINT object
579 * \return the EC_METHOD used
581 OSSL_DEPRECATEDIN_3_0 const EC_METHOD *EC_POINT_method_of(const EC_POINT *point);
583 /** Sets the jacobian projective coordinates of a EC_POINT over GFp
584 * \param group underlying EC_GROUP object
585 * \param p EC_POINT object
586 * \param x BIGNUM with the x-coordinate
587 * \param y BIGNUM with the y-coordinate
588 * \param z BIGNUM with the z-coordinate
589 * \param ctx BN_CTX object (optional)
590 * \return 1 on success and 0 if an error occurred
592 OSSL_DEPRECATEDIN_3_0 int EC_POINT_set_Jprojective_coordinates_GFp
593 (const EC_GROUP *group, EC_POINT *p,
594 const BIGNUM *x, const BIGNUM *y, const BIGNUM *z,
597 /** Gets the jacobian projective coordinates of a EC_POINT over GFp
598 * \param group underlying EC_GROUP object
599 * \param p EC_POINT object
600 * \param x BIGNUM for the x-coordinate
601 * \param y BIGNUM for the y-coordinate
602 * \param z BIGNUM for the z-coordinate
603 * \param ctx BN_CTX object (optional)
604 * \return 1 on success and 0 if an error occurred
606 OSSL_DEPRECATEDIN_3_0 int EC_POINT_get_Jprojective_coordinates_GFp
607 (const EC_GROUP *group, const EC_POINT *p,
608 BIGNUM *x, BIGNUM *y, BIGNUM *z, BN_CTX *ctx);
609 # endif /* OPENSSL_NO_DEPRECATED_3_0 */
611 /** Sets the affine coordinates of an EC_POINT
612 * \param group underlying EC_GROUP object
613 * \param p EC_POINT object
614 * \param x BIGNUM with the x-coordinate
615 * \param y BIGNUM with the y-coordinate
616 * \param ctx BN_CTX object (optional)
617 * \return 1 on success and 0 if an error occurred
619 int EC_POINT_set_affine_coordinates(const EC_GROUP *group, EC_POINT *p,
620 const BIGNUM *x, const BIGNUM *y,
623 /** Gets the affine coordinates of an EC_POINT.
624 * \param group underlying EC_GROUP object
625 * \param p EC_POINT object
626 * \param x BIGNUM for the x-coordinate
627 * \param y BIGNUM for the y-coordinate
628 * \param ctx BN_CTX object (optional)
629 * \return 1 on success and 0 if an error occurred
631 int EC_POINT_get_affine_coordinates(const EC_GROUP *group, const EC_POINT *p,
632 BIGNUM *x, BIGNUM *y, BN_CTX *ctx);
634 # ifndef OPENSSL_NO_DEPRECATED_3_0
635 /** Sets the affine coordinates of an EC_POINT. A synonym of
636 * EC_POINT_set_affine_coordinates
637 * \param group underlying EC_GROUP object
638 * \param p EC_POINT object
639 * \param x BIGNUM with the x-coordinate
640 * \param y BIGNUM with the y-coordinate
641 * \param ctx BN_CTX object (optional)
642 * \return 1 on success and 0 if an error occurred
644 OSSL_DEPRECATEDIN_3_0 int EC_POINT_set_affine_coordinates_GFp
645 (const EC_GROUP *group, EC_POINT *p,
646 const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx);
648 /** Gets the affine coordinates of an EC_POINT. A synonym of
649 * EC_POINT_get_affine_coordinates
650 * \param group underlying EC_GROUP object
651 * \param p EC_POINT object
652 * \param x BIGNUM for the x-coordinate
653 * \param y BIGNUM for the y-coordinate
654 * \param ctx BN_CTX object (optional)
655 * \return 1 on success and 0 if an error occurred
657 OSSL_DEPRECATEDIN_3_0 int EC_POINT_get_affine_coordinates_GFp
658 (const EC_GROUP *group, const EC_POINT *p,
659 BIGNUM *x, BIGNUM *y, BN_CTX *ctx);
660 # endif /* OPENSSL_NO_DEPRECATED_3_0 */
662 /** Sets the x9.62 compressed coordinates of a EC_POINT
663 * \param group underlying EC_GROUP object
664 * \param p EC_POINT object
665 * \param x BIGNUM with x-coordinate
666 * \param y_bit integer with the y-Bit (either 0 or 1)
667 * \param ctx BN_CTX object (optional)
668 * \return 1 on success and 0 if an error occurred
670 int EC_POINT_set_compressed_coordinates(const EC_GROUP *group, EC_POINT *p,
671 const BIGNUM *x, int y_bit,
674 # ifndef OPENSSL_NO_DEPRECATED_3_0
675 /** Sets the x9.62 compressed coordinates of a EC_POINT. A synonym of
676 * EC_POINT_set_compressed_coordinates
677 * \param group underlying EC_GROUP object
678 * \param p EC_POINT object
679 * \param x BIGNUM with x-coordinate
680 * \param y_bit integer with the y-Bit (either 0 or 1)
681 * \param ctx BN_CTX object (optional)
682 * \return 1 on success and 0 if an error occurred
684 OSSL_DEPRECATEDIN_3_0 int EC_POINT_set_compressed_coordinates_GFp
685 (const EC_GROUP *group, EC_POINT *p,
686 const BIGNUM *x, int y_bit, BN_CTX *ctx);
687 # ifndef OPENSSL_NO_EC2M
688 /** Sets the affine coordinates of an EC_POINT. A synonym of
689 * EC_POINT_set_affine_coordinates
690 * \param group underlying EC_GROUP object
691 * \param p EC_POINT object
692 * \param x BIGNUM with the x-coordinate
693 * \param y BIGNUM with the y-coordinate
694 * \param ctx BN_CTX object (optional)
695 * \return 1 on success and 0 if an error occurred
697 OSSL_DEPRECATEDIN_3_0 int EC_POINT_set_affine_coordinates_GF2m
698 (const EC_GROUP *group, EC_POINT *p,
699 const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx);
701 /** Gets the affine coordinates of an EC_POINT. A synonym of
702 * EC_POINT_get_affine_coordinates
703 * \param group underlying EC_GROUP object
704 * \param p EC_POINT object
705 * \param x BIGNUM for the x-coordinate
706 * \param y BIGNUM for the y-coordinate
707 * \param ctx BN_CTX object (optional)
708 * \return 1 on success and 0 if an error occurred
710 OSSL_DEPRECATEDIN_3_0 int EC_POINT_get_affine_coordinates_GF2m
711 (const EC_GROUP *group, const EC_POINT *p,
712 BIGNUM *x, BIGNUM *y, BN_CTX *ctx);
714 /** Sets the x9.62 compressed coordinates of a EC_POINT. A synonym of
715 * EC_POINT_set_compressed_coordinates
716 * \param group underlying EC_GROUP object
717 * \param p EC_POINT object
718 * \param x BIGNUM with x-coordinate
719 * \param y_bit integer with the y-Bit (either 0 or 1)
720 * \param ctx BN_CTX object (optional)
721 * \return 1 on success and 0 if an error occurred
723 OSSL_DEPRECATEDIN_3_0 int EC_POINT_set_compressed_coordinates_GF2m
724 (const EC_GROUP *group, EC_POINT *p,
725 const BIGNUM *x, int y_bit, BN_CTX *ctx);
727 # endif /* OPENSSL_NO_DEPRECATED_3_0 */
729 /** Encodes a EC_POINT object to a octet string
730 * \param group underlying EC_GROUP object
731 * \param p EC_POINT object
732 * \param form point conversion form
733 * \param buf memory buffer for the result. If NULL the function returns
734 * required buffer size.
735 * \param len length of the memory buffer
736 * \param ctx BN_CTX object (optional)
737 * \return the length of the encoded octet string or 0 if an error occurred
739 size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *p,
740 point_conversion_form_t form,
741 unsigned char *buf, size_t len, BN_CTX *ctx);
743 /** Decodes a EC_POINT from a octet string
744 * \param group underlying EC_GROUP object
745 * \param p EC_POINT object
746 * \param buf memory buffer with the encoded ec point
747 * \param len length of the encoded ec point
748 * \param ctx BN_CTX object (optional)
749 * \return 1 on success and 0 if an error occurred
751 int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *p,
752 const unsigned char *buf, size_t len, BN_CTX *ctx);
754 /** Encodes an EC_POINT object to an allocated octet string
755 * \param group underlying EC_GROUP object
756 * \param point EC_POINT object
757 * \param form point conversion form
758 * \param pbuf returns pointer to allocated buffer
759 * \param ctx BN_CTX object (optional)
760 * \return the length of the encoded octet string or 0 if an error occurred
762 size_t EC_POINT_point2buf(const EC_GROUP *group, const EC_POINT *point,
763 point_conversion_form_t form,
764 unsigned char **pbuf, BN_CTX *ctx);
766 /* other interfaces to point2oct/oct2point: */
767 # ifndef OPENSSL_NO_DEPRECATED_3_0
768 OSSL_DEPRECATEDIN_3_0 BIGNUM *EC_POINT_point2bn(const EC_GROUP *,
770 point_conversion_form_t form,
772 OSSL_DEPRECATEDIN_3_0 EC_POINT *EC_POINT_bn2point(const EC_GROUP *,
774 EC_POINT *, BN_CTX *);
775 # endif /* OPENSSL_NO_DEPRECATED_3_0 */
777 char *EC_POINT_point2hex(const EC_GROUP *, const EC_POINT *,
778 point_conversion_form_t form, BN_CTX *);
779 EC_POINT *EC_POINT_hex2point(const EC_GROUP *, const char *,
780 EC_POINT *, BN_CTX *);
782 /********************************************************************/
783 /* functions for doing EC_POINT arithmetic */
784 /********************************************************************/
786 /** Computes the sum of two EC_POINT
787 * \param group underlying EC_GROUP object
788 * \param r EC_POINT object for the result (r = a + b)
789 * \param a EC_POINT object with the first summand
790 * \param b EC_POINT object with the second summand
791 * \param ctx BN_CTX object (optional)
792 * \return 1 on success and 0 if an error occurred
794 int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a,
795 const EC_POINT *b, BN_CTX *ctx);
797 /** Computes the double of a EC_POINT
798 * \param group underlying EC_GROUP object
799 * \param r EC_POINT object for the result (r = 2 * a)
800 * \param a EC_POINT object
801 * \param ctx BN_CTX object (optional)
802 * \return 1 on success and 0 if an error occurred
804 int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a,
807 /** Computes the inverse of a EC_POINT
808 * \param group underlying EC_GROUP object
809 * \param a EC_POINT object to be inverted (it's used for the result as well)
810 * \param ctx BN_CTX object (optional)
811 * \return 1 on success and 0 if an error occurred
813 int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx);
815 /** Checks whether the point is the neutral element of the group
816 * \param group the underlying EC_GROUP object
817 * \param p EC_POINT object
818 * \return 1 if the point is the neutral element and 0 otherwise
820 int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *p);
822 /** Checks whether the point is on the curve
823 * \param group underlying EC_GROUP object
824 * \param point EC_POINT object to check
825 * \param ctx BN_CTX object (optional)
826 * \return 1 if the point is on the curve, 0 if not, or -1 on error
828 int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point,
831 /** Compares two EC_POINTs
832 * \param group underlying EC_GROUP object
833 * \param a first EC_POINT object
834 * \param b second EC_POINT object
835 * \param ctx BN_CTX object (optional)
836 * \return 1 if the points are not equal, 0 if they are, or -1 on error
838 int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b,
841 # ifndef OPENSSL_NO_DEPRECATED_3_0
842 OSSL_DEPRECATEDIN_3_0 int EC_POINT_make_affine(const EC_GROUP *group,
843 EC_POINT *point, BN_CTX *ctx);
844 OSSL_DEPRECATEDIN_3_0 int EC_POINTs_make_affine(const EC_GROUP *group, size_t num,
845 EC_POINT *points[], BN_CTX *ctx);
847 /** Computes r = generator * n + sum_{i=0}^{num-1} p[i] * m[i]
848 * \param group underlying EC_GROUP object
849 * \param r EC_POINT object for the result
850 * \param n BIGNUM with the multiplier for the group generator (optional)
851 * \param num number further summands
852 * \param p array of size num of EC_POINT objects
853 * \param m array of size num of BIGNUM objects
854 * \param ctx BN_CTX object (optional)
855 * \return 1 on success and 0 if an error occurred
857 OSSL_DEPRECATEDIN_3_0 int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r,
858 const BIGNUM *n, size_t num,
859 const EC_POINT *p[], const BIGNUM *m[],
861 # endif /* OPENSSL_NO_DEPRECATED_3_0 */
863 /** Computes r = generator * n + q * m
864 * \param group underlying EC_GROUP object
865 * \param r EC_POINT object for the result
866 * \param n BIGNUM with the multiplier for the group generator (optional)
867 * \param q EC_POINT object with the first factor of the second summand
868 * \param m BIGNUM with the second factor of the second summand
869 * \param ctx BN_CTX object (optional)
870 * \return 1 on success and 0 if an error occurred
872 int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *n,
873 const EC_POINT *q, const BIGNUM *m, BN_CTX *ctx);
875 # ifndef OPENSSL_NO_DEPRECATED_3_0
876 /** Stores multiples of generator for faster point multiplication
877 * \param group EC_GROUP object
878 * \param ctx BN_CTX object (optional)
879 * \return 1 on success and 0 if an error occurred
881 OSSL_DEPRECATEDIN_3_0 int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx);
883 /** Reports whether a precomputation has been done
884 * \param group EC_GROUP object
885 * \return 1 if a pre-computation has been done and 0 otherwise
887 OSSL_DEPRECATEDIN_3_0 int EC_GROUP_have_precompute_mult(const EC_GROUP *group);
888 # endif /* OPENSSL_NO_DEPRECATED_3_0 */
890 /********************************************************************/
892 /********************************************************************/
894 DECLARE_ASN1_ITEM(ECPKPARAMETERS)
895 DECLARE_ASN1_ALLOC_FUNCTIONS(ECPKPARAMETERS)
896 DECLARE_ASN1_ITEM(ECPARAMETERS)
897 DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
900 * EC_GROUP_get_basis_type() returns the NID of the basis type used to
901 * represent the field elements
903 int EC_GROUP_get_basis_type(const EC_GROUP *);
904 # ifndef OPENSSL_NO_EC2M
905 int EC_GROUP_get_trinomial_basis(const EC_GROUP *, unsigned int *k);
906 int EC_GROUP_get_pentanomial_basis(const EC_GROUP *, unsigned int *k1,
907 unsigned int *k2, unsigned int *k3);
910 EC_GROUP *d2i_ECPKParameters(EC_GROUP **, const unsigned char **in, long len);
911 int i2d_ECPKParameters(const EC_GROUP *, unsigned char **out);
913 # define d2i_ECPKParameters_bio(bp,x) \
914 ASN1_d2i_bio_of(EC_GROUP, NULL, d2i_ECPKParameters, bp, x)
915 # define i2d_ECPKParameters_bio(bp,x) \
916 ASN1_i2d_bio_of(EC_GROUP, i2d_ECPKParameters, bp, x)
917 # define d2i_ECPKParameters_fp(fp,x) \
918 (EC_GROUP *)ASN1_d2i_fp(NULL, (char *(*)())d2i_ECPKParameters, (fp), \
919 (unsigned char **)(x))
920 # define i2d_ECPKParameters_fp(fp,x) \
921 ASN1_i2d_fp(i2d_ECPKParameters,(fp), (unsigned char *)(x))
923 # ifndef OPENSSL_NO_DEPRECATED_3_0
924 OSSL_DEPRECATEDIN_3_0 int ECPKParameters_print(BIO *bp, const EC_GROUP *x,
926 # ifndef OPENSSL_NO_STDIO
927 OSSL_DEPRECATEDIN_3_0 int ECPKParameters_print_fp(FILE *fp, const EC_GROUP *x,
930 # endif /* OPENSSL_NO_DEPRECATED_3_0 */
932 /********************************************************************/
933 /* EC_KEY functions */
934 /********************************************************************/
936 /* some values for the encoding_flag */
937 # define EC_PKEY_NO_PARAMETERS 0x001
938 # define EC_PKEY_NO_PUBKEY 0x002
940 /* some values for the flags field */
941 # define EC_FLAG_SM2_RANGE 0x0004
942 # define EC_FLAG_COFACTOR_ECDH 0x1000
943 # define EC_FLAG_CHECK_NAMED_GROUP 0x2000
944 # define EC_FLAG_CHECK_NAMED_GROUP_NIST 0x4000
945 # define EC_FLAG_CHECK_NAMED_GROUP_MASK \
946 (EC_FLAG_CHECK_NAMED_GROUP | EC_FLAG_CHECK_NAMED_GROUP_NIST)
948 /* Deprecated flags - it was using 0x01..0x02 */
949 # define EC_FLAG_NON_FIPS_ALLOW 0x0000
950 # define EC_FLAG_FIPS_CHECKED 0x0000
952 # ifndef OPENSSL_NO_DEPRECATED_3_0
954 * Creates a new EC_KEY object.
955 * \param ctx The library context for to use for this EC_KEY. May be NULL in
956 * which case the default library context is used.
957 * \return EC_KEY object or NULL if an error occurred.
959 OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_new_ex(OSSL_LIB_CTX *ctx, const char *propq);
962 * Creates a new EC_KEY object. Same as calling EC_KEY_new_ex with a
963 * NULL library context
964 * \return EC_KEY object or NULL if an error occurred.
966 OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_new(void);
968 OSSL_DEPRECATEDIN_3_0 int EC_KEY_get_flags(const EC_KEY *key);
970 OSSL_DEPRECATEDIN_3_0 void EC_KEY_set_flags(EC_KEY *key, int flags);
972 OSSL_DEPRECATEDIN_3_0 void EC_KEY_clear_flags(EC_KEY *key, int flags);
974 OSSL_DEPRECATEDIN_3_0 int EC_KEY_decoded_from_explicit_params(const EC_KEY *key);
977 * Creates a new EC_KEY object using a named curve as underlying
979 * \param ctx The library context for to use for this EC_KEY. May be NULL in
980 * which case the default library context is used.
981 * \param propq Any property query string
982 * \param nid NID of the named curve.
983 * \return EC_KEY object or NULL if an error occurred.
985 OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_new_by_curve_name_ex(OSSL_LIB_CTX *ctx,
990 * Creates a new EC_KEY object using a named curve as underlying
991 * EC_GROUP object. Same as calling EC_KEY_new_by_curve_name_ex with a NULL
992 * library context and property query string.
993 * \param nid NID of the named curve.
994 * \return EC_KEY object or NULL if an error occurred.
996 OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_new_by_curve_name(int nid);
998 /** Frees a EC_KEY object.
999 * \param key EC_KEY object to be freed.
1001 OSSL_DEPRECATEDIN_3_0 void EC_KEY_free(EC_KEY *key);
1003 /** Copies a EC_KEY object.
1004 * \param dst destination EC_KEY object
1005 * \param src src EC_KEY object
1006 * \return dst or NULL if an error occurred.
1008 OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_copy(EC_KEY *dst, const EC_KEY *src);
1010 /** Creates a new EC_KEY object and copies the content from src to it.
1011 * \param src the source EC_KEY object
1012 * \return newly created EC_KEY object or NULL if an error occurred.
1014 OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_dup(const EC_KEY *src);
1016 /** Increases the internal reference count of a EC_KEY object.
1017 * \param key EC_KEY object
1018 * \return 1 on success and 0 if an error occurred.
1020 OSSL_DEPRECATEDIN_3_0 int EC_KEY_up_ref(EC_KEY *key);
1022 /** Returns the ENGINE object of a EC_KEY object
1023 * \param eckey EC_KEY object
1024 * \return the ENGINE object (possibly NULL).
1026 OSSL_DEPRECATEDIN_3_0 ENGINE *EC_KEY_get0_engine(const EC_KEY *eckey);
1028 /** Returns the EC_GROUP object of a EC_KEY object
1029 * \param key EC_KEY object
1030 * \return the EC_GROUP object (possibly NULL).
1032 OSSL_DEPRECATEDIN_3_0 const EC_GROUP *EC_KEY_get0_group(const EC_KEY *key);
1034 /** Sets the EC_GROUP of a EC_KEY object.
1035 * \param key EC_KEY object
1036 * \param group EC_GROUP to use in the EC_KEY object (note: the EC_KEY
1037 * object will use an own copy of the EC_GROUP).
1038 * \return 1 on success and 0 if an error occurred.
1040 OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_group(EC_KEY *key, const EC_GROUP *group);
1042 /** Returns the private key of a EC_KEY object.
1043 * \param key EC_KEY object
1044 * \return a BIGNUM with the private key (possibly NULL).
1046 OSSL_DEPRECATEDIN_3_0 const BIGNUM *EC_KEY_get0_private_key(const EC_KEY *key);
1048 /** Sets the private key of a EC_KEY object.
1049 * \param key EC_KEY object
1050 * \param prv BIGNUM with the private key (note: the EC_KEY object
1051 * will use an own copy of the BIGNUM).
1052 * \return 1 on success and 0 if an error occurred.
1054 OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *prv);
1056 /** Returns the public key of a EC_KEY object.
1057 * \param key the EC_KEY object
1058 * \return a EC_POINT object with the public key (possibly NULL)
1060 OSSL_DEPRECATEDIN_3_0 const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *key);
1062 /** Sets the public key of a EC_KEY object.
1063 * \param key EC_KEY object
1064 * \param pub EC_POINT object with the public key (note: the EC_KEY object
1065 * will use an own copy of the EC_POINT object).
1066 * \return 1 on success and 0 if an error occurred.
1068 OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub);
1070 OSSL_DEPRECATEDIN_3_0 unsigned EC_KEY_get_enc_flags(const EC_KEY *key);
1071 OSSL_DEPRECATEDIN_3_0 void EC_KEY_set_enc_flags(EC_KEY *eckey, unsigned int flags);
1072 OSSL_DEPRECATEDIN_3_0 point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key);
1073 OSSL_DEPRECATEDIN_3_0 void EC_KEY_set_conv_form(EC_KEY *eckey,
1074 point_conversion_form_t cform);
1075 # endif /*OPENSSL_NO_DEPRECATED_3_0 */
1077 # define EC_KEY_get_ex_new_index(l, p, newf, dupf, freef) \
1078 CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_EC_KEY, l, p, newf, dupf, freef)
1080 # ifndef OPENSSL_NO_DEPRECATED_3_0
1081 OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_ex_data(EC_KEY *key, int idx, void *arg);
1082 OSSL_DEPRECATEDIN_3_0 void *EC_KEY_get_ex_data(const EC_KEY *key, int idx);
1084 /* wrapper functions for the underlying EC_GROUP object */
1085 OSSL_DEPRECATEDIN_3_0 void EC_KEY_set_asn1_flag(EC_KEY *eckey, int asn1_flag);
1087 /** Creates a table of pre-computed multiples of the generator to
1088 * accelerate further EC_KEY operations.
1089 * \param key EC_KEY object
1090 * \param ctx BN_CTX object (optional)
1091 * \return 1 on success and 0 if an error occurred.
1093 OSSL_DEPRECATEDIN_3_0 int EC_KEY_precompute_mult(EC_KEY *key, BN_CTX *ctx);
1095 /** Creates a new ec private (and optional a new public) key.
1096 * \param key EC_KEY object
1097 * \return 1 on success and 0 if an error occurred.
1099 OSSL_DEPRECATEDIN_3_0 int EC_KEY_generate_key(EC_KEY *key);
1101 /** Verifies that a private and/or public key is valid.
1102 * \param key the EC_KEY object
1103 * \return 1 on success and 0 otherwise.
1105 OSSL_DEPRECATEDIN_3_0 int EC_KEY_check_key(const EC_KEY *key);
1107 /** Indicates if an EC_KEY can be used for signing.
1108 * \param eckey the EC_KEY object
1109 * \return 1 if can can sign and 0 otherwise.
1111 OSSL_DEPRECATEDIN_3_0 int EC_KEY_can_sign(const EC_KEY *eckey);
1113 /** Sets a public key from affine coordinates performing
1114 * necessary NIST PKV tests.
1115 * \param key the EC_KEY object
1116 * \param x public key x coordinate
1117 * \param y public key y coordinate
1118 * \return 1 on success and 0 otherwise.
1120 OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_public_key_affine_coordinates(EC_KEY *key,
1124 /** Encodes an EC_KEY public key to an allocated octet string
1125 * \param key key to encode
1126 * \param form point conversion form
1127 * \param pbuf returns pointer to allocated buffer
1128 * \param ctx BN_CTX object (optional)
1129 * \return the length of the encoded octet string or 0 if an error occurred
1131 OSSL_DEPRECATEDIN_3_0 size_t EC_KEY_key2buf(const EC_KEY *key,
1132 point_conversion_form_t form,
1133 unsigned char **pbuf, BN_CTX *ctx);
1135 /** Decodes a EC_KEY public key from a octet string
1136 * \param key key to decode
1137 * \param buf memory buffer with the encoded ec point
1138 * \param len length of the encoded ec point
1139 * \param ctx BN_CTX object (optional)
1140 * \return 1 on success and 0 if an error occurred
1143 OSSL_DEPRECATEDIN_3_0 int EC_KEY_oct2key(EC_KEY *key, const unsigned char *buf,
1144 size_t len, BN_CTX *ctx);
1146 /** Decodes an EC_KEY private key from an octet string
1147 * \param key key to decode
1148 * \param buf memory buffer with the encoded private key
1149 * \param len length of the encoded key
1150 * \return 1 on success and 0 if an error occurred
1153 OSSL_DEPRECATEDIN_3_0 int EC_KEY_oct2priv(EC_KEY *key, const unsigned char *buf,
1156 /** Encodes a EC_KEY private key to an octet string
1157 * \param key key to encode
1158 * \param buf memory buffer for the result. If NULL the function returns
1159 * required buffer size.
1160 * \param len length of the memory buffer
1161 * \return the length of the encoded octet string or 0 if an error occurred
1164 OSSL_DEPRECATEDIN_3_0 size_t EC_KEY_priv2oct(const EC_KEY *key,
1165 unsigned char *buf, size_t len);
1167 /** Encodes an EC_KEY private key to an allocated octet string
1168 * \param eckey key to encode
1169 * \param pbuf returns pointer to allocated buffer
1170 * \return the length of the encoded octet string or 0 if an error occurred
1172 OSSL_DEPRECATEDIN_3_0 size_t EC_KEY_priv2buf(const EC_KEY *eckey,
1173 unsigned char **pbuf);
1175 /********************************************************************/
1176 /* de- and encoding functions for SEC1 ECPrivateKey */
1177 /********************************************************************/
1179 /** Decodes a private key from a memory buffer.
1180 * \param key a pointer to a EC_KEY object which should be used (or NULL)
1181 * \param in pointer to memory with the DER encoded private key
1182 * \param len length of the DER encoded private key
1183 * \return the decoded private key or NULL if an error occurred.
1185 OSSL_DEPRECATEDIN_3_0 EC_KEY *d2i_ECPrivateKey(EC_KEY **key,
1186 const unsigned char **in,
1189 /** Encodes a private key object and stores the result in a buffer.
1190 * \param key the EC_KEY object to encode
1191 * \param out the buffer for the result (if NULL the function returns number
1193 * \return 1 on success and 0 if an error occurred.
1195 OSSL_DEPRECATEDIN_3_0 int i2d_ECPrivateKey(const EC_KEY *key,
1196 unsigned char **out);
1198 /********************************************************************/
1199 /* de- and encoding functions for EC parameters */
1200 /********************************************************************/
1202 /** Decodes ec parameter from a memory buffer.
1203 * \param key a pointer to a EC_KEY object which should be used (or NULL)
1204 * \param in pointer to memory with the DER encoded ec parameters
1205 * \param len length of the DER encoded ec parameters
1206 * \return a EC_KEY object with the decoded parameters or NULL if an error
1209 OSSL_DEPRECATEDIN_3_0 EC_KEY *d2i_ECParameters(EC_KEY **key,
1210 const unsigned char **in,
1213 /** Encodes ec parameter and stores the result in a buffer.
1214 * \param key the EC_KEY object with ec parameters to encode
1215 * \param out the buffer for the result (if NULL the function returns number
1217 * \return 1 on success and 0 if an error occurred.
1219 OSSL_DEPRECATEDIN_3_0 int i2d_ECParameters(const EC_KEY *key,
1220 unsigned char **out);
1222 /********************************************************************/
1223 /* de- and encoding functions for EC public key */
1224 /* (octet string, not DER -- hence 'o2i' and 'i2o') */
1225 /********************************************************************/
1227 /** Decodes an ec public key from a octet string.
1228 * \param key a pointer to a EC_KEY object which should be used
1229 * \param in memory buffer with the encoded public key
1230 * \param len length of the encoded public key
1231 * \return EC_KEY object with decoded public key or NULL if an error
1234 OSSL_DEPRECATEDIN_3_0 EC_KEY *o2i_ECPublicKey(EC_KEY **key,
1235 const unsigned char **in, long len);
1237 /** Encodes an ec public key in an octet string.
1238 * \param key the EC_KEY object with the public key
1239 * \param out the buffer for the result (if NULL the function returns number
1241 * \return 1 on success and 0 if an error occurred
1243 OSSL_DEPRECATEDIN_3_0 int i2o_ECPublicKey(const EC_KEY *key, unsigned char **out);
1245 /** Prints out the ec parameters on human readable form.
1246 * \param bp BIO object to which the information is printed
1247 * \param key EC_KEY object
1248 * \return 1 on success and 0 if an error occurred
1250 OSSL_DEPRECATEDIN_3_0 int ECParameters_print(BIO *bp, const EC_KEY *key);
1252 /** Prints out the contents of a EC_KEY object
1253 * \param bp BIO object to which the information is printed
1254 * \param key EC_KEY object
1255 * \param off line offset
1256 * \return 1 on success and 0 if an error occurred
1258 OSSL_DEPRECATEDIN_3_0 int EC_KEY_print(BIO *bp, const EC_KEY *key, int off);
1260 # ifndef OPENSSL_NO_STDIO
1261 /** Prints out the ec parameters on human readable form.
1262 * \param fp file descriptor to which the information is printed
1263 * \param key EC_KEY object
1264 * \return 1 on success and 0 if an error occurred
1266 OSSL_DEPRECATEDIN_3_0 int ECParameters_print_fp(FILE *fp, const EC_KEY *key);
1268 /** Prints out the contents of a EC_KEY object
1269 * \param fp file descriptor to which the information is printed
1270 * \param key EC_KEY object
1271 * \param off line offset
1272 * \return 1 on success and 0 if an error occurred
1274 OSSL_DEPRECATEDIN_3_0 int EC_KEY_print_fp(FILE *fp, const EC_KEY *key, int off);
1275 # endif /* OPENSSL_NO_STDIO */
1277 OSSL_DEPRECATEDIN_3_0 const EC_KEY_METHOD *EC_KEY_OpenSSL(void);
1278 OSSL_DEPRECATEDIN_3_0 const EC_KEY_METHOD *EC_KEY_get_default_method(void);
1279 OSSL_DEPRECATEDIN_3_0 void EC_KEY_set_default_method(const EC_KEY_METHOD *meth);
1280 OSSL_DEPRECATEDIN_3_0 const EC_KEY_METHOD *EC_KEY_get_method(const EC_KEY *key);
1281 OSSL_DEPRECATEDIN_3_0 int EC_KEY_set_method(EC_KEY *key, const EC_KEY_METHOD *meth);
1282 OSSL_DEPRECATEDIN_3_0 EC_KEY *EC_KEY_new_method(ENGINE *engine);
1284 /** The old name for ecdh_KDF_X9_63
1285 * The ECDH KDF specification has been mistakingly attributed to ANSI X9.62,
1286 * it is actually specified in ANSI X9.63.
1287 * This identifier is retained for backwards compatibility
1289 OSSL_DEPRECATEDIN_3_0 int ECDH_KDF_X9_62(unsigned char *out, size_t outlen,
1290 const unsigned char *Z, size_t Zlen,
1291 const unsigned char *sinfo,
1292 size_t sinfolen, const EVP_MD *md);
1294 OSSL_DEPRECATEDIN_3_0 int ECDH_compute_key(void *out, size_t outlen,
1295 const EC_POINT *pub_key,
1297 void *(*KDF)(const void *in,
1298 size_t inlen, void *out,
1300 # endif /* OPENSSL_NO_DEPRECATED_3_0 */
1302 typedef struct ECDSA_SIG_st ECDSA_SIG;
1304 /** Allocates and initialize a ECDSA_SIG structure
1305 * \return pointer to a ECDSA_SIG structure or NULL if an error occurred
1307 ECDSA_SIG *ECDSA_SIG_new(void);
1309 /** frees a ECDSA_SIG structure
1310 * \param sig pointer to the ECDSA_SIG structure
1312 void ECDSA_SIG_free(ECDSA_SIG *sig);
1314 /** i2d_ECDSA_SIG encodes content of ECDSA_SIG (note: this function modifies *pp
1315 * (*pp += length of the DER encoded signature)).
1316 * \param sig pointer to the ECDSA_SIG object
1317 * \param pp pointer to a unsigned char pointer for the output or NULL
1318 * \return the length of the DER encoded ECDSA_SIG object or a negative value
1321 DECLARE_ASN1_ENCODE_FUNCTIONS_only(ECDSA_SIG, ECDSA_SIG)
1323 /** d2i_ECDSA_SIG decodes an ECDSA signature (note: this function modifies *pp
1325 * \param sig pointer to ECDSA_SIG pointer (may be NULL)
1326 * \param pp memory buffer with the DER encoded signature
1327 * \param len length of the buffer
1328 * \return pointer to the decoded ECDSA_SIG structure (or NULL)
1331 /** Accessor for r and s fields of ECDSA_SIG
1332 * \param sig pointer to ECDSA_SIG structure
1333 * \param pr pointer to BIGNUM pointer for r (may be NULL)
1334 * \param ps pointer to BIGNUM pointer for s (may be NULL)
1336 void ECDSA_SIG_get0(const ECDSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps);
1338 /** Accessor for r field of ECDSA_SIG
1339 * \param sig pointer to ECDSA_SIG structure
1341 const BIGNUM *ECDSA_SIG_get0_r(const ECDSA_SIG *sig);
1343 /** Accessor for s field of ECDSA_SIG
1344 * \param sig pointer to ECDSA_SIG structure
1346 const BIGNUM *ECDSA_SIG_get0_s(const ECDSA_SIG *sig);
1348 /** Setter for r and s fields of ECDSA_SIG
1349 * \param sig pointer to ECDSA_SIG structure
1350 * \param r pointer to BIGNUM for r
1351 * \param s pointer to BIGNUM for s
1353 int ECDSA_SIG_set0(ECDSA_SIG *sig, BIGNUM *r, BIGNUM *s);
1355 # ifndef OPENSSL_NO_DEPRECATED_3_0
1356 /** Computes the ECDSA signature of the given hash value using
1357 * the supplied private key and returns the created signature.
1358 * \param dgst pointer to the hash value
1359 * \param dgst_len length of the hash value
1360 * \param eckey EC_KEY object containing a private EC key
1361 * \return pointer to a ECDSA_SIG structure or NULL if an error occurred
1363 OSSL_DEPRECATEDIN_3_0 ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst,
1364 int dgst_len, EC_KEY *eckey);
1366 /** Computes ECDSA signature of a given hash value using the supplied
1367 * private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
1368 * \param dgst pointer to the hash value to sign
1369 * \param dgstlen length of the hash value
1370 * \param kinv BIGNUM with a pre-computed inverse k (optional)
1371 * \param rp BIGNUM with a pre-computed rp value (optional),
1372 * see ECDSA_sign_setup
1373 * \param eckey EC_KEY object containing a private EC key
1374 * \return pointer to a ECDSA_SIG structure or NULL if an error occurred
1376 OSSL_DEPRECATEDIN_3_0 ECDSA_SIG *ECDSA_do_sign_ex(const unsigned char *dgst,
1377 int dgstlen, const BIGNUM *kinv,
1378 const BIGNUM *rp, EC_KEY *eckey);
1380 /** Verifies that the supplied signature is a valid ECDSA
1381 * signature of the supplied hash value using the supplied public key.
1382 * \param dgst pointer to the hash value
1383 * \param dgst_len length of the hash value
1384 * \param sig ECDSA_SIG structure
1385 * \param eckey EC_KEY object containing a public EC key
1386 * \return 1 if the signature is valid, 0 if the signature is invalid
1389 OSSL_DEPRECATEDIN_3_0 int ECDSA_do_verify(const unsigned char *dgst, int dgst_len,
1390 const ECDSA_SIG *sig, EC_KEY *eckey);
1392 /** Precompute parts of the signing operation
1393 * \param eckey EC_KEY object containing a private EC key
1394 * \param ctx BN_CTX object (optional)
1395 * \param kinv BIGNUM pointer for the inverse of k
1396 * \param rp BIGNUM pointer for x coordinate of k * generator
1397 * \return 1 on success and 0 otherwise
1399 OSSL_DEPRECATEDIN_3_0 int ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx,
1400 BIGNUM **kinv, BIGNUM **rp);
1402 /** Computes ECDSA signature of a given hash value using the supplied
1403 * private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
1404 * \param type this parameter is ignored
1405 * \param dgst pointer to the hash value to sign
1406 * \param dgstlen length of the hash value
1407 * \param sig memory for the DER encoded created signature
1408 * \param siglen pointer to the length of the returned signature
1409 * \param eckey EC_KEY object containing a private EC key
1410 * \return 1 on success and 0 otherwise
1412 OSSL_DEPRECATEDIN_3_0 int ECDSA_sign(int type, const unsigned char *dgst,
1413 int dgstlen, unsigned char *sig,
1414 unsigned int *siglen, EC_KEY *eckey);
1416 /** Computes ECDSA signature of a given hash value using the supplied
1417 * private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
1418 * \param type this parameter is ignored
1419 * \param dgst pointer to the hash value to sign
1420 * \param dgstlen length of the hash value
1421 * \param sig buffer to hold the DER encoded signature
1422 * \param siglen pointer to the length of the returned signature
1423 * \param kinv BIGNUM with a pre-computed inverse k (optional)
1424 * \param rp BIGNUM with a pre-computed rp value (optional),
1425 * see ECDSA_sign_setup
1426 * \param eckey EC_KEY object containing a private EC key
1427 * \return 1 on success and 0 otherwise
1429 OSSL_DEPRECATEDIN_3_0 int ECDSA_sign_ex(int type, const unsigned char *dgst,
1430 int dgstlen, unsigned char *sig,
1431 unsigned int *siglen, const BIGNUM *kinv,
1432 const BIGNUM *rp, EC_KEY *eckey);
1434 /** Verifies that the given signature is valid ECDSA signature
1435 * of the supplied hash value using the specified public key.
1436 * \param type this parameter is ignored
1437 * \param dgst pointer to the hash value
1438 * \param dgstlen length of the hash value
1439 * \param sig pointer to the DER encoded signature
1440 * \param siglen length of the DER encoded signature
1441 * \param eckey EC_KEY object containing a public EC key
1442 * \return 1 if the signature is valid, 0 if the signature is invalid
1445 OSSL_DEPRECATEDIN_3_0 int ECDSA_verify(int type, const unsigned char *dgst,
1446 int dgstlen, const unsigned char *sig,
1447 int siglen, EC_KEY *eckey);
1449 /** Returns the maximum length of the DER encoded signature
1450 * \param eckey EC_KEY object
1451 * \return numbers of bytes required for the DER encoded signature
1453 OSSL_DEPRECATEDIN_3_0 int ECDSA_size(const EC_KEY *eckey);
1455 /********************************************************************/
1456 /* EC_KEY_METHOD constructors, destructors, writers and accessors */
1457 /********************************************************************/
1459 OSSL_DEPRECATEDIN_3_0 EC_KEY_METHOD *EC_KEY_METHOD_new(const EC_KEY_METHOD *meth);
1460 OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_free(EC_KEY_METHOD *meth);
1461 OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_set_init
1462 (EC_KEY_METHOD *meth,
1463 int (*init)(EC_KEY *key),
1464 void (*finish)(EC_KEY *key),
1465 int (*copy)(EC_KEY *dest, const EC_KEY *src),
1466 int (*set_group)(EC_KEY *key, const EC_GROUP *grp),
1467 int (*set_private)(EC_KEY *key, const BIGNUM *priv_key),
1468 int (*set_public)(EC_KEY *key, const EC_POINT *pub_key));
1470 OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_set_keygen(EC_KEY_METHOD *meth,
1471 int (*keygen)(EC_KEY *key));
1473 OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_set_compute_key
1474 (EC_KEY_METHOD *meth,
1475 int (*ckey)(unsigned char **psec, size_t *pseclen,
1476 const EC_POINT *pub_key, const EC_KEY *ecdh));
1478 OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_set_sign
1479 (EC_KEY_METHOD *meth,
1480 int (*sign)(int type, const unsigned char *dgst,
1481 int dlen, unsigned char *sig,
1482 unsigned int *siglen,
1483 const BIGNUM *kinv, const BIGNUM *r,
1485 int (*sign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
1486 BIGNUM **kinvp, BIGNUM **rp),
1487 ECDSA_SIG *(*sign_sig)(const unsigned char *dgst,
1489 const BIGNUM *in_kinv,
1493 OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_set_verify
1494 (EC_KEY_METHOD *meth,
1495 int (*verify)(int type, const unsigned
1496 char *dgst, int dgst_len,
1497 const unsigned char *sigbuf,
1498 int sig_len, EC_KEY *eckey),
1499 int (*verify_sig)(const unsigned char *dgst,
1500 int dgst_len, const ECDSA_SIG *sig,
1503 OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_get_init
1504 (const EC_KEY_METHOD *meth,
1505 int (**pinit)(EC_KEY *key),
1506 void (**pfinish)(EC_KEY *key),
1507 int (**pcopy)(EC_KEY *dest, const EC_KEY *src),
1508 int (**pset_group)(EC_KEY *key, const EC_GROUP *grp),
1509 int (**pset_private)(EC_KEY *key, const BIGNUM *priv_key),
1510 int (**pset_public)(EC_KEY *key, const EC_POINT *pub_key));
1512 OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_get_keygen
1513 (const EC_KEY_METHOD *meth, int (**pkeygen)(EC_KEY *key));
1515 OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_get_compute_key
1516 (const EC_KEY_METHOD *meth,
1517 int (**pck)(unsigned char **psec,
1519 const EC_POINT *pub_key,
1520 const EC_KEY *ecdh));
1522 OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_get_sign
1523 (const EC_KEY_METHOD *meth,
1524 int (**psign)(int type, const unsigned char *dgst,
1525 int dlen, unsigned char *sig,
1526 unsigned int *siglen,
1527 const BIGNUM *kinv, const BIGNUM *r,
1529 int (**psign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
1530 BIGNUM **kinvp, BIGNUM **rp),
1531 ECDSA_SIG *(**psign_sig)(const unsigned char *dgst,
1533 const BIGNUM *in_kinv,
1537 OSSL_DEPRECATEDIN_3_0 void EC_KEY_METHOD_get_verify
1538 (const EC_KEY_METHOD *meth,
1539 int (**pverify)(int type, const unsigned
1540 char *dgst, int dgst_len,
1541 const unsigned char *sigbuf,
1542 int sig_len, EC_KEY *eckey),
1543 int (**pverify_sig)(const unsigned char *dgst,
1545 const ECDSA_SIG *sig,
1547 # endif /* OPENSSL_NO_DEPRECATED_3_0 */
1549 # define EVP_EC_gen(curve) \
1550 EVP_PKEY_Q_keygen(NULL, NULL, "EC", (char *)(strstr(curve, "")))
1551 # define ECParameters_dup(x) ASN1_dup_of(EC_KEY, i2d_ECParameters, \
1552 d2i_ECParameters, x)
1554 # ifndef __cplusplus
1555 # if defined(__SUNPRO_C)
1556 # if __SUNPRO_C >= 0x520
1557 # pragma error_messages (default,E_ARRAY_OF_INCOMPLETE_NONAME,E_ARRAY_OF_INCOMPLETE)