--- /dev/null
+/* Originally written by Bodo Moeller for the OpenSSL project.
+ * ====================================================================
+ * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+/* ====================================================================
+ * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
+ *
+ * Portions of the attached software ("Contribution") are developed by
+ * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
+ *
+ * The Contribution is licensed pursuant to the OpenSSL open source
+ * license provided above.
+ *
+ * The elliptic curve binary polynomial software is originally written by
+ * Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems
+ * Laboratories. */
+
+#ifndef OPENSSL_HEADER_EC_H
+#define OPENSSL_HEADER_EC_H
+
+#include <openssl/base.h>
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+
+// Low-level operations on elliptic curves.
+
+
+// point_conversion_form_t enumerates forms, as defined in X9.62 (ECDSA), for
+// the encoding of a elliptic curve point (x,y)
+typedef enum {
+ // POINT_CONVERSION_COMPRESSED indicates that the point is encoded as z||x,
+ // where the octet z specifies which solution of the quadratic equation y
+ // is.
+ POINT_CONVERSION_COMPRESSED = 2,
+
+ // POINT_CONVERSION_UNCOMPRESSED indicates that the point is encoded as
+ // z||x||y, where z is the octet 0x04.
+ POINT_CONVERSION_UNCOMPRESSED = 4,
+
+ // POINT_CONVERSION_HYBRID indicates that the point is encoded as z||x||y,
+ // where z specifies which solution of the quadratic equation y is. This is
+ // not supported by the code and has never been observed in use.
+ //
+ // TODO(agl): remove once node.js no longer references this.
+ POINT_CONVERSION_HYBRID = 6,
+} point_conversion_form_t;
+
+
+// Elliptic curve groups.
+
+// EC_GROUP_new_by_curve_name returns a fresh EC_GROUP object for the elliptic
+// curve specified by |nid|, or NULL on error.
+//
+// The supported NIDs are:
+// NID_secp224r1 (P-224),
+// NID_X9_62_prime256v1 (P-256),
+// NID_secp384r1 (P-384),
+// NID_secp521r1 (P-521)
+//
+// If in doubt, use |NID_X9_62_prime256v1|, or see the curve25519.h header for
+// more modern primitives.
+OPENSSL_EXPORT EC_GROUP *EC_GROUP_new_by_curve_name(int nid);
+
+// EC_GROUP_free frees |group| and the data that it points to.
+OPENSSL_EXPORT void EC_GROUP_free(EC_GROUP *group);
+
+// EC_GROUP_dup returns a fresh |EC_GROUP| which is equal to |a| or NULL on
+// error.
+OPENSSL_EXPORT EC_GROUP *EC_GROUP_dup(const EC_GROUP *a);
+
+// EC_GROUP_cmp returns zero if |a| and |b| are the same group and non-zero
+// otherwise.
+OPENSSL_EXPORT int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b,
+ BN_CTX *ignored);
+
+// EC_GROUP_get0_generator returns a pointer to the internal |EC_POINT| object
+// in |group| that specifies the generator for the group.
+OPENSSL_EXPORT const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group);
+
+// EC_GROUP_get0_order returns a pointer to the internal |BIGNUM| object in
+// |group| that specifies the order of the group.
+OPENSSL_EXPORT const BIGNUM *EC_GROUP_get0_order(const EC_GROUP *group);
+
+// EC_GROUP_get_cofactor sets |*cofactor| to the cofactor of |group| using
+// |ctx|, if it's not NULL. It returns one on success and zero otherwise.
+OPENSSL_EXPORT int EC_GROUP_get_cofactor(const EC_GROUP *group,
+ BIGNUM *cofactor, BN_CTX *ctx);
+
+// EC_GROUP_get_curve_GFp gets various parameters about a group. It sets
+// |*out_p| to the order of the coordinate field and |*out_a| and |*out_b| to
+// the parameters of the curve when expressed as y² = x³ + ax + b. Any of the
+// output parameters can be NULL. It returns one on success and zero on
+// error.
+OPENSSL_EXPORT int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *out_p,
+ BIGNUM *out_a, BIGNUM *out_b,
+ BN_CTX *ctx);
+
+// EC_GROUP_get_curve_name returns a NID that identifies |group|.
+OPENSSL_EXPORT int EC_GROUP_get_curve_name(const EC_GROUP *group);
+
+// EC_GROUP_get_degree returns the number of bits needed to represent an
+// element of the field underlying |group|.
+OPENSSL_EXPORT unsigned EC_GROUP_get_degree(const EC_GROUP *group);
+
+
+// Points on elliptic curves.
+
+// EC_POINT_new returns a fresh |EC_POINT| object in the given group, or NULL
+// on error.
+OPENSSL_EXPORT EC_POINT *EC_POINT_new(const EC_GROUP *group);
+
+// EC_POINT_free frees |point| and the data that it points to.
+OPENSSL_EXPORT void EC_POINT_free(EC_POINT *point);
+
+// EC_POINT_copy sets |*dest| equal to |*src|. It returns one on success and
+// zero otherwise.
+OPENSSL_EXPORT int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src);
+
+// EC_POINT_dup returns a fresh |EC_POINT| that contains the same values as
+// |src|, or NULL on error.
+OPENSSL_EXPORT EC_POINT *EC_POINT_dup(const EC_POINT *src,
+ const EC_GROUP *group);
+
+// EC_POINT_set_to_infinity sets |point| to be the "point at infinity" for the
+// given group.
+OPENSSL_EXPORT int EC_POINT_set_to_infinity(const EC_GROUP *group,
+ EC_POINT *point);
+
+// EC_POINT_is_at_infinity returns one iff |point| is the point at infinity and
+// zero otherwise.
+OPENSSL_EXPORT int EC_POINT_is_at_infinity(const EC_GROUP *group,
+ const EC_POINT *point);
+
+// EC_POINT_is_on_curve returns one if |point| is an element of |group| and
+// and zero otherwise or when an error occurs. This is different from OpenSSL,
+// which returns -1 on error. If |ctx| is non-NULL, it may be used.
+OPENSSL_EXPORT int EC_POINT_is_on_curve(const EC_GROUP *group,
+ const EC_POINT *point, BN_CTX *ctx);
+
+// EC_POINT_cmp returns zero if |a| is equal to |b|, greater than zero if
+// not equal and -1 on error. If |ctx| is not NULL, it may be used.
+OPENSSL_EXPORT int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a,
+ const EC_POINT *b, BN_CTX *ctx);
+
+// EC_POINT_make_affine converts |point| to affine form, internally. It returns
+// one on success and zero otherwise. If |ctx| is not NULL, it may be used.
+OPENSSL_EXPORT int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point,
+ BN_CTX *ctx);
+
+// EC_POINTs_make_affine converts |num| points from |points| to affine form,
+// internally. It returns one on success and zero otherwise. If |ctx| is not
+// NULL, it may be used.
+OPENSSL_EXPORT int EC_POINTs_make_affine(const EC_GROUP *group, size_t num,
+ EC_POINT *points[], BN_CTX *ctx);
+
+
+// Point conversion.
+
+// EC_POINT_get_affine_coordinates_GFp sets |x| and |y| to the affine value of
+// |point| using |ctx|, if it's not NULL. It returns one on success and zero
+// otherwise.
+//
+// Either |x| or |y| may be NULL to skip computing that coordinate. This is
+// slightly faster in the common case where only the x-coordinate is needed.
+OPENSSL_EXPORT int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group,
+ const EC_POINT *point,
+ BIGNUM *x, BIGNUM *y,
+ BN_CTX *ctx);
+
+// EC_POINT_set_affine_coordinates_GFp sets the value of |point| to be
+// (|x|, |y|). The |ctx| argument may be used if not NULL. It returns one
+// on success or zero on error. Note that, unlike with OpenSSL, it's
+// considered an error if the point is not on the curve.
+OPENSSL_EXPORT int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group,
+ EC_POINT *point,
+ const BIGNUM *x,
+ const BIGNUM *y,
+ BN_CTX *ctx);
+
+// EC_POINT_point2oct serialises |point| into the X9.62 form given by |form|
+// into, at most, |len| bytes at |buf|. It returns the number of bytes written
+// or zero on error if |buf| is non-NULL, else the number of bytes needed. The
+// |ctx| argument may be used if not NULL.
+OPENSSL_EXPORT size_t EC_POINT_point2oct(const EC_GROUP *group,
+ const EC_POINT *point,
+ point_conversion_form_t form,
+ uint8_t *buf, size_t len, BN_CTX *ctx);
+
+// EC_POINT_point2cbb behaves like |EC_POINT_point2oct| but appends the
+// serialised point to |cbb|. It returns one on success and zero on error.
+OPENSSL_EXPORT int EC_POINT_point2cbb(CBB *out, const EC_GROUP *group,
+ const EC_POINT *point,
+ point_conversion_form_t form,
+ BN_CTX *ctx);
+
+// EC_POINT_oct2point sets |point| from |len| bytes of X9.62 format
+// serialisation in |buf|. It returns one on success and zero otherwise. The
+// |ctx| argument may be used if not NULL.
+OPENSSL_EXPORT int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point,
+ const uint8_t *buf, size_t len,
+ BN_CTX *ctx);
+
+// EC_POINT_set_compressed_coordinates_GFp sets |point| to equal the point with
+// the given |x| coordinate and the y coordinate specified by |y_bit| (see
+// X9.62). It returns one on success and zero otherwise.
+OPENSSL_EXPORT int EC_POINT_set_compressed_coordinates_GFp(
+ const EC_GROUP *group, EC_POINT *point, const BIGNUM *x, int y_bit,
+ BN_CTX *ctx);
+
+
+// Group operations.
+
+// EC_POINT_add sets |r| equal to |a| plus |b|. It returns one on success and
+// zero otherwise. If |ctx| is not NULL, it may be used.
+OPENSSL_EXPORT int EC_POINT_add(const EC_GROUP *group, EC_POINT *r,
+ const EC_POINT *a, const EC_POINT *b,
+ BN_CTX *ctx);
+
+// EC_POINT_dbl sets |r| equal to |a| plus |a|. It returns one on success and
+// zero otherwise. If |ctx| is not NULL, it may be used.
+OPENSSL_EXPORT int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r,
+ const EC_POINT *a, BN_CTX *ctx);
+
+// EC_POINT_invert sets |a| equal to minus |a|. It returns one on success and
+// zero otherwise. If |ctx| is not NULL, it may be used.
+OPENSSL_EXPORT int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a,
+ BN_CTX *ctx);
+
+// EC_POINT_mul sets r = generator*n + q*m. It returns one on success and zero
+// otherwise. If |ctx| is not NULL, it may be used.
+OPENSSL_EXPORT int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r,
+ const BIGNUM *n, const EC_POINT *q,
+ const BIGNUM *m, BN_CTX *ctx);
+
+
+// Deprecated functions.
+
+// EC_GROUP_new_curve_GFp creates a new, arbitrary elliptic curve group based
+// on the equation y² = x³ + a·x + b. It returns the new group or NULL on
+// error.
+//
+// This new group has no generator. It is an error to use a generator-less group
+// with any functions except for |EC_GROUP_free|, |EC_POINT_new|,
+// |EC_POINT_set_affine_coordinates_GFp|, and |EC_GROUP_set_generator|.
+//
+// |EC_GROUP|s returned by this function will always compare as unequal via
+// |EC_GROUP_cmp| (even to themselves). |EC_GROUP_get_curve_name| will always
+// return |NID_undef|.
+//
+// Avoid using arbitrary curves and use |EC_GROUP_new_by_curve_name| instead.
+OPENSSL_EXPORT EC_GROUP *EC_GROUP_new_curve_GFp(const BIGNUM *p,
+ const BIGNUM *a,
+ const BIGNUM *b, BN_CTX *ctx);
+
+// EC_GROUP_set_generator sets the generator for |group| to |generator|, which
+// must have the given order and cofactor. It may only be used with |EC_GROUP|
+// objects returned by |EC_GROUP_new_curve_GFp| and may only be used once on
+// each group. |generator| must have been created using |group|.
+OPENSSL_EXPORT int EC_GROUP_set_generator(EC_GROUP *group,
+ const EC_POINT *generator,
+ const BIGNUM *order,
+ const BIGNUM *cofactor);
+
+// EC_GROUP_get_order sets |*order| to the order of |group|, if it's not
+// NULL. It returns one on success and zero otherwise. |ctx| is ignored. Use
+// |EC_GROUP_get0_order| instead.
+OPENSSL_EXPORT int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order,
+ BN_CTX *ctx);
+
+// EC_GROUP_set_asn1_flag does nothing.
+OPENSSL_EXPORT void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag);
+
+#define OPENSSL_EC_NAMED_CURVE 0
+
+typedef struct ec_method_st EC_METHOD;
+
+// EC_GROUP_method_of returns NULL.
+OPENSSL_EXPORT const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group);
+
+// EC_METHOD_get_field_type returns NID_X9_62_prime_field.
+OPENSSL_EXPORT int EC_METHOD_get_field_type(const EC_METHOD *meth);
+
+// EC_GROUP_set_point_conversion_form aborts the process if |form| is not
+// |POINT_CONVERSION_UNCOMPRESSED| and otherwise does nothing.
+OPENSSL_EXPORT void EC_GROUP_set_point_conversion_form(
+ EC_GROUP *group, point_conversion_form_t form);
+
+// EC_builtin_curve describes a supported elliptic curve.
+typedef struct {
+ int nid;
+ const char *comment;
+} EC_builtin_curve;
+
+// EC_get_builtin_curves writes at most |max_num_curves| elements to
+// |out_curves| and returns the total number that it would have written, had
+// |max_num_curves| been large enough.
+//
+// The |EC_builtin_curve| items describe the supported elliptic curves.
+OPENSSL_EXPORT size_t EC_get_builtin_curves(EC_builtin_curve *out_curves,
+ size_t max_num_curves);
+
+// EC_POINT_clear_free calls |EC_POINT_free|.
+OPENSSL_EXPORT void EC_POINT_clear_free(EC_POINT *point);
+
+// Old code expects to get EC_KEY from ec.h.
+#include <openssl/ec_key.h>
+
+
+#if defined(__cplusplus)
+} // extern C
+
+extern "C++" {
+
+namespace bssl {
+
+BORINGSSL_MAKE_DELETER(EC_POINT, EC_POINT_free)
+BORINGSSL_MAKE_DELETER(EC_GROUP, EC_GROUP_free)
+
+} // namespace bssl
+
+} // extern C++
+
+#endif
+
+#define EC_R_BUFFER_TOO_SMALL 100
+#define EC_R_COORDINATES_OUT_OF_RANGE 101
+#define EC_R_D2I_ECPKPARAMETERS_FAILURE 102
+#define EC_R_EC_GROUP_NEW_BY_NAME_FAILURE 103
+#define EC_R_GROUP2PKPARAMETERS_FAILURE 104
+#define EC_R_I2D_ECPKPARAMETERS_FAILURE 105
+#define EC_R_INCOMPATIBLE_OBJECTS 106
+#define EC_R_INVALID_COMPRESSED_POINT 107
+#define EC_R_INVALID_COMPRESSION_BIT 108
+#define EC_R_INVALID_ENCODING 109
+#define EC_R_INVALID_FIELD 110
+#define EC_R_INVALID_FORM 111
+#define EC_R_INVALID_GROUP_ORDER 112
+#define EC_R_INVALID_PRIVATE_KEY 113
+#define EC_R_MISSING_PARAMETERS 114
+#define EC_R_MISSING_PRIVATE_KEY 115
+#define EC_R_NON_NAMED_CURVE 116
+#define EC_R_NOT_INITIALIZED 117
+#define EC_R_PKPARAMETERS2GROUP_FAILURE 118
+#define EC_R_POINT_AT_INFINITY 119
+#define EC_R_POINT_IS_NOT_ON_CURVE 120
+#define EC_R_SLOT_FULL 121
+#define EC_R_UNDEFINED_GENERATOR 122
+#define EC_R_UNKNOWN_GROUP 123
+#define EC_R_UNKNOWN_ORDER 124
+#define EC_R_WRONG_ORDER 125
+#define EC_R_BIGNUM_OUT_OF_RANGE 126
+#define EC_R_WRONG_CURVE_PARAMETERS 127
+#define EC_R_DECODE_ERROR 128
+#define EC_R_ENCODE_ERROR 129
+#define EC_R_GROUP_MISMATCH 130
+#define EC_R_INVALID_COFACTOR 131
+#define EC_R_PUBLIC_KEY_VALIDATION_FAILED 132
+#define EC_R_INVALID_SCALAR 133
+
+#endif // OPENSSL_HEADER_EC_H
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