77 lines
3.1 KiB
C
77 lines
3.1 KiB
C
// Copyright (c) 2020, Google Inc.
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// SPDX-License-Identifier: ISC
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#ifndef OPENSSL_HEADER_EC_EXTRA_INTERNAL_H
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#define OPENSSL_HEADER_EC_EXTRA_INTERNAL_H
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#include <openssl/ec.h>
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#include "../fipsmodule/ec/internal.h"
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#if defined(__cplusplus)
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extern "C" {
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#endif
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// Hash-to-curve.
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//
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// Internal |EC_JACOBIAN| versions of the corresponding public APIs.
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// ec_hash_to_curve_p256_xmd_sha256_sswu hashes |msg| to a point on |group| and
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// writes the result to |out|, implementing the P256_XMD:SHA-256_SSWU_RO_ suite
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// from RFC 9380. It returns one on success and zero on error.
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OPENSSL_EXPORT int ec_hash_to_curve_p256_xmd_sha256_sswu(
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const EC_GROUP *group, EC_JACOBIAN *out, const uint8_t *dst, size_t dst_len,
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const uint8_t *msg, size_t msg_len);
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// ec_hash_to_curve_p384_xmd_sha384_sswu hashes |msg| to a point on |group| and
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// writes the result to |out|, implementing the P384_XMD:SHA-384_SSWU_RO_ suite
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// from RFC 9380. It returns one on success and zero on error.
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OPENSSL_EXPORT int ec_hash_to_curve_p384_xmd_sha384_sswu(
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const EC_GROUP *group, EC_JACOBIAN *out, const uint8_t *dst, size_t dst_len,
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const uint8_t *msg, size_t msg_len);
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// ec_hash_to_scalar_p384_xmd_sha384 hashes |msg| to a scalar on |group|
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// and writes the result to |out|, using the hash_to_field operation from the
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// P384_XMD:SHA-384_SSWU_RO_ suite from RFC 9380, but generating a value modulo
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// the group order rather than a field element.
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OPENSSL_EXPORT int ec_hash_to_scalar_p384_xmd_sha384(
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const EC_GROUP *group, EC_SCALAR *out, const uint8_t *dst, size_t dst_len,
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const uint8_t *msg, size_t msg_len);
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// ec_hash_to_curve_p384_xmd_sha512_sswu_draft07 hashes |msg| to a point on
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// |group| and writes the result to |out|, implementing the
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// P384_XMD:SHA-512_SSWU_RO_ suite from draft-irtf-cfrg-hash-to-curve-07. It
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// returns one on success and zero on error.
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//
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// TODO(https://crbug.com/1414562): Migrate this to the final version.
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OPENSSL_EXPORT int ec_hash_to_curve_p384_xmd_sha512_sswu_draft07(
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const EC_GROUP *group, EC_JACOBIAN *out, const uint8_t *dst, size_t dst_len,
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const uint8_t *msg, size_t msg_len);
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// ec_hash_to_scalar_p384_xmd_sha512_draft07 hashes |msg| to a scalar on |group|
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// and writes the result to |out|, using the hash_to_field operation from the
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// P384_XMD:SHA-512_SSWU_RO_ suite from draft-irtf-cfrg-hash-to-curve-07, but
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// generating a value modulo the group order rather than a field element.
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//
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// TODO(https://crbug.com/1414562): Migrate this to the final version.
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OPENSSL_EXPORT int ec_hash_to_scalar_p384_xmd_sha512_draft07(
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const EC_GROUP *group, EC_SCALAR *out, const uint8_t *dst, size_t dst_len,
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const uint8_t *msg, size_t msg_len);
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enum ECParametersType {
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UNKNOWN_EC_PARAMETERS = 0,
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NAMED_CURVE_EC_PARAMETERS = 1,
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SPECIFIED_CURVE_EC_PARAMETERS = 2,
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};
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// EC_KEY_parse_parameters_and_type parses the elliptic curve key parameters from |cbs| and
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// sets the type of parameters found on |paramType|.
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EC_GROUP *EC_KEY_parse_parameters_and_type(CBS *cbs, enum ECParametersType *paramType);
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#if defined(__cplusplus)
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} // extern C
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#endif
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#endif // OPENSSL_HEADER_EC_EXTRA_INTERNAL_H
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