chore: checkpoint before Python removal

vendor/aws-lc-sys/aws-lc/crypto/ec_extra/internal.h

@@ -0,0 +1,76 @@
+// Copyright (c) 2020, Google Inc.
+// SPDX-License-Identifier: ISC
+
+#ifndef OPENSSL_HEADER_EC_EXTRA_INTERNAL_H
+#define OPENSSL_HEADER_EC_EXTRA_INTERNAL_H
+
+#include <openssl/ec.h>
+
+#include "../fipsmodule/ec/internal.h"
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+
+// Hash-to-curve.
+//
+// Internal |EC_JACOBIAN| versions of the corresponding public APIs.
+
+// ec_hash_to_curve_p256_xmd_sha256_sswu hashes |msg| to a point on |group| and
+// writes the result to |out|, implementing the P256_XMD:SHA-256_SSWU_RO_ suite
+// from RFC 9380. It returns one on success and zero on error.
+OPENSSL_EXPORT int ec_hash_to_curve_p256_xmd_sha256_sswu(
+    const EC_GROUP *group, EC_JACOBIAN *out, const uint8_t *dst, size_t dst_len,
+    const uint8_t *msg, size_t msg_len);
+
+// ec_hash_to_curve_p384_xmd_sha384_sswu hashes |msg| to a point on |group| and
+// writes the result to |out|, implementing the P384_XMD:SHA-384_SSWU_RO_ suite
+// from RFC 9380. It returns one on success and zero on error.
+OPENSSL_EXPORT int ec_hash_to_curve_p384_xmd_sha384_sswu(
+    const EC_GROUP *group, EC_JACOBIAN *out, const uint8_t *dst, size_t dst_len,
+    const uint8_t *msg, size_t msg_len);
+
+// ec_hash_to_scalar_p384_xmd_sha384 hashes |msg| to a scalar on |group|
+// and writes the result to |out|, using the hash_to_field operation from the
+// P384_XMD:SHA-384_SSWU_RO_ suite from RFC 9380, but generating a value modulo
+// the group order rather than a field element.
+OPENSSL_EXPORT int ec_hash_to_scalar_p384_xmd_sha384(
+    const EC_GROUP *group, EC_SCALAR *out, const uint8_t *dst, size_t dst_len,
+    const uint8_t *msg, size_t msg_len);
+
+// ec_hash_to_curve_p384_xmd_sha512_sswu_draft07 hashes |msg| to a point on
+// |group| and writes the result to |out|, implementing the
+// P384_XMD:SHA-512_SSWU_RO_ suite from draft-irtf-cfrg-hash-to-curve-07. It
+// returns one on success and zero on error.
+//
+// TODO(https://crbug.com/1414562): Migrate this to the final version.
+OPENSSL_EXPORT int ec_hash_to_curve_p384_xmd_sha512_sswu_draft07(
+    const EC_GROUP *group, EC_JACOBIAN *out, const uint8_t *dst, size_t dst_len,
+    const uint8_t *msg, size_t msg_len);
+
+// ec_hash_to_scalar_p384_xmd_sha512_draft07 hashes |msg| to a scalar on |group|
+// and writes the result to |out|, using the hash_to_field operation from the
+// P384_XMD:SHA-512_SSWU_RO_ suite from draft-irtf-cfrg-hash-to-curve-07, but
+// generating a value modulo the group order rather than a field element.
+//
+// TODO(https://crbug.com/1414562): Migrate this to the final version.
+OPENSSL_EXPORT int ec_hash_to_scalar_p384_xmd_sha512_draft07(
+    const EC_GROUP *group, EC_SCALAR *out, const uint8_t *dst, size_t dst_len,
+    const uint8_t *msg, size_t msg_len);
+
+enum ECParametersType {
+  UNKNOWN_EC_PARAMETERS = 0,
+  NAMED_CURVE_EC_PARAMETERS = 1,
+  SPECIFIED_CURVE_EC_PARAMETERS = 2,
+};
+
+// EC_KEY_parse_parameters_and_type parses the elliptic curve key parameters from |cbs| and
+// sets the type of parameters found on |paramType|.
+EC_GROUP *EC_KEY_parse_parameters_and_type(CBS *cbs, enum ECParametersType *paramType);
+
+#if defined(__cplusplus)
+}  // extern C
+#endif
+
+#endif  // OPENSSL_HEADER_EC_EXTRA_INTERNAL_H