-/**
- * @file decaf/point_448.h
- * @author Mike Hamburg
- *
- * @copyright
- * Copyright (c) 2015-2016 Cryptography Research, Inc. \n
- * Released under the MIT License. See LICENSE.txt for license information.
+/*
+ * Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2015-2016 Cryptography Research, Inc.
*
- * @brief A group of prime order p, based on Ed448-Goldilocks.
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*
- * @warning This file was automatically generated in Python.
- * Please do not edit it.
+ * Originally written by Mike Hamburg
*/
#ifndef __DECAF_POINT_448_H__
-#define __DECAF_POINT_448_H__ 1
+# define __DECAF_POINT_448_H__ 1
-#include "curve448utils.h"
-#include "field.h"
+# include "curve448utils.h"
+# include "field.h"
#ifdef __cplusplus
extern "C" {
#endif
/** @cond internal */
-#define DECAF_448_SCALAR_LIMBS ((446-1)/DECAF_WORD_BITS+1)
+# define DECAF_448_SCALAR_LIMBS ((446-1)/DECAF_WORD_BITS+1)
/** @endcond */
/** The number of bits in a scalar */
-#define DECAF_448_SCALAR_BITS 446
+# define DECAF_448_SCALAR_BITS 446
/** Number of bytes in a serialized point. */
-#define DECAF_448_SER_BYTES 56
+# define DECAF_448_SER_BYTES 56
/** Number of bytes in an elligated point. For now set the same as SER_BYTES
* but could be different for other curves.
*/
-#define DECAF_448_HASH_BYTES 56
+# define DECAF_448_HASH_BYTES 56
/** Number of bytes in a serialized scalar. */
-#define DECAF_448_SCALAR_BYTES 56
+# define DECAF_448_SCALAR_BYTES 56
/** Number of bits in the "which" field of an elligator inverse */
-#define DECAF_448_INVERT_ELLIGATOR_WHICH_BITS 3
+# define DECAF_448_INVERT_ELLIGATOR_WHICH_BITS 3
/** The cofactor the curve would have, if we hadn't removed it */
-#define DECAF_448_REMOVED_COFACTOR 4
+# define DECAF_448_REMOVED_COFACTOR 4
/** X448 encoding ratio. */
-#define DECAF_X448_ENCODE_RATIO 2
+# define DECAF_X448_ENCODE_RATIO 2
/** Number of bytes in an x448 public key */
-#define DECAF_X448_PUBLIC_BYTES 56
+# define DECAF_X448_PUBLIC_BYTES 56
/** Number of bytes in an x448 private key */
-#define DECAF_X448_PRIVATE_BYTES 56
+# define DECAF_X448_PRIVATE_BYTES 56
/** Twisted Edwards extended homogeneous coordinates */
typedef struct curve448_point_s {
/** @cond internal */
- gf_448_t x,y,z,t;
+ gf_448_t x, y, z, t;
/** @endcond */
} curve448_point_t[1];
struct curve448_precomputed_s;
/** Precomputed table based on a point. Can be trivial implementation. */
-typedef struct curve448_precomputed_s curve448_precomputed_s;
+typedef struct curve448_precomputed_s curve448_precomputed_s;
/** Scalar is stored packed, because we don't need the speed. */
typedef struct curve448_scalar_s {
* @retval DECAF_FAILURE The scalar was greater than the modulus,
* and has been reduced modulo that modulus.
*/
-__owur decaf_error_t curve448_scalar_decode (
- curve448_scalar_t out,
- const unsigned char ser[DECAF_448_SCALAR_BYTES]
-);
+__owur decaf_error_t curve448_scalar_decode(curve448_scalar_t out,
+ const unsigned char
+ ser[DECAF_448_SCALAR_BYTES]
+ );
/**
* @brief Read a scalar from wire format or from bytes. Reduces mod
* @param [in] ser_len Length of serialized form.
* @param [out] out Deserialized form.
*/
-void curve448_scalar_decode_long (
- curve448_scalar_t out,
- const unsigned char *ser,
- size_t ser_len
-);
-
+void curve448_scalar_decode_long(curve448_scalar_t out,
+ const unsigned char *ser, size_t ser_len);
+
/**
* @brief Serialize a scalar to wire format.
*
* @param [out] ser Serialized form of a scalar.
* @param [in] s Deserialized scalar.
*/
-void curve448_scalar_encode (
- unsigned char ser[DECAF_448_SCALAR_BYTES],
- const curve448_scalar_t s
-);
-
+void curve448_scalar_encode(unsigned char ser[DECAF_448_SCALAR_BYTES],
+ const curve448_scalar_t s);
+
/**
* @brief Add two scalars. The scalars may use the same memory.
* @param [in] a One scalar.
* @param [in] b Another scalar.
* @param [out] out a+b.
*/
-void curve448_scalar_add (
- curve448_scalar_t out,
- const curve448_scalar_t a,
- const curve448_scalar_t b
-);
+void curve448_scalar_add(curve448_scalar_t out,
+ const curve448_scalar_t a, const curve448_scalar_t b);
/**
* @brief Subtract two scalars. The scalars may use the same memory.
* @param [in] a One scalar.
* @param [in] b Another scalar.
* @param [out] out a-b.
- */
-void curve448_scalar_sub (
- curve448_scalar_t out,
- const curve448_scalar_t a,
- const curve448_scalar_t b
-);
+ */
+void curve448_scalar_sub(curve448_scalar_t out,
+ const curve448_scalar_t a, const curve448_scalar_t b);
/**
* @brief Multiply two scalars. The scalars may use the same memory.
* @param [in] a One scalar.
* @param [in] b Another scalar.
* @param [out] out a*b.
- */
-void curve448_scalar_mul (
- curve448_scalar_t out,
- const curve448_scalar_t a,
- const curve448_scalar_t b
-);
-
+ */
+void curve448_scalar_mul(curve448_scalar_t out,
+ const curve448_scalar_t a, const curve448_scalar_t b);
+
/**
* @brief Halve a scalar. The scalars may use the same memory.
* @param [in] a A scalar.
* @param [out] out a/2.
*/
-void curve448_scalar_halve (
- curve448_scalar_t out,
- const curve448_scalar_t a
-);
+void curve448_scalar_halve(curve448_scalar_t out, const curve448_scalar_t a);
/**
* @brief Copy a scalar. The scalars may use the same memory, in which
* @param [in] a A scalar.
* @param [out] out Will become a copy of a.
*/
-static inline void curve448_scalar_copy (
- curve448_scalar_t out,
- const curve448_scalar_t a
-) {
+static ossl_inline void curve448_scalar_copy(curve448_scalar_t out,
+ const curve448_scalar_t a)
+{
*out = *a;
}
* @param [out] a A copy of the point.
* @param [in] b Any point.
*/
-static inline void curve448_point_copy (
- curve448_point_t a,
- const curve448_point_t b
-) {
- *a=*b;
+static ossl_inline void curve448_point_copy(curve448_point_t a,
+ const curve448_point_t b)
+{
+ *a = *b;
}
/**
* @retval DECAF_TRUE The points are equal.
* @retval DECAF_FALSE The points are not equal.
*/
-__owur decaf_bool_t curve448_point_eq (
- const curve448_point_t a,
- const curve448_point_t b
-);
+__owur decaf_bool_t curve448_point_eq(const curve448_point_t a,
+ const curve448_point_t b);
/**
* @brief Double a point. Equivalent to
* @param [out] two_a The sum a+a.
* @param [in] a A point.
*/
-void curve448_point_double (
- curve448_point_t two_a,
- const curve448_point_t a
-);
+void curve448_point_double(curve448_point_t two_a, const curve448_point_t a);
/**
* @brief RFC 7748 Diffie-Hellman scalarmul. This function uses a different
* @retval DECAF_FAILURE The scalarmul didn't succeed, because the base
* point is in a small subgroup.
*/
-__owur decaf_error_t decaf_x448 (
- uint8_t out[DECAF_X448_PUBLIC_BYTES],
- const uint8_t base[DECAF_X448_PUBLIC_BYTES],
- const uint8_t scalar[DECAF_X448_PRIVATE_BYTES]
-);
+__owur decaf_error_t decaf_x448(uint8_t out[DECAF_X448_PUBLIC_BYTES],
+ const uint8_t base[DECAF_X448_PUBLIC_BYTES],
+ const uint8_t scalar[DECAF_X448_PRIVATE_BYTES]
+ );
/**
* @brief Multiply a point by DECAF_X448_ENCODE_RATIO,
* @param [out] out The scaled and encoded point.
* @param [in] p The point to be scaled and encoded.
*/
-void curve448_point_mul_by_ratio_and_encode_like_x448 (
- uint8_t out[DECAF_X448_PUBLIC_BYTES],
- const curve448_point_t p
-);
+void curve448_point_mul_by_ratio_and_encode_like_x448(uint8_t
+ out
+ [DECAF_X448_PUBLIC_BYTES],
+ const curve448_point_t p);
/** The base point for X448 Diffie-Hellman */
extern const uint8_t decaf_x448_base_point[DECAF_X448_PUBLIC_BYTES];
-
+
/**
* @brief RFC 7748 Diffie-Hellman base point scalarmul. This function uses
* a different (non-Decaf) encoding.
* @param [out] scaled The scaled point base*scalar
* @param [in] scalar The scalar to multiply by.
*/
-void decaf_x448_derive_public_key (
- uint8_t out[DECAF_X448_PUBLIC_BYTES],
- const uint8_t scalar[DECAF_X448_PRIVATE_BYTES]
-);
-
+void decaf_x448_derive_public_key(uint8_t out[DECAF_X448_PUBLIC_BYTES],
+ const uint8_t scalar[DECAF_X448_PRIVATE_BYTES]
+ );
/**
* @brief Multiply a precomputed base point by a scalar:
* @param [in] base The point to be scaled.
* @param [in] scalar The scalar to multiply by.
*/
-void curve448_precomputed_scalarmul (
- curve448_point_t scaled,
- const curve448_precomputed_s *base,
- const curve448_scalar_t scalar
-);
-
+void curve448_precomputed_scalarmul(curve448_point_t scaled,
+ const curve448_precomputed_s * base,
+ const curve448_scalar_t scalar);
/**
* @brief Multiply two base points by two scalars:
* @warning: This function takes variable time, and may leak the scalars
* used. It is designed for signature verification.
*/
-void curve448_base_double_scalarmul_non_secret (
- curve448_point_t combo,
- const curve448_scalar_t scalar1,
- const curve448_point_t base2,
- const curve448_scalar_t scalar2
-);
+void curve448_base_double_scalarmul_non_secret(curve448_point_t combo,
+ const curve448_scalar_t scalar1,
+ const curve448_point_t base2,
+ const curve448_scalar_t scalar2);
/**
* @brief Test that a point is valid, for debugging purposes.
* @retval DECAF_TRUE The point is valid.
* @retval DECAF_FALSE The point is invalid.
*/
-__owur decaf_bool_t curve448_point_valid (
- const curve448_point_t to_test
-);
+__owur decaf_bool_t curve448_point_valid(const curve448_point_t to_test);
/**
* @brief Overwrite scalar with zeros.
*/
-void curve448_scalar_destroy (
- curve448_scalar_t scalar
-);
+void curve448_scalar_destroy(curve448_scalar_t scalar);
/**
* @brief Overwrite point with zeros.
*/
-void curve448_point_destroy (
- curve448_point_t point
-);
+void curve448_point_destroy(curve448_point_t point);
#ifdef __cplusplus
} /* extern "C" */
#endif
-#endif /* __DECAF_POINT_448_H__ */
+#endif /* __DECAF_POINT_448_H__ */
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