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/*
* Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.
* Copyright 2015 Cryptography Research, Inc.
*
* 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
*
* Originally written by Mike Hamburg
*/
#ifndef HEADER_CURVE448UTILS_H
# define HEADER_CURVE448UTILS_H
# include <openssl/e_os2.h>
/*
* Internal word types. Somewhat tricky. This could be decided separately per
* platform. However, the structs do need to be all the same size and
* alignment on a given platform to support dynamic linking, since even if you
* header was built with eg arch_neon, you might end up linking a library built
* with arch_arm32.
*/
# ifndef C448_WORD_BITS
# if (defined(__SIZEOF_INT128__) && (__SIZEOF_INT128__ == 16)) \
&& !defined(__sparc__)
# define C448_WORD_BITS 64 /* The number of bits in a word */
# else
# define C448_WORD_BITS 32 /* The number of bits in a word */
# endif
# endif
# if C448_WORD_BITS == 64
/* Word size for internal computations */
typedef uint64_t c448_word_t;
/* Signed word size for internal computations */
typedef int64_t c448_sword_t;
/* "Boolean" type, will be set to all-zero or all-one (i.e. -1u) */
typedef uint64_t c448_bool_t;
/* Double-word size for internal computations */
typedef __uint128_t c448_dword_t;
/* Signed double-word size for internal computations */
typedef __int128_t c448_dsword_t;
# elif C448_WORD_BITS == 32
/* Word size for internal computations */
typedef uint32_t c448_word_t;
/* Signed word size for internal computations */
typedef int32_t c448_sword_t;
/* "Boolean" type, will be set to all-zero or all-one (i.e. -1u) */
typedef uint32_t c448_bool_t;
/* Double-word size for internal computations */
typedef uint64_t c448_dword_t;
/* Signed double-word size for internal computations */
typedef int64_t c448_dsword_t;
# else
# error "Only supporting C448_WORD_BITS = 32 or 64 for now"
# endif
/* C448_TRUE = -1 so that C448_TRUE & x = x */
# define C448_TRUE (0 - (c448_bool_t)1)
/* C448_FALSE = 0 so that C448_FALSE & x = 0 */
# define C448_FALSE 0
/* Another boolean type used to indicate success or failure. */
typedef enum {
C448_SUCCESS = -1, /**< The operation succeeded. */
C448_FAILURE = 0 /**< The operation failed. */
} c448_error_t;
/* Return success if x is true */
static ossl_inline c448_error_t c448_succeed_if(c448_bool_t x)
{
return (c448_error_t) x;
}
#endif /* __C448_COMMON_H__ */
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