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80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
/*
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* Copyright 2017-2019 The OpenSSL Project Authors. All Rights Reserved.
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* Copyright 2015 Cryptography Research, Inc.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*
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* Originally written by Mike Hamburg
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*/
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#ifndef OSSL_CRYPTO_EC_CURVE448UTILS_H
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# define OSSL_CRYPTO_EC_CURVE448UTILS_H
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# include <openssl/e_os2.h>
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/*
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* Internal word types. Somewhat tricky. This could be decided separately per
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* platform. However, the structs do need to be all the same size and
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* alignment on a given platform to support dynamic linking, since even if you
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* header was built with eg arch_neon, you might end up linking a library built
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* with arch_arm32.
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*/
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# ifndef C448_WORD_BITS
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# if (defined(__SIZEOF_INT128__) && (__SIZEOF_INT128__ == 16)) \
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&& !defined(__sparc__) \
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&& (!defined(__SIZEOF_LONG__) || (__SIZEOF_LONG__ == 8))
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# define C448_WORD_BITS 64 /* The number of bits in a word */
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# else
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# define C448_WORD_BITS 32 /* The number of bits in a word */
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# endif
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# endif
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# if C448_WORD_BITS == 64
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/* Word size for internal computations */
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typedef uint64_t c448_word_t;
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/* Signed word size for internal computations */
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typedef int64_t c448_sword_t;
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/* "Boolean" type, will be set to all-zero or all-one (i.e. -1u) */
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typedef uint64_t c448_bool_t;
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/* Double-word size for internal computations */
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typedef __uint128_t c448_dword_t;
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/* Signed double-word size for internal computations */
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typedef __int128_t c448_dsword_t;
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# elif C448_WORD_BITS == 32
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/* Word size for internal computations */
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typedef uint32_t c448_word_t;
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/* Signed word size for internal computations */
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typedef int32_t c448_sword_t;
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/* "Boolean" type, will be set to all-zero or all-one (i.e. -1u) */
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typedef uint32_t c448_bool_t;
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/* Double-word size for internal computations */
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typedef uint64_t c448_dword_t;
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/* Signed double-word size for internal computations */
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typedef int64_t c448_dsword_t;
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# else
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# error "Only supporting C448_WORD_BITS = 32 or 64 for now"
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# endif
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/* C448_TRUE = -1 so that C448_TRUE & x = x */
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# define C448_TRUE (0 - (c448_bool_t)1)
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/* C448_FALSE = 0 so that C448_FALSE & x = 0 */
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# define C448_FALSE 0
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/* Another boolean type used to indicate success or failure. */
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typedef enum {
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C448_SUCCESS = -1, /**< The operation succeeded. */
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C448_FAILURE = 0 /**< The operation failed. */
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} c448_error_t;
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/* Return success if x is true */
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static ossl_inline c448_error_t c448_succeed_if(c448_bool_t x)
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{
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return (c448_error_t) x;
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}
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#endif /* __C448_COMMON_H__ */
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