| 1 | /*
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| 2 | * Copyright 2017-2021 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | * Copyright 2015 Cryptography Research, Inc.
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| 4 | *
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| 5 | * Licensed under the Apache License 2.0 (the "License"). You may not use
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| 6 | * this file except in compliance with the License. You can obtain a copy
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| 7 | * in the file LICENSE in the source distribution or at
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| 8 | * https://www.openssl.org/source/license.html
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| 9 | *
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| 10 | * Originally written by Mike Hamburg
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| 11 | */
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| 12 |
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| 13 | #ifndef OSSL_CRYPTO_EC_CURVE448UTILS_H
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| 14 | # define OSSL_CRYPTO_EC_CURVE448UTILS_H
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| 15 |
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| 16 | # include <openssl/e_os2.h>
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| 17 |
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| 18 | # include "internal/numbers.h"
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| 19 |
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| 20 | /*
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| 21 | * Internal word types. Somewhat tricky. This could be decided separately per
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| 22 | * platform. However, the structs do need to be all the same size and
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| 23 | * alignment on a given platform to support dynamic linking, since even if you
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| 24 | * header was built with eg arch_neon, you might end up linking a library built
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| 25 | * with arch_arm32.
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| 26 | */
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| 27 | # ifndef C448_WORD_BITS
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| 28 | # if (defined(__SIZEOF_INT128__) && (__SIZEOF_INT128__ == 16)) \
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| 29 | && !defined(__sparc__) \
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| 30 | && (!defined(__SIZEOF_LONG__) || (__SIZEOF_LONG__ == 8))
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| 31 |
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| 32 | # define C448_WORD_BITS 64 /* The number of bits in a word */
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| 33 | # else
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| 34 | # define C448_WORD_BITS 32 /* The number of bits in a word */
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| 35 | # endif
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| 36 | # endif
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| 37 |
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| 38 | # if C448_WORD_BITS == 64
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| 39 | /* Word size for internal computations */
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| 40 | typedef uint64_t c448_word_t;
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| 41 | /* Signed word size for internal computations */
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| 42 | typedef int64_t c448_sword_t;
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| 43 | /* "Boolean" type, will be set to all-zero or all-one (i.e. -1u) */
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| 44 | typedef uint64_t c448_bool_t;
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| 45 | /* Double-word size for internal computations */
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| 46 | typedef uint128_t c448_dword_t;
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| 47 | /* Signed double-word size for internal computations */
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| 48 | typedef int128_t c448_dsword_t;
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| 49 | # elif C448_WORD_BITS == 32
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| 50 | /* Word size for internal computations */
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| 51 | typedef uint32_t c448_word_t;
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| 52 | /* Signed word size for internal computations */
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| 53 | typedef int32_t c448_sword_t;
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| 54 | /* "Boolean" type, will be set to all-zero or all-one (i.e. -1u) */
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| 55 | typedef uint32_t c448_bool_t;
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| 56 | /* Double-word size for internal computations */
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| 57 | typedef uint64_t c448_dword_t;
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| 58 | /* Signed double-word size for internal computations */
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| 59 | typedef int64_t c448_dsword_t;
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| 60 | # else
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| 61 | # error "Only supporting C448_WORD_BITS = 32 or 64 for now"
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| 62 | # endif
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| 63 |
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| 64 | /* C448_TRUE = -1 so that C448_TRUE & x = x */
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| 65 | # define C448_TRUE (0 - (c448_bool_t)1)
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| 66 |
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| 67 | /* C448_FALSE = 0 so that C448_FALSE & x = 0 */
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| 68 | # define C448_FALSE 0
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| 69 |
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| 70 | /* Another boolean type used to indicate success or failure. */
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| 71 | typedef enum {
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| 72 | C448_SUCCESS = -1, /**< The operation succeeded. */
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| 73 | C448_FAILURE = 0 /**< The operation failed. */
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| 74 | } c448_error_t;
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| 75 |
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| 76 | /* Return success if x is true */
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| 77 | static ossl_inline c448_error_t c448_succeed_if(c448_bool_t x)
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| 78 | {
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| 79 | return (c448_error_t) x;
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| 80 | }
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| 81 |
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| 82 | #endif /* __C448_COMMON_H__ */
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