| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2017-2019 The OpenSSL Project Authors. All Rights Reserved. |
| 3 | * Copyright 2015 Cryptography Research, Inc. |
| 4 | * |
| 5 | * Licensed under the OpenSSL license (the "License"). You may not use |
| 6 | * this file except in compliance with the License. You can obtain a copy |
| 7 | * in the file LICENSE in the source distribution or at |
| 8 | * https://www.openssl.org/source/license.html |
| 9 | * |
| 10 | * Originally written by Mike Hamburg |
| 11 | */ |
| 12 | |
| 13 | #ifndef OSSL_CRYPTO_EC_CURVE448UTILS_H |
| 14 | # define OSSL_CRYPTO_EC_CURVE448UTILS_H |
| 15 | |
| 16 | # include <openssl/e_os2.h> |
| 17 | |
| 18 | /* |
| 19 | * Internal word types. Somewhat tricky. This could be decided separately per |
| 20 | * platform. However, the structs do need to be all the same size and |
| 21 | * alignment on a given platform to support dynamic linking, since even if you |
| 22 | * header was built with eg arch_neon, you might end up linking a library built |
| 23 | * with arch_arm32. |
| 24 | */ |
| 25 | # ifndef C448_WORD_BITS |
| 26 | # if (defined(__SIZEOF_INT128__) && (__SIZEOF_INT128__ == 16)) \ |
| 27 | && !defined(__sparc__) \ |
| 28 | && (!defined(__SIZEOF_LONG__) || (__SIZEOF_LONG__ == 8)) |
| 29 | |
| 30 | # define C448_WORD_BITS 64 /* The number of bits in a word */ |
| 31 | # else |
| 32 | # define C448_WORD_BITS 32 /* The number of bits in a word */ |
| 33 | # endif |
| 34 | # endif |
| 35 | |
| 36 | # if C448_WORD_BITS == 64 |
| 37 | /* Word size for internal computations */ |
| 38 | typedef uint64_t c448_word_t; |
| 39 | /* Signed word size for internal computations */ |
| 40 | typedef int64_t c448_sword_t; |
| 41 | /* "Boolean" type, will be set to all-zero or all-one (i.e. -1u) */ |
| 42 | typedef uint64_t c448_bool_t; |
| 43 | /* Double-word size for internal computations */ |
| 44 | typedef __uint128_t c448_dword_t; |
| 45 | /* Signed double-word size for internal computations */ |
| 46 | typedef __int128_t c448_dsword_t; |
| 47 | # elif C448_WORD_BITS == 32 |
| 48 | /* Word size for internal computations */ |
| 49 | typedef uint32_t c448_word_t; |
| 50 | /* Signed word size for internal computations */ |
| 51 | typedef int32_t c448_sword_t; |
| 52 | /* "Boolean" type, will be set to all-zero or all-one (i.e. -1u) */ |
| 53 | typedef uint32_t c448_bool_t; |
| 54 | /* Double-word size for internal computations */ |
| 55 | typedef uint64_t c448_dword_t; |
| 56 | /* Signed double-word size for internal computations */ |
| 57 | typedef int64_t c448_dsword_t; |
| 58 | # else |
| 59 | # error "Only supporting C448_WORD_BITS = 32 or 64 for now" |
| 60 | # endif |
| 61 | |
| 62 | /* C448_TRUE = -1 so that C448_TRUE & x = x */ |
| 63 | # define C448_TRUE (0 - (c448_bool_t)1) |
| 64 | |
| 65 | /* C448_FALSE = 0 so that C448_FALSE & x = 0 */ |
| 66 | # define C448_FALSE 0 |
| 67 | |
| 68 | /* Another boolean type used to indicate success or failure. */ |
| 69 | typedef enum { |
| 70 | C448_SUCCESS = -1, /**< The operation succeeded. */ |
| 71 | C448_FAILURE = 0 /**< The operation failed. */ |
| 72 | } c448_error_t; |
| 73 | |
| 74 | /* Return success if x is true */ |
| 75 | static ossl_inline c448_error_t c448_succeed_if(c448_bool_t x) |
| 76 | { |
| 77 | return (c448_error_t) x; |
| 78 | } |
| 79 | |
| 80 | #endif /* __C448_COMMON_H__ */ |