1 /* 2 * Copyright 2017-2021 The OpenSSL Project Authors. All Rights Reserved. 3 * Copyright 2015 Cryptography Research, Inc. 4 * 5 * Licensed under the Apache License 2.0 (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 #include "internal/numbers.h" 19 20 /* 21 * Internal word types. Somewhat tricky. This could be decided separately per 22 * platform. However, the structs do need to be all the same size and 23 * alignment on a given platform to support dynamic linking, since even if you 24 * header was built with eg arch_neon, you might end up linking a library built 25 * with arch_arm32. 26 */ 27 #ifndef C448_WORD_BITS 28 #if (defined(__SIZEOF_INT128__) && (__SIZEOF_INT128__ == 16)) \ 29 && !defined(__sparc__) \ 30 && (!defined(__SIZEOF_LONG__) || (__SIZEOF_LONG__ == 8)) 31 32 #define C448_WORD_BITS 64 /* The number of bits in a word */ 33 #else 34 #define C448_WORD_BITS 32 /* The number of bits in a word */ 35 #endif 36 #endif 37 38 #if C448_WORD_BITS == 64 39 /* Word size for internal computations */ 40 typedef uint64_t c448_word_t; 41 /* Signed word size for internal computations */ 42 typedef int64_t c448_sword_t; 43 /* "Boolean" type, will be set to all-zero or all-one (i.e. -1u) */ 44 typedef uint64_t c448_bool_t; 45 /* Double-word size for internal computations */ 46 typedef uint128_t c448_dword_t; 47 /* Signed double-word size for internal computations */ 48 typedef int128_t c448_dsword_t; 49 #elif C448_WORD_BITS == 32 50 /* Word size for internal computations */ 51 typedef uint32_t c448_word_t; 52 /* Signed word size for internal computations */ 53 typedef int32_t c448_sword_t; 54 /* "Boolean" type, will be set to all-zero or all-one (i.e. -1u) */ 55 typedef uint32_t c448_bool_t; 56 /* Double-word size for internal computations */ 57 typedef uint64_t c448_dword_t; 58 /* Signed double-word size for internal computations */ 59 typedef int64_t c448_dsword_t; 60 #else 61 #error "Only supporting C448_WORD_BITS = 32 or 64 for now" 62 #endif 63 64 /* C448_TRUE = -1 so that C448_TRUE & x = x */ 65 #define C448_TRUE (0 - (c448_bool_t)1) 66 67 /* C448_FALSE = 0 so that C448_FALSE & x = 0 */ 68 #define C448_FALSE 0 69 70 /* Another boolean type used to indicate success or failure. */ 71 typedef enum { 72 C448_SUCCESS = -1, /**< The operation succeeded. */ 73 C448_FAILURE = 0 /**< The operation failed. */ 74 } c448_error_t; 75 76 /* Return success if x is true */ c448_succeed_if(c448_bool_t x)77static ossl_inline c448_error_t c448_succeed_if(c448_bool_t x) 78 { 79 return (c448_error_t)x; 80 } 81 82 #endif /* __C448_COMMON_H__ */ 83