1 /* 2 * Copyright 2017-2018 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 HEADER_CURVE448UTILS_H 14 # define HEADER_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 # define C448_WORD_BITS 64 /* The number of bits in a word */ 29 # else 30 # define C448_WORD_BITS 32 /* The number of bits in a word */ 31 # endif 32 # endif 33 34 # if C448_WORD_BITS == 64 35 /* Word size for internal computations */ 36 typedef uint64_t c448_word_t; 37 /* Signed word size for internal computations */ 38 typedef int64_t c448_sword_t; 39 /* "Boolean" type, will be set to all-zero or all-one (i.e. -1u) */ 40 typedef uint64_t c448_bool_t; 41 /* Double-word size for internal computations */ 42 typedef __uint128_t c448_dword_t; 43 /* Signed double-word size for internal computations */ 44 typedef __int128_t c448_dsword_t; 45 # elif C448_WORD_BITS == 32 46 /* Word size for internal computations */ 47 typedef uint32_t c448_word_t; 48 /* Signed word size for internal computations */ 49 typedef int32_t c448_sword_t; 50 /* "Boolean" type, will be set to all-zero or all-one (i.e. -1u) */ 51 typedef uint32_t c448_bool_t; 52 /* Double-word size for internal computations */ 53 typedef uint64_t c448_dword_t; 54 /* Signed double-word size for internal computations */ 55 typedef int64_t c448_dsword_t; 56 # else 57 # error "Only supporting C448_WORD_BITS = 32 or 64 for now" 58 # endif 59 60 /* C448_TRUE = -1 so that C448_TRUE & x = x */ 61 # define C448_TRUE (0 - (c448_bool_t)1) 62 63 /* C448_FALSE = 0 so that C448_FALSE & x = 0 */ 64 # define C448_FALSE 0 65 66 /* Another boolean type used to indicate success or failure. */ 67 typedef enum { 68 C448_SUCCESS = -1, /**< The operation succeeded. */ 69 C448_FAILURE = 0 /**< The operation failed. */ 70 } c448_error_t; 71 72 /* Return success if x is true */ 73 static ossl_inline c448_error_t c448_succeed_if(c448_bool_t x) 74 { 75 return (c448_error_t) x; 76 } 77 78 #endif /* __C448_COMMON_H__ */ 79