2 * Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright 2015 Cryptography Research, Inc.
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
10 * Originally written by Mike Hamburg
13 #ifndef HEADER_CURVE448UTILS_H
14 # define HEADER_CURVE448UTILS_H
16 # include <openssl/e_os2.h>
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
25 # ifndef C448_WORD_BITS
26 # if defined(__SIZEOF_INT128__) && (__SIZEOF_INT128__ == 16)
27 # define C448_WORD_BITS 64 /* The number of bits in a word */
29 # define C448_WORD_BITS 32 /* The number of bits in a word */
33 # if C448_WORD_BITS == 64
34 /* Word size for internal computations */
35 typedef uint64_t c448_word_t;
36 /* Signed word size for internal computations */
37 typedef int64_t c448_sword_t;
38 /* "Boolean" type, will be set to all-zero or all-one (i.e. -1u) */
39 typedef uint64_t c448_bool_t;
40 /* Double-word size for internal computations */
41 typedef __uint128_t c448_dword_t;
42 /* Signed double-word size for internal computations */
43 typedef __int128_t c448_dsword_t;
44 # elif C448_WORD_BITS == 32
45 /* Word size for internal computations */
46 typedef uint32_t c448_word_t;
47 /* Signed word size for internal computations */
48 typedef int32_t c448_sword_t;
49 /* "Boolean" type, will be set to all-zero or all-one (i.e. -1u) */
50 typedef uint32_t c448_bool_t;
51 /* Double-word size for internal computations */
52 typedef uint64_t c448_dword_t;
53 /* Signed double-word size for internal computations */
54 typedef int64_t c448_dsword_t;
56 # error "Only supporting C448_WORD_BITS = 32 or 64 for now"
59 /* C448_TRUE = -1 so that C448_TRUE & x = x */
60 # define C448_TRUE (0 - (c448_bool_t)1)
62 /* C448_FALSE = 0 so that C448_FALSE & x = 0 */
65 /* Another boolean type used to indicate success or failure. */
67 C448_SUCCESS = -1, /**< The operation succeeded. */
68 C448_FAILURE = 0 /**< The operation failed. */
71 /* Return success if x is true */
72 static ossl_inline c448_error_t c448_succeed_if(c448_bool_t x)
74 return (c448_error_t) x;
77 #endif /* __C448_COMMON_H__ */