2 * Copyright 2017-2019 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 && !defined(__sparc__) \
28 && (!defined(__SIZEOF_LONG__) || (__SIZEOF_LONG__ == 8))
30 # define C448_WORD_BITS 64 /* The number of bits in a word */
32 # define C448_WORD_BITS 32 /* The number of bits in a word */
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;
59 # error "Only supporting C448_WORD_BITS = 32 or 64 for now"
62 /* C448_TRUE = -1 so that C448_TRUE & x = x */
63 # define C448_TRUE (0 - (c448_bool_t)1)
65 /* C448_FALSE = 0 so that C448_FALSE & x = 0 */
68 /* Another boolean type used to indicate success or failure. */
70 C448_SUCCESS = -1, /**< The operation succeeded. */
71 C448_FAILURE = 0 /**< The operation failed. */
74 /* Return success if x is true */
75 static ossl_inline c448_error_t c448_succeed_if(c448_bool_t x)
77 return (c448_error_t) x;
80 #endif /* __C448_COMMON_H__ */