word.h

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word.h

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/home/opencoverage/opencoverage/guest-scripts/openssl/src/crypto/ec/curve448/word.h

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* Licensed under the OpenSSL license (the "License"). You may not use

* this file except in compliance with the License. You can obtain a copy

* in the file LICENSE in the source distribution or at

* https://www.openssl.org/source/license.html

* Originally written by Mike Hamburg

#ifndef HEADER_WORD_H

# define HEADER_WORD_H

# include <string.h>

# include <assert.h>

# include <stdlib.h>

# include <openssl/e_os2.h>

# include "arch_intrinsics.h"

# include "curve448utils.h"

# if (ARCH_WORD_BITS == 64)

typedef uint64_t word_t, mask_t;

typedef __uint128_t dword_t;

typedef int32_t hsword_t;

typedef int64_t sword_t;

typedef __int128_t dsword_t;

# elif (ARCH_WORD_BITS == 32)

typedef uint32_t word_t, mask_t;

typedef uint64_t dword_t;

typedef int16_t hsword_t;

typedef int32_t sword_t;

typedef int64_t dsword_t;

# else

# error "For now, we only support 32- and 64-bit architectures."

# endif

* Scalar limbs are keyed off of the API word size instead of the arch word

* size.

# if C448_WORD_BITS == 64

# define SC_LIMB(x) (x)

# elif C448_WORD_BITS == 32

# define SC_LIMB(x) ((uint32_t)(x)),((x) >> 32)

# else

# error "For now we only support 32- and 64-bit architectures."

# endif

* The plan on booleans: The external interface uses c448_bool_t, but this

* might be a different size than our particular arch's word_t (and thus

* mask_t). Also, the caller isn't guaranteed to pass it as nonzero. So

* bool_to_mask converts word sizes and checks nonzero. On the flip side,

* mask_t is always -1 or 0, but it might be a different size than

* c448_bool_t. On the third hand, we have success vs boolean types, but

* that's handled in common.h: it converts between c448_bool_t and

* c448_error_t.

static ossl_inline c448_bool_t mask_to_bool(mask_t m)

{

return (c448_sword_t)(sword_t)m;

executed 1041 times by 2 tests: return (c448_sword_t)(sword_t)m;

Executed by:

curve448_internal_test
libcrypto.so.1.1

1041

}

static ossl_inline mask_t bool_to_mask(c448_bool_t m)

{

/* On most arches this will be optimized to a simple cast. */

mask_t ret = 0;

unsigned int i;

unsigned int limit = sizeof(c448_bool_t) / sizeof(mask_t);

if (limit < 1)

limit < 1	Description
TRUE	never evaluated
FALSE	never evaluated

limit = 1;

never executed: limit = 1;

for (i = 0; i < limit; i++)

i < limit	Description
TRUE	never evaluated
FALSE	never evaluated

ret |= ~word_is_zero(m >> (i * 8 * sizeof(word_t)));

never executed: ret |= ~constant_time_is_zero_32(m >> (i * 8 * sizeof(word_t)));

return ret;

never executed: return ret;

}

#endif /* HEADER_WORD_H */

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