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trezor-firmware/crypto/chacha20poly1305/ecrypt-portable.h

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2017-05-11 11:27:34 +00:00
/* ecrypt-portable.h */
/*
* WARNING: the conversions defined below are implemented as macros,
* and should be used carefully. They should NOT be used with
* parameters which perform some action. E.g., the following two lines
* are not equivalent:
*
* 1) ++x; y = ROTL32(x, n);
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* 2) y = ROTL32(++x, n);
*/
/*
* *** Please do not edit this file. ***
*
* The default macros can be overridden for specific architectures by
* editing 'ecrypt-machine.h'.
*/
#ifndef ECRYPT_PORTABLE
#define ECRYPT_PORTABLE
#include "ecrypt-config.h"
#include "ecrypt-types.h"
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/* ------------------------------------------------------------------------- */
/*
* The following macros are used to obtain exact-width results.
*/
#define U8V(v) ((u8)(v) & U8C(0xFF))
#define U16V(v) ((u16)(v) & U16C(0xFFFF))
#define U32V(v) ((u32)(v) & U32C(0xFFFFFFFF))
#define U64V(v) ((u64)(v) & U64C(0xFFFFFFFFFFFFFFFF))
/* ------------------------------------------------------------------------- */
/*
* The following macros return words with their bits rotated over n
* positions to the left/right.
*/
#define ECRYPT_DEFAULT_ROT
#define ROTL8(v, n) \
(U8V((v) << (n)) | ((v) >> (8 - (n))))
#define ROTL16(v, n) \
(U16V((v) << (n)) | ((v) >> (16 - (n))))
#define ROTL32(v, n) \
(U32V((v) << (n)) | ((v) >> (32 - (n))))
#define ROTL64(v, n) \
(U64V((v) << (n)) | ((v) >> (64 - (n))))
#define ROTR8(v, n) ROTL8(v, 8 - (n))
#define ROTR16(v, n) ROTL16(v, 16 - (n))
#define ROTR32(v, n) ROTL32(v, 32 - (n))
#define ROTR64(v, n) ROTL64(v, 64 - (n))
#include "ecrypt-machine.h"
/* ------------------------------------------------------------------------- */
/*
* The following macros return a word with bytes in reverse order.
*/
#define ECRYPT_DEFAULT_SWAP
#define SWAP16(v) \
ROTL16(v, 8)
#define SWAP32(v) \
((ROTL32(v, 8) & U32C(0x00FF00FF)) | \
(ROTL32(v, 24) & U32C(0xFF00FF00)))
#ifdef ECRYPT_NATIVE64
#define SWAP64(v) \
((ROTL64(v, 8) & U64C(0x000000FF000000FF)) | \
(ROTL64(v, 24) & U64C(0x0000FF000000FF00)) | \
(ROTL64(v, 40) & U64C(0x00FF000000FF0000)) | \
(ROTL64(v, 56) & U64C(0xFF000000FF000000)))
#else
#define SWAP64(v) \
(((u64)SWAP32(U32V(v)) << 32) | (u64)SWAP32(U32V(v >> 32)))
#endif
#include "ecrypt-machine.h"
#define ECRYPT_DEFAULT_WTOW
#ifdef ECRYPT_LITTLE_ENDIAN
#define U16TO16_LITTLE(v) (v)
#define U32TO32_LITTLE(v) (v)
#define U64TO64_LITTLE(v) (v)
#define U16TO16_BIG(v) SWAP16(v)
#define U32TO32_BIG(v) SWAP32(v)
#define U64TO64_BIG(v) SWAP64(v)
#endif
#ifdef ECRYPT_BIG_ENDIAN
#define U16TO16_LITTLE(v) SWAP16(v)
#define U32TO32_LITTLE(v) SWAP32(v)
#define U64TO64_LITTLE(v) SWAP64(v)
#define U16TO16_BIG(v) (v)
#define U32TO32_BIG(v) (v)
#define U64TO64_BIG(v) (v)
#endif
#include "ecrypt-machine.h"
/*
* The following macros load words from an array of bytes with
* different types of endianness, and vice versa.
*/
#define ECRYPT_DEFAULT_BTOW
#if (!defined(ECRYPT_UNKNOWN) && defined(ECRYPT_I8T_IS_BYTE))
#define U8TO16_LITTLE(p) U16TO16_LITTLE(((u16*)(p))[0])
#define U8TO32_LITTLE(p) U32TO32_LITTLE(((u32*)(p))[0])
#define U8TO64_LITTLE(p) U64TO64_LITTLE(((u64*)(p))[0])
#define U8TO16_BIG(p) U16TO16_BIG(((u16*)(p))[0])
#define U8TO32_BIG(p) U32TO32_BIG(((u32*)(p))[0])
#define U8TO64_BIG(p) U64TO64_BIG(((u64*)(p))[0])
#define U16TO8_LITTLE(p, v) (((u16*)(p))[0] = U16TO16_LITTLE(v))
#define U32TO8_LITTLE(p, v) (((u32*)(p))[0] = U32TO32_LITTLE(v))
#define U64TO8_LITTLE(p, v) (((u64*)(p))[0] = U64TO64_LITTLE(v))
#define U16TO8_BIG(p, v) (((u16*)(p))[0] = U16TO16_BIG(v))
#define U32TO8_BIG(p, v) (((u32*)(p))[0] = U32TO32_BIG(v))
#define U64TO8_BIG(p, v) (((u64*)(p))[0] = U64TO64_BIG(v))
#else
#define U8TO16_LITTLE(p) \
(((u16)((p)[0]) ) | \
((u16)((p)[1]) << 8))
#define U8TO32_LITTLE(p) \
(((u32)((p)[0]) ) | \
((u32)((p)[1]) << 8) | \
((u32)((p)[2]) << 16) | \
((u32)((p)[3]) << 24))
#ifdef ECRYPT_NATIVE64
#define U8TO64_LITTLE(p) \
(((u64)((p)[0]) ) | \
((u64)((p)[1]) << 8) | \
((u64)((p)[2]) << 16) | \
((u64)((p)[3]) << 24) | \
((u64)((p)[4]) << 32) | \
((u64)((p)[5]) << 40) | \
((u64)((p)[6]) << 48) | \
((u64)((p)[7]) << 56))
#else
#define U8TO64_LITTLE(p) \
((u64)U8TO32_LITTLE(p) | ((u64)U8TO32_LITTLE((p) + 4) << 32))
#endif
#define U8TO16_BIG(p) \
(((u16)((p)[0]) << 8) | \
((u16)((p)[1]) ))
#define U8TO32_BIG(p) \
(((u32)((p)[0]) << 24) | \
((u32)((p)[1]) << 16) | \
((u32)((p)[2]) << 8) | \
((u32)((p)[3]) ))
#ifdef ECRYPT_NATIVE64
#define U8TO64_BIG(p) \
(((u64)((p)[0]) << 56) | \
((u64)((p)[1]) << 48) | \
((u64)((p)[2]) << 40) | \
((u64)((p)[3]) << 32) | \
((u64)((p)[4]) << 24) | \
((u64)((p)[5]) << 16) | \
((u64)((p)[6]) << 8) | \
((u64)((p)[7]) ))
#else
#define U8TO64_BIG(p) \
(((u64)U8TO32_BIG(p) << 32) | (u64)U8TO32_BIG((p) + 4))
#endif
#define U16TO8_LITTLE(p, v) \
do { \
(p)[0] = U8V((v) ); \
(p)[1] = U8V((v) >> 8); \
} while (0)
#define U32TO8_LITTLE(p, v) \
do { \
(p)[0] = U8V((v) ); \
(p)[1] = U8V((v) >> 8); \
(p)[2] = U8V((v) >> 16); \
(p)[3] = U8V((v) >> 24); \
} while (0)
#ifdef ECRYPT_NATIVE64
#define U64TO8_LITTLE(p, v) \
do { \
(p)[0] = U8V((v) ); \
(p)[1] = U8V((v) >> 8); \
(p)[2] = U8V((v) >> 16); \
(p)[3] = U8V((v) >> 24); \
(p)[4] = U8V((v) >> 32); \
(p)[5] = U8V((v) >> 40); \
(p)[6] = U8V((v) >> 48); \
(p)[7] = U8V((v) >> 56); \
} while (0)
#else
#define U64TO8_LITTLE(p, v) \
do { \
U32TO8_LITTLE((p), U32V((v) )); \
U32TO8_LITTLE((p) + 4, U32V((v) >> 32)); \
} while (0)
#endif
#define U16TO8_BIG(p, v) \
do { \
(p)[0] = U8V((v) ); \
(p)[1] = U8V((v) >> 8); \
} while (0)
#define U32TO8_BIG(p, v) \
do { \
(p)[0] = U8V((v) >> 24); \
(p)[1] = U8V((v) >> 16); \
(p)[2] = U8V((v) >> 8); \
(p)[3] = U8V((v) ); \
} while (0)
#ifdef ECRYPT_NATIVE64
#define U64TO8_BIG(p, v) \
do { \
(p)[0] = U8V((v) >> 56); \
(p)[1] = U8V((v) >> 48); \
(p)[2] = U8V((v) >> 40); \
(p)[3] = U8V((v) >> 32); \
(p)[4] = U8V((v) >> 24); \
(p)[5] = U8V((v) >> 16); \
(p)[6] = U8V((v) >> 8); \
(p)[7] = U8V((v) ); \
} while (0)
#else
#define U64TO8_BIG(p, v) \
do { \
U32TO8_BIG((p), U32V((v) >> 32)); \
U32TO8_BIG((p) + 4, U32V((v) )); \
} while (0)
#endif
#endif
#include "ecrypt-machine.h"
/* ------------------------------------------------------------------------- */
#define AT_LEAST_ONE(n) (((n) < 1) ? 1 : (n))
#define ALIGN(t, v, n) \
union { t b[n]; MAXT l[AT_LEAST_ONE(n * sizeof(t) / sizeof(MAXT))]; } v
/* ------------------------------------------------------------------------- */
#endif