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 *
 * ===========================(LICENSE END)=============================
 *
 * @author   Thomas Pornin <thomas.pornin@cryptolog.com>
 */

#include <stddef.h>
#include <string.h>
#include <limits.h>

#include "sph_bmw.h"

#if SPH_SMALL_FOOTPRINT && !defined SPH_SMALL_FOOTPRINT_BMW
#define SPH_SMALL_FOOTPRINT_BMW   1
#endif

#ifdef _MSC_VER
#pragma warning (disable: 4146)
#endif

static const sph_u32 IV224[] = {
	SPH_C32(0x00010203), SPH_C32(0x04050607),
	SPH_C32(0x08090A0B), SPH_C32(0x0C0D0E0F),
	SPH_C32(0x10111213), SPH_C32(0x14151617),
	SPH_C32(0x18191A1B), SPH_C32(0x1C1D1E1F),
	SPH_C32(0x20212223), SPH_C32(0x24252627),
	SPH_C32(0x28292A2B), SPH_C32(0x2C2D2E2F),
	SPH_C32(0x30313233), SPH_C32(0x34353637),
	SPH_C32(0x38393A3B), SPH_C32(0x3C3D3E3F)
};

static const sph_u32 IV256[] = {
	SPH_C32(0x40414243), SPH_C32(0x44454647),
	SPH_C32(0x48494A4B), SPH_C32(0x4C4D4E4F),
	SPH_C32(0x50515253), SPH_C32(0x54555657),
	SPH_C32(0x58595A5B), SPH_C32(0x5C5D5E5F),
	SPH_C32(0x60616263), SPH_C32(0x64656667),
	SPH_C32(0x68696A6B), SPH_C32(0x6C6D6E6F),
	SPH_C32(0x70717273), SPH_C32(0x74757677),
	SPH_C32(0x78797A7B), SPH_C32(0x7C7D7E7F)
};

#if SPH_64

static const sph_u64 IV384[] = {
	SPH_C64(0x0001020304050607), SPH_C64(0x08090A0B0C0D0E0F),
	SPH_C64(0x1011121314151617), SPH_C64(0x18191A1B1C1D1E1F),
	SPH_C64(0x2021222324252627), SPH_C64(0x28292A2B2C2D2E2F),
	SPH_C64(0x3031323334353637), SPH_C64(0x38393A3B3C3D3E3F),
	SPH_C64(0x4041424344454647), SPH_C64(0x48494A4B4C4D4E4F),
	SPH_C64(0x5051525354555657), SPH_C64(0x58595A5B5C5D5E5F),
	SPH_C64(0x6061626364656667), SPH_C64(0x68696A6B6C6D6E6F),
	SPH_C64(0x7071727374757677), SPH_C64(0x78797A7B7C7D7E7F)
};

static const sph_u64 IV512[] = {
	SPH_C64(0x8081828384858687), SPH_C64(0x88898A8B8C8D8E8F),
	SPH_C64(0x9091929394959697), SPH_C64(0x98999A9B9C9D9E9F),
	SPH_C64(0xA0A1A2A3A4A5A6A7), SPH_C64(0xA8A9AAABACADAEAF),
	SPH_C64(0xB0B1B2B3B4B5B6B7), SPH_C64(0xB8B9BABBBCBDBEBF),
	SPH_C64(0xC0C1C2C3C4C5C6C7), SPH_C64(0xC8C9CACBCCCDCECF),
	SPH_C64(0xD0D1D2D3D4D5D6D7), SPH_C64(0xD8D9DADBDCDDDEDF),
	SPH_C64(0xE0E1E2E3E4E5E6E7), SPH_C64(0xE8E9EAEBECEDEEEF),
	SPH_C64(0xF0F1F2F3F4F5F6F7), SPH_C64(0xF8F9FAFBFCFDFEFF)
};

#endif

#define XCAT(x, y)    XCAT_(x, y)
#define XCAT_(x, y)   x ## y

#define LPAR   (

#define I16_16    0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15
#define I16_17    1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16
#define I16_18    2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16, 17
#define I16_19    3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16, 17, 18
#define I16_20    4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19
#define I16_21    5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20
#define I16_22    6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21
#define I16_23    7,  8,  9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22
#define I16_24    8,  9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23
#define I16_25    9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
#define I16_26   10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25
#define I16_27   11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26
#define I16_28   12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27
#define I16_29   13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28
#define I16_30   14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29
#define I16_31   15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30

#define M16_16    0,  1,  3,  4,  7, 10, 11
#define M16_17    1,  2,  4,  5,  8, 11, 12
#define M16_18    2,  3,  5,  6,  9, 12, 13
#define M16_19    3,  4,  6,  7, 10, 13, 14
#define M16_20    4,  5,  7,  8, 11, 14, 15
#define M16_21    5,  6,  8,  9, 12, 15, 16
#define M16_22    6,  7,  9, 10, 13,  0,  1
#define M16_23    7,  8, 10, 11, 14,  1,  2
#define M16_24    8,  9, 11, 12, 15,  2,  3
#define M16_25    9, 10, 12, 13,  0,  3,  4
#define M16_26   10, 11, 13, 14,  1,  4,  5
#define M16_27   11, 12, 14, 15,  2,  5,  6
#define M16_28   12, 13, 15, 16,  3,  6,  7
#define M16_29   13, 14,  0,  1,  4,  7,  8
#define M16_30   14, 15,  1,  2,  5,  8,  9
#define M16_31   15, 16,  2,  3,  6,  9, 10

#define ss0(x)    (((x) >> 1) ^ SPH_T32((x) << 3) \
                  ^ SPH_ROTL32(x,  4) ^ SPH_ROTL32(x, 19))
#define ss1(x)    (((x) >> 1) ^ SPH_T32((x) << 2) \
                  ^ SPH_ROTL32(x,  8) ^ SPH_ROTL32(x, 23))
#define ss2(x)    (((x) >> 2) ^ SPH_T32((x) << 1) \
                  ^ SPH_ROTL32(x, 12) ^ SPH_ROTL32(x, 25))
#define ss3(x)    (((x) >> 2) ^ SPH_T32((x) << 2) \
                  ^ SPH_ROTL32(x, 15) ^ SPH_ROTL32(x, 29))
#define ss4(x)    (((x) >> 1) ^ (x))
#define ss5(x)    (((x) >> 2) ^ (x))
#define rs1(x)    SPH_ROTL32(x,  3)
#define rs2(x)    SPH_ROTL32(x,  7)
#define rs3(x)    SPH_ROTL32(x, 13)
#define rs4(x)    SPH_ROTL32(x, 16)