/*
***********************************************************************
*
* Implementation of the Skein hash function.
*
* Source code author: Doug Whiting, 2008.
*
* This algorithm and source code is released to the public domain.
*
***********************************************************************
*/
#ifndef _SKEIN_BLOCK_H_
#define _SKEIN_BLOCK_H_
#include "skein_base.h" /* get the Skein API definitions */
#ifndef SKEIN_USE_ASM
#define SKEIN_USE_ASM (0) /* default is all C code (no ASM) */
#endif
#ifndef SKEIN_LOOP
#define SKEIN_LOOP 001 /* default: unroll 256 and 512, but not 1024 */
#endif
#define BLK_BITS (WCNT * 64) /* some useful definitions for code here */
#define KW_TWK_BASE (0)
#define KW_KEY_BASE (3)
#define ks (kw + KW_KEY_BASE)
#define ts (kw + KW_TWK_BASE)
#ifdef SKEIN_DEBUG
#define debug_save_tweak(ctx) \
{ \
ctx->h.tweak[0] = ts[0]; \
ctx->h.tweak[1] = ts[1]; \
}
#else
#define debug_save_tweak(ctx)
#endif
#if !(SKEIN_USE_ASM & 256)
#undef RCNT
#define RCNT (SKEIN_256_ROUNDS_TOTAL / 8)
#ifdef SKEIN_LOOP /* configure how much to unroll the loop */
#define SKEIN_UNROLL_256 (((SKEIN_LOOP) / 100) % 10)
#else
#define SKEIN_UNROLL_256 (0)
#endif
#if SKEIN_UNROLL_256
#if (RCNT % SKEIN_UNROLL_256)
#error "Invalid SKEIN_UNROLL_256" /* sanity check on unroll count */
#endif
#endif
#define ROUND256(p0, p1, p2, p3, ROT, r_num) \
do { \
X##p0 += X##p1; \
X##p1 = rol64(X##p1, ROT##_0); \
X##p1 ^= X##p0; \
X##p2 += X##p3; \
X##p3 = rol64(X##p3, ROT##_1); \
X##p3 ^= X##p2; \
} while (0)
#if SKEIN_UNROLL_256 == 0
#define R256(p0, p1, p2, p3, ROT, r_num) /* fully unrolled */ \
ROUND256(p0, p1, p2, p3, ROT, r_num)
#define I256(R) \
do { \
/* inject the key schedule value */ \
X0 += ks[((R) + 1) % 5]; \
X1 += ks[((R) + 2) % 5] + ts[((R) + 1) % 3]; \
X2 += ks[((R) + 3) % 5] + ts[((R) + 2) % 3]; \
X3 += ks[((R) + 4) % 5] + (R) + 1; \
} while (0)
#else
/* looping version */
#define R256(p0, p1, p2, p3, ROT, r_num) ROUND256(p0, p1, p2, p3, ROT, r_num)
#define I256(R) \
do { \
/* inject the key schedule value */ \
X0 += ks[r + (R) + 0]; \
X1 += ks[r + (R) + 1] + ts[r + (R) + 0];\
X2 += ks[r + (R) + 2] + ts[r + (R) + 1];\
X3 += ks[r + (R) + 3] + r + (R); \
/* rotate key schedule */ \
ks[r + (R) + 4] = ks[r + (R) - 1]; \
ts[r + (R) + 2] = ts[r + (R) - 1]; \
} while (0)
#endif
#define R256_8_ROUNDS(R) \
do { \
R256(0, 1, 2, 3, R_256_0, 8 * (R) + 1); \
R256(0, 3, 2, 1, R_256_1, 8 * (R) + 2); \
R256(0, 1, 2, 3, R_256_2, 8 * (R) + 3); \
R256(0, 3, 2, 1, R_256_3, 8 * (R) + 4); \
I256(2 * (R)); \
R256(0, 1, 2, 3, R_256_4, 8 * (R) + 5); \
R256(0, 3, 2, 1, R_256_5, 8 * (R) + 6); \
R256(0, 1, 2, 3, R_256_6, 8 * (R) + 7); \
R256(0, 3, 2, 1, R_256_7, 8 * (R) + 8); \
I256(2 * (R) + 1); \
} while (0)
#define R256_UNROLL_R(NN) \
((SKEIN_UNROLL_256 == 0 && \
SKEIN_256_ROUNDS_TOTAL / 8 > (NN)) || \
(SKEIN_UNROLL_256 > (NN)))
#if (SKEIN_UNROLL_256 > 14)
#error "need more unrolling in skein_256_process_block"
#endif
#endif
#if !(SKEIN_USE_ASM & 512)
#undef RCNT
#define RCNT (SKEIN_512_ROUNDS_TOTAL / 8)
#ifdef SKEIN_LOOP /* configure how much to unroll the loop */
#define SKEIN_UNROLL_512 (((SKEIN_LOOP) / 10) % 10)
#else
#define SKEIN_UNROLL_512 (0)
#endif
#if SKEIN_UNROLL_512
#if (RCNT % SKEIN_UNROLL_512)
#error "Invalid SKEIN_UNROLL_512" /* sanity check on unroll count */
#endif
#endif
#define ROUND512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num) \
do { \
X##p0 += X##p1; \
X##p1 = rol64(X##p1, ROT##_0); \
X##p1 ^= X##p0; \
X##p2 += X##p3; \
X##p3 = rol64(X##p3, ROT##_1); \
X##p3 ^= X##p2; \
X##p4 += X##p5; \
X##p5 = rol64(X##p5, ROT##_2); \
X##p5 ^= X##p4; \
X##p6 += X##p7; \
X##p7 = rol64(X##p7, ROT##_3); \
X##p7 ^= X##p6; \
} while (0)
#if SKEIN_UNROLL_512 == 0
#define R512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num) /* unrolled */ \
ROUND512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num)
#define I512(R) \
do { \
/* inject the key schedule value */ \
X0 += ks[((R) + 1) % 9]; \
X1 += ks[((R) + 2) % 9]; \
X2 += ks[((R) + 3) % 9]; \
X3 += ks[((R) + 4) % 9]; \
X4 += ks[((R) + 5) % 9]; \
X5 += ks[((R) + 6) % 9] + ts[((R) + 1) % 3]; \
X6 += ks[((R) + 7) % 9] + ts[((R) + 2) % 3]; \
X7 += ks[((R) + 8) % 9] + (R) + 1; \
} while (0)
#else /* looping version */
#define R512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num) \
ROUND512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num) \
#define I512(R) \
do { \
/* inject the key schedule value */ \
X0 += ks[r + (R) + 0]; \
X1 += ks[r + (R) + 1]; \
X2 += ks[r + (R) + 2]; \
X3 += ks[r + (R) + 3]; \
X4 += ks[r + (R) + 4]; \
X5 += ks[r + (R) + 5] + ts[r + (R) + 0]; \
X6 += ks[r + (R) + 6] + ts[r + (R) + 1]; \
X7 += ks[r + (R) + 7] + r + (R); \
/* rotate key schedule */ \
ks[r + (R) + 8] = ks[r + (R) - 1]; \
ts[r + (R) + 2] = ts[r + (R) - 1]; \
} while (0)
#endif /* end of looped code definitions */
#define R512_8_ROUNDS(R) /* do 8 full rounds */ \
do { \
R512(0, 1, 2, 3, 4, 5, 6, 7, R_512_0, 8 * (R) + 1); \
R512(2, 1, 4, 7, 6, 5, 0, 3, R_512_1, 8 * (R) + 2); \
R512(4, 1, 6, 3, 0, 5, 2, 7, R_512_2, 8 * (R) + 3); \
R512(6, 1, 0, 7, 2, 5, 4, 3, R_512_3, 8 * (R) + 4); \
I512(2 * (R)); \
R512(0, 1, 2, 3, 4, 5, 6, 7, R_512_4, 8 * (R) + 5); \
R512(2, 1, 4, 7, 6, 5, 0, 3, R_512_5, 8 * (R) + 6); \
R512(4, 1, 6, 3, 0, 5, 2, 7, R_512_6, 8 * (R) + 7); \
R512(6, 1, 0, 7, 2, 5, 4, 3, R_512_7, 8 * (R) + 8); \
I512(2 * (R) + 1); /* and key injection */ \
} while (0)
#define R512_UNROLL_R(NN) \
((SKEIN_UNROLL_512 == 0 && \
SKEIN_512_ROUNDS_TOTAL / 8 > (NN)) || \
(SKEIN_UNROLL_512 > (NN)))
#if (SKEIN_UNROLL_512 > 14)
#error "need more unrolling in skein_512_process_block"
#endif
#endif
#if !(SKEIN_USE_ASM & 1024)
#undef RCNT
#define RCNT (SKEIN_1024_ROUNDS_TOTAL / 8)
#ifdef SKEIN_LOOP /* configure how much to unroll the loop */
#define SKEIN_UNROLL_1024 ((SKEIN_LOOP) % 10)
#else
#define SKEIN_UNROLL_1024 (0)
#endif
#if (SKEIN_UNROLL_1024 != 0)
#if (RCNT % SKEIN_UNROLL_1024)
#error "Invalid SKEIN_UNROLL_1024" /* sanity check on unroll count */
#endif
#endif
#define ROUND1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, \
pF, ROT, r_num) \
do { \
X##p0 += X##p1; \
X##p1 = rol64(X##p1, ROT##_0); \
X##p1 ^= X##p0; \
X##p2 += X##p3; \
X##p3 = rol64(X##p3, ROT##_1); \
X##p3 ^= X##p2; \
X##p4 += X##p5; \
X##p5 = rol64(X##p5, ROT##_2); \
X##p5 ^= X##p4; \
X##p6 += X##p7; \
X##p7 = rol64(X##p7, ROT##_3); \
X##p7 ^= X##p6; \
X##p8 += X##p9; \
X##p9 = rol64(X##p9, ROT##_4); \
X##p9 ^= X##p8; \
X##pA += X##pB; \
X##pB = rol64(X##pB, ROT##_5); \
X##pB ^= X##pA; \
X##pC += X##pD; \
X##pD = rol64(X##pD, ROT##_6); \
X##pD ^= X##pC; \
X##pE += X##pF; \
X##pF = rol64(X##pF, ROT##_7); \
X##pF ^= X##pE; \
} while (0)
#if SKEIN_UNROLL_1024 == 0
#define R1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, pF, \
ROT, rn) \
ROUND1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, \
pF, ROT, rn) \
#define I1024(R) \
do { \
/* inject the key schedule value */ \
X00 += ks[((R) + 1) % 17]; \
X01 += ks[((R) + 2) % 17]; \
X02 += ks[((R) + 3) % 17]; \
X03 += ks[((R) + 4) % 17]; \
X04 += ks[((R) + 5) % 17]; \
X05 += ks[((R) + 6) % 17]; \
X06 += ks[((R) + 7) % 17]; \
X07 += ks[((R) + 8) % 17]; \
X08 += ks[((R) + 9) % 17]; \
X09 += ks[((R) + 10) % 17]; \
X10 += ks[((R) + 11) % 17]; \
X11 += ks[((R) + 12) % 17]; \
X12 += ks[((R) + 13) % 17]; \
X13 += ks[((R) + 14) % 17] + ts[((R) + 1) % 3]; \
X14 += ks[((R) + 15) % 17] + ts[((R) + 2) % 3]; \
X15 += ks[((R) + 16) % 17] + (R) + 1; \
} while (0)
#else /* looping version */
#define R1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, pF, \
ROT, rn) \
ROUND1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, \
pF, ROT, rn) \
#define I1024(R) \
do { \
/* inject the key schedule value */ \
X00 += ks[r + (R) + 0]; \
X01 += ks[r + (R) + 1]; \
X02 += ks[r + (R) + 2]; \
X03 += ks[r + (R) + 3]; \
X04 += ks[r + (R) + 4]; \
X05 += ks[r + (R) + 5]; \
X06 += ks[r + (R) + 6]; \
X07 += ks[r + (R) + 7]; \
X08 += ks[r + (R) + 8]; \
X09 += ks[r + (R) + 9]; \
X10 += ks[r + (R) + 10]; \
X11 += ks[r + (R) + 11]; \
X12 += ks[r + (R) + 12]; \
X13 += ks[r + (R) + 13] + ts[r + (R) + 0]; \
X14 += ks[r + (R) + 14] + ts[r + (R) + 1]; \
X15 += ks[r + (R) + 15] + r + (R); \
/* rotate key schedule */ \
ks[r + (R) + 16] = ks[r + (R) - 1]; \
ts[r + (R) + 2] = ts[r + (R) - 1]; \
} while (0)
#endif
#define R1024_8_ROUNDS(R) \
do { \
R1024(00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, \
13, 14, 15, R1024_0, 8 * (R) + 1); \
R1024(00, 09, 02, 13, 06, 11, 04, 15, 10, 07, 12, 03, 14, \
05, 08, 01, R1024_1, 8 * (R) + 2); \
R1024(00, 07, 02, 05, 04, 03, 06, 01, 12, 15, 14, 13, 08, \
11, 10, 09, R1024_2, 8 * (R) + 3); \
R1024(00, 15, 02, 11, 06, 13, 04, 09, 14, 01, 08, 05, 10, \
03, 12, 07, R1024_3, 8 * (R) + 4); \
I1024(2 * (R)); \
R1024(00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, \
13, 14, 15, R1024_4, 8 * (R) + 5); \
R1024(00, 09, 02, 13, 06, 11, 04, 15, 10, 07, 12, 03, 14, \
05, 08, 01, R1024_5, 8 * (R) + 6); \
R1024(00, 07, 02, 05, 04, 03, 06, 01, 12, 15, 14, 13, 08, \
11, 10, 09, R1024_6, 8 * (R) + 7); \
R1024(00, 15, 02, 11, 06, 13, 04, 09, 14, 01, 08, 05, 10, \
03, 12, 07, R1024_7, 8 * (R) + 8); \
I1024(2 * (R) + 1); \
} while (0)
#define R1024_UNROLL_R(NN) \
((SKEIN_UNROLL_1024 == 0 && \
SKEIN_1024_ROUNDS_TOTAL / 8 > (NN)) || \
(SKEIN_UNROLL_1024 > (NN)))
#if (SKEIN_UNROLL_1024 > 14)
#error "need more unrolling in Skein_1024_Process_Block"
#endif
#endif
void skein_256_process_block(struct skein_256_ctx *ctx, const u8 *blk_ptr,
size_t blk_cnt, size_t byte_cnt_add);
void skein_512_process_block(struct skein_512_ctx *ctx, const u8 *blk_ptr,
size_t blk_cnt, size_t byte_cnt_add);
void skein_1024_process_block(struct skein_1024_ctx *ctx, const u8 *blk_ptr,
size_t blk_cnt, size_t byte_cnt_add);
#endif
