[PATCH] Staging: Skein: Moved macros from skein_block.c to header
From: Sanidhya Solanki
Date: Sat Dec 05 2015 - 10:37:16 EST
Staging: Skein: Moved macros from skein_block.c to header
file.
The original code defined macros in the source code, making it
harder to read. Moved them to the header file, as per the TODO file.
Signed-off-by: Sanidhya Solanki <jpage.lkml@xxxxxxxxx>
---
drivers/staging/skein/skein_block.c | 473 +-----------------------------------
drivers/staging/skein/skein_block.h | 454 ++++++++++++++++++++++++++++++++++
2 files changed, 466 insertions(+), 461 deletions(-)
diff --git a/drivers/staging/skein/skein_block.c b/drivers/staging/skein/skein_block.c
index 45b4732..ec8292d 100644
--- a/drivers/staging/skein/skein_block.c
+++ b/drivers/staging/skein/skein_block.c
@@ -18,458 +18,6 @@
#include "skein_base.h"
#include "skein_block.h"
-#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 = rotl_64(X##p1, ROT##_0); \
- X##p1 ^= X##p0; \
- X##p2 += X##p3; \
- X##p3 = rotl_64(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 = rotl_64(X##p1, ROT##_0); \
- X##p1 ^= X##p0; \
- X##p2 += X##p3; \
- X##p3 = rotl_64(X##p3, ROT##_1); \
- X##p3 ^= X##p2; \
- X##p4 += X##p5; \
- X##p5 = rotl_64(X##p5, ROT##_2); \
- X##p5 ^= X##p4; \
- X##p6 += X##p7; X##p7 = rotl_64(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 = rotl_64(X##p1, ROT##_0); \
- X##p1 ^= X##p0; \
- X##p2 += X##p3; \
- X##p3 = rotl_64(X##p3, ROT##_1); \
- X##p3 ^= X##p2; \
- X##p4 += X##p5; \
- X##p5 = rotl_64(X##p5, ROT##_2); \
- X##p5 ^= X##p4; \
- X##p6 += X##p7; \
- X##p7 = rotl_64(X##p7, ROT##_3); \
- X##p7 ^= X##p6; \
- X##p8 += X##p9; \
- X##p9 = rotl_64(X##p9, ROT##_4); \
- X##p9 ^= X##p8; \
- X##pA += X##pB; \
- X##pB = rotl_64(X##pB, ROT##_5); \
- X##pB ^= X##pA; \
- X##pC += X##pD; \
- X##pD = rotl_64(X##pD, ROT##_6); \
- X##pD ^= X##pC; \
- X##pE += X##pF; \
- X##pF = rotl_64(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
-
-/***************************** SKEIN_256 ******************************/
-#if !(SKEIN_USE_ASM & 256)
-void skein_256_process_block(struct skein_256_ctx *ctx, const u8 *blk_ptr,
- size_t blk_cnt, size_t byte_cnt_add)
-{ /* do it in C */
- enum {
- WCNT = SKEIN_256_STATE_WORDS
- };
- size_t r;
-#if SKEIN_UNROLL_256
- /* key schedule: chaining vars + tweak + "rot"*/
- u64 kw[WCNT+4+RCNT*2];
-#else
- /* key schedule words : chaining vars + tweak */
- u64 kw[WCNT+4];
-#endif
- u64 X0, X1, X2, X3; /* local copy of context vars, for speed */
- u64 w[WCNT]; /* local copy of input block */
-#ifdef SKEIN_DEBUG
- const u64 *X_ptr[4]; /* use for debugging (help cc put Xn in regs) */
-
- X_ptr[0] = &X0;
- X_ptr[1] = &X1;
- X_ptr[2] = &X2;
- X_ptr[3] = &X3;
-#endif
- skein_assert(blk_cnt != 0); /* never call with blk_cnt == 0! */
- ts[0] = ctx->h.tweak[0];
- ts[1] = ctx->h.tweak[1];
- do {
- /*
- * this implementation only supports 2**64 input bytes
- * (no carry out here)
- */
- ts[0] += byte_cnt_add; /* update processed length */
-
- /* precompute the key schedule for this block */
- ks[0] = ctx->x[0];
- ks[1] = ctx->x[1];
- ks[2] = ctx->x[2];
- ks[3] = ctx->x[3];
- ks[4] = ks[0] ^ ks[1] ^ ks[2] ^ ks[3] ^ SKEIN_KS_PARITY;
-
- ts[2] = ts[0] ^ ts[1];
-
- /* get input block in little-endian format */
- skein_get64_lsb_first(w, blk_ptr, WCNT);
- debug_save_tweak(ctx);
-
- /* do the first full key injection */
- X0 = w[0] + ks[0];
- X1 = w[1] + ks[1] + ts[0];
- X2 = w[2] + ks[2] + ts[1];
- X3 = w[3] + ks[3];
-
- blk_ptr += SKEIN_256_BLOCK_BYTES;
-
- /* run the rounds */
- for (r = 1;
- r < (SKEIN_UNROLL_256 ? 2 * RCNT : 2);
- r += (SKEIN_UNROLL_256 ? 2 * SKEIN_UNROLL_256 : 1)) {
- R256_8_ROUNDS(0);
-#if R256_UNROLL_R(1)
- R256_8_ROUNDS(1);
-#endif
-#if R256_UNROLL_R(2)
- R256_8_ROUNDS(2);
-#endif
-#if R256_UNROLL_R(3)
- R256_8_ROUNDS(3);
-#endif
-#if R256_UNROLL_R(4)
- R256_8_ROUNDS(4);
-#endif
-#if R256_UNROLL_R(5)
- R256_8_ROUNDS(5);
-#endif
-#if R256_UNROLL_R(6)
- R256_8_ROUNDS(6);
-#endif
-#if R256_UNROLL_R(7)
- R256_8_ROUNDS(7);
-#endif
-#if R256_UNROLL_R(8)
- R256_8_ROUNDS(8);
-#endif
-#if R256_UNROLL_R(9)
- R256_8_ROUNDS(9);
-#endif
-#if R256_UNROLL_R(10)
- R256_8_ROUNDS(10);
-#endif
-#if R256_UNROLL_R(11)
- R256_8_ROUNDS(11);
-#endif
-#if R256_UNROLL_R(12)
- R256_8_ROUNDS(12);
-#endif
-#if R256_UNROLL_R(13)
- R256_8_ROUNDS(13);
-#endif
-#if R256_UNROLL_R(14)
- R256_8_ROUNDS(14);
-#endif
- }
- /* do the final "feedforward" xor, update context chaining */
- ctx->x[0] = X0 ^ w[0];
- ctx->x[1] = X1 ^ w[1];
- ctx->x[2] = X2 ^ w[2];
- ctx->x[3] = X3 ^ w[3];
-
- ts[1] &= ~SKEIN_T1_FLAG_FIRST;
- } while (--blk_cnt);
- ctx->h.tweak[0] = ts[0];
- ctx->h.tweak[1] = ts[1];
-}
-
-#if defined(SKEIN_CODE_SIZE) || defined(SKEIN_PERF)
-size_t skein_256_process_block_code_size(void)
-{
- return ((u8 *) skein_256_process_block_code_size) -
- ((u8 *) skein_256_process_block);
-}
-unsigned int skein_256_unroll_cnt(void)
-{
- return SKEIN_UNROLL_256;
-}
-#endif
-#endif
-
/***************************** SKEIN_512 ******************************/
#if !(SKEIN_USE_ASM & 512)
void skein_512_process_block(struct skein_512_ctx *ctx, const u8 *blk_ptr,
@@ -480,9 +28,9 @@ void skein_512_process_block(struct skein_512_ctx *ctx, const u8 *blk_ptr,
};
size_t r;
#if SKEIN_UNROLL_512
- u64 kw[WCNT+4+RCNT*2]; /* key sched: chaining vars + tweak + "rot"*/
+ u64 kw[WCNT + 4 + RCNT * 2]; /* key sched: chaining vars + tweak + "rot"*/
#else
- u64 kw[WCNT+4]; /* key schedule words : chaining vars + tweak */
+ u64 kw[WCNT + 4]; /* key schedule words : chaining vars + tweak */
#endif
u64 X0, X1, X2, X3, X4, X5, X6, X7; /* local copies, for speed */
u64 w[WCNT]; /* local copy of input block */
@@ -543,7 +91,6 @@ void skein_512_process_block(struct skein_512_ctx *ctx, const u8 *blk_ptr,
for (r = 1;
r < (SKEIN_UNROLL_512 ? 2 * RCNT : 2);
r += (SKEIN_UNROLL_512 ? 2 * SKEIN_UNROLL_512 : 1)) {
-
R512_8_ROUNDS(0);
#if R512_UNROLL_R(1)
@@ -609,10 +156,12 @@ void skein_512_process_block(struct skein_512_ctx *ctx, const u8 *blk_ptr,
#if defined(SKEIN_CODE_SIZE) || defined(SKEIN_PERF)
size_t skein_512_process_block_code_size(void)
{
- return ((u8 *) skein_512_process_block_code_size) -
- ((u8 *) skein_512_process_block);
+ return ((u8 *)skein_512_process_block_code_size) -
+ ((u8 *)skein_512_process_block);
}
+
unsigned int skein_512_unroll_cnt(void)
+
{
return SKEIN_UNROLL_512;
}
@@ -629,9 +178,9 @@ void skein_1024_process_block(struct skein_1024_ctx *ctx, const u8 *blk_ptr,
};
size_t r;
#if (SKEIN_UNROLL_1024 != 0)
- u64 kw[WCNT+4+RCNT*2]; /* key sched: chaining vars + tweak + "rot" */
+ u64 kw[WCNT + 4 + RCNT * 2]; /* key sched: chaining vars + tweak + "rot" */
#else
- u64 kw[WCNT+4]; /* key schedule words : chaining vars + tweak */
+ u64 kw[WCNT + 4]; /* key schedule words : chaining vars + tweak */
#endif
/* local copy of vars, for speed */
@@ -771,10 +320,12 @@ void skein_1024_process_block(struct skein_1024_ctx *ctx, const u8 *blk_ptr,
#if defined(SKEIN_CODE_SIZE) || defined(SKEIN_PERF)
size_t skein_1024_process_block_code_size(void)
{
- return ((u8 *) skein_1024_process_block_code_size) -
- ((u8 *) skein_1024_process_block);
+ return ((u8 *)skein_1024_process_block_code_size) -
+ ((u8 *)skein_1024_process_block);
}
+
unsigned int skein_1024_unroll_cnt(void)
+
{
return SKEIN_UNROLL_1024;
}
diff --git a/drivers/staging/skein/skein_block.h b/drivers/staging/skein/skein_block.h
index 9d40f4a..e339ba6 100644
--- a/drivers/staging/skein/skein_block.h
+++ b/drivers/staging/skein/skein_block.h
@@ -20,3 +20,457 @@ void skein_1024_process_block(struct skein_1024_ctx *ctx, const u8 *blk_ptr,
size_t blk_cnt, size_t byte_cnt_add);
#endif
+
+#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 = rotl_64(X##p1, ROT##_0); \
+ X##p1 ^= X##p0; \
+ X##p2 += X##p3; \
+ X##p3 = rotl_64(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 = rotl_64(X##p1, ROT##_0); \
+ X##p1 ^= X##p0; \
+ X##p2 += X##p3; \
+ X##p3 = rotl_64(X##p3, ROT##_1); \
+ X##p3 ^= X##p2; \
+ X##p4 += X##p5; \
+ X##p5 = rotl_64(X##p5, ROT##_2); \
+ X##p5 ^= X##p4; \
+ X##p6 += X##p7; X##p7 = rotl_64(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 = rotl_64(X##p1, ROT##_0); \
+ X##p1 ^= X##p0; \
+ X##p2 += X##p3; \
+ X##p3 = rotl_64(X##p3, ROT##_1); \
+ X##p3 ^= X##p2; \
+ X##p4 += X##p5; \
+ X##p5 = rotl_64(X##p5, ROT##_2); \
+ X##p5 ^= X##p4; \
+ X##p6 += X##p7; \
+ X##p7 = rotl_64(X##p7, ROT##_3); \
+ X##p7 ^= X##p6; \
+ X##p8 += X##p9; \
+ X##p9 = rotl_64(X##p9, ROT##_4); \
+ X##p9 ^= X##p8; \
+ X##pA += X##pB; \
+ X##pB = rotl_64(X##pB, ROT##_5); \
+ X##pB ^= X##pA; \
+ X##pC += X##pD; \
+ X##pD = rotl_64(X##pD, ROT##_6); \
+ X##pD ^= X##pC; \
+ X##pE += X##pF; \
+ X##pF = rotl_64(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
+
+/***************************** SKEIN_256 ******************************/
+#if !(SKEIN_USE_ASM & 256)
+void skein_256_process_block(struct skein_256_ctx *ctx, const u8 *blk_ptr,
+ size_t blk_cnt, size_t byte_cnt_add)
+{ /* do it in C */
+ enum {
+ WCNT = SKEIN_256_STATE_WORDS
+ };
+ size_t r;
+#if SKEIN_UNROLL_256
+ /* key schedule: chaining vars + tweak + "rot"*/
+ u64 kw[WCNT + 4 + RCNT * 2];
+#else
+ /* key schedule words : chaining vars + tweak */
+ u64 kw[WCNT + 4];
+#endif
+ u64 X0, X1, X2, X3; /* local copy of context vars, for speed */
+ u64 w[WCNT]; /* local copy of input block */
+#ifdef SKEIN_DEBUG
+ const u64 *X_ptr[4]; /* use for debugging (help cc put Xn in regs) */
+
+ X_ptr[0] = &X0;
+ X_ptr[1] = &X1;
+ X_ptr[2] = &X2;
+ X_ptr[3] = &X3;
+#endif
+ skein_assert(blk_cnt != 0); /* never call with blk_cnt == 0! */
+ ts[0] = ctx->h.tweak[0];
+ ts[1] = ctx->h.tweak[1];
+ do {
+ /*
+ * this implementation only supports 2**64 input bytes
+ * (no carry out here)
+ */
+ ts[0] += byte_cnt_add; /* update processed length */
+
+ /* precompute the key schedule for this block */
+ ks[0] = ctx->x[0];
+ ks[1] = ctx->x[1];
+ ks[2] = ctx->x[2];
+ ks[3] = ctx->x[3];
+ ks[4] = ks[0] ^ ks[1] ^ ks[2] ^ ks[3] ^ SKEIN_KS_PARITY;
+
+ ts[2] = ts[0] ^ ts[1];
+
+ /* get input block in little-endian format */
+ skein_get64_lsb_first(w, blk_ptr, WCNT);
+ debug_save_tweak(ctx);
+
+ /* do the first full key injection */
+ X0 = w[0] + ks[0];
+ X1 = w[1] + ks[1] + ts[0];
+ X2 = w[2] + ks[2] + ts[1];
+ X3 = w[3] + ks[3];
+
+ blk_ptr += SKEIN_256_BLOCK_BYTES;
+
+ /* run the rounds */
+ for (r = 1;
+ r < (SKEIN_UNROLL_256 ? 2 * RCNT : 2);
+ r += (SKEIN_UNROLL_256 ? 2 * SKEIN_UNROLL_256 : 1)) {
+ R256_8_ROUNDS(0);
+#if R256_UNROLL_R(1)
+ R256_8_ROUNDS(1);
+#endif
+#if R256_UNROLL_R(2)
+ R256_8_ROUNDS(2);
+#endif
+#if R256_UNROLL_R(3)
+ R256_8_ROUNDS(3);
+#endif
+#if R256_UNROLL_R(4)
+ R256_8_ROUNDS(4);
+#endif
+#if R256_UNROLL_R(5)
+ R256_8_ROUNDS(5);
+#endif
+#if R256_UNROLL_R(6)
+ R256_8_ROUNDS(6);
+#endif
+#if R256_UNROLL_R(7)
+ R256_8_ROUNDS(7);
+#endif
+#if R256_UNROLL_R(8)
+ R256_8_ROUNDS(8);
+#endif
+#if R256_UNROLL_R(9)
+ R256_8_ROUNDS(9);
+#endif
+#if R256_UNROLL_R(10)
+ R256_8_ROUNDS(10);
+#endif
+#if R256_UNROLL_R(11)
+ R256_8_ROUNDS(11);
+#endif
+#if R256_UNROLL_R(12)
+ R256_8_ROUNDS(12);
+#endif
+#if R256_UNROLL_R(13)
+ R256_8_ROUNDS(13);
+#endif
+#if R256_UNROLL_R(14)
+ R256_8_ROUNDS(14);
+#endif
+ }
+ /* do the final "feedforward" xor, update context chaining */
+ ctx->x[0] = X0 ^ w[0];
+ ctx->x[1] = X1 ^ w[1];
+ ctx->x[2] = X2 ^ w[2];
+ ctx->x[3] = X3 ^ w[3];
+
+ ts[1] &= ~SKEIN_T1_FLAG_FIRST;
+ } while (--blk_cnt);
+ ctx->h.tweak[0] = ts[0];
+ ctx->h.tweak[1] = ts[1];
+}
+
+#if defined(SKEIN_CODE_SIZE) || defined(SKEIN_PERF)
+size_t skein_256_process_block_code_size(void)
+{
+ return ((u8 *)skein_256_process_block_code_size) -
+ ((u8 *)skein_256_process_block);
+}
+
+unsigned int skein_256_unroll_cnt(void)
+
+{
+ return SKEIN_UNROLL_256;
+}
+#endif
+#endif
--
2.5.0
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