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![Vatika Harlalka](/assets/img/avatar_default.png)
Remove unneeded do-while(0) loop from single statement macros. Signed-off-by: Vatika Harlalka <vatikaharlalka@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
782 lines
26 KiB
C
782 lines
26 KiB
C
/***********************************************************************
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**
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** Implementation of the Skein block functions.
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**
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** Source code author: Doug Whiting, 2008.
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**
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** This algorithm and source code is released to the public domain.
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**
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** Compile-time switches:
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**
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** SKEIN_USE_ASM -- set bits (256/512/1024) to select which
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** versions use ASM code for block processing
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** [default: use C for all block sizes]
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**
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************************************************************************/
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#include <linux/string.h>
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#include "skein_base.h"
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#include "skein_block.h"
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#ifndef SKEIN_USE_ASM
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#define SKEIN_USE_ASM (0) /* default is all C code (no ASM) */
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#endif
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#ifndef SKEIN_LOOP
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#define SKEIN_LOOP 001 /* default: unroll 256 and 512, but not 1024 */
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#endif
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#define BLK_BITS (WCNT * 64) /* some useful definitions for code here */
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#define KW_TWK_BASE (0)
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#define KW_KEY_BASE (3)
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#define ks (kw + KW_KEY_BASE)
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#define ts (kw + KW_TWK_BASE)
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#ifdef SKEIN_DEBUG
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#define debug_save_tweak(ctx) \
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{ \
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ctx->h.tweak[0] = ts[0]; \
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ctx->h.tweak[1] = ts[1]; \
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}
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#else
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#define debug_save_tweak(ctx)
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#endif
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#if !(SKEIN_USE_ASM & 256)
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#undef RCNT
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#define RCNT (SKEIN_256_ROUNDS_TOTAL / 8)
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#ifdef SKEIN_LOOP /* configure how much to unroll the loop */
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#define SKEIN_UNROLL_256 (((SKEIN_LOOP) / 100) % 10)
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#else
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#define SKEIN_UNROLL_256 (0)
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#endif
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#if SKEIN_UNROLL_256
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#if (RCNT % SKEIN_UNROLL_256)
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#error "Invalid SKEIN_UNROLL_256" /* sanity check on unroll count */
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#endif
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#endif
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#define ROUND256(p0, p1, p2, p3, ROT, r_num) \
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do { \
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X##p0 += X##p1; \
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X##p1 = rotl_64(X##p1, ROT##_0); \
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X##p1 ^= X##p0; \
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X##p2 += X##p3; \
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X##p3 = rotl_64(X##p3, ROT##_1); \
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X##p3 ^= X##p2; \
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} while (0)
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#if SKEIN_UNROLL_256 == 0
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#define R256(p0, p1, p2, p3, ROT, r_num) /* fully unrolled */ \
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ROUND256(p0, p1, p2, p3, ROT, r_num)
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#define I256(R) \
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do { \
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/* inject the key schedule value */ \
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X0 += ks[((R) + 1) % 5]; \
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X1 += ks[((R) + 2) % 5] + ts[((R) + 1) % 3]; \
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X2 += ks[((R) + 3) % 5] + ts[((R) + 2) % 3]; \
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X3 += ks[((R) + 4) % 5] + (R) + 1; \
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} while (0)
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#else
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/* looping version */
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#define R256(p0, p1, p2, p3, ROT, r_num) ROUND256(p0, p1, p2, p3, ROT, r_num)
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#define I256(R) \
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do { \
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/* inject the key schedule value */ \
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X0 += ks[r + (R) + 0]; \
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X1 += ks[r + (R) + 1] + ts[r + (R) + 0]; \
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X2 += ks[r + (R) + 2] + ts[r + (R) + 1]; \
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X3 += ks[r + (R) + 3] + r + (R); \
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/* rotate key schedule */ \
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ks[r + (R) + 4] = ks[r + (R) - 1]; \
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ts[r + (R) + 2] = ts[r + (R) - 1]; \
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} while (0)
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#endif
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#define R256_8_ROUNDS(R) \
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do { \
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R256(0, 1, 2, 3, R_256_0, 8 * (R) + 1); \
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R256(0, 3, 2, 1, R_256_1, 8 * (R) + 2); \
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R256(0, 1, 2, 3, R_256_2, 8 * (R) + 3); \
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R256(0, 3, 2, 1, R_256_3, 8 * (R) + 4); \
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I256(2 * (R)); \
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R256(0, 1, 2, 3, R_256_4, 8 * (R) + 5); \
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R256(0, 3, 2, 1, R_256_5, 8 * (R) + 6); \
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R256(0, 1, 2, 3, R_256_6, 8 * (R) + 7); \
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R256(0, 3, 2, 1, R_256_7, 8 * (R) + 8); \
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I256(2 * (R) + 1); \
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} while (0)
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#define R256_UNROLL_R(NN) \
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((SKEIN_UNROLL_256 == 0 && \
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SKEIN_256_ROUNDS_TOTAL / 8 > (NN)) || \
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(SKEIN_UNROLL_256 > (NN)))
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#if (SKEIN_UNROLL_256 > 14)
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#error "need more unrolling in skein_256_process_block"
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#endif
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#endif
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#if !(SKEIN_USE_ASM & 512)
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#undef RCNT
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#define RCNT (SKEIN_512_ROUNDS_TOTAL/8)
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#ifdef SKEIN_LOOP /* configure how much to unroll the loop */
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#define SKEIN_UNROLL_512 (((SKEIN_LOOP)/10)%10)
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#else
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#define SKEIN_UNROLL_512 (0)
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#endif
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#if SKEIN_UNROLL_512
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#if (RCNT % SKEIN_UNROLL_512)
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#error "Invalid SKEIN_UNROLL_512" /* sanity check on unroll count */
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#endif
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#endif
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#define ROUND512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num) \
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do { \
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X##p0 += X##p1; \
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X##p1 = rotl_64(X##p1, ROT##_0); \
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X##p1 ^= X##p0; \
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X##p2 += X##p3; \
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X##p3 = rotl_64(X##p3, ROT##_1); \
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X##p3 ^= X##p2; \
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X##p4 += X##p5; \
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X##p5 = rotl_64(X##p5, ROT##_2); \
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X##p5 ^= X##p4; \
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X##p6 += X##p7; X##p7 = rotl_64(X##p7, ROT##_3); \
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X##p7 ^= X##p6; \
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} while (0)
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#if SKEIN_UNROLL_512 == 0
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#define R512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num) /* unrolled */ \
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ROUND512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num)
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#define I512(R) \
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do { \
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/* inject the key schedule value */ \
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X0 += ks[((R) + 1) % 9]; \
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X1 += ks[((R) + 2) % 9]; \
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X2 += ks[((R) + 3) % 9]; \
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X3 += ks[((R) + 4) % 9]; \
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X4 += ks[((R) + 5) % 9]; \
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X5 += ks[((R) + 6) % 9] + ts[((R) + 1) % 3]; \
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X6 += ks[((R) + 7) % 9] + ts[((R) + 2) % 3]; \
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X7 += ks[((R) + 8) % 9] + (R) + 1; \
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} while (0)
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#else /* looping version */
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#define R512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num) \
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ROUND512(p0, p1, p2, p3, p4, p5, p6, p7, ROT, r_num) \
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#define I512(R) \
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do { \
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/* inject the key schedule value */ \
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X0 += ks[r + (R) + 0]; \
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X1 += ks[r + (R) + 1]; \
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X2 += ks[r + (R) + 2]; \
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X3 += ks[r + (R) + 3]; \
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X4 += ks[r + (R) + 4]; \
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X5 += ks[r + (R) + 5] + ts[r + (R) + 0]; \
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X6 += ks[r + (R) + 6] + ts[r + (R) + 1]; \
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X7 += ks[r + (R) + 7] + r + (R); \
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/* rotate key schedule */ \
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ks[r + (R) + 8] = ks[r + (R) - 1]; \
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ts[r + (R) + 2] = ts[r + (R) - 1]; \
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} while (0)
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#endif /* end of looped code definitions */
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#define R512_8_ROUNDS(R) /* do 8 full rounds */ \
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do { \
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R512(0, 1, 2, 3, 4, 5, 6, 7, R_512_0, 8 * (R) + 1); \
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R512(2, 1, 4, 7, 6, 5, 0, 3, R_512_1, 8 * (R) + 2); \
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R512(4, 1, 6, 3, 0, 5, 2, 7, R_512_2, 8 * (R) + 3); \
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R512(6, 1, 0, 7, 2, 5, 4, 3, R_512_3, 8 * (R) + 4); \
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I512(2 * (R)); \
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R512(0, 1, 2, 3, 4, 5, 6, 7, R_512_4, 8 * (R) + 5); \
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R512(2, 1, 4, 7, 6, 5, 0, 3, R_512_5, 8 * (R) + 6); \
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R512(4, 1, 6, 3, 0, 5, 2, 7, R_512_6, 8 * (R) + 7); \
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R512(6, 1, 0, 7, 2, 5, 4, 3, R_512_7, 8 * (R) + 8); \
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I512(2 * (R) + 1); /* and key injection */ \
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} while (0)
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#define R512_UNROLL_R(NN) \
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((SKEIN_UNROLL_512 == 0 && \
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SKEIN_512_ROUNDS_TOTAL/8 > (NN)) || \
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(SKEIN_UNROLL_512 > (NN)))
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#if (SKEIN_UNROLL_512 > 14)
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#error "need more unrolling in skein_512_process_block"
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#endif
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#endif
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#if !(SKEIN_USE_ASM & 1024)
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#undef RCNT
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#define RCNT (SKEIN_1024_ROUNDS_TOTAL/8)
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#ifdef SKEIN_LOOP /* configure how much to unroll the loop */
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#define SKEIN_UNROLL_1024 ((SKEIN_LOOP)%10)
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#else
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#define SKEIN_UNROLL_1024 (0)
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#endif
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#if (SKEIN_UNROLL_1024 != 0)
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#if (RCNT % SKEIN_UNROLL_1024)
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#error "Invalid SKEIN_UNROLL_1024" /* sanity check on unroll count */
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#endif
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#endif
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#define ROUND1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, \
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pF, ROT, r_num) \
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do { \
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X##p0 += X##p1; \
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X##p1 = rotl_64(X##p1, ROT##_0); \
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X##p1 ^= X##p0; \
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X##p2 += X##p3; \
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X##p3 = rotl_64(X##p3, ROT##_1); \
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X##p3 ^= X##p2; \
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X##p4 += X##p5; \
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X##p5 = rotl_64(X##p5, ROT##_2); \
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X##p5 ^= X##p4; \
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X##p6 += X##p7; \
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X##p7 = rotl_64(X##p7, ROT##_3); \
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X##p7 ^= X##p6; \
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X##p8 += X##p9; \
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X##p9 = rotl_64(X##p9, ROT##_4); \
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X##p9 ^= X##p8; \
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X##pA += X##pB; \
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X##pB = rotl_64(X##pB, ROT##_5); \
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X##pB ^= X##pA; \
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X##pC += X##pD; \
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X##pD = rotl_64(X##pD, ROT##_6); \
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X##pD ^= X##pC; \
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X##pE += X##pF; \
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X##pF = rotl_64(X##pF, ROT##_7); \
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X##pF ^= X##pE; \
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} while (0)
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#if SKEIN_UNROLL_1024 == 0
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#define R1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, pF, \
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ROT, rn) \
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ROUND1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, \
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pF, ROT, rn) \
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#define I1024(R) \
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do { \
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/* inject the key schedule value */ \
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X00 += ks[((R) + 1) % 17]; \
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X01 += ks[((R) + 2) % 17]; \
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X02 += ks[((R) + 3) % 17]; \
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X03 += ks[((R) + 4) % 17]; \
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X04 += ks[((R) + 5) % 17]; \
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X05 += ks[((R) + 6) % 17]; \
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X06 += ks[((R) + 7) % 17]; \
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X07 += ks[((R) + 8) % 17]; \
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X08 += ks[((R) + 9) % 17]; \
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X09 += ks[((R) + 10) % 17]; \
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X10 += ks[((R) + 11) % 17]; \
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X11 += ks[((R) + 12) % 17]; \
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X12 += ks[((R) + 13) % 17]; \
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X13 += ks[((R) + 14) % 17] + ts[((R) + 1) % 3]; \
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X14 += ks[((R) + 15) % 17] + ts[((R) + 2) % 3]; \
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X15 += ks[((R) + 16) % 17] + (R) + 1; \
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} while (0)
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#else /* looping version */
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#define R1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, pF, \
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ROT, rn) \
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ROUND1024(p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, pA, pB, pC, pD, pE, \
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pF, ROT, rn) \
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#define I1024(R) \
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do { \
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/* inject the key schedule value */ \
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X00 += ks[r + (R) + 0]; \
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X01 += ks[r + (R) + 1]; \
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X02 += ks[r + (R) + 2]; \
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X03 += ks[r + (R) + 3]; \
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X04 += ks[r + (R) + 4]; \
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X05 += ks[r + (R) + 5]; \
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X06 += ks[r + (R) + 6]; \
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X07 += ks[r + (R) + 7]; \
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X08 += ks[r + (R) + 8]; \
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X09 += ks[r + (R) + 9]; \
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X10 += ks[r + (R) + 10]; \
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X11 += ks[r + (R) + 11]; \
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X12 += ks[r + (R) + 12]; \
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X13 += ks[r + (R) + 13] + ts[r + (R) + 0]; \
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X14 += ks[r + (R) + 14] + ts[r + (R) + 1]; \
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X15 += ks[r + (R) + 15] + r + (R); \
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/* rotate key schedule */ \
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ks[r + (R) + 16] = ks[r + (R) - 1]; \
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ts[r + (R) + 2] = ts[r + (R) - 1]; \
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} while (0)
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#endif
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#define R1024_8_ROUNDS(R) \
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do { \
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R1024(00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, \
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R1024_0, 8*(R) + 1); \
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R1024(00, 09, 02, 13, 06, 11, 04, 15, 10, 07, 12, 03, 14, 05, 08, 01, \
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R1024_1, 8*(R) + 2); \
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R1024(00, 07, 02, 05, 04, 03, 06, 01, 12, 15, 14, 13, 08, 11, 10, 09, \
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R1024_2, 8*(R) + 3); \
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R1024(00, 15, 02, 11, 06, 13, 04, 09, 14, 01, 08, 05, 10, 03, 12, 07, \
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R1024_3, 8*(R) + 4); \
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I1024(2*(R)); \
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R1024(00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, \
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R1024_4, 8*(R) + 5); \
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R1024(00, 09, 02, 13, 06, 11, 04, 15, 10, 07, 12, 03, 14, 05, 08, 01, \
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R1024_5, 8*(R) + 6); \
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R1024(00, 07, 02, 05, 04, 03, 06, 01, 12, 15, 14, 13, 08, 11, 10, 09, \
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R1024_6, 8*(R) + 7); \
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R1024(00, 15, 02, 11, 06, 13, 04, 09, 14, 01, 08, 05, 10, 03, 12, 07, \
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R1024_7, 8*(R) + 8); \
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I1024(2*(R)+1); \
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} while (0)
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#define R1024_UNROLL_R(NN) \
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((SKEIN_UNROLL_1024 == 0 && \
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SKEIN_1024_ROUNDS_TOTAL/8 > (NN)) || \
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(SKEIN_UNROLL_1024 > (NN)))
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#if (SKEIN_UNROLL_1024 > 14)
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#error "need more unrolling in Skein_1024_Process_Block"
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#endif
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#endif
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/***************************** SKEIN_256 ******************************/
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#if !(SKEIN_USE_ASM & 256)
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void skein_256_process_block(struct skein_256_ctx *ctx, const u8 *blk_ptr,
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size_t blk_cnt, size_t byte_cnt_add)
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{ /* do it in C */
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enum {
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WCNT = SKEIN_256_STATE_WORDS
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};
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size_t r;
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#if SKEIN_UNROLL_256
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/* key schedule: chaining vars + tweak + "rot"*/
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u64 kw[WCNT+4+RCNT*2];
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#else
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/* key schedule words : chaining vars + tweak */
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u64 kw[WCNT+4];
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#endif
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u64 X0, X1, X2, X3; /* local copy of context vars, for speed */
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u64 w[WCNT]; /* local copy of input block */
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#ifdef SKEIN_DEBUG
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const u64 *X_ptr[4]; /* use for debugging (help cc put Xn in regs) */
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X_ptr[0] = &X0;
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X_ptr[1] = &X1;
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X_ptr[2] = &X2;
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X_ptr[3] = &X3;
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#endif
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skein_assert(blk_cnt != 0); /* never call with blk_cnt == 0! */
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ts[0] = ctx->h.tweak[0];
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ts[1] = ctx->h.tweak[1];
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do {
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/*
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|
* 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,
|
|
size_t blk_cnt, size_t byte_cnt_add)
|
|
{ /* do it in C */
|
|
enum {
|
|
WCNT = SKEIN_512_STATE_WORDS
|
|
};
|
|
size_t r;
|
|
#if SKEIN_UNROLL_512
|
|
u64 kw[WCNT+4+RCNT*2]; /* key sched: chaining vars + tweak + "rot"*/
|
|
#else
|
|
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 */
|
|
#ifdef SKEIN_DEBUG
|
|
const u64 *X_ptr[8]; /* 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;
|
|
X_ptr[4] = &X4;
|
|
X_ptr[5] = &X5;
|
|
X_ptr[6] = &X6;
|
|
X_ptr[7] = &X7;
|
|
#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] = ctx->x[4];
|
|
ks[5] = ctx->x[5];
|
|
ks[6] = ctx->x[6];
|
|
ks[7] = ctx->x[7];
|
|
ks[8] = ks[0] ^ ks[1] ^ ks[2] ^ ks[3] ^
|
|
ks[4] ^ ks[5] ^ ks[6] ^ ks[7] ^ 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];
|
|
X2 = w[2] + ks[2];
|
|
X3 = w[3] + ks[3];
|
|
X4 = w[4] + ks[4];
|
|
X5 = w[5] + ks[5] + ts[0];
|
|
X6 = w[6] + ks[6] + ts[1];
|
|
X7 = w[7] + ks[7];
|
|
|
|
blk_ptr += SKEIN_512_BLOCK_BYTES;
|
|
|
|
/* run the rounds */
|
|
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)
|
|
R512_8_ROUNDS(1);
|
|
#endif
|
|
#if R512_UNROLL_R(2)
|
|
R512_8_ROUNDS(2);
|
|
#endif
|
|
#if R512_UNROLL_R(3)
|
|
R512_8_ROUNDS(3);
|
|
#endif
|
|
#if R512_UNROLL_R(4)
|
|
R512_8_ROUNDS(4);
|
|
#endif
|
|
#if R512_UNROLL_R(5)
|
|
R512_8_ROUNDS(5);
|
|
#endif
|
|
#if R512_UNROLL_R(6)
|
|
R512_8_ROUNDS(6);
|
|
#endif
|
|
#if R512_UNROLL_R(7)
|
|
R512_8_ROUNDS(7);
|
|
#endif
|
|
#if R512_UNROLL_R(8)
|
|
R512_8_ROUNDS(8);
|
|
#endif
|
|
#if R512_UNROLL_R(9)
|
|
R512_8_ROUNDS(9);
|
|
#endif
|
|
#if R512_UNROLL_R(10)
|
|
R512_8_ROUNDS(10);
|
|
#endif
|
|
#if R512_UNROLL_R(11)
|
|
R512_8_ROUNDS(11);
|
|
#endif
|
|
#if R512_UNROLL_R(12)
|
|
R512_8_ROUNDS(12);
|
|
#endif
|
|
#if R512_UNROLL_R(13)
|
|
R512_8_ROUNDS(13);
|
|
#endif
|
|
#if R512_UNROLL_R(14)
|
|
R512_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];
|
|
ctx->x[4] = X4 ^ w[4];
|
|
ctx->x[5] = X5 ^ w[5];
|
|
ctx->x[6] = X6 ^ w[6];
|
|
ctx->x[7] = X7 ^ w[7];
|
|
|
|
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_512_process_block_code_size(void)
|
|
{
|
|
return ((u8 *) skein_512_process_block_code_size) -
|
|
((u8 *) skein_512_process_block);
|
|
}
|
|
unsigned int skein_512_unroll_cnt(void)
|
|
{
|
|
return SKEIN_UNROLL_512;
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
/***************************** SKEIN_1024 ******************************/
|
|
#if !(SKEIN_USE_ASM & 1024)
|
|
void skein_1024_process_block(struct skein_1024_ctx *ctx, const u8 *blk_ptr,
|
|
size_t blk_cnt, size_t byte_cnt_add)
|
|
{ /* do it in C, always looping (unrolled is bigger AND slower!) */
|
|
enum {
|
|
WCNT = SKEIN_1024_STATE_WORDS
|
|
};
|
|
size_t r;
|
|
#if (SKEIN_UNROLL_1024 != 0)
|
|
u64 kw[WCNT+4+RCNT*2]; /* key sched: chaining vars + tweak + "rot" */
|
|
#else
|
|
u64 kw[WCNT+4]; /* key schedule words : chaining vars + tweak */
|
|
#endif
|
|
|
|
/* local copy of vars, for speed */
|
|
u64 X00, X01, X02, X03, X04, X05, X06, X07,
|
|
X08, X09, X10, X11, X12, X13, X14, X15;
|
|
u64 w[WCNT]; /* local copy of input block */
|
|
|
|
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] = ctx->x[4];
|
|
ks[5] = ctx->x[5];
|
|
ks[6] = ctx->x[6];
|
|
ks[7] = ctx->x[7];
|
|
ks[8] = ctx->x[8];
|
|
ks[9] = ctx->x[9];
|
|
ks[10] = ctx->x[10];
|
|
ks[11] = ctx->x[11];
|
|
ks[12] = ctx->x[12];
|
|
ks[13] = ctx->x[13];
|
|
ks[14] = ctx->x[14];
|
|
ks[15] = ctx->x[15];
|
|
ks[16] = ks[0] ^ ks[1] ^ ks[2] ^ ks[3] ^
|
|
ks[4] ^ ks[5] ^ ks[6] ^ ks[7] ^
|
|
ks[8] ^ ks[9] ^ ks[10] ^ ks[11] ^
|
|
ks[12] ^ ks[13] ^ ks[14] ^ ks[15] ^ 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 */
|
|
X00 = w[0] + ks[0];
|
|
X01 = w[1] + ks[1];
|
|
X02 = w[2] + ks[2];
|
|
X03 = w[3] + ks[3];
|
|
X04 = w[4] + ks[4];
|
|
X05 = w[5] + ks[5];
|
|
X06 = w[6] + ks[6];
|
|
X07 = w[7] + ks[7];
|
|
X08 = w[8] + ks[8];
|
|
X09 = w[9] + ks[9];
|
|
X10 = w[10] + ks[10];
|
|
X11 = w[11] + ks[11];
|
|
X12 = w[12] + ks[12];
|
|
X13 = w[13] + ks[13] + ts[0];
|
|
X14 = w[14] + ks[14] + ts[1];
|
|
X15 = w[15] + ks[15];
|
|
|
|
for (r = 1;
|
|
r < (SKEIN_UNROLL_1024 ? 2 * RCNT : 2);
|
|
r += (SKEIN_UNROLL_1024 ? 2 * SKEIN_UNROLL_1024 : 1)) {
|
|
R1024_8_ROUNDS(0);
|
|
#if R1024_UNROLL_R(1)
|
|
R1024_8_ROUNDS(1);
|
|
#endif
|
|
#if R1024_UNROLL_R(2)
|
|
R1024_8_ROUNDS(2);
|
|
#endif
|
|
#if R1024_UNROLL_R(3)
|
|
R1024_8_ROUNDS(3);
|
|
#endif
|
|
#if R1024_UNROLL_R(4)
|
|
R1024_8_ROUNDS(4);
|
|
#endif
|
|
#if R1024_UNROLL_R(5)
|
|
R1024_8_ROUNDS(5);
|
|
#endif
|
|
#if R1024_UNROLL_R(6)
|
|
R1024_8_ROUNDS(6);
|
|
#endif
|
|
#if R1024_UNROLL_R(7)
|
|
R1024_8_ROUNDS(7);
|
|
#endif
|
|
#if R1024_UNROLL_R(8)
|
|
R1024_8_ROUNDS(8);
|
|
#endif
|
|
#if R1024_UNROLL_R(9)
|
|
R1024_8_ROUNDS(9);
|
|
#endif
|
|
#if R1024_UNROLL_R(10)
|
|
R1024_8_ROUNDS(10);
|
|
#endif
|
|
#if R1024_UNROLL_R(11)
|
|
R1024_8_ROUNDS(11);
|
|
#endif
|
|
#if R1024_UNROLL_R(12)
|
|
R1024_8_ROUNDS(12);
|
|
#endif
|
|
#if R1024_UNROLL_R(13)
|
|
R1024_8_ROUNDS(13);
|
|
#endif
|
|
#if R1024_UNROLL_R(14)
|
|
R1024_8_ROUNDS(14);
|
|
#endif
|
|
}
|
|
/* do the final "feedforward" xor, update context chaining */
|
|
|
|
ctx->x[0] = X00 ^ w[0];
|
|
ctx->x[1] = X01 ^ w[1];
|
|
ctx->x[2] = X02 ^ w[2];
|
|
ctx->x[3] = X03 ^ w[3];
|
|
ctx->x[4] = X04 ^ w[4];
|
|
ctx->x[5] = X05 ^ w[5];
|
|
ctx->x[6] = X06 ^ w[6];
|
|
ctx->x[7] = X07 ^ w[7];
|
|
ctx->x[8] = X08 ^ w[8];
|
|
ctx->x[9] = X09 ^ w[9];
|
|
ctx->x[10] = X10 ^ w[10];
|
|
ctx->x[11] = X11 ^ w[11];
|
|
ctx->x[12] = X12 ^ w[12];
|
|
ctx->x[13] = X13 ^ w[13];
|
|
ctx->x[14] = X14 ^ w[14];
|
|
ctx->x[15] = X15 ^ w[15];
|
|
|
|
ts[1] &= ~SKEIN_T1_FLAG_FIRST;
|
|
blk_ptr += SKEIN_1024_BLOCK_BYTES;
|
|
} 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_1024_process_block_code_size(void)
|
|
{
|
|
return ((u8 *) skein_1024_process_block_code_size) -
|
|
((u8 *) skein_1024_process_block);
|
|
}
|
|
unsigned int skein_1024_unroll_cnt(void)
|
|
{
|
|
return SKEIN_UNROLL_1024;
|
|
}
|
|
#endif
|
|
#endif
|