| /*********************************************************************** |
| ** |
| ** Implementation of the Skein block functions. |
| ** |
| ** Source code author: Doug Whiting, 2008. |
| ** |
| ** This algorithm and source code is released to the public domain. |
| ** |
| ** Compile-time switches: |
| ** |
| ** SKEIN_USE_ASM -- set bits (256/512/1024) to select which |
| ** versions use ASM code for block processing |
| ** [default: use C for all block sizes] |
| ** |
| ************************************************************************/ |
| |
| #include <linux/string.h> |
| #include <skein.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 DebugSaveTweak(ctx) { ctx->h.T[0] = ts[0]; ctx->h.T[1] = ts[1]; } |
| #else |
| #define DebugSaveTweak(ctx) |
| #endif |
| |
| /***************************** Skein_256 ******************************/ |
| #if !(SKEIN_USE_ASM & 256) |
| void Skein_256_Process_Block(Skein_256_Ctxt_t *ctx,const u8 *blkPtr,size_t blkCnt,size_t byteCntAdd) |
| { /* do it in C */ |
| enum |
| { |
| WCNT = SKEIN_256_STATE_WORDS |
| }; |
| #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 |
| size_t r; |
| u64 kw[WCNT+4+RCNT*2]; /* key schedule words : chaining vars + tweak + "rotation"*/ |
| #else |
| u64 kw[WCNT+4]; /* key schedule words : chaining vars + tweak */ |
| #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 *Xptr[4]; /* use for debugging (help compiler put Xn in registers) */ |
| Xptr[0] = &X0; Xptr[1] = &X1; Xptr[2] = &X2; Xptr[3] = &X3; |
| #endif |
| Skein_assert(blkCnt != 0); /* never call with blkCnt == 0! */ |
| ts[0] = ctx->h.T[0]; |
| ts[1] = ctx->h.T[1]; |
| do { |
| /* this implementation only supports 2**64 input bytes (no carry out here) */ |
| ts[0] += byteCntAdd; /* 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]; |
| |
| Skein_Get64_LSB_First(w,blkPtr,WCNT); /* get input block in little-endian format */ |
| DebugSaveTweak(ctx); |
| Skein_Show_Block(BLK_BITS,&ctx->h,ctx->X,blkPtr,w,ks,ts); |
| |
| X0 = w[0] + ks[0]; /* do the first full key injection */ |
| X1 = w[1] + ks[1] + ts[0]; |
| X2 = w[2] + ks[2] + ts[1]; |
| X3 = w[3] + ks[3]; |
| |
| Skein_Show_R_Ptr(BLK_BITS,&ctx->h,SKEIN_RND_KEY_INITIAL,Xptr); /* show starting state values */ |
| |
| blkPtr += SKEIN_256_BLOCK_BYTES; |
| |
| /* run the rounds */ |
| |
| #define Round256(p0,p1,p2,p3,ROT,rNum) \ |
| 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; \ |
| |
| #if SKEIN_UNROLL_256 == 0 |
| #define R256(p0,p1,p2,p3,ROT,rNum) /* fully unrolled */ \ |
| Round256(p0,p1,p2,p3,ROT,rNum) \ |
| Skein_Show_R_Ptr(BLK_BITS,&ctx->h,rNum,Xptr); |
| |
| #define I256(R) \ |
| X0 += ks[((R)+1) % 5]; /* inject the key schedule value */ \ |
| 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; \ |
| Skein_Show_R_Ptr(BLK_BITS,&ctx->h,SKEIN_RND_KEY_INJECT,Xptr); |
| #else /* looping version */ |
| #define R256(p0,p1,p2,p3,ROT,rNum) \ |
| Round256(p0,p1,p2,p3,ROT,rNum) \ |
| Skein_Show_R_Ptr(BLK_BITS,&ctx->h,4*(r-1)+rNum,Xptr); |
| |
| #define I256(R) \ |
| X0 += ks[r+(R)+0]; /* inject the key schedule value */ \ |
| 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) ; \ |
| ks[r + (R)+4 ] = ks[r+(R)-1]; /* rotate key schedule */\ |
| ts[r + (R)+2 ] = ts[r+(R)-1]; \ |
| Skein_Show_R_Ptr(BLK_BITS,&ctx->h,SKEIN_RND_KEY_INJECT,Xptr); |
| |
| for (r=1;r < 2*RCNT;r+=2*SKEIN_UNROLL_256) /* loop thru it */ |
| #endif |
| { |
| #define R256_8_rounds(R) \ |
| 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); |
| |
| R256_8_rounds( 0); |
| |
| #define R256_Unroll_R(NN) ((SKEIN_UNROLL_256 == 0 && SKEIN_256_ROUNDS_TOTAL/8 > (NN)) || (SKEIN_UNROLL_256 > (NN))) |
| |
| #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 |
| #if (SKEIN_UNROLL_256 > 14) |
| #error "need more unrolling in Skein_256_Process_Block" |
| #endif |
| } |
| /* do the final "feedforward" xor, update context chaining vars */ |
| ctx->X[0] = X0 ^ w[0]; |
| ctx->X[1] = X1 ^ w[1]; |
| ctx->X[2] = X2 ^ w[2]; |
| ctx->X[3] = X3 ^ w[3]; |
| |
| Skein_Show_Round(BLK_BITS,&ctx->h,SKEIN_RND_FEED_FWD,ctx->X); |
| |
| ts[1] &= ~SKEIN_T1_FLAG_FIRST; |
| } |
| while (--blkCnt); |
| ctx->h.T[0] = ts[0]; |
| ctx->h.T[1] = ts[1]; |
| } |
| |
| #if defined(SKEIN_CODE_SIZE) || defined(SKEIN_PERF) |
| size_t Skein_256_Process_Block_CodeSize(void) |
| { |
| return ((u8 *) Skein_256_Process_Block_CodeSize) - |
| ((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(Skein_512_Ctxt_t *ctx,const u8 *blkPtr,size_t blkCnt,size_t byteCntAdd) |
| { /* do it in C */ |
| enum |
| { |
| WCNT = SKEIN_512_STATE_WORDS |
| }; |
| #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 |
| size_t r; |
| u64 kw[WCNT+4+RCNT*2]; /* key schedule words : chaining vars + tweak + "rotation"*/ |
| #else |
| u64 kw[WCNT+4]; /* key schedule words : chaining vars + tweak */ |
| #endif |
| u64 X0,X1,X2,X3,X4,X5,X6,X7; /* local copy of vars, for speed */ |
| u64 w [WCNT]; /* local copy of input block */ |
| #ifdef SKEIN_DEBUG |
| const u64 *Xptr[8]; /* use for debugging (help compiler put Xn in registers) */ |
| Xptr[0] = &X0; Xptr[1] = &X1; Xptr[2] = &X2; Xptr[3] = &X3; |
| Xptr[4] = &X4; Xptr[5] = &X5; Xptr[6] = &X6; Xptr[7] = &X7; |
| #endif |
| |
| Skein_assert(blkCnt != 0); /* never call with blkCnt == 0! */ |
| ts[0] = ctx->h.T[0]; |
| ts[1] = ctx->h.T[1]; |
| do { |
| /* this implementation only supports 2**64 input bytes (no carry out here) */ |
| ts[0] += byteCntAdd; /* 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]; |
| |
| Skein_Get64_LSB_First(w,blkPtr,WCNT); /* get input block in little-endian format */ |
| DebugSaveTweak(ctx); |
| Skein_Show_Block(BLK_BITS,&ctx->h,ctx->X,blkPtr,w,ks,ts); |
| |
| X0 = w[0] + ks[0]; /* do the first full key injection */ |
| 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]; |
| |
| blkPtr += SKEIN_512_BLOCK_BYTES; |
| |
| Skein_Show_R_Ptr(BLK_BITS,&ctx->h,SKEIN_RND_KEY_INITIAL,Xptr); |
| /* run the rounds */ |
| #define Round512(p0,p1,p2,p3,p4,p5,p6,p7,ROT,rNum) \ |
| 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; \ |
| |
| #if SKEIN_UNROLL_512 == 0 |
| #define R512(p0,p1,p2,p3,p4,p5,p6,p7,ROT,rNum) /* unrolled */ \ |
| Round512(p0,p1,p2,p3,p4,p5,p6,p7,ROT,rNum) \ |
| Skein_Show_R_Ptr(BLK_BITS,&ctx->h,rNum,Xptr); |
| |
| #define I512(R) \ |
| X0 += ks[((R)+1) % 9]; /* inject the key schedule value */ \ |
| 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; \ |
| Skein_Show_R_Ptr(BLK_BITS,&ctx->h,SKEIN_RND_KEY_INJECT,Xptr); |
| #else /* looping version */ |
| #define R512(p0,p1,p2,p3,p4,p5,p6,p7,ROT,rNum) \ |
| Round512(p0,p1,p2,p3,p4,p5,p6,p7,ROT,rNum) \ |
| Skein_Show_R_Ptr(BLK_BITS,&ctx->h,4*(r-1)+rNum,Xptr); |
| |
| #define I512(R) \ |
| X0 += ks[r+(R)+0]; /* inject the key schedule value */ \ |
| 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) ; \ |
| ks[r + (R)+8] = ks[r+(R)-1]; /* rotate key schedule */ \ |
| ts[r + (R)+2] = ts[r+(R)-1]; \ |
| Skein_Show_R_Ptr(BLK_BITS,&ctx->h,SKEIN_RND_KEY_INJECT,Xptr); |
| |
| for (r=1;r < 2*RCNT;r+=2*SKEIN_UNROLL_512) /* loop thru it */ |
| #endif /* end of looped code definitions */ |
| { |
| #define R512_8_rounds(R) /* do 8 full rounds */ \ |
| 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 */ |
| |
| R512_8_rounds( 0); |
| |
| #define R512_Unroll_R(NN) ((SKEIN_UNROLL_512 == 0 && SKEIN_512_ROUNDS_TOTAL/8 > (NN)) || (SKEIN_UNROLL_512 > (NN))) |
| |
| #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 |
| #if (SKEIN_UNROLL_512 > 14) |
| #error "need more unrolling in Skein_512_Process_Block" |
| #endif |
| } |
| |
| /* do the final "feedforward" xor, update context chaining vars */ |
| 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]; |
| Skein_Show_Round(BLK_BITS,&ctx->h,SKEIN_RND_FEED_FWD,ctx->X); |
| |
| ts[1] &= ~SKEIN_T1_FLAG_FIRST; |
| } |
| while (--blkCnt); |
| ctx->h.T[0] = ts[0]; |
| ctx->h.T[1] = ts[1]; |
| } |
| |
| #if defined(SKEIN_CODE_SIZE) || defined(SKEIN_PERF) |
| size_t Skein_512_Process_Block_CodeSize(void) |
| { |
| return ((u8 *) Skein_512_Process_Block_CodeSize) - |
| ((u8 *) Skein_512_Process_Block); |
| } |
| unsigned int Skein_512_Unroll_Cnt(void) |
| { |
| return SKEIN_UNROLL_512; |
| } |
| #endif |
| #endif |
| |
| /***************************** Skein1024 ******************************/ |
| #if !(SKEIN_USE_ASM & 1024) |
| void Skein1024_Process_Block(Skein1024_Ctxt_t *ctx,const u8 *blkPtr,size_t blkCnt,size_t byteCntAdd) |
| { /* do it in C, always looping (unrolled is bigger AND slower!) */ |
| enum |
| { |
| WCNT = SKEIN1024_STATE_WORDS |
| }; |
| #undef RCNT |
| #define RCNT (SKEIN1024_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 |
| size_t r; |
| u64 kw[WCNT+4+RCNT*2]; /* key schedule words : chaining vars + tweak + "rotation"*/ |
| #else |
| u64 kw[WCNT+4]; /* key schedule words : chaining vars + tweak */ |
| #endif |
| |
| u64 X00,X01,X02,X03,X04,X05,X06,X07, /* local copy of vars, for speed */ |
| X08,X09,X10,X11,X12,X13,X14,X15; |
| u64 w [WCNT]; /* local copy of input block */ |
| #ifdef SKEIN_DEBUG |
| const u64 *Xptr[16]; /* use for debugging (help compiler put Xn in registers) */ |
| Xptr[ 0] = &X00; Xptr[ 1] = &X01; Xptr[ 2] = &X02; Xptr[ 3] = &X03; |
| Xptr[ 4] = &X04; Xptr[ 5] = &X05; Xptr[ 6] = &X06; Xptr[ 7] = &X07; |
| Xptr[ 8] = &X08; Xptr[ 9] = &X09; Xptr[10] = &X10; Xptr[11] = &X11; |
| Xptr[12] = &X12; Xptr[13] = &X13; Xptr[14] = &X14; Xptr[15] = &X15; |
| #endif |
| |
| Skein_assert(blkCnt != 0); /* never call with blkCnt == 0! */ |
| ts[0] = ctx->h.T[0]; |
| ts[1] = ctx->h.T[1]; |
| do { |
| /* this implementation only supports 2**64 input bytes (no carry out here) */ |
| ts[0] += byteCntAdd; /* 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]; |
| |
| Skein_Get64_LSB_First(w,blkPtr,WCNT); /* get input block in little-endian format */ |
| DebugSaveTweak(ctx); |
| Skein_Show_Block(BLK_BITS,&ctx->h,ctx->X,blkPtr,w,ks,ts); |
| |
| X00 = w[ 0] + ks[ 0]; /* do the first full key injection */ |
| 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]; |
| |
| Skein_Show_R_Ptr(BLK_BITS,&ctx->h,SKEIN_RND_KEY_INITIAL,Xptr); |
| |
| #define Round1024(p0,p1,p2,p3,p4,p5,p6,p7,p8,p9,pA,pB,pC,pD,pE,pF,ROT,rNum) \ |
| 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; \ |
| |
| #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) \ |
| Skein_Show_R_Ptr(BLK_BITS,&ctx->h,rn,Xptr); |
| |
| #define I1024(R) \ |
| X00 += ks[((R)+ 1) % 17]; /* inject the key schedule value */ \ |
| 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; \ |
| Skein_Show_R_Ptr(BLK_BITS,&ctx->h,SKEIN_RND_KEY_INJECT,Xptr); |
| #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) \ |
| Skein_Show_R_Ptr(BLK_BITS,&ctx->h,4*(r-1)+rn,Xptr); |
| |
| #define I1024(R) \ |
| X00 += ks[r+(R)+ 0]; /* inject the key schedule value */ \ |
| 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) ; \ |
| ks[r + (R)+16] = ks[r+(R)-1]; /* rotate key schedule */ \ |
| ts[r + (R)+ 2] = ts[r+(R)-1]; \ |
| Skein_Show_R_Ptr(BLK_BITS,&ctx->h,SKEIN_RND_KEY_INJECT,Xptr); |
| |
| for (r=1;r <= 2*RCNT;r+=2*SKEIN_UNROLL_1024) /* loop thru it */ |
| #endif |
| { |
| #define R1024_8_rounds(R) /* do 8 full rounds */ \ |
| 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); |
| |
| R1024_8_rounds( 0); |
| |
| #define R1024_Unroll_R(NN) ((SKEIN_UNROLL_1024 == 0 && SKEIN1024_ROUNDS_TOTAL/8 > (NN)) || (SKEIN_UNROLL_1024 > (NN))) |
| |
| #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 |
| #if (SKEIN_UNROLL_1024 > 14) |
| #error "need more unrolling in Skein_1024_Process_Block" |
| #endif |
| } |
| /* do the final "feedforward" xor, update context chaining vars */ |
| |
| 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]; |
| |
| Skein_Show_Round(BLK_BITS,&ctx->h,SKEIN_RND_FEED_FWD,ctx->X); |
| |
| ts[1] &= ~SKEIN_T1_FLAG_FIRST; |
| blkPtr += SKEIN1024_BLOCK_BYTES; |
| } |
| while (--blkCnt); |
| ctx->h.T[0] = ts[0]; |
| ctx->h.T[1] = ts[1]; |
| } |
| |
| #if defined(SKEIN_CODE_SIZE) || defined(SKEIN_PERF) |
| size_t Skein1024_Process_Block_CodeSize(void) |
| { |
| return ((u8 *) Skein1024_Process_Block_CodeSize) - |
| ((u8 *) Skein1024_Process_Block); |
| } |
| unsigned int Skein1024_Unroll_Cnt(void) |
| { |
| return SKEIN_UNROLL_1024; |
| } |
| #endif |
| #endif |