diff options
Diffstat (limited to 'drivers/staging/skein/skein.c')
| -rw-r--r-- | drivers/staging/skein/skein.c | 352 |
1 files changed, 176 insertions, 176 deletions
diff --git a/drivers/staging/skein/skein.c b/drivers/staging/skein/skein.c index c1565377ff28..e2e5685157a0 100644 --- a/drivers/staging/skein/skein.c +++ b/drivers/staging/skein/skein.c @@ -16,9 +16,9 @@ /*****************************************************************/ /* External function to process blkCnt (nonzero) full block(s) of data. */ -void Skein_256_Process_Block(struct skein_256_ctx *ctx,const u8 *blkPtr,size_t blkCnt,size_t byteCntAdd); -void Skein_512_Process_Block(struct skein_512_ctx *ctx,const u8 *blkPtr,size_t blkCnt,size_t byteCntAdd); -void Skein1024_Process_Block(struct skein1024_ctx *ctx,const u8 *blkPtr,size_t blkCnt,size_t byteCntAdd); +void Skein_256_Process_Block(struct skein_256_ctx *ctx, const u8 *blkPtr, size_t blkCnt, size_t byteCntAdd); +void Skein_512_Process_Block(struct skein_512_ctx *ctx, const u8 *blkPtr, size_t blkCnt, size_t byteCntAdd); +void Skein1024_Process_Block(struct skein1024_ctx *ctx, const u8 *blkPtr, size_t blkCnt, size_t byteCntAdd); /*****************************************************************/ /* 256-bit Skein */ @@ -34,41 +34,41 @@ int Skein_256_Init(struct skein_256_ctx *ctx, size_t hashBitLen) u64 w[SKEIN_256_STATE_WORDS]; } cfg; /* config block */ - Skein_Assert(hashBitLen > 0,SKEIN_BAD_HASHLEN); + Skein_Assert(hashBitLen > 0, SKEIN_BAD_HASHLEN); ctx->h.hashBitLen = hashBitLen; /* output hash bit count */ switch (hashBitLen) { /* use pre-computed values, where available */ case 256: - memcpy(ctx->X,SKEIN_256_IV_256,sizeof(ctx->X)); + memcpy(ctx->X, SKEIN_256_IV_256, sizeof(ctx->X)); break; case 224: - memcpy(ctx->X,SKEIN_256_IV_224,sizeof(ctx->X)); + memcpy(ctx->X, SKEIN_256_IV_224, sizeof(ctx->X)); break; case 160: - memcpy(ctx->X,SKEIN_256_IV_160,sizeof(ctx->X)); + memcpy(ctx->X, SKEIN_256_IV_160, sizeof(ctx->X)); break; case 128: - memcpy(ctx->X,SKEIN_256_IV_128,sizeof(ctx->X)); + memcpy(ctx->X, SKEIN_256_IV_128, sizeof(ctx->X)); break; default: /* here if there is no precomputed IV value available */ /* build/process the config block, type == CONFIG (could be precomputed) */ - Skein_Start_New_Type(ctx,CFG_FINAL); /* set tweaks: T0=0; T1=CFG | FINAL */ + Skein_Start_New_Type(ctx, CFG_FINAL); /* set tweaks: T0=0; T1=CFG | FINAL */ cfg.w[0] = Skein_Swap64(SKEIN_SCHEMA_VER); /* set the schema, version */ cfg.w[1] = Skein_Swap64(hashBitLen); /* hash result length in bits */ cfg.w[2] = Skein_Swap64(SKEIN_CFG_TREE_INFO_SEQUENTIAL); - memset(&cfg.w[3],0,sizeof(cfg) - 3*sizeof(cfg.w[0])); /* zero pad config block */ + memset(&cfg.w[3], 0, sizeof(cfg) - 3*sizeof(cfg.w[0])); /* zero pad config block */ /* compute the initial chaining values from config block */ - memset(ctx->X,0,sizeof(ctx->X)); /* zero the chaining variables */ - Skein_256_Process_Block(ctx,cfg.b,1,SKEIN_CFG_STR_LEN); + memset(ctx->X, 0, sizeof(ctx->X)); /* zero the chaining variables */ + Skein_256_Process_Block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN); break; } /* The chaining vars ctx->X are now initialized for the given hashBitLen. */ /* Set up to process the data message portion of the hash (default) */ - Skein_Start_New_Type(ctx,MSG); /* T0=0, T1= MSG type */ + Skein_Start_New_Type(ctx, MSG); /* T0=0, T1= MSG type */ return SKEIN_SUCCESS; } @@ -76,7 +76,7 @@ int Skein_256_Init(struct skein_256_ctx *ctx, size_t hashBitLen) /*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/ /* init the context for a MAC and/or tree hash operation */ /* [identical to Skein_256_Init() when keyBytes == 0 && treeInfo == SKEIN_CFG_TREE_INFO_SEQUENTIAL] */ -int Skein_256_InitExt(struct skein_256_ctx *ctx,size_t hashBitLen,u64 treeInfo, const u8 *key, size_t keyBytes) +int Skein_256_InitExt(struct skein_256_ctx *ctx, size_t hashBitLen, u64 treeInfo, const u8 *key, size_t keyBytes) { union { @@ -84,42 +84,42 @@ int Skein_256_InitExt(struct skein_256_ctx *ctx,size_t hashBitLen,u64 treeInfo, u64 w[SKEIN_256_STATE_WORDS]; } cfg; /* config block */ - Skein_Assert(hashBitLen > 0,SKEIN_BAD_HASHLEN); - Skein_Assert(keyBytes == 0 || key != NULL,SKEIN_FAIL); + Skein_Assert(hashBitLen > 0, SKEIN_BAD_HASHLEN); + Skein_Assert(keyBytes == 0 || key != NULL, SKEIN_FAIL); /* compute the initial chaining values ctx->X[], based on key */ if (keyBytes == 0) /* is there a key? */ { - memset(ctx->X,0,sizeof(ctx->X)); /* no key: use all zeroes as key for config block */ + memset(ctx->X, 0, sizeof(ctx->X)); /* no key: use all zeroes as key for config block */ } else /* here to pre-process a key */ { Skein_assert(sizeof(cfg.b) >= sizeof(ctx->X)); /* do a mini-Init right here */ - ctx->h.hashBitLen=8*sizeof(ctx->X); /* set output hash bit count = state size */ - Skein_Start_New_Type(ctx,KEY); /* set tweaks: T0 = 0; T1 = KEY type */ - memset(ctx->X,0,sizeof(ctx->X)); /* zero the initial chaining variables */ - Skein_256_Update(ctx,key,keyBytes); /* hash the key */ - Skein_256_Final_Pad(ctx,cfg.b); /* put result into cfg.b[] */ - memcpy(ctx->X,cfg.b,sizeof(cfg.b)); /* copy over into ctx->X[] */ + ctx->h.hashBitLen = 8*sizeof(ctx->X); /* set output hash bit count = state size */ + Skein_Start_New_Type(ctx, KEY); /* set tweaks: T0 = 0; T1 = KEY type */ + memset(ctx->X, 0, sizeof(ctx->X)); /* zero the initial chaining variables */ + Skein_256_Update(ctx, key, keyBytes); /* hash the key */ + Skein_256_Final_Pad(ctx, cfg.b); /* put result into cfg.b[] */ + memcpy(ctx->X, cfg.b, sizeof(cfg.b)); /* copy over into ctx->X[] */ } /* build/process the config block, type == CONFIG (could be precomputed for each key) */ ctx->h.hashBitLen = hashBitLen; /* output hash bit count */ - Skein_Start_New_Type(ctx,CFG_FINAL); + Skein_Start_New_Type(ctx, CFG_FINAL); - memset(&cfg.w,0,sizeof(cfg.w)); /* pre-pad cfg.w[] with zeroes */ + memset(&cfg.w, 0, sizeof(cfg.w)); /* pre-pad cfg.w[] with zeroes */ cfg.w[0] = Skein_Swap64(SKEIN_SCHEMA_VER); cfg.w[1] = Skein_Swap64(hashBitLen); /* hash result length in bits */ cfg.w[2] = Skein_Swap64(treeInfo); /* tree hash config info (or SKEIN_CFG_TREE_INFO_SEQUENTIAL) */ - Skein_Show_Key(256,&ctx->h,key,keyBytes); + Skein_Show_Key(256, &ctx->h, key, keyBytes); /* compute the initial chaining values from config block */ - Skein_256_Process_Block(ctx,cfg.b,1,SKEIN_CFG_STR_LEN); + Skein_256_Process_Block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN); /* The chaining vars ctx->X are now initialized */ /* Set up to process the data message portion of the hash (default) */ - Skein_Start_New_Type(ctx,MSG); + Skein_Start_New_Type(ctx, MSG); return SKEIN_SUCCESS; } @@ -130,7 +130,7 @@ int Skein_256_Update(struct skein_256_ctx *ctx, const u8 *msg, size_t msgByteCnt { size_t n; - Skein_Assert(ctx->h.bCnt <= SKEIN_256_BLOCK_BYTES,SKEIN_FAIL); /* catch uninitialized context */ + Skein_Assert(ctx->h.bCnt <= SKEIN_256_BLOCK_BYTES, SKEIN_FAIL); /* catch uninitialized context */ /* process full blocks, if any */ if (msgByteCnt + ctx->h.bCnt > SKEIN_256_BLOCK_BYTES) @@ -141,20 +141,20 @@ int Skein_256_Update(struct skein_256_ctx *ctx, const u8 *msg, size_t msgByteCnt if (n) { Skein_assert(n < msgByteCnt); /* check on our logic here */ - memcpy(&ctx->b[ctx->h.bCnt],msg,n); + memcpy(&ctx->b[ctx->h.bCnt], msg, n); msgByteCnt -= n; msg += n; ctx->h.bCnt += n; } Skein_assert(ctx->h.bCnt == SKEIN_256_BLOCK_BYTES); - Skein_256_Process_Block(ctx,ctx->b,1,SKEIN_256_BLOCK_BYTES); + Skein_256_Process_Block(ctx, ctx->b, 1, SKEIN_256_BLOCK_BYTES); ctx->h.bCnt = 0; } /* now process any remaining full blocks, directly from input message data */ if (msgByteCnt > SKEIN_256_BLOCK_BYTES) { n = (msgByteCnt-1) / SKEIN_256_BLOCK_BYTES; /* number of full blocks to process */ - Skein_256_Process_Block(ctx,msg,n,SKEIN_256_BLOCK_BYTES); + Skein_256_Process_Block(ctx, msg, n, SKEIN_256_BLOCK_BYTES); msgByteCnt -= n * SKEIN_256_BLOCK_BYTES; msg += n * SKEIN_256_BLOCK_BYTES; } @@ -165,7 +165,7 @@ int Skein_256_Update(struct skein_256_ctx *ctx, const u8 *msg, size_t msgByteCnt if (msgByteCnt) { Skein_assert(msgByteCnt + ctx->h.bCnt <= SKEIN_256_BLOCK_BYTES); - memcpy(&ctx->b[ctx->h.bCnt],msg,msgByteCnt); + memcpy(&ctx->b[ctx->h.bCnt], msg, msgByteCnt); ctx->h.bCnt += msgByteCnt; } @@ -176,33 +176,33 @@ int Skein_256_Update(struct skein_256_ctx *ctx, const u8 *msg, size_t msgByteCnt /* finalize the hash computation and output the result */ int Skein_256_Final(struct skein_256_ctx *ctx, u8 *hashVal) { - size_t i,n,byteCnt; + size_t i, n, byteCnt; u64 X[SKEIN_256_STATE_WORDS]; - Skein_Assert(ctx->h.bCnt <= SKEIN_256_BLOCK_BYTES,SKEIN_FAIL); /* catch uninitialized context */ + Skein_Assert(ctx->h.bCnt <= SKEIN_256_BLOCK_BYTES, SKEIN_FAIL); /* catch uninitialized context */ ctx->h.T[1] |= SKEIN_T1_FLAG_FINAL; /* tag as the final block */ if (ctx->h.bCnt < SKEIN_256_BLOCK_BYTES) /* zero pad b[] if necessary */ - memset(&ctx->b[ctx->h.bCnt],0,SKEIN_256_BLOCK_BYTES - ctx->h.bCnt); + memset(&ctx->b[ctx->h.bCnt], 0, SKEIN_256_BLOCK_BYTES - ctx->h.bCnt); - Skein_256_Process_Block(ctx,ctx->b,1,ctx->h.bCnt); /* process the final block */ + Skein_256_Process_Block(ctx, ctx->b, 1, ctx->h.bCnt); /* process the final block */ /* now output the result */ byteCnt = (ctx->h.hashBitLen + 7) >> 3; /* total number of output bytes */ /* run Threefish in "counter mode" to generate output */ - memset(ctx->b,0,sizeof(ctx->b)); /* zero out b[], so it can hold the counter */ - memcpy(X,ctx->X,sizeof(X)); /* keep a local copy of counter mode "key" */ - for (i=0;i*SKEIN_256_BLOCK_BYTES < byteCnt;i++) + memset(ctx->b, 0, sizeof(ctx->b)); /* zero out b[], so it can hold the counter */ + memcpy(X, ctx->X, sizeof(X)); /* keep a local copy of counter mode "key" */ + for (i = 0; i*SKEIN_256_BLOCK_BYTES < byteCnt; i++) { - ((u64 *)ctx->b)[0]= Skein_Swap64((u64) i); /* build the counter block */ - Skein_Start_New_Type(ctx,OUT_FINAL); - Skein_256_Process_Block(ctx,ctx->b,1,sizeof(u64)); /* run "counter mode" */ + ((u64 *)ctx->b)[0] = Skein_Swap64((u64) i); /* build the counter block */ + Skein_Start_New_Type(ctx, OUT_FINAL); + Skein_256_Process_Block(ctx, ctx->b, 1, sizeof(u64)); /* run "counter mode" */ n = byteCnt - i*SKEIN_256_BLOCK_BYTES; /* number of output bytes left to go */ if (n >= SKEIN_256_BLOCK_BYTES) n = SKEIN_256_BLOCK_BYTES; - Skein_Put64_LSB_First(hashVal+i*SKEIN_256_BLOCK_BYTES,ctx->X,n); /* "output" the ctr mode bytes */ - Skein_Show_Final(256,&ctx->h,n,hashVal+i*SKEIN_256_BLOCK_BYTES); - memcpy(ctx->X,X,sizeof(X)); /* restore the counter mode key for next time */ + Skein_Put64_LSB_First(hashVal+i*SKEIN_256_BLOCK_BYTES, ctx->X, n); /* "output" the ctr mode bytes */ + Skein_Show_Final(256, &ctx->h, n, hashVal+i*SKEIN_256_BLOCK_BYTES); + memcpy(ctx->X, X, sizeof(X)); /* restore the counter mode key for next time */ } return SKEIN_SUCCESS; } @@ -221,42 +221,42 @@ int Skein_512_Init(struct skein_512_ctx *ctx, size_t hashBitLen) u64 w[SKEIN_512_STATE_WORDS]; } cfg; /* config block */ - Skein_Assert(hashBitLen > 0,SKEIN_BAD_HASHLEN); + Skein_Assert(hashBitLen > 0, SKEIN_BAD_HASHLEN); ctx->h.hashBitLen = hashBitLen; /* output hash bit count */ switch (hashBitLen) { /* use pre-computed values, where available */ case 512: - memcpy(ctx->X,SKEIN_512_IV_512,sizeof(ctx->X)); + memcpy(ctx->X, SKEIN_512_IV_512, sizeof(ctx->X)); break; case 384: - memcpy(ctx->X,SKEIN_512_IV_384,sizeof(ctx->X)); + memcpy(ctx->X, SKEIN_512_IV_384, sizeof(ctx->X)); break; case 256: - memcpy(ctx->X,SKEIN_512_IV_256,sizeof(ctx->X)); + memcpy(ctx->X, SKEIN_512_IV_256, sizeof(ctx->X)); break; case 224: - memcpy(ctx->X,SKEIN_512_IV_224,sizeof(ctx->X)); + memcpy(ctx->X, SKEIN_512_IV_224, sizeof(ctx->X)); break; default: /* here if there is no precomputed IV value available */ /* build/process the config block, type == CONFIG (could be precomputed) */ - Skein_Start_New_Type(ctx,CFG_FINAL); /* set tweaks: T0=0; T1=CFG | FINAL */ + Skein_Start_New_Type(ctx, CFG_FINAL); /* set tweaks: T0=0; T1=CFG | FINAL */ cfg.w[0] = Skein_Swap64(SKEIN_SCHEMA_VER); /* set the schema, version */ cfg.w[1] = Skein_Swap64(hashBitLen); /* hash result length in bits */ cfg.w[2] = Skein_Swap64(SKEIN_CFG_TREE_INFO_SEQUENTIAL); - memset(&cfg.w[3],0,sizeof(cfg) - 3*sizeof(cfg.w[0])); /* zero pad config block */ + memset(&cfg.w[3], 0, sizeof(cfg) - 3*sizeof(cfg.w[0])); /* zero pad config block */ /* compute the initial chaining values from config block */ - memset(ctx->X,0,sizeof(ctx->X)); /* zero the chaining variables */ - Skein_512_Process_Block(ctx,cfg.b,1,SKEIN_CFG_STR_LEN); + memset(ctx->X, 0, sizeof(ctx->X)); /* zero the chaining variables */ + Skein_512_Process_Block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN); break; } /* The chaining vars ctx->X are now initialized for the given hashBitLen. */ /* Set up to process the data message portion of the hash (default) */ - Skein_Start_New_Type(ctx,MSG); /* T0=0, T1= MSG type */ + Skein_Start_New_Type(ctx, MSG); /* T0=0, T1= MSG type */ return SKEIN_SUCCESS; } @@ -264,7 +264,7 @@ int Skein_512_Init(struct skein_512_ctx *ctx, size_t hashBitLen) /*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/ /* init the context for a MAC and/or tree hash operation */ /* [identical to Skein_512_Init() when keyBytes == 0 && treeInfo == SKEIN_CFG_TREE_INFO_SEQUENTIAL] */ -int Skein_512_InitExt(struct skein_512_ctx *ctx,size_t hashBitLen,u64 treeInfo, const u8 *key, size_t keyBytes) +int Skein_512_InitExt(struct skein_512_ctx *ctx, size_t hashBitLen, u64 treeInfo, const u8 *key, size_t keyBytes) { union { @@ -272,42 +272,42 @@ int Skein_512_InitExt(struct skein_512_ctx *ctx,size_t hashBitLen,u64 treeInfo, u64 w[SKEIN_512_STATE_WORDS]; } cfg; /* config block */ - Skein_Assert(hashBitLen > 0,SKEIN_BAD_HASHLEN); - Skein_Assert(keyBytes == 0 || key != NULL,SKEIN_FAIL); + Skein_Assert(hashBitLen > 0, SKEIN_BAD_HASHLEN); + Skein_Assert(keyBytes == 0 || key != NULL, SKEIN_FAIL); /* compute the initial chaining values ctx->X[], based on key */ if (keyBytes == 0) /* is there a key? */ { - memset(ctx->X,0,sizeof(ctx->X)); /* no key: use all zeroes as key for config block */ + memset(ctx->X, 0, sizeof(ctx->X)); /* no key: use all zeroes as key for config block */ } else /* here to pre-process a key */ { Skein_assert(sizeof(cfg.b) >= sizeof(ctx->X)); /* do a mini-Init right here */ - ctx->h.hashBitLen=8*sizeof(ctx->X); /* set output hash bit count = state size */ - Skein_Start_New_Type(ctx,KEY); /* set tweaks: T0 = 0; T1 = KEY type */ - memset(ctx->X,0,sizeof(ctx->X)); /* zero the initial chaining variables */ - Skein_512_Update(ctx,key,keyBytes); /* hash the key */ - Skein_512_Final_Pad(ctx,cfg.b); /* put result into cfg.b[] */ - memcpy(ctx->X,cfg.b,sizeof(cfg.b)); /* copy over into ctx->X[] */ + ctx->h.hashBitLen = 8*sizeof(ctx->X); /* set output hash bit count = state size */ + Skein_Start_New_Type(ctx, KEY); /* set tweaks: T0 = 0; T1 = KEY type */ + memset(ctx->X, 0, sizeof(ctx->X)); /* zero the initial chaining variables */ + Skein_512_Update(ctx, key, keyBytes); /* hash the key */ + Skein_512_Final_Pad(ctx, cfg.b); /* put result into cfg.b[] */ + memcpy(ctx->X, cfg.b, sizeof(cfg.b)); /* copy over into ctx->X[] */ } /* build/process the config block, type == CONFIG (could be precomputed for each key) */ ctx->h.hashBitLen = hashBitLen; /* output hash bit count */ - Skein_Start_New_Type(ctx,CFG_FINAL); + Skein_Start_New_Type(ctx, CFG_FINAL); - memset(&cfg.w,0,sizeof(cfg.w)); /* pre-pad cfg.w[] with zeroes */ + memset(&cfg.w, 0, sizeof(cfg.w)); /* pre-pad cfg.w[] with zeroes */ cfg.w[0] = Skein_Swap64(SKEIN_SCHEMA_VER); cfg.w[1] = Skein_Swap64(hashBitLen); /* hash result length in bits */ cfg.w[2] = Skein_Swap64(treeInfo); /* tree hash config info (or SKEIN_CFG_TREE_INFO_SEQUENTIAL) */ - Skein_Show_Key(512,&ctx->h,key,keyBytes); + Skein_Show_Key(512, &ctx->h, key, keyBytes); /* compute the initial chaining values from config block */ - Skein_512_Process_Block(ctx,cfg.b,1,SKEIN_CFG_STR_LEN); + Skein_512_Process_Block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN); /* The chaining vars ctx->X are now initialized */ /* Set up to process the data message portion of the hash (default) */ - Skein_Start_New_Type(ctx,MSG); + Skein_Start_New_Type(ctx, MSG); return SKEIN_SUCCESS; } @@ -318,7 +318,7 @@ int Skein_512_Update(struct skein_512_ctx *ctx, const u8 *msg, size_t msgByteCnt { size_t n; - Skein_Assert(ctx->h.bCnt <= SKEIN_512_BLOCK_BYTES,SKEIN_FAIL); /* catch uninitialized context */ + Skein_Assert(ctx->h.bCnt <= SKEIN_512_BLOCK_BYTES, SKEIN_FAIL); /* catch uninitialized context */ /* process full blocks, if any */ if (msgByteCnt + ctx->h.bCnt > SKEIN_512_BLOCK_BYTES) @@ -329,20 +329,20 @@ int Skein_512_Update(struct skein_512_ctx *ctx, const u8 *msg, size_t msgByteCnt if (n) { Skein_assert(n < msgByteCnt); /* check on our logic here */ - memcpy(&ctx->b[ctx->h.bCnt],msg,n); + memcpy(&ctx->b[ctx->h.bCnt], msg, n); msgByteCnt -= n; msg += n; ctx->h.bCnt += n; } Skein_assert(ctx->h.bCnt == SKEIN_512_BLOCK_BYTES); - Skein_512_Process_Block(ctx,ctx->b,1,SKEIN_512_BLOCK_BYTES); + Skein_512_Process_Block(ctx, ctx->b, 1, SKEIN_512_BLOCK_BYTES); ctx->h.bCnt = 0; } /* now process any remaining full blocks, directly from input message data */ if (msgByteCnt > SKEIN_512_BLOCK_BYTES) { n = (msgByteCnt-1) / SKEIN_512_BLOCK_BYTES; /* number of full blocks to process */ - Skein_512_Process_Block(ctx,msg,n,SKEIN_512_BLOCK_BYTES); + Skein_512_Process_Block(ctx, msg, n, SKEIN_512_BLOCK_BYTES); msgByteCnt -= n * SKEIN_512_BLOCK_BYTES; msg += n * SKEIN_512_BLOCK_BYTES; } @@ -353,7 +353,7 @@ int Skein_512_Update(struct skein_512_ctx *ctx, const u8 *msg, size_t msgByteCnt if (msgByteCnt) { Skein_assert(msgByteCnt + ctx->h.bCnt <= SKEIN_512_BLOCK_BYTES); - memcpy(&ctx->b[ctx->h.bCnt],msg,msgByteCnt); + memcpy(&ctx->b[ctx->h.bCnt], msg, msgByteCnt); ctx->h.bCnt += msgByteCnt; } @@ -364,33 +364,33 @@ int Skein_512_Update(struct skein_512_ctx *ctx, const u8 *msg, size_t msgByteCnt /* finalize the hash computation and output the result */ int Skein_512_Final(struct skein_512_ctx *ctx, u8 *hashVal) { - size_t i,n,byteCnt; + size_t i, n, byteCnt; u64 X[SKEIN_512_STATE_WORDS]; - Skein_Assert(ctx->h.bCnt <= SKEIN_512_BLOCK_BYTES,SKEIN_FAIL); /* catch uninitialized context */ + Skein_Assert(ctx->h.bCnt <= SKEIN_512_BLOCK_BYTES, SKEIN_FAIL); /* catch uninitialized context */ ctx->h.T[1] |= SKEIN_T1_FLAG_FINAL; /* tag as the final block */ if (ctx->h.bCnt < SKEIN_512_BLOCK_BYTES) /* zero pad b[] if necessary */ - memset(&ctx->b[ctx->h.bCnt],0,SKEIN_512_BLOCK_BYTES - ctx->h.bCnt); + memset(&ctx->b[ctx->h.bCnt], 0, SKEIN_512_BLOCK_BYTES - ctx->h.bCnt); - Skein_512_Process_Block(ctx,ctx->b,1,ctx->h.bCnt); /* process the final block */ + Skein_512_Process_Block(ctx, ctx->b, 1, ctx->h.bCnt); /* process the final block */ /* now output the result */ byteCnt = (ctx->h.hashBitLen + 7) >> 3; /* total number of output bytes */ /* run Threefish in "counter mode" to generate output */ - memset(ctx->b,0,sizeof(ctx->b)); /* zero out b[], so it can hold the counter */ - memcpy(X,ctx->X,sizeof(X)); /* keep a local copy of counter mode "key" */ - for (i=0;i*SKEIN_512_BLOCK_BYTES < byteCnt;i++) + memset(ctx->b, 0, sizeof(ctx->b)); /* zero out b[], so it can hold the counter */ + memcpy(X, ctx->X, sizeof(X)); /* keep a local copy of counter mode "key" */ + for (i = 0; i*SKEIN_512_BLOCK_BYTES < byteCnt; i++) { - ((u64 *)ctx->b)[0]= Skein_Swap64((u64) i); /* build the counter block */ - Skein_Start_New_Type(ctx,OUT_FINAL); - Skein_512_Process_Block(ctx,ctx->b,1,sizeof(u64)); /* run "counter mode" */ + ((u64 *)ctx->b)[0] = Skein_Swap64((u64) i); /* build the counter block */ + Skein_Start_New_Type(ctx, OUT_FINAL); + Skein_512_Process_Block(ctx, ctx->b, 1, sizeof(u64)); /* run "counter mode" */ n = byteCnt - i*SKEIN_512_BLOCK_BYTES; /* number of output bytes left to go */ if (n >= SKEIN_512_BLOCK_BYTES) n = SKEIN_512_BLOCK_BYTES; - Skein_Put64_LSB_First(hashVal+i*SKEIN_512_BLOCK_BYTES,ctx->X,n); /* "output" the ctr mode bytes */ - Skein_Show_Final(512,&ctx->h,n,hashVal+i*SKEIN_512_BLOCK_BYTES); - memcpy(ctx->X,X,sizeof(X)); /* restore the counter mode key for next time */ + Skein_Put64_LSB_First(hashVal+i*SKEIN_512_BLOCK_BYTES, ctx->X, n); /* "output" the ctr mode bytes */ + Skein_Show_Final(512, &ctx->h, n, hashVal+i*SKEIN_512_BLOCK_BYTES); + memcpy(ctx->X, X, sizeof(X)); /* restore the counter mode key for next time */ } return SKEIN_SUCCESS; } @@ -409,39 +409,39 @@ int Skein1024_Init(struct skein1024_ctx *ctx, size_t hashBitLen) u64 w[SKEIN1024_STATE_WORDS]; } cfg; /* config block */ - Skein_Assert(hashBitLen > 0,SKEIN_BAD_HASHLEN); + Skein_Assert(hashBitLen > 0, SKEIN_BAD_HASHLEN); ctx->h.hashBitLen = hashBitLen; /* output hash bit count */ switch (hashBitLen) { /* use pre-computed values, where available */ case 512: - memcpy(ctx->X,SKEIN1024_IV_512 ,sizeof(ctx->X)); + memcpy(ctx->X, SKEIN1024_IV_512, sizeof(ctx->X)); break; case 384: - memcpy(ctx->X,SKEIN1024_IV_384 ,sizeof(ctx->X)); + memcpy(ctx->X, SKEIN1024_IV_384, sizeof(ctx->X)); break; case 1024: - memcpy(ctx->X,SKEIN1024_IV_1024,sizeof(ctx->X)); + memcpy(ctx->X, SKEIN1024_IV_1024, sizeof(ctx->X)); break; default: /* here if there is no precomputed IV value available */ /* build/process the config block, type == CONFIG (could be precomputed) */ - Skein_Start_New_Type(ctx,CFG_FINAL); /* set tweaks: T0=0; T1=CFG | FINAL */ + Skein_Start_New_Type(ctx, CFG_FINAL); /* set tweaks: T0=0; T1=CFG | FINAL */ cfg.w[0] = Skein_Swap64(SKEIN_SCHEMA_VER); /* set the schema, version */ cfg.w[1] = Skein_Swap64(hashBitLen); /* hash result length in bits */ cfg.w[2] = Skein_Swap64(SKEIN_CFG_TREE_INFO_SEQUENTIAL); - memset(&cfg.w[3],0,sizeof(cfg) - 3*sizeof(cfg.w[0])); /* zero pad config block */ + memset(&cfg.w[3], 0, sizeof(cfg) - 3*sizeof(cfg.w[0])); /* zero pad config block */ /* compute the initial chaining values from config block */ - memset(ctx->X,0,sizeof(ctx->X)); /* zero the chaining variables */ - Skein1024_Process_Block(ctx,cfg.b,1,SKEIN_CFG_STR_LEN); + memset(ctx->X, 0, sizeof(ctx->X)); /* zero the chaining variables */ + Skein1024_Process_Block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN); break; } /* The chaining vars ctx->X are now initialized for the given hashBitLen. */ /* Set up to process the data message portion of the hash (default) */ - Skein_Start_New_Type(ctx,MSG); /* T0=0, T1= MSG type */ + Skein_Start_New_Type(ctx, MSG); /* T0=0, T1= MSG type */ return SKEIN_SUCCESS; } @@ -449,7 +449,7 @@ int Skein1024_Init(struct skein1024_ctx *ctx, size_t hashBitLen) /*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/ /* init the context for a MAC and/or tree hash operation */ /* [identical to Skein1024_Init() when keyBytes == 0 && treeInfo == SKEIN_CFG_TREE_INFO_SEQUENTIAL] */ -int Skein1024_InitExt(struct skein1024_ctx *ctx,size_t hashBitLen,u64 treeInfo, const u8 *key, size_t keyBytes) +int Skein1024_InitExt(struct skein1024_ctx *ctx, size_t hashBitLen, u64 treeInfo, const u8 *key, size_t keyBytes) { union { @@ -457,42 +457,42 @@ int Skein1024_InitExt(struct skein1024_ctx *ctx,size_t hashBitLen,u64 treeInfo, u64 w[SKEIN1024_STATE_WORDS]; } cfg; /* config block */ - Skein_Assert(hashBitLen > 0,SKEIN_BAD_HASHLEN); - Skein_Assert(keyBytes == 0 || key != NULL,SKEIN_FAIL); + Skein_Assert(hashBitLen > 0, SKEIN_BAD_HASHLEN); + Skein_Assert(keyBytes == 0 || key != NULL, SKEIN_FAIL); /* compute the initial chaining values ctx->X[], based on key */ if (keyBytes == 0) /* is there a key? */ { - memset(ctx->X,0,sizeof(ctx->X)); /* no key: use all zeroes as key for config block */ + memset(ctx->X, 0, sizeof(ctx->X)); /* no key: use all zeroes as key for config block */ } else /* here to pre-process a key */ { Skein_assert(sizeof(cfg.b) >= sizeof(ctx->X)); /* do a mini-Init right here */ - ctx->h.hashBitLen=8*sizeof(ctx->X); /* set output hash bit count = state size */ - Skein_Start_New_Type(ctx,KEY); /* set tweaks: T0 = 0; T1 = KEY type */ - memset(ctx->X,0,sizeof(ctx->X)); /* zero the initial chaining variables */ - Skein1024_Update(ctx,key,keyBytes); /* hash the key */ - Skein1024_Final_Pad(ctx,cfg.b); /* put result into cfg.b[] */ - memcpy(ctx->X,cfg.b,sizeof(cfg.b)); /* copy over into ctx->X[] */ + ctx->h.hashBitLen = 8*sizeof(ctx->X); /* set output hash bit count = state size */ + Skein_Start_New_Type(ctx, KEY); /* set tweaks: T0 = 0; T1 = KEY type */ + memset(ctx->X, 0, sizeof(ctx->X)); /* zero the initial chaining variables */ + Skein1024_Update(ctx, key, keyBytes); /* hash the key */ + Skein1024_Final_Pad(ctx, cfg.b); /* put result into cfg.b[] */ + memcpy(ctx->X, cfg.b, sizeof(cfg.b)); /* copy over into ctx->X[] */ } /* build/process the config block, type == CONFIG (could be precomputed for each key) */ ctx->h.hashBitLen = hashBitLen; /* output hash bit count */ - Skein_Start_New_Type(ctx,CFG_FINAL); + Skein_Start_New_Type(ctx, CFG_FINAL); - memset(&cfg.w,0,sizeof(cfg.w)); /* pre-pad cfg.w[] with zeroes */ + memset(&cfg.w, 0, sizeof(cfg.w)); /* pre-pad cfg.w[] with zeroes */ cfg.w[0] = Skein_Swap64(SKEIN_SCHEMA_VER); cfg.w[1] = Skein_Swap64(hashBitLen); /* hash result length in bits */ cfg.w[2] = Skein_Swap64(treeInfo); /* tree hash config info (or SKEIN_CFG_TREE_INFO_SEQUENTIAL) */ - Skein_Show_Key(1024,&ctx->h,key,keyBytes); + Skein_Show_Key(1024, &ctx->h, key, keyBytes); /* compute the initial chaining values from config block */ - Skein1024_Process_Block(ctx,cfg.b,1,SKEIN_CFG_STR_LEN); + Skein1024_Process_Block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN); /* The chaining vars ctx->X are now initialized */ /* Set up to process the data message portion of the hash (default) */ - Skein_Start_New_Type(ctx,MSG); + Skein_Start_New_Type(ctx, MSG); return SKEIN_SUCCESS; } @@ -503,7 +503,7 @@ int Skein1024_Update(struct skein1024_ctx *ctx, const u8 *msg, size_t msgByteCnt { size_t n; - Skein_Assert(ctx->h.bCnt <= SKEIN1024_BLOCK_BYTES,SKEIN_FAIL); /* catch uninitialized context */ + Skein_Assert(ctx->h.bCnt <= SKEIN1024_BLOCK_BYTES, SKEIN_FAIL); /* catch uninitialized context */ /* process full blocks, if any */ if (msgByteCnt + ctx->h.bCnt > SKEIN1024_BLOCK_BYTES) @@ -514,20 +514,20 @@ int Skein1024_Update(struct skein1024_ctx *ctx, const u8 *msg, size_t msgByteCnt if (n) { Skein_assert(n < msgByteCnt); /* check on our logic here */ - memcpy(&ctx->b[ctx->h.bCnt],msg,n); + memcpy(&ctx->b[ctx->h.bCnt], msg, n); msgByteCnt -= n; msg += n; ctx->h.bCnt += n; } Skein_assert(ctx->h.bCnt == SKEIN1024_BLOCK_BYTES); - Skein1024_Process_Block(ctx,ctx->b,1,SKEIN1024_BLOCK_BYTES); + Skein1024_Process_Block(ctx, ctx->b, 1, SKEIN1024_BLOCK_BYTES); ctx->h.bCnt = 0; } /* now process any remaining full blocks, directly from input message data */ if (msgByteCnt > SKEIN1024_BLOCK_BYTES) { n = (msgByteCnt-1) / SKEIN1024_BLOCK_BYTES; /* number of full blocks to process */ - Skein1024_Process_Block(ctx,msg,n,SKEIN1024_BLOCK_BYTES); + Skein1024_Process_Block(ctx, msg, n, SKEIN1024_BLOCK_BYTES); msgByteCnt -= n * SKEIN1024_BLOCK_BYTES; msg += n * SKEIN1024_BLOCK_BYTES; } @@ -538,7 +538,7 @@ int Skein1024_Update(struct skein1024_ctx *ctx, const u8 *msg, size_t msgByteCnt if (msgByteCnt) { Skein_assert(msgByteCnt + ctx->h.bCnt <= SKEIN1024_BLOCK_BYTES); - memcpy(&ctx->b[ctx->h.bCnt],msg,msgByteCnt); + memcpy(&ctx->b[ctx->h.bCnt], msg, msgByteCnt); ctx->h.bCnt += msgByteCnt; } @@ -549,33 +549,33 @@ int Skein1024_Update(struct skein1024_ctx *ctx, const u8 *msg, size_t msgByteCnt /* finalize the hash computation and output the result */ int Skein1024_Final(struct skein1024_ctx *ctx, u8 *hashVal) { - size_t i,n,byteCnt; + size_t i, n, byteCnt; u64 X[SKEIN1024_STATE_WORDS]; - Skein_Assert(ctx->h.bCnt <= SKEIN1024_BLOCK_BYTES,SKEIN_FAIL); /* catch uninitialized context */ + Skein_Assert(ctx->h.bCnt <= SKEIN1024_BLOCK_BYTES, SKEIN_FAIL); /* catch uninitialized context */ ctx->h.T[1] |= SKEIN_T1_FLAG_FINAL; /* tag as the final block */ if (ctx->h.bCnt < SKEIN1024_BLOCK_BYTES) /* zero pad b[] if necessary */ - memset(&ctx->b[ctx->h.bCnt],0,SKEIN1024_BLOCK_BYTES - ctx->h.bCnt); + memset(&ctx->b[ctx->h.bCnt], 0, SKEIN1024_BLOCK_BYTES - ctx->h.bCnt); - Skein1024_Process_Block(ctx,ctx->b,1,ctx->h.bCnt); /* process the final block */ + Skein1024_Process_Block(ctx, ctx->b, 1, ctx->h.bCnt); /* process the final block */ /* now output the result */ byteCnt = (ctx->h.hashBitLen + 7) >> 3; /* total number of output bytes */ /* run Threefish in "counter mode" to generate output */ - memset(ctx->b,0,sizeof(ctx->b)); /* zero out b[], so it can hold the counter */ - memcpy(X,ctx->X,sizeof(X)); /* keep a local copy of counter mode "key" */ - for (i=0;i*SKEIN1024_BLOCK_BYTES < byteCnt;i++) + memset(ctx->b, 0, sizeof(ctx->b)); /* zero out b[], so it can hold the counter */ + memcpy(X, ctx->X, sizeof(X)); /* keep a local copy of counter mode "key" */ + for (i = 0; i*SKEIN1024_BLOCK_BYTES < byteCnt; i++) { - ((u64 *)ctx->b)[0]= Skein_Swap64((u64) i); /* build the counter block */ - Skein_Start_New_Type(ctx,OUT_FINAL); - Skein1024_Process_Block(ctx,ctx->b,1,sizeof(u64)); /* run "counter mode" */ + ((u64 *)ctx->b)[0] = Skein_Swap64((u64) i); /* build the counter block */ + Skein_Start_New_Type(ctx, OUT_FINAL); + Skein1024_Process_Block(ctx, ctx->b, 1, sizeof(u64)); /* run "counter mode" */ n = byteCnt - i*SKEIN1024_BLOCK_BYTES; /* number of output bytes left to go */ if (n >= SKEIN1024_BLOCK_BYTES) n = SKEIN1024_BLOCK_BYTES; - Skein_Put64_LSB_First(hashVal+i*SKEIN1024_BLOCK_BYTES,ctx->X,n); /* "output" the ctr mode bytes */ - Skein_Show_Final(1024,&ctx->h,n,hashVal+i*SKEIN1024_BLOCK_BYTES); - memcpy(ctx->X,X,sizeof(X)); /* restore the counter mode key for next time */ + Skein_Put64_LSB_First(hashVal+i*SKEIN1024_BLOCK_BYTES, ctx->X, n); /* "output" the ctr mode bytes */ + Skein_Show_Final(1024, &ctx->h, n, hashVal+i*SKEIN1024_BLOCK_BYTES); + memcpy(ctx->X, X, sizeof(X)); /* restore the counter mode key for next time */ } return SKEIN_SUCCESS; } @@ -587,14 +587,14 @@ int Skein1024_Final(struct skein1024_ctx *ctx, u8 *hashVal) /* finalize the hash computation and output the block, no OUTPUT stage */ int Skein_256_Final_Pad(struct skein_256_ctx *ctx, u8 *hashVal) { - Skein_Assert(ctx->h.bCnt <= SKEIN_256_BLOCK_BYTES,SKEIN_FAIL); /* catch uninitialized context */ + Skein_Assert(ctx->h.bCnt <= SKEIN_256_BLOCK_BYTES, SKEIN_FAIL); /* catch uninitialized context */ ctx->h.T[1] |= SKEIN_T1_FLAG_FINAL; /* tag as the final block */ if (ctx->h.bCnt < SKEIN_256_BLOCK_BYTES) /* zero pad b[] if necessary */ - memset(&ctx->b[ctx->h.bCnt],0,SKEIN_256_BLOCK_BYTES - ctx->h.bCnt); - Skein_256_Process_Block(ctx,ctx->b,1,ctx->h.bCnt); /* process the final block */ + memset(&ctx->b[ctx->h.bCnt], 0, SKEIN_256_BLOCK_BYTES - ctx->h.bCnt); + Skein_256_Process_Block(ctx, ctx->b, 1, ctx->h.bCnt); /* process the final block */ - Skein_Put64_LSB_First(hashVal,ctx->X,SKEIN_256_BLOCK_BYTES); /* "output" the state bytes */ + Skein_Put64_LSB_First(hashVal, ctx->X, SKEIN_256_BLOCK_BYTES); /* "output" the state bytes */ return SKEIN_SUCCESS; } @@ -603,14 +603,14 @@ int Skein_256_Final_Pad(struct skein_256_ctx *ctx, u8 *hashVal) /* finalize the hash computation and output the block, no OUTPUT stage */ int Skein_512_Final_Pad(struct skein_512_ctx *ctx, u8 *hashVal) { - Skein_Assert(ctx->h.bCnt <= SKEIN_512_BLOCK_BYTES,SKEIN_FAIL); /* catch uninitialized context */ + Skein_Assert(ctx->h.bCnt <= SKEIN_512_BLOCK_BYTES, SKEIN_FAIL); /* catch uninitialized context */ ctx->h.T[1] |= SKEIN_T1_FLAG_FINAL; /* tag as the final block */ if (ctx->h.bCnt < SKEIN_512_BLOCK_BYTES) /* zero pad b[] if necessary */ - memset(&ctx->b[ctx->h.bCnt],0,SKEIN_512_BLOCK_BYTES - ctx->h.bCnt); - Skein_512_Process_Block(ctx,ctx->b,1,ctx->h.bCnt); /* process the final block */ + memset(&ctx->b[ctx->h.bCnt], 0, SKEIN_512_BLOCK_BYTES - ctx->h.bCnt); + Skein_512_Process_Block(ctx, ctx->b, 1, ctx->h.bCnt); /* process the final block */ - Skein_Put64_LSB_First(hashVal,ctx->X,SKEIN_512_BLOCK_BYTES); /* "output" the state bytes */ + Skein_Put64_LSB_First(hashVal, ctx->X, SKEIN_512_BLOCK_BYTES); /* "output" the state bytes */ return SKEIN_SUCCESS; } @@ -619,14 +619,14 @@ int Skein_512_Final_Pad(struct skein_512_ctx *ctx, u8 *hashVal) /* finalize the hash computation and output the block, no OUTPUT stage */ int Skein1024_Final_Pad(struct skein1024_ctx *ctx, u8 *hashVal) { - Skein_Assert(ctx->h.bCnt <= SKEIN1024_BLOCK_BYTES,SKEIN_FAIL); /* catch uninitialized context */ + Skein_Assert(ctx->h.bCnt <= SKEIN1024_BLOCK_BYTES, SKEIN_FAIL); /* catch uninitialized context */ ctx->h.T[1] |= SKEIN_T1_FLAG_FINAL; /* tag as the final block */ if (ctx->h.bCnt < SKEIN1024_BLOCK_BYTES) /* zero pad b[] if necessary */ - memset(&ctx->b[ctx->h.bCnt],0,SKEIN1024_BLOCK_BYTES - ctx->h.bCnt); - Skein1024_Process_Block(ctx,ctx->b,1,ctx->h.bCnt); /* process the final block */ + memset(&ctx->b[ctx->h.bCnt], 0, SKEIN1024_BLOCK_BYTES - ctx->h.bCnt); + Skein1024_Process_Block(ctx, ctx->b, 1, ctx->h.bCnt); /* process the final block */ - Skein_Put64_LSB_First(hashVal,ctx->X,SKEIN1024_BLOCK_BYTES); /* "output" the state bytes */ + Skein_Put64_LSB_First(hashVal, ctx->X, SKEIN1024_BLOCK_BYTES); /* "output" the state bytes */ return SKEIN_SUCCESS; } @@ -636,27 +636,27 @@ int Skein1024_Final_Pad(struct skein1024_ctx *ctx, u8 *hashVal) /* just do the OUTPUT stage */ int Skein_256_Output(struct skein_256_ctx *ctx, u8 *hashVal) { - size_t i,n,byteCnt; + size_t i, n, byteCnt; u64 X[SKEIN_256_STATE_WORDS]; - Skein_Assert(ctx->h.bCnt <= SKEIN_256_BLOCK_BYTES,SKEIN_FAIL); /* catch uninitialized context */ + Skein_Assert(ctx->h.bCnt <= SKEIN_256_BLOCK_BYTES, SKEIN_FAIL); /* catch uninitialized context */ /* now output the result */ byteCnt = (ctx->h.hashBitLen + 7) >> 3; /* total number of output bytes */ /* run Threefish in "counter mode" to generate output */ - memset(ctx->b,0,sizeof(ctx->b)); /* zero out b[], so it can hold the counter */ - memcpy(X,ctx->X,sizeof(X)); /* keep a local copy of counter mode "key" */ - for (i=0;i*SKEIN_256_BLOCK_BYTES < byteCnt;i++) + memset(ctx->b, 0, sizeof(ctx->b)); /* zero out b[], so it can hold the counter */ + memcpy(X, ctx->X, sizeof(X)); /* keep a local copy of counter mode "key" */ + for (i = 0; i*SKEIN_256_BLOCK_BYTES < byteCnt; i++) { - ((u64 *)ctx->b)[0]= Skein_Swap64((u64) i); /* build the counter block */ - Skein_Start_New_Type(ctx,OUT_FINAL); - Skein_256_Process_Block(ctx,ctx->b,1,sizeof(u64)); /* run "counter mode" */ + ((u64 *)ctx->b)[0] = Skein_Swap64((u64) i); /* build the counter block */ + Skein_Start_New_Type(ctx, OUT_FINAL); + Skein_256_Process_Block(ctx, ctx->b, 1, sizeof(u64)); /* run "counter mode" */ n = byteCnt - i*SKEIN_256_BLOCK_BYTES; /* number of output bytes left to go */ if (n >= SKEIN_256_BLOCK_BYTES) n = SKEIN_256_BLOCK_BYTES; - Skein_Put64_LSB_First(hashVal+i*SKEIN_256_BLOCK_BYTES,ctx->X,n); /* "output" the ctr mode bytes */ - Skein_Show_Final(256,&ctx->h,n,hashVal+i*SKEIN_256_BLOCK_BYTES); - memcpy(ctx->X,X,sizeof(X)); /* restore the counter mode key for next time */ + Skein_Put64_LSB_First(hashVal+i*SKEIN_256_BLOCK_BYTES, ctx->X, n); /* "output" the ctr mode bytes */ + Skein_Show_Final(256, &ctx->h, n, hashVal+i*SKEIN_256_BLOCK_BYTES); + memcpy(ctx->X, X, sizeof(X)); /* restore the counter mode key for next time */ } return SKEIN_SUCCESS; } @@ -665,27 +665,27 @@ int Skein_256_Output(struct skein_256_ctx *ctx, u8 *hashVal) /* just do the OUTPUT stage */ int Skein_512_Output(struct skein_512_ctx *ctx, u8 *hashVal) { - size_t i,n,byteCnt; + size_t i, n, byteCnt; u64 X[SKEIN_512_STATE_WORDS]; - Skein_Assert(ctx->h.bCnt <= SKEIN_512_BLOCK_BYTES,SKEIN_FAIL); /* catch uninitialized context */ + Skein_Assert(ctx->h.bCnt <= SKEIN_512_BLOCK_BYTES, SKEIN_FAIL); /* catch uninitialized context */ /* now output the result */ byteCnt = (ctx->h.hashBitLen + 7) >> 3; /* total number of output bytes */ /* run Threefish in "counter mode" to generate output */ - memset(ctx->b,0,sizeof(ctx->b)); /* zero out b[], so it can hold the counter */ - memcpy(X,ctx->X,sizeof(X)); /* keep a local copy of counter mode "key" */ - for (i=0;i*SKEIN_512_BLOCK_BYTES < byteCnt;i++) + memset(ctx->b, 0, sizeof(ctx->b)); /* zero out b[], so it can hold the counter */ + memcpy(X, ctx->X, sizeof(X)); /* keep a local copy of counter mode "key" */ + for (i = 0; i*SKEIN_512_BLOCK_BYTES < byteCnt; i++) { - ((u64 *)ctx->b)[0]= Skein_Swap64((u64) i); /* build the counter block */ - Skein_Start_New_Type(ctx,OUT_FINAL); - Skein_512_Process_Block(ctx,ctx->b,1,sizeof(u64)); /* run "counter mode" */ + ((u64 *)ctx->b)[0] = Skein_Swap64((u64) i); /* build the counter block */ + Skein_Start_New_Type(ctx, OUT_FINAL); + Skein_512_Process_Block(ctx, ctx->b, 1, sizeof(u64)); /* run "counter mode" */ n = byteCnt - i*SKEIN_512_BLOCK_BYTES; /* number of output bytes left to go */ if (n >= SKEIN_512_BLOCK_BYTES) n = SKEIN_512_BLOCK_BYTES; - Skein_Put64_LSB_First(hashVal+i*SKEIN_512_BLOCK_BYTES,ctx->X,n); /* "output" the ctr mode bytes */ - Skein_Show_Final(256,&ctx->h,n,hashVal+i*SKEIN_512_BLOCK_BYTES); - memcpy(ctx->X,X,sizeof(X)); /* restore the counter mode key for next time */ + Skein_Put64_LSB_First(hashVal+i*SKEIN_512_BLOCK_BYTES, ctx->X, n); /* "output" the ctr mode bytes */ + Skein_Show_Final(256, &ctx->h, n, hashVal+i*SKEIN_512_BLOCK_BYTES); + memcpy(ctx->X, X, sizeof(X)); /* restore the counter mode key for next time */ } return SKEIN_SUCCESS; } @@ -694,27 +694,27 @@ int Skein_512_Output(struct skein_512_ctx *ctx, u8 *hashVal) /* just do the OUTPUT stage */ int Skein1024_Output(struct skein1024_ctx *ctx, u8 *hashVal) { - size_t i,n,byteCnt; + size_t i, n, byteCnt; u64 X[SKEIN1024_STATE_WORDS]; - Skein_Assert(ctx->h.bCnt <= SKEIN1024_BLOCK_BYTES,SKEIN_FAIL); /* catch uninitialized context */ + Skein_Assert(ctx->h.bCnt <= SKEIN1024_BLOCK_BYTES, SKEIN_FAIL); /* catch uninitialized context */ /* now output the result */ byteCnt = (ctx->h.hashBitLen + 7) >> 3; /* total number of output bytes */ /* run Threefish in "counter mode" to generate output */ - memset(ctx->b,0,sizeof(ctx->b)); /* zero out b[], so it can hold the counter */ - memcpy(X,ctx->X,sizeof(X)); /* keep a local copy of counter mode "key" */ - for (i=0;i*SKEIN1024_BLOCK_BYTES < byteCnt;i++) + memset(ctx->b, 0, sizeof(ctx->b)); /* zero out b[], so it can hold the counter */ + memcpy(X, ctx->X, sizeof(X)); /* keep a local copy of counter mode "key" */ + for (i = 0; i*SKEIN1024_BLOCK_BYTES < byteCnt; i++) { - ((u64 *)ctx->b)[0]= Skein_Swap64((u64) i); /* build the counter block */ - Skein_Start_New_Type(ctx,OUT_FINAL); - Skein1024_Process_Block(ctx,ctx->b,1,sizeof(u64)); /* run "counter mode" */ + ((u64 *)ctx->b)[0] = Skein_Swap64((u64) i); /* build the counter block */ + Skein_Start_New_Type(ctx, OUT_FINAL); + Skein1024_Process_Block(ctx, ctx->b, 1, sizeof(u64)); /* run "counter mode" */ n = byteCnt - i*SKEIN1024_BLOCK_BYTES; /* number of output bytes left to go */ if (n >= SKEIN1024_BLOCK_BYTES) n = SKEIN1024_BLOCK_BYTES; - Skein_Put64_LSB_First(hashVal+i*SKEIN1024_BLOCK_BYTES,ctx->X,n); /* "output" the ctr mode bytes */ - Skein_Show_Final(256,&ctx->h,n,hashVal+i*SKEIN1024_BLOCK_BYTES); - memcpy(ctx->X,X,sizeof(X)); /* restore the counter mode key for next time */ + Skein_Put64_LSB_First(hashVal+i*SKEIN1024_BLOCK_BYTES, ctx->X, n); /* "output" the ctr mode bytes */ + Skein_Show_Final(256, &ctx->h, n, hashVal+i*SKEIN1024_BLOCK_BYTES); + memcpy(ctx->X, X, sizeof(X)); /* restore the counter mode key for next time */ } return SKEIN_SUCCESS; } |