diff options
Diffstat (limited to 'Modules/_sha3/kcp/KeccakSponge.inc')
| -rw-r--r-- | Modules/_sha3/kcp/KeccakSponge.inc | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/Modules/_sha3/kcp/KeccakSponge.inc b/Modules/_sha3/kcp/KeccakSponge.inc index e10739deaf..cf92e4db4d 100644 --- a/Modules/_sha3/kcp/KeccakSponge.inc +++ b/Modules/_sha3/kcp/KeccakSponge.inc @@ -171,7 +171,7 @@ int SpongeAbsorb(SpongeInstance *instance, const unsigned char *data, size_t dat i = 0; curData = data; while(i < dataByteLen) { - if ((instance->byteIOIndex == 0) && (dataByteLen >= (i + rateInBytes))) { + if ((instance->byteIOIndex == 0) && (dataByteLen-i >= rateInBytes)) { #ifdef SnP_FastLoop_Absorb /* processing full blocks first */ @@ -199,10 +199,10 @@ int SpongeAbsorb(SpongeInstance *instance, const unsigned char *data, size_t dat } else { /* normal lane: using the message queue */ - - partialBlock = (unsigned int)(dataByteLen - i); - if (partialBlock+instance->byteIOIndex > rateInBytes) + if (dataByteLen-i > rateInBytes-instance->byteIOIndex) partialBlock = rateInBytes-instance->byteIOIndex; + else + partialBlock = (unsigned int)(dataByteLen - i); #ifdef KeccakReference displayBytes(1, "Block to be absorbed (part)", curData, partialBlock); #endif @@ -281,7 +281,7 @@ int SpongeSqueeze(SpongeInstance *instance, unsigned char *data, size_t dataByte i = 0; curData = data; while(i < dataByteLen) { - if ((instance->byteIOIndex == rateInBytes) && (dataByteLen >= (i + rateInBytes))) { + if ((instance->byteIOIndex == rateInBytes) && (dataByteLen-i >= rateInBytes)) { for(j=dataByteLen-i; j>=rateInBytes; j-=rateInBytes) { SnP_Permute(instance->state); SnP_ExtractBytes(instance->state, curData, 0, rateInBytes); @@ -299,9 +299,10 @@ int SpongeSqueeze(SpongeInstance *instance, unsigned char *data, size_t dataByte SnP_Permute(instance->state); instance->byteIOIndex = 0; } - partialBlock = (unsigned int)(dataByteLen - i); - if (partialBlock+instance->byteIOIndex > rateInBytes) + if (dataByteLen-i > rateInBytes-instance->byteIOIndex) partialBlock = rateInBytes-instance->byteIOIndex; + else + partialBlock = (unsigned int)(dataByteLen - i); i += partialBlock; SnP_ExtractBytes(instance->state, curData, instance->byteIOIndex, partialBlock); |