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Fix incorrect PoW buffer length usage

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catbref
2020-06-08 09:01:55 +01:00
parent 758a42db36
commit 847093edac
2 changed files with 3 additions and 81 deletions
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5
src/main/wasm/memory-pow/memory-pow.c
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@@ -4,7 +4,6 @@
typedef unsigned long long uint64_t;
#endif
#define WORKBUFFER_LENGTH (longBufferLength / 8)
#define INTEGER_MAX_VALUE 0x7fffffffULL
uint64_t xoshiro256p(uint64_t state[]) {
@@ -71,13 +70,13 @@ uint32_t compute2(uint8_t *hash, uint64_t *workBuffer, uint32_t workBufferLength
state[3] = longHash[3] ^ seed;
// Fill work buffer with random
for (uint32_t i = 0; i < WORKBUFFER_LENGTH; ++i)
for (uint32_t i = 0; i < longBufferLength; ++i)
workBuffer[i] = xoshiro256p(state);
// Random bounce through whole buffer
result = workBuffer[0];
for (uint32_t i = 0; i < 1024; ++i) {
uint32_t index = (uint32_t) (xoshiro256p(state) & INTEGER_MAX_VALUE) % WORKBUFFER_LENGTH;
uint32_t index = (uint32_t) (xoshiro256p(state) & INTEGER_MAX_VALUE) % longBufferLength;
result ^= workBuffer[index];
}