ddidderr/zstd-rs
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content size is controlled at bufferless level

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so it's active for all entry points

Also : added relevant test (wrong content size) in fuzzer
This commit is contained in:
Yann Collet
2017-04-11 18:34:02 -07:00
parent 6ab02e16b8
commit 20d5e03893
4 changed files with 39 additions and 17 deletions
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lib/compress/zstd_compress.c
+10 -3
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@@ -81,6 +81,7 @@ struct ZSTD_CCtx_s {
size_t workSpaceSize;
size_t blockSize;
U64 frameContentSize;
U64 consumedSrcSize;
XXH64_state_t xxhState;
ZSTD_customMem customMem;
@@ -241,6 +242,7 @@ static size_t ZSTD_continueCCtx(ZSTD_CCtx* cctx, ZSTD_parameters params, U64 fra
U32 const end = (U32)(cctx->nextSrc - cctx->base);
cctx->params = params;
cctx->frameContentSize = frameContentSize;
cctx->consumedSrcSize = 0;
cctx->lowLimit = end;
cctx->dictLimit = end;
cctx->nextToUpdate = end+1;
@@ -313,6 +315,7 @@ static size_t ZSTD_resetCCtx_advanced (ZSTD_CCtx* zc,
zc->params = params;
zc->blockSize = blockSize;
zc->frameContentSize = frameContentSize;
zc->consumedSrcSize = 0;
{ int i; for (i=0; i<ZSTD_REP_NUM; i++) zc->rep[i] = repStartValue[i]; }
if ((params.cParams.strategy == ZSTD_btopt) || (params.cParams.strategy == ZSTD_btopt2)) {
@@ -2493,6 +2496,7 @@ static size_t ZSTD_compressContinue_internal (ZSTD_CCtx* cctx,
ZSTD_compress_generic (cctx, dst, dstCapacity, src, srcSize, lastFrameChunk) :
ZSTD_compressBlock_internal (cctx, dst, dstCapacity, src, srcSize);
if (ZSTD_isError(cSize)) return cSize;
cctx->consumedSrcSize += srcSize;
return cSize + fhSize;
} else
return fhSize;
@@ -2503,7 +2507,7 @@ size_t ZSTD_compressContinue (ZSTD_CCtx* cctx,
void* dst, size_t dstCapacity,
const void* src, size_t srcSize)
{
return ZSTD_compressContinue_internal(cctx, dst, dstCapacity, src, srcSize, 1, 0);
return ZSTD_compressContinue_internal(cctx, dst, dstCapacity, src, srcSize, 1 /* frame mode */, 0 /* last chunk */);
}
@@ -2516,7 +2520,7 @@ size_t ZSTD_compressBlock(ZSTD_CCtx* cctx, void* dst, size_t dstCapacity, const
{
size_t const blockSizeMax = ZSTD_getBlockSizeMax(cctx);
if (srcSize > blockSizeMax) return ERROR(srcSize_wrong);
return ZSTD_compressContinue_internal(cctx, dst, dstCapacity, src, srcSize, 0, 0);
return ZSTD_compressContinue_internal(cctx, dst, dstCapacity, src, srcSize, 0 /* frame mode */, 0 /* last chunk */);
}
/*! ZSTD_loadDictionaryContent() :
@@ -2767,10 +2771,13 @@ size_t ZSTD_compressEnd (ZSTD_CCtx* cctx,
const void* src, size_t srcSize)
{
size_t endResult;
size_t const cSize = ZSTD_compressContinue_internal(cctx, dst, dstCapacity, src, srcSize, 1, 1);
size_t const cSize = ZSTD_compressContinue_internal(cctx, dst, dstCapacity, src, srcSize, 1 /* frame mode */, 1 /* last chunk */);
if (ZSTD_isError(cSize)) return cSize;
endResult = ZSTD_writeEpilogue(cctx, (char*)dst + cSize, dstCapacity-cSize);
if (ZSTD_isError(endResult)) return endResult;
if (cctx->params.fParams.contentSizeFlag) { /* control src size */
if (cctx->frameContentSize != cctx->consumedSrcSize) return ERROR(srcSize_wrong);
}
return cSize + endResult;
}