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Check block header before accepting it.

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Previously, AcceptBlockHeader did not check the header (in particular
PoW).  This made the client accept invalid-PoW-headers from peers in
headers-first sync.
This commit is contained in:
Daniel Kraft 2014-11-20 08:28:19 +01:00
parent b5d1b10929
commit 57425a2425
1 changed files with 5 additions and 0 deletions
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5
src/main.cpp
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@ -2280,6 +2280,8 @@ bool CheckBlock(const CBlock& block, CValidationState& state, bool fCheckPOW, bo
{ {
// These are checks that are independent of context. // These are checks that are independent of context.
// Check that the header is valid (particularly PoW). This is mostly
// redundant with the call in AcceptBlockHeader.
if (!CheckBlockHeader(block, state, fCheckPOW)) if (!CheckBlockHeader(block, state, fCheckPOW))
return false; return false;
@ -2351,6 +2353,9 @@ bool AcceptBlockHeader(const CBlockHeader& block, CValidationState& state, CBloc
return true; return true;
} }
if (!CheckBlockHeader(block, state))
return false;
// Get prev block index // Get prev block index
CBlockIndex* pindexPrev = NULL; CBlockIndex* pindexPrev = NULL;
int nHeight = 0; int nHeight = 0;