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Consistently use ParseHashV to validate hash inputs in rpc

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ParseHashV validates the length and encoding of the string and throws
an informative RPC error on failure, which is as good or better than
these alternative calls.

Note I switched ParseHashV to check string length first, because
IsHex tests that the length is even, and an error like:
"must be of length 64 (not 63, for X)" is much more informative than
"must be hexadecimal string (not X)"
This commit is contained in:
Ben Woosley
2018-06-08 11:16:07 -07:00
parent 56f69360dc
commit 5eb20f81d9
14 changed files with 58 additions and 59 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/rpc/blockchain.cpp
+9 -16
View File
@@ -252,7 +252,7 @@ static UniValue waitforblock(const JSONRPCRequest& request)
);
int timeout = 0;
uint256 hash = uint256S(request.params[0].get_str());
uint256 hash(ParseHashV(request.params[0], "blockhash"));
if (!request.params[1].isNull())
timeout = request.params[1].get_int();
@@ -706,8 +706,7 @@ static UniValue getblockheader(const JSONRPCRequest& request)
LOCK(cs_main);
std::string strHash = request.params[0].get_str();
uint256 hash(uint256S(strHash));
uint256 hash(ParseHashV(request.params[0], "hash"));
bool fVerbose = true;
if (!request.params[1].isNull())
@@ -800,8 +799,7 @@ static UniValue getblock(const JSONRPCRequest& request)
LOCK(cs_main);
std::string strHash = request.params[0].get_str();
uint256 hash(uint256S(strHash));
uint256 hash(ParseHashV(request.params[0], "blockhash"));
int verbosity = 1;
if (!request.params[1].isNull()) {
@@ -1033,8 +1031,7 @@ UniValue gettxout(const JSONRPCRequest& request)
UniValue ret(UniValue::VOBJ);
std::string strHash = request.params[0].get_str();
uint256 hash(uint256S(strHash));
uint256 hash(ParseHashV(request.params[0], "txid"));
int n = request.params[1].get_int();
COutPoint out(hash, n);
bool fMempool = true;
@@ -1442,8 +1439,7 @@ static UniValue preciousblock(const JSONRPCRequest& request)
+ HelpExampleRpc("preciousblock", "\"blockhash\"")
);
std::string strHash = request.params[0].get_str();
uint256 hash(uint256S(strHash));
uint256 hash(ParseHashV(request.params[0], "blockhash"));
CBlockIndex* pblockindex;
{
@@ -1478,8 +1474,7 @@ static UniValue invalidateblock(const JSONRPCRequest& request)
+ HelpExampleRpc("invalidateblock", "\"blockhash\"")
);
std::string strHash = request.params[0].get_str();
uint256 hash(uint256S(strHash));
uint256 hash(ParseHashV(request.params[0], "blockhash"));
CValidationState state;
{
@@ -1518,8 +1513,7 @@ static UniValue reconsiderblock(const JSONRPCRequest& request)
+ HelpExampleRpc("reconsiderblock", "\"blockhash\"")
);
std::string strHash = request.params[0].get_str();
uint256 hash(uint256S(strHash));
uint256 hash(ParseHashV(request.params[0], "blockhash"));
{
LOCK(cs_main);
@@ -1572,7 +1566,7 @@ static UniValue getchaintxstats(const JSONRPCRequest& request)
LOCK(cs_main);
pindex = chainActive.Tip();
} else {
uint256 hash = uint256S(request.params[1].get_str());
uint256 hash(ParseHashV(request.params[1], "blockhash"));
LOCK(cs_main);
pindex = LookupBlockIndex(hash);
if (!pindex) {
@@ -1711,8 +1705,7 @@ static UniValue getblockstats(const JSONRPCRequest& request)
pindex = chainActive[height];
} else {
const std::string strHash = request.params[0].get_str();
const uint256 hash(uint256S(strHash));
const uint256 hash(ParseHashV(request.params[0], "hash_or_height"));
pindex = LookupBlockIndex(hash);
if (!pindex) {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found");