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Fix silent uint64 negative conversion https://github.com/status-im/nim-beacon-chain/issues/1671 https://github.com/status-im/nim-beacon-chain/pull/1819 (#85)

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Mamy Ratsimbazafy 2020-10-07 12:09:36 +02:00 committed by GitHub
parent dff46c991d
commit 99455437ba
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json_rpc/jsonmarshal.nim
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@ -86,7 +86,13 @@ proc fromJson*(n: JsonNode, argName: string, result: var int64) =
proc fromJson*(n: JsonNode, argName: string, result: var uint64) =
n.kind.expect(JInt, argName)
result = n.getInt().uint64
let asInt = n.getInt()
# signed -> unsigned conversions are unchecked
# https://github.com/nim-lang/RFCs/issues/175
if asInt < 0:
raise newException(
ValueError, "JSON-RPC input is an unexpected negative value")
result = uint64(asInt)
proc fromJson*(n: JsonNode, argName: string, result: var ref int64) =
n.kind.expect(JInt, argName)