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nimbus-eth1
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Fix possible IndexError in ecrecover

This commit is contained in:
kdeme 2019-07-19 10:56:47 +02:00 committed by zah
parent 409d771a50
commit 26bc048fea
1 changed files with 2 additions and 2 deletions
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4
nimbus/vm/precompiles.nim
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@ -21,7 +21,7 @@ proc getSignature*(computation: BaseComputation): (array[32, byte], Signature) =
template data: untyped = computation.msg.data template data: untyped = computation.msg.data
var bytes: array[65, byte] var bytes: array[65, byte]
let maxPos = min(data.high, 127) let maxPos = min(data.high, 127)
if maxPos >= 31: if maxPos >= 63:
# extract message hash # extract message hash
result[0][0..31] = data[0..31] result[0][0..31] = data[0..31]
if maxPos >= 127: if maxPos >= 127:
@ -31,7 +31,7 @@ proc getSignature*(computation: BaseComputation): (array[32, byte], Signature) =
elif maxPos >= 64: elif maxPos >= 64:
bytes[0..(maxPos-64)] = data[64..maxPos] bytes[0..(maxPos-64)] = data[64..maxPos]
else: else:
result[0][0..maxPos] = data[0..maxPos] raise newException(ValidationError, "Invalid V in getSignature")
var VOK = true var VOK = true
let v = data[63] let v = data[63]