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author | Greg Hysen <greg.hysen@gmail.com> | 2018-08-30 02:39:52 +0800 |
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committer | Greg Hysen <greg.hysen@gmail.com> | 2018-08-30 02:39:52 +0800 |
commit | 1c3b2b7141138f8da82197dfbdbdbfd76e7780b7 (patch) | |
tree | 729805d651424b1fc9ff8c8f7effc01d58efdcdf /packages/contracts/src/2.0.0/protocol/AssetProxyOwner/AssetProxyOwner.sol | |
parent | f44644ad9029148c43f69d666356ed9fb18de4e2 (diff) | |
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Updated readBytes4 to match spec + added unit tests. These are 3.5/3.6 from audit
Diffstat (limited to 'packages/contracts/src/2.0.0/protocol/AssetProxyOwner/AssetProxyOwner.sol')
-rw-r--r-- | packages/contracts/src/2.0.0/protocol/AssetProxyOwner/AssetProxyOwner.sol | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/packages/contracts/src/2.0.0/protocol/AssetProxyOwner/AssetProxyOwner.sol b/packages/contracts/src/2.0.0/protocol/AssetProxyOwner/AssetProxyOwner.sol index 8b7333646..e661f2427 100644 --- a/packages/contracts/src/2.0.0/protocol/AssetProxyOwner/AssetProxyOwner.sol +++ b/packages/contracts/src/2.0.0/protocol/AssetProxyOwner/AssetProxyOwner.sol @@ -105,11 +105,20 @@ contract AssetProxyOwner is uint256 index ) internal + pure returns (bytes4 result) { - require(b.length >= index + 4); + require( + b.length >= index + 4, + "GREATER_OR_EQUAL_TO_4_LENGTH_REQUIRED" + ); + + // Arrays are prefixed by a 32 byte length field + index += 32; + + // Read the bytes4 from array memory assembly { - result := mload(add(b, 32)) + result := mload(add(b, index)) // Solidity does not require us to clean the trailing bytes. // We do it anyway result := and(result, 0xFFFFFFFF00000000000000000000000000000000000000000000000000000000) |