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add support to 00 01 sig v

This commit is contained in:
Ricardo Guilherme Schmidt 2019-03-20 22:02:12 -03:00
parent 6bc051e211
commit d14c098a4d
No known key found for this signature in database
GPG Key ID: BFB3F5C8ED618A94
1 changed files with 5 additions and 2 deletions
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7
contracts/common/MessageSigned.sol
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@ -55,6 +55,7 @@ contract MessageSigned {
pure pure
returns (uint8 v, bytes32 r, bytes32 s) returns (uint8 v, bytes32 r, bytes32 s)
{ {
require(_signature.length == 65, "Bad signature length");
// The signature format is a compact form of: // The signature format is a compact form of:
// {bytes32 r}{bytes32 s}{uint8 v} // {bytes32 r}{bytes32 s}{uint8 v}
// Compact means, uint8 is not padded to 32 bytes. // Compact means, uint8 is not padded to 32 bytes.
@ -68,8 +69,10 @@ contract MessageSigned {
// use the second best option, 'and' // use the second best option, 'and'
v := and(mload(add(_signature, 65)), 0xff) v := and(mload(add(_signature, 65)), 0xff)
} }
if (v < 27) {
require(v == 27 || v == 28, "Bad signature"); v += 27;
}
require(v == 27 || v == 28, "Bad signature version");
} }
} }