ASN.1 tag lengths > 1-byte are not supported (#8)

base · Jan 11, 2025 · cbb9982 · cbb9982
1 parent 0b52df2
commit cbb9982
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/Asn1Decode.sol b/src/Asn1Decode.sol
@@ -209,6 +209,7 @@ library Asn1Decode {
     }
 
     function readNodeLength(bytes memory der, uint256 ix) private pure returns (Asn1Ptr) {
+        require(der[ix] & 0x1f != 0x1f, "ASN.1 tags longer than 1-byte are not supported");
         uint256 length;
         uint80 ixFirstContentByte;
         if ((der[ix + 1] & 0x80) == 0) {