not the master key, the schematics to the lock maybe. Assuming no bugs, I don't see how the source code could help in any way, they may as well have downloaded

not the master key, the schematics to the lock maybe. Assuming no bugs, I don't see how the source code could help in any way, they may as well have downloaded the source code for openssl. He also didn't bother to verify whether it was a matter of life or death, he just immediately assumed he was helping break into a file containing the deactivation code for a bomb or something, who knows what the NSA was actually doing.