Hi Christopher + Eric, thanks for your feedback. You are right, i really underestimated the risk of such attacks.
I will lock the key-holding memory in the next release. cheers, Matthias Am Montag, 15. Oktober 2018 23:13:32 UTC+2 schrieb Christopher Nielsen: > > On Mon, Oct 15, 2018 at 1:28 PM Matthias Schmidt > <matthias...@gmail.com <javascript:>> wrote: > > > > Hi Eric, > > > > thanks *a lot* for your valuable feedback! I really appreciate it. See > comments inline: > > > > Am Montag, 15. Oktober 2018 12:09:32 UTC+2 schrieb EricR: > >> > >> Since you're looking for opinions on the security concept, two > questions spring immediately to my mind: > >> > >> 1. Does the daemon keep the sensitive data in locked memory that cannot > be paged out? If so, how cross-platform is this? > > > > > > No it doesn't. As of now i consider the root-user a good guy ;-) > > He's the only one who could access the pagefiles anyway. > > > > So is this really an issue? If yes i could use this cross-platform > solution to pin the key: > > > > https://github.com/awnumar/memguard > > > > > >> > >> > >> 2. How does the client communicate securely with the daemon? Which > encryption protocol/handshake is used for this? (If it just uses a socket, > what would prevent another process from reading out the master password?) > > > > > > It's in fact a unix domain socket file which is only accessible for the > owner of the key. ( Thanks for bringing this up, i forgot to flag the file > correctly - it's now fixed). > > Relying on the file permissions in unix shouldn't be a problem, right? > > > > cheers & again - many thanks, > > > > Matthias > > You seem to be putting a lot of trust in facilities that are trivially > exploitable to a determined attacker. For software like a password > manager, assuming the kernel is secure is a poor security model. In > addition to the existing attack surface, we live in a world where > side-channel attacks are becoming more common, e.g., Spectre and > Meltdown, so it isn't safe to assume the kernel or hardware are > secure. A password manager needs to have a robust security model that > has a minimal trust model if it is to be more than a toy. > > Just my $0.02 > > -- > Christopher Nielsen > "They who can give up essential liberty for temporary safety, deserve > neither liberty nor safety." --Benjamin Franklin > "The tree of liberty must be refreshed from time to time with the > blood of patriots & tyrants." --Thomas Jefferson > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
