Decrypt hsm_secret

[jb55]

Looks like @darosior added hsm key encryption: https://github.com/ElementsProject/lightning/pull/3129. It would be nice if clightning-dumpkeys supported this.

[jb55]

Looks like we can detect this if its > 32 bytes...

[darosior]

Oh what a nice tool ! I'm planning to improve hsmtools maybe we should combine efforts ?

I'll add a manpage and propose to add it to install for next release, as proposed by Zmn, I think the combination of hsmtools and your clightning-dumpkeys would be a great new binary for 0.9 :-)

[jb55]

@darosior oh I didn't realize there was an hsmtool, I created this awhile back when they said they weren't interested in adding tools to dump keys...