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* improve JSONJoey Hess2017-04-14
| | | | | | | | | | | | | | | | | | | | | | | Most of the time, ByteStrings will be able to be encoded as utf8, so avoid base64 when not needed. Adjusted some of the types in order to generate more usual JSON. In particular, removed StartActivity. The JSON now looks like this (with the signature still not populated): {"signature":{"v":""},"prevActivity":{"hashValue":{"v":"3b1abe614dd43bdb2d9a56777884e2d0f3bac9796e2d25c1ad52bb689c117286"},"hashMethod":"SHA256"},"activity":{"echoData":{"v":""},"enteredData":{"v":"l"}}} 203 bytes to send a single keystroke is not great when there's really only 1+64(hash) bytes of unique data. So, may end up adding a wire encoding on top of this. But, JSON is good to have for storage of the proofs, etc. Also, it does compress well. Two such JSON objects gzip -9 to 219 bytes, and three to 265 bytes. So, 37 bytes per keystroke. This is *exactly* as efficient as gzip -9 of $c$hash formatted data. This commit was sponsored by Jack Hill on Patreon.
* add JSON serializationJoey Hess2017-04-14
| | | | | | | Fairly straightforward, but did have to decide how to encode all the ByteStrings, since they are not necessarily utf-8. Used base64. This commit was sponsored by Henrik Riomar on Patreon.
* use posix-pty, and forward SIGWINCHJoey Hess2017-04-13
| | | | | | | | | | | | | | | | I discovered the posix-pty library while looking for a way to forward SIGWINCH to the slave pty. It's taken care of a lot of nasty pty handling details, so let's use it! Unfortunately, this broke control-d exiting debug-me, which used to work great. I think that the problem is that readPty never returns B.empty, even on control-d. Or perhaps, posix-pty is doing something to the pty that prevents control-d getting through. I kept all the withoutMode code; at least withoutMode EnableEcho is still needed. This commit was sponsored by Jochen Bartl on Patreon.
* use Activity types for user<->developer communicationJoey Hess2017-04-12
| | | | | | | | | | | | | | | Still all in a single process with no serialization, but now there are separate threads for the user and developer sides, and they communicate Activity back and forth. Signatures are not checked yet, but both user and developer check that the other side is sending Activity that forms a valid hash chain with previous Activity. The echo simulation is included, but may be buggy. This seems to work well enough with 0 latency at least. This commit was sponsored by Thom May on Patreon.
* debug-me is able to run a shell in a slave ptyJoey Hess2017-04-11
| | | | | | | Lots of terminal mode fun. Has a few warts still, but it works well enough to be comfortable, and even vim works ok. This commit was sponsored by John Peloquin on Patreon.
* some basic data types and hashing to start debug-meJoey Hess2017-04-11
This commit was sponsored by Denis Dzyubenko on Patreon.