Jarkko Sakkinen
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489OpenPGP: 3AB05486C7752FE1
Jarkko Sakkinen
jarkko
IMHO the thing in Rust and drivers is not memory safe per se or like "overflow check type of stuff".
It's the structural integrity check that levels up over C really. E.g. in C world I check that a TPM command holding buffer is not too large.
In Rust world I'll check in byte granularity that the data coming from user space and the chip is correct.
It's the structural integrity check that levels up over C really. E.g. in C world I check that a TPM command holding buffer is not too large.
In Rust world I'll check in byte granularity that the data coming from user space and the chip is correct.
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Jarkko Sakkinen
jarkko
Edited 25 days ago
Do rustc eBPF branches unroll loops if they have const limit known by compiler?
I'm just thinking of theory of running tpm2_protocol inside eBPF filter i.e., is it possible and how much effort it would take it realize.
would be just a cool demo
it has lot of characteristics i.e. no-alloc (fully in-stack) and test program compiles without cargo with just rustc.
#linux #kernel #ebpf #rust #tpm
I'm just thinking of theory of running tpm2_protocol inside eBPF filter i.e., is it possible and how much effort it would take it realize.
would be just a cool demo
it has lot of characteristics i.e. no-alloc (fully in-stack) and test program compiles without cargo with just rustc.
#linux #kernel #ebpf #rust #tpm
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Jarkko Sakkinen
jarkko
Edited 25 days ago
the future of zmodem is async as I refined zmodem2 API as follows:
1. ZmodemSession holds the protocol state.
2. ZmodemEvent provides the interface for consuming next events.
I.e. it is to bind to the future (while being still decoupled from them). Also next version of protocol will be zero deps and can compile with rustc only.
#zmodem #rust
1. ZmodemSession holds the protocol state.
2. ZmodemEvent provides the interface for consuming next events.
I.e. it is to bind to the future (while being still decoupled from them). Also next version of protocol will be zero deps and can compile with rustc only.
#zmodem #rust
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Jarkko Sakkinen
jarkko
tpm2_protocol 0.6.1
0.6.0 and 0.6.1 are really the same, i just fucked up tpm2sh 0.6.0 so...
https://lore.kernel.org/tpm2/aKI-xQsBNNvjeBSk@kernel.org/T/#u
0.6.0 and 0.6.1 are really the same, i just fucked up tpm2sh 0.6.0 so...
https://lore.kernel.org/tpm2/aKI-xQsBNNvjeBSk@kernel.org/T/#u
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Jarkko Sakkinen
jarkko
Edited 26 days ago
OK, learning Rust as I got but I was still missing Any implementation so here it is:
https://github.com/puavo-org/tpm2_library/commit/5066da1e529c2c6fc3667ae1e4f2be397836684b
This is a milestone commit given that the implementation is capable of empowering driver, which is a consequence of being able to dynamically interpret the protocol byte stream. I.e. starting from this commit ID it would it driver implementation ready.
It is proven by the test that builds a 100 element list of random objects, streams the list and parses from stream another list, and finally compares that the lists have equal amount of element and each element matches each other.
The test is here:
https://github.com/puavo-org/tpm2_library/blob/main/tpm2sh/tests/dynamic.rs
https://github.com/puavo-org/tpm2_library/commit/5066da1e529c2c6fc3667ae1e4f2be397836684b
This is a milestone commit given that the implementation is capable of empowering driver, which is a consequence of being able to dynamically interpret the protocol byte stream. I.e. starting from this commit ID it would it driver implementation ready.
It is proven by the test that builds a 100 element list of random objects, streams the list and parses from stream another list, and finally compares that the lists have equal amount of element and each element matches each other.
The test is here:
https://github.com/puavo-org/tpm2_library/blob/main/tpm2sh/tests/dynamic.rs
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Jarkko Sakkinen
jarkko
My favorite command-line parser for Rust:
https://github.com/blyxxyz/lexopt
I.e. it does not create command-line for you and you can fully control of the user experience.
https://github.com/blyxxyz/lexopt
I.e. it does not create command-line for you and you can fully control of the user experience.
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Jarkko Sakkinen
jarkko
Edited 28 days ago
I mean cli is a gui of one form and usuall guis are not sprayed to the source code
https://github.com/puavo-org/tpm2_library/commit/ddbce9387119c77b618988cd875dcbec812d7b96
https://github.com/puavo-org/tpm2_library/commit/ddbce9387119c77b618988cd875dcbec812d7b96
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Jarkko Sakkinen
jarkko
I wonder if it either is or could be allowed kselftest to be written in Rust assuming that it requires only rustc and has at most std dependencies? Not talking a cargo build here.
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Jarkko Sakkinen
jarkko
Procedural macros in Rust:
- How to use them with plain rustc?
- Why they need to be in a lib crate?
- How to use them with plain rustc?
- Why they need to be in a lib crate?
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Jarkko Sakkinen
jarkko
Edited 28 days ago
The most important setting in fish shell:
set -g fish_autosuggestion_enabled 0
Fucking worst default in a shell that anyone has ever put to any shell (unless you are going epileptic seizure)
set -g fish_autosuggestion_enabled 0
Fucking worst default in a shell that anyone has ever put to any shell (unless you are going epileptic seizure)
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Jarkko Sakkinen
jarkko
My tpm2_protocol crate could be useful also for e.g. some scenarios where you to format your crypto proofs in TPM2 structures wi/o having TPM.
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Jarkko Sakkinen
jarkko
Great, I've used before external crate for this:
https://doc.rust-lang.org/beta/std/io/trait.IsTerminal.html
Apparently std has had this for over two years already.
https://doc.rust-lang.org/beta/std/io/trait.IsTerminal.html
Apparently std has had this for over two years already.
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Jarkko Sakkinen
jarkko
the next thing i do for tpm2_protocol is render out "rstest" and "hex" from cargo test and make my macro auto-generate roundtrip tests.
i'll also add a Makefile to the root with "make test" target. It will build the test binary with rustc and run the tests. Finally this will be added to the CI.
i'll also add a Makefile to the root with "make test" target. It will build the test binary with rustc and run the tests. Finally this will be added to the CI.
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Jarkko Sakkinen
jarkko
typoed rust-for-linux to my annoucement by accident as ust-for-linux ****
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Jarkko Sakkinen
jarkko
This was nasty one to fix and took many days (and nights tbh) but now finally command parsing is fixed and all my tests pass:
https://github.com/puavo-org/tpm2_library/commit/7b0fc824bd341fb21c90a06b945f01feb1c20f5e
There's MS TPM 2.0 emulator and swtpm, and that's like all of command parsing and response synthesis I'm aware of. I.e. by practical means there was no useful existing work to take example of :-) I'm pretty happy and a bit proud too that I've reach unipolarity by writing Rust macros reflecting TCG specifications.
I don't have now known bugs in the protocol crate. I'm sure there's a bunch but still feels nice after 1.5 weeks of sleepless nights and 7K SLOC of code (protocol + cli).
#linux #kernel #rust #tpm
https://github.com/puavo-org/tpm2_library/commit/7b0fc824bd341fb21c90a06b945f01feb1c20f5e
There's MS TPM 2.0 emulator and swtpm, and that's like all of command parsing and response synthesis I'm aware of. I.e. by practical means there was no useful existing work to take example of :-) I'm pretty happy and a bit proud too that I've reach unipolarity by writing Rust macros reflecting TCG specifications.
I don't have now known bugs in the protocol crate. I'm sure there's a bunch but still feels nice after 1.5 weeks of sleepless nights and 7K SLOC of code (protocol + cli).
#linux #kernel #rust #tpm
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