mirror of https://github.com/ericonr/purr-c.git
41 lines
1.6 KiB
Markdown
41 lines
1.6 KiB
Markdown
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# purr-c
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This is a pure C client for the
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[PurritoBin](https://github.com/PurritoBin/PurritoBin) pastebin server, and uses
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PurritoBin's author's instance in <https://bsd.ac> by default.
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It was written as an exercise in learning network and crypto libraries, and uses
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[BearSSL](https://www.bearssl.org/) for symmetric encryption (supported by
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PurritoBin's online interface as well as its [suggested
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clients](https://github.com/PurritoBin/PurritoBin/tree/master/clients)) and SSL
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interaction with the server. For now, it also depends on
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[s6-networking](http://skarnet.org/software/s6-networking/)'s `sbearssl` library
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for certificate parsing.
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[libbaseencode](https://github.com/paolostivanin/libbaseencode) has been
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vendored in (can be found in `external/libbaseencode`), but has also gone
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through some changes, namely removing null-byte checking from the base64
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encoding function and adding an output length parameter to the base64 decoding
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function.
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The code has a few instances of `// TODO: remove hack` comments and the like,
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which I hope to get to someday.
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## Usage
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Usage information can be viewed with `purr -h`.
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## Build dependencies
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The build dependencies are the ones listed above: BearSSL and s6-networking, as
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well as GNU Make and a C compiler. This currently depends on Linux's
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`getrandom(2)` function, but I plan on adding at least an `arc4random_buf(3)`
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implementation.
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## Acknowledgements
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- Thomas Pornin for BearSSL
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- Laurent Bercot for s6-networking
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- epsilon-0 for PurritoBin (and the valuable help while I was testing this
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program)
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- paolostivanin for libbaseencode
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