Added a randomnumber generator function for WASI to support WebAssembly PQ crypto #405
Conversation
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The common files in PQClean aren't actually super recommended for redistribution as they (notably the symmetric crypto stuff) do contain some things, which have significant impact on performance, included only for testing reasons. Additionally this file should probably first be updated upstream at https://GitHub.com/dsprenkels/randombytes/. |
Will take a look into this and get back to you ASAP |
There done - added a pullrequest on the upstream as well |
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If merged at upstream we might update this file, but I think in general downstream consumers of implementations from PQClean should provide their own random number generator. PQClean is not intended as a library. |
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The randombytes.c file was merged upstream |
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Closed in favor of #425 |
As a part of a project I am working on there is a heavy use of quantum resistant crypto.
Now that I am porting the library (https://github.com/john-sharratt/ate) over to WebAssembly so that it can run in a web browser I need the same crypto functions to work in wasm32 under wasi however there are no known libraries in rust that support such routines other than pqcrypto - hence I started porting it....
Thus, given that pqcrypto did not yet work on wasi I forked it to add support for compiling to target=wasm32-wasi (https://github.com/john-sharratt/pqcrypto-wasi) - most of it compiles except for the random generator which is runtime specific thus I have added a function within WASI.
The pull request over at pqcrypto is here:
rustpq/pqcrypto#22
The new function only impacts builds that target wasi hence it is fully forwards and backwards compatible.
To compile you need to use target wasm32-wasi and must have wasi-libc - take a look at this repo for an example on how to compile it:
https://github.com/john-sharratt/pqcrypto-wasi