Add support for wasm32-pyodide

[alarmfox]

Summary

I was trying to use this library in Pyodide WASM runtime but it was not supported.

I added the required packages according to their guidelines. There are issues in Threading so I added a check for parallelism != 1 based on the platform.machine().

Pyodide patch

diff --git a/packages/argon2-cffi-bindings/meta.yaml b/packages/argon2-cffi-bindings/meta.yaml
new file mode 100644
index 00000000..45d4e75f
--- /dev/null
+++ b/packages/argon2-cffi-bindings/meta.yaml
@@ -0,0 +1,21 @@
+package:
+  name: argon2-cffi-bindings
+  version: 21.2.0
+  top-level:
+    - _argon2_cffi_bindings
+source:
+  url: https://files.pythonhosted.org/packages/b9/e9/184b8ccce6683b0aa2fbb7ba5683ea4b9c5763f1356347f1312c32e3c66e/argon2-cffi-bindings-21.2.0.tar.gz
+  sha256: bb89ceffa6c791807d1305ceb77dbfacc5aa499891d2c55661c6459651fc39e3
+about:
+  home: https://github.com/hynek/argon2-cffi-bindings
+  PyPI: https://pypi.org/project/argon2-cffi-bindings
+  summary: Low-level CFFI bindings for Argon2
+  license: MIT
+extra:
+  recipe-maintainers:
+    - alarmfox
+requirements:
+  run:
+    - cffi
+build:
+  cflags: -msimd128
diff --git a/packages/argon2-cffi/meta.yaml b/packages/argon2-cffi/meta.yaml
new file mode 100644
index 00000000..e4e8f760
--- /dev/null
+++ b/packages/argon2-cffi/meta.yaml
@@ -0,0 +1,19 @@
+package:
+  name: argon2-cffi
+  version: 23.1.0
+  top-level:
+    - argon2
+source:
+  url: https://files.pythonhosted.org/packages/a4/6a/e8a041599e78b6b3752da48000b14c8d1e8a04ded09c88c714ba047f34f5/argon2_cffi-23.1.0-py3-none-any.whl
+  sha256: c670642b78ba29641818ab2e68bd4e6a78ba53b7eff7b4c3815ae16abf91c7ea
+about:
+  home: ""
+  PyPI: https://pypi.org/project/argon2-cffi
+  summary: Argon2 for Python
+  license: ""
+extra:
+  recipe-maintainers:
+    - alarmfox
+requirements:
+  run:
+    - cffi
diff --git a/packages/argon2-cffi/test_argon2-cffi.py b/packages/argon2-cffi/test_argon2-cffi.py
new file mode 100644
index 00000000..c914cda8
--- /dev/null
+++ b/packages/argon2-cffi/test_argon2-cffi.py
@@ -0,0 +1,9 @@
+from pytest_pyodide import run_in_pyodide
+
+@run_in_pyodide(packages=["argon2-cffi"])
+def test_argon2_cffi():
+    import argon2
+    ph = argon2.PasswordHasher(parallelism=1)
+    hash = ph.hash("test")
+
+    assert ph.verify(hash, "test") == True

Alternative solution

Pyodide supports patching: instead of providing wheel one could provide the source code and this patch, but there will need to build everything from scratch.

Can we work this out?

[alarmfox]

Hello, thanks for the response!
I added a few functions in utils.py and profiles.py cleaning up the PasswordHasher class.
Let me know if this fits your idea.

[agriyakhetarpal]

Of course, not a maintainer here – but I agree with the idea. Thanks, @alarmfox!

[hynek]

This class needs to be added to the API docs.

[hynek]

let's make this a parametrization

[hynek]

I was trying to fix it up locally, but unfortunately you opened the PR from your main branch so I couldn't push my changes. There's a reason I beg people to not do that in the PR template, so it would be nice if you could follow that advice in the future.

edit: i have just noticed that this repo was lacking said template and have added it now in 8041a04