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Port a tiny tiny bit of the ASN.1 parsing to Rust
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@@ -12,3 +12,5 @@ htmlcov/ | |
| .eggs/ | ||
| *.py[cdo] | ||
| .hypothesis/ | ||
| target/ | ||
| Cargo.lock | ||
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| [package] | ||
| name = "cryptography-rust" | ||
| version = "0.1.0" | ||
| authors = ["The cryptography developers <cryptography-dev@python.org>"] | ||
| edition = "2018" | ||
| publish = false | ||
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| [dependencies] | ||
| asn1 = { git = "https://github.com/alex/rust-asn1" } | ||
| pyo3 = { version = "0.11", features = ["extension-module"] } | ||
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| [lib] | ||
| name = "cryptography_rust" | ||
| crate-type = ["cdylib"] |
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| use pyo3::conversion::ToPyObject; | ||
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| enum PyAsn1Error { | ||
| Asn1(asn1::ParseError), | ||
| Py(pyo3::PyErr), | ||
| } | ||
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| impl From<asn1::ParseError> for PyAsn1Error { | ||
| fn from(e: asn1::ParseError) -> PyAsn1Error { | ||
| PyAsn1Error::Asn1(e) | ||
| } | ||
| } | ||
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| impl From<pyo3::PyErr> for PyAsn1Error { | ||
| fn from(e: pyo3::PyErr) -> PyAsn1Error { | ||
| PyAsn1Error::Py(e) | ||
| } | ||
| } | ||
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| impl From<PyAsn1Error> for pyo3::PyErr { | ||
| fn from(e: PyAsn1Error) -> pyo3::PyErr { | ||
| match e { | ||
| PyAsn1Error::Asn1(asn1_error) => pyo3::exceptions::ValueError::py_err(format!( | ||
| "error parsing asn1 value: {:?}", | ||
| asn1_error | ||
| )), | ||
| PyAsn1Error::Py(py_error) => py_error, | ||
| } | ||
| } | ||
| } | ||
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| #[pyo3::prelude::pyfunction] | ||
| fn parse_tls_feature(py: pyo3::Python<'_>, data: &[u8]) -> pyo3::PyResult<pyo3::PyObject> { | ||
| let tls_feature_type_to_enum = py | ||
| .import("cryptography.x509.extensions")? | ||
| .getattr("_TLS_FEATURE_TYPE_TO_ENUM")?; | ||
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| let features = asn1::parse::<_, PyAsn1Error, _>(data, |p| { | ||
| p.read_element::<asn1::Sequence>()?.parse(|p| { | ||
| let features = pyo3::types::PyList::empty(py); | ||
| while !p.is_empty() { | ||
| let feature = p.read_element::<u64>()?; | ||
| let py_feature = tls_feature_type_to_enum.get_item(feature.to_object(py))?; | ||
| features.append(py_feature)? | ||
| } | ||
| Ok(features) | ||
| }) | ||
| })?; | ||
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| let x509_module = py.import("cryptography.x509")?; | ||
| x509_module | ||
| .call1("TLSFeature", (features,)) | ||
| .map(|o| o.to_object(py)) | ||
| } | ||
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| #[pyo3::prelude::pyfunction] | ||
| fn parse_precert_poison(py: pyo3::Python<'_>, data: &[u8]) -> pyo3::PyResult<pyo3::PyObject> { | ||
| asn1::parse::<_, PyAsn1Error, _>(data, |p| { | ||
| p.read_element::<()>()?; | ||
| Ok(()) | ||
| })?; | ||
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| let x509_module = py.import("cryptography.x509")?; | ||
| x509_module.call0("PrecertPoison").map(|o| o.to_object(py)) | ||
| } | ||
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| #[pyo3::prelude::pymodule] | ||
| fn _rust(_py: pyo3::Python<'_>, m: &pyo3::types::PyModule) -> pyo3::PyResult<()> { | ||
| m.add_wrapped(pyo3::wrap_pyfunction!(parse_tls_feature))?; | ||
| m.add_wrapped(pyo3::wrap_pyfunction!(parse_precert_poison))?; | ||
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| Ok(()) | ||
| } |
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