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// This file is dual licensed under the terms of the Apache License, Version
// 2.0, and the BSD License. See the LICENSE file in the root of this repository
// for complete details.
#![deny(rust_2018_idioms)]
use std::convert::TryInto;
#[pyo3::prelude::pyfunction]
fn encode_base64<'p>(py: pyo3::Python<'p>, data: &[u8]) -> &'p pyo3::types::PyBytes {
let output = base64::encode_config(data, base64::BCRYPT);
pyo3::types::PyBytes::new(py, output.as_bytes())
}
#[pyo3::prelude::pyfunction]
fn hashpass<'p>(
py: pyo3::Python<'p>,
password: &[u8],
salt: &[u8],
) -> pyo3::PyResult<&'p pyo3::types::PyBytes> {
// salt here is not just the salt bytes, but rather an encoded value
// containing a version number, number of rounds, and the salt.
// Should be [prefix, cost, hash]. This logic is copied from `bcrypt`
let raw_parts: Vec<_> = salt
.split(|&b| b == b'$')
.filter(|s| !s.is_empty())
.collect();
if raw_parts.len() != 3 {
return Err(pyo3::exceptions::PyValueError::new_err("Invalid salt"));
}
let version = match raw_parts[0] {
b"2y" => bcrypt::Version::TwoY,
b"2b" => bcrypt::Version::TwoB,
b"2a" => bcrypt::Version::TwoA,
b"2x" => bcrypt::Version::TwoX,
_ => {
return Err(pyo3::exceptions::PyValueError::new_err("Invalid salt"));
}
};
let cost = std::str::from_utf8(raw_parts[1])
.map_err(|_| pyo3::exceptions::PyValueError::new_err("Invalid salt"))?
.parse::<u32>()
.map_err(|_| pyo3::exceptions::PyValueError::new_err("Invalid salt"))?;
// The last component can contain either just the salt, or the salt and
// the result hash, depending on if the `salt` value come from `hashpw` or
// `gensalt`.
let raw_salt = base64::decode_config(&raw_parts[2][..22], base64::BCRYPT)
.map_err(|_| pyo3::exceptions::PyValueError::new_err("Invalid salt"))?
.try_into()
.map_err(|_| pyo3::exceptions::PyValueError::new_err("Invalid salt"))?;
let hashed = py.allow_threads(|| bcrypt::hash_with_salt(password, cost, raw_salt).unwrap());
Ok(pyo3::types::PyBytes::new(
py,
hashed.format_for_version(version).as_bytes(),
))
}
#[pyo3::prelude::pyfunction]
fn pbkdf<'p>(
py: pyo3::Python<'p>,
password: &[u8],
salt: &[u8],
rounds: u32,
desired_key_bytes: usize,
) -> pyo3::PyResult<&'p pyo3::types::PyBytes> {
pyo3::types::PyBytes::new_with(py, desired_key_bytes, |output| {
py.allow_threads(|| {
bcrypt_pbkdf::bcrypt_pbkdf(password, salt, rounds, output).unwrap();
});
Ok(())
})
}
#[pyo3::prelude::pymodule]
fn _bcrypt(_py: pyo3::Python<'_>, m: &pyo3::types::PyModule) -> pyo3::PyResult<()> {
m.add_function(pyo3::wrap_pyfunction!(encode_base64, m)?)?;
m.add_function(pyo3::wrap_pyfunction!(hashpass, m)?)?;
m.add_function(pyo3::wrap_pyfunction!(pbkdf, m)?)?;
Ok(())
}
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