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hashlib.rs
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391 lines (331 loc) · 11.4 KB
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// spell-checker:ignore usedforsecurity HASHXOF
pub(crate) use hashlib::make_module;
#[pymodule]
mod hashlib {
use crate::common::lock::PyRwLock;
use crate::vm::{
builtins::{PyBytes, PyStrRef, PyTypeRef},
function::{ArgBytesLike, FuncArgs, OptionalArg},
PyObjectRef, PyPayload, PyResult, VirtualMachine,
};
use blake2::{Blake2b512, Blake2s256};
use digest::{core_api::BlockSizeUser, DynDigest};
use digest::{ExtendableOutput, Update};
use dyn_clone::{clone_trait_object, DynClone};
use md5::Md5;
use sha1::Sha1;
use sha2::{Sha224, Sha256, Sha384, Sha512};
use sha3::{Sha3_224, Sha3_256, Sha3_384, Sha3_512, Shake128, Shake256};
#[derive(FromArgs)]
#[allow(unused)]
struct NewHashArgs {
#[pyarg(positional)]
name: PyStrRef,
#[pyarg(any, optional)]
data: OptionalArg<ArgBytesLike>,
#[pyarg(named, default = "true")]
usedforsecurity: bool,
}
#[derive(FromArgs)]
#[allow(unused)]
struct BlakeHashArgs {
#[pyarg(positional, optional)]
data: OptionalArg<ArgBytesLike>,
#[pyarg(named, default = "true")]
usedforsecurity: bool,
}
impl From<NewHashArgs> for BlakeHashArgs {
fn from(args: NewHashArgs) -> Self {
Self {
data: args.data,
usedforsecurity: args.usedforsecurity,
}
}
}
#[derive(FromArgs)]
#[allow(unused)]
struct HashArgs {
#[pyarg(any, optional)]
string: OptionalArg<ArgBytesLike>,
#[pyarg(named, default = "true")]
usedforsecurity: bool,
}
impl From<NewHashArgs> for HashArgs {
fn from(args: NewHashArgs) -> Self {
Self {
string: args.data,
usedforsecurity: args.usedforsecurity,
}
}
}
#[derive(FromArgs)]
#[allow(unused)]
struct XofDigestArgs {
#[pyarg(positional)]
length: isize,
}
impl XofDigestArgs {
fn length(&self, vm: &VirtualMachine) -> PyResult<usize> {
usize::try_from(self.length)
.map_err(|_| vm.new_value_error("length must be non-negative".to_owned()))
}
}
#[pyattr]
#[pyclass(module = "hashlib", name = "HASH")]
#[derive(PyPayload)]
struct PyHasher {
name: String,
ctx: PyRwLock<HashWrapper>,
}
impl std::fmt::Debug for PyHasher {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
write!(f, "HASH {}", self.name)
}
}
#[pyclass]
impl PyHasher {
fn new(name: &str, d: HashWrapper) -> Self {
PyHasher {
name: name.to_owned(),
ctx: PyRwLock::new(d),
}
}
#[pyslot]
fn slot_new(_cls: PyTypeRef, _args: FuncArgs, vm: &VirtualMachine) -> PyResult {
Err(vm.new_type_error("cannot create 'hashlib.HASH' instances".into()))
}
#[pygetset]
fn name(&self) -> String {
self.name.clone()
}
#[pygetset]
fn digest_size(&self) -> usize {
self.ctx.read().digest_size()
}
#[pygetset]
fn block_size(&self) -> usize {
self.ctx.read().block_size()
}
#[pymethod]
fn update(&self, data: ArgBytesLike) {
data.with_ref(|bytes| self.ctx.write().update(bytes));
}
#[pymethod]
fn digest(&self) -> PyBytes {
self.ctx.read().finalize().into()
}
#[pymethod]
fn hexdigest(&self) -> String {
hex::encode(self.ctx.read().finalize())
}
#[pymethod]
fn copy(&self) -> Self {
PyHasher::new(&self.name, self.ctx.read().clone())
}
}
#[pyattr]
#[pyclass(module = "hashlib", name = "HASHXOF")]
#[derive(PyPayload)]
struct PyHasherXof {
name: String,
ctx: PyRwLock<HashXofWrapper>,
}
impl std::fmt::Debug for PyHasherXof {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
write!(f, "HASHXOF {}", self.name)
}
}
#[pyclass]
impl PyHasherXof {
fn new(name: &str, d: HashXofWrapper) -> Self {
PyHasherXof {
name: name.to_owned(),
ctx: PyRwLock::new(d),
}
}
#[pyslot]
fn slot_new(_cls: PyTypeRef, _args: FuncArgs, vm: &VirtualMachine) -> PyResult {
Err(vm.new_type_error("cannot create 'hashlib.HASHXOF' instances".into()))
}
#[pygetset]
fn name(&self) -> String {
self.name.clone()
}
#[pygetset]
fn digest_size(&self) -> usize {
0
}
#[pygetset]
fn block_size(&self) -> usize {
self.ctx.read().block_size()
}
#[pymethod]
fn update(&self, data: ArgBytesLike) {
data.with_ref(|bytes| self.ctx.write().update(bytes));
}
#[pymethod]
fn digest(&self, args: XofDigestArgs, vm: &VirtualMachine) -> PyResult<PyBytes> {
Ok(self.ctx.read().finalize_xof(args.length(vm)?).into())
}
#[pymethod]
fn hexdigest(&self, args: XofDigestArgs, vm: &VirtualMachine) -> PyResult<String> {
Ok(hex::encode(self.ctx.read().finalize_xof(args.length(vm)?)))
}
#[pymethod]
fn copy(&self) -> Self {
PyHasherXof::new(&self.name, self.ctx.read().clone())
}
}
#[pyfunction(name = "new")]
fn hashlib_new(args: NewHashArgs, vm: &VirtualMachine) -> PyResult<PyObjectRef> {
match args.name.as_str().to_lowercase().as_str() {
"md5" => Ok(md5(args.into()).into_pyobject(vm)),
"sha1" => Ok(sha1(args.into()).into_pyobject(vm)),
"sha224" => Ok(sha224(args.into()).into_pyobject(vm)),
"sha256" => Ok(sha256(args.into()).into_pyobject(vm)),
"sha384" => Ok(sha384(args.into()).into_pyobject(vm)),
"sha512" => Ok(sha512(args.into()).into_pyobject(vm)),
"sha3_224" => Ok(sha3_224(args.into()).into_pyobject(vm)),
"sha3_256" => Ok(sha3_256(args.into()).into_pyobject(vm)),
"sha3_384" => Ok(sha3_384(args.into()).into_pyobject(vm)),
"sha3_512" => Ok(sha3_512(args.into()).into_pyobject(vm)),
"shake_128" => Ok(shake_128(args.into()).into_pyobject(vm)),
"shake_256" => Ok(shake_256(args.into()).into_pyobject(vm)),
"blake2b" => Ok(blake2b(args.into()).into_pyobject(vm)),
"blake2s" => Ok(blake2s(args.into()).into_pyobject(vm)),
other => Err(vm.new_value_error(format!("Unknown hashing algorithm: {other}"))),
}
}
#[pyfunction]
fn md5(args: HashArgs) -> PyHasher {
PyHasher::new("md5", HashWrapper::new::<Md5>(args.string))
}
#[pyfunction]
fn sha1(args: HashArgs) -> PyHasher {
PyHasher::new("sha1", HashWrapper::new::<Sha1>(args.string))
}
#[pyfunction]
fn sha224(args: HashArgs) -> PyHasher {
PyHasher::new("sha224", HashWrapper::new::<Sha224>(args.string))
}
#[pyfunction]
fn sha256(args: HashArgs) -> PyHasher {
PyHasher::new("sha256", HashWrapper::new::<Sha256>(args.string))
}
#[pyfunction]
fn sha384(args: HashArgs) -> PyHasher {
PyHasher::new("sha384", HashWrapper::new::<Sha384>(args.string))
}
#[pyfunction]
fn sha512(args: HashArgs) -> PyHasher {
PyHasher::new("sha512", HashWrapper::new::<Sha512>(args.string))
}
#[pyfunction]
fn sha3_224(args: HashArgs) -> PyHasher {
PyHasher::new("sha3_224", HashWrapper::new::<Sha3_224>(args.string))
}
#[pyfunction]
fn sha3_256(args: HashArgs) -> PyHasher {
PyHasher::new("sha3_256", HashWrapper::new::<Sha3_256>(args.string))
}
#[pyfunction]
fn sha3_384(args: HashArgs) -> PyHasher {
PyHasher::new("sha3_384", HashWrapper::new::<Sha3_384>(args.string))
}
#[pyfunction]
fn sha3_512(args: HashArgs) -> PyHasher {
PyHasher::new("sha3_512", HashWrapper::new::<Sha3_512>(args.string))
}
#[pyfunction]
fn shake_128(args: HashArgs) -> PyHasherXof {
PyHasherXof::new("shake_128", HashXofWrapper::new_shake_128(args.string))
}
#[pyfunction]
fn shake_256(args: HashArgs) -> PyHasherXof {
PyHasherXof::new("shake_256", HashXofWrapper::new_shake_256(args.string))
}
#[pyfunction]
fn blake2b(args: BlakeHashArgs) -> PyHasher {
PyHasher::new("blake2b", HashWrapper::new::<Blake2b512>(args.data))
}
#[pyfunction]
fn blake2s(args: BlakeHashArgs) -> PyHasher {
PyHasher::new("blake2s", HashWrapper::new::<Blake2s256>(args.data))
}
trait ThreadSafeDynDigest: DynClone + DynDigest + Sync + Send {}
impl<T> ThreadSafeDynDigest for T where T: DynClone + DynDigest + Sync + Send {}
clone_trait_object!(ThreadSafeDynDigest);
/// Generic wrapper patching around the hashing libraries.
#[derive(Clone)]
struct HashWrapper {
block_size: usize,
inner: Box<dyn ThreadSafeDynDigest>,
}
impl HashWrapper {
fn new<D>(data: OptionalArg<ArgBytesLike>) -> Self
where
D: ThreadSafeDynDigest + BlockSizeUser + Default + 'static,
{
let mut h = HashWrapper {
block_size: D::block_size(),
inner: Box::<D>::default(),
};
if let OptionalArg::Present(d) = data {
d.with_ref(|bytes| h.update(bytes));
}
h
}
fn update(&mut self, data: &[u8]) {
self.inner.update(data);
}
fn block_size(&self) -> usize {
self.block_size
}
fn digest_size(&self) -> usize {
self.inner.output_size()
}
fn finalize(&self) -> Vec<u8> {
let cloned = self.inner.box_clone();
cloned.finalize().into_vec()
}
}
#[derive(Clone)]
enum HashXofWrapper {
Shake128(Shake128),
Shake256(Shake256),
}
impl HashXofWrapper {
fn new_shake_128(data: OptionalArg<ArgBytesLike>) -> Self {
let mut h = HashXofWrapper::Shake128(Shake128::default());
if let OptionalArg::Present(d) = data {
d.with_ref(|bytes| h.update(bytes));
}
h
}
fn new_shake_256(data: OptionalArg<ArgBytesLike>) -> Self {
let mut h = HashXofWrapper::Shake256(Shake256::default());
if let OptionalArg::Present(d) = data {
d.with_ref(|bytes| h.update(bytes));
}
h
}
fn update(&mut self, data: &[u8]) {
match self {
HashXofWrapper::Shake128(h) => h.update(data),
HashXofWrapper::Shake256(h) => h.update(data),
}
}
fn block_size(&self) -> usize {
match self {
HashXofWrapper::Shake128(_) => Shake128::block_size(),
HashXofWrapper::Shake256(_) => Shake256::block_size(),
}
}
fn finalize_xof(&self, length: usize) -> Vec<u8> {
match self {
HashXofWrapper::Shake128(h) => h.clone().finalize_boxed(length).into_vec(),
HashXofWrapper::Shake256(h) => h.clone().finalize_boxed(length).into_vec(),
}
}
}
}