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// spell-checker:ignore usedforsecurity HASHXOF hashopenssl dklen
// NOTE: Function names like `openssl_md5` match CPython's `_hashopenssl.c` interface
// for compatibility, but the implementation uses pure Rust crates (md5, sha2, etc.),
// not OpenSSL.
pub(crate) use _hashlib::module_def;
#[pymodule]
pub mod _hashlib {
use crate::common::lock::PyRwLock;
use crate::vm::{
Py, PyObjectRef, PyPayload, PyResult, VirtualMachine,
builtins::{
PyBaseExceptionRef, PyBytes, PyFrozenSet, PyStr, PyTypeRef, PyUtf8StrRef, PyValueError,
},
class::StaticType,
function::{ArgBytesLike, ArgStrOrBytesLike, FuncArgs, OptionalArg},
types::{Constructor, Representable},
};
use blake2::{Blake2b512, Blake2s256};
use digest::{DynDigest, OutputSizeUser, core_api::BlockSizeUser};
use digest::{ExtendableOutput, Update};
use dyn_clone::{DynClone, clone_trait_object};
use hmac::Mac;
use md5::Md5;
use sha1::Sha1;
use sha2::{Sha224, Sha256, Sha384, Sha512};
use sha3::{Sha3_224, Sha3_256, Sha3_384, Sha3_512, Shake128, Shake256};
const HASH_ALGORITHMS: &[&str] = &[
"md5",
"sha1",
"sha224",
"sha256",
"sha384",
"sha512",
"sha3_224",
"sha3_256",
"sha3_384",
"sha3_512",
"shake_128",
"shake_256",
"blake2b",
"blake2s",
];
#[pyattr]
const _GIL_MINSIZE: usize = 2048;
#[pyattr]
#[pyexception(name = "UnsupportedDigestmodError", base = PyValueError, impl)]
#[derive(Debug)]
#[repr(transparent)]
pub struct UnsupportedDigestmodError(PyValueError);
#[pyattr]
fn openssl_md_meth_names(vm: &VirtualMachine) -> PyObjectRef {
PyFrozenSet::from_iter(
vm,
HASH_ALGORITHMS.iter().map(|n| vm.ctx.new_str(*n).into()),
)
.expect("failed to create openssl_md_meth_names frozenset")
.into_ref(&vm.ctx)
.into()
}
#[pyattr]
fn _constructors(vm: &VirtualMachine) -> PyObjectRef {
let dict = vm.ctx.new_dict();
for name in HASH_ALGORITHMS {
let s = vm.ctx.new_str(*name);
dict.set_item(&*s, s.clone().into(), vm).unwrap();
}
dict.into()
}
#[derive(FromArgs, Debug)]
#[allow(unused)]
struct NewHashArgs {
#[pyarg(positional)]
name: PyUtf8StrRef,
#[pyarg(any, optional)]
data: OptionalArg<ArgBytesLike>,
#[pyarg(named, default = true)]
usedforsecurity: bool,
#[pyarg(named, optional)]
string: OptionalArg<ArgBytesLike>,
}
#[derive(FromArgs)]
#[allow(unused)]
pub struct BlakeHashArgs {
#[pyarg(any, optional)]
pub data: OptionalArg<ArgBytesLike>,
#[pyarg(named, default = true)]
usedforsecurity: bool,
#[pyarg(named, optional)]
pub string: OptionalArg<ArgBytesLike>,
}
impl From<NewHashArgs> for BlakeHashArgs {
fn from(args: NewHashArgs) -> Self {
Self {
data: args.data,
usedforsecurity: args.usedforsecurity,
string: args.string,
}
}
}
#[derive(FromArgs, Debug)]
#[allow(unused)]
pub struct HashArgs {
#[pyarg(any, optional)]
pub data: OptionalArg<ArgBytesLike>,
#[pyarg(named, default = true)]
usedforsecurity: bool,
#[pyarg(named, optional)]
pub string: OptionalArg<ArgBytesLike>,
}
impl From<NewHashArgs> for HashArgs {
fn from(args: NewHashArgs) -> Self {
Self {
data: args.data,
usedforsecurity: args.usedforsecurity,
string: args.string,
}
}
}
const KECCAK_WIDTH_BITS: usize = 1600;
fn keccak_suffix(name: &str) -> Option<u8> {
match name {
"sha3_224" | "sha3_256" | "sha3_384" | "sha3_512" => Some(0x06),
"shake_128" | "shake_256" => Some(0x1f),
_ => None,
}
}
fn keccak_rate_bits(name: &str, block_size: usize) -> Option<usize> {
keccak_suffix(name).map(|_| block_size * 8)
}
fn keccak_capacity_bits(name: &str, block_size: usize) -> Option<usize> {
keccak_rate_bits(name, block_size).map(|rate| KECCAK_WIDTH_BITS - rate)
}
fn missing_hash_attribute<T>(vm: &VirtualMachine, class_name: &str, attr: &str) -> PyResult<T> {
Err(vm.new_attribute_error(format!("'{class_name}' object has no attribute '{attr}'")))
}
#[derive(FromArgs)]
#[allow(unused)]
struct XofDigestArgs {
#[pyarg(positional)]
length: isize,
}
impl XofDigestArgs {
// Match CPython's SHAKE output guard in Modules/sha3module.c.
const MAX_SHAKE_OUTPUT_LENGTH: usize = 1 << 29;
fn length(&self, vm: &VirtualMachine) -> PyResult<usize> {
let length = usize::try_from(self.length)
.map_err(|_| vm.new_value_error("length must be non-negative"))?;
if length >= Self::MAX_SHAKE_OUTPUT_LENGTH {
return Err(vm.new_value_error("length is too large"));
}
Ok(length)
}
}
#[derive(FromArgs)]
#[allow(unused)]
struct HmacDigestArgs {
#[pyarg(positional)]
key: ArgBytesLike,
#[pyarg(positional)]
msg: ArgBytesLike,
#[pyarg(positional)]
digest: PyObjectRef,
}
#[derive(FromArgs)]
#[allow(unused)]
struct Pbkdf2HmacArgs {
#[pyarg(any)]
hash_name: PyUtf8StrRef,
#[pyarg(any)]
password: ArgBytesLike,
#[pyarg(any)]
salt: ArgBytesLike,
#[pyarg(any)]
iterations: i64,
#[pyarg(any, optional)]
dklen: OptionalArg<PyObjectRef>,
}
fn resolve_data(
data: OptionalArg<ArgBytesLike>,
string: OptionalArg<ArgBytesLike>,
vm: &VirtualMachine,
) -> PyResult<OptionalArg<ArgBytesLike>> {
match (data.into_option(), string.into_option()) {
(Some(d), None) => Ok(OptionalArg::Present(d)),
(None, Some(s)) => Ok(OptionalArg::Present(s)),
(None, None) => Ok(OptionalArg::Missing),
(Some(_), Some(_)) => Err(vm.new_type_error(
"'data' and 'string' are mutually exclusive \
and support for 'string' keyword parameter \
is slated for removal in a future version.",
)),
}
}
fn resolve_digestmod(digestmod: &PyObjectRef, vm: &VirtualMachine) -> PyResult<String> {
if let Some(name) = digestmod.downcast_ref::<PyStr>()
&& let Some(name_str) = name.to_str()
{
return Ok(name_str.to_lowercase());
}
if let Ok(name_obj) = digestmod.get_attr("__name__", vm)
&& let Some(name) = name_obj.downcast_ref::<PyStr>()
&& let Some(name_str) = name.to_str()
&& let Some(algo) = name_str.strip_prefix("openssl_")
{
return Ok(algo.to_owned());
}
Err(vm.new_exception_msg(
UnsupportedDigestmodError::static_type().to_owned(),
"unsupported digestmod".into(),
))
}
fn hash_digest_size(name: &str) -> Option<usize> {
match name {
"md5" => Some(16),
"sha1" => Some(20),
"sha224" => Some(28),
"sha256" => Some(32),
"sha384" => Some(48),
"sha512" => Some(64),
"sha3_224" => Some(28),
"sha3_256" => Some(32),
"sha3_384" => Some(48),
"sha3_512" => Some(64),
"blake2b" => Some(64),
"blake2s" => Some(32),
_ => None,
}
}
fn unsupported_hash(name: &str, vm: &VirtualMachine) -> PyBaseExceptionRef {
vm.new_exception_msg(
UnsupportedDigestmodError::static_type().to_owned(),
format!("unsupported hash type {name}").into(),
)
}
// Object-safe HMAC trait for type-erased dispatch
trait DynHmac: Send + Sync {
fn dyn_update(&mut self, data: &[u8]);
fn dyn_finalize(&self) -> Vec<u8>;
fn dyn_clone(&self) -> Box<dyn DynHmac>;
}
struct TypedHmac<D>(D);
impl<D> DynHmac for TypedHmac<D>
where
D: Mac + Clone + Send + Sync + 'static,
{
fn dyn_update(&mut self, data: &[u8]) {
Mac::update(&mut self.0, data);
}
fn dyn_finalize(&self) -> Vec<u8> {
self.0.clone().finalize().into_bytes().to_vec()
}
fn dyn_clone(&self) -> Box<dyn DynHmac> {
Box::new(TypedHmac(self.0.clone()))
}
}
#[pyattr]
#[pyclass(module = "_hashlib", name = "HMAC")]
#[derive(PyPayload)]
pub struct PyHmac {
algo_name: String,
digest_size: usize,
block_size: usize,
ctx: PyRwLock<Box<dyn DynHmac>>,
}
impl core::fmt::Debug for PyHmac {
fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
write!(f, "HMAC {}", self.algo_name)
}
}
#[pyclass(with(Representable), flags(IMMUTABLETYPE))]
impl PyHmac {
#[pyslot]
fn slot_new(_cls: PyTypeRef, _args: FuncArgs, vm: &VirtualMachine) -> PyResult {
Err(vm.new_type_error("cannot create '_hashlib.HMAC' instances"))
}
#[pygetset]
fn name(&self) -> String {
format!("hmac-{}", self.algo_name)
}
#[pygetset]
fn digest_size(&self) -> usize {
self.digest_size
}
#[pygetset]
fn block_size(&self) -> usize {
self.block_size
}
#[pymethod]
fn update(&self, msg: ArgBytesLike) {
msg.with_ref(|bytes| self.ctx.write().dyn_update(bytes));
}
#[pymethod]
fn digest(&self) -> PyBytes {
self.ctx.read().dyn_finalize().into()
}
#[pymethod]
fn hexdigest(&self) -> String {
hex::encode(self.ctx.read().dyn_finalize())
}
#[pymethod]
fn copy(&self) -> Self {
Self {
algo_name: self.algo_name.clone(),
digest_size: self.digest_size,
block_size: self.block_size,
ctx: PyRwLock::new(self.ctx.read().dyn_clone()),
}
}
}
impl Representable for PyHmac {
fn repr_str(zelf: &Py<Self>, _vm: &VirtualMachine) -> PyResult<String> {
Ok(format!(
"<{} HMAC object @ {:#x}>",
zelf.algo_name, zelf as *const _ as usize
))
}
}
#[pyattr]
#[pyclass(module = "_hashlib", name = "HASH")]
#[derive(PyPayload)]
pub struct PyHasher {
pub name: String,
pub ctx: PyRwLock<HashWrapper>,
}
impl core::fmt::Debug for PyHasher {
fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
write!(f, "HASH {}", self.name)
}
}
#[pyclass(with(Representable), flags(IMMUTABLETYPE))]
impl PyHasher {
fn new(name: &str, d: HashWrapper) -> Self {
Self {
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"))
}
#[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()
}
#[pygetset]
fn _capacity_bits(&self, vm: &VirtualMachine) -> PyResult<usize> {
let block_size = self.ctx.read().block_size();
match keccak_capacity_bits(&self.name, block_size) {
Some(capacity) => Ok(capacity),
None => missing_hash_attribute(vm, "HASH", "_capacity_bits"),
}
}
#[pygetset]
fn _rate_bits(&self, vm: &VirtualMachine) -> PyResult<usize> {
let block_size = self.ctx.read().block_size();
match keccak_rate_bits(&self.name, block_size) {
Some(rate) => Ok(rate),
None => missing_hash_attribute(vm, "HASH", "_rate_bits"),
}
}
#[pygetset]
fn _suffix(&self, vm: &VirtualMachine) -> PyResult<PyBytes> {
match keccak_suffix(&self.name) {
Some(suffix) => Ok(vec![suffix].into()),
None => missing_hash_attribute(vm, "HASH", "_suffix"),
}
}
#[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 {
Self::new(&self.name, self.ctx.read().clone())
}
}
impl Representable for PyHasher {
fn repr_str(zelf: &Py<Self>, _vm: &VirtualMachine) -> PyResult<String> {
Ok(format!(
"<{} _hashlib.HASH object @ {:#x}>",
zelf.name, zelf as *const _ as usize
))
}
}
#[pyattr]
#[pyclass(module = "_hashlib", name = "HASHXOF")]
#[derive(PyPayload)]
pub struct PyHasherXof {
name: String,
ctx: PyRwLock<HashXofWrapper>,
}
impl core::fmt::Debug for PyHasherXof {
fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
write!(f, "HASHXOF {}", self.name)
}
}
#[pyclass(with(Representable), flags(IMMUTABLETYPE))]
impl PyHasherXof {
fn new(name: &str, d: HashXofWrapper) -> Self {
Self {
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"))
}
#[pygetset]
fn name(&self) -> String {
self.name.clone()
}
#[pygetset]
const fn digest_size(&self) -> usize {
0
}
#[pygetset]
fn block_size(&self) -> usize {
self.ctx.read().block_size()
}
#[pygetset]
fn _capacity_bits(&self, vm: &VirtualMachine) -> PyResult<usize> {
let block_size = self.ctx.read().block_size();
match keccak_capacity_bits(&self.name, block_size) {
Some(capacity) => Ok(capacity),
None => missing_hash_attribute(vm, "HASHXOF", "_capacity_bits"),
}
}
#[pygetset]
fn _rate_bits(&self, vm: &VirtualMachine) -> PyResult<usize> {
let block_size = self.ctx.read().block_size();
match keccak_rate_bits(&self.name, block_size) {
Some(rate) => Ok(rate),
None => missing_hash_attribute(vm, "HASHXOF", "_rate_bits"),
}
}
#[pygetset]
fn _suffix(&self, vm: &VirtualMachine) -> PyResult<PyBytes> {
match keccak_suffix(&self.name) {
Some(suffix) => Ok(vec![suffix].into()),
None => missing_hash_attribute(vm, "HASHXOF", "_suffix"),
}
}
#[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 {
Self::new(&self.name, self.ctx.read().clone())
}
}
impl Representable for PyHasherXof {
fn repr_str(zelf: &Py<Self>, _vm: &VirtualMachine) -> PyResult<String> {
Ok(format!(
"<{} _hashlib.HASHXOF object @ {:#x}>",
zelf.name, zelf as *const _ as usize
))
}
}
#[pyfunction(name = "new")]
fn hashlib_new(args: NewHashArgs, vm: &VirtualMachine) -> PyResult<PyObjectRef> {
let data = resolve_data(args.data, args.string, vm)?;
match args.name.as_str().to_lowercase().as_str() {
"md5" => Ok(PyHasher::new("md5", HashWrapper::new::<Md5>(data)).into_pyobject(vm)),
"sha1" => Ok(PyHasher::new("sha1", HashWrapper::new::<Sha1>(data)).into_pyobject(vm)),
"sha224" => {
Ok(PyHasher::new("sha224", HashWrapper::new::<Sha224>(data)).into_pyobject(vm))
}
"sha256" => {
Ok(PyHasher::new("sha256", HashWrapper::new::<Sha256>(data)).into_pyobject(vm))
}
"sha384" => {
Ok(PyHasher::new("sha384", HashWrapper::new::<Sha384>(data)).into_pyobject(vm))
}
"sha512" => {
Ok(PyHasher::new("sha512", HashWrapper::new::<Sha512>(data)).into_pyobject(vm))
}
"sha3_224" => {
Ok(PyHasher::new("sha3_224", HashWrapper::new::<Sha3_224>(data)).into_pyobject(vm))
}
"sha3_256" => {
Ok(PyHasher::new("sha3_256", HashWrapper::new::<Sha3_256>(data)).into_pyobject(vm))
}
"sha3_384" => {
Ok(PyHasher::new("sha3_384", HashWrapper::new::<Sha3_384>(data)).into_pyobject(vm))
}
"sha3_512" => {
Ok(PyHasher::new("sha3_512", HashWrapper::new::<Sha3_512>(data)).into_pyobject(vm))
}
"shake_128" => Ok(
PyHasherXof::new("shake_128", HashXofWrapper::new_shake_128(data))
.into_pyobject(vm),
),
"shake_256" => Ok(
PyHasherXof::new("shake_256", HashXofWrapper::new_shake_256(data))
.into_pyobject(vm),
),
"blake2b" => Ok(
PyHasher::new("blake2b", HashWrapper::new::<Blake2b512>(data)).into_pyobject(vm),
),
"blake2s" => Ok(
PyHasher::new("blake2s", HashWrapper::new::<Blake2s256>(data)).into_pyobject(vm),
),
other => Err(vm.new_value_error(format!("Unknown hashing algorithm: {other}"))),
}
}
#[pyfunction(name = "openssl_md5")]
pub fn local_md5(args: HashArgs, vm: &VirtualMachine) -> PyResult<PyHasher> {
let data = resolve_data(args.data, args.string, vm)?;
Ok(PyHasher::new("md5", HashWrapper::new::<Md5>(data)))
}
#[pyfunction(name = "openssl_sha1")]
pub fn local_sha1(args: HashArgs, vm: &VirtualMachine) -> PyResult<PyHasher> {
let data = resolve_data(args.data, args.string, vm)?;
Ok(PyHasher::new("sha1", HashWrapper::new::<Sha1>(data)))
}
#[pyfunction(name = "openssl_sha224")]
pub fn local_sha224(args: HashArgs, vm: &VirtualMachine) -> PyResult<PyHasher> {
let data = resolve_data(args.data, args.string, vm)?;
Ok(PyHasher::new("sha224", HashWrapper::new::<Sha224>(data)))
}
#[pyfunction(name = "openssl_sha256")]
pub fn local_sha256(args: HashArgs, vm: &VirtualMachine) -> PyResult<PyHasher> {
let data = resolve_data(args.data, args.string, vm)?;
Ok(PyHasher::new("sha256", HashWrapper::new::<Sha256>(data)))
}
#[pyfunction(name = "openssl_sha384")]
pub fn local_sha384(args: HashArgs, vm: &VirtualMachine) -> PyResult<PyHasher> {
let data = resolve_data(args.data, args.string, vm)?;
Ok(PyHasher::new("sha384", HashWrapper::new::<Sha384>(data)))
}
#[pyfunction(name = "openssl_sha512")]
pub fn local_sha512(args: HashArgs, vm: &VirtualMachine) -> PyResult<PyHasher> {
let data = resolve_data(args.data, args.string, vm)?;
Ok(PyHasher::new("sha512", HashWrapper::new::<Sha512>(data)))
}
#[pyfunction(name = "openssl_sha3_224")]
pub fn local_sha3_224(args: HashArgs, vm: &VirtualMachine) -> PyResult<PyHasher> {
let data = resolve_data(args.data, args.string, vm)?;
Ok(PyHasher::new(
"sha3_224",
HashWrapper::new::<Sha3_224>(data),
))
}
#[pyfunction(name = "openssl_sha3_256")]
pub fn local_sha3_256(args: HashArgs, vm: &VirtualMachine) -> PyResult<PyHasher> {
let data = resolve_data(args.data, args.string, vm)?;
Ok(PyHasher::new(
"sha3_256",
HashWrapper::new::<Sha3_256>(data),
))
}
#[pyfunction(name = "openssl_sha3_384")]
pub fn local_sha3_384(args: HashArgs, vm: &VirtualMachine) -> PyResult<PyHasher> {
let data = resolve_data(args.data, args.string, vm)?;
Ok(PyHasher::new(
"sha3_384",
HashWrapper::new::<Sha3_384>(data),
))
}
#[pyfunction(name = "openssl_sha3_512")]
pub fn local_sha3_512(args: HashArgs, vm: &VirtualMachine) -> PyResult<PyHasher> {
let data = resolve_data(args.data, args.string, vm)?;
Ok(PyHasher::new(
"sha3_512",
HashWrapper::new::<Sha3_512>(data),
))
}
#[pyfunction(name = "openssl_shake_128")]
pub fn local_shake_128(args: HashArgs, vm: &VirtualMachine) -> PyResult<PyHasherXof> {
let data = resolve_data(args.data, args.string, vm)?;
Ok(PyHasherXof::new(
"shake_128",
HashXofWrapper::new_shake_128(data),
))
}
#[pyfunction(name = "openssl_shake_256")]
pub fn local_shake_256(args: HashArgs, vm: &VirtualMachine) -> PyResult<PyHasherXof> {
let data = resolve_data(args.data, args.string, vm)?;
Ok(PyHasherXof::new(
"shake_256",
HashXofWrapper::new_shake_256(data),
))
}
#[pyfunction(name = "openssl_blake2b")]
pub fn local_blake2b(args: BlakeHashArgs, vm: &VirtualMachine) -> PyResult<PyHasher> {
let data = resolve_data(args.data, args.string, vm)?;
Ok(PyHasher::new(
"blake2b",
HashWrapper::new::<Blake2b512>(data),
))
}
#[pyfunction(name = "openssl_blake2s")]
pub fn local_blake2s(args: BlakeHashArgs, vm: &VirtualMachine) -> PyResult<PyHasher> {
let data = resolve_data(args.data, args.string, vm)?;
Ok(PyHasher::new(
"blake2s",
HashWrapper::new::<Blake2s256>(data),
))
}
#[pyfunction]
fn get_fips_mode() -> i32 {
0
}
#[pyfunction]
fn compare_digest(
a: ArgStrOrBytesLike,
b: ArgStrOrBytesLike,
vm: &VirtualMachine,
) -> PyResult<bool> {
use constant_time_eq::constant_time_eq;
match (&a, &b) {
(ArgStrOrBytesLike::Str(a), ArgStrOrBytesLike::Str(b)) => {
if !a.isascii() || !b.isascii() {
return Err(vm.new_type_error(
"comparing strings with non-ASCII characters is not supported",
));
}
Ok(constant_time_eq(a.as_bytes(), b.as_bytes()))
}
(ArgStrOrBytesLike::Buf(a), ArgStrOrBytesLike::Buf(b)) => {
Ok(a.with_ref(|a| b.with_ref(|b| constant_time_eq(a, b))))
}
_ => Err(vm.new_type_error(format!(
"a bytes-like object is required, not '{}'",
b.as_object().class().name()
))),
}
}
#[derive(FromArgs, Debug)]
#[allow(unused)]
pub struct NewHMACHashArgs {
#[pyarg(positional)]
key: ArgBytesLike,
#[pyarg(any, optional)]
msg: OptionalArg<Option<ArgBytesLike>>,
#[pyarg(named, optional)]
digestmod: OptionalArg<PyObjectRef>,
}
#[pyfunction]
fn hmac_new(args: NewHMACHashArgs, vm: &VirtualMachine) -> PyResult<PyHmac> {
let digestmod = args
.digestmod
.into_option()
.ok_or_else(|| vm.new_type_error("Missing required parameter 'digestmod'."))?;
let name = resolve_digestmod(&digestmod, vm)?;
let key_buf = args.key.borrow_buf();
let msg_data = args.msg.flatten();
macro_rules! make_hmac {
($hash_ty:ty) => {{
let mut mac = <hmac::Hmac<$hash_ty> as Mac>::new_from_slice(&key_buf)
.map_err(|_| vm.new_value_error("invalid key length".to_owned()))?;
if let Some(ref m) = msg_data {
m.with_ref(|bytes| Mac::update(&mut mac, bytes));
}
Ok(PyHmac {
algo_name: name,
digest_size: <$hash_ty as OutputSizeUser>::output_size(),
block_size: <$hash_ty as BlockSizeUser>::block_size(),
ctx: PyRwLock::new(Box::new(TypedHmac(mac))),
})
}};
}
match name.as_str() {
"md5" => make_hmac!(Md5),
"sha1" => make_hmac!(Sha1),
"sha224" => make_hmac!(Sha224),
"sha256" => make_hmac!(Sha256),
"sha384" => make_hmac!(Sha384),
"sha512" => make_hmac!(Sha512),
"sha3_224" => make_hmac!(Sha3_224),
"sha3_256" => make_hmac!(Sha3_256),
"sha3_384" => make_hmac!(Sha3_384),
"sha3_512" => make_hmac!(Sha3_512),
_ => Err(unsupported_hash(&name, vm)),
}
}
#[pyfunction]
fn hmac_digest(args: HmacDigestArgs, vm: &VirtualMachine) -> PyResult<PyBytes> {
let name = resolve_digestmod(&args.digest, vm)?;
let key_buf = args.key.borrow_buf();
let msg_buf = args.msg.borrow_buf();
macro_rules! do_hmac {
($hash_ty:ty) => {{
let mut mac = <hmac::Hmac<$hash_ty> as Mac>::new_from_slice(&key_buf)
.map_err(|_| vm.new_value_error("invalid key length".to_owned()))?;
Mac::update(&mut mac, &msg_buf);
Ok(mac.finalize().into_bytes().to_vec().into())
}};
}
match name.as_str() {
"md5" => do_hmac!(Md5),
"sha1" => do_hmac!(Sha1),
"sha224" => do_hmac!(Sha224),
"sha256" => do_hmac!(Sha256),
"sha384" => do_hmac!(Sha384),
"sha512" => do_hmac!(Sha512),
"sha3_224" => do_hmac!(Sha3_224),
"sha3_256" => do_hmac!(Sha3_256),
"sha3_384" => do_hmac!(Sha3_384),
"sha3_512" => do_hmac!(Sha3_512),
_ => Err(unsupported_hash(&name, vm)),
}
}
#[pyfunction]
fn pbkdf2_hmac(args: Pbkdf2HmacArgs, vm: &VirtualMachine) -> PyResult<PyBytes> {
let name = args.hash_name.as_str().to_lowercase();
if args.iterations < 1 {
return Err(vm.new_value_error("iteration value must be greater than 0."));
}
let rounds = u32::try_from(args.iterations)
.map_err(|_| vm.new_overflow_error("iteration value is too great."))?;
let dklen: usize = match args.dklen.into_option() {
Some(obj) if vm.is_none(&obj) => {
hash_digest_size(&name).ok_or_else(|| unsupported_hash(&name, vm))?
}
Some(obj) => {
let len: i64 = obj.try_into_value(vm)?;
if len < 1 {
return Err(vm.new_value_error("key length must be greater than 0."));
}
usize::try_from(len)
.map_err(|_| vm.new_overflow_error("key length is too great."))?
}
None => hash_digest_size(&name).ok_or_else(|| unsupported_hash(&name, vm))?,
};
let password_buf = args.password.borrow_buf();
let salt_buf = args.salt.borrow_buf();
let mut dk = vec![0u8; dklen];
macro_rules! do_pbkdf2 {
($hash_ty:ty) => {{
pbkdf2::pbkdf2_hmac::<$hash_ty>(&password_buf, &salt_buf, rounds, &mut dk);
Ok(dk.into())
}};
}
match name.as_str() {
"md5" => do_pbkdf2!(Md5),
"sha1" => do_pbkdf2!(Sha1),
"sha224" => do_pbkdf2!(Sha224),
"sha256" => do_pbkdf2!(Sha256),
"sha384" => do_pbkdf2!(Sha384),
"sha512" => do_pbkdf2!(Sha512),
"sha3_224" => do_pbkdf2!(Sha3_224),
"sha3_256" => do_pbkdf2!(Sha3_256),
"sha3_384" => do_pbkdf2!(Sha3_384),
"sha3_512" => do_pbkdf2!(Sha3_512),
_ => Err(unsupported_hash(&name, vm)),
}
}
pub trait ThreadSafeDynDigest: DynClone + DynDigest + Sync + Send {}
impl<T> ThreadSafeDynDigest for T where T: DynClone + DynDigest + Sync + Send {}
clone_trait_object!(ThreadSafeDynDigest);
#[derive(Clone)]
pub struct HashWrapper {
block_size: usize,
inner: Box<dyn ThreadSafeDynDigest>,
}
impl HashWrapper {
pub fn new<D>(data: OptionalArg<ArgBytesLike>) -> Self
where
D: ThreadSafeDynDigest + BlockSizeUser + Default + 'static,
{
let mut h = Self {
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);
}
const 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)]
pub enum HashXofWrapper {
Shake128(Shake128),
Shake256(Shake256),
}
impl HashXofWrapper {
pub fn new_shake_128(data: OptionalArg<ArgBytesLike>) -> Self {
let mut h = Self::Shake128(Shake128::default());
if let OptionalArg::Present(d) = data {
d.with_ref(|bytes| h.update(bytes));
}
h
}
pub fn new_shake_256(data: OptionalArg<ArgBytesLike>) -> Self {
let mut h = Self::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 {
Self::Shake128(h) => h.update(data),
Self::Shake256(h) => h.update(data),
}
}
fn block_size(&self) -> usize {
match self {
Self::Shake128(_) => Shake128::block_size(),
Self::Shake256(_) => Shake256::block_size(),
}
}
fn finalize_xof(&self, length: usize) -> Vec<u8> {
match self {
Self::Shake128(h) => h.clone().finalize_boxed(length).into_vec(),
Self::Shake256(h) => h.clone().finalize_boxed(length).into_vec(),
}
}
}
}
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