Support NoDigestInfo in recover_data_from_signature

Author: jahkosha

src/cryptography/hazmat/primitives/asymmetric/rsa.py

@@ -123,7 +123,7 @@ def recover_data_from_signature(
         self,
         signature: bytes,
         padding: AsymmetricPadding,
-        algorithm: hashes.HashAlgorithm | None,
+        algorithm: hashes.HashAlgorithm | asym_utils.NoDigestInfo | None,
     ) -> bytes:
         """
         Recovers the original data from the signature.

src/rust/src/backend/rsa.rs

@@ -497,6 +497,11 @@ impl RsaPublicKey {
         padding: &pyo3::Bound<'_, pyo3::PyAny>,
         algorithm: &pyo3::Bound<'_, pyo3::PyAny>,
     ) -> CryptographyResult<pyo3::Bound<'p, pyo3::types::PyBytes>> {
+        let algorithm = if algorithm.is_instance(&types::NO_DIGEST_INFO.get(py)?)? {
+            &pyo3::types::PyNone::get(py).to_owned().into_any()
+        } else {
+            algorithm
+        };
         if algorithm.is_instance(&types::PREHASHED.get(py)?)? {
             return Err(CryptographyError::from(
                 pyo3::exceptions::PyTypeError::new_err(

tests/hazmat/primitives/test_rsa.py

@@ -955,7 +955,7 @@ def test_pkcs1v15_verification(self, backend, subtests):
                 # Test recovery of all data (full DigestInfo) with hash alg. as
                 # None
                 rec_sig_data = public_key.recover_data_from_signature(
-                    signature, padding.PKCS1v15(), None
+                    signature, padding.PKCS1v15(), asym_utils.NoDigestInfo()
                 )
                 assert len(rec_sig_data) > len(msg_digest)
                 assert msg_digest == rec_sig_data[-len(msg_digest) :]