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Merged
alex merged 15 commits into from
Nov 3, 2025
Merged

Support for copy.deepcopy keys #13759

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7417a8e
fix: add deep copy for rsa keys
Courtcircuits Oct 28, 2025
087b6f1
fix: add deep copy for dh keys
Courtcircuits Oct 29, 2025
de8775e
fix: add deep copy for ec keys
Courtcircuits Oct 29, 2025
1f952b5
fix: add deep copy for ed25519 keys
Courtcircuits Oct 29, 2025
0c86c73
fix: add deep copy for ed448 keys
Courtcircuits Oct 29, 2025
9659cf9
fix: add deep copy for x25519 keys
Courtcircuits Oct 29, 2025
0d652a5
fix: add deep copy for x448 keys
Courtcircuits Oct 29, 2025
29630e2
fix: forgot skip test when x448 not available
Courtcircuits Oct 29, 2025
1e25239
chore: removed __eq__ from dsa because unrelated + fmt on x448 + adde…
Courtcircuits Oct 30, 2025
828c95a
fix: replaced all deepcopy implementations by self
Courtcircuits Oct 30, 2025
71abca4
fix: modified tests for coverage
Courtcircuits Oct 30, 2025
4bbab09
chore: format test x448
Courtcircuits Oct 30, 2025
f1fea09
chore: removed cast for key in test_ec
Courtcircuits Oct 30, 2025
b830922
chore: replaced key generation in tests by pre generated keys
Courtcircuits Nov 3, 2025
7fa39b8
chore: replaced PyDict by PyAny in backend files for deepcopy
Courtcircuits Nov 3, 2025
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3 changes: 3 additions & 0 deletions docs/hazmat/primitives/asymmetric/cloudhsm.rst
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Expand Up @@ -122,6 +122,9 @@ if you only need a subset of functionality.
... def __copy__(self) -> "CloudRSAPrivateKey":
... return self
...
... def __deepcopy__(self, memodict: dict) -> "CloudRSAPrivateKey":
... return self
...
>>> cloud_private_key = CloudRSAPrivateKey("creds", "key_id")
>>> sig = cloud_private_key.sign(b"message", PKCS1v15(), hashes.SHA256())
>>> isinstance(sig, bytes)
Expand Down
12 changes: 12 additions & 0 deletions src/cryptography/hazmat/primitives/asymmetric/dh.py
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Expand Up @@ -87,6 +87,12 @@ def __copy__(self) -> DHPublicKey:
Returns a copy.
"""

@abc.abstractmethod
def __deepcopy__(self) -> DHPublicKey:
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@joakimnordling joakimnordling Nov 3, 2025

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Isn't the __deepcopy__ expected to take in the memo as a second parameter as described on https://docs.python.org/3/library/copy.html#object.__deepcopy__ ?

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@alex alex Nov 3, 2025

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oof yes, not sure how I missed this. Will send a fix.

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@joakimnordling joakimnordling Nov 3, 2025

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In case you missed it, the version in docs/hazmat/primitives/asymmetric/cloudhsm.rst has a memodict (not sure if anything cares about if it has that name of memo, but I'd at least change it to match the name in the documentation. And also note that the parameter is missing in not just this one I commented on, but all the *.py files.

"""
Returns a deep copy.
"""


DHPublicKeyWithSerialization = DHPublicKey
DHPublicKey.register(rust_openssl.dh.DHPublicKey)
Expand Down Expand Up @@ -142,6 +148,12 @@ def __copy__(self) -> DHPrivateKey:
Returns a copy.
"""

@abc.abstractmethod
def __deepcopy__(self) -> DHPrivateKey:
"""
Returns a deep copy.
"""


DHPrivateKeyWithSerialization = DHPrivateKey
DHPrivateKey.register(rust_openssl.dh.DHPrivateKey)
12 changes: 12 additions & 0 deletions src/cryptography/hazmat/primitives/asymmetric/dsa.py
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Expand Up @@ -84,6 +84,12 @@ def __copy__(self) -> DSAPrivateKey:
Returns a copy.
"""

@abc.abstractmethod
def __deepcopy__(self) -> DSAPrivateKey:
"""
Returns a deep copy.
"""


DSAPrivateKeyWithSerialization = DSAPrivateKey
DSAPrivateKey.register(rust_openssl.dsa.DSAPrivateKey)
Expand Down Expand Up @@ -142,6 +148,12 @@ def __copy__(self) -> DSAPublicKey:
Returns a copy.
"""

@abc.abstractmethod
def __deepcopy__(self) -> DSAPublicKey:
"""
Returns a deep copy.
"""


DSAPublicKeyWithSerialization = DSAPublicKey
DSAPublicKey.register(rust_openssl.dsa.DSAPublicKey)
Expand Down
12 changes: 12 additions & 0 deletions src/cryptography/hazmat/primitives/asymmetric/ec.py
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Expand Up @@ -134,6 +134,12 @@ def __copy__(self) -> EllipticCurvePrivateKey:
Returns a copy.
"""

@abc.abstractmethod
def __deepcopy__(self) -> EllipticCurvePrivateKey:
"""
Returns a deep copy.
"""


EllipticCurvePrivateKeyWithSerialization = EllipticCurvePrivateKey
EllipticCurvePrivateKey.register(rust_openssl.ec.ECPrivateKey)
Expand Down Expand Up @@ -207,6 +213,12 @@ def __copy__(self) -> EllipticCurvePublicKey:
Returns a copy.
"""

@abc.abstractmethod
def __deepcopy__(self) -> EllipticCurvePublicKey:
"""
Returns a deep copy.
"""


EllipticCurvePublicKeyWithSerialization = EllipticCurvePublicKey
EllipticCurvePublicKey.register(rust_openssl.ec.ECPublicKey)
Expand Down
12 changes: 12 additions & 0 deletions src/cryptography/hazmat/primitives/asymmetric/ed25519.py
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Expand Up @@ -60,6 +60,12 @@ def __copy__(self) -> Ed25519PublicKey:
Returns a copy.
"""

@abc.abstractmethod
def __deepcopy__(self) -> Ed25519PublicKey:
"""
Returns a deep copy.
"""


Ed25519PublicKey.register(rust_openssl.ed25519.Ed25519PublicKey)

Expand Down Expand Up @@ -125,5 +131,11 @@ def __copy__(self) -> Ed25519PrivateKey:
Returns a copy.
"""

@abc.abstractmethod
def __deepcopy__(self) -> Ed25519PrivateKey:
"""
Returns a deep copy.
"""


Ed25519PrivateKey.register(rust_openssl.ed25519.Ed25519PrivateKey)
12 changes: 12 additions & 0 deletions src/cryptography/hazmat/primitives/asymmetric/ed448.py
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Expand Up @@ -60,6 +60,12 @@ def __copy__(self) -> Ed448PublicKey:
Returns a copy.
"""

@abc.abstractmethod
def __deepcopy__(self) -> Ed448PublicKey:
"""
Returns a deep copy.
"""


if hasattr(rust_openssl, "ed448"):
Ed448PublicKey.register(rust_openssl.ed448.Ed448PublicKey)
Expand Down Expand Up @@ -126,6 +132,12 @@ def __copy__(self) -> Ed448PrivateKey:
Returns a copy.
"""

@abc.abstractmethod
def __deepcopy__(self) -> Ed448PrivateKey:
"""
Returns a deep copy.
"""


if hasattr(rust_openssl, "x448"):
Ed448PrivateKey.register(rust_openssl.ed448.Ed448PrivateKey)
12 changes: 12 additions & 0 deletions src/cryptography/hazmat/primitives/asymmetric/rsa.py
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Expand Up @@ -69,6 +69,12 @@ def __copy__(self) -> RSAPrivateKey:
Returns a copy.
"""

@abc.abstractmethod
def __deepcopy__(self) -> RSAPrivateKey:
"""
Returns a deep copy.
"""


RSAPrivateKeyWithSerialization = RSAPrivateKey
RSAPrivateKey.register(rust_openssl.rsa.RSAPrivateKey)
Expand Down Expand Up @@ -139,6 +145,12 @@ def __copy__(self) -> RSAPublicKey:
Returns a copy.
"""

@abc.abstractmethod
def __deepcopy__(self) -> RSAPublicKey:
"""
Returns a deep copy.
"""


RSAPublicKeyWithSerialization = RSAPublicKey
RSAPublicKey.register(rust_openssl.rsa.RSAPublicKey)
Expand Down
12 changes: 12 additions & 0 deletions src/cryptography/hazmat/primitives/asymmetric/x25519.py
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Expand Up @@ -54,6 +54,12 @@ def __copy__(self) -> X25519PublicKey:
Returns a copy.
"""

@abc.abstractmethod
def __deepcopy__(self) -> X25519PublicKey:
"""
Returns a deep copy.
"""


X25519PublicKey.register(rust_openssl.x25519.X25519PublicKey)

Expand Down Expand Up @@ -118,5 +124,11 @@ def __copy__(self) -> X25519PrivateKey:
Returns a copy.
"""

@abc.abstractmethod
def __deepcopy__(self) -> X25519PrivateKey:
"""
Returns a deep copy.
"""


X25519PrivateKey.register(rust_openssl.x25519.X25519PrivateKey)
12 changes: 12 additions & 0 deletions src/cryptography/hazmat/primitives/asymmetric/x448.py
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Expand Up @@ -54,6 +54,12 @@ def __copy__(self) -> X448PublicKey:
Returns a copy.
"""

@abc.abstractmethod
def __deepcopy__(self) -> X448PublicKey:
"""
Returns a deep copy.
"""


if hasattr(rust_openssl, "x448"):
X448PublicKey.register(rust_openssl.x448.X448PublicKey)
Expand Down Expand Up @@ -120,6 +126,12 @@ def __copy__(self) -> X448PrivateKey:
Returns a copy.
"""

@abc.abstractmethod
def __deepcopy__(self) -> X448PrivateKey:
"""
Returns a deep copy.
"""


if hasattr(rust_openssl, "x448"):
X448PrivateKey.register(rust_openssl.x448.X448PrivateKey)
14 changes: 14 additions & 0 deletions src/rust/src/backend/dh.rs
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Expand Up @@ -247,6 +247,13 @@ impl DHPrivateKey {
fn __copy__(slf: pyo3::PyRef<'_, Self>) -> pyo3::PyRef<'_, Self> {
slf
}

fn __deepcopy__<'p>(
slf: pyo3::PyRef<'p, Self>,
_memo: &pyo3::Bound<'p, pyo3::PyAny>,
) -> pyo3::PyRef<'p, Self> {
slf
}
}

#[pyo3::pymethods]
Expand Down Expand Up @@ -312,6 +319,13 @@ impl DHPublicKey {
fn __copy__(slf: pyo3::PyRef<'_, Self>) -> pyo3::PyRef<'_, Self> {
slf
}

fn __deepcopy__<'p>(
slf: pyo3::PyRef<'p, Self>,
_memo: &pyo3::Bound<'p, pyo3::types::PyAny>,
) -> pyo3::PyRef<'p, Self> {
slf
}
}

#[pyo3::pymethods]
Expand Down
14 changes: 14 additions & 0 deletions src/rust/src/backend/dsa.rs
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Expand Up @@ -156,6 +156,13 @@ impl DsaPrivateKey {
fn __copy__(slf: pyo3::PyRef<'_, Self>) -> pyo3::PyRef<'_, Self> {
slf
}

fn __deepcopy__<'p>(
slf: pyo3::PyRef<'p, Self>,
_memo: &pyo3::Bound<'p, pyo3::PyAny>,
) -> pyo3::PyRef<'p, Self> {
slf
}
}

#[pyo3::pymethods]
Expand Down Expand Up @@ -229,6 +236,13 @@ impl DsaPublicKey {
fn __copy__(slf: pyo3::PyRef<'_, Self>) -> pyo3::PyRef<'_, Self> {
slf
}

fn __deepcopy__<'p>(
slf: pyo3::PyRef<'p, Self>,
_memo: &pyo3::Bound<'p, pyo3::PyAny>,
) -> pyo3::PyRef<'p, Self> {
slf
}
}

#[pyo3::pymethods]
Expand Down
14 changes: 14 additions & 0 deletions src/rust/src/backend/ec.rs
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Expand Up @@ -373,6 +373,13 @@ impl ECPrivateKey {
fn __copy__(slf: pyo3::PyRef<'_, Self>) -> pyo3::PyRef<'_, Self> {
slf
}

fn __deepcopy__<'p>(
slf: pyo3::PyRef<'p, Self>,
_memo: &pyo3::Bound<'p, pyo3::PyAny>,
) -> pyo3::PyRef<'p, Self> {
slf
}
}

#[pyo3::pymethods]
Expand Down Expand Up @@ -458,6 +465,13 @@ impl ECPublicKey {
fn __copy__(slf: pyo3::PyRef<'_, Self>) -> pyo3::PyRef<'_, Self> {
slf
}

fn __deepcopy__<'p>(
slf: pyo3::PyRef<'p, Self>,
_memo: &pyo3::Bound<'p, pyo3::PyAny>,
) -> pyo3::PyRef<'p, Self> {
slf
}
}

#[pyo3::pyclass(frozen, module = "cryptography.hazmat.primitives.asymmetric.ec")]
Expand Down
14 changes: 14 additions & 0 deletions src/rust/src/backend/ed25519.rs
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Expand Up @@ -119,6 +119,13 @@ impl Ed25519PrivateKey {
fn __copy__(slf: pyo3::PyRef<'_, Self>) -> pyo3::PyRef<'_, Self> {
slf
}

fn __deepcopy__<'p>(
slf: pyo3::PyRef<'p, Self>,
_memo: &pyo3::Bound<'p, pyo3::PyAny>,
) -> pyo3::PyRef<'p, Self> {
slf
}
}

#[pyo3::pymethods]
Expand Down Expand Up @@ -161,6 +168,13 @@ impl Ed25519PublicKey {
fn __copy__(slf: pyo3::PyRef<'_, Self>) -> pyo3::PyRef<'_, Self> {
slf
}

fn __deepcopy__<'p>(
slf: pyo3::PyRef<'p, Self>,
_memo: &pyo3::Bound<'p, pyo3::PyAny>,
) -> pyo3::PyRef<'p, Self> {
slf
}
}

#[pyo3::pymodule(gil_used = false)]
Expand Down
14 changes: 14 additions & 0 deletions src/rust/src/backend/ed448.rs
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Expand Up @@ -117,6 +117,13 @@ impl Ed448PrivateKey {
fn __copy__(slf: pyo3::PyRef<'_, Self>) -> pyo3::PyRef<'_, Self> {
slf
}

fn __deepcopy__<'p>(
slf: pyo3::PyRef<'p, Self>,
_memo: &pyo3::Bound<'p, pyo3::PyAny>,
) -> pyo3::PyRef<'p, Self> {
slf
}
}

#[pyo3::pymethods]
Expand Down Expand Up @@ -158,6 +165,13 @@ impl Ed448PublicKey {
fn __copy__(slf: pyo3::PyRef<'_, Self>) -> pyo3::PyRef<'_, Self> {
slf
}

fn __deepcopy__<'p>(
slf: pyo3::PyRef<'p, Self>,
_memo: &pyo3::Bound<'p, pyo3::PyAny>,
) -> pyo3::PyRef<'p, Self> {
slf
}
}

#[pyo3::pymodule(gil_used = false)]
Expand Down
14 changes: 14 additions & 0 deletions src/rust/src/backend/rsa.rs
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Expand Up @@ -422,6 +422,13 @@ impl RsaPrivateKey {
fn __copy__(slf: pyo3::PyRef<'_, Self>) -> pyo3::PyRef<'_, Self> {
slf
}

fn __deepcopy__<'p>(
slf: pyo3::PyRef<'p, Self>,
_memo: &pyo3::Bound<'p, pyo3::PyAny>,
) -> pyo3::PyRef<'p, Self> {
slf
}
}

#[pyo3::pymethods]
Expand Down Expand Up @@ -535,6 +542,13 @@ impl RsaPublicKey {
fn __copy__(slf: pyo3::PyRef<'_, Self>) -> pyo3::PyRef<'_, Self> {
slf
}

fn __deepcopy__<'p>(
slf: pyo3::PyRef<'p, Self>,
_memo: &pyo3::Bound<'p, pyo3::PyAny>,
) -> pyo3::PyRef<'p, Self> {
slf
}
}

#[pyo3::pyclass(
Expand Down
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