1 files changed, 73 insertions, 0 deletions
diff --git a/dev-python/tpm2-pytss/files/tpm2-pytss-2.1.0-internal-crypto-fix-_MyRSAPrivateNumbers-with-crypto.patch b/dev-python/tpm2-pytss/files/tpm2-pytss-2.1.0-internal-crypto-fix-_MyRSAPrivateNumbers-with-crypto.patch
new file mode 100644
index 000000000000..4aaecd935c22
--- /dev/null
+++ b/dev-python/tpm2-pytss/files/tpm2-pytss-2.1.0-internal-crypto-fix-_MyRSAPrivateNumbers-with-crypto.patch
@@ -0,0 +1,73 @@
+From 0fbb9d099370c0a7031dd13990986538f586836a Mon Sep 17 00:00:00 2001
+From: Erik Larsson <who+github@cnackers.org>
+Date: Fri, 26 Jan 2024 12:01:41 +0100
+Subject: [PATCH 3/3] internal/crypto: fix _MyRSAPrivateNumbers with
+ cryptograpy >= 42.0.1
+
+RSAPrivateNumbers was moved to a rust implementation in 42.0.1.
+So inheritance is no longer possible, so turn the class into a
+wrapper instead of a subclass.
+
+Fixes #561
+
+Signed-off-by: Erik Larsson <who+github@cnackers.org>
+---
+ src/tpm2_pytss/internal/crypto.py | 21 +++++++++------------
+ 1 file changed, 9 insertions(+), 12 deletions(-)
+
+diff --git a/src/tpm2_pytss/internal/crypto.py b/src/tpm2_pytss/internal/crypto.py
+index 93e5181..42030c5 100644
+--- a/src/tpm2_pytss/internal/crypto.py
++++ b/src/tpm2_pytss/internal/crypto.py
+@@ -23,7 +23,7 @@ from cryptography.hazmat.primitives.ciphers.algorithms import AES, Camellia
+ from cryptography.hazmat.primitives.ciphers import modes, Cipher, CipherAlgorithm
+ from cryptography.hazmat.backends import default_backend
+ from cryptography.exceptions import UnsupportedAlgorithm, InvalidSignature
+-from typing import Tuple, Type
++from typing import Tuple, Type, Any
+ import secrets
+ import sys
+ 
+@@ -220,7 +220,7 @@ def public_to_key(obj):
+     return key
+ 
+ 
+-class _MyRSAPrivateNumbers(rsa.RSAPrivateNumbers):
++class _MyRSAPrivateNumbers:
+     def __init__(self, p: int, n: int, e: int, pubnums: rsa.RSAPublicNumbers):
+ 
+         q = n // p
+@@ -231,7 +231,12 @@ class _MyRSAPrivateNumbers(rsa.RSAPrivateNumbers):
+         dmq1 = rsa.rsa_crt_dmq1(d, q)
+         iqmp = rsa.rsa_crt_iqmp(p, q)
+ 
+-        super().__init__(p, q, d, dmp1, dmq1, iqmp, pubnums)
++        self._private_numbers = rsa.RSAPrivateNumbers(
++            p, q, d, dmp1, dmq1, iqmp, pubnums
++        )
++
++    def private_key(self, *args: Any, **kwargs: Any) -> rsa.RSAPrivateKey:
++        return self._private_numbers.private_key(*args, **kwargs)
+ 
+     @staticmethod
+     def _xgcd(a: int, b: int) -> Tuple[int, int, int]:
+@@ -251,15 +256,7 @@ class _MyRSAPrivateNumbers(rsa.RSAPrivateNumbers):
+     #
+     @staticmethod
+     def _modinv(a, m):
+-
+-        if sys.version_info < (3, 8):
+-            g, x, y = _MyRSAPrivateNumbers._xgcd(a, m)
+-            if g != 1:
+-                raise Exception("modular inverse does not exist")
+-            else:
+-                return x % m
+-        else:
+-            return pow(a, -1, m)
++        return pow(a, -1, m)
+ 
+     @staticmethod
+     def _generate_d(p, q, e, n):
+-- 
+2.43.0
+