33 lines
1.5 KiB
Diff
33 lines
1.5 KiB
Diff
Index: cryptography-3.3.2/src/cryptography/hazmat/backends/openssl/ciphers.py
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===================================================================
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--- cryptography-3.3.2.orig/src/cryptography/hazmat/backends/openssl/ciphers.py
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+++ cryptography-3.3.2/src/cryptography/hazmat/backends/openssl/ciphers.py
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@@ -135,7 +135,7 @@ class _CipherContext(object):
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data_processed = 0
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total_out = 0
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outlen = self._backend._ffi.new("int *")
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- baseoutbuf = self._backend._ffi.from_buffer(buf)
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+ baseoutbuf = self._backend._ffi.from_buffer(buf, require_writable=True)
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baseinbuf = self._backend._ffi.from_buffer(data)
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while data_processed != total_data_len:
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Index: cryptography-3.3.2/tests/hazmat/primitives/test_ciphers.py
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===================================================================
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--- cryptography-3.3.2.orig/tests/hazmat/primitives/test_ciphers.py
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+++ cryptography-3.3.2/tests/hazmat/primitives/test_ciphers.py
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@@ -235,6 +235,14 @@ class TestCipherUpdateInto(object):
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assert res == len(pt)
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assert bytes(buf)[:res] == ct
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+ def test_update_into_immutable(self, backend):
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+ key = b"\x00" * 16
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+ c = ciphers.Cipher(AES(key), modes.ECB(), backend)
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+ encryptor = c.encryptor()
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+ buf = b"\x00" * 32
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+ with pytest.raises((TypeError, BufferError)):
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+ encryptor.update_into(b"testing", buf)
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+
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@pytest.mark.supported(
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only_if=lambda backend: backend.cipher_supported(
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AES(b"\x00" * 16), modes.GCM(b"0" * 12)
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