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-rw-r--r--python/olm/group_session.py21
-rw-r--r--python/olm/pk.py15
-rw-r--r--python/olm/sas.py4
-rw-r--r--python/olm/session.py21
-rw-r--r--python/olm/utility.py1
-rw-r--r--python/tests/group_session_test.py17
-rw-r--r--python/tests/pk_test.py10
-rw-r--r--python/tests/session_test.py11
8 files changed, 81 insertions, 19 deletions
diff --git a/python/olm/group_session.py b/python/olm/group_session.py
index 737d9ef..88f87f0 100644
--- a/python/olm/group_session.py
+++ b/python/olm/group_session.py
@@ -33,7 +33,7 @@ from future.utils import bytes_to_native_str
# pylint: disable=no-name-in-module
from _libolm import ffi, lib # type: ignore
-from ._compat import URANDOM, to_bytearray, to_bytes
+from ._compat import URANDOM, to_bytearray, to_bytes, to_native_str
from ._finalize import track_for_finalization
@@ -176,8 +176,8 @@ class InboundGroupSession(object):
raise OlmGroupSessionError(last_error)
- def decrypt(self, ciphertext):
- # type: (AnyStr) -> Tuple[str, int]
+ def decrypt(self, ciphertext, errors="replace"):
+ # type: (AnyStr, str) -> Tuple[str, int]
"""Decrypt a message
Returns a tuple of the decrypted plain-text and the message index of
@@ -197,6 +197,13 @@ class InboundGroupSession(object):
Args:
ciphertext(str): Base64 encoded ciphertext containing the encrypted
message
+ unicode_errors(str, optional): The error handling scheme to use for
+ unicode decoding errors. The default is "replace" meaning that
+ the character that was unable to decode will be replaced with
+ the unicode replacement character (U+FFFD). Other possible
+ values are "strict", "ignore" and "xmlcharrefreplace" as well
+ as any other name registered with codecs.register_error that
+ can handle UnicodeEncodeErrors.
"""
if not ciphertext:
raise ValueError("Ciphertext can't be empty.")
@@ -223,10 +230,10 @@ class InboundGroupSession(object):
self._check_error(plaintext_length)
- plaintext = bytes_to_native_str(ffi.unpack(
- plaintext_buffer,
- plaintext_length
- ))
+ plaintext = to_native_str(
+ ffi.unpack(plaintext_buffer, plaintext_length),
+ errors=errors
+ )
# clear out copies of the plaintext
lib.memset(plaintext_buffer, 0, max_plaintext_length)
diff --git a/python/olm/pk.py b/python/olm/pk.py
index 193aba5..158c78d 100644
--- a/python/olm/pk.py
+++ b/python/olm/pk.py
@@ -40,7 +40,7 @@ from future.utils import bytes_to_native_str
from _libolm import ffi, lib # type: ignore
-from ._compat import URANDOM, to_bytearray
+from ._compat import URANDOM, to_bytearray, to_native_str
from ._finalize import track_for_finalization
@@ -313,8 +313,8 @@ class PkDecryption(object):
return obj
- def decrypt(self, message):
- # type (PkMessage) -> str
+ def decrypt(self, message, errors="replace"):
+ # type (PkMessage, str) -> str
"""Decrypt a previously encrypted Pk message.
Returns the decrypted plaintext.
@@ -322,6 +322,13 @@ class PkDecryption(object):
Args:
message(PkMessage): the pk message to decrypt.
+ unicode_errors(str, optional): The error handling scheme to use for
+ unicode decoding errors. The default is "replace" meaning that
+ the character that was unable to decode will be replaced with
+ the unicode replacement character (U+FFFD). Other possible
+ values are "strict", "ignore" and "xmlcharrefreplace" as well
+ as any other name registered with codecs.register_error that
+ can handle UnicodeEncodeErrors.
"""
ephemeral_key = to_bytearray(message.ephemeral_key)
ephemeral_key_size = len(ephemeral_key)
@@ -354,7 +361,7 @@ class PkDecryption(object):
# clear out copies of the plaintext
lib.memset(plaintext_buffer, 0, max_plaintext_length)
- return bytes_to_native_str(plaintext)
+ return to_native_str(plaintext, errors=errors)
def _clear_pk_signing(pk_struct):
diff --git a/python/olm/sas.py b/python/olm/sas.py
index c12b7bc..bea1dd0 100644
--- a/python/olm/sas.py
+++ b/python/olm/sas.py
@@ -30,15 +30,15 @@ Examples:
"""
-from functools import wraps
from builtins import bytes
+from functools import wraps
from typing import Optional
from future.utils import bytes_to_native_str
from _libolm import ffi, lib
-from ._compat import URANDOM, to_bytes, to_bytearray
+from ._compat import URANDOM, to_bytearray, to_bytes
from ._finalize import track_for_finalization
diff --git a/python/olm/session.py b/python/olm/session.py
index cba9be0..cf66582 100644
--- a/python/olm/session.py
+++ b/python/olm/session.py
@@ -40,7 +40,7 @@ from future.utils import bytes_to_native_str
# pylint: disable=no-name-in-module
from _libolm import ffi, lib # type: ignore
-from ._compat import URANDOM, to_bytearray, to_bytes
+from ._compat import URANDOM, to_bytearray, to_bytes, to_native_str
from ._finalize import track_for_finalization
# This is imported only for type checking purposes
@@ -273,8 +273,8 @@ class Session(object):
else: # pragma: no cover
raise ValueError("Unknown message type")
- def decrypt(self, message):
- # type: (_OlmMessage) -> str
+ def decrypt(self, message, errors="replace"):
+ # type: (_OlmMessage, str) -> str
"""Decrypts a message using the session. Returns the plaintext string
on success. Raises OlmSessionError on failure. If the base64 couldn't
be decoded then the error message will be "INVALID_BASE64". If the
@@ -285,7 +285,14 @@ class Session(object):
Args:
message(OlmMessage): The Olm message that will be decrypted. It can
- be either an OlmPreKeyMessage or an OlmMessage.
+ be either an OlmPreKeyMessage or an OlmMessage.
+ unicode_errors(str, optional): The error handling scheme to use for
+ unicode decoding errors. The default is "replace" meaning that
+ the character that was unable to decode will be replaced with
+ the unicode replacement character (U+FFFD). Other possible
+ values are "strict", "ignore" and "xmlcharrefreplace" as well
+ as any other name registered with codecs.register_error that
+ can handle UnicodeEncodeErrors.
"""
if not message.ciphertext:
raise ValueError("Ciphertext can't be empty")
@@ -311,8 +318,10 @@ class Session(object):
plaintext_buffer, max_plaintext_length
)
self._check_error(plaintext_length)
- plaintext = bytes_to_native_str(
- ffi.unpack(plaintext_buffer, plaintext_length))
+ plaintext = to_native_str(
+ ffi.unpack(plaintext_buffer, plaintext_length),
+ errors=errors
+ )
# clear out copies of the plaintext
lib.memset(plaintext_buffer, 0, max_plaintext_length)
diff --git a/python/olm/utility.py b/python/olm/utility.py
index 10d5ab4..bddef38 100644
--- a/python/olm/utility.py
+++ b/python/olm/utility.py
@@ -32,6 +32,7 @@ Examples:
# pylint: disable=redefined-builtin,unused-import
from typing import AnyStr, Type
+
from future.utils import bytes_to_native_str
# pylint: disable=no-name-in-module
diff --git a/python/tests/group_session_test.py b/python/tests/group_session_test.py
index c17e84f..3942024 100644
--- a/python/tests/group_session_test.py
+++ b/python/tests/group_session_test.py
@@ -1,3 +1,7 @@
+# -*- coding: utf-8 -*-
+
+from builtins import bytes
+
import pytest
from olm import InboundGroupSession, OlmGroupSessionError, OutboundGroupSession
@@ -112,3 +116,16 @@ class TestClass(object):
outbound = OutboundGroupSession()
inbound = InboundGroupSession(outbound.session_key)
del inbound
+
+ def test_invalid_unicode_decrypt(self):
+ outbound = OutboundGroupSession()
+ inbound = InboundGroupSession(outbound.session_key)
+
+ text = outbound.encrypt(bytes([0xed]))
+ plaintext, _ = inbound.decrypt(text)
+
+ print(plaintext)
+ assert plaintext == "�"
+
+ plaintext, _ = inbound.decrypt(text, "ignore")
+ assert plaintext == ""
diff --git a/python/tests/pk_test.py b/python/tests/pk_test.py
index fe3b4b6..749d2eb 100644
--- a/python/tests/pk_test.py
+++ b/python/tests/pk_test.py
@@ -1,3 +1,6 @@
+# -*- coding: utf-8 -*-
+from builtins import bytes
+
import pytest
from olm import (PkDecryption, PkDecryptionError, PkEncryption, PkSigning,
@@ -55,3 +58,10 @@ class TestClass(object):
message = "This statement is true"
signature = signing.sign(message)
ed25519_verify(signing.public_key, message, signature)
+
+ def test_invalid_unicode_decrypt(self):
+ decryption = PkDecryption()
+ encryption = PkEncryption(decryption.public_key)
+ message = encryption.encrypt(bytes([0xed]))
+ plaintext = decryption.decrypt(message)
+ assert plaintext == "�"
diff --git a/python/tests/session_test.py b/python/tests/session_test.py
index ab1c38b..56a6b83 100644
--- a/python/tests/session_test.py
+++ b/python/tests/session_test.py
@@ -1,3 +1,6 @@
+# -*- coding: utf-8 -*-
+from builtins import bytes
+
import pytest
from olm import (Account, InboundSession, OlmMessage, OlmPreKeyMessage,
@@ -141,3 +144,11 @@ class TestClass(object):
new_message = new_session.encrypt(plaintext)
assert bob_session.matches(new_message) is False
+
+ def test_invalid_unicode_decrypt(self):
+ alice, bob, session = self._create_session()
+ message = session.encrypt(bytes([0xed]))
+
+ bob_session = InboundSession(bob, message)
+ plaintext = bob_session.decrypt(message)
+ assert plaintext == "�"
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-17 08:08:12 +0000