From e545ad7eaf55ac8b7dc7d37c046c541e35cef542 Mon Sep 17 00:00:00 2001 From: Richard van der Hoff Date: Tue, 17 May 2016 18:55:39 +0100 Subject: Outbound group session support in the python wrappers --- python/olm/outbound_group_session.py | 83 ++++++++++++++++++++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 python/olm/outbound_group_session.py (limited to 'python/olm/outbound_group_session.py') diff --git a/python/olm/outbound_group_session.py b/python/olm/outbound_group_session.py new file mode 100644 index 0000000..6182647 --- /dev/null +++ b/python/olm/outbound_group_session.py @@ -0,0 +1,83 @@ +import json + +from ._base import * + +lib.olm_outbound_group_session_size.argtypes = [] +lib.olm_outbound_group_session_size.restype = c_size_t + +lib.olm_outbound_group_session.argtypes = [c_void_p] +lib.olm_outbound_group_session.restype = c_void_p + +lib.olm_outbound_group_session_last_error.argtypes = [c_void_p] +lib.olm_outbound_group_session_last_error.restype = c_char_p + +def outbound_group_session_errcheck(res, func, args): + if res == ERR: + raise OlmError("%s: %s" % ( + func.__name__, lib.olm_outbound_group_session_last_error(args[0]) + )) + return res + + +def outbound_group_session_function(func, *types): + func.argtypes = (c_void_p,) + types + func.restypes = c_size_t + func.errcheck = outbound_group_session_errcheck + + +outbound_group_session_function( + lib.olm_pickle_outbound_group_session, c_void_p, c_size_t, c_void_p, c_size_t +) +outbound_group_session_function( + lib.olm_unpickle_outbound_group_session, c_void_p, c_size_t, c_void_p, c_size_t +) + +outbound_group_session_function(lib.olm_init_outbound_group_session_random_length) +outbound_group_session_function(lib.olm_init_outbound_group_session, c_void_p, c_size_t) +outbound_group_session_function(lib.olm_group_encrypt_message_length, c_size_t) +outbound_group_session_function(lib.olm_group_encrypt, + c_void_p, c_size_t, # Plaintext + c_void_p, c_size_t, # Message +) + + +class OutboundGroupSession(object): + def __init__(self): + self.buf = create_string_buffer(lib.olm_outbound_group_session_size()) + self.ptr = lib.olm_outbound_group_session(self.buf) + + random_length = lib.olm_init_outbound_group_session_random_length(self.ptr) + random = read_random(random_length) + random_buffer = create_string_buffer(random) + lib.olm_init_outbound_group_session(self.ptr, random_buffer, random_length) + + def pickle(self, key): + key_buffer = create_string_buffer(key) + pickle_length = lib.olm_pickle_outbound_group_session_length(self.ptr) + pickle_buffer = create_string_buffer(pickle_length) + lib.olm_pickle_outbound_group_session( + self.ptr, key_buffer, len(key), pickle_buffer, pickle_length + ) + return pickle_buffer.raw + + def unpickle(self, key, pickle): + key_buffer = create_string_buffer(key) + pickle_buffer = create_string_buffer(pickle) + lib.olm_unpickle_outbound_group_session( + self.ptr, key_buffer, len(key), pickle_buffer, len(pickle) + ) + + def encrypt(self, plaintext): + message_length = lib.olm_group_encrypt_message_length( + self.ptr, len(plaintext) + ) + message_buffer = create_string_buffer(message_length) + + plaintext_buffer = create_string_buffer(plaintext) + + lib.olm_group_encrypt( + self.ptr, + plaintext_buffer, len(plaintext), + message_buffer, message_length, + ) + return message_buffer.raw -- cgit v1.2.3