192 lines
6.5 KiB
Python
192 lines
6.5 KiB
Python
from ._base import *
|
|
|
|
|
|
lib.olm_session_size.argtypes = []
|
|
lib.olm_session_size.restype = c_size_t
|
|
|
|
lib.olm_session.argtypes = [c_void_p]
|
|
lib.olm_session.restype = c_void_p
|
|
|
|
lib.olm_session_last_error.argtypes = [c_void_p]
|
|
lib.olm_session_last_error.restype = c_char_p
|
|
|
|
|
|
def session_errcheck(res, func, args):
|
|
if res == ERR:
|
|
raise OlmError("%s: %s" % (
|
|
func.__name__, lib.olm_session_last_error(args[0])
|
|
))
|
|
return res
|
|
|
|
|
|
def session_function(func, *types):
|
|
func.argtypes = (c_void_p,) + types
|
|
func.restypes = c_size_t
|
|
func.errcheck = session_errcheck
|
|
|
|
session_function(lib.olm_session_last_error)
|
|
session_function(
|
|
lib.olm_pickle_session, c_void_p, c_size_t, c_void_p, c_size_t
|
|
)
|
|
session_function(
|
|
lib.olm_unpickle_session, c_void_p, c_size_t, c_void_p, c_size_t
|
|
)
|
|
session_function(lib.olm_create_outbound_session_random_length)
|
|
session_function(
|
|
lib.olm_create_outbound_session,
|
|
c_void_p, # Account
|
|
c_void_p, c_size_t, # Identity Key
|
|
c_void_p, c_size_t, # One Time Key
|
|
c_void_p, c_size_t, # Random
|
|
)
|
|
session_function(
|
|
lib.olm_create_inbound_session,
|
|
c_void_p, # Account
|
|
c_void_p, c_size_t, # Pre Key Message
|
|
)
|
|
session_function(
|
|
lib.olm_create_inbound_session_from,
|
|
c_void_p, # Account
|
|
c_void_p, c_size_t, # Identity Key
|
|
c_void_p, c_size_t, # Pre Key Message
|
|
)
|
|
session_function(lib.olm_session_id_length)
|
|
session_function(lib.olm_session_id, c_void_p, c_size_t)
|
|
session_function(lib.olm_matches_inbound_session, c_void_p, c_size_t)
|
|
session_function(
|
|
lib.olm_matches_inbound_session_from,
|
|
c_void_p, c_size_t, # Identity Key
|
|
c_void_p, c_size_t, # Pre Key Message
|
|
)
|
|
session_function(lib.olm_encrypt_message_type)
|
|
session_function(lib.olm_encrypt_random_length)
|
|
session_function(lib.olm_encrypt_message_length, c_size_t)
|
|
session_function(
|
|
lib.olm_encrypt,
|
|
c_void_p, c_size_t, # Plaintext
|
|
c_void_p, c_size_t, # Random
|
|
c_void_p, c_size_t, # Message
|
|
);
|
|
session_function(
|
|
lib.olm_decrypt_max_plaintext_length,
|
|
c_size_t, # Message Type
|
|
c_void_p, c_size_t, # Message
|
|
)
|
|
session_function(
|
|
lib.olm_decrypt,
|
|
c_size_t, # Message Type
|
|
c_void_p, c_size_t, # Message
|
|
c_void_p, c_size_t, # Plaintext
|
|
)
|
|
|
|
class Session(object):
|
|
def __init__(self):
|
|
self.buf = create_string_buffer(lib.olm_session_size())
|
|
self.ptr = lib.olm_session(self.buf)
|
|
|
|
def pickle(self, key):
|
|
key_buffer = create_string_buffer(key)
|
|
pickle_length = lib.olm_pickle_session_length(self.ptr)
|
|
pickle_buffer = create_string_buffer(pickle_length)
|
|
lib.olm_pickle_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_session(
|
|
self.ptr, key_buffer, len(key), pickle_buffer, len(pickle)
|
|
)
|
|
|
|
def create_outbound(self, account, identity_key, one_time_key):
|
|
r_length = lib.olm_create_outbound_session_random_length(self.ptr)
|
|
random = read_random(r_length)
|
|
random_buffer = create_string_buffer(random)
|
|
identity_key_buffer = create_string_buffer(identity_key)
|
|
one_time_key_buffer = create_string_buffer(one_time_key)
|
|
lib.olm_create_outbound_session(
|
|
self.ptr,
|
|
account.ptr,
|
|
identity_key_buffer, len(identity_key),
|
|
one_time_key_buffer, len(one_time_key),
|
|
random_buffer, r_length
|
|
)
|
|
|
|
def create_inbound(self, account, one_time_key_message):
|
|
one_time_key_message_buffer = create_string_buffer(one_time_key_message)
|
|
lib.olm_create_inbound_session(
|
|
self.ptr,
|
|
account.ptr,
|
|
one_time_key_message_buffer, len(one_time_key_message)
|
|
)
|
|
|
|
def create_inbound_from(self, account, identity_key, one_time_key_message):
|
|
identity_key_buffer = create_string_buffer(identity_key)
|
|
one_time_key_message_buffer = create_string_buffer(one_time_key_message)
|
|
lib.olm_create_inbound_session_from(
|
|
self.ptr,
|
|
account.ptr,
|
|
identity_key_buffer, len(identity_key),
|
|
one_time_key_message_buffer, len(one_time_key_message)
|
|
)
|
|
|
|
def session_id(self):
|
|
id_length = lib.olm_session_id_length(self.ptr)
|
|
id_buffer = create_string_buffer(id_length)
|
|
lib.olm_session_id(self.ptr, id_buffer, id_length);
|
|
return id_buffer.raw
|
|
|
|
def matches_inbound(self, one_time_key_message):
|
|
one_time_key_message_buffer = create_string_buffer(one_time_key_message)
|
|
return bool(lib.olm_matches_inbound_session(
|
|
self.ptr,
|
|
one_time_key_message_buffer, len(one_time_key_message)
|
|
))
|
|
|
|
def matches_inbound_from(self, identity_key, one_time_key_message):
|
|
identity_key_buffer = create_string_buffer(identity_key)
|
|
one_time_key_message_buffer = create_string_buffer(one_time_key_message)
|
|
return bool(lib.olm_matches_inbound_session(
|
|
self.ptr,
|
|
identity_key_buffer, len(identity_key),
|
|
one_time_key_message_buffer, len(one_time_key_message)
|
|
))
|
|
|
|
def encrypt(self, plaintext):
|
|
r_length = lib.olm_encrypt_random_length(self.ptr)
|
|
random = read_random(r_length)
|
|
random_buffer = create_string_buffer(random)
|
|
|
|
message_type = lib.olm_encrypt_message_type(self.ptr)
|
|
message_length = lib.olm_encrypt_message_length(
|
|
self.ptr, len(plaintext)
|
|
)
|
|
message_buffer = create_string_buffer(message_length)
|
|
|
|
plaintext_buffer = create_string_buffer(plaintext)
|
|
|
|
lib.olm_encrypt(
|
|
self.ptr,
|
|
plaintext_buffer, len(plaintext),
|
|
random_buffer, r_length,
|
|
message_buffer, message_length,
|
|
)
|
|
return message_type, message_buffer.raw
|
|
|
|
def decrypt(self, message_type, message):
|
|
message_buffer = create_string_buffer(message)
|
|
max_plaintext_length = lib.olm_decrypt_max_plaintext_length(
|
|
self.ptr, message_type, message_buffer, len(message)
|
|
)
|
|
plaintext_buffer = create_string_buffer(max_plaintext_length)
|
|
message_buffer = create_string_buffer(message)
|
|
plaintext_length = lib.olm_decrypt(
|
|
self.ptr, message_type, message_buffer, len(message),
|
|
plaintext_buffer, max_plaintext_length
|
|
)
|
|
return plaintext_buffer.raw[:plaintext_length]
|
|
|
|
def clear(self):
|
|
pass
|