diff options
Diffstat (limited to 'python')
| -rw-r--r-- | python/.gitignore | 3 | ||||
| -rwxr-xr-x | python/olm.py | 542 | ||||
| -rw-r--r-- | python/olm/__init__.py | 2 | ||||
| -rwxr-xr-x | python/olm/__main__.py | 210 | ||||
| -rw-r--r-- | python/olm/_base.py | 19 | ||||
| -rw-r--r-- | python/olm/account.py | 121 | ||||
| -rw-r--r-- | python/olm/session.py | 192 | ||||
| -rwxr-xr-x | python/test_olm.sh | 2 |
8 files changed, 548 insertions, 543 deletions
diff --git a/python/.gitignore b/python/.gitignore new file mode 100644 index 0000000..4e9d33a --- /dev/null +++ b/python/.gitignore @@ -0,0 +1,3 @@ +*.pyc +/*.account +/*.session diff --git a/python/olm.py b/python/olm.py deleted file mode 100755 index b048844..0000000 --- a/python/olm.py +++ /dev/null @@ -1,542 +0,0 @@ -#! /usr/bin/env python -from ctypes import * -import json -import os - -lib = cdll.LoadLibrary(os.path.join( - os.path.dirname(__file__), "..", "build", "libolm.so") -) - - -lib.olm_error.argtypes = [] -lib.olm_error.restypes = c_size_t - -ERR = lib.olm_error() - -class OlmError(Exception): - pass - - -lib.olm_account_size.argtypes = [] -lib.olm_account_size.restype = c_size_t - -lib.olm_account.argtypes = [c_void_p] -lib.olm_account.restype = c_void_p - -lib.olm_account_last_error.argtypes = [c_void_p] -lib.olm_account_last_error.restype = c_char_p - -def account_errcheck(res, func, args): - if res == ERR: - raise OlmError("%s: %s" % ( - func.__name__, lib.olm_account_last_error(args[0]) - )) - return res - - -def account_function(func, *types): - func.argtypes = (c_void_p,) + types - func.restypes = c_size_t - func.errcheck = account_errcheck - - -account_function( - lib.olm_pickle_account, c_void_p, c_size_t, c_void_p, c_size_t -) -account_function( - lib.olm_unpickle_account, c_void_p, c_size_t, c_void_p, c_size_t -) -account_function(lib.olm_create_account_random_length) -account_function(lib.olm_create_account, c_void_p, c_size_t) -account_function(lib.olm_account_identity_keys_length) -account_function(lib.olm_account_identity_keys, c_void_p, c_size_t) -account_function(lib.olm_account_signature_length) -account_function(lib.olm_account_sign, c_void_p, c_size_t, c_void_p, c_size_t) -account_function(lib.olm_account_one_time_keys_length) -account_function(lib.olm_account_one_time_keys, c_void_p, c_size_t) -account_function(lib.olm_account_mark_keys_as_published) -account_function(lib.olm_account_max_number_of_one_time_keys) -account_function( - lib.olm_account_generate_one_time_keys_random_length, - c_size_t -) -account_function( - lib.olm_account_generate_one_time_keys, - c_size_t, - c_void_p, c_size_t -) - - -def read_random(n): - with open("/dev/urandom", "rb") as f: - return f.read(n) - -class Account(object): - def __init__(self): - self.buf = create_string_buffer(lib.olm_account_size()) - self.ptr = lib.olm_account(self.buf) - - def create(self): - random_length = lib.olm_create_account_random_length(self.ptr) - random = read_random(random_length) - random_buffer = create_string_buffer(random) - lib.olm_create_account(self.ptr, random_buffer, random_length) - - def pickle(self, key): - key_buffer = create_string_buffer(key) - pickle_length = lib.olm_pickle_account_length(self.ptr) - pickle_buffer = create_string_buffer(pickle_length) - lib.olm_pickle_account( - 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_account( - self.ptr, key_buffer, len(key), pickle_buffer, len(pickle) - ) - - def identity_keys(self): - out_length = lib.olm_account_identity_keys_length(self.ptr) - out_buffer = create_string_buffer(out_length) - lib.olm_account_identity_keys( - self.ptr, - out_buffer, out_length - ) - return json.loads(out_buffer.raw) - - def sign(self, message): - out_length = lib.olm_account_signature_length(self.ptr) - message_buffer = create_string_buffer(message) - out_buffer = create_string_buffer(out_length) - lib.olm_account_sign( - self.ptr, message_buffer, len(message), out_buffer, out_length - ) - return out_buffer.raw - - def one_time_keys(self): - out_length = lib.olm_account_one_time_keys_length(self.ptr) - out_buffer = create_string_buffer(out_length) - lib.olm_account_one_time_keys(self.ptr, out_buffer, out_length) - return json.loads(out_buffer.raw) - - def mark_keys_as_published(self): - lib.olm_account_mark_keys_as_published(self.ptr) - - def max_number_of_one_time_keys(self): - return lib.olm_account_max_number_of_one_time_keys(self.ptr) - - def generate_one_time_keys(self, count): - random_length = lib.olm_account_generate_one_time_keys_random_length( - self.ptr, count - ) - random = read_random(random_length) - random_buffer = create_string_buffer(random) - lib.olm_account_generate_one_time_keys( - self.ptr, count, random_buffer, random_length - ) - - def clear(self): - pass - - -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 - - -if __name__ == '__main__': - import argparse - import sys - import os - import yaml - - parser = argparse.ArgumentParser() - parser.add_argument("--key", help="Account encryption key", default="") - commands = parser.add_subparsers() - - create_account = commands.add_parser("create_account", help="Create a new account") - create_account.add_argument("account_file", help="Local account file") - - def do_create_account(args): - if os.path.exists(args.account_file): - sys.stderr.write("Account %r file already exists" % ( - args.account_file, - )) - sys.exit(1) - account = Account() - account.create() - with open(args.account_file, "wb") as f: - f.write(account.pickle(args.key)) - - create_account.set_defaults(func=do_create_account) - - keys = commands.add_parser("keys", help="List public keys for an account") - keys.add_argument("account_file", help="Local account file") - keys.add_argument("--json", action="store_true", help="Output as JSON") - - def do_keys(args): - account = Account() - with open(args.account_file, "rb") as f: - account.unpickle(args.key, f.read()) - result = { - "account_keys": account.identity_keys(), - "one_time_keys": account.one_time_keys(), - } - try: - if args.json: - json.dump(result, sys.stdout, indent=4) - else: - yaml.safe_dump(result, sys.stdout, default_flow_style=False) - except: - pass - - keys.set_defaults(func=do_keys) - - sign = commands.add_parser("sign", help="Sign a message") - sign.add_argument("account_file", help="Local account file") - sign.add_argument("message_file", help="Message to sign") - sign.add_argument("signature_file", help="Signature to output") - - def do_sign(args): - account = Account() - with open(args.account_file, "rb") as f: - account.unpickle(args.key, f.read()) - with open_in(args.message_file) as f: - message = f.read() - signature = account.sign(message) - with open_out(args.signature_file) as f: - f.write(signature) - - sign.set_defaults(func=do_sign) - - - generate_keys = commands.add_parser("generate_keys", help="Generate one time keys") - generate_keys.add_argument("account_file", help="Local account file") - generate_keys.add_argument("count", type=int, help="Number of keys to generate") - - def do_generate_keys(args): - account = Account() - with open(args.account_file, "rb") as f: - account.unpickle(args.key, f.read()) - account.generate_one_time_keys(args.count) - with open(args.account_file, "wb") as f: - f.write(account.pickle(args.key)) - - generate_keys.set_defaults(func=do_generate_keys) - - - outbound = commands.add_parser("outbound", help="Create an outbound session") - outbound.add_argument("account_file", help="Local account file") - outbound.add_argument("session_file", help="Local session file") - outbound.add_argument("identity_key", help="Remote identity key") - outbound.add_argument("one_time_key", help="Remote one time key") - - def do_outbound(args): - if os.path.exists(args.session_file): - sys.stderr.write("Session %r file already exists" % ( - args.session_file, - )) - sys.exit(1) - account = Account() - with open(args.account_file, "rb") as f: - account.unpickle(args.key, f.read()) - session = Session() - session.create_outbound( - account, args.identity_key, args.one_time_key - ) - with open(args.session_file, "wb") as f: - f.write(session.pickle(args.key)) - - outbound.set_defaults(func=do_outbound) - - def open_in(path): - if path == "-": - return sys.stdin - else: - return open(path, "rb") - - def open_out(path): - if path == "-": - return sys.stdout - else: - return open(path, "wb") - - inbound = commands.add_parser("inbound", help="Create an inbound session") - inbound.add_argument("account_file", help="Local account file") - inbound.add_argument("session_file", help="Local session file") - inbound.add_argument("message_file", help="Message", default="-") - inbound.add_argument("plaintext_file", help="Plaintext", default="-") - - def do_inbound(args): - if os.path.exists(args.session_file): - sys.stderr.write("Session %r file already exists" % ( - args.session_file, - )) - sys.exit(1) - account = Account() - with open(args.account_file, "rb") as f: - account.unpickle(args.key, f.read()) - with open_in(args.message_file) as f: - message_type = f.read(8) - message = f.read() - if message_type != "PRE_KEY ": - sys.stderr.write("Expecting a PRE_KEY message") - sys.exit(1) - session = Session() - session.create_inbound(account, message) - plaintext = session.decrypt(0, message) - with open(args.session_file, "wb") as f: - f.write(session.pickle(args.key)) - with open_out(args.plaintext_file) as f: - f.write(plaintext) - - inbound.set_defaults(func=do_inbound) - - session_id = commands.add_parser("session_id", help="Session ID") - session_id.add_argument("session_file", help="Local session file") - - def do_session_id(args): - session = Session() - with open(args.session_file, "rb") as f: - session.unpickle(args.key, f.read()) - sys.stdout.write(session.session_id() + "\n") - - session_id.set_defaults(func=do_session_id) - - encrypt = commands.add_parser("encrypt", help="Encrypt a message") - encrypt.add_argument("session_file", help="Local session file") - encrypt.add_argument("plaintext_file", help="Plaintext", default="-") - encrypt.add_argument("message_file", help="Message", default="-") - - def do_encrypt(args): - session = Session() - with open(args.session_file, "rb") as f: - session.unpickle(args.key, f.read()) - with open_in(args.plaintext_file) as f: - plaintext = f.read() - message_type, message = session.encrypt(plaintext) - with open(args.session_file, "wb") as f: - f.write(session.pickle(args.key)) - with open_out(args.message_file) as f: - f.write(["PRE_KEY ", "MESSAGE "][message_type]) - f.write(message) - - encrypt.set_defaults(func=do_encrypt) - - decrypt = commands.add_parser("decrypt", help="Decrypt a message") - decrypt.add_argument("session_file", help="Local session file") - decrypt.add_argument("message_file", help="Message", default="-") - decrypt.add_argument("plaintext_file", help="Plaintext", default="-") - - def do_decrypt(args): - session = Session() - with open(args.session_file, "rb") as f: - session.unpickle(args.key, f.read()) - with open_in(args.message_file) as f: - message_type = f.read(8) - message = f.read() - if message_type not in {"PRE_KEY ", "MESSAGE "}: - sys.stderr.write("Expecting a PRE_KEY or MESSAGE message") - sys.exit(1) - message_type = 1 if message_type == "MESSAGE " else 0 - plaintext = session.decrypt(message_type, message) - with open(args.session_file, "wb") as f: - f.write(session.pickle(args.key)) - with open_out(args.plaintext_file) as f: - f.write(plaintext) - - decrypt.set_defaults(func=do_decrypt) - - args = parser.parse_args() - args.func(args) - - diff --git a/python/olm/__init__.py b/python/olm/__init__.py new file mode 100644 index 0000000..5520132 --- /dev/null +++ b/python/olm/__init__.py @@ -0,0 +1,2 @@ +from .account import Account +from .session import Session diff --git a/python/olm/__main__.py b/python/olm/__main__.py new file mode 100755 index 0000000..d2b0d38 --- /dev/null +++ b/python/olm/__main__.py @@ -0,0 +1,210 @@ +#! /usr/bin/env python + +import argparse +import json +import os +import sys +import yaml + +from . import * + +if __name__ == '__main__': + parser = argparse.ArgumentParser() + parser.add_argument("--key", help="Account encryption key", default="") + commands = parser.add_subparsers() + + create_account = commands.add_parser("create_account", help="Create a new account") + create_account.add_argument("account_file", help="Local account file") + + def do_create_account(args): + if os.path.exists(args.account_file): + sys.stderr.write("Account %r file already exists" % ( + args.account_file, + )) + sys.exit(1) + account = Account() + account.create() + with open(args.account_file, "wb") as f: + f.write(account.pickle(args.key)) + + create_account.set_defaults(func=do_create_account) + + keys = commands.add_parser("keys", help="List public keys for an account") + keys.add_argument("account_file", help="Local account file") + keys.add_argument("--json", action="store_true", help="Output as JSON") + + def do_keys(args): + account = Account() + with open(args.account_file, "rb") as f: + account.unpickle(args.key, f.read()) + result = { + "account_keys": account.identity_keys(), + "one_time_keys": account.one_time_keys(), + } + try: + if args.json: + json.dump(result, sys.stdout, indent=4) + else: + yaml.safe_dump(result, sys.stdout, default_flow_style=False) + except: + pass + + keys.set_defaults(func=do_keys) + + sign = commands.add_parser("sign", help="Sign a message") + sign.add_argument("account_file", help="Local account file") + sign.add_argument("message_file", help="Message to sign") + sign.add_argument("signature_file", help="Signature to output") + + def do_sign(args): + account = Account() + with open(args.account_file, "rb") as f: + account.unpickle(args.key, f.read()) + with open_in(args.message_file) as f: + message = f.read() + signature = account.sign(message) + with open_out(args.signature_file) as f: + f.write(signature) + + sign.set_defaults(func=do_sign) + + + generate_keys = commands.add_parser("generate_keys", help="Generate one time keys") + generate_keys.add_argument("account_file", help="Local account file") + generate_keys.add_argument("count", type=int, help="Number of keys to generate") + + def do_generate_keys(args): + account = Account() + with open(args.account_file, "rb") as f: + account.unpickle(args.key, f.read()) + account.generate_one_time_keys(args.count) + with open(args.account_file, "wb") as f: + f.write(account.pickle(args.key)) + + generate_keys.set_defaults(func=do_generate_keys) + + + outbound = commands.add_parser("outbound", help="Create an outbound session") + outbound.add_argument("account_file", help="Local account file") + outbound.add_argument("session_file", help="Local session file") + outbound.add_argument("identity_key", help="Remote identity key") + outbound.add_argument("one_time_key", help="Remote one time key") + + def do_outbound(args): + if os.path.exists(args.session_file): + sys.stderr.write("Session %r file already exists" % ( + args.session_file, + )) + sys.exit(1) + account = Account() + with open(args.account_file, "rb") as f: + account.unpickle(args.key, f.read()) + session = Session() + session.create_outbound( + account, args.identity_key, args.one_time_key + ) + with open(args.session_file, "wb") as f: + f.write(session.pickle(args.key)) + + outbound.set_defaults(func=do_outbound) + + def open_in(path): + if path == "-": + return sys.stdin + else: + return open(path, "rb") + + def open_out(path): + if path == "-": + return sys.stdout + else: + return open(path, "wb") + + inbound = commands.add_parser("inbound", help="Create an inbound session") + inbound.add_argument("account_file", help="Local account file") + inbound.add_argument("session_file", help="Local session file") + inbound.add_argument("message_file", help="Message", default="-") + inbound.add_argument("plaintext_file", help="Plaintext", default="-") + + def do_inbound(args): + if os.path.exists(args.session_file): + sys.stderr.write("Session %r file already exists" % ( + args.session_file, + )) + sys.exit(1) + account = Account() + with open(args.account_file, "rb") as f: + account.unpickle(args.key, f.read()) + with open_in(args.message_file) as f: + message_type = f.read(8) + message = f.read() + if message_type != "PRE_KEY ": + sys.stderr.write("Expecting a PRE_KEY message") + sys.exit(1) + session = Session() + session.create_inbound(account, message) + plaintext = session.decrypt(0, message) + with open(args.session_file, "wb") as f: + f.write(session.pickle(args.key)) + with open_out(args.plaintext_file) as f: + f.write(plaintext) + + inbound.set_defaults(func=do_inbound) + + session_id = commands.add_parser("session_id", help="Session ID") + session_id.add_argument("session_file", help="Local session file") + + def do_session_id(args): + session = Session() + with open(args.session_file, "rb") as f: + session.unpickle(args.key, f.read()) + sys.stdout.write(session.session_id() + "\n") + + session_id.set_defaults(func=do_session_id) + + encrypt = commands.add_parser("encrypt", help="Encrypt a message") + encrypt.add_argument("session_file", help="Local session file") + encrypt.add_argument("plaintext_file", help="Plaintext", default="-") + encrypt.add_argument("message_file", help="Message", default="-") + + def do_encrypt(args): + session = Session() + with open(args.session_file, "rb") as f: + session.unpickle(args.key, f.read()) + with open_in(args.plaintext_file) as f: + plaintext = f.read() + message_type, message = session.encrypt(plaintext) + with open(args.session_file, "wb") as f: + f.write(session.pickle(args.key)) + with open_out(args.message_file) as f: + f.write(["PRE_KEY ", "MESSAGE "][message_type]) + f.write(message) + + encrypt.set_defaults(func=do_encrypt) + + decrypt = commands.add_parser("decrypt", help="Decrypt a message") + decrypt.add_argument("session_file", help="Local session file") + decrypt.add_argument("message_file", help="Message", default="-") + decrypt.add_argument("plaintext_file", help="Plaintext", default="-") + + def do_decrypt(args): + session = Session() + with open(args.session_file, "rb") as f: + session.unpickle(args.key, f.read()) + with open_in(args.message_file) as f: + message_type = f.read(8) + message = f.read() + if message_type not in {"PRE_KEY ", "MESSAGE "}: + sys.stderr.write("Expecting a PRE_KEY or MESSAGE message") + sys.exit(1) + message_type = 1 if message_type == "MESSAGE " else 0 + plaintext = session.decrypt(message_type, message) + with open(args.session_file, "wb") as f: + f.write(session.pickle(args.key)) + with open_out(args.plaintext_file) as f: + f.write(plaintext) + + decrypt.set_defaults(func=do_decrypt) + + args = parser.parse_args() + args.func(args) diff --git a/python/olm/_base.py b/python/olm/_base.py new file mode 100644 index 0000000..8238957 --- /dev/null +++ b/python/olm/_base.py @@ -0,0 +1,19 @@ +import os.path + +from ctypes import * + +def read_random(n): + with open("/dev/urandom", "rb") as f: + return f.read(n) + +lib = cdll.LoadLibrary(os.path.join( + os.path.dirname(__file__), "..", "..", "build", "libolm.so") +) + +lib.olm_error.argtypes = [] +lib.olm_error.restypes = c_size_t + +ERR = lib.olm_error() + +class OlmError(Exception): + pass diff --git a/python/olm/account.py b/python/olm/account.py new file mode 100644 index 0000000..7673329 --- /dev/null +++ b/python/olm/account.py @@ -0,0 +1,121 @@ +import json + +from ._base import * + +lib.olm_account_size.argtypes = [] +lib.olm_account_size.restype = c_size_t + +lib.olm_account.argtypes = [c_void_p] +lib.olm_account.restype = c_void_p + +lib.olm_account_last_error.argtypes = [c_void_p] +lib.olm_account_last_error.restype = c_char_p + +def account_errcheck(res, func, args): + if res == ERR: + raise OlmError("%s: %s" % ( + func.__name__, lib.olm_account_last_error(args[0]) + )) + return res + + +def account_function(func, *types): + func.argtypes = (c_void_p,) + types + func.restypes = c_size_t + func.errcheck = account_errcheck + + +account_function( + lib.olm_pickle_account, c_void_p, c_size_t, c_void_p, c_size_t +) +account_function( + lib.olm_unpickle_account, c_void_p, c_size_t, c_void_p, c_size_t +) +account_function(lib.olm_create_account_random_length) +account_function(lib.olm_create_account, c_void_p, c_size_t) +account_function(lib.olm_account_identity_keys_length) +account_function(lib.olm_account_identity_keys, c_void_p, c_size_t) +account_function(lib.olm_account_signature_length) +account_function(lib.olm_account_sign, c_void_p, c_size_t, c_void_p, c_size_t) +account_function(lib.olm_account_one_time_keys_length) +account_function(lib.olm_account_one_time_keys, c_void_p, c_size_t) +account_function(lib.olm_account_mark_keys_as_published) +account_function(lib.olm_account_max_number_of_one_time_keys) +account_function( + lib.olm_account_generate_one_time_keys_random_length, + c_size_t +) +account_function( + lib.olm_account_generate_one_time_keys, + c_size_t, + c_void_p, c_size_t +) +class Account(object): + def __init__(self): + self.buf = create_string_buffer(lib.olm_account_size()) + self.ptr = lib.olm_account(self.buf) + + def create(self): + random_length = lib.olm_create_account_random_length(self.ptr) + random = read_random(random_length) + random_buffer = create_string_buffer(random) + lib.olm_create_account(self.ptr, random_buffer, random_length) + + def pickle(self, key): + key_buffer = create_string_buffer(key) + pickle_length = lib.olm_pickle_account_length(self.ptr) + pickle_buffer = create_string_buffer(pickle_length) + lib.olm_pickle_account( + 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_account( + self.ptr, key_buffer, len(key), pickle_buffer, len(pickle) + ) + + def identity_keys(self): + out_length = lib.olm_account_identity_keys_length(self.ptr) + out_buffer = create_string_buffer(out_length) + lib.olm_account_identity_keys( + self.ptr, + out_buffer, out_length + ) + return json.loads(out_buffer.raw) + + def sign(self, message): + out_length = lib.olm_account_signature_length(self.ptr) + message_buffer = create_string_buffer(message) + out_buffer = create_string_buffer(out_length) + lib.olm_account_sign( + self.ptr, message_buffer, len(message), out_buffer, out_length + ) + return out_buffer.raw + + def one_time_keys(self): + out_length = lib.olm_account_one_time_keys_length(self.ptr) + out_buffer = create_string_buffer(out_length) + lib.olm_account_one_time_keys(self.ptr, out_buffer, out_length) + return json.loads(out_buffer.raw) + + def mark_keys_as_published(self): + lib.olm_account_mark_keys_as_published(self.ptr) + + def max_number_of_one_time_keys(self): + return lib.olm_account_max_number_of_one_time_keys(self.ptr) + + def generate_one_time_keys(self, count): + random_length = lib.olm_account_generate_one_time_keys_random_length( + self.ptr, count + ) + random = read_random(random_length) + random_buffer = create_string_buffer(random) + lib.olm_account_generate_one_time_keys( + self.ptr, count, random_buffer, random_length + ) + + def clear(self): + pass diff --git a/python/olm/session.py b/python/olm/session.py new file mode 100644 index 0000000..308f220 --- /dev/null +++ b/python/olm/session.py @@ -0,0 +1,192 @@ +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 diff --git a/python/test_olm.sh b/python/test_olm.sh index 78cd3c2..b575cbf 100755 --- a/python/test_olm.sh +++ b/python/test_olm.sh @@ -1,6 +1,6 @@ #! /bin/bash -OLM="$(dirname $0)/olm.py" +OLM="python -m olm" ALICE_ACCOUNT=alice.account ALICE_SESSION=alice.session |