diff --git a/axolotl.py b/axolotl.py
new file mode 100755
index 0000000000000000000000000000000000000000..239a6ced75e2c89e89ee1bd30d0f0514adfce5d7
--- /dev/null
+++ b/axolotl.py
@@ -0,0 +1,436 @@
+#! /usr/bin/python
+from ctypes import *
+import json
+
+lib = cdll.LoadLibrary("build/libaxolotl.so")
+
+
+lib.axolotl_error.argtypes = []
+lib.axolotl_error.restypes = c_size_t
+
+ERR = lib.axolotl_error()
+
+class AxolotlError(Exception):
+ pass
+
+
+lib.axolotl_account_size.argtypes = []
+lib.axolotl_account_size.restype = c_size_t
+
+lib.axolotl_account.argtypes = [c_void_p]
+lib.axolotl_account.restype = c_void_p
+
+lib.axolotl_account_last_error.argtypes = [c_void_p]
+lib.axolotl_account_last_error.restype = c_char_p
+
+def account_errcheck(res, func, args):
+ if res == ERR:
+ raise AxolotlError("%s: %s" % (
+ func.__name__, lib.axolotl_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.axolotl_pickle_account, c_void_p, c_size_t, c_void_p, c_size_t
+)
+account_function(
+ lib.axolotl_unpickle_account, c_void_p, c_size_t, c_void_p, c_size_t
+)
+account_function(lib.axolotl_create_account_random_length)
+account_function(lib.axolotl_create_account, c_void_p, c_size_t)
+account_function(lib.axolotl_account_identity_keys_length)
+account_function(lib.axolotl_account_identity_keys, c_void_p, c_size_t)
+account_function(lib.axolotl_account_one_time_keys_length)
+account_function(lib.axolotl_account_one_time_keys, 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.axolotl_account_size())
+ self.ptr = lib.axolotl_account(self.buf)
+
+ def create(self):
+ random_length = lib.axolotl_create_account_random_length(self.ptr)
+ random = read_random(random_length)
+ random_buffer = create_string_buffer(random)
+ lib.axolotl_create_account(self.ptr, random_buffer, random_length)
+
+ def pickle(self, key):
+ key_buffer = create_string_buffer(key)
+ pickle_length = lib.axolotl_pickle_account_length(self.ptr)
+ pickle_buffer = create_string_buffer(pickle_length)
+ lib.axolotl_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.axolotl_unpickle_account(
+ self.ptr, key_buffer, len(key), pickle_buffer, len(pickle)
+ )
+
+ def identity_keys(self):
+ out_length = lib.axolotl_account_identity_keys_length(self.ptr)
+ out_buffer = create_string_buffer(out_length)
+ lib.axolotl_account_identity_keys(self.ptr, out_buffer, out_length)
+ return json.loads(out_buffer.raw)
+
+ def one_time_keys(self):
+ out_length = lib.axolotl_account_one_time_keys_length(self.ptr)
+ out_buffer = create_string_buffer(out_length)
+ lib.axolotl_account_one_time_keys(self.ptr, out_buffer, out_length)
+ return json.loads(out_buffer.raw)
+
+ def clear(self):
+ pass
+
+
+lib.axolotl_session_size.argtypes = []
+lib.axolotl_session_size.restype = c_size_t
+
+lib.axolotl_session.argtypes = [c_void_p]
+lib.axolotl_session.restype = c_void_p
+
+lib.axolotl_session_last_error.argtypes = [c_void_p]
+lib.axolotl_session_last_error.restype = c_char_p
+
+
+def session_errcheck(res, func, args):
+ if res == ERR:
+ raise AxolotlError("%s: %s" % (
+ func.__name__, lib.axolotl_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.axolotl_session_last_error)
+session_function(
+ lib.axolotl_pickle_session, c_void_p, c_size_t, c_void_p, c_size_t
+)
+session_function(
+ lib.axolotl_unpickle_session, c_void_p, c_size_t, c_void_p, c_size_t
+)
+session_function(lib.axolotl_create_outbound_session_random_length)
+session_function(
+ lib.axolotl_create_outbound_session,
+ c_void_p, # Account
+ c_void_p, c_size_t, # Identity Key
+ c_uint, # One Time Key Id
+ c_void_p, c_size_t, # One Time Key
+ c_void_p, c_size_t, # Random
+)
+session_function(
+ lib.axolotl_create_inbound_session,
+ c_void_p, # Account
+ c_void_p, c_size_t, # Pre Key Message
+)
+session_function(lib.axolotl_matches_inbound_session, c_void_p, c_size_t)
+session_function(lib.axolotl_encrypt_message_type)
+session_function(lib.axolotl_encrypt_random_length)
+session_function(lib.axolotl_encrypt_message_length, c_size_t)
+session_function(
+ lib.axolotl_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.axolotl_decrypt_max_plaintext_length,
+ c_size_t, # Message Type
+ c_void_p, c_size_t, # Message
+)
+session_function(
+ lib.axolotl_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.axolotl_session_size())
+ self.ptr = lib.axolotl_session(self.buf)
+
+ def pickle(self, key):
+ key_buffer = create_string_buffer(key)
+ pickle_length = lib.axolotl_pickle_session_length(self.ptr)
+ pickle_buffer = create_string_buffer(pickle_length)
+ lib.axolotl_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.axolotl_unpickle_session(
+ self.ptr, key_buffer, len(key), pickle_buffer, len(pickle)
+ )
+
+ def create_outbound(self, account, identity_key, one_time_key_id,
+ one_time_key):
+ r_length = lib.axolotl_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.axolotl_create_outbound_session(
+ self.ptr,
+ account.ptr,
+ identity_key_buffer, len(identity_key),
+ one_time_key_id,
+ 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.axolotl_create_inbound_session(
+ self.ptr,
+ account.ptr,
+ one_time_key_message_buffer, len(one_time_key_message)
+ )
+
+ def matches_inbound(self, one_time_key_message):
+ one_time_key_message_buffer = create_string_buffer(one_time_key_message)
+ return bool(lib.axolotl_create_inbound_session(
+ self.ptr,
+ one_time_key_message_buffer, len(one_time_key_message)
+ ))
+
+ def encrypt(self, plaintext):
+ r_length = lib.axolotl_encrypt_random_length(self.ptr)
+ random = read_random(r_length)
+ random_buffer = create_string_buffer(random)
+
+ message_type = lib.axolotl_encrypt_message_type(self.ptr)
+ message_length = lib.axolotl_encrypt_message_length(
+ self.ptr, len(plaintext)
+ )
+ message_buffer = create_string_buffer(message_length)
+
+ plaintext_buffer = create_string_buffer(plaintext)
+
+ lib.axolotl_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.axolotl_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.axolotl_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")
+
+ def do_keys(args):
+ account = Account()
+ with open(args.account_file, "rb") as f:
+ account.unpickle(args.key, f.read())
+ (r_id, id_key), (signed_id, signed_key) = account.identity_keys()
+ ot_keys = account.one_time_keys()
+ result1 = {
+ "identityKey": str(id_key),
+ "signedKey": {
+ "keyId": signed_id,
+ "publicKey": str(signed_key),
+ },
+ "lastResortKey": {
+ "keyId": ot_keys[0][0],
+ "publicKey": str(ot_keys[0][1]),
+ },
+ }
+ result2 = {
+ "oneTimeKeys": [{
+ "keyId": k[0],
+ "publicKey": str(k[1]),
+ } for k in ot_keys[1:]]
+ }
+ try:
+ yaml.dump(result1, sys.stdout, default_flow_style=False)
+ yaml.dump(result2, sys.stdout, default_flow_style=False)
+ except:
+ pass
+
+ keys.set_defaults(func=do_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("signed_key_id", help="Remote signed key id",
+ type=int)
+ outbound.add_argument("signed_key", help="Remote signed key")
+ outbound.add_argument("one_time_key_id", help="Remote one time key id",
+ type=int)
+ 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.account_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.signed_key_id, args.signed_key,
+ args.one_time_key_id, 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.account_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)
+
+ 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("plaintext_file", help="Plaintext", default="-")
+ decrypt.add_argument("message_file", help="Message", 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)
+
+