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2017-01-06Enable exporting inbound group session keysRichard van der Hoff
A pair of functions which allow you to export the megolm keys for an inbound group session, so that an application can save/restore them.
2016-10-25Document the return values for olm_matches_inbound_sessionMark Haines
2016-10-21Clear random buf in olm_init_outbound_group_sessionRichard van der Hoff
All the other methods clear their random inputs. This one needs to do the same, to reduce the risk of the randomness being used elsewhere and leaking key info.
2016-10-20Return the message index when decrypting group messages.Mark Haines
Applications can use the index to detect replays of the same message.
2016-09-16Update comment on olm_account_one_time_keysRichard van der Hoff
Document what it actually returns.
2016-09-13Merge pull request #23 from matrix-org/markjh/remove_message_indexMark Haines
Remove the messsage index from olm_init_inbound_group_session
2016-09-13Remove the messsage index from olm_init_inbound_group_session since it is ↵Mark Haines
read from the session_key
2016-09-13Add a olm_inbound_group_session_id methodMark Haines
2016-09-06Sign megolm messagesRichard van der Hoff
Add ed25519 keys to the inbound and outbound sessions, and use them to sign and verify megolm messages. We just stuff the ed25519 public key in alongside the megolm session key (and add a version byte), to save adding more boilerplate to the JS/python/etc layers.
2016-09-06Clean up some typosRichard van der Hoff
Remove redundant args from some js funcs, and fix a comment typo
2016-09-05Convert ed25519 pickling functions to CRichard van der Hoff
... so that I can use them from the group session bits.
2016-09-05Convert AES functions to plain CRichard van der Hoff
2016-09-05Convert Ed25519 and Curve25519 functions to plain CRichard van der Hoff
2016-09-05Merge pull request #15 from matrix-org/rav/has_received_messageRichard van der Hoff
OlmSession.has_received_message
2016-09-04OlmSession.has_received_messageRichard van der Hoff
I find myself wanting to know if an OlmSession is in the pre-key state or not, to help debugging at the application level.
2016-09-02Create new constants for key lengths, etcRichard van der Hoff
We were using olm::KEY_LENGTH for everything under the sun which happened to be 32 bytes long, and making a bunch of assumptions in the process. Create a bunch of new constants (as C #defines rather than C++ consts so that I can use them in another forthcoming refactor).
2016-09-01Fix Ed25519 keypair generationRichard van der Hoff
Ed25519 private keys, it turns out, have 64 bytes, not 32. We were previously generating only 32 bytes (which is all that is required to generate the public key), and then using the public key as the upper 32 bytes when generating the per-message session key. This meant that everything appeared to work, but the security of the private key was severely compromised. By way of fixes: * Use the correct algorithm for generating the Ed25519 private key, and store all 512 bits of it. * Update the account pickle format and refuse to load the old format (since we should consider it compromised). * Bump the library version, and add a function to retrieve the library version, so that applications can verify that they are linked against a fixed version of the library. * Remove the curve25519_{sign, verify} functions which were unused and of dubious quality.
2016-06-30Make space in the session pickle for chain indexRichard van der Hoff
Keeping track of the chain index is a useful thing to do, but is only required if we've enabled diagnostics. Extend the session pickle format to make a space for it, so that pickles can be transferred between the logging_enabled branch and the master branch without loss of information. Also add some tests for session pickling which explicitly check that we can unpickle both formats of pickle.
2016-06-30Remove unused 'chain_index' from RatchetRichard van der Hoff
This was introduced when I was experimenting with support for logging progress in Olm. That is now relegated to the logging_enabled branch, so this should probably be removed. This also fixes the incompatibility of session pickles from the current master branch with those from olm 0.1.0.
2016-05-25Remove session_id from group messagesRichard van der Hoff
Putting the session_id inside the packed message body makes it hard to extract so that we can decide which session to use. We don't think there is any advantage to having thes sesion_id protected by the HMACs, so we're going to move it to the JSON framing.
2016-05-24Separate base64ing from the rest of msg encodingRichard van der Hoff
Factor the actual message encoding/decoding and encrypting/decrypting out to separate functions from the top-level functions which do the base64-wrangling. This is particularly helpful in the 'outbound' code-path where the offsets required to allow room to base64-encode make the flow hard to see when it's all inline.
2016-05-24Update megolm_cipher as a global structRichard van der Hoff
Initialise megolm_cipher via the preprocessor macro, instead of with a function.
2016-05-24Fix up some names, and protobuf tagsRichard van der Hoff
Make names (of session_key and message_index) more consistent. Use our own protobuf tags rather than trying to piggyback on the one-to-one structure.
2016-05-24Implement decrypting inbound group messagesRichard van der Hoff
Includes creation of inbound sessions, etc
2016-05-24Implement functions to get the state of outbound sessionRichard van der Hoff
We need to be able to inspect an outbound session so that we can tell our peer how to set up an inbound session.
2016-05-24Implement pickling/unpickling for outbound group sessionsRichard van der Hoff
2016-05-24Implementation of an outbound group sessionRichard van der Hoff
2016-05-24Implementation of the megolm ratchetRichard van der Hoff
2016-05-24Factor out pickle_encoding from olm.cppRichard van der Hoff
We don't need to have all of the top-level pickling functions in olm.cpp; factor out the utilities to support it to pickle_encoding.cpp (and make sure that they have plain-C bindings).
2016-05-24Factor out olm_error_to_string to a separate fileRichard van der Hoff
I want to be able to use this functionality from elsewhere, so factor it out to its own file.
2016-05-24Rewrite _olm_cipher_aes_sha_256 initialisationRichard van der Hoff
Replace the init-static-var dance with some preprocessor macros
2016-05-24Remove 'destruct' from cipher_opsRichard van der Hoff
We never delete a cipher, and the destruct op is empty, so it's a bit pointless
2016-05-23Prefix for internal symbolsRichard van der Hoff
Give a load of internal symbols "_olm_" prefixes. This better delineates the public and private interfaces in the module, and helps avoid internal symbols leaking out and possibly being abused.
2016-05-23C bindings for base64 functionsRichard van der Hoff
2016-05-23C binding for olm::unsetRichard van der Hoff
2016-05-23C bindings for pickle functionsRichard van der Hoff
2016-05-23Convert cipher.hh to plain CRichard van der Hoff
2016-05-23Convert error.hh to plain CRichard van der Hoff
2016-05-23Give SHA256 functions C bindingsRichard van der Hoff
2016-05-23Rename olm.hh to olm.hRichard van der Hoff
2016-05-20Remove functions which return stringsRichard van der Hoff
We don't want anything which does dynamic memory allocation in the library.
2016-05-16Remove vestiges of loggingRichard van der Hoff
Remove the (now non-functional) declarations of olm_set_log_level in the C and js wrappers.
2016-05-16Remove logging functionalityRichard van der Hoff
Concerns have been raised that including logging functionality makes it harder to audit the implementation to ensure that no secret information is leaked. We are therefore removing it from the master branch.
2016-05-16translate logging.cpp to CRichard van der Hoff
2016-05-16Add olm::log_enabled_forRichard van der Hoff
2016-04-26Fix a bunch of compiler warnings, and turn on warnings.Richard van der Hoff
2016-04-26Add some logging to help understand what's going onRichard van der Hoff
2016-04-26Add a basic logging implementationRichard van der Hoff
2015-08-20Add docstrings for the utility classMark Haines
2015-08-19Add docstrings for the Session methodsMark Haines